:arrow_up: Update HTML Purifier library.

Updated HTML Purifier from 4.6.0 to 4.9.2 with better PHP7 compatibility.
Used composer to manage this library.

6 files changed, 0 insertions, 1080 deletions

diff --git a/library/HTMLPurifier/Strategy/Composite.php b/library/HTMLPurifier/Strategy/Composite.php
deleted file mode 100644
index d7d35ce7d..000000000
--- a/library/HTMLPurifier/Strategy/Composite.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php
-
-/**
- * Composite strategy that runs multiple strategies on tokens.
- */
-abstract class HTMLPurifier_Strategy_Composite extends HTMLPurifier_Strategy
-{
-
-    /**
-     * List of strategies to run tokens through.
-     * @type HTMLPurifier_Strategy[]
-     */
-    protected $strategies = array();
-
-    /**
-     * @param HTMLPurifier_Token[] $tokens
-     * @param HTMLPurifier_Config $config
-     * @param HTMLPurifier_Context $context
-     * @return HTMLPurifier_Token[]
-     */
-    public function execute($tokens, $config, $context)
-    {
-        foreach ($this->strategies as $strategy) {
-            $tokens = $strategy->execute($tokens, $config, $context);
-        }
-        return $tokens;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/Core.php b/library/HTMLPurifier/Strategy/Core.php
deleted file mode 100644
index 4414c17d6..000000000
--- a/library/HTMLPurifier/Strategy/Core.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-/**
- * Core strategy composed of the big four strategies.
- */
-class HTMLPurifier_Strategy_Core extends HTMLPurifier_Strategy_Composite
-{
-    public function __construct()
-    {
-        $this->strategies[] = new HTMLPurifier_Strategy_RemoveForeignElements();
-        $this->strategies[] = new HTMLPurifier_Strategy_MakeWellFormed();
-        $this->strategies[] = new HTMLPurifier_Strategy_FixNesting();
-        $this->strategies[] = new HTMLPurifier_Strategy_ValidateAttributes();
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/FixNesting.php b/library/HTMLPurifier/Strategy/FixNesting.php
deleted file mode 100644
index 6fa673db9..000000000
--- a/library/HTMLPurifier/Strategy/FixNesting.php
+++ /dev/null
@@ -1,181 +0,0 @@
-<?php
-
-/**
- * Takes a well formed list of tokens and fixes their nesting.
- *
- * HTML elements dictate which elements are allowed to be their children,
- * for example, you can't have a p tag in a span tag.  Other elements have
- * much more rigorous definitions: tables, for instance, require a specific
- * order for their elements.  There are also constraints not expressible by
- * document type definitions, such as the chameleon nature of ins/del
- * tags and global child exclusions.
- *
- * The first major objective of this strategy is to iterate through all
- * the nodes and determine whether or not their children conform to the
- * element's definition.  If they do not, the child definition may
- * optionally supply an amended list of elements that is valid or
- * require that the entire node be deleted (and the previous node
- * rescanned).
- *
- * The second objective is to ensure that explicitly excluded elements of
- * an element do not appear in its children.  Code that accomplishes this
- * task is pervasive through the strategy, though the two are distinct tasks
- * and could, theoretically, be seperated (although it's not recommended).
- *
- * @note Whether or not unrecognized children are silently dropped or
- *       translated into text depends on the child definitions.
- *
- * @todo Enable nodes to be bubbled out of the structure.  This is
- *       easier with our new algorithm.
- */
-
-class HTMLPurifier_Strategy_FixNesting extends HTMLPurifier_Strategy
-{
-
-    /**
-     * @param HTMLPurifier_Token[] $tokens
-     * @param HTMLPurifier_Config $config
-     * @param HTMLPurifier_Context $context
-     * @return array|HTMLPurifier_Token[]
-     */
-    public function execute($tokens, $config, $context)
-    {
-
-        //####################################################################//
-        // Pre-processing
-
-        // O(n) pass to convert to a tree, so that we can efficiently
-        // refer to substrings
-        $top_node = HTMLPurifier_Arborize::arborize($tokens, $config, $context);
-
-        // get a copy of the HTML definition
-        $definition = $config->getHTMLDefinition();
-
-        $excludes_enabled = !$config->get('Core.DisableExcludes');
-
-        // setup the context variable 'IsInline', for chameleon processing
-        // is 'false' when we are not inline, 'true' when it must always
-        // be inline, and an integer when it is inline for a certain
-        // branch of the document tree
-        $is_inline = $definition->info_parent_def->descendants_are_inline;
-        $context->register('IsInline', $is_inline);
-
-        // setup error collector
-        $e =& $context->get('ErrorCollector', true);
-
-        //####################################################################//
-        // Loop initialization
-
-        // stack that contains all elements that are excluded
-        // it is organized by parent elements, similar to $stack,
-        // but it is only populated when an element with exclusions is
-        // processed, i.e. there won't be empty exclusions.
-        $exclude_stack = array($definition->info_parent_def->excludes);
-
-        // variable that contains the start token while we are processing
-        // nodes. This enables error reporting to do its job
-        $node = $top_node;
-        // dummy token
-        list($token, $d) = $node->toTokenPair();
-        $context->register('CurrentNode', $node);
-        $context->register('CurrentToken', $token);
-
-        //####################################################################//
-        // Loop
-
-        // We need to implement a post-order traversal iteratively, to
-        // avoid running into stack space limits.  This is pretty tricky
-        // to reason about, so we just manually stack-ify the recursive
-        // variant:
-        //
-        //  function f($node) {
-        //      foreach ($node->children as $child) {
-        //          f($child);
-        //      }
-        //      validate($node);
-        //  }
-        //
-        // Thus, we will represent a stack frame as array($node,
-        // $is_inline, stack of children)
-        // e.g. array_reverse($node->children) - already processed
-        // children.
-
-        $parent_def = $definition->info_parent_def;
-        $stack = array(
-            array($top_node,
-                  $parent_def->descendants_are_inline,
-                  $parent_def->excludes, // exclusions
-                  0)
-            );
-
-        while (!empty($stack)) {
-            list($node, $is_inline, $excludes, $ix) = array_pop($stack);
-            // recursive call
-            $go = false;
-            $def = empty($stack) ? $definition->info_parent_def : $definition->info[$node->name];
-            while (isset($node->children[$ix])) {
-                $child = $node->children[$ix++];
-                if ($child instanceof HTMLPurifier_Node_Element) {
-                    $go = true;
-                    $stack[] = array($node, $is_inline, $excludes, $ix);
-                    $stack[] = array($child,
-                        // ToDo: I don't think it matters if it's def or
-                        // child_def, but double check this...
-                        $is_inline || $def->descendants_are_inline,
-                        empty($def->excludes) ? $excludes
-                                              : array_merge($excludes, $def->excludes),
-                        0);
-                    break;
-                }
-            };
-            if ($go) continue;
-            list($token, $d) = $node->toTokenPair();
-            // base case
-            if ($excludes_enabled && isset($excludes[$node->name])) {
-                $node->dead = true;
-                if ($e) $e->send(E_ERROR, 'Strategy_FixNesting: Node excluded');
-            } else {
-                // XXX I suppose it would be slightly more efficient to
-                // avoid the allocation here and have children
-                // strategies handle it
-                $children = array();
-                foreach ($node->children as $child) {
-                    if (!$child->dead) $children[] = $child;
-                }
-                $result = $def->child->validateChildren($children, $config, $context);
-                if ($result === true) {
-                    // nop
-                    $node->children = $children;
-                } elseif ($result === false) {
-                    $node->dead = true;
-                    if ($e) $e->send(E_ERROR, 'Strategy_FixNesting: Node removed');
-                } else {
-                    $node->children = $result;
-                    if ($e) {
-                        // XXX This will miss mutations of internal nodes. Perhaps defer to the child validators
-                        if (empty($result) && !empty($children)) {
-                            $e->send(E_ERROR, 'Strategy_FixNesting: Node contents removed');
-                        } else if ($result != $children) {
-                            $e->send(E_WARNING, 'Strategy_FixNesting: Node reorganized');
-                        }
-                    }
-                }
-            }
-        }
-
-        //####################################################################//
-        // Post-processing
-
-        // remove context variables
-        $context->destroy('IsInline');
-        $context->destroy('CurrentNode');
-        $context->destroy('CurrentToken');
-
-        //####################################################################//
-        // Return
-
-        return HTMLPurifier_Arborize::flatten($node, $config, $context);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/MakeWellFormed.php b/library/HTMLPurifier/Strategy/MakeWellFormed.php
deleted file mode 100644
index e389e0011..000000000
--- a/library/HTMLPurifier/Strategy/MakeWellFormed.php
+++ /dev/null
@@ -1,600 +0,0 @@
-<?php
-
-/**
- * Takes tokens makes them well-formed (balance end tags, etc.)
- *
- * Specification of the armor attributes this strategy uses:
- *
- *      - MakeWellFormed_TagClosedError: This armor field is used to
- *        suppress tag closed errors for certain tokens [TagClosedSuppress],
- *        in particular, if a tag was generated automatically by HTML
- *        Purifier, we may rely on our infrastructure to close it for us
- *        and shouldn't report an error to the user [TagClosedAuto].
- */
-class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
-{
-
-    /**
-     * Array stream of tokens being processed.
-     * @type HTMLPurifier_Token[]
-     */
-    protected $tokens;
-
-    /**
-     * Current token.
-     * @type HTMLPurifier_Token
-     */
-    protected $token;
-
-    /**
-     * Zipper managing the true state.
-     * @type HTMLPurifier_Zipper
-     */
-    protected $zipper;
-
-    /**
-     * Current nesting of elements.
-     * @type array
-     */
-    protected $stack;
-
-    /**
-     * Injectors active in this stream processing.
-     * @type HTMLPurifier_Injector[]
-     */
-    protected $injectors;
-
-    /**
-     * Current instance of HTMLPurifier_Config.
-     * @type HTMLPurifier_Config
-     */
-    protected $config;
-
-    /**
-     * Current instance of HTMLPurifier_Context.
-     * @type HTMLPurifier_Context
-     */
-    protected $context;
-
-    /**
-     * @param HTMLPurifier_Token[] $tokens
-     * @param HTMLPurifier_Config $config
-     * @param HTMLPurifier_Context $context
-     * @return HTMLPurifier_Token[]
-     * @throws HTMLPurifier_Exception
-     */
-    public function execute($tokens, $config, $context)
-    {
-        $definition = $config->getHTMLDefinition();
-
-        // local variables
-        $generator = new HTMLPurifier_Generator($config, $context);
-        $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
-        // used for autoclose early abortion
-        $global_parent_allowed_elements = $definition->info_parent_def->child->getAllowedElements($config);
-        $e = $context->get('ErrorCollector', true);
-        $i = false; // injector index
-        list($zipper, $token) = HTMLPurifier_Zipper::fromArray($tokens);
-        if ($token === NULL) {
-            return array();
-        }
-        $reprocess = false; // whether or not to reprocess the same token
-        $stack = array();
-
-        // member variables
-        $this->stack =& $stack;
-        $this->tokens =& $tokens;
-        $this->token =& $token;
-        $this->zipper =& $zipper;
-        $this->config = $config;
-        $this->context = $context;
-
-        // context variables
-        $context->register('CurrentNesting', $stack);
-        $context->register('InputZipper', $zipper);
-        $context->register('CurrentToken', $token);
-
-        // -- begin INJECTOR --
-
-        $this->injectors = array();
-
-        $injectors = $config->getBatch('AutoFormat');
-        $def_injectors = $definition->info_injector;
-        $custom_injectors = $injectors['Custom'];
-        unset($injectors['Custom']); // special case
-        foreach ($injectors as $injector => $b) {
-            // XXX: Fix with a legitimate lookup table of enabled filters
-            if (strpos($injector, '.') !== false) {
-                continue;
-            }
-            $injector = "HTMLPurifier_Injector_$injector";
-            if (!$b) {
-                continue;
-            }
-            $this->injectors[] = new $injector;
-        }
-        foreach ($def_injectors as $injector) {
-            // assumed to be objects
-            $this->injectors[] = $injector;
-        }
-        foreach ($custom_injectors as $injector) {
-            if (!$injector) {
-                continue;
-            }
-            if (is_string($injector)) {
-                $injector = "HTMLPurifier_Injector_$injector";
-                $injector = new $injector;
-            }
-            $this->injectors[] = $injector;
-        }
-
-        // give the injectors references to the definition and context
-        // variables for performance reasons
-        foreach ($this->injectors as $ix => $injector) {
-            $error = $injector->prepare($config, $context);
-            if (!$error) {
-                continue;
-            }
-            array_splice($this->injectors, $ix, 1); // rm the injector
-            trigger_error("Cannot enable {$injector->name} injector because $error is not allowed", E_USER_WARNING);
-        }
-
-        // -- end INJECTOR --
-
-        // a note on reprocessing:
-        //      In order to reduce code duplication, whenever some code needs
-        //      to make HTML changes in order to make things "correct", the
-        //      new HTML gets sent through the purifier, regardless of its
-        //      status. This means that if we add a start token, because it
-        //      was totally necessary, we don't have to update nesting; we just
-        //      punt ($reprocess = true; continue;) and it does that for us.
-
-        // isset is in loop because $tokens size changes during loop exec
-        for (;;
-             // only increment if we don't need to reprocess
-             $reprocess ? $reprocess = false : $token = $zipper->next($token)) {
-
-            // check for a rewind
-            if (is_int($i)) {
-                // possibility: disable rewinding if the current token has a
-                // rewind set on it already. This would offer protection from
-                // infinite loop, but might hinder some advanced rewinding.
-                $rewind_offset = $this->injectors[$i]->getRewindOffset();
-                if (is_int($rewind_offset)) {
-                    for ($j = 0; $j < $rewind_offset; $j++) {
-                        if (empty($zipper->front)) break;
-                        $token = $zipper->prev($token);
-                        // indicate that other injectors should not process this token,
-                        // but we need to reprocess it
-                        unset($token->skip[$i]);
-                        $token->rewind = $i;
-                        if ($token instanceof HTMLPurifier_Token_Start) {
-                            array_pop($this->stack);
-                        } elseif ($token instanceof HTMLPurifier_Token_End) {
-                            $this->stack[] = $token->start;
-                        }
-                    }
-                }
-                $i = false;
-            }
-
-            // handle case of document end
-            if ($token === NULL) {
-                // kill processing if stack is empty
-                if (empty($this->stack)) {
-                    break;
-                }
-
-                // peek
-                $top_nesting = array_pop($this->stack);
-                $this->stack[] = $top_nesting;
-
-                // send error [TagClosedSuppress]
-                if ($e && !isset($top_nesting->armor['MakeWellFormed_TagClosedError'])) {
-                    $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by document end', $top_nesting);
-                }
-
-                // append, don't splice, since this is the end
-                $token = new HTMLPurifier_Token_End($top_nesting->name);
-
-                // punt!
-                $reprocess = true;
-                continue;
-            }
-
-            //echo '<br>'; printZipper($zipper, $token);//printTokens($this->stack);
-            //flush();
-
-            // quick-check: if it's not a tag, no need to process
-            if (empty($token->is_tag)) {
-                if ($token instanceof HTMLPurifier_Token_Text) {
-                    foreach ($this->injectors as $i => $injector) {
-                        if (isset($token->skip[$i])) {
-                            continue;
-                        }
-                        if ($token->rewind !== null && $token->rewind !== $i) {
-                            continue;
-                        }
-                        // XXX fuckup
-                        $r = $token;
-                        $injector->handleText($r);
-                        $token = $this->processToken($r, $i);
-                        $reprocess = true;
-                        break;
-                    }
-                }
-                // another possibility is a comment
-                continue;
-            }
-
-            if (isset($definition->info[$token->name])) {
-                $type = $definition->info[$token->name]->child->type;
-            } else {
-                $type = false; // Type is unknown, treat accordingly
-            }
-
-            // quick tag checks: anything that's *not* an end tag
-            $ok = false;
-            if ($type === 'empty' && $token instanceof HTMLPurifier_Token_Start) {
-                // claims to be a start tag but is empty
-                $token = new HTMLPurifier_Token_Empty(
-                    $token->name,
-                    $token->attr,
-                    $token->line,
-                    $token->col,
-                    $token->armor
-                );
-                $ok = true;
-            } elseif ($type && $type !== 'empty' && $token instanceof HTMLPurifier_Token_Empty) {
-                // claims to be empty but really is a start tag
-                // NB: this assignment is required
-                $old_token = $token;
-                $token = new HTMLPurifier_Token_End($token->name);
-                $token = $this->insertBefore(
-                    new HTMLPurifier_Token_Start($old_token->name, $old_token->attr, $old_token->line, $old_token->col, $old_token->armor)
-                );
-                // punt (since we had to modify the input stream in a non-trivial way)
-                $reprocess = true;
-                continue;
-            } elseif ($token instanceof HTMLPurifier_Token_Empty) {
-                // real empty token
-                $ok = true;
-            } elseif ($token instanceof HTMLPurifier_Token_Start) {
-                // start tag
-
-                // ...unless they also have to close their parent
-                if (!empty($this->stack)) {
-
-                    // Performance note: you might think that it's rather
-                    // inefficient, recalculating the autoclose information
-                    // for every tag that a token closes (since when we
-                    // do an autoclose, we push a new token into the
-                    // stream and then /process/ that, before
-                    // re-processing this token.)  But this is
-                    // necessary, because an injector can make an
-                    // arbitrary transformations to the autoclosing
-                    // tokens we introduce, so things may have changed
-                    // in the meantime.  Also, doing the inefficient thing is
-                    // "easy" to reason about (for certain perverse definitions
-                    // of "easy")
-
-                    $parent = array_pop($this->stack);
-                    $this->stack[] = $parent;
-
-                    $parent_def = null;
-                    $parent_elements = null;
-                    $autoclose = false;
-                    if (isset($definition->info[$parent->name])) {
-                        $parent_def = $definition->info[$parent->name];
-                        $parent_elements = $parent_def->child->getAllowedElements($config);
-                        $autoclose = !isset($parent_elements[$token->name]);
-                    }
-
-                    if ($autoclose && $definition->info[$token->name]->wrap) {
-                        // Check if an element can be wrapped by another
-                        // element to make it valid in a context (for
-                        // example, <ul><ul> needs a <li> in between)
-                        $wrapname = $definition->info[$token->name]->wrap;
-                        $wrapdef = $definition->info[$wrapname];
-                        $elements = $wrapdef->child->getAllowedElements($config);
-                        if (isset($elements[$token->name]) && isset($parent_elements[$wrapname])) {
-                            $newtoken = new HTMLPurifier_Token_Start($wrapname);
-                            $token = $this->insertBefore($newtoken);
-                            $reprocess = true;
-                            continue;
-                        }
-                    }
-
-                    $carryover = false;
-                    if ($autoclose && $parent_def->formatting) {
-                        $carryover = true;
-                    }
-
-                    if ($autoclose) {
-                        // check if this autoclose is doomed to fail
-                        // (this rechecks $parent, which his harmless)
-                        $autoclose_ok = isset($global_parent_allowed_elements[$token->name]);
-                        if (!$autoclose_ok) {
-                            foreach ($this->stack as $ancestor) {
-                                $elements = $definition->info[$ancestor->name]->child->getAllowedElements($config);
-                                if (isset($elements[$token->name])) {
-                                    $autoclose_ok = true;
-                                    break;
-                                }
-                                if ($definition->info[$token->name]->wrap) {
-                                    $wrapname = $definition->info[$token->name]->wrap;
-                                    $wrapdef = $definition->info[$wrapname];
-                                    $wrap_elements = $wrapdef->child->getAllowedElements($config);
-                                    if (isset($wrap_elements[$token->name]) && isset($elements[$wrapname])) {
-                                        $autoclose_ok = true;
-                                        break;
-                                    }
-                                }
-                            }
-                        }
-                        if ($autoclose_ok) {
-                            // errors need to be updated
-                            $new_token = new HTMLPurifier_Token_End($parent->name);
-                            $new_token->start = $parent;
-                            // [TagClosedSuppress]
-                            if ($e && !isset($parent->armor['MakeWellFormed_TagClosedError'])) {
-                                if (!$carryover) {
-                                    $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag auto closed', $parent);
-                                } else {
-                                    $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag carryover', $parent);
-                                }
-                            }
-                            if ($carryover) {
-                                $element = clone $parent;
-                                // [TagClosedAuto]
-                                $element->armor['MakeWellFormed_TagClosedError'] = true;
-                                $element->carryover = true;
-                                $token = $this->processToken(array($new_token, $token, $element));
-                            } else {
-                                $token = $this->insertBefore($new_token);
-                            }
-                        } else {
-                            $token = $this->remove();
-                        }
-                        $reprocess = true;
-                        continue;
-                    }
-
-                }
-                $ok = true;
-            }
-
-            if ($ok) {
-                foreach ($this->injectors as $i => $injector) {
-                    if (isset($token->skip[$i])) {
-                        continue;
-                    }
-                    if ($token->rewind !== null && $token->rewind !== $i) {
-                        continue;
-                    }
-                    $r = $token;
-                    $injector->handleElement($r);
-                    $token = $this->processToken($r, $i);
-                    $reprocess = true;
-                    break;
-                }
-                if (!$reprocess) {
-                    // ah, nothing interesting happened; do normal processing
-                    if ($token instanceof HTMLPurifier_Token_Start) {
-                        $this->stack[] = $token;
-                    } elseif ($token instanceof HTMLPurifier_Token_End) {
-                        throw new HTMLPurifier_Exception(
-                            'Improper handling of end tag in start code; possible error in MakeWellFormed'
-                        );
-                    }
-                }
-                continue;
-            }
-
-            // sanity check: we should be dealing with a closing tag
-            if (!$token instanceof HTMLPurifier_Token_End) {
-                throw new HTMLPurifier_Exception('Unaccounted for tag token in input stream, bug in HTML Purifier');
-            }
-
-            // make sure that we have something open
-            if (empty($this->stack)) {
-                if ($escape_invalid_tags) {
-                    if ($e) {
-                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
-                    }
-                    $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
-                } else {
-                    if ($e) {
-                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
-                    }
-                    $token = $this->remove();
-                }
-                $reprocess = true;
-                continue;
-            }
-
-            // first, check for the simplest case: everything closes neatly.
-            // Eventually, everything passes through here; if there are problems
-            // we modify the input stream accordingly and then punt, so that
-            // the tokens get processed again.
-            $current_parent = array_pop($this->stack);
-            if ($current_parent->name == $token->name) {
-                $token->start = $current_parent;
-                foreach ($this->injectors as $i => $injector) {
-                    if (isset($token->skip[$i])) {
-                        continue;
-                    }
-                    if ($token->rewind !== null && $token->rewind !== $i) {
-                        continue;
-                    }
-                    $r = $token;
-                    $injector->handleEnd($r);
-                    $token = $this->processToken($r, $i);
-                    $this->stack[] = $current_parent;
-                    $reprocess = true;
-                    break;
-                }
-                continue;
-            }
-
-            // okay, so we're trying to close the wrong tag
-
-            // undo the pop previous pop
-            $this->stack[] = $current_parent;
-
-            // scroll back the entire nest, trying to find our tag.
-            // (feature could be to specify how far you'd like to go)
-            $size = count($this->stack);
-            // -2 because -1 is the last element, but we already checked that
-            $skipped_tags = false;
-            for ($j = $size - 2; $j >= 0; $j--) {
-                if ($this->stack[$j]->name == $token->name) {
-                    $skipped_tags = array_slice($this->stack, $j);
-                    break;
-                }
-            }
-
-            // we didn't find the tag, so remove
-            if ($skipped_tags === false) {
-                if ($escape_invalid_tags) {
-                    if ($e) {
-                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag to text');
-                    }
-                    $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
-                } else {
-                    if ($e) {
-                        $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag removed');
-                    }
-                    $token = $this->remove();
-                }
-                $reprocess = true;
-                continue;
-            }
-
-            // do errors, in REVERSE $j order: a,b,c with </a></b></c>
-            $c = count($skipped_tags);
-            if ($e) {
-                for ($j = $c - 1; $j > 0; $j--) {
-                    // notice we exclude $j == 0, i.e. the current ending tag, from
-                    // the errors... [TagClosedSuppress]
-                    if (!isset($skipped_tags[$j]->armor['MakeWellFormed_TagClosedError'])) {
-                        $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by element end', $skipped_tags[$j]);
-                    }
-                }
-            }
-
-            // insert tags, in FORWARD $j order: c,b,a with </a></b></c>
-            $replace = array($token);
-            for ($j = 1; $j < $c; $j++) {
-                // ...as well as from the insertions
-                $new_token = new HTMLPurifier_Token_End($skipped_tags[$j]->name);
-                $new_token->start = $skipped_tags[$j];
-                array_unshift($replace, $new_token);
-                if (isset($definition->info[$new_token->name]) && $definition->info[$new_token->name]->formatting) {
-                    // [TagClosedAuto]
-                    $element = clone $skipped_tags[$j];
-                    $element->carryover = true;
-                    $element->armor['MakeWellFormed_TagClosedError'] = true;
-                    $replace[] = $element;
-                }
-            }
-            $token = $this->processToken($replace);
-            $reprocess = true;
-            continue;
-        }
-
-        $context->destroy('CurrentToken');
-        $context->destroy('CurrentNesting');
-        $context->destroy('InputZipper');
-
-        unset($this->injectors, $this->stack, $this->tokens);
-        return $zipper->toArray($token);
-    }
-
-    /**
-     * Processes arbitrary token values for complicated substitution patterns.
-     * In general:
-     *
-     * If $token is an array, it is a list of tokens to substitute for the
-     * current token. These tokens then get individually processed. If there
-     * is a leading integer in the list, that integer determines how many
-     * tokens from the stream should be removed.
-     *
-     * If $token is a regular token, it is swapped with the current token.
-     *
-     * If $token is false, the current token is deleted.
-     *
-     * If $token is an integer, that number of tokens (with the first token
-     * being the current one) will be deleted.
-     *
-     * @param HTMLPurifier_Token|array|int|bool $token Token substitution value
-     * @param HTMLPurifier_Injector|int $injector Injector that performed the substitution; default is if
-     *        this is not an injector related operation.
-     * @throws HTMLPurifier_Exception
-     */
-    protected function processToken($token, $injector = -1)
-    {
-        // normalize forms of token
-        if (is_object($token)) {
-            $token = array(1, $token);
-        }
-        if (is_int($token)) {
-            $token = array($token);
-        }
-        if ($token === false) {
-            $token = array(1);
-        }
-        if (!is_array($token)) {
-            throw new HTMLPurifier_Exception('Invalid token type from injector');
-        }
-        if (!is_int($token[0])) {
-            array_unshift($token, 1);
-        }
-        if ($token[0] === 0) {
-            throw new HTMLPurifier_Exception('Deleting zero tokens is not valid');
-        }
-
-        // $token is now an array with the following form:
-        // array(number nodes to delete, new node 1, new node 2, ...)
-
-        $delete = array_shift($token);
-        list($old, $r) = $this->zipper->splice($this->token, $delete, $token);
-
-        if ($injector > -1) {
-            // determine appropriate skips
-            $oldskip = isset($old[0]) ? $old[0]->skip : array();
-            foreach ($token as $object) {
-                $object->skip = $oldskip;
-                $object->skip[$injector] = true;
-            }
-        }
-
-        return $r;
-
-    }
-
-    /**
-     * Inserts a token before the current token. Cursor now points to
-     * this token.  You must reprocess after this.
-     * @param HTMLPurifier_Token $token
-     */
-    private function insertBefore($token)
-    {
-        // NB not $this->zipper->insertBefore(), due to positioning
-        // differences
-        $splice = $this->zipper->splice($this->token, 0, array($token));
-
-        return $splice[1];
-    }
-
-    /**
-     * Removes current token. Cursor now points to new token occupying previously
-     * occupied space.  You must reprocess after this.
-     */
-    private function remove()
-    {
-        return $this->zipper->delete();
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/RemoveForeignElements.php b/library/HTMLPurifier/Strategy/RemoveForeignElements.php
deleted file mode 100644
index 1a8149ecc..000000000
--- a/library/HTMLPurifier/Strategy/RemoveForeignElements.php
+++ /dev/null
@@ -1,207 +0,0 @@
-<?php
-
-/**
- * Removes all unrecognized tags from the list of tokens.
- *
- * This strategy iterates through all the tokens and removes unrecognized
- * tokens. If a token is not recognized but a TagTransform is defined for
- * that element, the element will be transformed accordingly.
- */
-
-class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
-{
-
-    /**
-     * @param HTMLPurifier_Token[] $tokens
-     * @param HTMLPurifier_Config $config
-     * @param HTMLPurifier_Context $context
-     * @return array|HTMLPurifier_Token[]
-     */
-    public function execute($tokens, $config, $context)
-    {
-        $definition = $config->getHTMLDefinition();
-        $generator = new HTMLPurifier_Generator($config, $context);
-        $result = array();
-
-        $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
-        $remove_invalid_img = $config->get('Core.RemoveInvalidImg');
-
-        // currently only used to determine if comments should be kept
-        $trusted = $config->get('HTML.Trusted');
-        $comment_lookup = $config->get('HTML.AllowedComments');
-        $comment_regexp = $config->get('HTML.AllowedCommentsRegexp');
-        $check_comments = $comment_lookup !== array() || $comment_regexp !== null;
-
-        $remove_script_contents = $config->get('Core.RemoveScriptContents');
-        $hidden_elements = $config->get('Core.HiddenElements');
-
-        // remove script contents compatibility
-        if ($remove_script_contents === true) {
-            $hidden_elements['script'] = true;
-        } elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
-            unset($hidden_elements['script']);
-        }
-
-        $attr_validator = new HTMLPurifier_AttrValidator();
-
-        // removes tokens until it reaches a closing tag with its value
-        $remove_until = false;
-
-        // converts comments into text tokens when this is equal to a tag name
-        $textify_comments = false;
-
-        $token = false;
-        $context->register('CurrentToken', $token);
-
-        $e = false;
-        if ($config->get('Core.CollectErrors')) {
-            $e =& $context->get('ErrorCollector');
-        }
-
-        foreach ($tokens as $token) {
-            if ($remove_until) {
-                if (empty($token->is_tag) || $token->name !== $remove_until) {
-                    continue;
-                }
-            }
-            if (!empty($token->is_tag)) {
-                // DEFINITION CALL
-
-                // before any processing, try to transform the element
-                if (isset($definition->info_tag_transform[$token->name])) {
-                    $original_name = $token->name;
-                    // there is a transformation for this tag
-                    // DEFINITION CALL
-                    $token = $definition->
-                        info_tag_transform[$token->name]->transform($token, $config, $context);
-                    if ($e) {
-                        $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
-                    }
-                }
-
-                if (isset($definition->info[$token->name])) {
-                    // mostly everything's good, but
-                    // we need to make sure required attributes are in order
-                    if (($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) &&
-                        $definition->info[$token->name]->required_attr &&
-                        ($token->name != 'img' || $remove_invalid_img) // ensure config option still works
-                    ) {
-                        $attr_validator->validateToken($token, $config, $context);
-                        $ok = true;
-                        foreach ($definition->info[$token->name]->required_attr as $name) {
-                            if (!isset($token->attr[$name])) {
-                                $ok = false;
-                                break;
-                            }
-                        }
-                        if (!$ok) {
-                            if ($e) {
-                                $e->send(
-                                    E_ERROR,
-                                    'Strategy_RemoveForeignElements: Missing required attribute',
-                                    $name
-                                );
-                            }
-                            continue;
-                        }
-                        $token->armor['ValidateAttributes'] = true;
-                    }
-
-                    if (isset($hidden_elements[$token->name]) && $token instanceof HTMLPurifier_Token_Start) {
-                        $textify_comments = $token->name;
-                    } elseif ($token->name === $textify_comments && $token instanceof HTMLPurifier_Token_End) {
-                        $textify_comments = false;
-                    }
-
-                } elseif ($escape_invalid_tags) {
-                    // invalid tag, generate HTML representation and insert in
-                    if ($e) {
-                        $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
-                    }
-                    $token = new HTMLPurifier_Token_Text(
-                        $generator->generateFromToken($token)
-                    );
-                } else {
-                    // check if we need to destroy all of the tag's children
-                    // CAN BE GENERICIZED
-                    if (isset($hidden_elements[$token->name])) {
-                        if ($token instanceof HTMLPurifier_Token_Start) {
-                            $remove_until = $token->name;
-                        } elseif ($token instanceof HTMLPurifier_Token_Empty) {
-                            // do nothing: we're still looking
-                        } else {
-                            $remove_until = false;
-                        }
-                        if ($e) {
-                            $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
-                        }
-                    } else {
-                        if ($e) {
-                            $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
-                        }
-                    }
-                    continue;
-                }
-            } elseif ($token instanceof HTMLPurifier_Token_Comment) {
-                // textify comments in script tags when they are allowed
-                if ($textify_comments !== false) {
-                    $data = $token->data;
-                    $token = new HTMLPurifier_Token_Text($data);
-                } elseif ($trusted || $check_comments) {
-                    // always cleanup comments
-                    $trailing_hyphen = false;
-                    if ($e) {
-                        // perform check whether or not there's a trailing hyphen
-                        if (substr($token->data, -1) == '-') {
-                            $trailing_hyphen = true;
-                        }
-                    }
-                    $token->data = rtrim($token->data, '-');
-                    $found_double_hyphen = false;
-                    while (strpos($token->data, '--') !== false) {
-                        $found_double_hyphen = true;
-                        $token->data = str_replace('--', '-', $token->data);
-                    }
-                    if ($trusted || !empty($comment_lookup[trim($token->data)]) ||
-                        ($comment_regexp !== null && preg_match($comment_regexp, trim($token->data)))) {
-                        // OK good
-                        if ($e) {
-                            if ($trailing_hyphen) {
-                                $e->send(
-                                    E_NOTICE,
-                                    'Strategy_RemoveForeignElements: Trailing hyphen in comment removed'
-                                );
-                            }
-                            if ($found_double_hyphen) {
-                                $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Hyphens in comment collapsed');
-                            }
-                        }
-                    } else {
-                        if ($e) {
-                            $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
-                        }
-                        continue;
-                    }
-                } else {
-                    // strip comments
-                    if ($e) {
-                        $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
-                    }
-                    continue;
-                }
-            } elseif ($token instanceof HTMLPurifier_Token_Text) {
-            } else {
-                continue;
-            }
-            $result[] = $token;
-        }
-        if ($remove_until && $e) {
-            // we removed tokens until the end, throw error
-            $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Token removed to end', $remove_until);
-        }
-        $context->destroy('CurrentToken');
-        return $result;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/library/HTMLPurifier/Strategy/ValidateAttributes.php b/library/HTMLPurifier/Strategy/ValidateAttributes.php
deleted file mode 100644
index fbb3d27c8..000000000
--- a/library/HTMLPurifier/Strategy/ValidateAttributes.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-/**
- * Validate all attributes in the tokens.
- */
-
-class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
-{
-
-    /**
-     * @param HTMLPurifier_Token[] $tokens
-     * @param HTMLPurifier_Config $config
-     * @param HTMLPurifier_Context $context
-     * @return HTMLPurifier_Token[]
-     */
-    public function execute($tokens, $config, $context)
-    {
-        // setup validator
-        $validator = new HTMLPurifier_AttrValidator();
-
-        $token = false;
-        $context->register('CurrentToken', $token);
-
-        foreach ($tokens as $key => $token) {
-
-            // only process tokens that have attributes,
-            //   namely start and empty tags
-            if (!$token instanceof HTMLPurifier_Token_Start && !$token instanceof HTMLPurifier_Token_Empty) {
-                continue;
-            }
-
-            // skip tokens that are armored
-            if (!empty($token->armor['ValidateAttributes'])) {
-                continue;
-            }
-
-            // note that we have no facilities here for removing tokens
-            $validator->validateToken($token, $config, $context);
-        }
-        $context->destroy('CurrentToken');
-        return $tokens;
-    }
-}
-
-// vim: et sw=4 sts=4