This directive will cause HTML Purifier to automatically paragraph text in the document fragment root based on two newlines and block tags. This directive has been available since 2.0.1.

' ); /** * Takes tokens makes them well-formed (balance end tags, etc.) */ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy { function execute($tokens, $config, &$context) { $definition = $config->getHTMLDefinition(); $generator = new HTMLPurifier_Generator(); $current_nesting = array(); $context->register('CurrentNesting', $current_nesting); $tokens_index = null; $context->register('InputIndex', $tokens_index); $context->register('InputTokens', $tokens); $result = array(); $context->register('OutputTokens', $result); $escape_invalid_tags = $config->get('Core', 'EscapeInvalidTags'); $auto_paragraph = $config->get('Core', 'AutoParagraph'); $auto_paragraph_skip = 0; $auto_paragraph_disabled = false; $context->register('AutoParagraphSkip', $auto_paragraph_skip); $injector = new HTMLPurifier_Injector_AutoParagraph(); for ($tokens_index = 0; isset($tokens[$tokens_index]); $tokens_index++) { // if all goes well, this token will be passed through unharmed $token = $tokens[$tokens_index]; // this will be more complicated if ($auto_paragraph_skip > 0) { $auto_paragraph_skip--; $auto_paragraph_disabled = true; } else { $auto_paragraph_disabled = false; } // quick-check: if it's not a tag, no need to process if (empty( $token->is_tag )) { if ($token->type === 'text') { if ($auto_paragraph && !$auto_paragraph_disabled) { $injector->handleText($token, $config, $context); } } $this->processToken($token, $config, $context); continue; } $info = $definition->info[$token->name]->child; // test if it claims to be a start tag but is empty if ($info->type == 'empty' && $token->type == 'start') { $result[] = new HTMLPurifier_Token_Empty($token->name, $token->attr); continue; } // test if it claims to be empty but really is a start tag if ($info->type != 'empty' && $token->type == 'empty' ) { $result[] = new HTMLPurifier_Token_Start($token->name, $token->attr); $result[] = new HTMLPurifier_Token_End($token->name); continue; } // automatically insert empty tags if ($token->type == 'empty') { $result[] = $token; continue; } // start tags have precedence, so they get passed through... if ($token->type == 'start') { // ...unless they also have to close their parent if (!empty($current_nesting)) { $parent = array_pop($current_nesting); $parent_info = $definition->info[$parent->name]; // this can be replaced with a more general algorithm: // if the token is not allowed by the parent, auto-close // the parent if (!isset($parent_info->child->elements[$token->name])) { // close the parent, then append the token $result[] = new HTMLPurifier_Token_End($parent->name); $result[] = $token; $current_nesting[] = $token; continue; } $current_nesting[] = $parent; // undo the pop } if ($auto_paragraph && !$auto_paragraph_disabled) { $injector->handleStart($token, $config, $context); } $this->processToken($token, $config, $context); continue; } // sanity check: we should be dealing with a closing tag if ($token->type != 'end') continue; // make sure that we have something open if (empty($current_nesting)) { if ($escape_invalid_tags) { $result[] = new HTMLPurifier_Token_Text( $generator->generateFromToken($token, $config, $context) ); } continue; } // first, check for the simplest case: everything closes neatly $current_parent = array_pop($current_nesting); if ($current_parent->name == $token->name) { $result[] = $token; continue; } // okay, so we're trying to close the wrong tag // undo the pop previous pop $current_nesting[] = $current_parent; // scroll back the entire nest, trying to find our tag. // (feature could be to specify how far you'd like to go) $size = count($current_nesting); // -2 because -1 is the last element, but we already checked that $skipped_tags = false; for ($i = $size - 2; $i >= 0; $i--) { if ($current_nesting[$i]->name == $token->name) { // current nesting is modified $skipped_tags = array_splice($current_nesting, $i); break; } } // we still didn't find the tag, so remove if ($skipped_tags === false) { if ($escape_invalid_tags) { $result[] = new HTMLPurifier_Token_Text( $generator->generateFromToken($token, $config, $context) ); } continue; } // okay, we found it, close all the skipped tags // note that skipped tags contains the element we need closed $size = count($skipped_tags); for ($i = $size - 1; $i >= 0; $i--) { $result[] = new HTMLPurifier_Token_End($skipped_tags[$i]->name); } } // we're at the end now, fix all still unclosed tags // not using processToken() because at this point we don't // care about current nesting if (!empty($current_nesting)) { $size = count($current_nesting); for ($i = $size - 1; $i >= 0; $i--) { $result[] = new HTMLPurifier_Token_End($current_nesting[$i]->name); } } $context->destroy('CurrentNesting'); $context->destroy('InputTokens'); $context->destroy('InputIndex'); $context->destroy('OutputTokens'); return $result; } function processToken($token, $config, &$context) { if (is_array($token)) { // the original token was overloaded by a formatter, time // to some fancy acrobatics $tokens =& $context->get('InputTokens'); $tokens_index =& $context->get('InputIndex'); // $tokens_index is decremented so that the entire set gets // re-processed array_splice($tokens, $tokens_index--, 1, $token); // this will be a bit more complicated when we add more formatters // we need to prevent the same formatter from running twice on it $auto_paragraph_skip =& $context->get('AutoParagraphSkip'); $auto_paragraph_skip = count($token); } elseif ($token) { // regular case $result =& $context->get('OutputTokens'); $current_nesting =& $context->get('CurrentNesting'); $result[] = $token; if ($token->type == 'start') { $current_nesting[] = $token; } elseif ($token->type == 'end') { // theoretical: this isn't used because performing // the calculations inline is more efficient, and // end tokens currently do not cause a handler invocation array_pop($current_nesting); } } } } ?>