mod/wiki/ewiki/plugins/moodle/diff.php

   1 <?php // $Id$
   2
   3  # this is the "stupid diff", which shows up changes between two
   4  # saved versions of a WikiPage; even if working very unclean it
   5  # allows to see what has changed
   6  # it is accessible through the "info about page" action
   7
   8
   9
  10  $ewiki_plugins["action"]["diff"] = "ewiki_page_stupid_diff";
  11  $ewiki_config["action_links"]["info"]["diff"] = "diff";
  12
  13
  14
  15  function ewiki_page_stupid_diff($id, $data, $action) {
  16     global $wiki, $moodle_format;
  17
  18     if ($uu=$GLOBALS["ewiki_diff_versions"]) {
  19        list($new_ver, $old_ver) = $uu;
  20        $data = ewiki_database("GET", array("id" => $id, "version" => $new_ver));
  21     }
  22     else {
  23        $new_ver = $data["version"];
  24        $old_ver = $new_ver - 1;
  25     }
  26     if ($old_ver > 0) {
  27        $data0 = ewiki_database("GET", array("id" => $id, "version" => $old_ver));
  28     }
  29
  30     $a->new_ver=$new_ver;
  31     $a->old_ver=$old_ver;
  32     $a->pagename=$id;
  33     $o = ewiki_make_title($id, get_string("differences","wiki",$a));
  34
  35     # Different handling for html: closes Bug #1530 - Wiki diffs useless when using HTML editor
  36     if($wiki->htmlmode==2) {
  37         /// first do the formatiing to get normal display format without filters
  38         $options = new object();
  39         $options->smiley = false;
  40         $options->filter = false;
  41         $content0 = format_text($data0['content'], $moodle_format, $options);
  42         $content = format_text($data['content'], $moodle_format, $options);
  43
  44         /// Remove all new line characters. They will be placed at HTML line breaks.
  45         $content0 = preg_replace('/\n|\r/i', ' ', $content0);
  46         $content0 = preg_replace('/(\S)\s+(\S)/', '$1 $2', $content0); // Remove multiple spaces.
  47         $content = preg_replace('/\n|\r/i', ' ', $content);
  48         $content = preg_replace('/(\S)\s+(\S)/', '$1 $2', $content);
  49
  50         /// Replace <p>&nbsp;</p>
  51         $content0 = preg_replace('#(<p( [^>]*)?>(&nbsp;|\s+)</p>)|(<p( [^>]*)?></p>)#i', "\n", $content0);
  52         $content = preg_replace('#(<p( [^>]*)?>(&nbsp;|\s+)</p>)|(<p( [^>]*)?></p>)#i', "\n", $content);
  53
  54
  55         /// Place new line characters at logical HTML positions.
  56         $htmlendings = array('+(<br.*?>)+iU', '+(<p( [^>]*)?>)+iU', '+(</p>)+i', '+(<hr.*?>)+iU', '+(<ol.*?>)+iU',
  57                              '+(</ol>)+i', '+(<ul.*?>)+iU', '+(</ul>)+i', '+(<li.*?>)+iU', '+(</li>)+i',
  58                              '+(</tr>)+i', '+(<div.*?>)+iU', '+(</div>)+i');
  59         $htmlrepl = array("\n\$1\n", "\n\$1\n", "\n\$1\n", "\n\$1\n", "\n\$1\n",
  60                           "\n\$1\n", "\n\$1\n", "\n\$1\n", "\n\$1\n", "\n\$1\n",
  61                           "\n\$1\n", "\n\$1\n", "\n\$1\n");
  62         $content0 = preg_replace($htmlendings, $htmlrepl, $content0);
  63         $content = preg_replace($htmlendings, $htmlrepl, $content);
  64     } else {
  65       $content0=$data0["content"];
  66       $content=$data["content"];
  67     }
  68     $txt0 = preg_split("+\s*\n+", trim($content0));
  69     $txt2 = preg_split("+\s*\n+", trim($content));
  70
  71     $diff0 = array_diff($txt0, $txt2);
  72     $diff2 = array_diff($txt2, $txt0);
  73
  74     foreach ($txt2 as $i => $line) {
  75        $i2 = $i;
  76        while ($rm = $diff0[$i2++]) {
  77           if($wiki->htmlmode == 2) {
  78             if ($rm == '<br />') { //ugly hack to fix line breaks
  79                 $rm = '';
  80             }
  81             $o .= "<b>-</b><font color=\"#990000\">".format_text($rm, $moodle_format, $options)."</font><br />\n";
  82           } else {
  83             $o .= "<b>-</b><font color=\"#990000\"><tt>".s($rm)."</tt></font><br />\n";
  84           }
  85           unset($diff0[$i2-1]);
  86        }
  87
  88        if (in_array($line, $diff2)) {
  89           if($wiki->htmlmode == 2) {
  90             if ($line == '<br />') { //ugly hack to fix line breaks
  91                 $line = '';
  92             }
  93             $o .= "<b>+</b><font color=\"#009900\">".format_text($line, $moodle_format, $options)."</font><br />\n";
  94           } else {
  95             $o .= "<b>+</b><font color=\"#009900\"><tt>".s($line)."</tt></font><br />\n";
  96           }
  97        }
  98        else {
  99           if($wiki->htmlmode == 2) {
 100             $o .= format_text($line, $moodle_format, $options)."\n";
 101           } else {
 102             $o .= "&nbsp; ".s($line)."<br />\n";
 103           }
 104        }
 105
 106     }
 107
 108     foreach ($diff0 as $rm) {
 109        $o .= "<b>-</b><font color=\"#990000\"> <tt>".s($rm)."</tt></font><br />\n";
 110     }
 111
 112     return($o);
 113  }
 114 ?>