1 files changed, 44 insertions, 3 deletions

diff --git a/modules/tag/controllers/tag.php b/modules/tag/controllers/tag.php
index 7786daa1..559e2a5a 100644
--- a/modules/tag/controllers/tag.php
+++ b/modules/tag/controllers/tag.php
@@ -22,7 +22,22 @@ class Tag_Controller extends Controller {
     $tag_id = $function;
     $tag = ORM::factory("tag")->where("id", "=", $tag_id)->find();
     $page_size = module::get_var("gallery", "page_size", 9);
-    $page = (int) Input::instance()->get("page", "1");
+
+    $input = Input::instance();
+    $show = $input->get("show");
+
+    if ($show) {
+      $child = ORM::factory("item", $show);
+      $index = tag::get_position($tag, $child);
+      if ($index) {
+        $page = ceil($index / $page_size);
+        $uri = "tag/$tag_id/" . urlencode($tag->name);
+        url::redirect($uri . ($page == 1 ? "" : "?page=$page"));
+      }
+    } else {
+      $page = (int) $input->get("page", "1");
+    }
+
     $children_count = $tag->items_count();
     $offset = ($page-1) * $page_size;
     $max_pages = max(ceil($children_count / $page_size), 1);
@@ -44,11 +59,37 @@ class Tag_Controller extends Controller {
             "children" => $tag->items($page_size, $offset),
             "breadcrumbs" => array(
               Breadcrumb::instance($root->title, $root->url())->set_first(),
-              Breadcrumb::instance($tag->name, $tag->url())->set_last()),
+              Breadcrumb::instance(t("Tag: %tag_name", array("tag_name" => $tag->name)),
+                                   $tag->url())->set_last()),
             "children_count" => $children_count));
     $template->content = new View("dynamic.html");
     $template->content->title = t("Tag: %tag_name", array("tag_name" => $tag->name));
-
     print $template;
+
+    item::set_display_context_callback("Tag_Controller::get_display_context", $tag->id);
+  }
+
+  static function get_display_context($item, $tag_id) {
+    $tag = ORM::factory("tag", $tag_id);
+    $where = array(array("type", "!=", "album"));
+
+    $position = tag::get_position($tag, $item, $where);
+    if ($position > 1) {
+      list ($previous_item, $ignore, $next_item) = $tag->items(3, $position - 2, $where);
+    } else {
+      $previous_item = null;
+      list ($next_item) = $tag->items(1, $position, $where);
+    }
+
+    $root = item::root();
+    return array("position" => $position,
+                 "previous_item" => $previous_item,
+                 "next_item" => $next_item,
+                 "sibling_count" => $tag->items_count($where),
+                 "breadcrumbs" => array(
+                   Breadcrumb::instance($root->title, $root->url())->set_first(),
+                   Breadcrumb::instance(t("Tag: %tag_name", array("tag_name" => $tag->name)),
+                                        $tag->url("show={$item->id}")),
+                   Breadcrumb::instance($item->title, $item->url())->set_last()));
   }
 }