mirror of
https://github.com/WhatCD/Gazelle.git
synced 2024-12-15 11:56:25 +00:00
95 lines
2.8 KiB
PHP
95 lines
2.8 KiB
PHP
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<?
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//Diff function by Leto of StC.
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function diff($OldText, $NewText) {
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$LineArrayOld = explode("\n",$OldText);
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$LineArrayNew = explode("\n",$NewText);
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$LineOffset = 0;
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$Result = array();
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foreach($LineArrayOld as $OldLine => $OldString) {
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$Key = $OldLine + $LineOffset;
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if($Key<0) { $Key = 0; }
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$Found = -1;
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while($Key<count($LineArrayNew)) {
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if ($OldString != $LineArrayNew[$Key]) {
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$Key++;
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} elseif ($OldString == $LineArrayNew[$Key]) {
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$Found = $Key;
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break;
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}
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}
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if($Found=='-1') { //we never found the old line in the new array
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$Result[] = '<span class="line_deleted">← '.$OldString.'</span><br />';
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$LineOffset = $LineOffset - 1;
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} elseif ($Found ==$OldLine+$LineOffset) {
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$Result[] = '<span class="line_unchanged"><strong>↕ '.$OldString.'</strong></span><br />';
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} elseif ($Found != $OldLine+$LineOffset) {
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if ($Found < $OldLine+$LineOffset) {
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$Result[] = '<span class="line_moved"><strong>⇤ '.$OldString.'</strong></span><br />';
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} else {
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$Result[] = '<span class="line_moved">← '.$OldString.'</span><br />';
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$Key = $OldLine + $LineOffset;
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while ($Key<$Found) {
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$Result[] = '<span class="line_new"><strong>→ '.$LineArrayNew[$Key].'</strong></span><br />';
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$Key++;
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}
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$Result[] = '<span class="line_moved"><strong>→ '.$OldString.'</strong></span><br />';
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}
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$LineOffset = $Found-$OldLine;
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}
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}
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if(count($LineArrayNew)>count($LineArrayOld) + $LineOffset) {
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$Key = count($LineArrayOld) + $LineOffset;
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while($Key<count($LineArrayNew)) {
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$Result[] = '<span class="line_new"><strong>→ '.$LineArrayNew[$Key].'</strong></span><br />';
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$Key++;
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}
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}
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return $Result;
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}
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function get_body($ID, $Rev) {
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global $DB, $Revision, $Body;
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if($Rev == $Revision) {
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$Str = $Body;
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} else {
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$DB->query("SELECT Body FROM wiki_revisions WHERE ID='$ID' AND Revision='$Rev'");
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if(!$DB->record_count()) { error(404); }
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list($Str) = $DB->next_record();
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}
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return $Str;
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}
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if (
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!isset($_GET['old']) ||
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!isset($_GET['new']) ||
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!isset($_GET['id']) ||
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!is_number($_GET['old']) ||
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!is_number($_GET['new']) ||
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!is_number($_GET['id']) ||
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$_GET['old'] > $_GET['new']
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) { error(0); }
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$ArticleID = $_GET['id'];
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$Article = $Alias->article($ArticleID);
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list($Revision, $Title, $Body, $Read, $Edit, $Date, $AuthorID, $AuthorName) = array_shift($Article);
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if($Read > $LoggedUser['Class']){ error(404); }
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show_header('Compare Article Revisions');
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$Diff2 = get_body($ArticleID, $_GET['new']);
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$Diff1 = get_body($ArticleID, $_GET['old']);
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?>
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<div class="thin">
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<h2>Compare <a href="wiki.php?action=article&id=<?=$ArticleID?>"><?=$Title?></a> Revisions</h2>
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<div class="box center_revision" id="center">
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<div class="body"><? foreach(diff($Diff1, $Diff2) AS $Line) { echo $Line; } ?></div>
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</div>
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</div>
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<?
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show_footer();
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?>
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