From ed1d212ae2daea5e4bd043417610177093e99f19 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Sat, 16 Jan 2016 03:03:51 -0500
Subject: [PATCH] Improved SVG cleanup code

---
 program/lib/Roundcube/html.php |  115 +++++++++++++++++++++++++++++++++++++++++----------------
 1 files changed, 82 insertions(+), 33 deletions(-)

diff --git a/program/lib/Roundcube/html.php b/program/lib/Roundcube/html.php
index a367112..5fb066d 100644
--- a/program/lib/Roundcube/html.php
+++ b/program/lib/Roundcube/html.php
@@ -1,9 +1,9 @@
 <?php
 
-/*
+/**
  +-----------------------------------------------------------------------+
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2011, The Roundcube Dev Team                       |
+ | Copyright (C) 2005-2013, The Roundcube Dev Team                       |
  |                                                                       |
  | Licensed under the GNU General Public License version 3 or            |
  | any later version with exceptions for skins & plugins.                |
@@ -16,7 +16,6 @@
  +-----------------------------------------------------------------------+
 */
 
-
 /**
  * Class for HTML code creation
  *
@@ -26,14 +25,14 @@
 class html
 {
     protected $tagname;
-    protected $attrib = array();
+    protected $attrib  = array();
     protected $allowed = array();
     protected $content;
 
     public static $doctype = 'xhtml';
     public static $lc_tags = true;
-    public static $common_attrib = array('id','class','style','title','align');
-    public static $containers = array('iframe','div','span','p','h1','h2','h3','form','textarea','table','thead','tbody','tr','th','td','style','script');
+    public static $common_attrib = array('id','class','style','title','align','unselectable','tabindex','role');
+    public static $containers = array('iframe','div','span','p','h1','h2','h3','ul','form','textarea','table','thead','tbody','tr','th','td','style','script');
 
 
     /**
@@ -66,13 +65,15 @@
      * @param string $tagname Tag name
      * @param array  $attrib  Tag attributes as key/value pairs
      * @param string $content Optinal Tag content (creates a container tag)
-     * @param array  $allowed_attrib List with allowed attributes, omit to allow all
+     * @param array  $allowed List with allowed attributes, omit to allow all
+     *
      * @return string The XHTML tag
      */
-    public static function tag($tagname, $attrib = array(), $content = null, $allowed_attrib = null)
+    public static function tag($tagname, $attrib = array(), $content = null, $allowed = null)
     {
-        if (is_string($attrib))
+        if (is_string($attrib)) {
             $attrib = array('class' => $attrib);
+        }
 
         $inline_tags = array('a','span','img');
         $suffix = $attrib['nl'] || ($content && $attrib['nl'] !== false && !in_array($tagname, $inline_tags)) ? "\n" : '';
@@ -81,15 +82,17 @@
         if (isset($content) || in_array($tagname, self::$containers)) {
             $suffix = $attrib['noclose'] ? $suffix : '</' . $tagname . '>' . $suffix;
             unset($attrib['noclose'], $attrib['nl']);
-            return '<' . $tagname  . self::attrib_string($attrib, $allowed_attrib) . '>' . $content . $suffix;
+            return '<' . $tagname  . self::attrib_string($attrib, $allowed) . '>' . $content . $suffix;
         }
         else {
-            return '<' . $tagname  . self::attrib_string($attrib, $allowed_attrib) . '>' . $suffix;
+            return '<' . $tagname  . self::attrib_string($attrib, $allowed) . '>' . $suffix;
         }
     }
 
     /**
+     * Return DOCTYPE tag of specified type
      *
+     * @param string $type Document type (html5, xhtml, 'xhtml-trans, xhtml-strict)
      */
     public static function doctype($type)
     {
@@ -113,6 +116,7 @@
      *
      * @param mixed  $attr Hash array with tag attributes or string with class name
      * @param string $cont Div content
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -121,6 +125,7 @@
         if (is_string($attr)) {
             $attr = array('class' => $attr);
         }
+
         return self::tag('div', $attr, $cont, array_merge(self::$common_attrib, array('onclick')));
     }
 
@@ -129,6 +134,7 @@
      *
      * @param mixed  $attr Hash array with tag attributes or string with class name
      * @param string $cont Paragraph content
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -137,6 +143,7 @@
         if (is_string($attr)) {
             $attr = array('class' => $attr);
         }
+
         return self::tag('p', $attr, $cont, self::$common_attrib);
     }
 
@@ -144,6 +151,7 @@
      * Derrived method to create <img />
      *
      * @param mixed $attr Hash array with tag attributes or string with image source (src)
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -152,8 +160,9 @@
         if (is_string($attr)) {
             $attr = array('src' => $attr);
         }
+
         return self::tag('img', $attr + array('alt' => ''), null, array_merge(self::$common_attrib,
-            array('src','alt','width','height','border','usemap','onclick')));
+            array('src','alt','width','height','border','usemap','onclick','onerror')));
     }
 
     /**
@@ -161,6 +170,7 @@
      *
      * @param mixed  $attr Hash array with tag attributes or string with link location (href)
      * @param string $cont Link content
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -169,6 +179,7 @@
         if (is_string($attr)) {
             $attr = array('href' => $attr);
         }
+
         return self::tag('a', $attr, $cont, array_merge(self::$common_attrib,
             array('href','target','name','rel','onclick','onmouseover','onmouseout','onmousedown','onmouseup')));
     }
@@ -178,6 +189,7 @@
      *
      * @param mixed  $attr Hash array with tag attributes or string with class name
      * @param string $cont Tag content
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -186,6 +198,7 @@
         if (is_string($attr)) {
             $attr = array('class' => $attr);
         }
+
         return self::tag('span', $attr, $cont, self::$common_attrib);
     }
 
@@ -194,6 +207,7 @@
      *
      * @param mixed  $attr Hash array with tag attributes or string with 'for' attrib
      * @param string $cont Tag content
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -202,6 +216,7 @@
         if (is_string($attr)) {
             $attr = array('for' => $attr);
         }
+
         return self::tag('label', $attr, $cont, array_merge(self::$common_attrib, array('for')));
     }
 
@@ -209,6 +224,7 @@
      * Derrived method to create <iframe></iframe>
      *
      * @param mixed $attr Hash array with tag attributes or string with frame source (src)
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -217,15 +233,17 @@
         if (is_string($attr)) {
             $attr = array('src' => $attr);
         }
+
         return self::tag('iframe', $attr, $cont, array_merge(self::$common_attrib,
-            array('src','name','width','height','border','frameborder','onload')));
+            array('src','name','width','height','border','frameborder','onload','allowfullscreen')));
     }
 
     /**
      * Derrived method to create <script> tags
      *
-     * @param mixed $attr Hash array with tag attributes or string with script source (src)
+     * @param mixed  $attr Hash array with tag attributes or string with script source (src)
      * @param string $cont Javascript code to be placed as tag content
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -248,6 +266,8 @@
     /**
      * Derrived method for line breaks
      *
+     * @param array $attrib  Associative arry with tag attributes
+     *
      * @return string HTML code
      * @see html::tag()
      */
@@ -259,8 +279,9 @@
     /**
      * Create string with attributes
      *
-     * @param array $attrib Associative arry with tag attributes
+     * @param array $attrib  Associative arry with tag attributes
      * @param array $allowed List of allowed attributes
+     *
      * @return string Valid attribute string
      */
     public static function attrib_string($attrib = array(), $allowed = null)
@@ -269,17 +290,27 @@
             return '';
         }
 
-        $allowed_f = array_flip((array)$allowed);
+        $allowed_f  = array_flip((array)$allowed);
         $attrib_arr = array();
+
         foreach ($attrib as $key => $value) {
             // skip size if not numeric
             if ($key == 'size' && !is_numeric($value)) {
                 continue;
             }
 
-            // ignore "internal" or not allowed attributes
-            if ($key == 'nl' || ($allowed && !isset($allowed_f[$key])) || $value === null) {
+            // ignore "internal" or empty attributes
+            if ($key == 'nl' || $value === null) {
                 continue;
+            }
+
+            // ignore not allowed attributes, except aria-* and data-*
+            if (!empty($allowed)) {
+                $is_data_attr = @substr_compare($key, 'data-', 0, 5) === 0;
+                $is_aria_attr = @substr_compare($key, 'aria-', 0, 5) === 0;
+                if (!$is_aria_attr && !$is_data_attr && !isset($allowed_f[$key])) {
+                    continue;
+                }
             }
 
             // skip empty eventhandlers
@@ -305,6 +336,7 @@
      * Convert a HTML attribute string attributes to an associative array (name => value)
      *
      * @param string Input string
+     *
      * @return array Key-value pairs of parsed attributes
      */
     public static function parse_attrib_string($str)
@@ -356,7 +388,7 @@
 class html_inputfield extends html
 {
     protected $tagname = 'input';
-    protected $type = 'text';
+    protected $type    = 'text';
     protected $allowed = array(
         'type','name','value','size','tabindex','autocapitalize','required',
         'autocomplete','checked','onchange','onclick','disabled','readonly',
@@ -383,8 +415,9 @@
     /**
      * Compose input tag
      *
-     * @param string $value Field value
+     * @param string $value  Field value
      * @param array  $attrib Additional attributes to override
+     *
      * @return string HTML output
      */
     public function show($value = null, $attrib = null)
@@ -400,6 +433,7 @@
         }
         // set type
         $this->attrib['type'] = $this->type;
+
         return parent::show();
     }
 }
@@ -424,9 +458,9 @@
 class html_hiddenfield extends html
 {
     protected $tagname = 'input';
-    protected $type = 'hidden';
-    protected $fields_arr = array();
+    protected $type    = 'hidden';
     protected $allowed = array('type','name','value','onchange','disabled','readonly');
+    protected $fields_arr = array();
 
     /**
      * Constructor
@@ -461,6 +495,7 @@
         foreach ($this->fields_arr as $attrib) {
             $out .= self::tag($this->tagname, array('type' => $this->type) + $attrib);
         }
+
         return $out;
     }
 }
@@ -480,6 +515,7 @@
      *
      * @param string $value  Value of the checked field
      * @param array  $attrib Additional attributes to override
+     *
      * @return string HTML output
      */
     public function show($value = '', $attrib = null)
@@ -511,6 +547,7 @@
      *
      * @param string $value  Value of the checked field
      * @param array  $attrib Additional attributes to override
+     *
      * @return string HTML output
      */
     public function show($value = '', $attrib = null)
@@ -544,6 +581,7 @@
      *
      * @param string $value  Textbox value
      * @param array  $attrib Additional attributes to override
+     *
      * @return string HTML output
      */
     public function show($value = '', $attrib = null)
@@ -604,16 +642,17 @@
      *
      * @param mixed $names  Option name or array with option names
      * @param mixed $values Option value or array with option values
+     * @param array $attrib Additional attributes for the option entry
      */
-    public function add($names, $values = null)
+    public function add($names, $values = null, $attrib = array())
     {
         if (is_array($names)) {
             foreach ($names as $i => $text) {
-                $this->options[] = array('text' => $text, 'value' => $values[$i]);
+                $this->options[] = array('text' => $text, 'value' => $values[$i]) + $attrib;
             }
         }
         else {
-            $this->options[] = array('text' => $names, 'value' => $values);
+            $this->options[] = array('text' => $names, 'value' => $values) + $attrib;
         }
     }
 
@@ -622,6 +661,7 @@
      *
      * @param string $select Value of the selection option
      * @param array  $attrib Additional attributes to override
+     *
      * @return string HTML output
      */
     public function show($select = array(), $attrib = null)
@@ -644,7 +684,7 @@
                 $option_content = self::quote($option_content);
             }
 
-            $this->content .= self::tag('option', $attr, $option_content);
+            $this->content .= self::tag('option', $attr + $option, $option_content, array('value','label','class','style','title','disabled','selected'));
         }
 
         return parent::show();
@@ -664,8 +704,8 @@
     protected $allowed = array('id','class','style','width','summary',
         'cellpadding','cellspacing','border');
 
-    private $header = array();
-    private $rows = array();
+    private $header   = array();
+    private $rows     = array();
     private $rowindex = 0;
     private $colindex = 0;
 
@@ -676,8 +716,8 @@
      */
     public function __construct($attrib = array())
     {
-        $default_attrib = self::$doctype == 'xhtml' ? array('summary' => '', 'border' => 0) : array();
-        $this->attrib = array_merge($attrib, $default_attrib);
+        $default_attrib = self::$doctype == 'xhtml' ? array('summary' => '', 'border' => '0') : array();
+        $this->attrib   = array_merge($attrib, $default_attrib);
 
         if (!empty($attrib['tagname']) && $attrib['tagname'] != 'table') {
           $this->tagname = $attrib['tagname'];
@@ -765,7 +805,7 @@
         $this->colindex = 0;
         $this->rows[$this->rowindex] = new stdClass;
         $this->rows[$this->rowindex]->attrib = $attr;
-        $this->rows[$this->rowindex]->cells = array();
+        $this->rows[$this->rowindex]->cells  = array();
     }
 
     /**
@@ -812,6 +852,7 @@
      * Build HTML output of the table data
      *
      * @param array $attrib Table attributes
+     *
      * @return string The final table HTML code
      */
     public function show($attrib = null)
@@ -826,7 +867,7 @@
         if (!empty($this->header)) {
             $rowcontent = '';
             foreach ($this->header as $c => $col) {
-                $rowcontent .= self::tag($this->_col_tagname(), $col->attrib, $col->content);
+                $rowcontent .= self::tag($this->_head_tagname(), $col->attrib, $col->content);
             }
             $thead = $this->tagname == 'table' ? self::tag('thead', null, self::tag('tr', null, $rowcontent, parent::$common_attrib)) :
                 self::tag($this->_row_tagname(), array('class' => 'thead'), $rowcontent, parent::$common_attrib);
@@ -883,6 +924,15 @@
     }
 
     /**
+     * Getter for the corresponding tag name for table row elements
+     */
+    private function _head_tagname()
+    {
+        static $head_tagnames = array('table' => 'th', '*' => 'span');
+        return $head_tagnames[$this->tagname] ?: $head_tagnames['*'];
+    }
+
+    /**
      * Getter for the corresponding tag name for table cell elements
      */
     private function _col_tagname()
@@ -890,5 +940,4 @@
         static $col_tagnames = array('table' => 'td', '*' => 'span');
         return $col_tagnames[$this->tagname] ?: $col_tagnames['*'];
     }
-
 }

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