[empathy: 5/28] Add expander toggles

[Danielle Madeley <daniellem src gnome org>]

commit 7565c39bfa0f118fb513c0af86a5ba0ef7976277
Author: Danielle Madeley <danielle madeley collabora co uk>
Date:   Mon Aug 1 15:42:43 2011 +1000

    Add expander toggles

 data/empathy-log-window.html        |   66 +++++++++++++++++++++++++++++++++++
 libempathy-gtk/empathy-log-window.c |   23 ++++++++++++
 2 files changed, 89 insertions(+), 0 deletions(-)
---
diff --git a/data/empathy-log-window.html b/data/empathy-log-window.html
index 2b87647..f2e0cdf 100644
--- a/data/empathy-log-window.html
+++ b/data/empathy-log-window.html
@@ -15,6 +15,16 @@ div.row p {
   display: inline;
   white-space: pre-wrap;
 }
+
+span.open:after {
+  content: "\25BE";
+  margin-right: 2px;
+}
+
+span.closed:after {
+  content: "\25B8";
+  margin-right: 2px;
+}
     </style>
     <script type="text/javascript">
 function filterNodes (node, tagName)
@@ -42,6 +52,11 @@ function getContent(node)
   return filterNodes(node, 'P')[0];
 }
 
+function getToggle(node)
+{
+  return filterNodes(node, 'SPAN')[0];
+}
+
 function insertRow (path, text)
 {
   var treeview = document.getElementById('treeview');
@@ -67,10 +82,44 @@ function insertRow (path, text)
     parentnode.appendChild(newnode);
   else
     parentnode.insertBefore(newnode, nodes[path[i]]);
+
+  // add an expander
+  var toggle = document.createElement('span');
+  newnode.appendChild(toggle);
+  toggle.setAttribute('class', 'closed');
+  toggle.style.display = 'none';
+
+  toggle.onclick = function (e)
+    {
+      var display;
+      var nodes;
+
+      if (toggle.getAttribute('class') == 'closed')
+        {
+          toggle.setAttribute('class', 'open');
+          display = 'block';
+        }
+      else
+        {
+          toggle.setAttribute('class', 'closed');
+          display = 'none';
+        }
+
+      // console.log("clicked: " + display);
+
+      nodes = getNodes(newnode);
+
+      for (var i = 0; i < nodes.length; i++)
+        nodes[i].style.display = display;
+    };
   
   var contents = document.createElement('p');
   newnode.appendChild(contents);
   contents.innerHTML = text;
+
+  // if the node is not a top-level node, hide it
+  if (parentnode != treeview)
+    newnode.style.display = 'none';
 }
 
 function changeRow (path, text)
@@ -121,6 +170,23 @@ function reorderRows (path, new_order)
   for (var i = 0; i < nodes.length; i++)
     node.appendChild(nodes[new_order[i]]);
 }
+
+function hasChildRows (path, has_children)
+{
+  var treeview = document.getElementById('treeview');
+  var node = treeview;
+
+  // walk the tree
+  for (var i = 0; i < path.length; i++)
+    node = getNodes(node)[path[i]];
+
+  var toggle = getToggle(node);
+
+  if (has_children)
+    toggle.style.display = 'inline';
+  else
+    toggle.style.display = 'none';
+}
     </script>
   </head>
 
diff --git a/libempathy-gtk/empathy-log-window.c b/libempathy-gtk/empathy-log-window.c
index 9459ce2..ef6450f 100644
--- a/libempathy-gtk/empathy-log-window.c
+++ b/libempathy-gtk/empathy-log-window.c
@@ -430,6 +430,27 @@ store_events_row_deleted (GtkTreeModel *model,
 }
 
 static void
+store_events_has_child_rows (GtkTreeModel *model,
+    GtkTreePath *path,
+    GtkTreeIter *iter,
+    EmpathyLogWindow *self)
+{
+  char *str = gtk_tree_path_to_string (path);
+  char *script;
+
+  script = g_strdup_printf ("javascript:hasChildRows([%s], %u);",
+      g_strdelimit (str, ":", ','),
+      gtk_tree_model_iter_has_child (model, iter));
+
+  // g_print ("%s\n", script);
+  webkit_web_view_execute_script (WEBKIT_WEB_VIEW (self->priv->webview),
+      script);
+
+  g_free (str);
+  g_free (script);
+}
+
+static void
 store_events_rows_reordered (GtkTreeModel *model,
     GtkTreePath *path,
     GtkTreeIter *iter,
@@ -695,6 +716,8 @@ empathy_log_window_init (EmpathyLogWindow *self)
       G_CALLBACK (store_events_row_deleted), self);
   g_signal_connect (self->priv->store_events, "rows-reordered",
       G_CALLBACK (store_events_rows_reordered), self);
+  g_signal_connect (self->priv->store_events, "row-has-child-toggled",
+      G_CALLBACK (store_events_has_child_rows), self);
 
   // debug
   gtk_notebook_set_show_tabs (GTK_NOTEBOOK (self->priv->notebook), TRUE);