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! $reprocess = true; continue; } //echo '
'; printZipper($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,