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/difflib.php');
31 require_once('lib/diff.php');
40 function getDescription () {
41 return _("Display differences between revisions");
44 function getVersion() {
45 return preg_replace("/[Revision: $]/", '',
49 // Establish default values for each of this plugin's arguments.
50 // todo: makes only sense with more args.
51 function getDefaultArguments() {
52 return array('pagename' => '[pagename]',
55 'previous' => 'major', // author, minor or major
59 function PageInfoRow ($label, $rev, &$request) {
61 global $WikiTheme, $WikiNameRegexp;
63 $row = HTML::tr(HTML::td(array('align' => 'right'), $label));
65 $author = $rev->get('author');
66 $dbi = $request->getDbh();
68 $iswikipage = (isWikiWord($author) && $dbi->isWikiPage($author));
69 $authorlink = $iswikipage ? WikiLink($author) : $author;
71 $linked_version = WikiLink($rev, 'existing', $rev->getVersion());
72 $row->pushContent(HTML::td(fmt("version %s", $linked_version)),
73 HTML::td($WikiTheme->getLastModifiedMessage($rev,
75 HTML::td(fmt("by %s", $authorlink)));
77 $row->pushContent(HTML::td(array('colspan' => '3'), _("None")));
82 function run($dbi, $argstr, &$request, $basepage) {
83 extract($this->getArgs($argstr, $request));
84 if (is_array($versions)) {
85 // Version selection from pageinfo.php display:
87 list ($version, $previous) = $versions;
90 // Check if user is allowed to get the Page.
91 if (!mayAccessPage ('view', $pagename)) {
92 return $this->error(sprintf(_("Illegal access to page %s: no read access"),
96 // abort if page doesn't exist
97 $page = $request->getPage($pagename);
98 $current = $page->getCurrentRevision();
99 if ($current->getVersion() < 1) {
100 $html = HTML(HTML::p(fmt("I'm sorry, there is no such page as %s.",
101 WikiLink($pagename, 'unknown'))));
102 return $html; //early return
106 if (!($new = $page->getRevision($version)))
107 NoSuchRevision($request, $page, $version);
108 $new_version = fmt("version %d", $version);
112 $new_version = _("current version");
115 if (preg_match('/^\d+$/', $previous)) {
116 if ( !($old = $page->getRevision($previous)) )
117 NoSuchRevision($request, $page, $previous);
118 $old_version = fmt("version %d", $previous);
119 $others = array('major', 'minor', 'author');
125 while ($old = $page->getRevisionBefore($old)) {
126 if ($old->get('author') != $new->get('author'))
129 $old_version = _("revision by previous author");
130 $others = array('major', 'minor');
134 $old = $page->getRevisionBefore($new);
135 $old_version = _("previous revision");
136 $others = array('major', 'author');
141 while ($old && $old->get('is_minor_edit'))
142 $old = $page->getRevisionBefore($old);
144 $old = $page->getRevisionBefore($old);
145 $old_version = _("predecessor to the previous major change");
146 $others = array('minor', 'author');
151 $new_link = WikiLink($new, '', $new_version);
152 $old_link = $old ? WikiLink($old, '', $old_version) : $old_version;
153 $page_link = WikiLink($page);
155 $html = HTML(HTML::p(fmt("Differences between %s and %s of %s.",
156 $new_link, $old_link, $page_link)));
158 $otherdiffs = HTML::p(_("Other diffs:"));
159 $label = array('major' => _("Previous Major Revision"),
160 'minor' => _("Previous Revision"),
161 'author'=> _("Previous Author"));
162 foreach ($others as $other) {
163 $args = array('pagename' => $pagename, 'previous' => $other);
165 $args['version'] = $version;
166 if (count($otherdiffs->getContent()) > 1)
167 $otherdiffs->pushContent(", ");
169 $otherdiffs->pushContent(" ");
170 $otherdiffs->pushContent(Button($args, $label[$other]));
172 $html->pushContent($otherdiffs);
175 if ($old and $old->getVersion() == 0)
178 $html->pushContent(HTML::Table($this->PageInfoRow(_("Newer page:"), $new,
180 $this->PageInfoRow(_("Older page:"), $old,
184 $diff = new Diff($old->getContent(), $new->getContent());
186 if ($diff->isEmpty()) {
187 $html->pushContent(HTML::hr(),
188 HTML::p(_("Content of versions "), $old->getVersion(),
189 _(" and "), $new->getVersion(), _(" is identical.")));
190 // If two consecutive versions have the same content, it is because the page was
191 // renamed, or metadata changed: ACL, owner, markup.
192 // We give the reason by printing the summary.
193 if (($new->getVersion() - $old->getVersion()) == 1) {
194 $html->pushContent(HTML::p(_("Version "), $new->getVersion(),
195 _(" was created because: "), $new->get('summary')));
198 $fmt = new HtmlUnifiedDiffFormatter;
199 $html->pushContent($fmt->format($diff));
212 // c-hanging-comment-ender-p: nil
213 // indent-tabs-mode: nil