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-rw-r--r--lib/htmlpurifier/library/HTMLPurifier/Generator.php254
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diff --git a/lib/htmlpurifier/library/HTMLPurifier/Generator.php b/lib/htmlpurifier/library/HTMLPurifier/Generator.php
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+<?php
+
+/**
+ * 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
+{
+
+ /**
+ * Whether or not generator should produce XML output
+ */
+ private $_xhtml = true;
+
+ /**
+ * :HACK: Whether or not generator should comment the insides of <script> tags
+ */
+ private $_scriptFix = false;
+
+ /**
+ * Cache of HTMLDefinition during HTML output to determine whether or
+ * not attributes should be minimized.
+ */
+ private $_def;
+
+ /**
+ * Cache of %Output.SortAttr
+ */
+ private $_sortAttr;
+
+ /**
+ * Cache of %Output.FlashCompat
+ */
+ private $_flashCompat;
+
+ /**
+ * Cache of %Output.FixInnerHTML
+ */
+ private $_innerHTMLFix;
+
+ /**
+ * Stack for keeping track of object information when outputting IE
+ * compatibility code.
+ */
+ private $_flashStack = array();
+
+ /**
+ * Configuration for the generator
+ */
+ protected $config;
+
+ /**
+ * @param $config Instance of HTMLPurifier_Config
+ * @param $context Instance of HTMLPurifier_Context
+ */
+ public function __construct($config, $context) {
+ $this->config = $config;
+ $this->_scriptFix = $config->get('Output.CommentScriptContents');
+ $this->_innerHTMLFix = $config->get('Output.FixInnerHTML');
+ $this->_sortAttr = $config->get('Output.SortAttr');
+ $this->_flashCompat = $config->get('Output.FlashCompat');
+ $this->_def = $config->getHTMLDefinition();
+ $this->_xhtml = $this->_def->doctype->xml;
+ }
+
+ /**
+ * 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) {
+ if (!$tokens) return '';
+
+ // Basic algorithm
+ $html = '';
+ for ($i = 0, $size = count($tokens); $i < $size; $i++) {
+ if ($this->_scriptFix && $tokens[$i]->name === 'script'
+ && $i + 2 < $size && $tokens[$i+2] instanceof HTMLPurifier_Token_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++]);
+ }
+ $html .= $this->generateFromToken($tokens[$i]);
+ }
+
+ // Tidy cleanup
+ if (extension_loaded('tidy') && $this->config->get('Output.TidyFormat')) {
+ $tidy = new Tidy;
+ $tidy->parseString($html, array(
+ 'indent'=> true,
+ 'output-xhtml' => $this->_xhtml,
+ 'show-body-only' => true,
+ 'indent-spaces' => 2,
+ 'wrap' => 68,
+ ), 'utf8');
+ $tidy->cleanRepair();
+ $html = (string) $tidy; // explicit cast necessary
+ }
+
+ // Normalize newlines to system defined value
+ if ($this->config->get('Core.NormalizeNewlines')) {
+ $nl = $this->config->get('Output.Newline');
+ if ($nl === null) $nl = PHP_EOL;
+ if ($nl !== "\n") $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 (!$token instanceof HTMLPurifier_Token) {
+ trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
+ return '';
+
+ } elseif ($token instanceof HTMLPurifier_Token_Start) {
+ $attr = $this->generateAttributes($token->attr, $token->name);
+ if ($this->_flashCompat) {
+ if ($token->name == "object") {
+ $flash = new stdclass();
+ $flash->attr = $token->attr;
+ $flash->param = array();
+ $this->_flashStack[] = $flash;
+ }
+ }
+ return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
+
+ } elseif ($token instanceof HTMLPurifier_Token_End) {
+ $_extra = '';
+ if ($this->_flashCompat) {
+ if ($token->name == "object" && !empty($this->_flashStack)) {
+ // doesn't do anything for now
+ }
+ }
+ return $_extra . '</' . $token->name . '>';
+
+ } elseif ($token instanceof HTMLPurifier_Token_Empty) {
+ if ($this->_flashCompat && $token->name == "param" && !empty($this->_flashStack)) {
+ $this->_flashStack[count($this->_flashStack)-1]->param[$token->attr['name']] = $token->attr['value'];
+ }
+ $attr = $this->generateAttributes($token->attr, $token->name);
+ return '<' . $token->name . ($attr ? ' ' : '') . $attr .
+ ( $this->_xhtml ? ' /': '' ) // <br /> v. <br>
+ . '>';
+
+ } elseif ($token instanceof HTMLPurifier_Token_Text) {
+ return $this->escape($token->data, ENT_NOQUOTES);
+
+ } elseif ($token instanceof HTMLPurifier_Token_Comment) {
+ return '<!--' . $token->data . '-->';
+ } else {
+ return '';
+
+ }
+ }
+
+ /**
+ * Special case processor for the contents of script tags
+ * @warning This runs into problems if there's already a literal
+ * --> somewhere inside the script contents.
+ */
+ public function generateScriptFromToken($token) {
+ if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
+ // 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.
+ * @note This does not include the leading or trailing space.
+ * @param $assoc_array_of_attributes Attribute array
+ * @param $element Name of element attributes are for, used to check
+ * attribute minimization.
+ * @return Generate HTML fragment for insertion.
+ */
+ public function generateAttributes($assoc_array_of_attributes, $element = false) {
+ $html = '';
+ if ($this->_sortAttr) ksort($assoc_array_of_attributes);
+ foreach ($assoc_array_of_attributes as $key => $value) {
+ if (!$this->_xhtml) {
+ // Remove namespaced attributes
+ if (strpos($key, ':') !== false) continue;
+ // Check if we should minimize the attribute: val="val" -> val
+ if ($element && !empty($this->_def->info[$element]->attr[$key]->minimized)) {
+ $html .= $key . ' ';
+ continue;
+ }
+ }
+ // Workaround for Internet Explorer innerHTML bug.
+ // Essentially, Internet Explorer, when calculating
+ // innerHTML, omits quotes if there are no instances of
+ // angled brackets, quotes or spaces. However, when parsing
+ // HTML (for example, when you assign to innerHTML), it
+ // treats backticks as quotes. Thus,
+ // <img alt="``" />
+ // becomes
+ // <img alt=`` />
+ // becomes
+ // <img alt='' />
+ // Fortunately, all we need to do is trigger an appropriate
+ // quoting style, which we do by adding an extra space.
+ // This also is consistent with the W3C spec, which states
+ // that user agents may ignore leading or trailing
+ // whitespace (in fact, most don't, at least for attributes
+ // like alt, but an extra space at the end is barely
+ // noticeable). Still, we have a configuration knob for
+ // this, since this transformation is not necesary if you
+ // don't process user input with innerHTML or you don't plan
+ // on supporting Internet Explorer.
+ if ($this->_innerHTMLFix) {
+ if (strpos($value, '`') !== false) {
+ // check if correct quoting style would not already be
+ // triggered
+ if (strcspn($value, '"\' <>') === strlen($value)) {
+ // protect!
+ $value .= ' ';
+ }
+ }
+ }
+ $html .= $key.'="'.$this->escape($value).'" ';
+ }
+ return rtrim($html);
+ }
+
+ /**
+ * Escapes raw text data.
+ * @todo This really ought to be protected, but until we have a facility
+ * for properly generating HTML here w/o using tokens, it stays
+ * public.
+ * @param $string String data to escape for HTML.
+ * @param $quote Quoting style, like htmlspecialchars. ENT_NOQUOTES is
+ * permissible for non-attribute output.
+ * @return String escaped data.
+ */
+ public function escape($string, $quote = null) {
+ // Workaround for APC bug on Mac Leopard reported by sidepodcast
+ // http://htmlpurifier.org/phorum/read.php?3,4823,4846
+ if ($quote === null) $quote = ENT_COMPAT;
+ return htmlspecialchars($string, $quote, 'UTF-8');
+ }
+
+}
+
+// vim: et sw=4 sts=4
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 19:07:10 +0000