4 * Copyright 1999, 2000, 2001, 2002, 2004 $ThePhpWikiProgrammingTeam
6 * This file is part of PhpWiki.
8 * PhpWiki is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * PhpWiki is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with PhpWiki; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * lib/diff.php converted to a plugin by electrawn,
24 * plugin cleaned up by rurban,
27 * Would make sense to see arbitrary diff's between any files or revisions.
30 require_once('lib/diff.php');
39 function getDescription () {
40 return _("Display differences between revisions");
43 // Establish default values for each of this plugin's arguments.
44 // todo: makes only sense with more args.
45 function getDefaultArguments() {
46 return array('pagename' => '[pagename]',
49 'previous' => 'major', // author, minor or major
53 function PageInfoRow ($label, $rev, &$request) {
55 global $WikiTheme, $WikiNameRegexp;
57 $row = HTML::tr(HTML::td(array('align' => 'right'), $label));
59 $author = $rev->get('author');
60 $dbi = $request->getDbh();
62 $iswikipage = (isWikiWord($author) && $dbi->isWikiPage($author));
63 $authorlink = $iswikipage ? WikiLink($author) : $author;
65 $linked_version = WikiLink($rev, 'existing', $rev->getVersion());
66 $row->pushContent(HTML::td(fmt("version %s", $linked_version)),
67 HTML::td($WikiTheme->getLastModifiedMessage($rev,
69 HTML::td(fmt("by %s", $authorlink)));
71 $row->pushContent(HTML::td(array('colspan' => '3'), _("None")));
76 function run($dbi, $argstr, &$request, $basepage) {
77 extract($this->getArgs($argstr, $request));
78 if (is_array($versions)) {
79 // Version selection from pageinfo.php display:
81 list ($version, $previous) = $versions;
84 // Check if user is allowed to get the Page.
85 if (!mayAccessPage ('view', $pagename)) {
86 return $this->error(sprintf(_("Illegal access to page %s: no read access"),
90 // abort if page doesn't exist
91 $page = $request->getPage($pagename);
92 $current = $page->getCurrentRevision();
93 if ($current->getVersion() < 1) {
94 $html = HTML(HTML::p(fmt("I'm sorry, there is no such page as %s.",
95 WikiLink($pagename, 'unknown'))));
96 return $html; //early return
100 if (!($new = $page->getRevision($version)))
101 NoSuchRevision($request, $page, $version);
102 $new_version = fmt("version %d", $version);
106 $new_version = _("current version");
109 if (preg_match('/^\d+$/', $previous)) {
110 if ( !($old = $page->getRevision($previous)) )
111 NoSuchRevision($request, $page, $previous);
112 $old_version = fmt("version %d", $previous);
113 $others = array('major', 'minor', 'author');
119 while ($old = $page->getRevisionBefore($old)) {
120 if ($old->get('author') != $new->get('author'))
123 $old_version = _("revision by previous author");
124 $others = array('major', 'minor');
128 $old = $page->getRevisionBefore($new);
129 $old_version = _("previous revision");
130 $others = array('major', 'author');
135 while ($old && $old->get('is_minor_edit'))
136 $old = $page->getRevisionBefore($old);
138 $old = $page->getRevisionBefore($old);
139 $old_version = _("predecessor to the previous major change");
140 $others = array('minor', 'author');
145 $new_link = WikiLink($new, '', $new_version);
146 $old_link = $old ? WikiLink($old, '', $old_version) : $old_version;
147 $page_link = WikiLink($page);
149 $html = HTML(HTML::p(fmt("Differences between %s and %s of %s.",
150 $new_link, $old_link, $page_link)));
152 $otherdiffs = HTML::p(_("Other diffs:"));
153 $label = array('major' => _("Previous Major Revision"),
154 'minor' => _("Previous Revision"),
155 'author'=> _("Previous Author"));
156 foreach ($others as $other) {
157 $args = array('pagename' => $pagename, 'previous' => $other);
159 $args['version'] = $version;
160 if (count($otherdiffs->getContent()) > 1)
161 $otherdiffs->pushContent(", ");
163 $otherdiffs->pushContent(" ");
164 $otherdiffs->pushContent(Button($args, $label[$other]));
166 $html->pushContent($otherdiffs);
169 if ($old and $old->getVersion() == 0)
172 $html->pushContent(HTML::Table($this->PageInfoRow(_("Newer page:"), $new,
174 $this->PageInfoRow(_("Older page:"), $old,
178 $diff = new Diff($old->getContent(), $new->getContent());
180 if ($diff->isEmpty()) {
181 $html->pushContent(HTML::hr(),
182 HTML::p(_("Content of versions "), $old->getVersion(),
183 _(" and "), $new->getVersion(), _(" is identical.")));
184 // If two consecutive versions have the same content, it is because the page was
185 // renamed, or metadata changed: ACL, owner, markup.
186 // We give the reason by printing the summary.
187 if (($new->getVersion() - $old->getVersion()) == 1) {
188 $html->pushContent(HTML::p(_("Version "), $new->getVersion(),
189 _(" was created because: "), $new->get('summary')));
192 $fmt = new HtmlUnifiedDiffFormatter;
193 $html->pushContent($fmt->format($diff));
205 // c-hanging-comment-ender-p: nil
206 // indent-tabs-mode: nil