[gtk+/places-sidebar: 536/539] Add a temporary row for feedback when inserting a bookmark is possible

[Federico Mena Quintero <federico src gnome org>]

commit bc0a9a33b0dfa323728590fe6bcbe0815db6d7a8
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Apr 19 15:03:17 2013 -0500

    Add a temporary row for feedback when inserting a bookmark is possible
    
    We'll prettify this gradually.
    
    Signed-off-by: Federico Mena Quintero <federico gnome org>

 gtk/gtkplacessidebar.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkplacessidebar.c b/gtk/gtkplacessidebar.c
index 1e47848..2be9b97 100644
--- a/gtk/gtkplacessidebar.c
+++ b/gtk/gtkplacessidebar.c
@@ -218,6 +218,7 @@ typedef enum {
        PLACES_MOUNTED_VOLUME,
        PLACES_BOOKMARK,
        PLACES_HEADING,
+       PLACES_DROP_FEEDBACK
 } PlaceType;
 
 typedef enum {
@@ -1409,14 +1410,59 @@ free_drag_data (GtkPlacesSidebar *sidebar)
 }
 
 static void
+remove_drop_bookmark_feedback_row (GtkPlacesSidebar *sidebar)
+{
+       if (sidebar->new_bookmark_index != -1) {
+               gboolean success;
+               GtkTreeIter iter;
+
+               success = gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (sidebar->store), &iter, NULL, 
sidebar->new_bookmark_index);
+               g_assert (success);
+               gtk_list_store_remove (sidebar->store, &iter);
+               sidebar->new_bookmark_index = -1;
+       }
+}
+
+static void
 start_drop_feedback (GtkPlacesSidebar *sidebar, GtkTreePath *path, GtkTreeViewDropPosition pos, gboolean 
drop_as_bookmarks)
 {
-       gtk_tree_view_set_drag_dest_row (sidebar->tree_view, path, pos);
+       if (drop_as_bookmarks) {
+               int new_bookmark_index;
+               GtkTreeIter iter;
+
+               g_assert (pos == GTK_TREE_VIEW_DROP_BEFORE || pos == GTK_TREE_VIEW_DROP_AFTER);
+
+               new_bookmark_index = gtk_tree_path_get_indices (path)[0];
+
+               if (pos == GTK_TREE_VIEW_DROP_AFTER)
+                       new_bookmark_index++;
+
+               if (sidebar->new_bookmark_index != new_bookmark_index) {
+                       GtkTreePath *new_path;
+
+                       remove_drop_bookmark_feedback_row (sidebar);
+
+                       /* Insert the new feedback row */
+                       sidebar->new_bookmark_index = new_bookmark_index;
+                       gtk_list_store_insert_with_values (sidebar->store, &iter, sidebar->new_bookmark_index,
+                                                          PLACES_SIDEBAR_COLUMN_ROW_TYPE, 
PLACES_DROP_FEEDBACK,
+                                                          PLACES_SIDEBAR_COLUMN_SECTION_TYPE, 
SECTION_BOOKMARKS,
+                                                          PLACES_SIDEBAR_COLUMN_NAME, _("New bookmark"),
+                                                          PLACES_SIDEBAR_COLUMN_NO_EJECT, TRUE,
+                                                          -1);
+
+                       new_path = gtk_tree_model_get_path (GTK_TREE_MODEL (sidebar->store), &iter);
+                       gtk_tree_view_set_drag_dest_row (sidebar->tree_view, new_path, 
GTK_TREE_VIEW_DROP_INTO_OR_BEFORE);
+                       gtk_tree_path_free (new_path);
+               }
+       } else
+               gtk_tree_view_set_drag_dest_row (sidebar->tree_view, path, pos);
 }
 
 static void
 stop_drop_feedback (GtkPlacesSidebar *sidebar)
 {
+       remove_drop_bookmark_feedback_row (sidebar);
        gtk_tree_view_set_drag_dest_row (sidebar->tree_view, NULL, 0);
 }
 
@@ -1523,7 +1569,7 @@ drag_leave_callback (GtkTreeView *tree_view,
                     GtkPlacesSidebar *sidebar)
 {
        free_drag_data (sidebar);
-       gtk_tree_view_set_drag_dest_row (tree_view, NULL, 0);
+       stop_drop_feedback (sidebar);
        g_signal_stop_emission_by_name (tree_view, "drag-leave");
 }