mirror of
https://github.com/ezyang/htmlpurifier.git
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e99520ab96
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1253 48356398-32a2-884e-a903-53898d9a118a
209 lines
7.3 KiB
PHP
209 lines
7.3 KiB
PHP
<?php
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HTMLPurifier_ConfigSchema::define(
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'Output', 'CommentScriptContents', true, 'bool',
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'Determines whether or not HTML Purifier should attempt to fix up '.
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'the contents of script tags for legacy browsers with comments. This '.
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'directive was available since 2.0.0.'
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);
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HTMLPurifier_ConfigSchema::defineAlias('Core', 'CommentScriptContents', 'Output', 'CommentScriptContents');
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// extension constraints could be factored into ConfigSchema
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HTMLPurifier_ConfigSchema::define(
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'Output', 'TidyFormat', false, 'bool', <<<HTML
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<p>
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Determines whether or not to run Tidy on the final output for pretty
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formatting reasons, such as indentation and wrap.
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</p>
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<p>
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This can greatly improve readability for editors who are hand-editing
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the HTML, but is by no means necessary as HTML Purifier has already
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fixed all major errors the HTML may have had. Tidy is a non-default
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extension, and this directive will silently fail if Tidy is not
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available.
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</p>
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<p>
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If you are looking to make the overall look of your page's source
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better, I recommend running Tidy on the entire page rather than just
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user-content (after all, the indentation relative to the containing
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blocks will be incorrect).
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</p>
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<p>
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This directive was available since 1.1.1.
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</p>
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HTML
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);
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HTMLPurifier_ConfigSchema::defineAlias('Core', 'TidyFormat', 'Output', 'TidyFormat');
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HTMLPurifier_ConfigSchema::define('Output', 'Newline', null, 'string/null', '
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<p>
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Newline string to format final output with. If left null, HTML Purifier
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will auto-detect the default newline type of the system and use that;
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you can manually override it here. Remember, \r\n is Windows, \r
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is Mac, and \n is Unix. This directive was available since 2.0.1.
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</p>
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');
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/**
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* Generates HTML from tokens.
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* @todo Refactor interface so that configuration/context is determined
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* upon instantiation, no need for messy generateFromTokens() calls
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*/
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class HTMLPurifier_Generator
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{
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/**
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* Bool cache of %HTML.XHTML
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* @private
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*/
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var $_xhtml = true;
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/**
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* Bool cache of %Output.CommentScriptContents
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* @private
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*/
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var $_scriptFix = false;
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/**
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* Cache of HTMLDefinition
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* @private
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*/
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var $_def;
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/**
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* Generates HTML from an array of tokens.
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* @param $tokens Array of HTMLPurifier_Token
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* @param $config HTMLPurifier_Config object
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* @return Generated HTML
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*/
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function generateFromTokens($tokens, $config, &$context) {
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$html = '';
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if (!$config) $config = HTMLPurifier_Config::createDefault();
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$this->_scriptFix = $config->get('Output', 'CommentScriptContents');
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$this->_def = $config->getHTMLDefinition();
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$this->_xhtml = $this->_def->doctype->xml;
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if (!$tokens) return '';
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for ($i = 0, $size = count($tokens); $i < $size; $i++) {
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if ($this->_scriptFix && $tokens[$i]->name === 'script'
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&& $i + 2 < $size && $tokens[$i+2]->type == 'end') {
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// script special case
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// the contents of the script block must be ONE token
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// for this to work
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$html .= $this->generateFromToken($tokens[$i++]);
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$html .= $this->generateScriptFromToken($tokens[$i++]);
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// We're not going to do this: it wouldn't be valid anyway
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//while ($tokens[$i]->name != 'script') {
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// $html .= $this->generateScriptFromToken($tokens[$i++]);
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//}
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}
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$html .= $this->generateFromToken($tokens[$i]);
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}
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if ($config->get('Output', 'TidyFormat') && extension_loaded('tidy')) {
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$tidy_options = array(
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'indent'=> true,
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'output-xhtml' => $this->_xhtml,
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'show-body-only' => true,
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'indent-spaces' => 2,
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'wrap' => 68,
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);
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if (version_compare(PHP_VERSION, '5', '<')) {
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tidy_set_encoding('utf8');
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foreach ($tidy_options as $key => $value) {
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tidy_setopt($key, $value);
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}
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tidy_parse_string($html);
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tidy_clean_repair();
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$html = tidy_get_output();
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} else {
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$tidy = new Tidy;
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$tidy->parseString($html, $tidy_options, 'utf8');
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$tidy->cleanRepair();
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$html = (string) $tidy;
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}
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}
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// normalize newlines to system
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$nl = $config->get('Output', 'Newline');
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if ($nl === null) $nl = PHP_EOL;
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$html = str_replace("\n", $nl, $html);
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return $html;
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}
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/**
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* Generates HTML from a single token.
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* @param $token HTMLPurifier_Token object.
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* @return Generated HTML
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*/
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function generateFromToken($token) {
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if (!isset($token->type)) return '';
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if ($token->type == 'start') {
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$attr = $this->generateAttributes($token->attr, $token->name);
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return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
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} elseif ($token->type == 'end') {
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return '</' . $token->name . '>';
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} elseif ($token->type == 'empty') {
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$attr = $this->generateAttributes($token->attr, $token->name);
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return '<' . $token->name . ($attr ? ' ' : '') . $attr .
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( $this->_xhtml ? ' /': '' )
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. '>';
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} elseif ($token->type == 'text') {
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return $this->escape($token->data);
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} else {
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return '';
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}
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}
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/**
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* Special case processor for the contents of script tags
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* @warning This runs into problems if there's already a literal
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* --> somewhere inside the script contents.
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*/
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function generateScriptFromToken($token) {
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if ($token->type != 'text') return $this->generateFromToken($token);
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// return '<!--' . "\n" . trim($token->data) . "\n" . '// -->';
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// more advanced version:
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// thanks <http://lachy.id.au/log/2005/05/script-comments>
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$data = preg_replace('#//\s*$#', '', $token->data);
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return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
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}
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/**
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* Generates attribute declarations from attribute array.
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* @param $assoc_array_of_attributes Attribute array
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* @return Generate HTML fragment for insertion.
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*/
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function generateAttributes($assoc_array_of_attributes, $element) {
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$html = '';
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foreach ($assoc_array_of_attributes as $key => $value) {
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if (!$this->_xhtml) {
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// remove namespaced attributes
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if (strpos($key, ':') !== false) continue;
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if (!empty($this->_def->info[$element]->attr[$key]->minimized)) {
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$html .= $key . ' ';
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continue;
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}
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}
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$html .= $key.'="'.$this->escape($value).'" ';
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}
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return rtrim($html);
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}
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/**
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* Escapes raw text data.
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* @param $string String data to escape for HTML.
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* @return String escaped data.
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*/
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function escape($string) {
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return htmlspecialchars($string, ENT_COMPAT, 'UTF-8');
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}
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}
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