[wp-trac] [WordPress Trac] #28937: Post content randomly disappears in editor after save

[WordPress Trac]

#28937: Post content randomly disappears in editor after save
--------------------------+-----------------------------
 Reporter:  chaoix        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  3.9.1
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 Running Wordpress on PHP 5.3 and IIS 7.5.

 Content randomly disappears after saving posts. I wrote a plugin as
 workaround for the issue until this is fixed in core.
 {{{
 #!php
 <?php
 /*
 Plugin Name: TinyMCE and wpautop Fix
 Description: Fixing a bug in the wpeditor and wpautop that causes content
 to randomly disappear.
 Version: 1.0.0
 Author: Matthew Sigley
 License: GPL2
 */

 defined( 'WPINC' ) || header( 'HTTP/1.1 403' ) & exit; // Prevent direct
 access

 //Tinymce Fix
 if( is_admin() ) {
         add_filter('the_editor_content', 'tinymce_fix_filters', 1);
         function tinymce_fix_filters($content) {
                 remove_filter('the_editor_content', 'wp_richedit_pre');
                 remove_filter('the_editor_content', 'wp_htmledit_pre');

                 // 'html' is used for the "Text" editor tab.
                 if ( 'html' === wp_default_editor() )
                         add_filter('the_editor_content',
 'wp_htmledit_pre_fixed');
                 else
                         add_filter('the_editor_content',
 'wp_richedit_pre_fixed');

                 return $content;
         }

         function wp_richedit_pre_fixed($text) {
                 if( empty($text) ) return $text;

                 $output = convert_chars($text);
                 $output = wpautop($output);
                 $output = htmlspecialchars($output, ENT_NOQUOTES,
 get_option( 'blog_charset' ) );
                 return $text;
         }

         function wp_htmledit_pre_fixed($output) {
                 if ( !empty($output) )
                         $output = htmlspecialchars($output, ENT_NOQUOTES,
 get_option( 'blog_charset' ) ); // convert only < > &

                 return $output;
         }
 }
 //wpautop fix
 add_action('wp_loaded', 'wpautop_fix_filters');
 function wpautop_fix_filters() {
         $filters = array('term_description' => 10,
                                         'the_content' => 10,
                                         'the_excerpt' => 10,
                                         'comment_text' => 30);
         foreach( $filters as $filter => $priority ) {
                 remove_filter($filter, 'wpautop', $priority);
                 add_filter($filter, 'wpautop_fixed', $priority);
         }
 }

 function wpautop_fixed($pee, $br = true) {
         $pre_tags = array();

         if ( trim($pee) === '' )
                 return '';

         $pee = $pee . "\n"; // just to make things a little easier, pad
 the end

         if ( strpos($pee, '<pre') !== false ) {
                 $pee_parts = explode( '</pre>', $pee );
                 $last_pee = array_pop($pee_parts);
                 $pee = '';
                 $i = 0;

                 foreach ( $pee_parts as $pee_part ) {
                         $start = strpos($pee_part, '<pre');

                         // Malformed html?
                         if ( $start === false ) {
                                 $pee .= $pee_part;
                                 continue;
                         }

                         $name = "<pre wp-pre-tag-$i></pre>";
                         $pre_tags[$name] = substr( $pee_part, $start ) .
 '</pre>';

                         $pee .= substr( $pee_part, 0, $start ) . $name;
                         $i++;
                 }

                 $pee .= $last_pee;
         }

         $pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
         // Space things out a little
         $allblocks =
 '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|noscript|legend|section|article|aside|hgroup|header|footer|nav|figure|details|menu|summary)';
         $pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1",
 $pee);
         $pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
         $pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-
 platform newlines

         if ( strpos( $pee, '</object>' ) !== false ) {
                 // no P/BR around param and embed
                 $pee = preg_replace( '|(<object[^>]*>)\s*|', '$1', $pee );
                 $pee = preg_replace( '|\s*</object>|', '</object>', $pee
 );
                 $pee = preg_replace( '%\s*(</?(?:param|embed)[^>]*>)\s*%',
 '$1', $pee );
         }

         if ( strpos( $pee, '<source' ) !== false || strpos( $pee, '<track'
 ) !== false ) {
                 // no P/BR around source and track
                 $pee = preg_replace(
 '%([<\[](?:audio|video)[^>\]]*[>\]])\s*%', '$1', $pee );
                 $pee = preg_replace( '%\s*([<\[]/(?:audio|video)[>\]])%',
 '$1', $pee );
                 $pee = preg_replace( '%\s*(<(?:source|track)[^>]*>)\s*%',
 '$1', $pee );
         }

         $pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of
 duplicates
         // make paragraphs, including one at the end
         $pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
         $pee = '';

         foreach ( $pees as $tinkle ) {
                 $pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
         }

         $pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain
 strange conditions it could create a P of entirely whitespace
         $pee = preg_replace('!<p>([^<]+)</(div|address|form)>!',
 "<p>$1</p></$2>", $pee);
         $pee = preg_replace('!<p>\s*(</?' . $allblocks .
 '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
         $pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem
 with nested lists
         $pee = preg_replace('|<p><blockquote([^>]*)>|i',
 "<blockquote$1><p>", $pee);
         $pee = str_replace('</blockquote></p>', '</p></blockquote>',
 $pee);
         $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1",
 $pee);
         $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!',
 "$1", $pee);

         if ( $br ) {
                 $pee =
 preg_replace_callback('/<(script|style).*?<\/\\1>/s',
 '_autop_newline_preservation_helper', $pee);
                 //Added u flag to the regex in the next line
                 $pee = preg_replace('|(?<!<br />)\s*\n|u', "<br />\n",
 $pee); // optionally make line breaks
                 $pee = str_replace('<WPPreserveNewline />', "\n", $pee);
         }

         $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!',
 "$1", $pee);
         $pee = preg_replace('!<br
 />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
         $pee = preg_replace( "|\n</p>$|", '</p>', $pee );

         if ( !empty($pre_tags) )
                 $pee = str_replace(array_keys($pre_tags),
 array_values($pre_tags), $pee);

         return $pee;
 }
 }}}

--
Ticket URL: <https://core.trac.wordpress.org/ticket/28937>
WordPress Trac <https://core.trac.wordpress.org/>
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