Initial commit.

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrCollections.php

@@ -0,0 +1,129 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTypes.php';
+
+/**
+ * Defines common attribute collections that modules reference
+ */
+
+class HTMLPurifier_AttrCollections
+{
+    
+    /**
+     * Associative array of attribute collections, indexed by name
+     */
+    public $info = array();
+    
+    /**
+     * Performs all expansions on internal data for use by other inclusions
+     * It also collects all attribute collection extensions from
+     * modules
+     * @param $attr_types HTMLPurifier_AttrTypes instance
+     * @param $modules Hash array of HTMLPurifier_HTMLModule members
+     */
+    public function __construct($attr_types, $modules) {
+        // load extensions from the modules
+        foreach ($modules as $module) {
+            foreach ($module->attr_collections as $coll_i => $coll) {
+                if (!isset($this->info[$coll_i])) {
+                    $this->info[$coll_i] = array();
+                }
+                foreach ($coll as $attr_i => $attr) {
+                    if ($attr_i === 0 && isset($this->info[$coll_i][$attr_i])) {
+                        // merge in includes
+                        $this->info[$coll_i][$attr_i] = array_merge(
+                            $this->info[$coll_i][$attr_i], $attr);
+                        continue;
+                    }
+                    $this->info[$coll_i][$attr_i] = $attr;
+                }
+            }
+        }
+        // perform internal expansions and inclusions
+        foreach ($this->info as $name => $attr) {
+            // merge attribute collections that include others
+            $this->performInclusions($this->info[$name]);
+            // replace string identifiers with actual attribute objects
+            $this->expandIdentifiers($this->info[$name], $attr_types);
+        }
+    }
+    
+    /**
+     * Takes a reference to an attribute associative array and performs
+     * all inclusions specified by the zero index.
+     * @param &$attr Reference to attribute array
+     */
+    public function performInclusions(&$attr) {
+        if (!isset($attr[0])) return;
+        $merge = $attr[0];
+        $seen  = array(); // recursion guard
+        // loop through all the inclusions
+        for ($i = 0; isset($merge[$i]); $i++) {
+            if (isset($seen[$merge[$i]])) continue;
+            $seen[$merge[$i]] = true;
+            // foreach attribute of the inclusion, copy it over
+            if (!isset($this->info[$merge[$i]])) continue;
+            foreach ($this->info[$merge[$i]] as $key => $value) {
+                if (isset($attr[$key])) continue; // also catches more inclusions
+                $attr[$key] = $value;
+            }
+            if (isset($this->info[$merge[$i]][0])) {
+                // recursion
+                $merge = array_merge($merge, $this->info[$merge[$i]][0]);
+            }
+        }
+        unset($attr[0]);
+    }
+    
+    /**
+     * Expands all string identifiers in an attribute array by replacing
+     * them with the appropriate values inside HTMLPurifier_AttrTypes
+     * @param &$attr Reference to attribute array
+     * @param $attr_types HTMLPurifier_AttrTypes instance
+     */
+    public function expandIdentifiers(&$attr, $attr_types) {
+        
+        // because foreach will process new elements we add, make sure we
+        // skip duplicates
+        $processed = array();
+        
+        foreach ($attr as $def_i => $def) {
+            // skip inclusions
+            if ($def_i === 0) continue;
+            
+            if (isset($processed[$def_i])) continue;
+            
+            // determine whether or not attribute is required
+            if ($required = (strpos($def_i, '*') !== false)) {
+                // rename the definition
+                unset($attr[$def_i]);
+                $def_i = trim($def_i, '*');
+                $attr[$def_i] = $def;
+            }
+            
+            $processed[$def_i] = true;
+            
+            // if we've already got a literal object, move on
+            if (is_object($def)) {
+                // preserve previous required
+                $attr[$def_i]->required = ($required || $attr[$def_i]->required);
+                continue;
+            }
+            
+            if ($def === false) {
+                unset($attr[$def_i]);
+                continue;
+            }
+            
+            if ($t = $attr_types->get($def)) {
+                $attr[$def_i] = $t;
+                $attr[$def_i]->required = $required;
+            } else {
+                unset($attr[$def_i]);
+            }
+        }
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef.php

@@ -0,0 +1,80 @@
+<?php
+
+/**
+ * Base class for all validating attribute definitions.
+ * 
+ * This family of classes forms the core for not only HTML attribute validation,
+ * but also any sort of string that needs to be validated or cleaned (which
+ * means CSS properties and composite definitions are defined here too).  
+ * Besides defining (through code) what precisely makes the string valid,
+ * subclasses are also responsible for cleaning the code if possible.
+ */
+
+abstract class HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Tells us whether or not an HTML attribute is minimized. Has no
+     * meaning in other contexts.
+     */
+    public $minimized = false;
+    
+    /**
+     * Tells us whether or not an HTML attribute is required. Has no
+     * meaning in other contexts
+     */
+    public $required = false;
+    
+    /**
+     * Validates and cleans passed string according to a definition.
+     * 
+     * @param $string String to be validated and cleaned.
+     * @param $config Mandatory HTMLPurifier_Config object.
+     * @param $context Mandatory HTMLPurifier_AttrContext object.
+     */
+    abstract public function validate($string, $config, $context);
+    
+    /**
+     * Convenience method that parses a string as if it were CDATA.
+     * 
+     * This method process a string in the manner specified at
+     * <http://www.w3.org/TR/html4/types.html#h-6.2> by removing
+     * leading and trailing whitespace, ignoring line feeds, and replacing
+     * carriage returns and tabs with spaces.  While most useful for HTML
+     * attributes specified as CDATA, it can also be applied to most CSS
+     * values.
+     * 
+     * @note This method is not entirely standards compliant, as trim() removes
+     *       more types of whitespace than specified in the spec. In practice,
+     *       this is rarely a problem, as those extra characters usually have
+     *       already been removed by HTMLPurifier_Encoder.
+     * 
+     * @warning This processing is inconsistent with XML's whitespace handling
+     *          as specified by section 3.3.3 and referenced XHTML 1.0 section
+     *          4.7.  Compliant processing requires all line breaks normalized
+     *          to "\n", so the fix is not as simple as fixing it in this
+     *          function.  Trim and whitespace collapsing are supposed to only
+     *          occur in NMTOKENs.  However, note that we are NOT necessarily
+     *          parsing XML, thus, this behavior may still be correct.
+     */
+    public function parseCDATA($string) {
+        $string = trim($string);
+        $string = str_replace("\n", '', $string);
+        $string = str_replace(array("\r", "\t"), ' ', $string);
+        return $string;
+    }
+    
+    /**
+     * Factory method for creating this class from a string.
+     * @param $string String construction info
+     * @return Created AttrDef object corresponding to $string
+     */
+    public function make($string) {
+        // default implementation, return flyweight of this object
+        // if overloaded, it is *necessary* for you to clone the
+        // object (usually by instantiating a new copy) and return that
+        return $this;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS.php

@@ -0,0 +1,81 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/CSSDefinition.php';
+
+/**
+ * Validates the HTML attribute style, otherwise known as CSS.
+ * @note We don't implement the whole CSS specification, so it might be
+ *       difficult to reuse this component in the context of validating
+ *       actual stylesheet declarations.
+ * @note If we were really serious about validating the CSS, we would
+ *       tokenize the styles and then parse the tokens. Obviously, we
+ *       are not doing that. Doing that could seriously harm performance,
+ *       but would make these components a lot more viable for a CSS
+ *       filtering solution.
+ */
+class HTMLPurifier_AttrDef_CSS extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($css, $config, $context) {
+        
+        $css = $this->parseCDATA($css);
+        
+        $definition = $config->getCSSDefinition();
+        
+        // we're going to break the spec and explode by semicolons.
+        // This is because semicolon rarely appears in escaped form
+        // Doing this is generally flaky but fast
+        // IT MIGHT APPEAR IN URIs, see HTMLPurifier_AttrDef_CSSURI
+        // for details
+        
+        $declarations = explode(';', $css);
+        $propvalues = array();
+        
+        foreach ($declarations as $declaration) {
+            if (!$declaration) continue;
+            if (!strpos($declaration, ':')) continue;
+            list($property, $value) = explode(':', $declaration, 2);
+            $property = trim($property);
+            $value    = trim($value);
+            $ok = false;
+            do {
+                if (isset($definition->info[$property])) {
+                    $ok = true;
+                    break;
+                }
+                if (ctype_lower($property)) break;
+                $property = strtolower($property);
+                if (isset($definition->info[$property])) {
+                    $ok = true;
+                    break;
+                }
+            } while(0);
+            if (!$ok) continue;
+            // inefficient call, since the validator will do this again
+            if (strtolower(trim($value)) !== 'inherit') {
+                // inherit works for everything (but only on the base property)
+                $result = $definition->info[$property]->validate(
+                    $value, $config, $context );
+            } else {
+                $result = 'inherit';
+            }
+            if ($result === false) continue;
+            $propvalues[$property] = $result;
+        }
+        
+        // procedure does not write the new CSS simultaneously, so it's
+        // slightly inefficient, but it's the only way of getting rid of
+        // duplicates. Perhaps config to optimize it, but not now.
+        
+        $new_declarations = '';
+        foreach ($propvalues as $prop => $value) {
+            $new_declarations .= "$prop:$value;";
+        }
+        
+        return $new_declarations ? $new_declarations : false;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/AlphaValue.php

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+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Number.php';
+
+class HTMLPurifier_AttrDef_CSS_AlphaValue extends HTMLPurifier_AttrDef_CSS_Number
+{
+    
+    public function __construct() {
+        parent::__construct(false); // opacity is non-negative, but we will clamp it
+    }
+    
+    public function validate($number, $config, $context) {
+        $result = parent::validate($number, $config, $context);
+        if ($result === false) return $result;
+        $float = (float) $result;
+        if ($float < 0.0) $result = '0';
+        if ($float > 1.0) $result = '1';
+        return $result;
+    }
+    
+}

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Background.php

@@ -0,0 +1,86 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/CSSDefinition.php';
+
+/**
+ * Validates shorthand CSS property background.
+ * @warning Does not support url tokens that have internal spaces.
+ */
+class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Local copy of component validators.
+     * @note See HTMLPurifier_AttrDef_Font::$info for a similar impl.
+     */
+    protected $info;
+    
+    public function __construct($config) {
+        $def = $config->getCSSDefinition();
+        $this->info['background-color'] = $def->info['background-color'];
+        $this->info['background-image'] = $def->info['background-image'];
+        $this->info['background-repeat'] = $def->info['background-repeat'];
+        $this->info['background-attachment'] = $def->info['background-attachment'];
+        $this->info['background-position'] = $def->info['background-position'];
+    }
+    
+    public function validate($string, $config, $context) {
+        
+        // regular pre-processing
+        $string = $this->parseCDATA($string);
+        if ($string === '') return false;
+        
+        // assumes URI doesn't have spaces in it
+        $bits = explode(' ', strtolower($string)); // bits to process
+        
+        $caught = array();
+        $caught['color']    = false;
+        $caught['image']    = false;
+        $caught['repeat']   = false;
+        $caught['attachment'] = false;
+        $caught['position'] = false;
+        
+        $i = 0; // number of catches
+        $none = false;
+        
+        foreach ($bits as $bit) {
+            if ($bit === '') continue;
+            foreach ($caught as $key => $status) {
+                if ($key != 'position') {
+                    if ($status !== false) continue;
+                    $r = $this->info['background-' . $key]->validate($bit, $config, $context);
+                } else {
+                    $r = $bit;
+                }
+                if ($r === false) continue;
+                if ($key == 'position') {
+                    if ($caught[$key] === false) $caught[$key] = '';
+                    $caught[$key] .= $r . ' ';
+                } else {
+                    $caught[$key] = $r;
+                }
+                $i++;
+                break;
+            }
+        }
+        
+        if (!$i) return false;
+        if ($caught['position'] !== false) {
+            $caught['position'] = $this->info['background-position']->
+                validate($caught['position'], $config, $context);
+        }
+        
+        $ret = array();
+        foreach ($caught as $value) {
+            if ($value === false) continue;
+            $ret[] = $value;
+        }
+        
+        if (empty($ret)) return false;
+        return implode(' ', $ret);
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php

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+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Length.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Percentage.php';
+
+/* W3C says:
+    [ // adjective and number must be in correct order, even if
+      // you could switch them without introducing ambiguity.
+      // some browsers support that syntax
+        [
+            <percentage> | <length> | left | center | right
+        ]
+        [ 
+            <percentage> | <length> | top | center | bottom
+        ]?
+    ] |
+    [ // this signifies that the vertical and horizontal adjectives
+      // can be arbitrarily ordered, however, there can only be two,
+      // one of each, or none at all
+        [
+            left | center | right
+        ] ||
+        [
+            top | center | bottom
+        ]
+    ]
+    top, left = 0%
+    center, (none) = 50%
+    bottom, right = 100%
+*/
+
+/* QuirksMode says:
+    keyword + length/percentage must be ordered correctly, as per W3C
+    
+    Internet Explorer and Opera, however, support arbitrary ordering. We
+    should fix it up.
+    
+    Minor issue though, not strictly necessary.
+*/
+
+// control freaks may appreciate the ability to convert these to
+// percentages or something, but it's not necessary
+
+/**
+ * Validates the value of background-position.
+ */
+class HTMLPurifier_AttrDef_CSS_BackgroundPosition extends HTMLPurifier_AttrDef
+{
+    
+    protected $length;
+    protected $percentage;
+    
+    public function __construct() {
+        $this->length     = new HTMLPurifier_AttrDef_CSS_Length();
+        $this->percentage = new HTMLPurifier_AttrDef_CSS_Percentage();
+    }
+    
+    public function validate($string, $config, $context) {
+        $string = $this->parseCDATA($string);
+        $bits = explode(' ', $string);
+        
+        $keywords = array();
+        $keywords['h'] = false; // left, right
+        $keywords['v'] = false; // top, bottom
+        $keywords['c'] = false; // center
+        $measures = array();
+        
+        $i = 0;
+        
+        $lookup = array(
+            'top' => 'v',
+            'bottom' => 'v',
+            'left' => 'h',
+            'right' => 'h',
+            'center' => 'c'
+        );
+        
+        foreach ($bits as $bit) {
+            if ($bit === '') continue;
+            
+            // test for keyword
+            $lbit = ctype_lower($bit) ? $bit : strtolower($bit);
+            if (isset($lookup[$lbit])) {
+                $status = $lookup[$lbit];
+                $keywords[$status] = $lbit;
+                $i++;
+            }
+            
+            // test for length
+            $r = $this->length->validate($bit, $config, $context);
+            if ($r !== false) {
+                $measures[] = $r;
+                $i++;
+            }
+            
+            // test for percentage
+            $r = $this->percentage->validate($bit, $config, $context);
+            if ($r !== false) {
+                $measures[] = $r;
+                $i++;
+            }
+            
+        }
+        
+        if (!$i) return false; // no valid values were caught
+        
+        
+        $ret = array();
+        
+        // first keyword
+        if     ($keywords['h'])     $ret[] = $keywords['h'];
+        elseif (count($measures))   $ret[] = array_shift($measures);
+        elseif ($keywords['c']) {
+            $ret[] = $keywords['c'];
+            $keywords['c'] = false; // prevent re-use: center = center center
+        }
+        
+        if     ($keywords['v'])     $ret[] = $keywords['v'];
+        elseif (count($measures))   $ret[] = array_shift($measures);
+        elseif ($keywords['c'])     $ret[] = $keywords['c'];
+        
+        if (empty($ret)) return false;
+        return implode(' ', $ret);
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Border.php

@@ -0,0 +1,44 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates the border property as defined by CSS.
+ */
+class HTMLPurifier_AttrDef_CSS_Border extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Local copy of properties this property is shorthand for.
+     */
+    protected $info = array();
+    
+    public function __construct($config) {
+        $def = $config->getCSSDefinition();
+        $this->info['border-width'] = $def->info['border-width'];
+        $this->info['border-style'] = $def->info['border-style'];
+        $this->info['border-top-color'] = $def->info['border-top-color'];
+    }
+    
+    public function validate($string, $config, $context) {
+        $string = $this->parseCDATA($string);
+        // we specifically will not support rgb() syntax with spaces
+        $bits = explode(' ', $string);
+        $done = array(); // segments we've finished
+        $ret = ''; // return value
+        foreach ($bits as $bit) {
+            foreach ($this->info as $propname => $validator) {
+                if (isset($done[$propname])) continue;
+                $r = $validator->validate($bit, $config, $context);
+                if ($r !== false) {
+                    $ret .= $r . ' ';
+                    $done[$propname] = true;
+                    break;
+                }
+            }
+        }
+        return rtrim($ret);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Color.php

@@ -0,0 +1,104 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'Core', 'ColorKeywords', array(
+        'maroon'    => '#800000',
+        'red'       => '#FF0000',
+        'orange'    => '#FFA500',
+        'yellow'    => '#FFFF00',
+        'olive'     => '#808000',
+        'purple'    => '#800080',
+        'fuchsia'   => '#FF00FF',
+        'white'     => '#FFFFFF',
+        'lime'      => '#00FF00',
+        'green'     => '#008000',
+        'navy'      => '#000080',
+        'blue'      => '#0000FF',
+        'aqua'      => '#00FFFF',
+        'teal'      => '#008080',
+        'black'     => '#000000',
+        'silver'    => '#C0C0C0',
+        'gray'      => '#808080'
+    ), 'hash', '
+Lookup array of color names to six digit hexadecimal number corresponding
+to color, with preceding hash mark. Used when parsing colors.
+This directive has been available since 2.0.0.
+');
+
+/**
+ * Validates Color as defined by CSS.
+ */
+class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($color, $config, $context) {
+        
+        static $colors = null;
+        if ($colors === null) $colors = $config->get('Core', 'ColorKeywords');
+        
+        $color = trim($color);
+        if ($color === '') return false;
+        
+        $lower = strtolower($color);
+        if (isset($colors[$lower])) return $colors[$lower];
+        
+        if (strpos($color, 'rgb(') !== false) {
+            // rgb literal handling
+            $length = strlen($color);
+            if (strpos($color, ')') !== $length - 1) return false;
+            $triad = substr($color, 4, $length - 4 - 1);
+            $parts = explode(',', $triad);
+            if (count($parts) !== 3) return false;
+            $type = false; // to ensure that they're all the same type
+            $new_parts = array();
+            foreach ($parts as $part) {
+                $part = trim($part);
+                if ($part === '') return false;
+                $length = strlen($part);
+                if ($part[$length - 1] === '%') {
+                    // handle percents
+                    if (!$type) {
+                        $type = 'percentage';
+                    } elseif ($type !== 'percentage') {
+                        return false;
+                    }
+                    $num = (float) substr($part, 0, $length - 1);
+                    if ($num < 0) $num = 0;
+                    if ($num > 100) $num = 100;
+                    $new_parts[] = "$num%";
+                } else {
+                    // handle integers
+                    if (!$type) {
+                        $type = 'integer';
+                    } elseif ($type !== 'integer') {
+                        return false;
+                    }
+                    $num = (int) $part;
+                    if ($num < 0) $num = 0;
+                    if ($num > 255) $num = 255;
+                    $new_parts[] = (string) $num;
+                }
+            }
+            $new_triad = implode(',', $new_parts);
+            $color = "rgb($new_triad)";
+        } else {
+            // hexadecimal handling
+            if ($color[0] === '#') {
+                $hex = substr($color, 1);
+            } else {
+                $hex = $color;
+                $color = '#' . $color;
+            }
+            $length = strlen($hex);
+            if ($length !== 3 && $length !== 6) return false;
+            if (!ctype_xdigit($hex)) return false;
+        }
+        
+        return $color;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Composite.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * Allows multiple validators to attempt to validate attribute.
+ * 
+ * Composite is just what it sounds like: a composite of many validators.
+ * This means that multiple HTMLPurifier_AttrDef objects will have a whack
+ * at the string.  If one of them passes, that's what is returned.  This is
+ * especially useful for CSS values, which often are a choice between
+ * an enumerated set of predefined values or a flexible data type.
+ */
+class HTMLPurifier_AttrDef_CSS_Composite extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * List of HTMLPurifier_AttrDef objects that may process strings
+     * @todo Make protected
+     */
+    public $defs;
+    
+    /**
+     * @param $defs List of HTMLPurifier_AttrDef objects
+     */
+    public function __construct($defs) {
+        $this->defs = $defs;
+    }
+    
+    public function validate($string, $config, $context) {
+        foreach ($this->defs as $i => $def) {
+            $result = $this->defs[$i]->validate($string, $config, $context);
+            if ($result !== false) return $result;
+        }
+        return false;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Filter.php

@@ -0,0 +1,55 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/Integer.php';
+
+/**
+ * Microsoft's proprietary filter: CSS property
+ * @note Currently supports the alpha filter. In the future, this will
+ *       probably need an extensible framework
+ */
+class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
+{
+    
+    protected $intValidator;
+    
+    public function __construct() {
+        $this->intValidator = new HTMLPurifier_AttrDef_Integer();
+    }
+    
+    public function validate($value, $config, $context) {
+        $value = $this->parseCDATA($value);
+        if ($value === 'none') return $value;
+        // if we looped this we could support multiple filters
+        $function_length = strcspn($value, '(');
+        $function = trim(substr($value, 0, $function_length));
+        if ($function !== 'alpha' &&
+            $function !== 'Alpha' &&
+            $function !== 'progid:DXImageTransform.Microsoft.Alpha'
+            ) return false;
+        $cursor = $function_length + 1;
+        $parameters_length = strcspn($value, ')', $cursor);
+        $parameters = substr($value, $cursor, $parameters_length);
+        $params = explode(',', $parameters);
+        $ret_params = array();
+        $lookup = array();
+        foreach ($params as $param) {
+            list($key, $value) = explode('=', $param);
+            $key   = trim($key);
+            $value = trim($value);
+            if (isset($lookup[$key])) continue;
+            if ($key !== 'opacity') continue;
+            $value = $this->intValidator->validate($value, $config, $context);
+            if ($value === false) continue;
+            $int = (int) $value;
+            if ($int > 100) $value = '100';
+            if ($int < 0) $value = '0';
+            $ret_params[] = "$key=$value";
+            $lookup[$key] = true;
+        }
+        $ret_parameters = implode(',', $ret_params);
+        $ret_function = "$function($ret_parameters)";
+        return $ret_function;
+    }
+    
+}

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Font.php

@@ -0,0 +1,150 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates shorthand CSS property font.
+ */
+class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Local copy of component validators.
+     * 
+     * @note If we moved specific CSS property definitions to their own
+     *       classes instead of having them be assembled at run time by
+     *       CSSDefinition, this wouldn't be necessary.  We'd instantiate
+     *       our own copies.
+     */
+    protected $info = array();
+    
+    public function __construct($config) {
+        $def = $config->getCSSDefinition();
+        $this->info['font-style']   = $def->info['font-style'];
+        $this->info['font-variant'] = $def->info['font-variant'];
+        $this->info['font-weight']  = $def->info['font-weight'];
+        $this->info['font-size']    = $def->info['font-size'];
+        $this->info['line-height']  = $def->info['line-height'];
+        $this->info['font-family']  = $def->info['font-family'];
+    }
+    
+    public function validate($string, $config, $context) {
+        
+        static $system_fonts = array(
+            'caption' => true,
+            'icon' => true,
+            'menu' => true,
+            'message-box' => true,
+            'small-caption' => true,
+            'status-bar' => true
+        );
+        
+        // regular pre-processing
+        $string = $this->parseCDATA($string);
+        if ($string === '') return false;
+        
+        // check if it's one of the keywords
+        $lowercase_string = strtolower($string);
+        if (isset($system_fonts[$lowercase_string])) {
+            return $lowercase_string;
+        }
+        
+        $bits = explode(' ', $string); // bits to process
+        $stage = 0; // this indicates what we're looking for
+        $caught = array(); // which stage 0 properties have we caught?
+        $stage_1 = array('font-style', 'font-variant', 'font-weight');
+        $final = ''; // output
+        
+        for ($i = 0, $size = count($bits); $i < $size; $i++) {
+            if ($bits[$i] === '') continue;
+            switch ($stage) {
+                
+                // attempting to catch font-style, font-variant or font-weight
+                case 0:
+                    foreach ($stage_1 as $validator_name) {
+                        if (isset($caught[$validator_name])) continue;
+                        $r = $this->info[$validator_name]->validate(
+                                                $bits[$i], $config, $context);
+                        if ($r !== false) {
+                            $final .= $r . ' ';
+                            $caught[$validator_name] = true;
+                            break;
+                        }
+                    }
+                    // all three caught, continue on
+                    if (count($caught) >= 3) $stage = 1;
+                    if ($r !== false) break;
+                
+                // attempting to catch font-size and perhaps line-height
+                case 1:
+                    $found_slash = false;
+                    if (strpos($bits[$i], '/') !== false) {
+                        list($font_size, $line_height) =
+                                                    explode('/', $bits[$i]);
+                        if ($line_height === '') {
+                            // ooh, there's a space after the slash!
+                            $line_height = false;
+                            $found_slash = true;
+                        }
+                    } else {
+                        $font_size = $bits[$i];
+                        $line_height = false;
+                    }
+                    $r = $this->info['font-size']->validate(
+                                              $font_size, $config, $context);
+                    if ($r !== false) {
+                        $final .= $r;
+                        // attempt to catch line-height
+                        if ($line_height === false) {
+                            // we need to scroll forward
+                            for ($j = $i + 1; $j < $size; $j++) {
+                                if ($bits[$j] === '') continue;
+                                if ($bits[$j] === '/') {
+                                    if ($found_slash) {
+                                        return false;
+                                    } else {
+                                        $found_slash = true;
+                                        continue;
+                                    }
+                                }
+                                $line_height = $bits[$j];
+                                break;
+                            }
+                        } else {
+                            // slash already found
+                            $found_slash = true;
+                            $j = $i;
+                        }
+                        if ($found_slash) {
+                            $i = $j;
+                            $r = $this->info['line-height']->validate(
+                                              $line_height, $config, $context);
+                            if ($r !== false) {
+                                $final .= '/' . $r;
+                            }
+                        }
+                        $final .= ' ';
+                        $stage = 2;
+                        break;
+                    }
+                    return false;
+                
+                // attempting to catch font-family
+                case 2:
+                    $font_family =
+                        implode(' ', array_slice($bits, $i, $size - $i));
+                    $r = $this->info['font-family']->validate(
+                                              $font_family, $config, $context);
+                    if ($r !== false) {
+                        $final .= $r . ' ';
+                        // processing completed successfully
+                        return rtrim($final);
+                    }
+                    return false;
+            }
+        }
+        return false;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/FontFamily.php

@@ -0,0 +1,66 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+// whitelisting allowed fonts would be nice
+
+/**
+ * Validates a font family list according to CSS spec
+ */
+class HTMLPurifier_AttrDef_CSS_FontFamily extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        static $generic_names = array(
+            'serif' => true,
+            'sans-serif' => true,
+            'monospace' => true,
+            'fantasy' => true,
+            'cursive' => true
+        );
+        
+        $string = $this->parseCDATA($string);
+        // assume that no font names contain commas in them
+        $fonts = explode(',', $string);
+        $final = '';
+        foreach($fonts as $font) {
+            $font = trim($font);
+            if ($font === '') continue;
+            // match a generic name
+            if (isset($generic_names[$font])) {
+                $final .= $font . ', ';
+                continue;
+            }
+            // match a quoted name
+            if ($font[0] === '"' || $font[0] === "'") {
+                $length = strlen($font);
+                if ($length <= 2) continue;
+                $quote = $font[0];
+                if ($font[$length - 1] !== $quote) continue;
+                $font = substr($font, 1, $length - 2);
+                // double-backslash processing is buggy
+                $font = str_replace("\\$quote", $quote, $font); // de-escape quote
+                $font = str_replace("\\\n", "\n", $font);       // de-escape newlines
+            }
+            // $font is a pure representation of the font name
+            
+            if (ctype_alnum($font)) {
+                // very simple font, allow it in unharmed
+                $final .= $font . ', ';
+                continue;
+            }
+            
+            // complicated font, requires quoting
+            
+            // armor single quotes and new lines
+            $font = str_replace("'", "\\'", $font);
+            $font = str_replace("\n", "\\\n", $font);
+            $final .= "'$font', ";
+        }
+        $final = rtrim($final, ', ');
+        if ($final === '') return false;
+        return $final;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Length.php

@@ -0,0 +1,55 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Number.php';
+
+/**
+ * Represents a Length as defined by CSS.
+ */
+class HTMLPurifier_AttrDef_CSS_Length extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Valid unit lookup table.
+     * @warning The code assumes all units are two characters long.  Be careful
+     *          if we have to change this behavior!
+     */
+    protected $units = array('em' => true, 'ex' => true, 'px' => true, 'in' => true,
+         'cm' => true, 'mm' => true, 'pt' => true, 'pc' => true);
+    /**
+     * Instance of HTMLPurifier_AttrDef_Number to defer number validation to
+     */
+    protected $number_def;
+    
+    /**
+     * @param $non_negative Bool indication whether or not negative values are
+     *                      allowed.
+     */
+    public function __construct($non_negative = false) {
+        $this->number_def = new HTMLPurifier_AttrDef_CSS_Number($non_negative);
+    }
+    
+    public function validate($length, $config, $context) {
+        
+        $length = $this->parseCDATA($length);
+        if ($length === '') return false;
+        if ($length === '0') return '0';
+        $strlen = strlen($length);
+        if ($strlen === 1) return false; // impossible!
+        
+        // we assume all units are two characters
+        $unit = substr($length, $strlen - 2);
+        if (!ctype_lower($unit)) $unit = strtolower($unit);
+        $number = substr($length, 0, $strlen - 2);
+        
+        if (!isset($this->units[$unit])) return false;
+        
+        $number = $this->number_def->validate($number, $config, $context);
+        if ($number === false) return false;
+        
+        return $number . $unit;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/ListStyle.php

@@ -0,0 +1,79 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates shorthand CSS property list-style.
+ * @warning Does not support url tokens that have internal spaces.
+ */
+class HTMLPurifier_AttrDef_CSS_ListStyle extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Local copy of component validators.
+     * @note See HTMLPurifier_AttrDef_CSS_Font::$info for a similar impl.
+     */
+    protected $info;
+    
+    public function __construct($config) {
+        $def = $config->getCSSDefinition();
+        $this->info['list-style-type']     = $def->info['list-style-type'];
+        $this->info['list-style-position'] = $def->info['list-style-position'];
+        $this->info['list-style-image'] = $def->info['list-style-image'];
+    }
+    
+    public function validate($string, $config, $context) {
+        
+        // regular pre-processing
+        $string = $this->parseCDATA($string);
+        if ($string === '') return false;
+        
+        // assumes URI doesn't have spaces in it
+        $bits = explode(' ', strtolower($string)); // bits to process
+        
+        $caught = array();
+        $caught['type']     = false;
+        $caught['position'] = false;
+        $caught['image']    = false;
+        
+        $i = 0; // number of catches
+        $none = false;
+        
+        foreach ($bits as $bit) {
+            if ($i >= 3) return; // optimization bit
+            if ($bit === '') continue;
+            foreach ($caught as $key => $status) {
+                if ($status !== false) continue;
+                $r = $this->info['list-style-' . $key]->validate($bit, $config, $context);
+                if ($r === false) continue;
+                if ($r === 'none') {
+                    if ($none) continue;
+                    else $none = true;
+                    if ($key == 'image') continue;
+                }
+                $caught[$key] = $r;
+                $i++;
+                break;
+            }
+        }
+        
+        if (!$i) return false;
+        
+        $ret = array();
+        
+        // construct type
+        if ($caught['type']) $ret[] = $caught['type'];
+        
+        // construct image
+        if ($caught['image']) $ret[] = $caught['image'];
+        
+        // construct position
+        if ($caught['position']) $ret[] = $caught['position'];
+        
+        if (empty($ret)) return false;
+        return implode(' ', $ret);
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Multiple.php

@@ -0,0 +1,59 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Framework class for strings that involve multiple values.
+ * 
+ * Certain CSS properties such as border-width and margin allow multiple
+ * lengths to be specified.  This class can take a vanilla border-width
+ * definition and multiply it, usually into a max of four.
+ * 
+ * @note Even though the CSS specification isn't clear about it, inherit
+ *       can only be used alone: it will never manifest as part of a multi
+ *       shorthand declaration.  Thus, this class does not allow inherit.
+ */
+class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Instance of component definition to defer validation to.
+     * @todo Make protected
+     */
+    public $single;
+    
+    /**
+     * Max number of values allowed.
+     * @todo Make protected
+     */
+    public $max;
+    
+    /**
+     * @param $single HTMLPurifier_AttrDef to multiply
+     * @param $max Max number of values allowed (usually four)
+     */
+    public function __construct($single, $max = 4) {
+        $this->single = $single;
+        $this->max = $max;
+    }
+    
+    public function validate($string, $config, $context) {
+        $string = $this->parseCDATA($string);
+        if ($string === '') return false;
+        $parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
+        $length = count($parts);
+        $final = '';
+        for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
+            if (ctype_space($parts[$i])) continue;
+            $result = $this->single->validate($parts[$i], $config, $context);
+            if ($result !== false) {
+                $final .= $result . ' ';
+                $num++;
+            }
+        }
+        if ($final === '') return false;
+        return rtrim($final);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Number.php

@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * Validates a number as defined by the CSS spec.
+ */
+class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Bool indicating whether or not only positive values allowed.
+     */
+    protected $non_negative = false;
+    
+    /**
+     * @param $non_negative Bool indicating whether negatives are forbidden
+     */
+    public function __construct($non_negative = false) {
+        $this->non_negative = $non_negative;
+    }
+    
+    public function validate($number, $config, $context) {
+        
+        $number = $this->parseCDATA($number);
+        
+        if ($number === '') return false;
+        if ($number === '0') return '0';
+        
+        $sign = '';
+        switch ($number[0]) {
+            case '-':
+                if ($this->non_negative) return false;
+                $sign = '-';
+            case '+':
+                $number = substr($number, 1);
+        }
+        
+        if (ctype_digit($number)) {
+            $number = ltrim($number, '0');
+            return $number ? $sign . $number : '0';
+        }
+        
+        // Period is the only non-numeric character allowed
+        if (strpos($number, '.') === false) return false;
+        
+        list($left, $right) = explode('.', $number, 2);
+        
+        if ($left === '' && $right === '') return false;
+        if ($left !== '' && !ctype_digit($left)) return false;
+        
+        $left  = ltrim($left,  '0');
+        $right = rtrim($right, '0');
+        
+        if ($right === '') {
+            return $left ? $sign . $left : '0';
+        } elseif (!ctype_digit($right)) {
+            return false;
+        }
+        
+        return $sign . $left . '.' . $right;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/Percentage.php

@@ -0,0 +1,42 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Number.php';
+
+/**
+ * Validates a Percentage as defined by the CSS spec.
+ */
+class HTMLPurifier_AttrDef_CSS_Percentage extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Instance of HTMLPurifier_AttrDef_CSS_Number to defer number validation
+     */
+    protected $number_def;
+    
+    /**
+     * @param Bool indicating whether to forbid negative values
+     */
+    public function __construct($non_negative = false) {
+        $this->number_def = new HTMLPurifier_AttrDef_CSS_Number($non_negative);
+    }
+    
+    public function validate($string, $config, $context) {
+        
+        $string = $this->parseCDATA($string);
+        
+        if ($string === '') return false;
+        $length = strlen($string);
+        if ($length === 1) return false;
+        if ($string[$length - 1] !== '%') return false;
+        
+        $number = substr($string, 0, $length - 1);
+        $number = $this->number_def->validate($number, $config, $context);
+        
+        if ($number === false) return false;
+        return "$number%";
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/TextDecoration.php

@@ -0,0 +1,36 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates the value for the CSS property text-decoration
+ * @note This class could be generalized into a version that acts sort of
+ *       like Enum except you can compound the allowed values.
+ */
+class HTMLPurifier_AttrDef_CSS_TextDecoration extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        
+        static $allowed_values = array(
+            'line-through' => true,
+            'overline' => true,
+            'underline' => true
+        );
+        
+        $string = strtolower($this->parseCDATA($string));
+        $parts = explode(' ', $string);
+        $final = '';
+        foreach ($parts as $part) {
+            if (isset($allowed_values[$part])) {
+                $final .= $part . ' ';
+            }
+        }
+        $final = rtrim($final);
+        if ($final === '') return false;
+        return $final;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/CSS/URI.php

@@ -0,0 +1,57 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef/URI.php';
+
+/**
+ * Validates a URI in CSS syntax, which uses url('http://example.com')
+ * @note While theoretically speaking a URI in a CSS document could
+ *       be non-embedded, as of CSS2 there is no such usage so we're
+ *       generalizing it. This may need to be changed in the future.
+ * @warning Since HTMLPurifier_AttrDef_CSS blindly uses semicolons as
+ *          the separator, you cannot put a literal semicolon in
+ *          in the URI. Try percent encoding it, in that case.
+ */
+class HTMLPurifier_AttrDef_CSS_URI extends HTMLPurifier_AttrDef_URI
+{
+    
+    public function __construct() {
+        parent::__construct(true); // always embedded
+    }
+    
+    public function validate($uri_string, $config, $context) {
+        // parse the URI out of the string and then pass it onto
+        // the parent object
+        
+        $uri_string = $this->parseCDATA($uri_string);
+        if (strpos($uri_string, 'url(') !== 0) return false;
+        $uri_string = substr($uri_string, 4);
+        $new_length = strlen($uri_string) - 1;
+        if ($uri_string[$new_length] != ')') return false;
+        $uri = trim(substr($uri_string, 0, $new_length));
+        
+        if (!empty($uri) && ($uri[0] == "'" || $uri[0] == '"')) {
+            $quote = $uri[0];
+            $new_length = strlen($uri) - 1;
+            if ($uri[$new_length] !== $quote) return false;
+            $uri = substr($uri, 1, $new_length - 1);
+        }
+        
+        $keys   = array(  '(',   ')',   ',',   ' ',   '"',   "'");
+        $values = array('\\(', '\\)', '\\,', '\\ ', '\\"', "\\'");
+        $uri = str_replace($values, $keys, $uri);
+        
+        $result = parent::validate($uri, $config, $context);
+        
+        if ($result === false) return false;
+        
+        // escape necessary characters according to CSS spec
+        // except for the comma, none of these should appear in the
+        // URI at all
+        $result = str_replace($keys, $values, $result);
+        
+        return "url($result)";
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/Enum.php

@@ -0,0 +1,66 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+// Enum = Enumerated
+/**
+ * Validates a keyword against a list of valid values.
+ * @warning The case-insensitive compare of this function uses PHP's
+ *          built-in strtolower and ctype_lower functions, which may
+ *          cause problems with international comparisons
+ */
+class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Lookup table of valid values.
+     * @todo Make protected
+     */
+    public $valid_values   = array();
+    
+    /**
+     * Bool indicating whether or not enumeration is case sensitive.
+     * @note In general this is always case insensitive.
+     */
+    protected $case_sensitive = false; // values according to W3C spec
+    
+    /**
+     * @param $valid_values List of valid values
+     * @param $case_sensitive Bool indicating whether or not case sensitive
+     */
+    public function __construct(
+        $valid_values = array(), $case_sensitive = false
+    ) {
+        $this->valid_values = array_flip($valid_values);
+        $this->case_sensitive = $case_sensitive;
+    }
+    
+    public function validate($string, $config, $context) {
+        $string = trim($string);
+        if (!$this->case_sensitive) {
+            // we may want to do full case-insensitive libraries
+            $string = ctype_lower($string) ? $string : strtolower($string);
+        }
+        $result = isset($this->valid_values[$string]);
+        
+        return $result ? $string : false;
+    }
+    
+    /**
+     * @param $string In form of comma-delimited list of case-insensitive
+     *      valid values. Example: "foo,bar,baz". Prepend "s:" to make
+     *      case sensitive
+     */
+    public function make($string) {
+        if (strlen($string) > 2 && $string[0] == 's' && $string[1] == ':') {
+            $string = substr($string, 2);
+            $sensitive = true;
+        } else {
+            $sensitive = false;
+        }
+        $values = explode(',', $string);
+        return new HTMLPurifier_AttrDef_Enum($values, $sensitive);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/Bool.php

@@ -0,0 +1,29 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates a boolean attribute
+ */
+class HTMLPurifier_AttrDef_HTML_Bool extends HTMLPurifier_AttrDef
+{
+    
+    protected $name;
+    public $minimized = true;
+    
+    public function __construct($name = false) {$this->name = $name;}
+    
+    public function validate($string, $config, $context) {
+        if (empty($string)) return false;
+        return $this->name;
+    }
+    
+    /**
+     * @param $string Name of attribute
+     */
+    public function make($string) {
+        return new HTMLPurifier_AttrDef_HTML_Bool($string);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/Color.php

@@ -0,0 +1,34 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Color.php'; // for %Core.ColorKeywords
+
+/**
+ * Validates a color according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        
+        static $colors = null;
+        if ($colors === null) $colors = $config->get('Core', 'ColorKeywords');
+        
+        $string = trim($string);
+        
+        if (empty($string)) return false;
+        if (isset($colors[$string])) return $colors[$string];
+        if ($string[0] === '#') $hex = substr($string, 1);
+        else $hex = $string;
+        
+        $length = strlen($hex);
+        if ($length !== 3 && $length !== 6) return false;
+        if (!ctype_xdigit($hex)) return false;
+        if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
+        
+        return "#$hex";
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/FrameTarget.php

@@ -0,0 +1,33 @@
+<?php
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'AllowedFrameTargets', array(), 'lookup',
+    'Lookup table of all allowed link frame targets.  Some commonly used '.
+    'link targets include _blank, _self, _parent and _top. Values should '.
+    'be lowercase, as validation will be done in a case-sensitive manner '.
+    'despite W3C\'s recommendation. XHTML 1.0 Strict does not permit '.
+    'the target attribute so this directive will have no effect in that '.
+    'doctype. XHTML 1.1 does not enable the Target module by default, you '.
+    'will have to manually enable it (see the module documentation for more details.)'
+);
+
+require_once 'HTMLPurifier/AttrDef/Enum.php';
+
+/**
+ * Special-case enum attribute definition that lazy loads allowed frame targets
+ */
+class HTMLPurifier_AttrDef_HTML_FrameTarget extends HTMLPurifier_AttrDef_Enum
+{
+    
+    public $valid_values = false; // uninitialized value
+    protected $case_sensitive = false;
+    
+    public function __construct() {}
+    
+    public function validate($string, $config, $context) {
+        if ($this->valid_values === false) $this->valid_values = $config->get('Attr', 'AllowedFrameTargets');
+        return parent::validate($string, $config, $context);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/ID.php

@@ -0,0 +1,120 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/IDAccumulator.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'EnableID', false, 'bool',
+    'Allows the ID attribute in HTML.  This is disabled by default '.
+    'due to the fact that without proper configuration user input can '.
+    'easily break the validation of a webpage by specifying an ID that is '.
+    'already on the surrounding HTML.  If you don\'t mind throwing caution to '.
+    'the wind, enable this directive, but I strongly recommend you also '.
+    'consider blacklisting IDs you use (%Attr.IDBlacklist) or prefixing all '.
+    'user supplied IDs (%Attr.IDPrefix).  This directive has been available '.
+    'since 1.2.0, and when set to true reverts to the behavior of pre-1.2.0 '.
+    'versions.'
+);
+HTMLPurifier_ConfigSchema::defineAlias(
+    'HTML', 'EnableAttrID', 'Attr', 'EnableID'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'IDPrefix', '', 'string',
+    'String to prefix to IDs.  If you have no idea what IDs your pages '.
+    'may use, you may opt to simply add a prefix to all user-submitted ID '.
+    'attributes so that they are still usable, but will not conflict with '.
+    'core page IDs. Example: setting the directive to \'user_\' will result in '.
+    'a user submitted \'foo\' to become \'user_foo\'  Be sure to set '.
+    '%HTML.EnableAttrID to true before using '.
+    'this.  This directive was available since 1.2.0.'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'IDPrefixLocal', '', 'string',
+    'Temporary prefix for IDs used in conjunction with %Attr.IDPrefix.  If '.
+    'you need to allow multiple sets of '.
+    'user content on web page, you may need to have a seperate prefix that '.
+    'changes with each iteration.  This way, seperately submitted user content '.
+    'displayed on the same page doesn\'t clobber each other. Ideal values '.
+    'are unique identifiers for the content it represents (i.e. the id of '.
+    'the row in the database). Be sure to add a seperator (like an underscore) '.
+    'at the end.  Warning: this directive will not work unless %Attr.IDPrefix '.
+    'is set to a non-empty value! This directive was available since 1.2.0.'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'IDBlacklistRegexp', null, 'string/null',
+    'PCRE regular expression to be matched against all IDs. If the expression '.
+    'is matches, the ID is rejected. Use this with care: may cause '.
+    'significant degradation. ID matching is done after all other '.
+    'validation. This directive was available since 1.6.0.'
+);
+
+/**
+ * Validates the HTML attribute ID.
+ * @warning Even though this is the id processor, it
+ *          will ignore the directive Attr:IDBlacklist, since it will only
+ *          go according to the ID accumulator. Since the accumulator is
+ *          automatically generated, it will have already absorbed the
+ *          blacklist. If you're hacking around, make sure you use load()!
+ */
+
+class HTMLPurifier_AttrDef_HTML_ID extends HTMLPurifier_AttrDef
+{
+    
+    // ref functionality disabled, since we also have to verify
+    // whether or not the ID it refers to exists
+    
+    public function validate($id, $config, $context) {
+        
+        if (!$config->get('Attr', 'EnableID')) return false;
+        
+        $id = trim($id); // trim it first
+        
+        if ($id === '') return false;
+        
+        $prefix = $config->get('Attr', 'IDPrefix');
+        if ($prefix !== '') {
+            $prefix .= $config->get('Attr', 'IDPrefixLocal');
+            // prevent re-appending the prefix
+            if (strpos($id, $prefix) !== 0) $id = $prefix . $id;
+        } elseif ($config->get('Attr', 'IDPrefixLocal') !== '') {
+            trigger_error('%Attr.IDPrefixLocal cannot be used unless '.
+                '%Attr.IDPrefix is set', E_USER_WARNING);
+        }
+        
+        //if (!$this->ref) {
+            $id_accumulator =& $context->get('IDAccumulator');
+            if (isset($id_accumulator->ids[$id])) return false;
+        //}
+        
+        // we purposely avoid using regex, hopefully this is faster
+        
+        if (ctype_alpha($id)) {
+            $result = true;
+        } else {
+            if (!ctype_alpha(@$id[0])) return false;
+            $trim = trim( // primitive style of regexps, I suppose
+                $id,
+                'A..Za..z0..9:-._'
+              );
+            $result = ($trim === '');
+        }
+        
+        $regexp = $config->get('Attr', 'IDBlacklistRegexp');
+        if ($regexp && preg_match($regexp, $id)) {
+            return false;
+        }
+        
+        if (/*!$this->ref && */$result) $id_accumulator->add($id);
+        
+        // if no change was made to the ID, return the result
+        // else, return the new id if stripping whitespace made it
+        //     valid, or return false.
+        return $result ? $id : false;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/Length.php

@@ -0,0 +1,43 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Pixels.php';
+
+/**
+ * Validates the HTML type length (not to be confused with CSS's length).
+ * 
+ * This accepts integer pixels or percentages as lengths for certain
+ * HTML attributes.
+ */
+
+class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
+{
+    
+    public function validate($string, $config, $context) {
+        
+        $string = trim($string);
+        if ($string === '') return false;
+        
+        $parent_result = parent::validate($string, $config, $context);
+        if ($parent_result !== false) return $parent_result;
+        
+        $length = strlen($string);
+        $last_char = $string[$length - 1];
+        
+        if ($last_char !== '%') return false;
+        
+        $points = substr($string, 0, $length - 1);
+        
+        if (!is_numeric($points)) return false;
+        
+        $points = (int) $points;
+        
+        if ($points < 0) return '0%';
+        if ($points > 100) return '100%';
+        
+        return ((string) $points) . '%';
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php

@@ -0,0 +1,72 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'AllowedRel', array(), 'lookup',
+    'List of allowed forward document relationships in the rel attribute. '.
+    'Common values may be nofollow or print. By default, this is empty, '.
+    'meaning that no document relationships are allowed. This directive '.
+    'was available since 1.6.0.'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'AllowedRev', array(), 'lookup',
+    'List of allowed reverse document relationships in the rev attribute. '.
+    'This attribute is a bit of an edge-case; if you don\'t know what it '.
+    'is for, stay away. This directive was available since 1.6.0.'
+);
+
+/**
+ * Validates a rel/rev link attribute against a directive of allowed values
+ * @note We cannot use Enum because link types allow multiple
+ *       values.
+ * @note Assumes link types are ASCII text
+ */
+class HTMLPurifier_AttrDef_HTML_LinkTypes extends HTMLPurifier_AttrDef
+{
+    
+    /** Name config attribute to pull. */
+    protected $name;
+    
+    public function __construct($name) {
+        $configLookup = array(
+            'rel' => 'AllowedRel',
+            'rev' => 'AllowedRev'
+        );
+        if (!isset($configLookup[$name])) {
+            trigger_error('Unrecognized attribute name for link '.
+                'relationship.', E_USER_ERROR);
+            return;
+        }
+        $this->name = $configLookup[$name];
+    }
+    
+    public function validate($string, $config, $context) {
+        
+        $allowed = $config->get('Attr', $this->name);
+        if (empty($allowed)) return false;
+        
+        $string = $this->parseCDATA($string);
+        $parts = explode(' ', $string);
+        
+        // lookup to prevent duplicates
+        $ret_lookup = array();
+        foreach ($parts as $part) {
+            $part = strtolower(trim($part));
+            if (!isset($allowed[$part])) continue;
+            $ret_lookup[$part] = true;
+        }
+        
+        if (empty($ret_lookup)) return false;
+        
+        $ret_array = array();
+        foreach ($ret_lookup as $part => $bool) $ret_array[] = $part;
+        $string = implode(' ', $ret_array);
+        
+        return $string;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/MultiLength.php

@@ -0,0 +1,43 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Length.php';
+
+/**
+ * Validates a MultiLength as defined by the HTML spec.
+ * 
+ * A multilength is either a integer (pixel count), a percentage, or
+ * a relative number.
+ */
+class HTMLPurifier_AttrDef_HTML_MultiLength extends HTMLPurifier_AttrDef_HTML_Length
+{
+    
+    public function validate($string, $config, $context) {
+        
+        $string = trim($string);
+        if ($string === '') return false;
+        
+        $parent_result = parent::validate($string, $config, $context);
+        if ($parent_result !== false) return $parent_result;
+        
+        $length = strlen($string);
+        $last_char = $string[$length - 1];
+        
+        if ($last_char !== '*') return false;
+        
+        $int = substr($string, 0, $length - 1);
+        
+        if ($int == '') return '*';
+        if (!is_numeric($int)) return false;
+        
+        $int = (int) $int;
+        
+        if ($int < 0) return false;
+        if ($int == 0) return '0';
+        if ($int == 1) return '*';
+        return ((string) $int) . '*';
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/Nmtokens.php

@@ -0,0 +1,50 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/Config.php';
+
+/**
+ * Validates contents based on NMTOKENS attribute type.
+ * @note The only current use for this is the class attribute in HTML
+ * @note Could have some functionality factored out into Nmtoken class
+ * @warning We cannot assume this class will be used only for 'class'
+ *          attributes. Not sure how to hook in magic behavior, then.
+ */
+class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        
+        $string = trim($string);
+        
+        // early abort: '' and '0' (strings that convert to false) are invalid
+        if (!$string) return false;
+        
+        // OPTIMIZABLE!
+        // do the preg_match, capture all subpatterns for reformulation
+        
+        // we don't support U+00A1 and up codepoints or
+        // escaping because I don't know how to do that with regexps
+        // and plus it would complicate optimization efforts (you never
+        // see that anyway).
+        $matches = array();
+        $pattern = '/(?:(?<=\s)|\A)'. // look behind for space or string start
+                   '((?:--|-?[A-Za-z_])[A-Za-z_\-0-9]*)'.
+                   '(?:(?=\s)|\z)/'; // look ahead for space or string end
+        preg_match_all($pattern, $string, $matches);
+        
+        if (empty($matches[1])) return false;
+        
+        // reconstruct string
+        $new_string = '';
+        foreach ($matches[1] as $token) {
+            $new_string .= $token . ' ';
+        }
+        $new_string = rtrim($new_string);
+        
+        return $new_string;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/HTML/Pixels.php

@@ -0,0 +1,36 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates an integer representation of pixels according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        
+        $string = trim($string);
+        if ($string === '0') return $string;
+        if ($string === '')  return false;
+        $length = strlen($string);
+        if (substr($string, $length - 2) == 'px') {
+            $string = substr($string, 0, $length - 2);
+        }
+        if (!is_numeric($string)) return false;
+        $int = (int) $string;
+        
+        if ($int < 0) return '0';
+        
+        // upper-bound value, extremely high values can
+        // crash operating systems, see <http://ha.ckers.org/imagecrash.html>
+        // WARNING, above link WILL crash you if you're using Windows
+        
+        if ($int > 1200) return '1200';
+        
+        return (string) $int;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/Integer.php

@@ -0,0 +1,74 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates an integer.
+ * @note While this class was modeled off the CSS definition, no currently
+ *       allowed CSS uses this type.  The properties that do are: widows,
+ *       orphans, z-index, counter-increment, counter-reset.  Some of the
+ *       HTML attributes, however, find use for a non-negative version of this.
+ */
+class HTMLPurifier_AttrDef_Integer extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Bool indicating whether or not negative values are allowed
+     */
+    protected $negative = true;
+    
+    /**
+     * Bool indicating whether or not zero is allowed
+     */
+    protected $zero = true;
+    
+    /**
+     * Bool indicating whether or not positive values are allowed
+     */
+    protected $positive = true;
+    
+    /**
+     * @param $negative Bool indicating whether or not negative values are allowed
+     * @param $zero Bool indicating whether or not zero is allowed
+     * @param $positive Bool indicating whether or not positive values are allowed
+     */
+    public function __construct(
+        $negative = true, $zero = true, $positive = true
+    ) {
+        $this->negative = $negative;
+        $this->zero     = $zero;
+        $this->positive = $positive;
+    }
+    
+    public function validate($integer, $config, $context) {
+        
+        $integer = $this->parseCDATA($integer);
+        if ($integer === '') return false;
+        
+        // we could possibly simply typecast it to integer, but there are
+        // certain fringe cases that must not return an integer.
+        
+        // clip leading sign
+        if ( $this->negative && $integer[0] === '-' ) {
+            $digits = substr($integer, 1);
+            if ($digits === '0') $integer = '0'; // rm minus sign for zero
+        } elseif( $this->positive && $integer[0] === '+' ) {
+            $digits = $integer = substr($integer, 1); // rm unnecessary plus
+        } else {
+            $digits = $integer;
+        }
+        
+        // test if it's numeric
+        if (!ctype_digit($digits)) return false;
+        
+        // perform scope tests
+        if (!$this->zero     && $integer == 0) return false;
+        if (!$this->positive && $integer > 0) return false;
+        if (!$this->negative && $integer < 0) return false;
+        
+        return $integer;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/Lang.php

@@ -0,0 +1,74 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates the HTML attribute lang, effectively a language code.
+ * @note Built according to RFC 3066, which obsoleted RFC 1766
+ */
+class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        
+        $string = trim($string);
+        if (!$string) return false;
+        
+        $subtags = explode('-', $string);
+        $num_subtags = count($subtags);
+        
+        if ($num_subtags == 0) return false; // sanity check
+        
+        // process primary subtag : $subtags[0]
+        $length = strlen($subtags[0]);
+        switch ($length) {
+            case 0:
+                return false;
+            case 1:
+                if (! ($subtags[0] == 'x' || $subtags[0] == 'i') ) {
+                    return false;
+                }
+                break;
+            case 2:
+            case 3:
+                if (! ctype_alpha($subtags[0]) ) {
+                    return false;
+                } elseif (! ctype_lower($subtags[0]) ) {
+                    $subtags[0] = strtolower($subtags[0]);
+                }
+                break;
+            default:
+                return false;
+        }
+        
+        $new_string = $subtags[0];
+        if ($num_subtags == 1) return $new_string;
+        
+        // process second subtag : $subtags[1]
+        $length = strlen($subtags[1]);
+        if ($length == 0 || ($length == 1 && $subtags[1] != 'x') || $length > 8 || !ctype_alnum($subtags[1])) {
+            return $new_string;
+        }
+        if (!ctype_lower($subtags[1])) $subtags[1] = strtolower($subtags[1]);
+        
+        $new_string .= '-' . $subtags[1];
+        if ($num_subtags == 2) return $new_string;
+        
+        // process all other subtags, index 2 and up
+        for ($i = 2; $i < $num_subtags; $i++) {
+            $length = strlen($subtags[$i]);
+            if ($length == 0 || $length > 8 || !ctype_alnum($subtags[$i])) {
+                return $new_string;
+            }
+            if (!ctype_lower($subtags[$i])) {
+                $subtags[$i] = strtolower($subtags[$i]);
+            }
+            $new_string .= '-' . $subtags[$i];
+        }
+        
+        return $new_string;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/Text.php

@@ -0,0 +1,16 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates arbitrary text according to the HTML spec.
+ */
+class HTMLPurifier_AttrDef_Text extends HTMLPurifier_AttrDef
+{
+    
+    public function validate($string, $config, $context) {
+        return $this->parseCDATA($string);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/URI.php

@@ -0,0 +1,150 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/URIParser.php';
+require_once 'HTMLPurifier/URIScheme.php';
+require_once 'HTMLPurifier/URISchemeRegistry.php';
+require_once 'HTMLPurifier/AttrDef/URI/Host.php';
+require_once 'HTMLPurifier/PercentEncoder.php';
+require_once 'HTMLPurifier/AttrDef/URI/Email.php';
+
+// special case filtering directives 
+
+HTMLPurifier_ConfigSchema::define(
+    'URI', 'Munge', null, 'string/null', '
+<p>
+    Munges all browsable (usually http, https and ftp)
+    absolute URI\'s into another URI, usually a URI redirection service.
+    This directive accepts a URI, formatted with a <code>%s</code> where 
+    the url-encoded original URI should be inserted (sample: 
+    <code>http://www.google.com/url?q=%s</code>).
+</p>
+<p>
+    Uses for this directive:
+</p>
+<ul>
+    <li>
+        Prevent PageRank leaks, while being fairly transparent 
+        to users (you may also want to add some client side JavaScript to 
+        override the text in the statusbar). <strong>Notice</strong>:
+        Many security experts believe that this form of protection does not deter spam-bots. 
+    </li>
+    <li>
+        Redirect users to a splash page telling them they are leaving your
+        website. While this is poor usability practice, it is often mandated
+        in corporate environments.
+    </li>
+</ul>
+<p>
+    This directive has been available since 1.3.0.
+</p>
+');
+
+// disabling directives
+
+HTMLPurifier_ConfigSchema::define(
+    'URI', 'Disable', false, 'bool', '
+<p>
+    Disables all URIs in all forms. Not sure why you\'d want to do that 
+    (after all, the Internet\'s founded on the notion of a hyperlink). 
+    This directive has been available since 1.3.0.
+</p>
+');
+HTMLPurifier_ConfigSchema::defineAlias('Attr', 'DisableURI', 'URI', 'Disable');
+
+HTMLPurifier_ConfigSchema::define(
+    'URI', 'DisableResources', false, 'bool', '
+<p>
+    Disables embedding resources, essentially meaning no pictures. You can 
+    still link to them though. See %URI.DisableExternalResources for why 
+    this might be a good idea. This directive has been available since 1.3.0.
+</p>
+');
+
+/**
+ * Validates a URI as defined by RFC 3986.
+ * @note Scheme-specific mechanics deferred to HTMLPurifier_URIScheme
+ */
+class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
+{
+    
+    protected $parser, $percentEncoder;
+    protected $embedsResource;
+    
+    /**
+     * @param $embeds_resource_resource Does the URI here result in an extra HTTP request?
+     */
+    public function __construct($embeds_resource = false) {
+        $this->parser = new HTMLPurifier_URIParser();
+        $this->percentEncoder = new HTMLPurifier_PercentEncoder();
+        $this->embedsResource = (bool) $embeds_resource;
+    }
+    
+    public function validate($uri, $config, $context) {
+        
+        if ($config->get('URI', 'Disable')) return false;
+        
+        // initial operations
+        $uri = $this->parseCDATA($uri);
+        $uri = $this->percentEncoder->normalize($uri);
+        
+        // parse the URI
+        $uri = $this->parser->parse($uri);
+        if ($uri === false) return false;
+        
+        // add embedded flag to context for validators
+        $context->register('EmbeddedURI', $this->embedsResource); 
+        
+        $ok = false;
+        do {
+            
+            // generic validation
+            $result = $uri->validate($config, $context);
+            if (!$result) break;
+            
+            // chained filtering
+            $uri_def =& $config->getDefinition('URI');
+            $result = $uri_def->filter($uri, $config, $context);
+            if (!$result) break;
+            
+            // scheme-specific validation 
+            $scheme_obj = $uri->getSchemeObj($config, $context);
+            if (!$scheme_obj) break;
+            if ($this->embedsResource && !$scheme_obj->browsable) break;
+            $result = $scheme_obj->validate($uri, $config, $context);
+            if (!$result) break;
+            
+            // survived gauntlet
+            $ok = true;
+            
+        } while (false);
+        
+        $context->destroy('EmbeddedURI');
+        if (!$ok) return false;
+        
+        // munge scheme off if necessary (this must be last)
+        if (!is_null($uri->scheme) && is_null($uri->host)) {
+            if ($uri_def->defaultScheme == $uri->scheme) {
+                $uri->scheme = null;
+            }
+        }
+        
+        // back to string
+        $result = $uri->toString();
+        
+        // munge entire URI if necessary
+        if (
+            !is_null($uri->host) && // indicator for authority
+            !empty($scheme_obj->browsable) &&
+            !is_null($munge = $config->get('URI', 'Munge'))
+        ) {
+            $result = str_replace('%s', rawurlencode($result), $munge);
+        }
+        
+        return $result;
+        
+    }
+    
+}
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/URI/Email.php

@@ -0,0 +1,18 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+abstract class HTMLPurifier_AttrDef_URI_Email extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Unpacks a mailbox into its display-name and address
+     */
+    function unpack($string) {
+        // needs to be implemented
+    }
+    
+}
+
+// sub-implementations
+require_once 'HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php';

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php

@@ -0,0 +1,22 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef/URI/Email.php';
+
+/**
+ * Primitive email validation class based on the regexp found at 
+ * http://www.regular-expressions.info/email.html
+ */
+class HTMLPurifier_AttrDef_URI_Email_SimpleCheck extends HTMLPurifier_AttrDef_URI_Email
+{
+    
+    public function validate($string, $config, $context) {
+        // no support for named mailboxes i.e. "Bob <bob@example.com>"
+        // that needs more percent encoding to be done
+        if ($string == '') return false;
+        $string = trim($string);
+        $result = preg_match('/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i', $string);
+        return $result ? $string : false;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/URI/Host.php

@@ -0,0 +1,53 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+require_once 'HTMLPurifier/AttrDef/URI/IPv4.php';
+require_once 'HTMLPurifier/AttrDef/URI/IPv6.php';
+
+/**
+ * Validates a host according to the IPv4, IPv6 and DNS (future) specifications.
+ */
+class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * Instance of HTMLPurifier_AttrDef_URI_IPv4 sub-validator
+     */
+    protected $ipv4;
+    
+    /**
+     * Instance of HTMLPurifier_AttrDef_URI_IPv6 sub-validator
+     */
+    protected $ipv6;
+    
+    public function __construct() {
+        $this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
+        $this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
+    }
+    
+    public function validate($string, $config, $context) {
+        $length = strlen($string);
+        if ($string === '') return '';
+        if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
+            //IPv6
+            $ip = substr($string, 1, $length - 2);
+            $valid = $this->ipv6->validate($ip, $config, $context);
+            if ($valid === false) return false;
+            return '['. $valid . ']';
+        }
+        
+        // need to do checks on unusual encodings too
+        $ipv4 = $this->ipv4->validate($string, $config, $context);
+        if ($ipv4 !== false) return $ipv4;
+        
+        // validate a domain name here, do filtering, etc etc etc
+        
+        // We could use this, but it would break I18N domain names
+        //$match = preg_match('/^[a-z0-9][\w\-\.]*[a-z0-9]$/i', $string);
+        //if (!$match) return false;
+        
+        return $string;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/URI/IPv4.php

@@ -0,0 +1,40 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates an IPv4 address
+ * @author Feyd @ forums.devnetwork.net (public domain)
+ */
+class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * IPv4 regex, protected so that IPv6 can reuse it
+     */
+    protected $ip4;
+    
+    public function validate($aIP, $config, $context) {
+        
+        if (!$this->ip4) $this->_loadRegex();
+        
+        if (preg_match('#^' . $this->ip4 . '$#s', $aIP))
+        {
+                return $aIP;
+        }
+        
+        return false;
+        
+    }
+    
+    /**
+     * Lazy load function to prevent regex from being stuffed in
+     * cache.
+     */
+    protected function _loadRegex() {
+        $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
+        $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrDef/URI/IPv6.php

@@ -0,0 +1,100 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef/URI/IPv4.php';
+
+/**
+ * Validates an IPv6 address.
+ * @author Feyd @ forums.devnetwork.net (public domain)
+ * @note This function requires brackets to have been removed from address
+ *       in URI.
+ */
+class HTMLPurifier_AttrDef_URI_IPv6 extends HTMLPurifier_AttrDef_URI_IPv4
+{
+    
+    public function validate($aIP, $config, $context) {
+        
+        if (!$this->ip4) $this->_loadRegex();
+        
+        $original = $aIP;
+        
+        $hex = '[0-9a-fA-F]';
+        $blk = '(?:' . $hex . '{1,4})';
+        $pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))';   // /0 - /128
+        
+        //      prefix check
+        if (strpos($aIP, '/') !== false)
+        {
+                if (preg_match('#' . $pre . '$#s', $aIP, $find))
+                {
+                        $aIP = substr($aIP, 0, 0-strlen($find[0]));
+                        unset($find);
+                }
+                else
+                {
+                        return false;
+                }
+        }
+        
+        //      IPv4-compatiblity check       
+        if (preg_match('#(?<=:'.')' . $this->ip4 . '$#s', $aIP, $find))
+        {
+                $aIP = substr($aIP, 0, 0-strlen($find[0]));
+                $ip = explode('.', $find[0]);
+                $ip = array_map('dechex', $ip);
+                $aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
+                unset($find, $ip);
+        }
+        
+        //      compression check
+        $aIP = explode('::', $aIP);
+        $c = count($aIP);
+        if ($c > 2)
+        {
+                return false;
+        }
+        elseif ($c == 2)
+        {
+                list($first, $second) = $aIP;
+                $first = explode(':', $first);
+                $second = explode(':', $second);
+               
+                if (count($first) + count($second) > 8)
+                {
+                        return false;
+                }
+               
+                while(count($first) < 8)
+                {
+                        array_push($first, '0');
+                }
+
+                array_splice($first, 8 - count($second), 8, $second);
+                $aIP = $first;
+                unset($first,$second);
+        }
+        else
+        {
+                $aIP = explode(':', $aIP[0]);
+        }
+        $c = count($aIP);
+        
+        if ($c != 8)
+        {
+                return false;
+        }
+       
+        //      All the pieces should be 16-bit hex strings. Are they?
+        foreach ($aIP as $piece)
+        {
+                if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece)))
+                {
+                        return false;
+                }
+        }
+        
+        return $original;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Processes an entire attribute array for corrections needing multiple values.
+ * 
+ * Occasionally, a certain attribute will need to be removed and popped onto
+ * another value.  Instead of creating a complex return syntax for
+ * HTMLPurifier_AttrDef, we just pass the whole attribute array to a
+ * specialized object and have that do the special work.  That is the
+ * family of HTMLPurifier_AttrTransform.
+ * 
+ * An attribute transformation can be assigned to run before or after
+ * HTMLPurifier_AttrDef validation.  See HTMLPurifier_HTMLDefinition for
+ * more details.
+ */
+
+abstract class HTMLPurifier_AttrTransform
+{
+    
+    /**
+     * Abstract: makes changes to the attributes dependent on multiple values.
+     * 
+     * @param $attr Assoc array of attributes, usually from
+     *              HTMLPurifier_Token_Tag::$attr
+     * @param $config Mandatory HTMLPurifier_Config object.
+     * @param $context Mandatory HTMLPurifier_Context object
+     * @returns Processed attribute array.
+     */
+    abstract public function transform($attr, $config, $context);
+    
+    /**
+     * Prepends CSS properties to the style attribute, creating the
+     * attribute if it doesn't exist.
+     * @param $attr Attribute array to process (passed by reference)
+     * @param $css CSS to prepend
+     */
+    public function prependCSS(&$attr, $css) {
+        $attr['style'] = isset($attr['style']) ? $attr['style'] : '';
+        $attr['style'] = $css . $attr['style'];
+    }
+    
+    /**
+     * Retrieves and removes an attribute
+     * @param $attr Attribute array to process (passed by reference)
+     * @param $key Key of attribute to confiscate
+     */
+    public function confiscateAttr(&$attr, $key) {
+        if (!isset($attr[$key])) return null;
+        $value = $attr[$key];
+        unset($attr[$key]);
+        return $value;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/BdoDir.php

@@ -0,0 +1,30 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+// this MUST be placed in post, as it assumes that any value in dir is valid
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'DefaultTextDir', 'ltr', 'string',
+    'Defines the default text direction (ltr or rtl) of the document '.
+    'being parsed.  This generally is the same as the value of the dir '.
+    'attribute in HTML, or ltr if that is not specified.'
+);
+HTMLPurifier_ConfigSchema::defineAllowedValues(
+    'Attr', 'DefaultTextDir', array( 'ltr', 'rtl' )
+);
+
+/**
+ * Post-trasnform that ensures that bdo tags have the dir attribute set.
+ */
+class HTMLPurifier_AttrTransform_BdoDir extends HTMLPurifier_AttrTransform
+{
+    
+    public function transform($attr, $config, $context) {
+        if (isset($attr['dir'])) return $attr;
+        $attr['dir'] = $config->get('Attr', 'DefaultTextDir');
+        return $attr;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/BgColor.php

@@ -0,0 +1,24 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Pre-transform that changes deprecated bgcolor attribute to CSS.
+ */
+class HTMLPurifier_AttrTransform_BgColor extends HTMLPurifier_AttrTransform {
+
+    public function transform($attr, $config, $context) {
+        
+        if (!isset($attr['bgcolor'])) return $attr;
+        
+        $bgcolor = $this->confiscateAttr($attr, 'bgcolor');
+        // some validation should happen here
+        
+        $this->prependCSS($attr, "background-color:$bgcolor;");
+        
+        return $attr;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/BoolToCSS.php

@@ -0,0 +1,38 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Pre-transform that changes converts a boolean attribute to fixed CSS
+ */
+class HTMLPurifier_AttrTransform_BoolToCSS
+extends HTMLPurifier_AttrTransform {
+    
+    /**
+     * Name of boolean attribute that is trigger
+     */
+    protected $attr;
+    
+    /**
+     * CSS declarations to add to style, needs trailing semicolon
+     */
+    protected $css;
+    
+    /**
+     * @param $attr string attribute name to convert from
+     * @param $css string CSS declarations to add to style (needs semicolon)
+     */
+    public function __construct($attr, $css) {
+        $this->attr = $attr;
+        $this->css  = $css;
+    }
+    
+    public function transform($attr, $config, $context) {
+        if (!isset($attr[$this->attr])) return $attr;
+        unset($attr[$this->attr]);
+        $this->prependCSS($attr, $this->css);
+        return $attr;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/Border.php

@@ -0,0 +1,19 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Pre-transform that changes deprecated border attribute to CSS.
+ */
+class HTMLPurifier_AttrTransform_Border extends HTMLPurifier_AttrTransform {
+
+    public function transform($attr, $config, $context) {
+        if (!isset($attr['border'])) return $attr;
+        $border_width = $this->confiscateAttr($attr, 'border');
+        // some validation should happen here
+        $this->prependCSS($attr, "border:{$border_width}px solid;");
+        return $attr;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/EnumToCSS.php

@@ -0,0 +1,59 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Generic pre-transform that converts an attribute with a fixed number of
+ * values (enumerated) to CSS.
+ */
+class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform {
+    
+    /**
+     * Name of attribute to transform from
+     */
+    protected $attr;
+    
+    /**
+     * Lookup array of attribute values to CSS
+     */
+    protected $enumToCSS = array();
+    
+    /**
+     * Case sensitivity of the matching
+     * @warning Currently can only be guaranteed to work with ASCII
+     *          values.
+     */
+    protected $caseSensitive = false;
+    
+    /**
+     * @param $attr String attribute name to transform from
+     * @param $enumToCSS Lookup array of attribute values to CSS
+     * @param $case_sensitive Boolean case sensitivity indicator, default false
+     */
+    public function __construct($attr, $enum_to_css, $case_sensitive = false) {
+        $this->attr = $attr;
+        $this->enumToCSS = $enum_to_css;
+        $this->caseSensitive = (bool) $case_sensitive;
+    }
+    
+    public function transform($attr, $config, $context) {
+        
+        if (!isset($attr[$this->attr])) return $attr;
+        
+        $value = trim($attr[$this->attr]);
+        unset($attr[$this->attr]);
+        
+        if (!$this->caseSensitive) $value = strtolower($value);
+        
+        if (!isset($this->enumToCSS[$value])) {
+            return $attr;
+        }
+        
+        $this->prependCSS($attr, $this->enumToCSS[$value]);
+        
+        return $attr;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/ImgRequired.php

@@ -0,0 +1,53 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+// must be called POST validation
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'DefaultInvalidImage', '', 'string',
+    'This is the default image an img tag will be pointed to if it does '.
+    'not have a valid src attribute.  In future versions, we may allow the '.
+    'image tag to be removed completely, but due to design issues, this is '.
+    'not possible right now.'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Attr', 'DefaultInvalidImageAlt', 'Invalid image', 'string',
+    'This is the content of the alt tag of an invalid image if the user '.
+    'had not previously specified an alt attribute.  It has no effect when the '.
+    'image is valid but there was no alt attribute present.'
+);
+
+/**
+ * Transform that supplies default values for the src and alt attributes
+ * in img tags, as well as prevents the img tag from being removed
+ * because of a missing alt tag. This needs to be registered as both
+ * a pre and post attribute transform.
+ */
+class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
+{
+    
+    public function transform($attr, $config, $context) {
+        
+        $src = true;
+        if (!isset($attr['src'])) {
+            if ($config->get('Core', 'RemoveInvalidImg')) return $attr;
+            $attr['src'] = $config->get('Attr', 'DefaultInvalidImage');
+            $src = false;
+        }
+        
+        if (!isset($attr['alt'])) {
+            if ($src) {
+                $attr['alt'] = basename($attr['src']);
+            } else {
+                $attr['alt'] = $config->get('Attr', 'DefaultInvalidImageAlt');
+            }
+        }
+        
+        return $attr;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/ImgSpace.php

@@ -0,0 +1,45 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Pre-transform that changes deprecated hspace and vspace attributes to CSS
+ */
+class HTMLPurifier_AttrTransform_ImgSpace extends HTMLPurifier_AttrTransform {
+    
+    protected $attr;
+    protected $css = array(
+        'hspace' => array('left', 'right'),
+        'vspace' => array('top', 'bottom')
+    );
+    
+    public function __construct($attr) {
+        $this->attr = $attr;
+        if (!isset($this->css[$attr])) {
+            trigger_error(htmlspecialchars($attr) . ' is not valid space attribute');
+        }
+    }
+    
+    public function transform($attr, $config, $context) {
+        
+        if (!isset($attr[$this->attr])) return $attr;
+        
+        $width = $this->confiscateAttr($attr, $this->attr);
+        // some validation could happen here
+        
+        if (!isset($this->css[$this->attr])) return $attr;
+        
+        $style = '';
+        foreach ($this->css[$this->attr] as $suffix) {
+            $property = "margin-$suffix";
+            $style .= "$property:{$width}px;";
+        }
+        
+        $this->prependCSS($attr, $style);
+        
+        return $attr;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/Lang.php

@@ -0,0 +1,29 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Post-transform that copies lang's value to xml:lang (and vice-versa)
+ * @note Theoretically speaking, this could be a pre-transform, but putting
+ *       post is more efficient.
+ */
+class HTMLPurifier_AttrTransform_Lang extends HTMLPurifier_AttrTransform
+{
+    
+    public function transform($attr, $config, $context) {
+        
+        $lang     = isset($attr['lang']) ? $attr['lang'] : false;
+        $xml_lang = isset($attr['xml:lang']) ? $attr['xml:lang'] : false;
+        
+        if ($lang !== false && $xml_lang === false) {
+            $attr['xml:lang'] = $lang;
+        } elseif ($xml_lang !== false) {
+            $attr['lang'] = $xml_lang;
+        }
+        
+        return $attr;
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/Length.php

@@ -0,0 +1,28 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Class for handling width/height length attribute transformations to CSS
+ */
+class HTMLPurifier_AttrTransform_Length extends HTMLPurifier_AttrTransform
+{
+    
+    protected $name;
+    protected $cssName;
+    
+    public function __construct($name, $css_name = null) {
+        $this->name = $name;
+        $this->cssName = $css_name ? $css_name : $name;
+    }
+    
+    public function transform($attr, $config, $context) {
+        if (!isset($attr[$this->name])) return $attr;
+        $length = $this->confiscateAttr($attr, $this->name);
+        if(ctype_digit($length)) $length .= 'px';
+        $this->prependCSS($attr, $this->cssName . ":$length;");
+        return $attr;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTransform/Name.php

@@ -0,0 +1,20 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Pre-transform that changes deprecated name attribute to ID if necessary
+ */
+class HTMLPurifier_AttrTransform_Name extends HTMLPurifier_AttrTransform
+{
+    
+    public function transform($attr, $config, $context) {
+        if (!isset($attr['name'])) return $attr;
+        $id = $this->confiscateAttr($attr, 'name');
+        if ( isset($attr['id']))   return $attr;
+        $attr['id'] = $id;
+        return $attr;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrTypes.php

@@ -0,0 +1,84 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef/Lang.php';
+require_once 'HTMLPurifier/AttrDef/Enum.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Bool.php';
+require_once 'HTMLPurifier/AttrDef/HTML/ID.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Length.php';
+require_once 'HTMLPurifier/AttrDef/HTML/MultiLength.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Nmtokens.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Pixels.php';
+require_once 'HTMLPurifier/AttrDef/HTML/Color.php';
+require_once 'HTMLPurifier/AttrDef/Integer.php';
+require_once 'HTMLPurifier/AttrDef/Text.php';
+require_once 'HTMLPurifier/AttrDef/URI.php';
+
+/**
+ * Provides lookup array of attribute types to HTMLPurifier_AttrDef objects
+ */
+class HTMLPurifier_AttrTypes
+{
+    /**
+     * Lookup array of attribute string identifiers to concrete implementations
+     */
+    public $info = array();
+    
+    /**
+     * Constructs the info array, supplying default implementations for attribute
+     * types.
+     */
+    public function __construct() {
+        // pseudo-types, must be instantiated via shorthand
+        $this->info['Enum']    = new HTMLPurifier_AttrDef_Enum();
+        $this->info['Bool']    = new HTMLPurifier_AttrDef_HTML_Bool();
+        
+        $this->info['CDATA']    = new HTMLPurifier_AttrDef_Text();
+        $this->info['ID']       = new HTMLPurifier_AttrDef_HTML_ID();
+        $this->info['Length']   = new HTMLPurifier_AttrDef_HTML_Length();
+        $this->info['MultiLength'] = new HTMLPurifier_AttrDef_HTML_MultiLength();
+        $this->info['NMTOKENS'] = new HTMLPurifier_AttrDef_HTML_Nmtokens();
+        $this->info['Pixels']   = new HTMLPurifier_AttrDef_HTML_Pixels();
+        $this->info['Text']     = new HTMLPurifier_AttrDef_Text();
+        $this->info['URI']      = new HTMLPurifier_AttrDef_URI();
+        $this->info['LanguageCode'] = new HTMLPurifier_AttrDef_Lang();
+        $this->info['Color']    = new HTMLPurifier_AttrDef_HTML_Color();
+        
+        // unimplemented aliases
+        $this->info['ContentType'] = new HTMLPurifier_AttrDef_Text();
+        
+        // number is really a positive integer (one or more digits)
+        // FIXME: ^^ not always, see start and value of list items
+        $this->info['Number']   = new HTMLPurifier_AttrDef_Integer(false, false, true);
+    }
+    
+    /**
+     * Retrieves a type
+     * @param $type String type name
+     * @return Object AttrDef for type
+     */
+    public function get($type) {
+        
+        // determine if there is any extra info tacked on
+        if (strpos($type, '#') !== false) list($type, $string) = explode('#', $type, 2);
+        else $string = '';
+        
+        if (!isset($this->info[$type])) {
+            trigger_error('Cannot retrieve undefined attribute type ' . $type, E_USER_ERROR);
+            return;
+        }
+        
+        return $this->info[$type]->make($string);
+        
+    }
+    
+    /**
+     * Sets a new implementation for a type
+     * @param $type String type name
+     * @param $impl Object AttrDef for type
+     */
+    public function set($type, $impl) {
+        $this->info[$type] = $impl;
+    }
+}
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/AttrValidator.php

@@ -0,0 +1,146 @@
+<?php
+
+/**
+ * Validates the attributes of a token. Doesn't manage required attributes
+ * very well. The only reason we factored this out was because RemoveForeignElements
+ * also needed it besides ValidateAttributes.
+ */
+class HTMLPurifier_AttrValidator
+{
+    
+    /**
+     * Validates the attributes of a token, returning a modified token
+     * that has valid tokens
+     * @param $token Reference to token to validate. We require a reference
+     *     because the operation this class performs on the token are
+     *     not atomic, so the context CurrentToken to be updated
+     *     throughout
+     * @param $config Instance of HTMLPurifier_Config
+     * @param $context Instance of HTMLPurifier_Context
+     */
+    public function validateToken(&$token, &$config, $context) {
+            
+        $definition = $config->getHTMLDefinition();
+        $e =& $context->get('ErrorCollector', true);
+        
+        // initialize IDAccumulator if necessary
+        $ok =& $context->get('IDAccumulator', true);
+        if (!$ok) {
+            $id_accumulator = HTMLPurifier_IDAccumulator::build($config, $context);
+            $context->register('IDAccumulator', $id_accumulator);
+        }
+        
+        // initialize CurrentToken if necessary
+        $current_token =& $context->get('CurrentToken', true);
+        if (!$current_token) $context->register('CurrentToken', $token);
+        
+        if ($token->type !== 'start' && $token->type !== 'empty') return $token;
+        
+        // create alias to global definition array, see also $defs
+        // DEFINITION CALL
+        $d_defs = $definition->info_global_attr;
+        
+        // reference attributes for easy manipulation
+        $attr =& $token->attr;
+        
+        // do global transformations (pre)
+        // nothing currently utilizes this
+        foreach ($definition->info_attr_transform_pre as $transform) {
+            $attr = $transform->transform($o = $attr, $config, $context);
+            if ($e && ($attr != $o)) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+        }
+        
+        // do local transformations only applicable to this element (pre)
+        // ex. <p align="right"> to <p style="text-align:right;">
+        foreach ($definition->info[$token->name]->attr_transform_pre as $transform) {
+            $attr = $transform->transform($o = $attr, $config, $context);
+            if ($e && ($attr != $o)) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+        }
+        
+        // create alias to this element's attribute definition array, see
+        // also $d_defs (global attribute definition array)
+        // DEFINITION CALL
+        $defs = $definition->info[$token->name]->attr;
+        
+        $attr_key = false;
+        $context->register('CurrentAttr', $attr_key);
+        
+        // iterate through all the attribute keypairs
+        // Watch out for name collisions: $key has previously been used
+        foreach ($attr as $attr_key => $value) {
+            
+            // call the definition
+            if ( isset($defs[$attr_key]) ) {
+                // there is a local definition defined
+                if ($defs[$attr_key] === false) {
+                    // We've explicitly been told not to allow this element.
+                    // This is usually when there's a global definition
+                    // that must be overridden.
+                    // Theoretically speaking, we could have a
+                    // AttrDef_DenyAll, but this is faster!
+                    $result = false;
+                } else {
+                    // validate according to the element's definition
+                    $result = $defs[$attr_key]->validate(
+                                    $value, $config, $context
+                               );
+                }
+            } elseif ( isset($d_defs[$attr_key]) ) {
+                // there is a global definition defined, validate according
+                // to the global definition
+                $result = $d_defs[$attr_key]->validate(
+                                $value, $config, $context
+                           );
+            } else {
+                // system never heard of the attribute? DELETE!
+                $result = false;
+            }
+            
+            // put the results into effect
+            if ($result === false || $result === null) {
+                // this is a generic error message that should replaced
+                // with more specific ones when possible
+                if ($e) $e->send(E_ERROR, 'AttrValidator: Attribute removed');
+                
+                // remove the attribute
+                unset($attr[$attr_key]);
+            } elseif (is_string($result)) {
+                // generally, if a substitution is happening, there
+                // was some sort of implicit correction going on. We'll
+                // delegate it to the attribute classes to say exactly what.
+                
+                // simple substitution
+                $attr[$attr_key] = $result;
+            }
+            
+            // we'd also want slightly more complicated substitution
+            // involving an array as the return value,
+            // although we're not sure how colliding attributes would
+            // resolve (certain ones would be completely overriden,
+            // others would prepend themselves).
+        }
+        
+        $context->destroy('CurrentAttr');
+        
+        // post transforms
+        
+        // global (error reporting untested)
+        foreach ($definition->info_attr_transform_post as $transform) {
+            $attr = $transform->transform($o = $attr, $config, $context);
+            if ($e && ($attr != $o)) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+        }
+        
+        // local (error reporting untested)
+        foreach ($definition->info[$token->name]->attr_transform_post as $transform) {
+            $attr = $transform->transform($o = $attr, $config, $context);
+            if ($e && ($attr != $o)) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
+        }
+        
+        // destroy CurrentToken if we made it ourselves
+        if (!$current_token) $context->destroy('CurrentToken');
+        
+    }
+    
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/CSSDefinition.php

@@ -0,0 +1,263 @@
+<?php
+
+require_once 'HTMLPurifier/Definition.php';
+
+require_once 'HTMLPurifier/AttrDef/CSS/AlphaValue.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Background.php';
+require_once 'HTMLPurifier/AttrDef/CSS/BackgroundPosition.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Border.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Color.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Composite.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Filter.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Font.php';
+require_once 'HTMLPurifier/AttrDef/CSS/FontFamily.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Length.php';
+require_once 'HTMLPurifier/AttrDef/CSS/ListStyle.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Multiple.php';
+require_once 'HTMLPurifier/AttrDef/CSS/Percentage.php';
+require_once 'HTMLPurifier/AttrDef/CSS/TextDecoration.php';
+require_once 'HTMLPurifier/AttrDef/CSS/URI.php';
+require_once 'HTMLPurifier/AttrDef/Enum.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'CSS', 'DefinitionRev', 1, 'int', '
+<p>
+    Revision identifier for your custom definition. See
+    %HTML.DefinitionRev for details. This directive has been available
+    since 2.0.0.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'CSS', 'Proprietary', false, 'bool', '
+<p>
+    Whether or not to allow safe, proprietary CSS values. This directive
+    has been available since 3.0.0.
+</p>
+');
+
+/**
+ * Defines allowed CSS attributes and what their values are.
+ * @see HTMLPurifier_HTMLDefinition
+ */
+class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
+{
+    
+    public $type = 'CSS';
+    
+    /**
+     * Assoc array of attribute name to definition object.
+     */
+    public $info = array();
+    
+    /**
+     * Constructs the info array.  The meat of this class.
+     */
+    protected function doSetup($config) {
+        
+        $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
+            array('left', 'right', 'center', 'justify'), false);
+        
+        $border_style =
+        $this->info['border-bottom-style'] = 
+        $this->info['border-right-style'] = 
+        $this->info['border-left-style'] = 
+        $this->info['border-top-style'] =  new HTMLPurifier_AttrDef_Enum(
+            array('none', 'hidden', 'dotted', 'dashed', 'solid', 'double',
+            'groove', 'ridge', 'inset', 'outset'), false);
+        
+        $this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
+        
+        $this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
+            array('none', 'left', 'right', 'both'), false);
+        $this->info['float'] = new HTMLPurifier_AttrDef_Enum(
+            array('none', 'left', 'right'), false);
+        $this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
+            array('normal', 'italic', 'oblique'), false);
+        $this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
+            array('normal', 'small-caps'), false);
+        
+        $uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
+            array(
+                new HTMLPurifier_AttrDef_Enum(array('none')),
+                new HTMLPurifier_AttrDef_CSS_URI()
+            )
+        );
+        
+        $this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
+            array('inside', 'outside'), false);
+        $this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
+            array('disc', 'circle', 'square', 'decimal', 'lower-roman',
+            'upper-roman', 'lower-alpha', 'upper-alpha', 'none'), false);
+        $this->info['list-style-image'] = $uri_or_none;
+        
+        $this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
+        
+        $this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
+            array('capitalize', 'uppercase', 'lowercase', 'none'), false);
+        $this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
+        
+        $this->info['background-image'] = $uri_or_none;
+        $this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
+            array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
+        );
+        $this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
+            array('scroll', 'fixed')
+        );
+        $this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
+        
+        $border_color = 
+        $this->info['border-top-color'] = 
+        $this->info['border-bottom-color'] = 
+        $this->info['border-left-color'] = 
+        $this->info['border-right-color'] = 
+        $this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('transparent')),
+            new HTMLPurifier_AttrDef_CSS_Color()
+        ));
+        
+        $this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
+        
+        $this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
+        
+        $border_width = 
+        $this->info['border-top-width'] = 
+        $this->info['border-bottom-width'] = 
+        $this->info['border-left-width'] = 
+        $this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
+            new HTMLPurifier_AttrDef_CSS_Length(true) //disallow negative
+        ));
+        
+        $this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
+        
+        $this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('normal')),
+            new HTMLPurifier_AttrDef_CSS_Length()
+        ));
+        
+        $this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('normal')),
+            new HTMLPurifier_AttrDef_CSS_Length()
+        ));
+        
+        $this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('xx-small', 'x-small',
+                'small', 'medium', 'large', 'x-large', 'xx-large',
+                'larger', 'smaller')),
+            new HTMLPurifier_AttrDef_CSS_Percentage(),
+            new HTMLPurifier_AttrDef_CSS_Length()
+        ));
+        
+        $this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('normal')),
+            new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
+            new HTMLPurifier_AttrDef_CSS_Length(true),
+            new HTMLPurifier_AttrDef_CSS_Percentage(true)
+        ));
+        
+        $margin =
+        $this->info['margin-top'] = 
+        $this->info['margin-bottom'] = 
+        $this->info['margin-left'] = 
+        $this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_CSS_Length(),
+            new HTMLPurifier_AttrDef_CSS_Percentage(),
+            new HTMLPurifier_AttrDef_Enum(array('auto'))
+        ));
+        
+        $this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
+        
+        // non-negative
+        $padding =
+        $this->info['padding-top'] = 
+        $this->info['padding-bottom'] = 
+        $this->info['padding-left'] = 
+        $this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_CSS_Length(true),
+            new HTMLPurifier_AttrDef_CSS_Percentage(true)
+        ));
+        
+        $this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
+        
+        $this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_CSS_Length(),
+            new HTMLPurifier_AttrDef_CSS_Percentage()
+        ));
+        
+        $this->info['width'] =
+        $this->info['height'] = 
+        new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_CSS_Length(true),
+            new HTMLPurifier_AttrDef_CSS_Percentage(true),
+            new HTMLPurifier_AttrDef_Enum(array('auto'))
+        ));
+        
+        $this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
+        
+        $this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
+        
+        // this could use specialized code
+        $this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
+            array('normal', 'bold', 'bolder', 'lighter', '100', '200', '300',
+            '400', '500', '600', '700', '800', '900'), false);
+        
+        // MUST be called after other font properties, as it references
+        // a CSSDefinition object
+        $this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
+        
+        // same here
+        $this->info['border'] =
+        $this->info['border-bottom'] = 
+        $this->info['border-top'] = 
+        $this->info['border-left'] = 
+        $this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
+        
+        $this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(array(
+            'collapse', 'separate'));
+        
+        $this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(array(
+            'top', 'bottom'));
+        
+        $this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(array(
+            'auto', 'fixed'));
+        
+        $this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
+            new HTMLPurifier_AttrDef_Enum(array('baseline', 'sub', 'super',
+                'top', 'text-top', 'middle', 'bottom', 'text-bottom')),
+            new HTMLPurifier_AttrDef_CSS_Length(),
+            new HTMLPurifier_AttrDef_CSS_Percentage()
+        ));
+        
+        $this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
+        
+        // partial support
+        $this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(array('nowrap'));
+        
+        if ($config->get('CSS', 'Proprietary')) {
+            $this->doSetupProprietary($config);
+        }
+        
+    }
+    
+    protected function doSetupProprietary($config) {
+        // Internet Explorer only scrollbar colors
+        $this->info['scrollbar-arrow-color']        = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-base-color']         = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-darkshadow-color']   = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-face-color']         = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-highlight-color']    = new HTMLPurifier_AttrDef_CSS_Color();
+        $this->info['scrollbar-shadow-color']       = new HTMLPurifier_AttrDef_CSS_Color();
+        
+        // technically not proprietary, but CSS3, and no one supports it
+        $this->info['opacity']          = new HTMLPurifier_AttrDef_CSS_AlphaValue();
+        $this->info['-moz-opacity']     = new HTMLPurifier_AttrDef_CSS_AlphaValue();
+        $this->info['-khtml-opacity']   = new HTMLPurifier_AttrDef_CSS_AlphaValue();
+        
+        // only opacity, for now
+        $this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef.php

@@ -0,0 +1,56 @@
+<?php
+
+// HTMLPurifier_ChildDef and inheritance have three types of output:
+// true = leave nodes as is
+// false = delete parent node and all children
+// array(...) = replace children nodes with these
+
+HTMLPurifier_ConfigSchema::define(
+    'Core', 'EscapeInvalidChildren', false, 'bool',
+    'When true, a child is found that is not allowed in the context of the '.
+    'parent element will be transformed into text as if it were ASCII. When '.
+    'false, that element and all internal tags will be dropped, though text '.
+    'will be preserved.  There is no option for dropping the element but '.
+    'preserving child nodes.'
+);
+
+/**
+ * Defines allowed child nodes and validates tokens against it.
+ */
+class HTMLPurifier_ChildDef
+{
+    /**
+     * Type of child definition, usually right-most part of class name lowercase.
+     * Used occasionally in terms of context.
+     */
+    public $type;
+    
+    /**
+     * Bool that indicates whether or not an empty array of children is okay
+     * 
+     * This is necessary for redundant checking when changes affecting
+     * a child node may cause a parent node to now be disallowed.
+     */
+    public $allow_empty;
+    
+    /**
+     * Lookup array of all elements that this definition could possibly allow
+     */
+    public $elements = array();
+    
+    /**
+     * Validates nodes according to definition and returns modification.
+     * 
+     * @param $tokens_of_children Array of HTMLPurifier_Token
+     * @param $config HTMLPurifier_Config object
+     * @param $context HTMLPurifier_Context object
+     * @return bool true to leave nodes as is
+     * @return bool false to remove parent node
+     * @return array of replacement child tokens
+     */
+    public function validateChildren($tokens_of_children, $config, $context) {
+        trigger_error('Call to abstract function', E_USER_ERROR);
+    }
+}
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/Chameleon.php

@@ -0,0 +1,49 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef.php';
+
+/**
+ * Definition that uses different definitions depending on context.
+ * 
+ * The del and ins tags are notable because they allow different types of
+ * elements depending on whether or not they're in a block or inline context.
+ * Chameleon allows this behavior to happen by using two different
+ * definitions depending on context.  While this somewhat generalized,
+ * it is specifically intended for those two tags.
+ */
+class HTMLPurifier_ChildDef_Chameleon extends HTMLPurifier_ChildDef
+{
+    
+    /**
+     * Instance of the definition object to use when inline. Usually stricter.
+     */
+    public $inline;
+    
+    /**
+     * Instance of the definition object to use when block.
+     */
+    public $block;
+    
+    public $type = 'chameleon';
+    
+    /**
+     * @param $inline List of elements to allow when inline.
+     * @param $block List of elements to allow when block.
+     */
+    public function __construct($inline, $block) {
+        $this->inline = new HTMLPurifier_ChildDef_Optional($inline);
+        $this->block  = new HTMLPurifier_ChildDef_Optional($block);
+        $this->elements = $this->block->elements;
+    }
+    
+    public function validateChildren($tokens_of_children, $config, $context) {
+        if ($context->get('IsInline') === false) {
+            return $this->block->validateChildren(
+                $tokens_of_children, $config, $context);
+        } else {
+            return $this->inline->validateChildren(
+                $tokens_of_children, $config, $context);
+        }
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/Custom.php

@@ -0,0 +1,93 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef.php';
+
+/**
+ * Custom validation class, accepts DTD child definitions
+ * 
+ * @warning Currently this class is an all or nothing proposition, that is,
+ *          it will only give a bool return value.
+ * @note This class is currently not used by any code, although it is unit
+ *       tested.
+ */
+class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
+{
+    public $type = 'custom';
+    public $allow_empty = false;
+    /**
+     * Allowed child pattern as defined by the DTD
+     */
+    public $dtd_regex;
+    /**
+     * PCRE regex derived from $dtd_regex
+     * @private
+     */
+    private $_pcre_regex;
+    /**
+     * @param $dtd_regex Allowed child pattern from the DTD
+     */
+    public function __construct($dtd_regex) {
+        $this->dtd_regex = $dtd_regex;
+        $this->_compileRegex();
+    }
+    /**
+     * Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
+     */
+    protected function _compileRegex() {
+        $raw = str_replace(' ', '', $this->dtd_regex);
+        if ($raw{0} != '(') {
+            $raw = "($raw)";
+        }
+        $el = '[#a-zA-Z0-9_.-]+';
+        $reg = $raw;
+        
+        // COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
+        // DOING! Seriously: if there's problems, please report them.
+        
+        // collect all elements into the $elements array
+        preg_match_all("/$el/", $reg, $matches);
+        foreach ($matches[0] as $match) {
+            $this->elements[$match] = true;
+        }
+        
+        // setup all elements as parentheticals with leading commas
+        $reg = preg_replace("/$el/", '(,\\0)', $reg);
+        
+        // remove commas when they were not solicited
+        $reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
+        
+        // remove all non-paranthetical commas: they are handled by first regex
+        $reg = preg_replace("/,\(/", '(', $reg);
+        
+        $this->_pcre_regex = $reg;
+    }
+    public function validateChildren($tokens_of_children, $config, $context) {
+        $list_of_children = '';
+        $nesting = 0; // depth into the nest
+        foreach ($tokens_of_children as $token) {
+            if (!empty($token->is_whitespace)) continue;
+            
+            $is_child = ($nesting == 0); // direct
+            
+            if ($token->type == 'start') {
+                $nesting++;
+            } elseif ($token->type == 'end') {
+                $nesting--;
+            }
+            
+            if ($is_child) {
+                $list_of_children .= $token->name . ',';
+            }
+        }
+        // add leading comma to deal with stray comma declarations
+        $list_of_children = ',' . rtrim($list_of_children, ',');
+        $okay =
+            preg_match(
+                '/^,?'.$this->_pcre_regex.'$/',
+                $list_of_children
+            );
+        
+        return (bool) $okay;
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/Empty.php

@@ -0,0 +1,21 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef.php';
+
+/**
+ * Definition that disallows all elements.
+ * @warning validateChildren() in this class is actually never called, because
+ *          empty elements are corrected in HTMLPurifier_Strategy_MakeWellFormed
+ *          before child definitions are parsed in earnest by
+ *          HTMLPurifier_Strategy_FixNesting.
+ */
+class HTMLPurifier_ChildDef_Empty extends HTMLPurifier_ChildDef
+{
+    public $allow_empty = true;
+    public $type = 'empty';
+    public function __construct() {}
+    public function validateChildren($tokens_of_children, $config, $context) {
+        return array();
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/Optional.php

@@ -0,0 +1,25 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef/Required.php';
+
+/**
+ * Definition that allows a set of elements, and allows no children.
+ * @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required,
+ *       really, one shouldn't inherit from the other.  Only altered behavior
+ *       is to overload a returned false with an array.  Thus, it will never
+ *       return false.
+ */
+class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required
+{
+    public $allow_empty = true;
+    public $type = 'optional';
+    public function validateChildren($tokens_of_children, $config, $context) {
+        $result = parent::validateChildren($tokens_of_children, $config, $context);
+        if ($result === false) {
+            if (empty($tokens_of_children)) return true;
+            else return array();
+        }
+        return $result;
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/Required.php

@@ -0,0 +1,111 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef.php';
+
+/**
+ * Definition that allows a set of elements, but disallows empty children.
+ */
+class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef
+{
+    /**
+     * Lookup table of allowed elements.
+     * @public
+     */
+    public $elements = array();
+    /**
+     * @param $elements List of allowed element names (lowercase).
+     */
+    public function __construct($elements) {
+        if (is_string($elements)) {
+            $elements = str_replace(' ', '', $elements);
+            $elements = explode('|', $elements);
+        }
+        $keys = array_keys($elements);
+        if ($keys == array_keys($keys)) {
+            $elements = array_flip($elements);
+            foreach ($elements as $i => $x) {
+                $elements[$i] = true;
+                if (empty($i)) unset($elements[$i]); // remove blank
+            }
+        }
+        $this->elements = $elements;
+    }
+    public $allow_empty = false;
+    public $type = 'required';
+    public function validateChildren($tokens_of_children, $config, $context) {
+        // if there are no tokens, delete parent node
+        if (empty($tokens_of_children)) return false;
+        
+        // the new set of children
+        $result = array();
+        
+        // current depth into the nest
+        $nesting = 0;
+        
+        // whether or not we're deleting a node
+        $is_deleting = false;
+        
+        // whether or not parsed character data is allowed
+        // this controls whether or not we silently drop a tag
+        // or generate escaped HTML from it
+        $pcdata_allowed = isset($this->elements['#PCDATA']);
+        
+        // a little sanity check to make sure it's not ALL whitespace
+        $all_whitespace = true;
+        
+        // some configuration
+        $escape_invalid_children = $config->get('Core', 'EscapeInvalidChildren');
+        
+        // generator
+        static $gen = null;
+        if ($gen === null) {
+            $gen = new HTMLPurifier_Generator();
+        }
+        
+        foreach ($tokens_of_children as $token) {
+            if (!empty($token->is_whitespace)) {
+                $result[] = $token;
+                continue;
+            }
+            $all_whitespace = false; // phew, we're not talking about whitespace
+            
+            $is_child = ($nesting == 0);
+            
+            if ($token->type == 'start') {
+                $nesting++;
+            } elseif ($token->type == 'end') {
+                $nesting--;
+            }
+            
+            if ($is_child) {
+                $is_deleting = false;
+                if (!isset($this->elements[$token->name])) {
+                    $is_deleting = true;
+                    if ($pcdata_allowed && $token->type == 'text') {
+                        $result[] = $token;
+                    } elseif ($pcdata_allowed && $escape_invalid_children) {
+                        $result[] = new HTMLPurifier_Token_Text(
+                            $gen->generateFromToken($token, $config)
+                        );
+                    }
+                    continue;
+                }
+            }
+            if (!$is_deleting || ($pcdata_allowed && $token->type == 'text')) {
+                $result[] = $token;
+            } elseif ($pcdata_allowed && $escape_invalid_children) {
+                $result[] =
+                    new HTMLPurifier_Token_Text(
+                        $gen->generateFromToken( $token, $config )
+                    );
+            } else {
+                // drop silently
+            }
+        }
+        if (empty($result)) return false;
+        if ($all_whitespace) return false;
+        if ($tokens_of_children == $result) return true;
+        return $result;
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/StrictBlockquote.php

@@ -0,0 +1,75 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef/Required.php';
+
+/**
+ * Takes the contents of blockquote when in strict and reformats for validation.
+ */
+class   HTMLPurifier_ChildDef_StrictBlockquote
+extends HTMLPurifier_ChildDef_Required
+{
+    protected $real_elements;
+    protected $fake_elements;
+    public $allow_empty = true;
+    public $type = 'strictblockquote';
+    protected $init = false;
+    public function validateChildren($tokens_of_children, $config, $context) {
+        
+        $def = $config->getHTMLDefinition();
+        if (!$this->init) {
+            // allow all inline elements
+            $this->real_elements = $this->elements;
+            $this->fake_elements = $def->info_content_sets['Flow'];
+            $this->fake_elements['#PCDATA'] = true;
+            $this->init = true;
+        }
+        
+        // trick the parent class into thinking it allows more
+        $this->elements = $this->fake_elements;
+        $result = parent::validateChildren($tokens_of_children, $config, $context);
+        $this->elements = $this->real_elements;
+        
+        if ($result === false) return array();
+        if ($result === true) $result = $tokens_of_children;
+        
+        $block_wrap_start = new HTMLPurifier_Token_Start($def->info_block_wrapper);
+        $block_wrap_end   = new HTMLPurifier_Token_End(  $def->info_block_wrapper);
+        $is_inline = false;
+        $depth = 0;
+        $ret = array();
+        
+        // assuming that there are no comment tokens
+        foreach ($result as $i => $token) {
+            $token = $result[$i];
+            // ifs are nested for readability
+            if (!$is_inline) {
+                if (!$depth) {
+                     if (
+                        ($token->type == 'text' && !$token->is_whitespace) ||
+                        ($token->type != 'text' && !isset($this->elements[$token->name]))
+                     ) {
+                        $is_inline = true;
+                        $ret[] = $block_wrap_start;
+                     }
+                }
+            } else {
+                if (!$depth) {
+                    // starting tokens have been inline text / empty
+                    if ($token->type == 'start' || $token->type == 'empty') {
+                        if (isset($this->elements[$token->name])) {
+                            // ended
+                            $ret[] = $block_wrap_end;
+                            $is_inline = false;
+                        }
+                    }
+                }
+            }
+            $ret[] = $token;
+            if ($token->type == 'start') $depth++;
+            if ($token->type == 'end')   $depth--;
+        }
+        if ($is_inline) $ret[] = $block_wrap_end;
+        return $ret;
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ChildDef/Table.php

@@ -0,0 +1,143 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef.php';
+
+/**
+ * Definition for tables
+ */
+class HTMLPurifier_ChildDef_Table extends HTMLPurifier_ChildDef
+{
+    public $allow_empty = false;
+    public $type = 'table';
+    public $elements = array('tr' => true, 'tbody' => true, 'thead' => true,
+        'tfoot' => true, 'caption' => true, 'colgroup' => true, 'col' => true);
+    public function __construct() {}
+    public function validateChildren($tokens_of_children, $config, $context) {
+        if (empty($tokens_of_children)) return false;
+        
+        // this ensures that the loop gets run one last time before closing
+        // up. It's a little bit of a hack, but it works! Just make sure you
+        // get rid of the token later.
+        $tokens_of_children[] = false;
+        
+        // only one of these elements is allowed in a table
+        $caption = false;
+        $thead   = false;
+        $tfoot   = false;
+        
+        // as many of these as you want
+        $cols    = array();
+        $content = array();
+        
+        $nesting = 0; // current depth so we can determine nodes
+        $is_collecting = false; // are we globbing together tokens to package
+                                // into one of the collectors?
+        $collection = array(); // collected nodes
+        $tag_index = 0; // the first node might be whitespace,
+                            // so this tells us where the start tag is
+        
+        foreach ($tokens_of_children as $token) {
+            $is_child = ($nesting == 0);
+            
+            if ($token === false) {
+                // terminating sequence started
+            } elseif ($token->type == 'start') {
+                $nesting++;
+            } elseif ($token->type == 'end') {
+                $nesting--;
+            }
+            
+            // handle node collection
+            if ($is_collecting) {
+                if ($is_child) {
+                    // okay, let's stash the tokens away
+                    // first token tells us the type of the collection
+                    switch ($collection[$tag_index]->name) {
+                        case 'tr':
+                        case 'tbody':
+                            $content[] = $collection;
+                            break;
+                        case 'caption':
+                            if ($caption !== false) break;
+                            $caption = $collection;
+                            break;
+                        case 'thead':
+                        case 'tfoot':
+                            // access the appropriate variable, $thead or $tfoot
+                            $var = $collection[$tag_index]->name;
+                            if ($$var === false) {
+                                $$var = $collection;
+                            } else {
+                                // transmutate the first and less entries into
+                                // tbody tags, and then put into content
+                                $collection[$tag_index]->name = 'tbody';
+                                $collection[count($collection)-1]->name = 'tbody';
+                                $content[] = $collection;
+                            }
+                            break;
+                         case 'colgroup':
+                            $cols[] = $collection;
+                            break;
+                    }
+                    $collection = array();
+                    $is_collecting = false;
+                    $tag_index = 0;
+                } else {
+                    // add the node to the collection
+                    $collection[] = $token;
+                }
+            }
+            
+            // terminate
+            if ($token === false) break;
+            
+            if ($is_child) {
+                // determine what we're dealing with
+                if ($token->name == 'col') {
+                    // the only empty tag in the possie, we can handle it
+                    // immediately
+                    $cols[] = array_merge($collection, array($token));
+                    $collection = array();
+                    $tag_index = 0;
+                    continue;
+                }
+                switch($token->name) {
+                    case 'caption':
+                    case 'colgroup':
+                    case 'thead':
+                    case 'tfoot':
+                    case 'tbody':
+                    case 'tr':
+                        $is_collecting = true;
+                        $collection[] = $token;
+                        continue;
+                    default:
+                        if ($token->type == 'text' && $token->is_whitespace) {
+                            $collection[] = $token;
+                            $tag_index++;
+                        }
+                        continue;
+                }
+            }
+        }
+        
+        if (empty($content)) return false;
+        
+        $ret = array();
+        if ($caption !== false) $ret = array_merge($ret, $caption);
+        if ($cols !== false)    foreach ($cols as $token_array) $ret = array_merge($ret, $token_array);
+        if ($thead !== false)   $ret = array_merge($ret, $thead);
+        if ($tfoot !== false)   $ret = array_merge($ret, $tfoot);
+        foreach ($content as $token_array) $ret = array_merge($ret, $token_array);
+        if (!empty($collection) && $is_collecting == false){
+            // grab the trailing space
+            $ret = array_merge($ret, $collection);
+        }
+        
+        array_pop($tokens_of_children); // remove phantom token
+        
+        return ($ret === $tokens_of_children) ? true : $ret;
+        
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Config.php

@@ -0,0 +1,495 @@
+<?php
+
+require_once 'HTMLPurifier/ConfigSchema.php';
+
+// member variables
+require_once 'HTMLPurifier/HTMLDefinition.php';
+require_once 'HTMLPurifier/CSSDefinition.php';
+require_once 'HTMLPurifier/URIDefinition.php';
+require_once 'HTMLPurifier/Doctype.php';
+require_once 'HTMLPurifier/DefinitionCacheFactory.php';
+
+// accomodations for versions earlier than 4.3.10 and 5.0.2
+// borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>
+if (!defined('PHP_EOL')) {
+    switch (strtoupper(substr(PHP_OS, 0, 3))) {
+        case 'WIN':
+            define('PHP_EOL', "\r\n");
+            break;
+        case 'DAR':
+            define('PHP_EOL', "\r");
+            break;
+        default:
+            define('PHP_EOL', "\n");
+    }
+}
+
+/**
+ * Configuration object that triggers customizable behavior.
+ *
+ * @warning This class is strongly defined: that means that the class
+ *          will fail if an undefined directive is retrieved or set.
+ * 
+ * @note Many classes that could (although many times don't) use the
+ *       configuration object make it a mandatory parameter.  This is
+ *       because a configuration object should always be forwarded,
+ *       otherwise, you run the risk of missing a parameter and then
+ *       being stumped when a configuration directive doesn't work.
+ * 
+ * @todo Reconsider some of the public member variables
+ */
+class HTMLPurifier_Config
+{
+    
+    /**
+     * HTML Purifier's version
+     */
+    public $version = '3.0.0';
+    
+    /**
+     * Bool indicator whether or not to automatically finalize 
+     * the object if a read operation is done
+     */
+    public $autoFinalize = true;
+    
+    // protected member variables
+    
+    /**
+     * Namespace indexed array of serials for specific namespaces (see
+     * getSerial() for more info).
+     */
+    protected $serials = array();
+    
+    /**
+     * Serial for entire configuration object
+     */
+    protected $serial;
+    
+    /**
+     * Two-level associative array of configuration directives
+     */
+    protected $conf;
+    
+    /**
+     * Reference HTMLPurifier_ConfigSchema for value checking
+     * @note This is public for introspective purposes. Please don't
+     *       abuse!
+     */
+    public $def;
+    
+    /**
+     * Indexed array of definitions
+     */
+    protected $definitions;
+    
+    /**
+     * Bool indicator whether or not config is finalized
+     */
+    protected $finalized = false;
+    
+    /**
+     * @param $definition HTMLPurifier_ConfigSchema that defines what directives
+     *                    are allowed.
+     */
+    public function __construct(&$definition) {
+        $this->conf = $definition->defaults; // set up, copy in defaults
+        $this->def  = $definition; // keep a copy around for checking
+    }
+    
+    /**
+     * Convenience constructor that creates a config object based on a mixed var
+     * @param mixed $config Variable that defines the state of the config
+     *                      object. Can be: a HTMLPurifier_Config() object,
+     *                      an array of directives based on loadArray(),
+     *                      or a string filename of an ini file.
+     * @return Configured HTMLPurifier_Config object
+     */
+    public static function create($config) {
+        if ($config instanceof HTMLPurifier_Config) {
+            // pass-through
+            return $config;
+        }
+        $ret = HTMLPurifier_Config::createDefault();
+        if (is_string($config)) $ret->loadIni($config);
+        elseif (is_array($config)) $ret->loadArray($config);
+        return $ret;
+    }
+    
+    /**
+     * Convenience constructor that creates a default configuration object.
+     * @return Default HTMLPurifier_Config object.
+     */
+    public static function createDefault() {
+        $definition =& HTMLPurifier_ConfigSchema::instance();
+        $config = new HTMLPurifier_Config($definition);
+        return $config;
+    }
+    
+    /**
+     * Retreives a value from the configuration.
+     * @param $namespace String namespace
+     * @param $key String key
+     */
+    public function get($namespace, $key) {
+        if (!$this->finalized && $this->autoFinalize) $this->finalize();
+        if (!isset($this->def->info[$namespace][$key])) {
+            // can't add % due to SimpleTest bug
+            trigger_error('Cannot retrieve value of undefined directive ' . htmlspecialchars("$namespace.$key"),
+                E_USER_WARNING);
+            return;
+        }
+        if ($this->def->info[$namespace][$key]->class == 'alias') {
+            $d = $this->def->info[$namespace][$key];
+            trigger_error('Cannot get value from aliased directive, use real name ' . $d->namespace . '.' . $d->name,
+                E_USER_ERROR);
+            return;
+        }
+        return $this->conf[$namespace][$key];
+    }
+    
+    /**
+     * Retreives an array of directives to values from a given namespace
+     * @param $namespace String namespace
+     */
+    public function getBatch($namespace) {
+        if (!$this->finalized && $this->autoFinalize) $this->finalize();
+        if (!isset($this->def->info[$namespace])) {
+            trigger_error('Cannot retrieve undefined namespace ' . htmlspecialchars($namespace),
+                E_USER_WARNING);
+            return;
+        }
+        return $this->conf[$namespace];
+    }
+    
+    /**
+     * Returns a md5 signature of a segment of the configuration object
+     * that uniquely identifies that particular configuration
+     * @note Revision is handled specially and is removed from the batch
+     *       before processing!
+     * @param $namespace Namespace to get serial for
+     */
+    public function getBatchSerial($namespace) {
+        if (empty($this->serials[$namespace])) {
+            $batch = $this->getBatch($namespace);
+            unset($batch['DefinitionRev']);
+            $this->serials[$namespace] = md5(serialize($batch));
+        }
+        return $this->serials[$namespace];
+    }
+    
+    /**
+     * Returns a md5 signature for the entire configuration object
+     * that uniquely identifies that particular configuration
+     */
+    public function getSerial() {
+        if (empty($this->serial)) {
+            $this->serial = md5(serialize($this->getAll()));
+        }
+        return $this->serial;
+    }
+    
+    /**
+     * Retrieves all directives, organized by namespace
+     */
+    public function getAll() {
+        if (!$this->finalized && $this->autoFinalize) $this->finalize();
+        return $this->conf;
+    }
+    
+    /**
+     * Sets a value to configuration.
+     * @param $namespace String namespace
+     * @param $key String key
+     * @param $value Mixed value
+     */
+    public function set($namespace, $key, $value, $from_alias = false) {
+        if ($this->isFinalized('Cannot set directive after finalization')) return;
+        if (!isset($this->def->info[$namespace][$key])) {
+            trigger_error('Cannot set undefined directive ' . htmlspecialchars("$namespace.$key") . ' to value',
+                E_USER_WARNING);
+            return;
+        }
+        if ($this->def->info[$namespace][$key]->class == 'alias') {
+            if ($from_alias) {
+                trigger_error('Double-aliases not allowed, please fix '.
+                    'ConfigSchema bug with' . "$namespace.$key");
+            }
+            $this->set($this->def->info[$namespace][$key]->namespace,
+                       $this->def->info[$namespace][$key]->name,
+                       $value, true);
+            return;
+        }
+        $value = $this->def->validate(
+                    $value,
+                    $type = $this->def->info[$namespace][$key]->type,
+                    $this->def->info[$namespace][$key]->allow_null
+                 );
+        if (is_string($value)) {
+            // resolve value alias if defined
+            if (isset($this->def->info[$namespace][$key]->aliases[$value])) {
+                $value = $this->def->info[$namespace][$key]->aliases[$value];
+            }
+            if ($this->def->info[$namespace][$key]->allowed !== true) {
+                // check to see if the value is allowed
+                if (!isset($this->def->info[$namespace][$key]->allowed[$value])) {
+                    trigger_error('Value not supported, valid values are: ' .
+                        $this->_listify($this->def->info[$namespace][$key]->allowed), E_USER_WARNING);
+                    return;
+                }
+            }
+        }
+        if ($this->def->isError($value)) {
+            trigger_error('Value for ' . "$namespace.$key" . ' is of invalid type, should be ' . $type, E_USER_WARNING);
+            return;
+        }
+        $this->conf[$namespace][$key] = $value;
+        
+        // reset definitions if the directives they depend on changed
+        // this is a very costly process, so it's discouraged 
+        // with finalization
+        if ($namespace == 'HTML' || $namespace == 'CSS') {
+            $this->definitions[$namespace] = null;
+        }
+        
+        $this->serials[$namespace] = false;
+    }
+    
+    /**
+     * Convenience function for error reporting
+     */
+    private function _listify($lookup) {
+        $list = array();
+        foreach ($lookup as $name => $b) $list[] = $name;
+        return implode(', ', $list);
+    }
+    
+    /**
+     * Retrieves reference to the HTML definition.
+     * @param $raw Return a copy that has not been setup yet. Must be
+     *             called before it's been setup, otherwise won't work.
+     */
+    public function &getHTMLDefinition($raw = false) {
+        $def =& $this->getDefinition('HTML', $raw);
+        return $def; // prevent PHP 4.4.0 from complaining
+    }
+    
+    /**
+     * Retrieves reference to the CSS definition
+     */
+    public function &getCSSDefinition($raw = false) {
+        $def =& $this->getDefinition('CSS', $raw);
+        return $def;
+    }
+    
+    /**
+     * Retrieves a definition
+     * @param $type Type of definition: HTML, CSS, etc
+     * @param $raw  Whether or not definition should be returned raw
+     */
+    public function &getDefinition($type, $raw = false) {
+        if (!$this->finalized && $this->autoFinalize) $this->finalize();
+        $factory = HTMLPurifier_DefinitionCacheFactory::instance();
+        $cache = $factory->create($type, $this);
+        if (!$raw) {
+            // see if we can quickly supply a definition
+            if (!empty($this->definitions[$type])) {
+                if (!$this->definitions[$type]->setup) {
+                    $this->definitions[$type]->setup($this);
+                    $cache->set($this->definitions[$type], $this);
+                }
+                return $this->definitions[$type];
+            }
+            // memory check missed, try cache
+            $this->definitions[$type] = $cache->get($this);
+            if ($this->definitions[$type]) {
+                // definition in cache, return it
+                return $this->definitions[$type];
+            }
+        } elseif (
+            !empty($this->definitions[$type]) &&
+            !$this->definitions[$type]->setup
+        ) {
+            // raw requested, raw in memory, quick return
+            return $this->definitions[$type];
+        }
+        // quick checks failed, let's create the object
+        if ($type == 'HTML') {
+            $this->definitions[$type] = new HTMLPurifier_HTMLDefinition();
+        } elseif ($type == 'CSS') {
+            $this->definitions[$type] = new HTMLPurifier_CSSDefinition();
+        } elseif ($type == 'URI') {
+            $this->definitions[$type] = new HTMLPurifier_URIDefinition();
+        } else {
+            trigger_error("Definition of $type type not supported");
+            $false = false;
+            return $false;
+        }
+        // quick abort if raw
+        if ($raw) {
+            if (is_null($this->get($type, 'DefinitionID'))) {
+                // fatally error out if definition ID not set
+                trigger_error("Cannot retrieve raw version without specifying %$type.DefinitionID", E_USER_ERROR);
+                $false = new HTMLPurifier_Error();
+                return $false;
+            }
+            return $this->definitions[$type];
+        }
+        // set it up
+        $this->definitions[$type]->setup($this);
+        // save in cache
+        $cache->set($this->definitions[$type], $this);
+        return $this->definitions[$type];
+    }
+    
+    /**
+     * Loads configuration values from an array with the following structure:
+     * Namespace.Directive => Value
+     * @param $config_array Configuration associative array
+     */
+    public function loadArray($config_array) {
+        if ($this->isFinalized('Cannot load directives after finalization')) return;
+        foreach ($config_array as $key => $value) {
+            $key = str_replace('_', '.', $key);
+            if (strpos($key, '.') !== false) {
+                // condensed form
+                list($namespace, $directive) = explode('.', $key);
+                $this->set($namespace, $directive, $value);
+            } else {
+                $namespace = $key;
+                $namespace_values = $value;
+                foreach ($namespace_values as $directive => $value) {
+                    $this->set($namespace, $directive, $value);
+                }
+            }
+        }
+    }
+    
+    /**
+     * Returns a list of array(namespace, directive) for all directives
+     * that are allowed in a web-form context as per an allowed
+     * namespaces/directives list.
+     * @param $allowed List of allowed namespaces/directives
+     */
+    public static function getAllowedDirectivesForForm($allowed) {
+        $schema = HTMLPurifier_ConfigSchema::instance();
+        if ($allowed !== true) {
+             if (is_string($allowed)) $allowed = array($allowed);
+             $allowed_ns = array();
+             $allowed_directives = array();
+             $blacklisted_directives = array();
+             foreach ($allowed as $ns_or_directive) {
+                 if (strpos($ns_or_directive, '.') !== false) {
+                     // directive
+                     if ($ns_or_directive[0] == '-') {
+                         $blacklisted_directives[substr($ns_or_directive, 1)] = true;
+                     } else {
+                         $allowed_directives[$ns_or_directive] = true;
+                     }
+                 } else {
+                     // namespace
+                     $allowed_ns[$ns_or_directive] = true;
+                 }
+             }
+        }
+        $ret = array();
+        foreach ($schema->info as $ns => $keypairs) {
+            foreach ($keypairs as $directive => $def) {
+                if ($allowed !== true) {
+                    if (isset($blacklisted_directives["$ns.$directive"])) continue;
+                    if (!isset($allowed_directives["$ns.$directive"]) && !isset($allowed_ns[$ns])) continue;
+                }
+                if ($def->class == 'alias') continue;
+                if ($directive == 'DefinitionID' || $directive == 'DefinitionRev') continue;
+                $ret[] = array($ns, $directive);
+            }
+        }
+        return $ret;
+    }
+    
+    /**
+     * Loads configuration values from $_GET/$_POST that were posted
+     * via ConfigForm
+     * @param $array $_GET or $_POST array to import
+     * @param $index Index/name that the config variables are in
+     * @param $allowed List of allowed namespaces/directives 
+     * @param $mq_fix Boolean whether or not to enable magic quotes fix
+     */
+    public static function loadArrayFromForm($array, $index, $allowed = true, $mq_fix = true) {
+        $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix);
+        $config = HTMLPurifier_Config::create($ret);
+        return $config;
+    }
+    
+    /**
+     * Merges in configuration values from $_GET/$_POST to object. NOT STATIC.
+     * @note Same parameters as loadArrayFromForm
+     */
+    public function mergeArrayFromForm($array, $index, $allowed = true, $mq_fix = true) {
+         $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix);
+         $this->loadArray($ret);
+    }
+    
+    /**
+     * Prepares an array from a form into something usable for the more
+     * strict parts of HTMLPurifier_Config
+     */
+    public static function prepareArrayFromForm($array, $index, $allowed = true, $mq_fix = true) {
+        $array = (isset($array[$index]) && is_array($array[$index])) ? $array[$index] : array();
+        $mq = get_magic_quotes_gpc() && $mq_fix;
+        
+        $allowed = HTMLPurifier_Config::getAllowedDirectivesForForm($allowed);
+        $ret = array();
+        foreach ($allowed as $key) {
+            list($ns, $directive) = $key;
+            $skey = "$ns.$directive";
+            if (!empty($array["Null_$skey"])) {
+                $ret[$ns][$directive] = null;
+                continue;
+            }
+            if (!isset($array[$skey])) continue;
+            $value = $mq ? stripslashes($array[$skey]) : $array[$skey];
+            $ret[$ns][$directive] = $value;
+        }
+        return $ret;
+    }
+    
+    /**
+     * Loads configuration values from an ini file
+     * @param $filename Name of ini file
+     */
+    public function loadIni($filename) {
+        if ($this->isFinalized('Cannot load directives after finalization')) return;
+        $array = parse_ini_file($filename, true);
+        $this->loadArray($array);
+    }
+    
+    /**
+     * Checks whether or not the configuration object is finalized.
+     * @param $error String error message, or false for no error
+     */
+    public function isFinalized($error = false) {
+        if ($this->finalized && $error) {
+            trigger_error($error, E_USER_ERROR);
+        }
+        return $this->finalized;
+    }
+    
+    /**
+     * Finalizes configuration only if auto finalize is on and not
+     * already finalized
+     */
+    public function autoFinalize() {
+        if (!$this->finalized && $this->autoFinalize) $this->finalize();
+    }
+    
+    /**
+     * Finalizes a configuration object, prohibiting further change
+     */
+    public function finalize() {
+        $this->finalized = true;
+    }
+    
+}
+
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ConfigDef.php

@@ -0,0 +1,9 @@
+<?php
+
+/**
+ * Base class for configuration entity
+ */
+class HTMLPurifier_ConfigDef {
+    public $class = false;
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ConfigDef/Directive.php

@@ -0,0 +1,79 @@
+<?php
+
+require_once 'HTMLPurifier/ConfigDef.php';
+
+/**
+ * Structure object containing definition of a directive.
+ * @note This structure does not contain default values
+ */
+class HTMLPurifier_ConfigDef_Directive extends HTMLPurifier_ConfigDef
+{
+    
+    public $class = 'directive';
+    
+    public function __construct(
+        $type = null,
+        $descriptions = null,
+        $allow_null = null,
+        $allowed = null,
+        $aliases = null
+    ) {
+        if (        $type !== null)         $this->type = $type;
+        if ($descriptions !== null) $this->descriptions = $descriptions;
+        if (  $allow_null !== null)   $this->allow_null = $allow_null;
+        if (     $allowed !== null)      $this->allowed = $allowed;
+        if (     $aliases !== null)      $this->aliases = $aliases;
+    }
+    
+    /**
+     * Allowed type of the directive. Values are:
+     *      - string
+     *      - istring (case insensitive string)
+     *      - int
+     *      - float
+     *      - bool
+     *      - lookup (array of value => true)
+     *      - list (regular numbered index array)
+     *      - hash (array of key => value)
+     *      - mixed (anything goes)
+     */
+    public $type = 'mixed';
+    
+    /**
+     * Plaintext descriptions of the configuration entity is. Organized by
+     * file and line number, so multiple descriptions are allowed.
+     */
+    public $descriptions = array();
+    
+    /**
+     * Is null allowed? Has no effect for mixed type.
+     * @bool
+     */
+    public $allow_null = false;
+    
+    /**
+     * Lookup table of allowed values of the element, bool true if all allowed.
+     */
+    public $allowed = true;
+    
+    /**
+     * Hash of value aliases, i.e. values that are equivalent.
+     */
+    public $aliases = array();
+    
+    /**
+     * Advisory list of directive aliases, i.e. other directives that
+     * redirect here
+     */
+    public $directiveAliases = array();
+    
+    /**
+     * Adds a description to the array
+     */
+    public function addDescription($file, $line, $description) {
+        if (!isset($this->descriptions[$file])) $this->descriptions[$file] = array();
+        $this->descriptions[$file][$line] = $description;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ConfigDef/DirectiveAlias.php

@@ -0,0 +1,26 @@
+<?php
+
+require_once 'HTMLPurifier/ConfigDef.php';
+
+/**
+ * Structure object describing a directive alias
+ */
+class HTMLPurifier_ConfigDef_DirectiveAlias extends HTMLPurifier_ConfigDef
+{
+    public $class = 'alias';
+    
+    /**
+     * Namespace being aliased to
+     */
+    public $namespace;
+    /**
+     * Directive being aliased to
+     */
+    public $name;
+    
+    public function __construct($namespace, $name) {
+        $this->namespace = $namespace;
+        $this->name = $name;
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ConfigDef/Namespace.php

@@ -0,0 +1,22 @@
+<?php
+
+require_once 'HTMLPurifier/ConfigDef.php';
+
+/**
+ * Structure object describing of a namespace
+ */
+class HTMLPurifier_ConfigDef_Namespace extends HTMLPurifier_ConfigDef {
+    
+    public function HTMLPurifier_ConfigDef_Namespace($description = null) {
+        $this->description = $description;
+    }
+    
+    public $class = 'namespace';
+    
+    /**
+     * String description of what kinds of directives go in this namespace.
+     */
+    public $description;
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ConfigSchema.php

@@ -0,0 +1,436 @@
+<?php
+
+require_once 'HTMLPurifier/Error.php';
+require_once 'HTMLPurifier/ConfigDef.php';
+require_once 'HTMLPurifier/ConfigDef/Namespace.php';
+require_once 'HTMLPurifier/ConfigDef/Directive.php';
+require_once 'HTMLPurifier/ConfigDef/DirectiveAlias.php';
+
+if (!defined('HTMLPURIFIER_SCHEMA_STRICT')) define('HTMLPURIFIER_SCHEMA_STRICT', false);
+
+/**
+ * Configuration definition, defines directives and their defaults.
+ * @note If you update this, please update Printer_ConfigForm
+ * @todo The ability to define things multiple times is confusing and should
+ *       be factored out to its own function named registerDependency() or 
+ *       addNote(), where only the namespace.name and an extra descriptions
+ *       documenting the nature of the dependency are needed.  Since it's
+ *       possible that the dependency is registered before the configuration
+ *       is defined, deferring it to some sort of cache until it actually
+ *       gets defined would be wise, keeping it opaque until it does get
+ *       defined. We could add a finalize() method which would cause it to
+ *       error out if we get a dangling dependency.  It's difficult, however,
+ *       to know whether or not it's a dependency, or a codependency, that is
+ *       neither of them fully depends on it. Where does the configuration go
+ *       then?  This could be partially resolved by allowing blanket definitions
+ *       and then splitting them up into finer-grained versions, however, there
+ *       might be implementation difficulties in ini files regarding order of
+ *       execution.
+ */
+class HTMLPurifier_ConfigSchema {
+    
+    /**
+     * Defaults of the directives and namespaces.
+     * @note This shares the exact same structure as HTMLPurifier_Config::$conf
+     */
+    public $defaults = array();
+    
+    /**
+     * Definition of the directives.
+     */
+    public $info = array();
+    
+    /**
+     * Definition of namespaces.
+     */
+    public $info_namespace = array();
+    
+    /**
+     * Lookup table of allowed types.
+     */
+    public $types = array(
+        'string'    => 'String',
+        'istring'   => 'Case-insensitive string',
+        'text'      => 'Text',
+        'itext'      => 'Case-insensitive text',
+        'int'       => 'Integer',
+        'float'     => 'Float',
+        'bool'      => 'Boolean',
+        'lookup'    => 'Lookup array',
+        'list'      => 'Array list',
+        'hash'      => 'Associative array',
+        'mixed'     => 'Mixed'
+    );
+    
+    /**
+     * Initializes the default namespaces.
+     */
+    public function initialize() {
+        $this->defineNamespace('Core', 'Core features that are always available.');
+        $this->defineNamespace('Attr', 'Features regarding attribute validation.');
+        $this->defineNamespace('URI', 'Features regarding Uniform Resource Identifiers.');
+        $this->defineNamespace('HTML', 'Configuration regarding allowed HTML.');
+        $this->defineNamespace('CSS', 'Configuration regarding allowed CSS.');
+        $this->defineNamespace('AutoFormat', 'Configuration for activating auto-formatting functionality (also known as <code>Injector</code>s)');
+        $this->defineNamespace('AutoFormatParam', 'Configuration for customizing auto-formatting functionality');
+        $this->defineNamespace('Filter', 'Configuration for filters');
+        $this->defineNamespace('Output', 'Configuration relating to the generation of (X)HTML.');
+        $this->defineNamespace('Cache', 'Configuration for DefinitionCache and related subclasses.');
+        $this->defineNamespace('Test', 'Developer testing configuration for our unit tests.');
+    }
+    
+    /**
+     * Retrieves an instance of the application-wide configuration definition.
+     */
+    public static function &instance($prototype = null) {
+        static $instance;
+        if ($prototype !== null) {
+            $instance = $prototype;
+        } elseif ($instance === null || $prototype === true) {
+            $instance = new HTMLPurifier_ConfigSchema();
+            $instance->initialize();
+        }
+        return $instance;
+    }
+    
+    /**
+     * Defines a directive for configuration
+     * @warning Will fail of directive's namespace is defined
+     * @param $namespace Namespace the directive is in
+     * @param $name Key of directive
+     * @param $default Default value of directive
+     * @param $type Allowed type of the directive. See
+     *      HTMLPurifier_DirectiveDef::$type for allowed values
+     * @param $description Description of directive for documentation
+     */
+    public static function define($namespace, $name, $default, $type, $description) {
+        $def =& HTMLPurifier_ConfigSchema::instance();
+        
+        // basic sanity checks
+        if (HTMLPURIFIER_SCHEMA_STRICT) {
+            if (!isset($def->info[$namespace])) {
+                trigger_error('Cannot define directive for undefined namespace',
+                    E_USER_ERROR);
+                return;
+            }
+            if (!ctype_alnum($name)) {
+                trigger_error('Directive name must be alphanumeric',
+                    E_USER_ERROR);
+                return;
+            }
+            if (empty($description)) {
+                trigger_error('Description must be non-empty',
+                    E_USER_ERROR);
+                return;
+            }
+        }
+        
+        if (isset($def->info[$namespace][$name])) {
+            // already defined
+            if (
+                $def->info[$namespace][$name]->type !== $type ||
+                $def->defaults[$namespace][$name]   !== $default
+            ) {
+                trigger_error('Inconsistent default or type, cannot redefine');
+                return;
+            }
+        } else {
+            // needs defining
+            
+            // process modifiers (OPTIMIZE!)
+            $type_values = explode('/', $type, 2);
+            $type = $type_values[0];
+            $modifier = isset($type_values[1]) ? $type_values[1] : false;
+            $allow_null = ($modifier === 'null');
+            
+            if (HTMLPURIFIER_SCHEMA_STRICT) {
+                if (!isset($def->types[$type])) {
+                    trigger_error('Invalid type for configuration directive',
+                        E_USER_ERROR);
+                    return;
+                }
+                $default = $def->validate($default, $type, $allow_null);
+                if ($def->isError($default)) {
+                    trigger_error('Default value does not match directive type',
+                        E_USER_ERROR);
+                    return;
+                }
+            }
+            
+            $def->info[$namespace][$name] =
+                new HTMLPurifier_ConfigDef_Directive();
+            $def->info[$namespace][$name]->type = $type;
+            $def->info[$namespace][$name]->allow_null = $allow_null;
+            $def->defaults[$namespace][$name]   = $default;
+        }
+        if (!HTMLPURIFIER_SCHEMA_STRICT) return;
+        $backtrace = debug_backtrace();
+        $file = $def->mungeFilename($backtrace[0]['file']);
+        $line = $backtrace[0]['line'];
+        $def->info[$namespace][$name]->addDescription($file,$line,$description);
+    }
+    
+    /**
+     * Defines a namespace for directives to be put into.
+     * @param $namespace Namespace's name
+     * @param $description Description of the namespace
+     */
+    public static function defineNamespace($namespace, $description) {
+        $def =& HTMLPurifier_ConfigSchema::instance();
+        if (HTMLPURIFIER_SCHEMA_STRICT) {
+            if (isset($def->info[$namespace])) {
+                trigger_error('Cannot redefine namespace', E_USER_ERROR);
+                return;
+            }
+            if (!ctype_alnum($namespace)) {
+                trigger_error('Namespace name must be alphanumeric',
+                    E_USER_ERROR);
+                return;
+            }
+            if (empty($description)) {
+                trigger_error('Description must be non-empty',
+                    E_USER_ERROR);
+                return;
+            }
+        }
+        $def->info[$namespace] = array();
+        $def->info_namespace[$namespace] = new HTMLPurifier_ConfigDef_Namespace();
+        $def->info_namespace[$namespace]->description = $description;
+        $def->defaults[$namespace] = array();
+    }
+    
+    /**
+     * Defines a directive value alias.
+     * 
+     * Directive value aliases are convenient for developers because it lets
+     * them set a directive to several values and get the same result.
+     * @param $namespace Directive's namespace
+     * @param $name Name of Directive
+     * @param $alias Name of aliased value
+     * @param $real Value aliased value will be converted into
+     */
+    public static function defineValueAliases($namespace, $name, $aliases) {
+        $def =& HTMLPurifier_ConfigSchema::instance();
+        if (HTMLPURIFIER_SCHEMA_STRICT && !isset($def->info[$namespace][$name])) {
+            trigger_error('Cannot set value alias for non-existant directive',
+                E_USER_ERROR);
+            return;
+        }
+        foreach ($aliases as $alias => $real) {
+            if (HTMLPURIFIER_SCHEMA_STRICT) {
+                if (!$def->info[$namespace][$name] !== true &&
+                    !isset($def->info[$namespace][$name]->allowed[$real])
+                ) {
+                    trigger_error('Cannot define alias to value that is not allowed',
+                        E_USER_ERROR);
+                    return;
+                }
+                if (isset($def->info[$namespace][$name]->allowed[$alias])) {
+                    trigger_error('Cannot define alias over allowed value',
+                        E_USER_ERROR);
+                    return;
+                }
+            }
+            $def->info[$namespace][$name]->aliases[$alias] = $real;
+        }
+    }
+    
+    /**
+     * Defines a set of allowed values for a directive.
+     * @param $namespace Namespace of directive
+     * @param $name Name of directive
+     * @param $allowed_values Arraylist of allowed values
+     */
+    public static function defineAllowedValues($namespace, $name, $allowed_values) {
+        $def =& HTMLPurifier_ConfigSchema::instance();
+        if (HTMLPURIFIER_SCHEMA_STRICT && !isset($def->info[$namespace][$name])) {
+            trigger_error('Cannot define allowed values for undefined directive',
+                E_USER_ERROR);
+            return;
+        }
+        $directive =& $def->info[$namespace][$name];
+        $type = $directive->type;
+        if (HTMLPURIFIER_SCHEMA_STRICT && $type != 'string' && $type != 'istring') {
+            trigger_error('Cannot define allowed values for directive whose type is not string',
+                E_USER_ERROR);
+            return;
+        }
+        if ($directive->allowed === true) {
+            $directive->allowed = array();
+        }
+        foreach ($allowed_values as $value) {
+            $directive->allowed[$value] = true;
+        }
+        if (
+            HTMLPURIFIER_SCHEMA_STRICT &&
+            $def->defaults[$namespace][$name] !== null &&
+            !isset($directive->allowed[$def->defaults[$namespace][$name]])
+        ) {
+            trigger_error('Default value must be in allowed range of variables',
+                E_USER_ERROR);
+            $directive->allowed = true; // undo undo!
+            return;
+        }
+    }
+    
+    /**
+     * Defines a directive alias for backwards compatibility
+     * @param $namespace
+     * @param $name Directive that will be aliased
+     * @param $new_namespace
+     * @param $new_name Directive that the alias will be to
+     */
+    public static function defineAlias($namespace, $name, $new_namespace, $new_name) {
+        $def =& HTMLPurifier_ConfigSchema::instance();
+        if (HTMLPURIFIER_SCHEMA_STRICT) {
+            if (!isset($def->info[$namespace])) {
+                trigger_error('Cannot define directive alias in undefined namespace',
+                    E_USER_ERROR);
+                return;
+            }
+            if (!ctype_alnum($name)) {
+                trigger_error('Directive name must be alphanumeric',
+                    E_USER_ERROR);
+                return;
+            }
+            if (isset($def->info[$namespace][$name])) {
+                trigger_error('Cannot define alias over directive',
+                    E_USER_ERROR);
+                return;
+            }
+            if (!isset($def->info[$new_namespace][$new_name])) {
+                trigger_error('Cannot define alias to undefined directive',
+                    E_USER_ERROR);
+                return;
+            }
+            if ($def->info[$new_namespace][$new_name]->class == 'alias') {
+                trigger_error('Cannot define alias to alias',
+                    E_USER_ERROR);
+                return;
+            }
+        }
+        $def->info[$namespace][$name] =
+            new HTMLPurifier_ConfigDef_DirectiveAlias(
+                $new_namespace, $new_name);
+        $def->info[$new_namespace][$new_name]->directiveAliases[] = "$namespace.$name";
+    }
+    
+    /**
+     * Validate a variable according to type. Return null if invalid.
+     * @todo Consider making protected
+     */
+    public function validate($var, $type, $allow_null = false) {
+        if (!isset($this->types[$type])) {
+            trigger_error('Invalid type', E_USER_ERROR);
+            return;
+        }
+        if ($allow_null && $var === null) return null;
+        switch ($type) {
+            case 'mixed':
+                //if (is_string($var)) $var = unserialize($var);
+                return $var;
+            case 'istring':
+            case 'string':
+            case 'text': // no difference, just is longer/multiple line string
+            case 'itext':
+                if (!is_string($var)) break;
+                if ($type === 'istring' || $type === 'itext') $var = strtolower($var);
+                return $var;
+            case 'int':
+                if (is_string($var) && ctype_digit($var)) $var = (int) $var;
+                elseif (!is_int($var)) break;
+                return $var;
+            case 'float':
+                if (is_string($var) && is_numeric($var)) $var = (float) $var;
+                elseif (!is_float($var)) break;
+                return $var;
+            case 'bool':
+                if (is_int($var) && ($var === 0 || $var === 1)) {
+                    $var = (bool) $var;
+                } elseif (is_string($var)) {
+                    if ($var == 'on' || $var == 'true' || $var == '1') {
+                        $var = true;
+                    } elseif ($var == 'off' || $var == 'false' || $var == '0') {
+                        $var = false;
+                    } else {
+                        break;
+                    }
+                } elseif (!is_bool($var)) break;
+                return $var;
+            case 'list':
+            case 'hash':
+            case 'lookup':
+                if (is_string($var)) {
+                    // special case: technically, this is an array with
+                    // a single empty string item, but having an empty
+                    // array is more intuitive
+                    if ($var == '') return array();
+                    if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
+                        // simplistic string to array method that only works
+                        // for simple lists of tag names or alphanumeric characters
+                        $var = explode(',',$var);
+                    } else {
+                        $var = preg_split('/(,|[\n\r]+)/', $var);
+                    }
+                    // remove spaces
+                    foreach ($var as $i => $j) $var[$i] = trim($j);
+                    if ($type === 'hash') {
+                        // key:value,key2:value2
+                        $nvar = array();
+                        foreach ($var as $keypair) {
+                            $c = explode(':', $keypair, 2);
+                            if (!isset($c[1])) continue;
+                            $nvar[$c[0]] = $c[1];
+                        }
+                        $var = $nvar;
+                    }
+                }
+                if (!is_array($var)) break;
+                $keys = array_keys($var);
+                if ($keys === array_keys($keys)) {
+                    if ($type == 'list') return $var;
+                    elseif ($type == 'lookup') {
+                        $new = array();
+                        foreach ($var as $key) {
+                            $new[$key] = true;
+                        }
+                        return $new;
+                    } else break;
+                }
+                if ($type === 'lookup') {
+                    foreach ($var as $key => $value) {
+                        $var[$key] = true;
+                    }
+                }
+                return $var;
+        }
+        $error = new HTMLPurifier_Error();
+        return $error;
+    }
+    
+    /**
+     * Takes an absolute path and munges it into a more manageable relative path
+     * @todo Consider making protected
+     * @param $filename Filename to check
+     * @return string munged filename
+     */
+    public function mungeFilename($filename) {
+        if (!HTMLPURIFIER_SCHEMA_STRICT) return $filename;
+        $offset = strrpos($filename, 'HTMLPurifier');
+        $filename = substr($filename, $offset);
+        $filename = str_replace('\\', '/', $filename);
+        return $filename;
+    }
+    
+    /**
+     * Checks if var is an HTMLPurifier_Error object
+     * @todo Consider making protected
+     */
+    public function isError($var) {
+        if (!is_object($var)) return false;
+        if (!($var instanceof HTMLPurifier_Error)) return false;
+        return true;
+    }
+}
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ContentSets.php

@@ -0,0 +1,149 @@
+<?php
+
+// common defs that we'll support by default
+require_once 'HTMLPurifier/ChildDef.php';
+require_once 'HTMLPurifier/ChildDef/Empty.php';
+require_once 'HTMLPurifier/ChildDef/Required.php';
+require_once 'HTMLPurifier/ChildDef/Optional.php';
+require_once 'HTMLPurifier/ChildDef/Custom.php';
+
+/**
+ * @todo Unit test
+ */
+class HTMLPurifier_ContentSets
+{
+    
+    /**
+     * List of content set strings (pipe seperators) indexed by name.
+     */
+    public $info = array();
+    
+    /**
+     * List of content set lookups (element => true) indexed by name.
+     * @note This is in HTMLPurifier_HTMLDefinition->info_content_sets
+     */
+    public $lookup = array();
+    
+    /**
+     * Synchronized list of defined content sets (keys of info)
+     */
+    protected $keys = array();
+    /**
+     * Synchronized list of defined content values (values of info)
+     */
+    protected $values = array();
+    
+    /**
+     * Merges in module's content sets, expands identifiers in the content
+     * sets and populates the keys, values and lookup member variables.
+     * @param $modules List of HTMLPurifier_HTMLModule
+     */
+    public function __construct($modules) {
+        if (!is_array($modules)) $modules = array($modules);
+        // populate content_sets based on module hints
+        // sorry, no way of overloading
+        foreach ($modules as $module_i => $module) {
+            foreach ($module->content_sets as $key => $value) {
+                if (isset($this->info[$key])) {
+                    // add it into the existing content set
+                    $this->info[$key] = $this->info[$key] . ' | ' . $value;
+                } else {
+                    $this->info[$key] = $value;
+                }
+            }
+        }
+        // perform content_set expansions
+        $this->keys = array_keys($this->info);
+        foreach ($this->info as $i => $set) {
+            // only performed once, so infinite recursion is not
+            // a problem
+            $this->info[$i] =
+                str_replace(
+                    $this->keys,
+                    // must be recalculated each time due to
+                    // changing substitutions
+                    array_values($this->info),
+                $set);
+        }
+        $this->values = array_values($this->info);
+        
+        // generate lookup tables
+        foreach ($this->info as $name => $set) {
+            $this->lookup[$name] = $this->convertToLookup($set);
+        }
+    }
+    
+    /**
+     * Accepts a definition; generates and assigns a ChildDef for it
+     * @param $def HTMLPurifier_ElementDef reference
+     * @param $module Module that defined the ElementDef
+     */
+    public function generateChildDef(&$def, $module) {
+        if (!empty($def->child)) return; // already done!
+        $content_model = $def->content_model;
+        if (is_string($content_model)) {
+            $def->content_model = str_replace(
+                $this->keys, $this->values, $content_model);
+        }
+        $def->child = $this->getChildDef($def, $module);
+    }
+    
+    /**
+     * Instantiates a ChildDef based on content_model and content_model_type
+     * member variables in HTMLPurifier_ElementDef
+     * @note This will also defer to modules for custom HTMLPurifier_ChildDef
+     *       subclasses that need content set expansion
+     * @param $def HTMLPurifier_ElementDef to have ChildDef extracted
+     * @return HTMLPurifier_ChildDef corresponding to ElementDef
+     */
+    public function getChildDef($def, $module) {
+        $value = $def->content_model;
+        if (is_object($value)) {
+            trigger_error(
+                'Literal object child definitions should be stored in '.
+                'ElementDef->child not ElementDef->content_model',
+                E_USER_NOTICE
+            );
+            return $value;
+        }
+        switch ($def->content_model_type) {
+            case 'required':
+                return new HTMLPurifier_ChildDef_Required($value);
+            case 'optional':
+                return new HTMLPurifier_ChildDef_Optional($value);
+            case 'empty':
+                return new HTMLPurifier_ChildDef_Empty();
+            case 'custom':
+                return new HTMLPurifier_ChildDef_Custom($value);
+        }
+        // defer to its module
+        $return = false;
+        if ($module->defines_child_def) { // save a func call
+            $return = $module->getChildDef($def);
+        }
+        if ($return !== false) return $return;
+        // error-out
+        trigger_error(
+            'Could not determine which ChildDef class to instantiate',
+            E_USER_ERROR
+        );
+        return false;
+    }
+    
+    /**
+     * Converts a string list of elements separated by pipes into
+     * a lookup array.
+     * @param $string List of elements
+     * @return Lookup array of elements
+     */
+    protected function convertToLookup($string) {
+        $array = explode('|', str_replace(' ', '', $string));
+        $ret = array();
+        foreach ($array as $i => $k) {
+            $ret[$k] = true;
+        }
+        return $ret;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Context.php

@@ -0,0 +1,79 @@
+<?php
+
+/**
+ * Registry object that contains information about the current context.
+ * @warning Is a bit buggy when variables are set to null: it thinks
+ *          they don't exist! So use false instead, please.
+ */
+class HTMLPurifier_Context
+{
+    
+    /**
+     * Private array that stores the references.
+     */
+    private $_storage = array();
+    
+    /**
+     * Registers a variable into the context.
+     * @param $name String name
+     * @param $ref Variable to be registered
+     */
+    public function register($name, &$ref) {
+        if (isset($this->_storage[$name])) {
+            trigger_error("Name $name produces collision, cannot re-register",
+                          E_USER_ERROR);
+            return;
+        }
+        $this->_storage[$name] =& $ref;
+    }
+    
+    /**
+     * Retrieves a variable reference from the context.
+     * @param $name String name
+     * @param $ignore_error Boolean whether or not to ignore error
+     */
+    public function &get($name, $ignore_error = false) {
+        if (!isset($this->_storage[$name])) {
+            if (!$ignore_error) {
+                trigger_error("Attempted to retrieve non-existent variable $name",
+                              E_USER_ERROR);
+            }
+            $var = null; // so we can return by reference
+            return $var;
+        }
+        return $this->_storage[$name];
+    }
+    
+    /**
+     * Destorys a variable in the context.
+     * @param $name String name
+     */
+    public function destroy($name) {
+        if (!isset($this->_storage[$name])) {
+            trigger_error("Attempted to destroy non-existent variable $name",
+                          E_USER_ERROR);
+            return;
+        }
+        unset($this->_storage[$name]);
+    }
+    
+    /**
+     * Checks whether or not the variable exists.
+     * @param $name String name
+     */
+    public function exists($name) {
+        return isset($this->_storage[$name]);
+    }
+    
+    /**
+     * Loads a series of variables from an associative array
+     * @param $context_array Assoc array of variables to load
+     */
+    public function loadArray($context_array) {
+        foreach ($context_array as $key => $discard) {
+            $this->register($key, $context_array[$key]);
+        }
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Definition.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * Super-class for definition datatype objects, implements serialization
+ * functions for the class.
+ */
+abstract class HTMLPurifier_Definition
+{
+    
+    /**
+     * Has setup() been called yet?
+     */
+    public $setup = false;
+    
+    /**
+     * What type of definition is it?
+     */
+    public $type;
+    
+    /**
+     * Sets up the definition object into the final form, something
+     * not done by the constructor
+     * @param $config HTMLPurifier_Config instance
+     */
+    abstract protected function doSetup($config);
+    
+    /**
+     * Setup function that aborts if already setup
+     * @param $config HTMLPurifier_Config instance
+     */
+    public function setup($config) {
+        if ($this->setup) return;
+        $this->setup = true;
+        $this->doSetup($config);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache.php

@@ -0,0 +1,114 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache/Serializer.php';
+require_once 'HTMLPurifier/DefinitionCache/Null.php';
+
+require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
+require_once 'HTMLPurifier/DefinitionCache/Decorator/Memory.php';
+require_once 'HTMLPurifier/DefinitionCache/Decorator/Cleanup.php';
+
+/**
+ * Abstract class representing Definition cache managers that implements
+ * useful common methods and is a factory.
+ * @todo Create a separate maintenance file advanced users can use to
+ *       cache their custom HTMLDefinition, which can be loaded
+ *       via a configuration directive
+ * @todo Implement memcached
+ */
+abstract class HTMLPurifier_DefinitionCache
+{
+    
+    public $type;
+    
+    /**
+     * @param $name Type of definition objects this instance of the
+     *      cache will handle.
+     */
+    public function __construct($type) {
+        $this->type = $type;
+    }
+    
+    /**
+     * Generates a unique identifier for a particular configuration
+     * @param Instance of HTMLPurifier_Config
+     */
+    public function generateKey($config) {
+        return $config->version . '-' . // possibly replace with function calls
+               $config->getBatchSerial($this->type) . '-' .
+               $config->get($this->type, 'DefinitionRev');
+    }
+    
+    /**
+     * Tests whether or not a key is old with respect to the configuration's
+     * version and revision number.
+     * @param $key Key to test
+     * @param $config Instance of HTMLPurifier_Config to test against
+     */
+    public function isOld($key, $config) {
+        if (substr_count($key, '-') < 2) return true;
+        list($version, $hash, $revision) = explode('-', $key, 3);
+        $compare = version_compare($version, $config->version);
+        // version mismatch, is always old
+        if ($compare != 0) return true;
+        // versions match, ids match, check revision number
+        if (
+            $hash == $config->getBatchSerial($this->type) &&
+            $revision < $config->get($this->type, 'DefinitionRev')
+        ) return true;
+        return false;
+    }
+    
+    /**
+     * Checks if a definition's type jives with the cache's type
+     * @note Throws an error on failure
+     * @param $def Definition object to check
+     * @return Boolean true if good, false if not
+     */
+    public function checkDefType($def) {
+        if ($def->type !== $this->type) {
+            trigger_error("Cannot use definition of type {$def->type} in cache for {$this->type}");
+            return false;
+        }
+        return true;
+    }
+    
+    /**
+     * Adds a definition object to the cache
+     */
+    abstract public function add($def, $config);
+    
+    /**
+     * Unconditionally saves a definition object to the cache
+     */
+    abstract public function set($def, $config);
+    
+    /**
+     * Replace an object in the cache
+     */
+    abstract public function replace($def, $config);
+    
+    /**
+     * Retrieves a definition object from the cache
+     */
+    abstract public function get($config);
+    
+    /**
+     * Removes a definition object to the cache
+     */
+    abstract public function remove($config);
+    
+    /**
+     * Clears all objects from cache
+     */
+    abstract public function flush($config);
+    
+    /**
+     * Clears all expired (older version or revision) objects from cache
+     * @note Be carefuly implementing this method as flush. Flush must
+     *       not interfere with other Definition types, and cleanup()
+     *       should not be repeatedly called by userland code.
+     */
+    abstract public function cleanup($config);
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache/Decorator.php

@@ -0,0 +1,63 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache.php';
+
+class HTMLPurifier_DefinitionCache_Decorator extends HTMLPurifier_DefinitionCache
+{
+    
+    /**
+     * Cache object we are decorating
+     */
+    public $cache;
+    
+    public function __construct() {}
+    
+    /**
+     * Lazy decorator function
+     * @param $cache Reference to cache object to decorate
+     */
+    public function decorate(&$cache) {
+        $decorator = $this->copy();
+        // reference is necessary for mocks in PHP 4
+        $decorator->cache =& $cache;
+        $decorator->type  = $cache->type;
+        return $decorator;
+    }
+    
+    /**
+     * Cross-compatible clone substitute
+     */
+    public function copy() {
+        return new HTMLPurifier_DefinitionCache_Decorator();
+    }
+    
+    public function add($def, $config) {
+        return $this->cache->add($def, $config);
+    }
+    
+    public function set($def, $config) {
+        return $this->cache->set($def, $config);
+    }
+    
+    public function replace($def, $config) {
+        return $this->cache->replace($def, $config);
+    }
+    
+    public function get($config) {
+        return $this->cache->get($config);
+    }
+    
+    public function remove($config) {
+        return $this->cache->remove($config);
+    }
+    
+    public function flush($config) {
+        return $this->cache->flush($config);
+    }
+    
+    public function cleanup($config) {
+        return $this->cache->cleanup($config);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php

@@ -0,0 +1,44 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
+
+/**
+ * Definition cache decorator class that cleans up the cache
+ * whenever there is a cache miss.
+ */
+class HTMLPurifier_DefinitionCache_Decorator_Cleanup extends
+      HTMLPurifier_DefinitionCache_Decorator
+{
+    
+    public $name = 'Cleanup';
+    
+    public function copy() {
+        return new HTMLPurifier_DefinitionCache_Decorator_Cleanup();
+    }
+    
+    public function add($def, $config) {
+        $status = parent::add($def, $config);
+        if (!$status) parent::cleanup($config);
+        return $status;
+    }
+    
+    public function set($def, $config) {
+        $status = parent::set($def, $config);
+        if (!$status) parent::cleanup($config);
+        return $status;
+    }
+    
+    public function replace($def, $config) {
+        $status = parent::replace($def, $config);
+        if (!$status) parent::cleanup($config);
+        return $status;
+    }
+    
+    public function get($config) {
+        $ret = parent::get($config);
+        if (!$ret) parent::cleanup($config);
+        return $ret;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache/Decorator/Memory.php

@@ -0,0 +1,47 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
+
+/**
+ * Definition cache decorator class that saves all cache retrievals
+ * to PHP's memory; good for unit tests or circumstances where 
+ * there are lots of configuration objects floating around.
+ */
+class HTMLPurifier_DefinitionCache_Decorator_Memory extends
+      HTMLPurifier_DefinitionCache_Decorator
+{
+    
+    protected $definitions;
+    public $name = 'Memory';
+    
+    public function copy() {
+        return new HTMLPurifier_DefinitionCache_Decorator_Memory();
+    }
+    
+    public function add($def, $config) {
+        $status = parent::add($def, $config);
+        if ($status) $this->definitions[$this->generateKey($config)] = $def;
+        return $status;
+    }
+    
+    public function set($def, $config) {
+        $status = parent::set($def, $config);
+        if ($status) $this->definitions[$this->generateKey($config)] = $def;
+        return $status;
+    }
+    
+    public function replace($def, $config) {
+        $status = parent::replace($def, $config);
+        if ($status) $this->definitions[$this->generateKey($config)] = $def;
+        return $status;
+    }
+    
+    public function get($config) {
+        $key = $this->generateKey($config);
+        if (isset($this->definitions[$key])) return $this->definitions[$key];
+        $this->definitions[$key] = parent::get($config);
+        return $this->definitions[$key];
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache/Decorator/Template.php.in

@@ -0,0 +1,46 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
+
+/**
+ * Definition cache decorator template.
+ */
+class HTMLPurifier_DefinitionCache_Decorator_Template extends
+      HTMLPurifier_DefinitionCache_Decorator
+{
+    
+    var $name = 'Template'; // replace this
+    
+    function copy() {
+        // replace class name with yours
+        return new HTMLPurifier_DefinitionCache_Decorator_Template();
+    }
+    
+    // remove methods you don't need
+    
+    function add($def, $config) {
+        return parent::add($def, $config);
+    }
+    
+    function set($def, $config) {
+        return parent::set($def, $config);
+    }
+    
+    function replace($def, $config) {
+        return parent::replace($def, $config);
+    }
+    
+    function get($config) {
+        return parent::get($config);
+    }
+    
+    function flush() {
+        return parent::flush();
+    }
+    
+    function cleanup($config) {
+        return parent::cleanup($config);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache/Null.php

@@ -0,0 +1,40 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache.php';
+
+/**
+ * Null cache object to use when no caching is on.
+ */
+class HTMLPurifier_DefinitionCache_Null extends HTMLPurifier_DefinitionCache
+{
+    
+    public function add($def, $config) {
+        return false;
+    }
+    
+    public function set($def, $config) {
+        return false;
+    }
+    
+    public function replace($def, $config) {
+        return false;
+    }
+    
+    public function remove($config) {
+        return false;
+    }
+    
+    public function get($config) {
+        return false;
+    }
+    
+    public function flush($config) {
+        return false;
+    }
+    
+    public function cleanup($config) {
+        return false;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCache/Serializer.php

@@ -0,0 +1,193 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'Cache', 'SerializerPath', null, 'string/null', '
+<p>
+    Absolute path with no trailing slash to store serialized definitions in.
+    Default is within the
+    HTML Purifier library inside DefinitionCache/Serializer. This
+    path must be writable by the webserver. This directive has been
+    available since 2.0.0.
+</p>
+');
+
+class HTMLPurifier_DefinitionCache_Serializer extends
+      HTMLPurifier_DefinitionCache
+{
+    
+    public function add($def, $config) {
+        if (!$this->checkDefType($def)) return;
+        $file = $this->generateFilePath($config);
+        if (file_exists($file)) return false;
+        if (!$this->_prepareDir($config)) return false;
+        return $this->_write($file, serialize($def));
+    }
+    
+    public function set($def, $config) {
+        if (!$this->checkDefType($def)) return;
+        $file = $this->generateFilePath($config);
+        if (!$this->_prepareDir($config)) return false;
+        return $this->_write($file, serialize($def));
+    }
+    
+    public function replace($def, $config) {
+        if (!$this->checkDefType($def)) return;
+        $file = $this->generateFilePath($config);
+        if (!file_exists($file)) return false;
+        if (!$this->_prepareDir($config)) return false;
+        return $this->_write($file, serialize($def));
+    }
+    
+    public function get($config) {
+        $file = $this->generateFilePath($config);
+        if (!file_exists($file)) return false;
+        return unserialize(file_get_contents($file));
+    }
+    
+    public function remove($config) {
+        $file = $this->generateFilePath($config);
+        if (!file_exists($file)) return false;
+        return unlink($file);
+    }
+    
+    public function flush($config) {
+        if (!$this->_prepareDir($config)) return false;
+        $dir = $this->generateDirectoryPath($config);
+        $dh  = opendir($dir);
+        while (false !== ($filename = readdir($dh))) {
+            if (empty($filename)) continue;
+            if ($filename[0] === '.') continue;
+            unlink($dir . '/' . $filename);
+        }
+    }
+    
+    public function cleanup($config) {
+        if (!$this->_prepareDir($config)) return false;
+        $dir = $this->generateDirectoryPath($config);
+        $dh  = opendir($dir);
+        while (false !== ($filename = readdir($dh))) {
+            if (empty($filename)) continue;
+            if ($filename[0] === '.') continue;
+            $key = substr($filename, 0, strlen($filename) - 4);
+            if ($this->isOld($key, $config)) unlink($dir . '/' . $filename);
+        }
+    }
+    
+    /**
+     * Generates the file path to the serial file corresponding to
+     * the configuration and definition name
+     * @todo Make protected
+     */
+    public function generateFilePath($config) {
+        $key = $this->generateKey($config);
+        return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
+    }
+    
+    /**
+     * Generates the path to the directory contain this cache's serial files
+     * @note No trailing slash
+     * @todo Make protected
+     */
+    public function generateDirectoryPath($config) {
+        $base = $this->generateBaseDirectoryPath($config);
+        return $base . '/' . $this->type;
+    }
+    
+    /**
+     * Generates path to base directory that contains all definition type
+     * serials
+     * @todo Make protected
+     */
+    public function generateBaseDirectoryPath($config) {
+        $base = $config->get('Cache', 'SerializerPath');
+        $base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base;
+        return $base;
+    }
+    
+    /**
+     * Convenience wrapper function for file_put_contents
+     * @param $file File name to write to
+     * @param $data Data to write into file
+     * @return Number of bytes written if success, or false if failure.
+     */
+    private function _write($file, $data) {
+        static $file_put_contents;
+        if ($file_put_contents === null) {
+            $file_put_contents = function_exists('file_put_contents');
+        }
+        if ($file_put_contents) {
+            return file_put_contents($file, $data);
+        }
+        $fh = fopen($file, 'w');
+        if (!$fh) return false;
+        $status = fwrite($fh, $data);
+        fclose($fh);
+        return $status;
+    }
+    
+    /**
+     * Prepares the directory that this type stores the serials in
+     * @return True if successful
+     */
+    private function _prepareDir($config) {
+        $directory = $this->generateDirectoryPath($config);
+        if (!is_dir($directory)) {
+            $base = $this->generateBaseDirectoryPath($config);
+            if (!is_dir($base)) {
+                trigger_error('Base directory '.$base.' does not exist,
+                    please create or change using %Cache.SerializerPath',
+                    E_USER_ERROR);
+                return false;
+            } elseif (!$this->_testPermissions($base)) {
+                return false;
+            }
+            mkdir($directory);
+        } elseif (!$this->_testPermissions($directory)) {
+            return false;
+        }
+        return true;
+    }
+    
+    /**
+     * Tests permissions on a directory and throws out friendly
+     * error messages and attempts to chmod it itself if possible
+     */
+    private function _testPermissions($dir) {
+        // early abort, if it is writable, everything is hunky-dory
+        if (is_writable($dir)) return true;
+        if (!is_dir($dir)) {
+            // generally, you'll want to handle this beforehand
+            // so a more specific error message can be given
+            trigger_error('Directory '.$dir.' does not exist',
+                E_USER_ERROR);
+            return false;
+        }
+        if (function_exists('posix_getuid')) {
+            // POSIX system, we can give more specific advice
+            if (fileowner($dir) === posix_getuid()) {
+                // we can chmod it ourselves
+                chmod($dir, 0755);
+                return true;
+            } elseif (filegroup($dir) === posix_getgid()) {
+                $chmod = '775';
+            } else {
+                // PHP's probably running as nobody, so we'll
+                // need to give global permissions
+                $chmod = '777';
+            }
+            trigger_error('Directory '.$dir.' not writable, '.
+                'please chmod to ' . $chmod,
+                E_USER_ERROR);
+        } else {
+            // generic error message
+            trigger_error('Directory '.$dir.' not writable, '.
+                'please alter file permissions',
+                E_USER_ERROR);
+        }
+        return false;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DefinitionCacheFactory.php

@@ -0,0 +1,107 @@
+<?php
+
+require_once 'HTMLPurifier/DefinitionCache.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'Cache', 'DefinitionImpl', 'Serializer', 'string/null', '
+This directive defines which method to use when caching definitions,
+the complex data-type that makes HTML Purifier tick. Set to null
+to disable caching (not recommended, as you will see a definite
+performance degradation). This directive has been available since 2.0.0.
+');
+
+HTMLPurifier_ConfigSchema::defineAlias(
+    'Core', 'DefinitionCache',
+    'Cache', 'DefinitionImpl'
+);
+
+
+/**
+ * Responsible for creating definition caches.
+ */
+class HTMLPurifier_DefinitionCacheFactory
+{
+    
+    protected $caches = array('Serializer' => array());
+    protected $implementations = array();
+    protected $decorators = array();
+    
+    /**
+     * Initialize default decorators
+     */
+    public function setup() {
+        $this->addDecorator('Cleanup');
+    }
+    
+    /**
+     * Retrieves an instance of global definition cache factory.
+     */
+    public static function &instance($prototype = null) {
+        static $instance;
+        if ($prototype !== null) {
+            $instance = $prototype;
+        } elseif ($instance === null || $prototype === true) {
+            $instance = new HTMLPurifier_DefinitionCacheFactory();
+            $instance->setup();
+        }
+        return $instance;
+    }
+    
+    /**
+     * Registers a new definition cache object
+     * @param $short Short name of cache object, for reference
+     * @param $long Full class name of cache object, for construction 
+     */
+    public function register($short, $long) {
+        $this->implementations[$short] = $long;
+    }
+    
+    /**
+     * Factory method that creates a cache object based on configuration
+     * @param $name Name of definitions handled by cache
+     * @param $config Instance of HTMLPurifier_Config
+     */
+    public function &create($type, $config) {
+        $method = $config->get('Cache', 'DefinitionImpl');
+        if ($method === null) {
+            $null = new HTMLPurifier_DefinitionCache_Null($type);
+            return $null;
+        }
+        if (!empty($this->caches[$method][$type])) {
+            return $this->caches[$method][$type];
+        }
+        if (
+          isset($this->implementations[$method]) &&
+          class_exists($class = $this->implementations[$method], false)
+        ) {
+            $cache = new $class($type);
+        } else {
+            if ($method != 'Serializer') {
+                trigger_error("Unrecognized DefinitionCache $method, using Serializer instead", E_USER_WARNING);
+            }
+            $cache = new HTMLPurifier_DefinitionCache_Serializer($type);
+        }
+        foreach ($this->decorators as $decorator) {
+            $new_cache = $decorator->decorate($cache);
+            // prevent infinite recursion in PHP 4
+            unset($cache);
+            $cache = $new_cache;
+        }
+        $this->caches[$method][$type] = $cache;
+        return $this->caches[$method][$type];
+    }
+    
+    /**
+     * Registers a decorator to add to all new cache objects
+     * @param 
+     */
+    public function addDecorator($decorator) {
+        if (is_string($decorator)) {
+            $class = "HTMLPurifier_DefinitionCache_Decorator_$decorator";
+            $decorator = new $class;
+        }
+        $this->decorators[$decorator->name] = $decorator;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Doctype.php

@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * Represents a document type, contains information on which modules
+ * need to be loaded.
+ * @note This class is inspected by Printer_HTMLDefinition->renderDoctype.
+ *       If structure changes, please update that function.
+ */
+class HTMLPurifier_Doctype
+{
+    /**
+     * Full name of doctype
+     */
+    public $name;
+    
+    /**
+     * List of standard modules (string identifiers or literal objects)
+     * that this doctype uses
+     */
+    public $modules = array();
+    
+    /**
+     * List of modules to use for tidying up code
+     */
+    public $tidyModules = array();
+    
+    /**
+     * Is the language derived from XML (i.e. XHTML)?
+     */
+    public $xml = true;
+    
+    /**
+     * List of aliases for this doctype
+     */
+    public $aliases = array();
+    
+    /**
+     * Public DTD identifier
+     */
+    public $dtdPublic;
+    
+    /**
+     * System DTD identifier
+     */
+    public $dtdSystem;
+    
+    public function __construct($name = null, $xml = true, $modules = array(),
+        $tidyModules = array(), $aliases = array(), $dtd_public = null, $dtd_system = null
+    ) {
+        $this->name         = $name;
+        $this->xml          = $xml;
+        $this->modules      = $modules;
+        $this->tidyModules  = $tidyModules;
+        $this->aliases      = $aliases;
+        $this->dtdPublic    = $dtd_public;
+        $this->dtdSystem    = $dtd_system;
+    }
+    
+    /**
+     * Clones the doctype, use before resolving modes and the like
+     */
+    public function copy() {
+        return unserialize(serialize($this));
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/DoctypeRegistry.php

@@ -0,0 +1,122 @@
+<?php
+
+require_once 'HTMLPurifier/Doctype.php';
+
+// Legacy directives for doctype specification
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'Strict', false, 'bool',
+    'Determines whether or not to use Transitional (loose) or Strict rulesets. '.
+    'This directive is deprecated in favor of %HTML.Doctype. '.
+    'This directive has been available since 1.3.0.'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'XHTML', true, 'bool',
+    'Determines whether or not output is XHTML 1.0 or HTML 4.01 flavor. '.
+    'This directive is deprecated in favor of %HTML.Doctype. '.
+    'This directive was available since 1.1.'
+);
+HTMLPurifier_ConfigSchema::defineAlias('Core', 'XHTML', 'HTML', 'XHTML');
+
+class HTMLPurifier_DoctypeRegistry
+{
+    
+    /**
+     * Hash of doctype names to doctype objects
+     */
+    protected $doctypes;
+    
+    /**
+     * Lookup table of aliases to real doctype names
+     */
+    protected $aliases;
+    
+    /**
+     * Registers a doctype to the registry
+     * @note Accepts a fully-formed doctype object, or the
+     *       parameters for constructing a doctype object
+     * @param $doctype Name of doctype or literal doctype object
+     * @param $modules Modules doctype will load
+     * @param $modules_for_modes Modules doctype will load for certain modes
+     * @param $aliases Alias names for doctype
+     * @return Reference to registered doctype (usable for further editing)
+     */
+    public function &register($doctype, $xml = true, $modules = array(),
+        $tidy_modules = array(), $aliases = array(), $dtd_public = null, $dtd_system = null
+    ) {
+        if (!is_array($modules)) $modules = array($modules);
+        if (!is_array($tidy_modules)) $tidy_modules = array($tidy_modules);
+        if (!is_array($aliases)) $aliases = array($aliases);
+        if (!is_object($doctype)) {
+            $doctype = new HTMLPurifier_Doctype(
+                $doctype, $xml, $modules, $tidy_modules, $aliases, $dtd_public, $dtd_system
+            );
+        }
+        $this->doctypes[$doctype->name] =& $doctype;
+        $name = $doctype->name;
+        // hookup aliases
+        foreach ($doctype->aliases as $alias) {
+            if (isset($this->doctypes[$alias])) continue;
+            $this->aliases[$alias] = $name;
+        }
+        // remove old aliases
+        if (isset($this->aliases[$name])) unset($this->aliases[$name]);
+        return $doctype;
+    }
+    
+    /**
+     * Retrieves reference to a doctype of a certain name
+     * @note This function resolves aliases
+     * @note When possible, use the more fully-featured make()
+     * @param $doctype Name of doctype
+     * @return Reference to doctype object
+     */
+    public function &get($doctype) {
+        if (isset($this->aliases[$doctype])) $doctype = $this->aliases[$doctype];
+        if (!isset($this->doctypes[$doctype])) {
+            trigger_error('Doctype ' . htmlspecialchars($doctype) . ' does not exist', E_USER_ERROR);
+            $anon = new HTMLPurifier_Doctype($doctype);
+            return $anon;
+        }
+        return $this->doctypes[$doctype];
+    }
+    
+    /**
+     * Creates a doctype based on a configuration object,
+     * will perform initialization on the doctype
+     * @note Use this function to get a copy of doctype that config
+     *       can hold on to (this is necessary in order to tell
+     *       Generator whether or not the current document is XML
+     *       based or not).
+     */
+    public function make($config) {
+        $original_doctype = $this->get($this->getDoctypeFromConfig($config));
+        $doctype = $original_doctype->copy();
+        return $doctype;
+    }
+    
+    /**
+     * Retrieves the doctype from the configuration object
+     */
+    public function getDoctypeFromConfig($config) {
+        // recommended test
+        $doctype = $config->get('HTML', 'Doctype');
+        if (!empty($doctype)) return $doctype;
+        $doctype = $config->get('HTML', 'CustomDoctype');
+        if (!empty($doctype)) return $doctype;
+        // backwards-compatibility
+        if ($config->get('HTML', 'XHTML')) {
+            $doctype = 'XHTML 1.0';
+        } else {
+            $doctype = 'HTML 4.01';
+        }
+        if ($config->get('HTML', 'Strict')) {
+            $doctype .= ' Strict';
+        } else {
+            $doctype .= ' Transitional';
+        }
+        return $doctype;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ElementDef.php

@@ -0,0 +1,175 @@
+<?php
+
+/**
+ * Structure that stores an HTML element definition. Used by
+ * HTMLPurifier_HTMLDefinition and HTMLPurifier_HTMLModule.
+ * @note This class is inspected by HTMLPurifier_Printer_HTMLDefinition.
+ *       Please update that class too.
+ */
+class HTMLPurifier_ElementDef
+{
+    
+    /**
+     * Does the definition work by itself, or is it created solely
+     * for the purpose of merging into another definition?
+     */
+    public $standalone = true;
+    
+    /**
+     * Associative array of attribute name to HTMLPurifier_AttrDef
+     * @note Before being processed by HTMLPurifier_AttrCollections
+     *       when modules are finalized during
+     *       HTMLPurifier_HTMLDefinition->setup(), this array may also
+     *       contain an array at index 0 that indicates which attribute
+     *       collections to load into the full array. It may also
+     *       contain string indentifiers in lieu of HTMLPurifier_AttrDef,
+     *       see HTMLPurifier_AttrTypes on how they are expanded during
+     *       HTMLPurifier_HTMLDefinition->setup() processing.
+     */
+    public $attr = array();
+    
+    /**
+     * Indexed list of tag's HTMLPurifier_AttrTransform to be done before validation
+     */
+    public $attr_transform_pre = array();
+    
+    /**
+     * Indexed list of tag's HTMLPurifier_AttrTransform to be done after validation
+     */
+    public $attr_transform_post = array();
+    
+    /**
+     * HTMLPurifier_ChildDef of this tag.
+     */
+    public $child;
+    
+    /**
+     * Abstract string representation of internal ChildDef rules. See
+     * HTMLPurifier_ContentSets for how this is parsed and then transformed
+     * into an HTMLPurifier_ChildDef.
+     * @warning This is a temporary variable that is not available after
+     *      being processed by HTMLDefinition
+     */
+    public $content_model;
+    
+    /**
+     * Value of $child->type, used to determine which ChildDef to use,
+     * used in combination with $content_model.
+     * @warning This must be lowercase
+     * @warning This is a temporary variable that is not available after
+     *      being processed by HTMLDefinition
+     */
+    public $content_model_type;
+    
+    
+    
+    /**
+     * Does the element have a content model (#PCDATA | Inline)*? This
+     * is important for chameleon ins and del processing in 
+     * HTMLPurifier_ChildDef_Chameleon. Dynamically set: modules don't
+     * have to worry about this one.
+     */
+    public $descendants_are_inline = false;
+    
+    /**
+     * List of the names of required attributes this element has. Dynamically
+     * populated by HTMLPurifier_HTMLDefinition::getElement
+     */
+    public $required_attr = array();
+    
+    /**
+     * Lookup table of tags excluded from all descendants of this tag.
+     * @note SGML permits exclusions for all descendants, but this is
+     *       not possible with DTDs or XML Schemas. W3C has elected to
+     *       use complicated compositions of content_models to simulate
+     *       exclusion for children, but we go the simpler, SGML-style
+     *       route of flat-out exclusions, which correctly apply to
+     *       all descendants and not just children. Note that the XHTML
+     *       Modularization Abstract Modules are blithely unaware of such
+     *       distinctions.
+     */
+    public $excludes = array();
+    
+    /**
+     * Is this element safe for untrusted users to use?
+     */
+    public $safe;
+    
+    /**
+     * Low-level factory constructor for creating new standalone element defs
+     */
+    public static function create($safe, $content_model, $content_model_type, $attr) {
+        $def = new HTMLPurifier_ElementDef();
+        $def->safe = (bool) $safe;
+        $def->content_model = $content_model;
+        $def->content_model_type = $content_model_type;
+        $def->attr = $attr;
+        return $def;
+    }
+    
+    /**
+     * Merges the values of another element definition into this one.
+     * Values from the new element def take precedence if a value is
+     * not mergeable.
+     */
+    public function mergeIn($def) {
+        
+        // later keys takes precedence
+        foreach($def->attr as $k => $v) {
+            if ($k === 0) {
+                // merge in the includes
+                // sorry, no way to override an include
+                foreach ($v as $v2) {
+                    $this->attr[0][] = $v2;
+                }
+                continue;
+            }
+            if ($v === false) {
+                if (isset($this->attr[$k])) unset($this->attr[$k]);
+                continue;
+            }
+            $this->attr[$k] = $v;
+        }
+        $this->_mergeAssocArray($this->attr_transform_pre, $def->attr_transform_pre);
+        $this->_mergeAssocArray($this->attr_transform_post, $def->attr_transform_post);
+        $this->_mergeAssocArray($this->excludes, $def->excludes);
+        
+        if(!empty($def->content_model)) {
+            $this->content_model .= ' | ' . $def->content_model;
+            $this->child = false;
+        }
+        if(!empty($def->content_model_type)) {
+            $this->content_model_type = $def->content_model_type;
+            $this->child = false;
+        }
+        if(!is_null($def->child)) $this->child = $def->child;
+        if($def->descendants_are_inline) $this->descendants_are_inline = $def->descendants_are_inline;
+        if(!is_null($def->safe)) $this->safe = $def->safe;
+        
+    }
+    
+    /**
+     * Merges one array into another, removes values which equal false
+     * @param $a1 Array by reference that is merged into
+     * @param $a2 Array that merges into $a1
+     */
+    private function _mergeAssocArray(&$a1, $a2) {
+        foreach ($a2 as $k => $v) {
+            if ($v === false) {
+                if (isset($a1[$k])) unset($a1[$k]);
+                continue;
+            }
+            $a1[$k] = $v;
+        }
+    }
+    
+    /**
+     * Retrieves a copy of the element definition
+     */
+    public function copy() {
+        return unserialize(serialize($this));
+    }
+    
+}
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Encoder.php

@@ -0,0 +1,395 @@
+<?php
+
+HTMLPurifier_ConfigSchema::define(
+    'Core', 'Encoding', 'utf-8', 'istring', 
+    'If for some reason you are unable to convert all webpages to UTF-8, '. 
+    'you can use this directive as a stop-gap compatibility change to '. 
+    'let HTML Purifier deal with non UTF-8 input.  This technique has '. 
+    'notable deficiencies: absolutely no characters outside of the selected '. 
+    'character encoding will be preserved, not even the ones that have '. 
+    'been ampersand escaped (this is due to a UTF-8 specific <em>feature</em> '.
+    'that automatically resolves all entities), making it pretty useless '.
+    'for anything except the most I18N-blind applications, although '.
+    '%Core.EscapeNonASCIICharacters offers fixes this trouble with '.
+    'another tradeoff. This directive '.
+    'only accepts ISO-8859-1 if iconv is not enabled.'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Core', 'EscapeNonASCIICharacters', false, 'bool',
+    'This directive overcomes a deficiency in %Core.Encoding by blindly '.
+    'converting all non-ASCII characters into decimal numeric entities before '.
+    'converting it to its native encoding. This means that even '.
+    'characters that can be expressed in the non-UTF-8 encoding will '.
+    'be entity-ized, which can be a real downer for encodings like Big5. '.
+    'It also assumes that the ASCII repetoire is available, although '.
+    'this is the case for almost all encodings. Anyway, use UTF-8! This '.
+    'directive has been available since 1.4.0.'
+);
+
+if ( !function_exists('iconv') ) {
+    // only encodings with native PHP support
+    HTMLPurifier_ConfigSchema::defineAllowedValues(
+        'Core', 'Encoding', array(
+            'utf-8',
+            'iso-8859-1'
+        )
+    );
+    HTMLPurifier_ConfigSchema::defineValueAliases(
+        'Core', 'Encoding', array(
+            'iso8859-1' => 'iso-8859-1'
+        )
+    );
+}
+
+HTMLPurifier_ConfigSchema::define(
+    'Test', 'ForceNoIconv', false, 'bool', 
+    'When set to true, HTMLPurifier_Encoder will act as if iconv does not '.
+    'exist and use only pure PHP implementations.'
+);
+
+/**
+ * A UTF-8 specific character encoder that handles cleaning and transforming.
+ * @note All functions in this class should be static.
+ */
+class HTMLPurifier_Encoder
+{
+    
+    /**
+     * Constructor throws fatal error if you attempt to instantiate class
+     */
+    private function __construct() {
+        trigger_error('Cannot instantiate encoder, call methods statically', E_USER_ERROR);
+    }
+    
+    /**
+     * Cleans a UTF-8 string for well-formedness and SGML validity
+     * 
+     * It will parse according to UTF-8 and return a valid UTF8 string, with
+     * non-SGML codepoints excluded.
+     * 
+     * @note Just for reference, the non-SGML code points are 0 to 31 and
+     *       127 to 159, inclusive.  However, we allow code points 9, 10
+     *       and 13, which are the tab, line feed and carriage return
+     *       respectively. 128 and above the code points map to multibyte
+     *       UTF-8 representations.
+     * 
+     * @note Fallback code adapted from utf8ToUnicode by Henri Sivonen and
+     *       hsivonen@iki.fi at <http://iki.fi/hsivonen/php-utf8/> under the
+     *       LGPL license.  Notes on what changed are inside, but in general,
+     *       the original code transformed UTF-8 text into an array of integer
+     *       Unicode codepoints. Understandably, transforming that back to
+     *       a string would be somewhat expensive, so the function was modded to
+     *       directly operate on the string.  However, this discourages code
+     *       reuse, and the logic enumerated here would be useful for any
+     *       function that needs to be able to understand UTF-8 characters.
+     *       As of right now, only smart lossless character encoding converters
+     *       would need that, and I'm probably not going to implement them.
+     *       Once again, PHP 6 should solve all our problems.
+     */
+    public static function cleanUTF8($str, $force_php = false) {
+        
+        static $non_sgml_chars = array();
+        if (empty($non_sgml_chars)) {
+            for ($i = 0; $i <= 31; $i++) {
+                // non-SGML ASCII chars
+                // save \r, \t and \n
+                if ($i == 9 || $i == 13 || $i == 10) continue;
+                $non_sgml_chars[chr($i)] = '';
+            }
+            for ($i = 127; $i <= 159; $i++) {
+                $non_sgml_chars[HTMLPurifier_Encoder::unichr($i)] = '';
+            }
+        }
+        
+        static $iconv = null;
+        if ($iconv === null) $iconv = function_exists('iconv');
+        
+        if ($iconv && !$force_php) {
+            // do the shortcut way
+            $str = @iconv('UTF-8', 'UTF-8//IGNORE', $str);
+            return strtr($str, $non_sgml_chars);
+        }
+        
+        $mState = 0; // cached expected number of octets after the current octet
+                     // until the beginning of the next UTF8 character sequence
+        $mUcs4  = 0; // cached Unicode character
+        $mBytes = 1; // cached expected number of octets in the current sequence
+        
+        // original code involved an $out that was an array of Unicode
+        // codepoints.  Instead of having to convert back into UTF-8, we've
+        // decided to directly append valid UTF-8 characters onto a string
+        // $out once they're done.  $char accumulates raw bytes, while $mUcs4
+        // turns into the Unicode code point, so there's some redundancy.
+        
+        $out = '';
+        $char = '';
+        
+        $len = strlen($str);
+        for($i = 0; $i < $len; $i++) {
+            $in = ord($str{$i});
+            $char .= $str[$i]; // append byte to char
+            if (0 == $mState) {
+                // When mState is zero we expect either a US-ASCII character 
+                // or a multi-octet sequence.
+                if (0 == (0x80 & ($in))) {
+                    // US-ASCII, pass straight through.
+                    if (($in <= 31 || $in == 127) && 
+                        !($in == 9 || $in == 13 || $in == 10) // save \r\t\n
+                    ) {
+                        // control characters, remove
+                    } else {
+                        $out .= $char;
+                    }
+                    // reset
+                    $char = '';
+                    $mBytes = 1;
+                } elseif (0xC0 == (0xE0 & ($in))) {
+                    // First octet of 2 octet sequence
+                    $mUcs4 = ($in);
+                    $mUcs4 = ($mUcs4 & 0x1F) << 6;
+                    $mState = 1;
+                    $mBytes = 2;
+                } elseif (0xE0 == (0xF0 & ($in))) {
+                    // First octet of 3 octet sequence
+                    $mUcs4 = ($in);
+                    $mUcs4 = ($mUcs4 & 0x0F) << 12;
+                    $mState = 2;
+                    $mBytes = 3;
+                } elseif (0xF0 == (0xF8 & ($in))) {
+                    // First octet of 4 octet sequence
+                    $mUcs4 = ($in);
+                    $mUcs4 = ($mUcs4 & 0x07) << 18;
+                    $mState = 3;
+                    $mBytes = 4;
+                } elseif (0xF8 == (0xFC & ($in))) {
+                    // First octet of 5 octet sequence.
+                    // 
+                    // This is illegal because the encoded codepoint must be 
+                    // either:
+                    // (a) not the shortest form or
+                    // (b) outside the Unicode range of 0-0x10FFFF.
+                    // Rather than trying to resynchronize, we will carry on 
+                    // until the end of the sequence and let the later error
+                    // handling code catch it.
+                    $mUcs4 = ($in);
+                    $mUcs4 = ($mUcs4 & 0x03) << 24;
+                    $mState = 4;
+                    $mBytes = 5;
+                } elseif (0xFC == (0xFE & ($in))) {
+                    // First octet of 6 octet sequence, see comments for 5
+                    // octet sequence.
+                    $mUcs4 = ($in);
+                    $mUcs4 = ($mUcs4 & 1) << 30;
+                    $mState = 5;
+                    $mBytes = 6;
+                } else {
+                    // Current octet is neither in the US-ASCII range nor a 
+                    // legal first octet of a multi-octet sequence.
+                    $mState = 0;
+                    $mUcs4  = 0;
+                    $mBytes = 1;
+                    $char = '';
+                }
+            } else {
+                // When mState is non-zero, we expect a continuation of the
+                // multi-octet sequence
+                if (0x80 == (0xC0 & ($in))) {
+                    // Legal continuation.
+                    $shift = ($mState - 1) * 6;
+                    $tmp = $in;
+                    $tmp = ($tmp & 0x0000003F) << $shift;
+                    $mUcs4 |= $tmp;
+                    
+                    if (0 == --$mState) {
+                        // End of the multi-octet sequence. mUcs4 now contains
+                        // the final Unicode codepoint to be output
+                        
+                        // Check for illegal sequences and codepoints.
+                        
+                        // From Unicode 3.1, non-shortest form is illegal
+                        if (((2 == $mBytes) && ($mUcs4 < 0x0080)) ||
+                            ((3 == $mBytes) && ($mUcs4 < 0x0800)) ||
+                            ((4 == $mBytes) && ($mUcs4 < 0x10000)) ||
+                            (4 < $mBytes) ||
+                            // From Unicode 3.2, surrogate characters = illegal
+                            (($mUcs4 & 0xFFFFF800) == 0xD800) ||
+                            // Codepoints outside the Unicode range are illegal
+                            ($mUcs4 > 0x10FFFF)
+                        ) {
+                            
+                        } elseif (0xFEFF != $mUcs4 && // omit BOM
+                            !($mUcs4 >= 128 && $mUcs4 <= 159) // omit non-SGML
+                        ) {
+                            $out .= $char;
+                        }
+                        // initialize UTF8 cache (reset)
+                        $mState = 0;
+                        $mUcs4  = 0;
+                        $mBytes = 1;
+                        $char = '';
+                    }
+                } else {
+                    // ((0xC0 & (*in) != 0x80) && (mState != 0))
+                    // Incomplete multi-octet sequence.
+                    // used to result in complete fail, but we'll reset
+                    $mState = 0;
+                    $mUcs4  = 0;
+                    $mBytes = 1;
+                    $char ='';
+                }
+            }
+        }
+        return $out;
+    }
+    
+    /**
+     * Translates a Unicode codepoint into its corresponding UTF-8 character.
+     * @note Based on Feyd's function at
+     *       <http://forums.devnetwork.net/viewtopic.php?p=191404#191404>,
+     *       which is in public domain.
+     * @note While we're going to do code point parsing anyway, a good
+     *       optimization would be to refuse to translate code points that
+     *       are non-SGML characters.  However, this could lead to duplication.
+     * @note This is very similar to the unichr function in
+     *       maintenance/generate-entity-file.php (although this is superior,
+     *       due to its sanity checks).
+     */
+    
+    // +----------+----------+----------+----------+
+    // | 33222222 | 22221111 | 111111   |          |
+    // | 10987654 | 32109876 | 54321098 | 76543210 | bit
+    // +----------+----------+----------+----------+
+    // |          |          |          | 0xxxxxxx | 1 byte 0x00000000..0x0000007F
+    // |          |          | 110yyyyy | 10xxxxxx | 2 byte 0x00000080..0x000007FF
+    // |          | 1110zzzz | 10yyyyyy | 10xxxxxx | 3 byte 0x00000800..0x0000FFFF
+    // | 11110www | 10wwzzzz | 10yyyyyy | 10xxxxxx | 4 byte 0x00010000..0x0010FFFF
+    // +----------+----------+----------+----------+
+    // | 00000000 | 00011111 | 11111111 | 11111111 | Theoretical upper limit of legal scalars: 2097151 (0x001FFFFF)
+    // | 00000000 | 00010000 | 11111111 | 11111111 | Defined upper limit of legal scalar codes
+    // +----------+----------+----------+----------+ 
+    
+    public static function unichr($code) {
+        if($code > 1114111 or $code < 0 or
+          ($code >= 55296 and $code <= 57343) ) {
+            // bits are set outside the "valid" range as defined
+            // by UNICODE 4.1.0 
+            return '';
+        }
+        
+        $x = $y = $z = $w = 0; 
+        if ($code < 128) {
+            // regular ASCII character
+            $x = $code;
+        } else {
+            // set up bits for UTF-8
+            $x = ($code & 63) | 128;
+            if ($code < 2048) {
+                $y = (($code & 2047) >> 6) | 192;
+            } else {
+                $y = (($code & 4032) >> 6) | 128;
+                if($code < 65536) {
+                    $z = (($code >> 12) & 15) | 224;
+                } else {
+                    $z = (($code >> 12) & 63) | 128;
+                    $w = (($code >> 18) & 7)  | 240;
+                }
+            } 
+        }
+        // set up the actual character
+        $ret = '';
+        if($w) $ret .= chr($w);
+        if($z) $ret .= chr($z);
+        if($y) $ret .= chr($y);
+        $ret .= chr($x); 
+        
+        return $ret;
+    }
+    
+    /**
+     * Converts a string to UTF-8 based on configuration.
+     */
+    public static function convertToUTF8($str, $config, $context) {
+        static $iconv = null;
+        if ($iconv === null) $iconv = function_exists('iconv');
+        $encoding = $config->get('Core', 'Encoding');
+        if ($encoding === 'utf-8') return $str;
+        if ($iconv && !$config->get('Test', 'ForceNoIconv')) {
+            return @iconv($encoding, 'utf-8//IGNORE', $str);
+        } elseif ($encoding === 'iso-8859-1') {
+            return @utf8_encode($str);
+        }
+        trigger_error('Encoding not supported', E_USER_ERROR);
+    }
+    
+    /**
+     * Converts a string from UTF-8 based on configuration.
+     * @note Currently, this is a lossy conversion, with unexpressable
+     *       characters being omitted.
+     */
+    public static function convertFromUTF8($str, $config, $context) {
+        static $iconv = null;
+        if ($iconv === null) $iconv = function_exists('iconv');
+        $encoding = $config->get('Core', 'Encoding');
+        if ($encoding === 'utf-8') return $str;
+        if ($config->get('Core', 'EscapeNonASCIICharacters')) {
+            $str = HTMLPurifier_Encoder::convertToASCIIDumbLossless($str);
+        }
+        if ($iconv && !$config->get('Test', 'ForceNoIconv')) {
+            return @iconv('utf-8', $encoding . '//IGNORE', $str);
+        } elseif ($encoding === 'iso-8859-1') {
+            return @utf8_decode($str);
+        }
+        trigger_error('Encoding not supported', E_USER_ERROR);
+    }
+    
+    /**
+     * Lossless (character-wise) conversion of HTML to ASCII
+     * @param $str UTF-8 string to be converted to ASCII
+     * @returns ASCII encoded string with non-ASCII character entity-ized
+     * @warning Adapted from MediaWiki, claiming fair use: this is a common
+     *       algorithm. If you disagree with this license fudgery,
+     *       implement it yourself.
+     * @note Uses decimal numeric entities since they are best supported.
+     * @note This is a DUMB function: it has no concept of keeping
+     *       character entities that the projected character encoding
+     *       can allow. We could possibly implement a smart version
+     *       but that would require it to also know which Unicode
+     *       codepoints the charset supported (not an easy task).
+     * @note Sort of with cleanUTF8() but it assumes that $str is
+     *       well-formed UTF-8
+     */
+    public static function convertToASCIIDumbLossless($str) {
+        $bytesleft = 0;
+        $result = '';
+        $working = 0;
+        $len = strlen($str);
+        for( $i = 0; $i < $len; $i++ ) {
+            $bytevalue = ord( $str[$i] );
+            if( $bytevalue <= 0x7F ) { //0xxx xxxx
+                $result .= chr( $bytevalue );
+                $bytesleft = 0;
+            } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
+                $working = $working << 6;
+                $working += ($bytevalue & 0x3F);
+                $bytesleft--;
+                if( $bytesleft <= 0 ) {
+                    $result .= "&#" . $working . ";";
+                }
+            } elseif( $bytevalue <= 0xDF ) { //110x xxxx
+                $working = $bytevalue & 0x1F;
+                $bytesleft = 1;
+            } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
+                $working = $bytevalue & 0x0F;
+                $bytesleft = 2;
+            } else { //1111 0xxx
+                $working = $bytevalue & 0x07;
+                $bytesleft = 3;
+            }
+        }
+        return $result;
+    }
+    
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/EntityLookup.php

@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Object that provides entity lookup table from entity name to character
+ */
+class HTMLPurifier_EntityLookup {
+    
+    /**
+     * Assoc array of entity name to character represented.
+     */
+    public $table;
+    
+    /**
+     * Sets up the entity lookup table from the serialized file contents.
+     * @note The serialized contents are versioned, but were generated
+     *       using the maintenance script generate_entity_file.php
+     * @warning This is not in constructor to help enforce the Singleton
+     */
+    public function setup($file = false) {
+        if (!$file) {
+            $file = HTMLPURIFIER_PREFIX . '/HTMLPurifier/EntityLookup/entities.ser';
+        }
+        $this->table = unserialize(file_get_contents($file));
+    }
+    
+    /**
+     * Retrieves sole instance of the object.
+     * @param Optional prototype of custom lookup table to overload with.
+     */
+    public static function instance($prototype = false) {
+        // no references, since PHP doesn't copy unless modified
+        static $instance = null;
+        if ($prototype) {
+            $instance = $prototype;
+        } elseif (!$instance) {
+            $instance = new HTMLPurifier_EntityLookup();
+            $instance->setup();
+        }
+        return $instance;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/EntityParser.php

@@ -0,0 +1,146 @@
+<?php
+
+require_once 'HTMLPurifier/EntityLookup.php';
+require_once 'HTMLPurifier/Encoder.php';
+
+// if want to implement error collecting here, we'll need to use some sort
+// of global data (probably trigger_error) because it's impossible to pass
+// $config or $context to the callback functions.
+
+/**
+ * Handles referencing and derefencing character entities
+ */
+class HTMLPurifier_EntityParser
+{
+    
+    /**
+     * Reference to entity lookup table.
+     */
+    protected $_entity_lookup;
+    
+    /**
+     * Callback regex string for parsing entities.
+     */                             
+    protected $_substituteEntitiesRegex =
+'/&(?:[#]x([a-fA-F0-9]+)|[#]0*(\d+)|([A-Za-z_:][A-Za-z0-9.\-_:]*));?/';
+//     1. hex             2. dec      3. string (XML style)
+    
+    
+    /**
+     * Decimal to parsed string conversion table for special entities.
+     */
+    protected $_special_dec2str =
+            array(
+                    34 => '"',
+                    38 => '&',
+                    39 => "'",
+                    60 => '<',
+                    62 => '>'
+            );
+    
+    /**
+     * Stripped entity names to decimal conversion table for special entities.
+     */
+    protected $_special_ent2dec =
+            array(
+                    'quot' => 34,
+                    'amp'  => 38,
+                    'lt'   => 60,
+                    'gt'   => 62
+            );
+    
+    /**
+     * Substitutes non-special entities with their parsed equivalents. Since
+     * running this whenever you have parsed character is t3h 5uck, we run
+     * it before everything else.
+     * 
+     * @param $string String to have non-special entities parsed.
+     * @returns Parsed string.
+     */
+    public function substituteNonSpecialEntities($string) {
+        // it will try to detect missing semicolons, but don't rely on it
+        return preg_replace_callback(
+            $this->_substituteEntitiesRegex,
+            array($this, 'nonSpecialEntityCallback'),
+            $string
+            );
+    }
+    
+    /**
+     * Callback function for substituteNonSpecialEntities() that does the work.
+     * 
+     * @param $matches  PCRE matches array, with 0 the entire match, and
+     *                  either index 1, 2 or 3 set with a hex value, dec value,
+     *                  or string (respectively).
+     * @returns Replacement string.
+     */
+    
+    protected function nonSpecialEntityCallback($matches) {
+        // replaces all but big five
+        $entity = $matches[0];
+        $is_num = (@$matches[0][1] === '#');
+        if ($is_num) {
+            $is_hex = (@$entity[2] === 'x');
+            $code = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
+            
+            // abort for special characters
+            if (isset($this->_special_dec2str[$code]))  return $entity;
+            
+            return HTMLPurifier_Encoder::unichr($code);
+        } else {
+            if (isset($this->_special_ent2dec[$matches[3]])) return $entity;
+            if (!$this->_entity_lookup) {
+                $this->_entity_lookup = HTMLPurifier_EntityLookup::instance();
+            }
+            if (isset($this->_entity_lookup->table[$matches[3]])) {
+                return $this->_entity_lookup->table[$matches[3]];
+            } else {
+                return $entity;
+            }
+        }
+    }
+    
+    /**
+     * Substitutes only special entities with their parsed equivalents.
+     * 
+     * @notice We try to avoid calling this function because otherwise, it
+     * would have to be called a lot (for every parsed section).
+     * 
+     * @param $string String to have non-special entities parsed.
+     * @returns Parsed string.
+     */
+    public function substituteSpecialEntities($string) {
+        return preg_replace_callback(
+            $this->_substituteEntitiesRegex,
+            array($this, 'specialEntityCallback'),
+            $string);
+    }
+    
+    /**
+     * Callback function for substituteSpecialEntities() that does the work.
+     * 
+     * This callback has same syntax as nonSpecialEntityCallback().
+     * 
+     * @param $matches  PCRE-style matches array, with 0 the entire match, and
+     *                  either index 1, 2 or 3 set with a hex value, dec value,
+     *                  or string (respectively).
+     * @returns Replacement string.
+     */
+    protected function specialEntityCallback($matches) {
+        $entity = $matches[0];
+        $is_num = (@$matches[0][1] === '#');
+        if ($is_num) {
+            $is_hex = (@$entity[2] === 'x');
+            $int = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
+            return isset($this->_special_dec2str[$int]) ?
+                $this->_special_dec2str[$int] :
+                $entity;
+        } else {
+            return isset($this->_special_ent2dec[$matches[3]]) ?
+                $this->_special_ent2dec[$matches[3]] :
+                $entity;
+        }
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Error.php

@@ -0,0 +1,7 @@
+<?php
+
+/**
+ * Return object from functions that signifies error when null doesn't cut it
+ */
+class HTMLPurifier_Error {}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/ErrorCollector.php

@@ -0,0 +1,118 @@
+<?php
+
+require_once 'HTMLPurifier/Generator.php';
+
+/**
+ * Error collection class that enables HTML Purifier to report HTML
+ * problems back to the user
+ */
+class HTMLPurifier_ErrorCollector
+{
+    
+    protected $errors = array();
+    protected $locale;
+    protected $generator;
+    protected $context;
+    
+    public function __construct($context) {
+        $this->locale    =& $context->get('Locale');
+        $this->generator =& $context->get('Generator');
+        $this->context   =& $context;
+    }
+    
+    /**
+     * Sends an error message to the collector for later use
+     * @param $line Integer line number, or HTMLPurifier_Token that caused error
+     * @param $severity int Error severity, PHP error style (don't use E_USER_)
+     * @param $msg string Error message text
+     */
+    public function send($severity, $msg) {
+        
+        $args = array();
+        if (func_num_args() > 2) {
+            $args = func_get_args();
+            array_shift($args);
+            unset($args[0]);
+        }
+        
+        $token = $this->context->get('CurrentToken', true);
+        $line  = $token ? $token->line : $this->context->get('CurrentLine', true);
+        $attr  = $this->context->get('CurrentAttr', true);
+        
+        // perform special substitutions, also add custom parameters
+        $subst = array();
+        if (!is_null($token)) {
+            $args['CurrentToken'] = $token;
+        }
+        if (!is_null($attr)) {
+            $subst['$CurrentAttr.Name'] = $attr;
+            if (isset($token->attr[$attr])) $subst['$CurrentAttr.Value'] = $token->attr[$attr];
+        }
+        
+        if (empty($args)) {
+            $msg = $this->locale->getMessage($msg);
+        } else {
+            $msg = $this->locale->formatMessage($msg, $args);
+        }
+        
+        if (!empty($subst)) $msg = strtr($msg, $subst);
+        
+        $this->errors[] = array($line, $severity, $msg);
+    }
+    
+    /**
+     * Retrieves raw error data for custom formatter to use
+     * @param List of arrays in format of array(Error message text,
+     *        token that caused error, tokens surrounding token)
+     */
+    public function getRaw() {
+        return $this->errors;
+    }
+    
+    /**
+     * Default HTML formatting implementation for error messages
+     * @param $config Configuration array, vital for HTML output nature
+     */
+    public function getHTMLFormatted($config) {
+        $ret = array();
+        
+        $errors = $this->errors;
+        
+        // sort error array by line
+        // line numbers are enabled if they aren't explicitly disabled
+        if ($config->get('Core', 'MaintainLineNumbers') !== false) {
+            $has_line       = array();
+            $lines          = array();
+            $original_order = array();
+            foreach ($errors as $i => $error) {
+                $has_line[] = (int) (bool) $error[0];
+                $lines[] = $error[0];
+                $original_order[] = $i;
+            }
+            array_multisort($has_line, SORT_DESC, $lines, SORT_ASC, $original_order, SORT_ASC, $errors);
+        }
+        
+        foreach ($errors as $error) {
+            list($line, $severity, $msg) = $error;
+            $string = '';
+            $string .= '<strong>' . $this->locale->getErrorName($severity) . '</strong>: ';
+            $string .= $this->generator->escape($msg); 
+            if ($line) {
+                // have javascript link generation that causes 
+                // textarea to skip to the specified line
+                $string .= $this->locale->formatMessage(
+                    'ErrorCollector: At line', array('line' => $line));
+            }
+            $ret[] = $string;
+        }
+        
+        if (empty($errors)) {
+            return '<p>' . $this->locale->getMessage('ErrorCollector: No errors') . '</p>';
+        } else {
+            return '<ul><li>' . implode('</li><li>', $ret) . '</li></ul>';
+        }
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Filter.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Represents a pre or post processing filter on HTML Purifier's output
+ * 
+ * Sometimes, a little ad-hoc fixing of HTML has to be done before
+ * it gets sent through HTML Purifier: you can use filters to acheive
+ * this effect. For instance, YouTube videos can be preserved using
+ * this manner. You could have used a decorator for this task, but
+ * PHP's support for them is not terribly robust, so we're going
+ * to just loop through the filters.
+ * 
+ * Filters should be exited first in, last out. If there are three filters,
+ * named 1, 2 and 3, the order of execution should go 1->preFilter,
+ * 2->preFilter, 3->preFilter, purify, 3->postFilter, 2->postFilter,
+ * 1->postFilter.
+ * 
+ * @note Methods are not declared abstract as it is perfectly legitimate
+ *       for an implementation not to want anything to happen on a step
+ */
+
+class HTMLPurifier_Filter
+{
+    
+    /**
+     * Name of the filter for identification purposes
+     */
+    public $name;
+    
+    /**
+     * Pre-processor function, handles HTML before HTML Purifier 
+     */
+    public function preFilter($html, $config, $context) {
+        return $html;
+    }
+    
+    /**
+     * Post-processor function, handles HTML after HTML Purifier
+     */
+    public function postFilter($html, $config, $context) {
+        return $html;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Filter/ExtractStyleBlocks.php

@@ -0,0 +1,172 @@
+<?php
+
+require_once 'HTMLPurifier/Filter.php';
+
+HTMLPurifier_ConfigSchema::define(
+    'Filter', 'ExtractStyleBlocksEscaping', true, 'bool', '
+<p>
+  Whether or not to escape the dangerous characters &lt;, &gt; and &amp;
+  as \3C, \3E and \26, respectively. This is can be safely set to false
+  if the contents of StyleBlocks will be placed in an external stylesheet,
+  where there is no risk of it being interpreted as HTML. This directive
+  has been available since 3.0.0.
+</p>
+'
+);
+
+HTMLPurifier_ConfigSchema::define(
+    'Filter', 'ExtractStyleBlocksScope', null, 'string/null', '
+<p>
+  If you would like users to be able to define external stylesheets, but
+  only allow them to specify CSS declarations for a specific node and
+  prevent them from fiddling with other elements, use this directive.
+  It accepts any valid CSS selector, and will prepend this to any
+  CSS declaration extracted from the document. For example, if this
+  directive is set to <code>#user-content</code> and a user uses the
+  selector <code>a:hover</code>, the final selector will be
+  <code>#user-content a:hover</code>.
+</p>
+<p>
+  The comma shorthand may be used; consider the above example, with
+  <code>#user-content, #user-content2</code>, the final selector will
+  be <code>#user-content a:hover, #user-content2 a:hover</code>.
+</p>
+<p>
+  <strong>Warning:</strong> It is possible for users to bypass this measure
+  using a naughty + selector. This is a bug in CSS Tidy 1.3, not HTML
+  Purifier, and I am working to get it fixed. Until then, HTML Purifier
+  performs a basic check to prevent this.
+</p>
+<p>
+  This directive has been available since 3.0.0.
+</p>
+'
+);
+
+/**
+ * This filter extracts <style> blocks from input HTML, cleans them up
+ * using CSSTidy, and then places them in $purifier->context->get('StyleBlocks')
+ * so they can be used elsewhere in the document.
+ * 
+ * @note
+ *      See tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php for
+ *      sample usage.
+ * 
+ * @note
+ *      This filter can also be used on stylesheets not included in the
+ *      document--something purists would probably prefer. Just directly
+ *      call HTMLPurifier_Filter_ExtractStyleBlocks->cleanCSS()
+ */
+class HTMLPurifier_Filter_ExtractStyleBlocks extends HTMLPurifier_Filter
+{
+    
+    public $name = 'ExtractStyleBlocks';
+    private $_styleMatches = array();
+    private $_tidy;
+    
+    /**
+     * @param $tidy
+     *      Instance of csstidy to use, false to turn off cleaning,
+     *      and null to automatically instantiate
+     */
+    public function __construct($tidy = null) {
+        if ($tidy === null) $tidy = new csstidy();
+        $this->_tidy = $tidy;
+    }
+    
+    /**
+     * Save the contents of CSS blocks to style matches
+     * @param $matches preg_replace style $matches array
+     */
+    protected function styleCallback($matches) {
+        $this->_styleMatches[] = $matches[1];
+    }
+    
+    /**
+     * Removes inline <style> tags from HTML, saves them for later use
+     * @todo Extend to indicate non-text/css style blocks
+     */
+    public function preFilter($html, $config, $context) {
+        $html = preg_replace_callback('#<style(?:\s.*)?>(.+)</style>#isU', array($this, 'styleCallback'), $html);
+        $style_blocks = $this->_styleMatches;
+        $this->_styleMatches = array(); // reset
+        $context->register('StyleBlocks', $style_blocks); // $context must not be reused
+        if ($this->_tidy) {
+            foreach ($style_blocks as &$style) {
+                $style = $this->cleanCSS($style, $config, $context);
+            }
+        }
+        return $html;
+    }
+    
+    /**
+     * Takes CSS (the stuff found in <style>) and cleans it.
+     * @warning Requires CSSTidy <http://csstidy.sourceforge.net/>
+     * @param $css     CSS styling to clean
+     * @param $config  Instance of HTMLPurifier_Config
+     * @param $context Instance of HTMLPurifier_Context
+     * @return Cleaned CSS
+     */
+    public function cleanCSS($css, $config, $context) {
+        // prepare scope
+        $scope = $config->get('Filter', 'ExtractStyleBlocksScope');
+        if ($scope !== null) {
+            $scopes = array_map('trim', explode(',', $scope));
+        } else {
+            $scopes = array();
+        }
+        $this->_tidy->parse($css);
+        $css_definition = $config->getDefinition('CSS');
+        foreach ($this->_tidy->css as $k => $decls) {
+            // $decls are all CSS declarations inside an @ selector
+            $new_decls = array();
+            foreach ($decls as $selector => $style) {
+                $selector = trim($selector);
+                if ($selector === '') continue; // should not happen
+                if ($selector[0] === '+') {
+                    if ($selector !== '' && $selector[0] === '+') continue;
+                }
+                if (!empty($scopes)) {
+                    $new_selector = array(); // because multiple ones are possible
+                    $selectors = array_map('trim', explode(',', $selector));
+                    foreach ($scopes as $s1) {
+                        foreach ($selectors as $s2) {
+                            $new_selector[] = "$s1 $s2";
+                        }
+                    }
+                    $selector = implode(', ', $new_selector); // now it's a string
+                }
+                foreach ($style as $name => $value) {
+                    if (!isset($css_definition->info[$name])) {
+                        unset($style[$name]);
+                        continue;
+                    }
+                    $def = $css_definition->info[$name];
+                    $ret = $def->validate($value, $config, $context);
+                    if ($ret === false) unset($style[$name]);
+                    else $style[$name] = $ret;
+                }
+                $new_decls[$selector] = $style;
+            }
+            $this->_tidy->css[$k] = $new_decls;
+        }
+        // remove stuff that shouldn't be used, could be reenabled
+        // after security risks are analyzed
+        $this->_tidy->import = array();
+        $this->_tidy->charset = null;
+        $this->_tidy->namespace = null;
+        $css = $this->_tidy->print->plain();
+        // we are going to escape any special characters <>& to ensure
+        // that no funny business occurs (i.e. </style> in a font-family prop).
+        if ($config->get('Filter', 'ExtractStyleBlocksEscaping')) {
+            $css = str_replace(
+                array('<',    '>',    '&'),
+                array('\3C ', '\3E ', '\26 '),
+                $css
+            );
+        }
+        return $css;
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Filter/YouTube.php

@@ -0,0 +1,33 @@
+<?php
+
+require_once 'HTMLPurifier/Filter.php';
+
+class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
+{
+    
+    public $name = 'YouTube';
+    
+    public function preFilter($html, $config, $context) {
+        $pre_regex = '#<object[^>]+>.+?'.
+            'http://www.youtube.com/v/([A-Za-z0-9\-_]+).+?</object>#s';
+        $pre_replace = '<span class="youtube-embed">\1</span>';
+        return preg_replace($pre_regex, $pre_replace, $html);
+    }
+    
+    public function postFilter($html, $config, $context) {
+        $post_regex = '#<span class="youtube-embed">([A-Za-z0-9\-_]+)</span>#';
+        $post_replace = '<object width="425" height="350" '.
+            'data="http://www.youtube.com/v/\1">'.
+            '<param name="movie" value="http://www.youtube.com/v/\1"></param>'.
+            '<param name="wmode" value="transparent"></param>'.
+            '<!--[if IE]>'.
+            '<embed src="http://www.youtube.com/v/\1"'.
+            'type="application/x-shockwave-flash"'.
+            'wmode="transparent" width="425" height="350" />'.
+            '<![endif]-->'.
+            '</object>';
+        return preg_replace($post_regex, $post_replace, $html);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/Generator.php

@@ -0,0 +1,210 @@
+<?php
+
+HTMLPurifier_ConfigSchema::define(
+    'Output', 'CommentScriptContents', true, 'bool',
+    'Determines whether or not HTML Purifier should attempt to fix up '.
+    'the contents of script tags for legacy browsers with comments. This '.
+    'directive was available since 2.0.0.'
+);
+HTMLPurifier_ConfigSchema::defineAlias('Core', 'CommentScriptContents', 'Output', 'CommentScriptContents');
+
+// extension constraints could be factored into ConfigSchema
+HTMLPurifier_ConfigSchema::define(
+    'Output', 'TidyFormat', false, 'bool', <<<HTML
+<p>
+    Determines whether or not to run Tidy on the final output for pretty 
+    formatting reasons, such as indentation and wrap.
+</p>
+<p>
+    This can greatly improve readability for editors who are hand-editing
+    the HTML, but is by no means necessary as HTML Purifier has already
+    fixed all major errors the HTML may have had. Tidy is a non-default
+    extension, and this directive will silently fail if Tidy is not
+    available.
+</p>
+<p>
+    If you are looking to make the overall look of your page's source
+    better, I recommend running Tidy on the entire page rather than just
+    user-content (after all, the indentation relative to the containing
+    blocks will be incorrect).
+</p>
+<p>
+    This directive was available since 1.1.1.
+</p>
+HTML
+);
+HTMLPurifier_ConfigSchema::defineAlias('Core', 'TidyFormat', 'Output', 'TidyFormat');
+
+HTMLPurifier_ConfigSchema::define('Output', 'Newline', null, 'string/null', '
+<p>
+    Newline string to format final output with. If left null, HTML Purifier
+    will auto-detect the default newline type of the system and use that;
+    you can manually override it here. Remember, \r\n is Windows, \r
+    is Mac, and \n is Unix. This directive was available since 2.0.1.
+</p>
+');
+
+/**
+ * Generates HTML from tokens.
+ * @todo Refactor interface so that configuration/context is determined
+ *       upon instantiation, no need for messy generateFromTokens() calls
+ * @todo Make some of the more internal functions protected, and have
+ *       unit tests work around that
+ */
+class HTMLPurifier_Generator
+{
+    
+    /**
+     * Bool cache of %HTML.XHTML
+     * @private
+     */
+    private $_xhtml = true;
+    
+    /**
+     * Bool cache of %Output.CommentScriptContents
+     * @private
+     */
+    private $_scriptFix = false;
+    
+    /**
+     * Cache of HTMLDefinition
+     * @private
+     */
+    private $_def;
+    
+    /**
+     * Generates HTML from an array of tokens.
+     * @param $tokens Array of HTMLPurifier_Token
+     * @param $config HTMLPurifier_Config object
+     * @return Generated HTML
+     */
+    public function generateFromTokens($tokens, $config, $context) {
+        $html = '';
+        if (!$config) $config = HTMLPurifier_Config::createDefault();
+        $this->_scriptFix   = $config->get('Output', 'CommentScriptContents');
+        
+        $this->_def = $config->getHTMLDefinition();
+        $this->_xhtml = $this->_def->doctype->xml;
+        
+        if (!$tokens) return '';
+        for ($i = 0, $size = count($tokens); $i < $size; $i++) {
+            if ($this->_scriptFix && $tokens[$i]->name === 'script'
+                && $i + 2 < $size && $tokens[$i+2]->type == 'end') {
+                // script special case
+                // the contents of the script block must be ONE token
+                // for this to work
+                $html .= $this->generateFromToken($tokens[$i++]);
+                $html .= $this->generateScriptFromToken($tokens[$i++]);
+                // We're not going to do this: it wouldn't be valid anyway
+                //while ($tokens[$i]->name != 'script') {
+                //    $html .= $this->generateScriptFromToken($tokens[$i++]);
+                //}
+            }
+            $html .= $this->generateFromToken($tokens[$i]);
+        }
+        if ($config->get('Output', 'TidyFormat') && extension_loaded('tidy')) {
+            
+            $tidy_options = array(
+               'indent'=> true,
+               'output-xhtml' => $this->_xhtml,
+               'show-body-only' => true,
+               'indent-spaces' => 2,
+               'wrap' => 68,
+            );
+            if (version_compare(PHP_VERSION, '5', '<')) {
+                tidy_set_encoding('utf8');
+                foreach ($tidy_options as $key => $value) {
+                    tidy_setopt($key, $value);
+                }
+                tidy_parse_string($html);
+                tidy_clean_repair();
+                $html = tidy_get_output();
+            } else {
+                $tidy = new Tidy;
+                $tidy->parseString($html, $tidy_options, 'utf8');
+                $tidy->cleanRepair();
+                $html = (string) $tidy;
+            }
+        }
+        // normalize newlines to system
+        $nl = $config->get('Output', 'Newline');
+        if ($nl === null) $nl = PHP_EOL;
+        $html = str_replace("\n", $nl, $html);
+        return $html;
+    }
+    
+    /**
+     * Generates HTML from a single token.
+     * @param $token HTMLPurifier_Token object.
+     * @return Generated HTML
+     */
+    public function generateFromToken($token) {
+        if (!isset($token->type)) return '';
+        if ($token->type == 'start') {
+            $attr = $this->generateAttributes($token->attr, $token->name);
+            return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
+            
+        } elseif ($token->type == 'end') {
+            return '</' . $token->name . '>';
+            
+        } elseif ($token->type == 'empty') {
+            $attr = $this->generateAttributes($token->attr, $token->name);
+             return '<' . $token->name . ($attr ? ' ' : '') . $attr .
+                ( $this->_xhtml ? ' /': '' )
+                . '>';
+            
+        } elseif ($token->type == 'text') {
+            return $this->escape($token->data);
+            
+        } else {
+            return '';
+            
+        }
+    }
+    
+    /**
+     * Special case processor for the contents of script tags
+     * @warning This runs into problems if there's already a literal
+     *          --> somewhere inside the script contents.
+     */
+    public function generateScriptFromToken($token) {
+        if ($token->type != 'text') return $this->generateFromToken($token);
+        // return '<!--' . "\n" . trim($token->data) . "\n" . '// -->';
+        // more advanced version:
+        // thanks <http://lachy.id.au/log/2005/05/script-comments>
+        $data = preg_replace('#//\s*$#', '', $token->data);
+        return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
+    }
+    
+    /**
+     * Generates attribute declarations from attribute array.
+     * @param $assoc_array_of_attributes Attribute array
+     * @return Generate HTML fragment for insertion.
+     */
+    public function generateAttributes($assoc_array_of_attributes, $element) {
+        $html = '';
+        foreach ($assoc_array_of_attributes as $key => $value) {
+            if (!$this->_xhtml) {
+                // remove namespaced attributes
+                if (strpos($key, ':') !== false) continue;
+                if (!empty($this->_def->info[$element]->attr[$key]->minimized)) {
+                    $html .= $key . ' ';
+                    continue;
+                }
+            }
+            $html .= $key.'="'.$this->escape($value).'" ';
+        }
+        return rtrim($html);
+    }
+    
+    /**
+     * Escapes raw text data.
+     * @param $string String data to escape for HTML.
+     * @return String escaped data.
+     */
+    public function escape($string) {
+        return htmlspecialchars($string, ENT_COMPAT, 'UTF-8');
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLDefinition.php

@@ -0,0 +1,461 @@
+<?php
+
+require_once 'HTMLPurifier/Definition.php';
+require_once 'HTMLPurifier/HTMLModuleManager.php';
+
+// this definition and its modules MUST NOT define configuration directives
+// outside of the HTML or Attr namespaces
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'DefinitionID', null, 'string/null', '
+<p>
+    Unique identifier for a custom-built HTML definition. If you edit
+    the raw version of the HTMLDefinition, introducing changes that the
+    configuration object does not reflect, you must specify this variable.
+    If you change your custom edits, you should change this directive, or
+    clear your cache. Example:
+</p>
+<pre>
+$config = HTMLPurifier_Config::createDefault();
+$config->set(\'HTML\', \'DefinitionID\', \'1\');
+$def = $config->getHTMLDefinition();
+$def->addAttribute(\'a\', \'tabindex\', \'Number\');
+</pre>
+<p>
+    In the above example, the configuration is still at the defaults, but
+    using the advanced API, an extra attribute has been added. The
+    configuration object normally has no way of knowing that this change
+    has taken place, so it needs an extra directive: %HTML.DefinitionID.
+    If someone else attempts to use the default configuration, these two
+    pieces of code will not clobber each other in the cache, since one has
+    an extra directive attached to it.
+</p>
+<p>
+    This directive has been available since 2.0.0, and in that version or
+    later you <em>must</em> specify a value to this directive to use the
+    advanced API features.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'DefinitionRev', 1, 'int', '
+<p>
+    Revision identifier for your custom definition specified in
+    %HTML.DefinitionID.  This serves the same purpose: uniquely identifying
+    your custom definition, but this one does so in a chronological
+    context: revision 3 is more up-to-date then revision 2.  Thus, when
+    this gets incremented, the cache handling is smart enough to clean
+    up any older revisions of your definition as well as flush the
+    cache.  This directive has been available since 2.0.0.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'BlockWrapper', 'p', 'string', '
+<p>
+    String name of element to wrap inline elements that are inside a block
+    context.  This only occurs in the children of blockquote in strict mode.
+</p>
+<p>
+    Example: by default value,
+    <code>&lt;blockquote&gt;Foo&lt;/blockquote&gt;</code> would become
+    <code>&lt;blockquote&gt;&lt;p&gt;Foo&lt;/p&gt;&lt;/blockquote&gt;</code>.
+    The <code>&lt;p&gt;</code> tags can be replaced with whatever you desire,
+    as long as it is a block level element. This directive has been available
+    since 1.3.0.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'Parent', 'div', 'string', '
+<p>
+    String name of element that HTML fragment passed to library will be 
+    inserted in.  An interesting variation would be using span as the 
+    parent element, meaning that only inline tags would be allowed. 
+    This directive has been available since 1.3.0.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'AllowedElements', null, 'lookup/null', '
+<p>
+    If HTML Purifier\'s tag set is unsatisfactory for your needs, you 
+    can overload it with your own list of tags to allow.  Note that this 
+    method is subtractive: it does its job by taking away from HTML Purifier 
+    usual feature set, so you cannot add a tag that HTML Purifier never 
+    supported in the first place (like embed, form or head).  If you 
+    change this, you probably also want to change %HTML.AllowedAttributes. 
+</p>
+<p>
+    <strong>Warning:</strong> If another directive conflicts with the 
+    elements here, <em>that</em> directive will win and override. 
+    This directive has been available since 1.3.0.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'AllowedAttributes', null, 'lookup/null', '
+<p>
+    If HTML Purifier\'s attribute set is unsatisfactory, overload it! 
+    The syntax is "tag.attr" or "*.attr" for the global attributes 
+    (style, id, class, dir, lang, xml:lang).
+</p>
+<p>
+    <strong>Warning:</strong> If another directive conflicts with the 
+    elements here, <em>that</em> directive will win and override. For 
+    example, %HTML.EnableAttrID will take precedence over *.id in this 
+    directive.  You must set that directive to true before you can use 
+    IDs at all. This directive has been available since 1.3.0.
+</p>
+');
+
+HTMLPurifier_ConfigSchema::define(
+    'HTML', 'Allowed', null, 'itext/null', '
+<p>
+    This is a convenience directive that rolls the functionality of
+    %HTML.AllowedElements and %HTML.AllowedAttributes into one directive.
+    Specify elements and attributes that are allowed using:
+    <code>element1[attr1|attr2],element2...</code>. You can also use
+    newlines instead of commas to separate elements.
+</p>
+<p>
+    <strong>Warning</strong>:
+    All of the constraints on the component directives are still enforced.
+    The syntax is a <em>subset</em> of TinyMCE\'s <code>valid_elements</code>
+    whitelist: directly copy-pasting it here will probably result in
+    broken whitelists. If %HTML.AllowedElements or %HTML.AllowedAttributes
+    are set, this directive has no effect.
+    This directive has been available since 2.0.0.
+</p>
+');
+
+/**
+ * Definition of the purified HTML that describes allowed children,
+ * attributes, and many other things.
+ * 
+ * Conventions:
+ * 
+ * All member variables that are prefixed with info
+ * (including the main $info array) are used by HTML Purifier internals
+ * and should not be directly edited when customizing the HTMLDefinition.
+ * They can usually be set via configuration directives or custom
+ * modules.
+ * 
+ * On the other hand, member variables without the info prefix are used
+ * internally by the HTMLDefinition and MUST NOT be used by other HTML
+ * Purifier internals. Many of them, however, are public, and may be
+ * edited by userspace code to tweak the behavior of HTMLDefinition.
+ * 
+ * @note This class is inspected by Printer_HTMLDefinition; please
+ *       update that class if things here change.
+ */
+class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
+{
+    
+    // FULLY-PUBLIC VARIABLES ---------------------------------------------
+    
+    /**
+     * Associative array of element names to HTMLPurifier_ElementDef
+     */
+    public $info = array();
+    
+    /**
+     * Associative array of global attribute name to attribute definition.
+     */
+    public $info_global_attr = array();
+    
+    /**
+     * String name of parent element HTML will be going into.
+     */
+    public $info_parent = 'div';
+    
+    /**
+     * Definition for parent element, allows parent element to be a
+     * tag that's not allowed inside the HTML fragment.
+     */
+    public $info_parent_def;
+    
+    /**
+     * String name of element used to wrap inline elements in block context
+     * @note This is rarely used except for BLOCKQUOTEs in strict mode
+     */
+    public $info_block_wrapper = 'p';
+    
+    /**
+     * Associative array of deprecated tag name to HTMLPurifier_TagTransform
+     */
+    public $info_tag_transform = array();
+    
+    /**
+     * Indexed list of HTMLPurifier_AttrTransform to be performed before validation.
+     */
+    public $info_attr_transform_pre = array();
+    
+    /**
+     * Indexed list of HTMLPurifier_AttrTransform to be performed after validation.
+     */
+    public $info_attr_transform_post = array();
+    
+    /**
+     * Nested lookup array of content set name (Block, Inline) to
+     * element name to whether or not it belongs in that content set.
+     */
+    public $info_content_sets = array();
+    
+    /**
+     * Doctype object
+     */
+    public $doctype;
+    
+    
+    
+    // RAW CUSTOMIZATION STUFF --------------------------------------------
+    
+    /**
+     * Adds a custom attribute to a pre-existing element
+     * @param $element_name String element name to add attribute to
+     * @param $attr_name String name of attribute
+     * @param $def Attribute definition, can be string or object, see
+     *             HTMLPurifier_AttrTypes for details
+     */
+    public function addAttribute($element_name, $attr_name, $def) {
+        $module =& $this->getAnonymousModule();
+        $element =& $module->addBlankElement($element_name);
+        $element->attr[$attr_name] = $def;
+    }
+    
+    /**
+     * Adds a custom element to your HTML definition
+     * @note See HTMLPurifier_HTMLModule::addElement for detailed 
+     *       parameter and return value descriptions.
+     */
+    public function &addElement($element_name, $type, $contents, $attr_collections, $attributes) {
+        $module =& $this->getAnonymousModule();
+        // assume that if the user is calling this, the element
+        // is safe. This may not be a good idea
+        $element =& $module->addElement($element_name, true, $type, $contents, $attr_collections, $attributes);
+        return $element;
+    }
+    
+    /**
+     * Adds a blank element to your HTML definition, for overriding
+     * existing behavior
+     * @note See HTMLPurifier_HTMLModule::addBlankElement for detailed
+     *       parameter and return value descriptions.
+     */
+    public function &addBlankElement($element_name) {
+        $module  =& $this->getAnonymousModule();
+        $element =& $module->addBlankElement($element_name);
+        return $element;
+    }
+    
+    /**
+     * Retrieves a reference to the anonymous module, so you can
+     * bust out advanced features without having to make your own
+     * module.
+     */
+    public function &getAnonymousModule() {
+        if (!$this->_anonModule) {
+            $this->_anonModule = new HTMLPurifier_HTMLModule();
+            $this->_anonModule->name = 'Anonymous';
+        }
+        return $this->_anonModule;
+    }
+    
+    private $_anonModule;
+    
+    
+    // PUBLIC BUT INTERNAL VARIABLES --------------------------------------
+    
+    public $type = 'HTML';
+    public $manager; /**< Instance of HTMLPurifier_HTMLModuleManager */
+    
+    /**
+     * Performs low-cost, preliminary initialization.
+     */
+    public function __construct() {
+        $this->manager = new HTMLPurifier_HTMLModuleManager();
+    }
+    
+    protected function doSetup($config) {
+        $this->processModules($config);
+        $this->setupConfigStuff($config);
+        unset($this->manager);
+        
+        // cleanup some of the element definitions
+        foreach ($this->info as $k => $v) {
+            unset($this->info[$k]->content_model);
+            unset($this->info[$k]->content_model_type);
+        }
+    }
+    
+    /**
+     * Extract out the information from the manager
+     */
+    protected function processModules($config) {
+        
+        if ($this->_anonModule) {
+            // for user specific changes
+            // this is late-loaded so we don't have to deal with PHP4
+            // reference wonky-ness
+            $this->manager->addModule($this->_anonModule);
+            unset($this->_anonModule);
+        }
+        
+        $this->manager->setup($config);
+        $this->doctype = $this->manager->doctype;
+        
+        foreach ($this->manager->modules as $module) {
+            foreach($module->info_tag_transform         as $k => $v) {
+                if ($v === false) unset($this->info_tag_transform[$k]);
+                else $this->info_tag_transform[$k] = $v;
+            }
+            foreach($module->info_attr_transform_pre    as $k => $v) {
+                if ($v === false) unset($this->info_attr_transform_pre[$k]);
+                else $this->info_attr_transform_pre[$k] = $v;
+            }
+            foreach($module->info_attr_transform_post   as $k => $v) {
+                if ($v === false) unset($this->info_attr_transform_post[$k]);
+                else $this->info_attr_transform_post[$k] = $v;
+            }
+        }
+        
+        $this->info = $this->manager->getElements();
+        $this->info_content_sets = $this->manager->contentSets->lookup;
+        
+    }
+    
+    /**
+     * Sets up stuff based on config. We need a better way of doing this.
+     */
+    protected function setupConfigStuff($config) {
+        
+        $block_wrapper = $config->get('HTML', 'BlockWrapper');
+        if (isset($this->info_content_sets['Block'][$block_wrapper])) {
+            $this->info_block_wrapper = $block_wrapper;
+        } else {
+            trigger_error('Cannot use non-block element as block wrapper',
+                E_USER_ERROR);
+        }
+        
+        $parent = $config->get('HTML', 'Parent');
+        $def = $this->manager->getElement($parent, true);
+        if ($def) {
+            $this->info_parent = $parent;
+            $this->info_parent_def = $def;
+        } else {
+            trigger_error('Cannot use unrecognized element as parent',
+                E_USER_ERROR);
+            $this->info_parent_def = $this->manager->getElement($this->info_parent, true);
+        }
+        
+        // support template text
+        $support = "(for information on implementing this, see the ".
+                   "support forums) ";
+        
+        // setup allowed elements
+        
+        $allowed_elements = $config->get('HTML', 'AllowedElements');
+        $allowed_attributes = $config->get('HTML', 'AllowedAttributes');
+        
+        if (!is_array($allowed_elements) && !is_array($allowed_attributes)) {
+            $allowed = $config->get('HTML', 'Allowed');
+            if (is_string($allowed)) {
+                list($allowed_elements, $allowed_attributes) = $this->parseTinyMCEAllowedList($allowed);
+            }
+        }
+        
+        if (is_array($allowed_elements)) {
+            foreach ($this->info as $name => $d) {
+                if(!isset($allowed_elements[$name])) unset($this->info[$name]);
+                unset($allowed_elements[$name]);
+            }
+            // emit errors
+            foreach ($allowed_elements as $element => $d) {
+                $element = htmlspecialchars($element);
+                trigger_error("Element '$element' is not supported $support", E_USER_WARNING);
+            }
+        }
+        
+        $allowed_attributes_mutable = $allowed_attributes; // by copy!
+        if (is_array($allowed_attributes)) {
+            foreach ($this->info_global_attr as $attr_key => $info) {
+                if (!isset($allowed_attributes["*.$attr_key"])) {
+                    unset($this->info_global_attr[$attr_key]);
+                } elseif (isset($allowed_attributes_mutable["*.$attr_key"])) {
+                    unset($allowed_attributes_mutable["*.$attr_key"]);
+                }
+            }
+            foreach ($this->info as $tag => $info) {
+                foreach ($info->attr as $attr => $attr_info) {
+                    if (!isset($allowed_attributes["$tag.$attr"]) &&
+                        !isset($allowed_attributes["*.$attr"])) {
+                        unset($this->info[$tag]->attr[$attr]);
+                    } else {
+                        if (isset($allowed_attributes_mutable["$tag.$attr"])) {
+                            unset($allowed_attributes_mutable["$tag.$attr"]);
+                        } elseif (isset($allowed_attributes_mutable["*.$attr"])) {
+                            unset($allowed_attributes_mutable["*.$attr"]);
+                        }
+                    }
+                }
+            }
+            // emit errors
+            foreach ($allowed_attributes_mutable as $elattr => $d) {
+                list($element, $attribute) = explode('.', $elattr);
+                $element = htmlspecialchars($element);
+                $attribute = htmlspecialchars($attribute);
+                if ($element == '*') {
+                    trigger_error("Global attribute '$attribute' is not ".
+                        "supported in any elements $support",
+                        E_USER_WARNING);
+                } else {
+                    trigger_error("Attribute '$attribute' in element '$element' not supported $support",
+                        E_USER_WARNING);
+                }
+            }
+        }
+        
+    }
+    
+    /**
+     * Parses a TinyMCE-flavored Allowed Elements and Attributes list into
+     * separate lists for processing. Format is element[attr1|attr2],element2...
+     * @warning Although it's largely drawn from TinyMCE's implementation,
+     *      it is different, and you'll probably have to modify your lists
+     * @param $list String list to parse
+     * @param array($allowed_elements, $allowed_attributes)
+     * @todo Give this its own class, probably static interface
+     */
+    public function parseTinyMCEAllowedList($list) {
+        
+        $elements = array();
+        $attributes = array();
+        
+        $chunks = preg_split('/(,|[\n\r]+)/', $list);
+        foreach ($chunks as $chunk) {
+            if (empty($chunk)) continue;
+            // remove TinyMCE element control characters
+            if (!strpos($chunk, '[')) {
+                $element = $chunk;
+                $attr = false;
+            } else {
+                list($element, $attr) = explode('[', $chunk);
+            }
+            if ($element !== '*') $elements[$element] = true;
+            if (!$attr) continue;
+            $attr = substr($attr, 0, strlen($attr) - 1); // remove trailing ]
+            $attr = explode('|', $attr);
+            foreach ($attr as $key) {
+                $attributes["$element.$key"] = true;
+            }
+        }
+        
+        return array($elements, $attributes);
+        
+    }
+    
+    
+}
+
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule.php

@@ -0,0 +1,213 @@
+<?php
+
+/**
+ * Represents an XHTML 1.1 module, with information on elements, tags
+ * and attributes.
+ * @note Even though this is technically XHTML 1.1, it is also used for
+ *       regular HTML parsing. We are using modulization as a convenient
+ *       way to represent the internals of HTMLDefinition, and our
+ *       implementation is by no means conforming and does not directly
+ *       use the normative DTDs or XML schemas.
+ * @note The public variables in a module should almost directly
+ *       correspond to the variables in HTMLPurifier_HTMLDefinition.
+ *       However, the prefix info carries no special meaning in these
+ *       objects (include it anyway if that's the correspondence though).
+ * @todo Consider making some member functions protected
+ */
+
+class HTMLPurifier_HTMLModule
+{
+    
+    // -- Overloadable ----------------------------------------------------
+    
+    /**
+     * Short unique string identifier of the module
+     */
+    public $name;
+    
+    /**
+     * Informally, a list of elements this module changes. Not used in
+     * any significant way.
+     */
+    public $elements = array();
+    
+    /**
+     * Associative array of element names to element definitions.
+     * Some definitions may be incomplete, to be merged in later
+     * with the full definition.
+     */
+    public $info = array();
+    
+    /**
+     * Associative array of content set names to content set additions.
+     * This is commonly used to, say, add an A element to the Inline
+     * content set. This corresponds to an internal variable $content_sets
+     * and NOT info_content_sets member variable of HTMLDefinition.
+     */
+    public $content_sets = array();
+    
+    /**
+     * Associative array of attribute collection names to attribute
+     * collection additions. More rarely used for adding attributes to
+     * the global collections. Example is the StyleAttribute module adding
+     * the style attribute to the Core. Corresponds to HTMLDefinition's
+     * attr_collections->info, since the object's data is only info,
+     * with extra behavior associated with it.
+     */
+    public $attr_collections = array();
+    
+    /**
+     * Associative array of deprecated tag name to HTMLPurifier_TagTransform
+     */
+    public $info_tag_transform = array();
+    
+    /**
+     * List of HTMLPurifier_AttrTransform to be performed before validation.
+     */
+    public $info_attr_transform_pre = array();
+    
+    /**
+     * List of HTMLPurifier_AttrTransform to be performed after validation.
+     */
+    public $info_attr_transform_post = array();
+    
+    /**
+     * Boolean flag that indicates whether or not getChildDef is implemented.
+     * For optimization reasons: may save a call to a function. Be sure
+     * to set it if you do implement getChildDef(), otherwise it will have
+     * no effect!
+     */
+    public $defines_child_def = false;
+    
+    /**
+     * Retrieves a proper HTMLPurifier_ChildDef subclass based on 
+     * content_model and content_model_type member variables of
+     * the HTMLPurifier_ElementDef class. There is a similar function
+     * in HTMLPurifier_HTMLDefinition.
+     * @param $def HTMLPurifier_ElementDef instance
+     * @return HTMLPurifier_ChildDef subclass
+     */
+    public function getChildDef($def) {return false;}
+    
+    // -- Convenience -----------------------------------------------------
+    
+    /**
+     * Convenience function that sets up a new element
+     * @param $element Name of element to add
+     * @param $safe Is element safe for untrusted users to use?
+     * @param $type What content set should element be registered to?
+     *              Set as false to skip this step.
+     * @param $contents Allowed children in form of:
+     *              "$content_model_type: $content_model"
+     * @param $attr_includes What attribute collections to register to
+     *              element?
+     * @param $attr What unique attributes does the element define?
+     * @note See ElementDef for in-depth descriptions of these parameters.
+     * @return Reference to created element definition object, so you 
+     *         can set advanced parameters
+     */
+    public function &addElement($element, $safe, $type, $contents, $attr_includes = array(), $attr = array()) {
+        $this->elements[] = $element;
+        // parse content_model
+        list($content_model_type, $content_model) = $this->parseContents($contents);
+        // merge in attribute inclusions
+        $this->mergeInAttrIncludes($attr, $attr_includes);
+        // add element to content sets
+        if ($type) $this->addElementToContentSet($element, $type);
+        // create element
+        $this->info[$element] = HTMLPurifier_ElementDef::create(
+            $safe, $content_model, $content_model_type, $attr
+        );
+        // literal object $contents means direct child manipulation
+        if (!is_string($contents)) $this->info[$element]->child = $contents;
+        return $this->info[$element];
+    }
+    
+    /**
+     * Convenience function that creates a totally blank, non-standalone
+     * element.
+     * @param $element Name of element to create
+     * @return Reference to created element
+     */
+    public function &addBlankElement($element) {
+        if (!isset($this->info[$element])) {
+            $this->elements[] = $element;
+            $this->info[$element] = new HTMLPurifier_ElementDef();
+            $this->info[$element]->standalone = false;
+        } else {
+            trigger_error("Definition for $element already exists in module, cannot redefine");
+        }
+        return $this->info[$element];
+    }
+    
+    /**
+     * Convenience function that registers an element to a content set
+     * @param Element to register
+     * @param Name content set (warning: case sensitive, usually upper-case
+     *        first letter)
+     */
+    public function addElementToContentSet($element, $type) {
+        if (!isset($this->content_sets[$type])) $this->content_sets[$type] = '';
+        else $this->content_sets[$type] .= ' | ';
+        $this->content_sets[$type] .= $element;
+    }
+    
+    /**
+     * Convenience function that transforms single-string contents
+     * into separate content model and content model type
+     * @param $contents Allowed children in form of:
+     *                  "$content_model_type: $content_model"
+     * @note If contents is an object, an array of two nulls will be
+     *       returned, and the callee needs to take the original $contents
+     *       and use it directly.
+     */
+    public function parseContents($contents) {
+        if (!is_string($contents)) return array(null, null); // defer
+        switch ($contents) {
+            // check for shorthand content model forms
+            case 'Empty':
+                return array('empty', '');
+            case 'Inline':
+                return array('optional', 'Inline | #PCDATA');
+            case 'Flow':
+                return array('optional', 'Flow | #PCDATA');
+        }
+        list($content_model_type, $content_model) = explode(':', $contents);
+        $content_model_type = strtolower(trim($content_model_type));
+        $content_model = trim($content_model);
+        return array($content_model_type, $content_model);
+    }
+    
+    /**
+     * Convenience function that merges a list of attribute includes into
+     * an attribute array.
+     * @param $attr Reference to attr array to modify
+     * @param $attr_includes Array of includes / string include to merge in
+     */
+    public function mergeInAttrIncludes(&$attr, $attr_includes) {
+        if (!is_array($attr_includes)) {
+            if (empty($attr_includes)) $attr_includes = array();
+            else $attr_includes = array($attr_includes);
+        }
+        $attr[0] = $attr_includes;
+    }
+    
+    /**
+     * Convenience function that generates a lookup table with boolean
+     * true as value.
+     * @param $list List of values to turn into a lookup
+     * @note You can also pass an arbitrary number of arguments in
+     *       place of the regular argument
+     * @return Lookup array equivalent of list
+     */
+    public function makeLookup($list) {
+        if (is_string($list)) $list = func_get_args();
+        $ret = array();
+        foreach ($list as $value) {
+            if (is_null($value)) continue;
+            $ret[$value] = true;
+        }
+        return $ret;
+    }
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/Bdo.php

@@ -0,0 +1,33 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+require_once 'HTMLPurifier/AttrTransform/BdoDir.php';
+
+/**
+ * XHTML 1.1 Bi-directional Text Module, defines elements that
+ * declare directionality of content. Text Extension Module.
+ */
+class HTMLPurifier_HTMLModule_Bdo extends HTMLPurifier_HTMLModule
+{
+    
+    public $name = 'Bdo';
+    public $attr_collections = array(
+        'I18N' => array('dir' => false)
+    );
+    
+    public function __construct() {
+        $bdo =& $this->addElement(
+            'bdo', true, 'Inline', 'Inline', array('Core', 'Lang'),
+            array(
+                'dir' => 'Enum#ltr,rtl', // required
+                // The Abstract Module specification has the attribute
+                // inclusions wrong for bdo: bdo allows Lang
+            )
+        );
+        $bdo->attr_transform_post['required-dir'] = new HTMLPurifier_AttrTransform_BdoDir();
+        
+        $this->attr_collections['I18N']['dir'] = 'Enum#ltr,rtl';
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/CommonAttributes.php

@@ -0,0 +1,26 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+
+class HTMLPurifier_HTMLModule_CommonAttributes extends HTMLPurifier_HTMLModule
+{
+    public $name = 'CommonAttributes';
+    
+    public $attr_collections = array(
+        'Core' => array(
+            0 => array('Style'),
+            // 'xml:space' => false,
+            'class' => 'NMTOKENS',
+            'id' => 'ID',
+            'title' => 'CDATA',
+        ),
+        'Lang' => array(),
+        'I18N' => array(
+            0 => array('Lang'), // proprietary, for xml:lang/lang
+        ),
+        'Common' => array(
+            0 => array('Core', 'I18N')
+        )
+    );
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/Edit.php

@@ -0,0 +1,40 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+require_once 'HTMLPurifier/ChildDef/Chameleon.php';
+
+/**
+ * XHTML 1.1 Edit Module, defines editing-related elements. Text Extension
+ * Module.
+ */
+class HTMLPurifier_HTMLModule_Edit extends HTMLPurifier_HTMLModule
+{
+    
+    public $name = 'Edit';
+    
+    public function __construct() {
+        $contents = 'Chameleon: #PCDATA | Inline ! #PCDATA | Flow';
+        $attr = array(
+            'cite' => 'URI',
+            // 'datetime' => 'Datetime', // not implemented
+        );
+        $this->addElement('del', true, 'Inline', $contents, 'Common', $attr);
+        $this->addElement('ins', true, 'Inline', $contents, 'Common', $attr);
+    }
+    
+    // HTML 4.01 specifies that ins/del must not contain block
+    // elements when used in an inline context, chameleon is
+    // a complicated workaround to acheive this effect
+    
+    // Inline context ! Block context (exclamation mark is
+    // separator, see getChildDef for parsing)
+    
+    public $defines_child_def = true;
+    public function getChildDef($def) {
+        if ($def->content_model_type != 'chameleon') return false;
+        $value = explode('!', $def->content_model);
+        return new HTMLPurifier_ChildDef_Chameleon($value[0], $value[1]);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/Hypertext.php

@@ -0,0 +1,32 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+require_once 'HTMLPurifier/AttrDef/HTML/LinkTypes.php';
+
+/**
+ * XHTML 1.1 Hypertext Module, defines hypertext links. Core Module.
+ */
+class HTMLPurifier_HTMLModule_Hypertext extends HTMLPurifier_HTMLModule
+{
+    
+    public $name = 'Hypertext';
+    
+    public function __construct() {
+        $a =& $this->addElement(
+            'a', true, 'Inline', 'Inline', 'Common',
+            array(
+                // 'accesskey' => 'Character',
+                // 'charset' => 'Charset',
+                'href' => 'URI',
+                // 'hreflang' => 'LanguageCode',
+                'rel' => new HTMLPurifier_AttrDef_HTML_LinkTypes('rel'),
+                'rev' => new HTMLPurifier_AttrDef_HTML_LinkTypes('rev'),
+                // 'tabindex' => 'Number',
+                // 'type' => 'ContentType',
+            )
+        );
+        $a->excludes = array('a' => true);
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/Image.php

@@ -0,0 +1,36 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+
+require_once 'HTMLPurifier/AttrDef/URI.php';
+require_once 'HTMLPurifier/AttrTransform/ImgRequired.php';
+
+/**
+ * XHTML 1.1 Image Module provides basic image embedding.
+ * @note There is specialized code for removing empty images in
+ *       HTMLPurifier_Strategy_RemoveForeignElements
+ */
+class HTMLPurifier_HTMLModule_Image extends HTMLPurifier_HTMLModule
+{
+    
+    public $name = 'Image';
+    
+    public function __construct() {
+        $img =& $this->addElement(
+            'img', true, 'Inline', 'Empty', 'Common',
+            array(
+                'alt*' => 'Text',
+                'height' => 'Length',
+                'longdesc' => 'URI', 
+                'src*' => new HTMLPurifier_AttrDef_URI(true), // embedded
+                'width' => 'Length'
+            )
+        );
+        // kind of strange, but splitting things up would be inefficient
+        $img->attr_transform_pre[] =
+        $img->attr_transform_post[] =
+            new HTMLPurifier_AttrTransform_ImgRequired();
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/Legacy.php

@@ -0,0 +1,138 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef/HTML/Bool.php';
+
+/**
+ * XHTML 1.1 Legacy module defines elements that were previously 
+ * deprecated.
+ * 
+ * @note Not all legacy elements have been implemented yet, which
+ *       is a bit of a reverse problem as compared to browsers! In
+ *       addition, this legacy module may implement a bit more than
+ *       mandated by XHTML 1.1.
+ * 
+ * This module can be used in combination with TransformToStrict in order
+ * to transform as many deprecated elements as possible, but retain
+ * questionably deprecated elements that do not have good alternatives
+ * as well as transform elements that don't have an implementation.
+ * See docs/ref-strictness.txt for more details.
+ */
+
+class HTMLPurifier_HTMLModule_Legacy extends HTMLPurifier_HTMLModule
+{
+    
+    public $name = 'Legacy';
+    
+    public function __construct() {
+        
+        $this->addElement('basefont', true, 'Inline', 'Empty', false, array(
+            'color' => 'Color',
+            'face' => 'Text', // extremely broad, we should
+            'size' => 'Text', // tighten it
+            'id' => 'ID'
+        ));
+        $this->addElement('center', true, 'Block', 'Flow', 'Common');
+        $this->addElement('dir', true, 'Block', 'Required: li', 'Common', array(
+            'compact' => 'Bool#compact'
+        ));
+        $this->addElement('font', true, 'Inline', 'Inline', array('Core', 'I18N'), array(
+            'color' => 'Color',
+            'face' => 'Text', // extremely broad, we should
+            'size' => 'Text', // tighten it
+        ));
+        $this->addElement('menu', true, 'Block', 'Required: li', 'Common', array(
+            'compact' => 'Bool#compact'
+        ));
+        $this->addElement('s', true, 'Inline', 'Inline', 'Common');
+        $this->addElement('strike', true, 'Inline', 'Inline', 'Common');
+        $this->addElement('u', true, 'Inline', 'Inline', 'Common');
+        
+        // setup modifications to old elements
+        
+        $align = 'Enum#left,right,center,justify';
+        
+        $address =& $this->addBlankElement('address');
+        $address->content_model = 'Inline | #PCDATA | p';
+        $address->content_model_type = 'optional';
+        $address->child = false;
+        
+        $blockquote =& $this->addBlankElement('blockquote');
+        $blockquote->content_model = 'Flow | #PCDATA';
+        $blockquote->content_model_type = 'optional';
+        $blockquote->child = false;
+        
+        $br =& $this->addBlankElement('br');
+        $br->attr['clear'] = 'Enum#left,all,right,none';
+        
+        $caption =& $this->addBlankElement('caption');
+        $caption->attr['align'] = 'Enum#top,bottom,left,right';
+        
+        $div =& $this->addBlankElement('div');
+        $div->attr['align'] = $align;
+        
+        $dl =& $this->addBlankElement('dl');
+        $dl->attr['compact'] = 'Bool#compact';
+        
+        for ($i = 1; $i <= 6; $i++) {
+            $h =& $this->addBlankElement("h$i");
+            $h->attr['align'] = $align;
+        }
+        
+        $hr =& $this->addBlankElement('hr');
+        $hr->attr['align'] = $align;
+        $hr->attr['noshade'] = 'Bool#noshade';
+        $hr->attr['size'] = 'Pixels';
+        $hr->attr['width'] = 'Length';
+        
+        $img =& $this->addBlankElement('img');
+        $img->attr['align'] = 'Enum#top,middle,bottom,left,right';
+        $img->attr['border'] = 'Pixels';
+        $img->attr['hspace'] = 'Pixels';
+        $img->attr['vspace'] = 'Pixels';
+        
+        // figure out this integer business
+        
+        $li =& $this->addBlankElement('li');
+        $li->attr['value'] = new HTMLPurifier_AttrDef_Integer();
+        $li->attr['type']  = 'Enum#s:1,i,I,a,A,disc,square,circle';
+        
+        $ol =& $this->addBlankElement('ol');
+        $ol->attr['compact'] = 'Bool#compact';
+        $ol->attr['start'] = new HTMLPurifier_AttrDef_Integer();
+        $ol->attr['type'] = 'Enum#s:1,i,I,a,A';
+        
+        $p =& $this->addBlankElement('p');
+        $p->attr['align'] = $align;
+        
+        $pre =& $this->addBlankElement('pre');
+        $pre->attr['width'] = 'Number';
+        
+        // script omitted
+        
+        $table =& $this->addBlankElement('table');
+        $table->attr['align'] = 'Enum#left,center,right';
+        $table->attr['bgcolor'] = 'Color';
+        
+        $tr =& $this->addBlankElement('tr');
+        $tr->attr['bgcolor'] = 'Color';
+        
+        $th =& $this->addBlankElement('th');
+        $th->attr['bgcolor'] = 'Color';
+        $th->attr['height'] = 'Length';
+        $th->attr['nowrap'] = 'Bool#nowrap';
+        $th->attr['width'] = 'Length';
+        
+        $td =& $this->addBlankElement('td');
+        $td->attr['bgcolor'] = 'Color';
+        $td->attr['height'] = 'Length';
+        $td->attr['nowrap'] = 'Bool#nowrap';
+        $td->attr['width'] = 'Length';
+        
+        $ul =& $this->addBlankElement('ul');
+        $ul->attr['compact'] = 'Bool#compact';
+        $ul->attr['type'] = 'Enum#square,disc,circle';
+        
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/List.php

@@ -0,0 +1,36 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+
+/**
+ * XHTML 1.1 List Module, defines list-oriented elements. Core Module.
+ */
+class HTMLPurifier_HTMLModule_List extends HTMLPurifier_HTMLModule
+{
+    
+    public $name = 'List';
+    
+    // According to the abstract schema, the List content set is a fully formed
+    // one or more expr, but it invariably occurs in an optional declaration
+    // so we're not going to do that subtlety. It might cause trouble
+    // if a user defines "List" and expects that multiple lists are
+    // allowed to be specified, but then again, that's not very intuitive.
+    // Furthermore, the actual XML Schema may disagree. Regardless,
+    // we don't have support for such nested expressions without using
+    // the incredibly inefficient and draconic Custom ChildDef.
+    
+    public $content_sets = array('Flow' => 'List');
+    
+    public function __construct() {
+        $this->addElement('ol', true, 'List', 'Required: li', 'Common');
+        $this->addElement('ul', true, 'List', 'Required: li', 'Common');
+        $this->addElement('dl', true, 'List', 'Required: dt | dd', 'Common');
+        
+        $this->addElement('li', true, false, 'Flow', 'Common');
+        
+        $this->addElement('dd', true, false, 'Flow', 'Common');
+        $this->addElement('dt', true, false, 'Inline', 'Common');
+    }
+    
+}
+

lib/htmlpurifier-3.0.0/library/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php

@@ -0,0 +1,15 @@
+<?php
+
+require_once 'HTMLPurifier/HTMLModule.php';
+
+class HTMLPurifier_HTMLModule_NonXMLCommonAttributes extends HTMLPurifier_HTMLModule
+{
+    public $name = 'NonXMLCommonAttributes';
+    
+    public $attr_collections = array(
+        'Lang' => array(
+            'lang' => 'LanguageCode',
+        )
+    );
+}
+