lib/display.php

   1 <?php
   2 // display.php: fetch page or get default content
   3 rcs_id('$Id: display.php,v 1.42 2003-02-21 04:12:05 dairiki Exp $');
   4
   5 require_once('lib/Template.php');
   6
   7 /**
   8  * Guess a short description of the page.
   9  *
  10  * Algorithm:
  11  *
  12  * This algorithm was suggested on MeatballWiki by
  13  * Alex Schroeder <kensanata@yahoo.com>.
  14  *
  15  * Use the first paragraph in the page which contains at least two
  16  * sentences.
  17  *
  18  * @see http://www.usemod.com/cgi-bin/mb.pl?MeatballWikiSuggestions
  19  */
  20 function GleanDescription ($rev) {
  21     $two_sentences
  22         = pcre_fix_posix_classes("/[.?!]\s+[[:upper:])]"
  23                                  . ".*"
  24                                  . "[.?!]\s*([[:upper:])]|$)/sx");
  25     // Escape strings
  26     $content = preg_replace("/(['\"])/", "\$1", $rev->getPackedContent());
  27
  28     // Iterate through paragraphs.
  29     while (preg_match('/(?: ^ \w .* $ \n? )+/mx', $content, $m)) {
  30         $paragraph = $m[0];
  31
  32         // Return paragraph if it contains at least two sentences.
  33         if (preg_match($two_sentences, $paragraph)) {
  34             return preg_replace("/\s*\n\s*/", " ", trim($paragraph));
  35         }
  36
  37         $content = substr(strstr($content, $paragraph), strlen($paragraph));
  38     }
  39     return '';
  40 }
  41
  42
  43 /** Make a link back to redirecting page.
  44  *
  45  * @param $pagename string  Name of redirecting page.
  46  * @return XmlContent Link to the redirecting page.
  47  */
  48 function RedirectorLink($pagename) {
  49     $url = WikiURL($pagename, array('redirectfrom' => ''));
  50     return HTML::a(array('class' => 'redirectfrom wiki',
  51                          'href' => $url),
  52                    $pagename);
  53 }
  54
  55
  56 function actionPage(&$request, $action) {
  57     global $Theme;
  58
  59     $pagename = $request->getArg('pagename');
  60     $version = $request->getArg('version');
  61
  62     $page = $request->getPage();
  63     $revision = $page->getCurrentRevision();
  64
  65     $dbi = $request->getDbh();
  66     $actionpage = $dbi->getPage($action);
  67     $actionrev = $actionpage->getCurrentRevision();
  68
  69     // $splitname = split_pagename($pagename);
  70
  71     $pagetitle = HTML(fmt("%s: %s", $actionpage->getName(),
  72                           $Theme->linkExistingWikiWord($pagename, false, $version)));
  73
  74     $validators = new HTTP_ValidatorSet(array('pageversion' => $revision->getVersion(),
  75                                               '%mtime' => $revision->get('mtime')));
  76
  77     $request->appendValidators(array('pagerev' => $revision->getVersion(),
  78                                      '%mtime' => $revision->get('mtime')));
  79     $request->appendValidators(array('actionpagerev' => $actionrev->getVersion(),
  80                                      '%mtime' => $actionrev->get('mtime')));
  81
  82     $transformedContent = $actionrev->getTransformedContent();
  83     $template = Template('browse', array('CONTENT' => $transformedContent));
  84
  85     header("Content-Type: text/html; charset=" . CHARSET);
  86     GeneratePage($template, $pagetitle, $revision);
  87     $request->checkValidators();
  88     flush();
  89 }
  90
  91 function displayPage(&$request, $tmpl = 'browse') {
  92     $pagename = $request->getArg('pagename');
  93     $version = $request->getArg('version');
  94     $page = $request->getPage();
  95     if ($version) {
  96         $revision = $page->getRevision($version);
  97         if (!$revision)
  98             NoSuchRevision($request, $page, $version);
  99     }
 100     else {
 101         $revision = $page->getCurrentRevision();
 102     }
 103
 104     $splitname = split_pagename($pagename);
 105     if (isSubPage($pagename)) {
 106         $pages = explode(SUBPAGE_SEPARATOR,$pagename);
 107         $last_page = array_pop($pages); // deletes last element from array as side-effect
 108         $pagetitle = HTML::span(HTML::a(array('href' => WikiURL($pages[0]),
 109                                               'class' => 'pagetitle'
 110                                               ),
 111                                         split_pagename($pages[0] . SUBPAGE_SEPARATOR)));
 112         $first_pages = $pages[0] . SUBPAGE_SEPARATOR;
 113         array_shift($pages);
 114         foreach ($pages as $p)  {
 115             $pagetitle->pushContent(HTML::a(array('href' => WikiURL($first_pages . $p),
 116                                                   'class' => 'backlinks'),
 117                                        split_pagename($p . SUBPAGE_SEPARATOR)));
 118             $first_pages .= $p . SUBPAGE_SEPARATOR;
 119         }
 120         $backlink = HTML::a(array('href' => WikiURL($pagename,
 121                                                     array('action' => _("BackLinks"))),
 122                                   'class' => 'backlinks'),
 123                             split_pagename($last_page));
 124         $backlink->addTooltip(sprintf(_("BackLinks for %s"), $pagename));
 125         $pagetitle->pushContent($backlink);
 126     } else {
 127         $pagetitle = HTML::a(array('href' => WikiURL($pagename,
 128                                                      array('action' => _("BackLinks"))),
 129                                    'class' => 'backlinks'),
 130                              $splitname);
 131         $pagetitle->addTooltip(sprintf(_("BackLinks for %s"), $pagename));
 132     }
 133
 134     $redirect_from = $request->getArg('redirectfrom');
 135     if ($redirect_from) {
 136         $redirect_from = fmt("Redirected from %s", RedirectorLink($redirect_from));
 137     }
 138
 139     //include_once('lib/BlockParser.php');
 140
 141     $request->appendValidators(array('pagerev' => $revision->getVersion(),
 142                                      '%mtime' => $revision->get('mtime')));
 143
 144     if ($frame = $request->getArg('frame')) {
 145         if (in_array($frame, array('body','browse','editpage')))
 146             $template = Template($frame, array('CONTENT' => $revision->getTransformedContent()));
 147         elseif ($frame == 'top')
 148             $template = Template($frame, array('framesrc' => $request->getArg('framesrc')));
 149         else
 150             $template = Template($frame);
 151     } else {
 152         $transformedContent = $revision->getTransformedContent();
 153         $template = Template('browse', array('CONTENT' => $transformedContent));
 154     }
 155
 156     header("Content-Type: text/html; charset=" . CHARSET); // FIXME: this gets done twice?
 157
 158     GeneratePage($template, $pagetitle, $revision,
 159                  array('ROBOTS_META'    => 'index,follow',
 160                        'PAGE_DESCRIPTION' => GleanDescription($revision),
 161                        'REDIRECT_FROM' => $redirect_from));
 162     $request->checkValidators();
 163     flush();
 164     $page->increaseHitCount();
 165 }
 166
 167 // For emacs users
 168 // Local Variables:
 169 // mode: php
 170 // tab-width: 8
 171 // c-basic-offset: 4
 172 // c-hanging-comment-ender-p: nil
 173 // indent-tabs-mode: nil
 174 // End:
 175 ?>