From 6e2f04583728714ff937eb1fa3ab34e99bcdb6a6 Mon Sep 17 00:00:00 2001
From: Meitar Moscovitz <meitarm@gmail.com>
Date: Mon, 9 Feb 2009 00:02:51 +1100
Subject: Add machine-readable pagination using HTML4.01 `<link rel="next">`,
 etc.

These extra `<link>` elements only appear on pages where pagination
makes sense. They trigger functionality in some user agents, such as
Opera's Navigation Bar for more easily navigating forward and backwards
across a paged set of notices, messages, or group lists, etc.
---
 actions/tag.php | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'actions/tag.php')

diff --git a/actions/tag.php b/actions/tag.php
index 4401f892a..f71f6d342 100644
--- a/actions/tag.php
+++ b/actions/tag.php
@@ -69,6 +69,28 @@ class TagAction extends Action
                                      'title' => sprintf(_('Feed for tag %s'), $this->tag)));
     }
 
+    /**
+     * Output document relationship links
+     *
+     * @return void
+     */
+    function showRelationshipLinks()
+    {
+        // Machine-readable pagination
+        if ($this->page > 1) {
+            $this->element('link', array('rel' => 'next',
+                                         'href' => common_local_url('tag',
+                                                                    array('tag' => $this->tag,
+                                                                          'page' => $this->page - 1)),
+                                         'title' => _('Next Notices')));
+        }
+        $this->element('link', array('rel' => 'prev',
+                                     'href' => common_local_url('tag',
+                                                                array('tag' => $this->tag,
+                                                                      'page' => $this->page + 1)),
+                                     'title' => _('Previous Notices')));
+    }
+
     function showPageNotice()
     {
         return sprintf(_('Messages tagged "%s", most recent first'), $this->tag);
-- 
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