Revise completion to react on paste/ cursor/ backspace

We need to avoid updating the real text afterall, but update it
in the event of a cursor movement.

We also need to trigger completion on backspace or paste.

We need to remove the timer when we popdown completion.

We need to make sure to not show completion for empty text.

midori/midori-locationaction.c

@@ -354,6 +354,19 @@ midori_location_action_popup_timeout_cb (gpointer data)
     if (!gtk_widget_has_focus (action->entry))
         return FALSE;
 
+    if (!*action->key)
+    {
+        const gchar* uri = gtk_entry_get_text (GTK_ENTRY (action->entry));
+        #if HAVE_SQLITE
+        katze_assign (action->key, g_strdup (uri));
+        #else
+        katze_assign (action->key, katze_collfold (uri));
+        #endif
+    }
+
+    if (!(action->key && *action->key))
+        return FALSE;
+
     if (G_UNLIKELY (!action->popup))
     {
         GtkWidget* popup;
@@ -405,16 +418,6 @@ midori_location_action_popup_timeout_cb (gpointer data)
             G_CALLBACK (gtk_widget_destroyed), &action->popup);
     }
 
-    if (!*action->key)
-    {
-        const gchar* uri = gtk_entry_get_text (GTK_ENTRY (action->entry));
-        #if HAVE_SQLITE
-        katze_assign (action->key, g_strdup (uri));
-        #else
-        katze_assign (action->key, katze_collfold (uri));
-        #endif
-    }
-
     #if HAVE_SQLITE
     store = GTK_LIST_STORE (model);
     gtk_list_store_clear (store);
@@ -504,7 +507,11 @@ midori_location_action_popdown_completion (MidoriLocationAction* location_action
         gtk_tree_selection_unselect_all (gtk_tree_view_get_selection (
             GTK_TREE_VIEW (location_action->treeview)));
     }
+    if (location_action->completion_timeout)
+    {
+        g_source_remove (location_action->completion_timeout);
         location_action->completion_timeout = 0;
+    }
     location_action->completion_index = -1;
 }
 
@@ -843,6 +850,36 @@ midori_location_action_changed_cb (GtkEntry*             entry,
     katze_assign (location_action->text, g_strdup (gtk_entry_get_text (entry)));
 }
 
+static void
+midori_location_action_move_cursor_cb (GtkEntry*             entry,
+                                       GtkMovementStep       step,
+                                       gint                  count,
+                                       gboolean              extend_selection,
+                                       MidoriLocationAction* action)
+{
+    gchar* text = g_strdup (pango_layout_get_text (gtk_entry_get_layout (entry)));
+    /* Update entry with the completed text */
+    gtk_entry_set_text (entry, text);
+    g_free (text);
+    midori_location_action_popdown_completion (action);
+}
+
+static void
+midori_location_action_backspace_cb (GtkWidget*            entry,
+                                     MidoriLocationAction* action)
+{
+    midori_location_action_popup_completion (action, entry, "");
+    action->completion_index = -1;
+}
+
+static void
+midori_location_action_paste_clipboard_cb (GtkWidget*            entry,
+                                           MidoriLocationAction* action)
+{
+    midori_location_action_popup_completion (action, entry, "");
+    action->completion_index = -1;
+}
+
 static gboolean
 midori_location_action_button_press_event_cb (GtkEntry*             entry,
                                               GdkEventKey*          event,
@@ -911,6 +948,8 @@ midori_location_action_key_press_event_cb (GtkEntry*    entry,
         if (location_action->popup && GTK_WIDGET_VISIBLE (location_action->popup))
         {
             midori_location_action_popdown_completion (location_action);
+            text = gtk_entry_get_text (entry);
+            pango_layout_set_text (gtk_entry_get_layout (entry), text, -1);
             return TRUE;
         }
 
@@ -955,7 +994,8 @@ midori_location_action_key_press_event_cb (GtkEntry*    entry,
             {
                 gchar* uri;
                 gtk_tree_model_get (model, &iter, URI_COL, &uri, -1);
-                gtk_entry_set_text (entry, uri);
+                /* Update the layout without actually changing the text */
+                pango_layout_set_text (gtk_entry_get_layout (entry), uri, -1);
                 g_free (uri);
             }
             location_action->completion_index = selected;
@@ -1446,6 +1486,12 @@ midori_location_action_connect_proxy (GtkAction* action,
         g_object_connect (child,
                       "signal::changed",
                       midori_location_action_changed_cb, action,
+                      "signal::move-cursor",
+                      midori_location_action_move_cursor_cb, action,
+                      "signal::backspace",
+                      midori_location_action_backspace_cb, action,
+                      "signal::paste-clipboard",
+                      midori_location_action_paste_clipboard_cb, action,
                       "signal::button-press-event",
                       midori_location_action_button_press_event_cb, action,
                       "signal::key-press-event",