[gtk+/places-sidebar] Actually use the drop_state, instead of encoding things in new_bookmark_index

[Federico Mena Quintero <federico src gnome org>]

commit 3083308d1cd6825604669b41639e94540a93b26d
Author: Federico Mena Quintero <federico gnome org>
Date:   Sat Apr 20 11:42:04 2013 -0400

    Actually use the drop_state, instead of encoding things in new_bookmark_index
    
    This lets us keep the new_bookmark_index untouched even when the drop state goes from armed to unarmed.
    That will in turn let us drop in the right place...
    
    Signed-off-by: Federico Mena Quintero <federico gnome org>

 gtk/gtkplacessidebar.c | 35 ++++++++++++++++++++++++-----------
 1 file changed, 24 insertions(+), 11 deletions(-)
---
diff --git a/gtk/gtkplacessidebar.c b/gtk/gtkplacessidebar.c
index 7982e0f..33acbfe 100644
--- a/gtk/gtkplacessidebar.c
+++ b/gtk/gtkplacessidebar.c
@@ -1420,14 +1420,15 @@ free_drag_data (GtkPlacesSidebar *sidebar)
 static void
 remove_drop_bookmark_feedback_row (GtkPlacesSidebar *sidebar)
 {
-       if (sidebar->new_bookmark_index != -1) {
+       if (sidebar->drop_state != DROP_STATE_NORMAL) {
                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;
+
+               sidebar->drop_state = DROP_STATE_NORMAL;
        }
 }
 
@@ -1460,22 +1461,31 @@ start_drop_feedback (GtkPlacesSidebar *sidebar, GtkTreePath *path, GtkTreeViewDr
        if (drop_as_bookmarks) {
                int new_bookmark_index;
                GtkTreePath *new_path;
+               gboolean need_feedback_row;
 
                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) {
-                       GtkTreeIter iter;
+               if (sidebar->drop_state == DROP_STATE_NORMAL)
+                       need_feedback_row = TRUE;
+               else {
+                       /* Feedback row already exists; remove it if its position needs to change */
+
+                       if (sidebar->new_bookmark_index == new_bookmark_index)
+                               need_feedback_row = FALSE;
+                       else {
+                               if (sidebar->new_bookmark_index < new_bookmark_index)
+                                       new_bookmark_index--; /* since the removal of the old feedback row 
pushed items one position up */
 
-                       if (sidebar->new_bookmark_index != -1
-                           && sidebar->new_bookmark_index < new_bookmark_index)
-                               new_bookmark_index--; /* since the removal of the old feedback row pushed 
items one position up */
+                               remove_drop_bookmark_feedback_row (sidebar);
+                               need_feedback_row = TRUE;
+                       }
+               }
 
-                       remove_drop_bookmark_feedback_row (sidebar);
+               if (need_feedback_row) {
+                       GtkTreeIter iter;
 
-                       /* 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,
@@ -1485,9 +1495,11 @@ start_drop_feedback (GtkPlacesSidebar *sidebar, GtkTreePath *path, GtkTreeViewDr
                                                           -1);
                }
 
-               new_path = gtk_tree_path_new_from_indices (new_bookmark_index, -1);
+               new_path = gtk_tree_path_new_from_indices (sidebar->new_bookmark_index, -1);
                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);
+
+               sidebar->drop_state = DROP_STATE_NEW_BOOKMARK_ARMED;
        } else
                gtk_tree_view_set_drag_dest_row (sidebar->tree_view, path, pos);
 }
@@ -1827,6 +1839,7 @@ drag_drop_callback (GtkTreeView *tree_view,
                    GtkPlacesSidebar *sidebar)
 {
        gboolean retval = FALSE;
+
        sidebar->drop_occured = TRUE;
        retval = get_drag_data (tree_view, context, time);
        g_signal_stop_emission_by_name (tree_view, "drag-drop");