From a0052f0176bd079e6a94baec59fea2ec5a8d651e Mon Sep 17 00:00:00 2001
From: friendica <info@friendica.com>
Date: Thu, 1 Jan 2015 22:18:27 -0800
Subject: htmlpurifier update - compatibility issue with language library
 autoloader

---
 library/HTMLPurifier/Generator.php | 164 +++++++++++++++++++++++++------------
 1 file changed, 113 insertions(+), 51 deletions(-)

(limited to 'library/HTMLPurifier/Generator.php')

diff --git a/library/HTMLPurifier/Generator.php b/library/HTMLPurifier/Generator.php
index 4a6241727..6fb568714 100644
--- a/library/HTMLPurifier/Generator.php
+++ b/library/HTMLPurifier/Generator.php
@@ -11,49 +11,64 @@ class HTMLPurifier_Generator
 {
 
     /**
-     * Whether or not generator should produce XML output
+     * Whether or not generator should produce XML output.
+     * @type bool
      */
     private $_xhtml = true;
 
     /**
-     * :HACK: Whether or not generator should comment the insides of <script> tags
+     * :HACK: Whether or not generator should comment the insides of <script> tags.
+     * @type bool
      */
     private $_scriptFix = false;
 
     /**
      * Cache of HTMLDefinition during HTML output to determine whether or
      * not attributes should be minimized.
+     * @type HTMLPurifier_HTMLDefinition
      */
     private $_def;
 
     /**
-     * Cache of %Output.SortAttr
+     * Cache of %Output.SortAttr.
+     * @type bool
      */
     private $_sortAttr;
 
     /**
-     * Cache of %Output.FlashCompat
+     * Cache of %Output.FlashCompat.
+     * @type bool
      */
     private $_flashCompat;
 
+    /**
+     * Cache of %Output.FixInnerHTML.
+     * @type bool
+     */
+    private $_innerHTMLFix;
+
     /**
      * Stack for keeping track of object information when outputting IE
      * compatibility code.
+     * @type array
      */
     private $_flashStack = array();
 
     /**
      * Configuration for the generator
+     * @type HTMLPurifier_Config
      */
     protected $config;
 
     /**
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
      */
-    public function __construct($config, $context) {
+    public function __construct($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();
@@ -62,12 +77,14 @@ class HTMLPurifier_Generator
 
     /**
      * Generates HTML from an array of tokens.
-     * @param $tokens Array of HTMLPurifier_Token
-     * @param $config HTMLPurifier_Config object
-     * @return Generated HTML
+     * @param HTMLPurifier_Token[] $tokens Array of HTMLPurifier_Token
+     * @return string Generated HTML
      */
-    public function generateFromTokens($tokens) {
-        if (!$tokens) return '';
+    public function generateFromTokens($tokens)
+    {
+        if (!$tokens) {
+            return '';
+        }
 
         // Basic algorithm
         $html = '';
@@ -86,30 +103,41 @@ class HTMLPurifier_Generator
         // 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->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
-        $nl = $this->config->get('Output.Newline');
-        if ($nl === null) $nl = PHP_EOL;
-        if ($nl !== "\n") $html = str_replace("\n", $nl, $html);
+        if ($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
+     * @param HTMLPurifier_Token $token HTMLPurifier_Token object.
+     * @return string Generated HTML
      */
-    public function generateFromToken($token) {
+    public function generateFromToken($token)
+    {
         if (!$token instanceof HTMLPurifier_Token) {
             trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
             return '';
@@ -130,19 +158,7 @@ class HTMLPurifier_Generator
             $_extra = '';
             if ($this->_flashCompat) {
                 if ($token->name == "object" && !empty($this->_flashStack)) {
-                    $flash = array_pop($this->_flashStack);
-                    $compat_token = new HTMLPurifier_Token_Empty("embed");
-                    foreach ($flash->attr as $name => $val) {
-                        if ($name == "classid") continue;
-                        if ($name == "type") continue;
-                        if ($name == "data") $name = "src";
-                        $compat_token->attr[$name] = $val;
-                    }
-                    foreach ($flash->param as $name => $val) {
-                        if ($name == "movie") $name = "src";
-                        $compat_token->attr[$name] = $val;
-                    }
-                    $_extra = "<!--[if IE]>".$this->generateFromToken($compat_token)."<![endif]-->";
+                    // doesn't do anything for now
                 }
             }
             return $_extra . '</' . $token->name . '>';
@@ -169,11 +185,16 @@ class HTMLPurifier_Generator
 
     /**
      * Special case processor for the contents of script tags
+     * @param HTMLPurifier_Token $token HTMLPurifier_Token object.
+     * @return string
      * @warning This runs into problems if there's already a literal
      *          --> somewhere inside the script contents.
      */
-    public function generateScriptFromToken($token) {
-        if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
+    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" . '//--><!]]>';
@@ -182,24 +203,60 @@ class HTMLPurifier_Generator
     /**
      * 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
+     * @param array $assoc_array_of_attributes Attribute array
+     * @param string $element Name of element attributes are for, used to check
      *        attribute minimization.
-     * @return Generate HTML fragment for insertion.
+     * @return string Generated HTML fragment for insertion.
      */
-    public function generateAttributes($assoc_array_of_attributes, $element = false) {
+    public function generateAttributes($assoc_array_of_attributes, $element = '')
+    {
         $html = '';
-        if ($this->_sortAttr) ksort($assoc_array_of_attributes);
+        if ($this->_sortAttr) {
+            ksort($assoc_array_of_attributes);
+        }
         foreach ($assoc_array_of_attributes as $key => $value) {
             if (!$this->_xhtml) {
                 // Remove namespaced attributes
-                if (strpos($key, ':') !== false) continue;
+                if (strpos($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);
@@ -210,15 +267,20 @@ class HTMLPurifier_Generator
      * @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
+     * @param string $string String data to escape for HTML.
+     * @param int $quote Quoting style, like htmlspecialchars. ENT_NOQUOTES is
      *               permissible for non-attribute output.
-     * @return String escaped data.
+     * @return string escaped data.
      */
-    public function escape($string, $quote = ENT_COMPAT) {
+    public function escape($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');
     }
-
 }
 
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-- 
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