[gthumb] ask confirmation before moving files with a drag&drop operation

[Paolo Bacchilega <paobac src gnome org>]

commit 95b1be4a01aa9587a2de0d97e4dd87d01ab05952
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Mar 2 18:32:20 2015 +0100

    ask confirmation before moving files with a drag&drop operation

 extensions/file_manager/callbacks.c |   46 ++++++++++++++++++++++++++++++++--
 1 files changed, 43 insertions(+), 3 deletions(-)
---
diff --git a/extensions/file_manager/callbacks.c b/extensions/file_manager/callbacks.c
index a6d5edf..5b3936e 100644
--- a/extensions/file_manager/callbacks.c
+++ b/extensions/file_manager/callbacks.c
@@ -698,7 +698,9 @@ fm__gth_browser_folder_tree_drag_data_received_cb (GthBrowser    *browser,
                                                   GdkDragAction  action)
 {
        GthFileSource *file_source;
+       GtkWidget     *dialog;
        GthTask       *task;
+       int            response;
 
        if (destination == NULL)
                return;
@@ -707,10 +709,48 @@ fm__gth_browser_folder_tree_drag_data_received_cb (GthBrowser    *browser,
        if (file_source == NULL)
                return;
 
-       if ((action == GDK_ACTION_MOVE) && ! gth_file_source_can_cut (file_source, (GFile *) 
file_list->data)) {
-               GtkWidget *dialog;
-               int        response;
+       /* ask confirmation */
+
+       response = GTK_RESPONSE_OK;
+       if ((action == GDK_ACTION_MOVE) || (action == GDK_ACTION_COPY)) {
+               int   n_files;
+               char *message;
+
+               n_files = g_list_length (file_list);
+               g_return_if_fail (n_files >= 1);
 
+               if (n_files == 1) {
+                       char *filename = _g_file_get_display_name ((GFile *) file_list->data);
+                       if (action == GDK_ACTION_MOVE)
+                               message = g_strdup_printf (_("Do you want to move \"%s\" to \"%s\" ?"), 
filename, g_file_info_get_display_name (destination->info));
+                       else
+                               message = g_strdup_printf (_("Do you want to copy \"%s\" to \"%s\" ?"), 
filename, g_file_info_get_display_name (destination->info));
+                       g_free (filename);
+               }
+               else {
+                       if (action == GDK_ACTION_MOVE)
+                               message = g_strdup_printf (_("Do you want to move the dragged files to \"%s\" 
?"), g_file_info_get_display_name (destination->info));
+                       else
+                               message = g_strdup_printf (_("Do you want to copy the dragged files to \"%s\" 
?"), g_file_info_get_display_name (destination->info));
+               }
+               dialog = _gtk_message_dialog_new (GTK_WINDOW (browser),
+                                                 GTK_DIALOG_MODAL,
+                                                 _GTK_ICON_NAME_DIALOG_QUESTION,
+                                                 message,
+                                                 NULL,
+                                                 _GTK_LABEL_CANCEL, GTK_RESPONSE_CANCEL,
+                                                 ((action == GDK_ACTION_MOVE) ? _("Move") : _("_Copy")), 
GTK_RESPONSE_OK,
+                                                 NULL);
+               response = gtk_dialog_run (GTK_DIALOG (dialog));
+               gtk_widget_destroy (dialog);
+
+               g_free (message);
+       }
+
+       if (response != GTK_RESPONSE_OK)
+               return;
+
+       if ((action == GDK_ACTION_MOVE) && ! gth_file_source_can_cut (file_source, (GFile *) 
file_list->data)) {
                dialog = _gtk_message_dialog_new (GTK_WINDOW (browser),
                                                  GTK_DIALOG_MODAL,
                                                  _GTK_ICON_NAME_DIALOG_QUESTION,