GTK: Implement omnibox DnD destination behavior.

chrome/browser/autocomplete/autocomplete_edit_view_gtk.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autocomplete/autocomplete_edit_view_gtk.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 
 #include "app/l10n_util.h"
@@ skipping 174 matching lines @@
                    G_CALLBACK(&HandleViewMoveCursorThunk), this);
   // Override the size request.  We want to keep the original height request
   // from the widget, since that's font dependent.  We want to ignore the width
   // so we don't force a minimum width based on the text length.
   g_signal_connect(text_view_, "size-request",
                    G_CALLBACK(&HandleViewSizeRequestThunk), this);
   g_signal_connect(text_view_, "populate-popup",
                    G_CALLBACK(&HandlePopulatePopupThunk), this);
   mark_set_handler_id_ = g_signal_connect(
       text_buffer_, "mark-set", G_CALLBACK(&HandleMarkSetThunk), this);
+  g_signal_connect(text_view_, "drag-data-received",
+                   G_CALLBACK(&HandleDragDataReceivedThunk), this);
 }
 
 void AutocompleteEditViewGtk::SetFocus() {
   gtk_widget_grab_focus(text_view_);
 }
 
 void AutocompleteEditViewGtk::SaveStateToTab(TabContents* tab) {
   DCHECK(tab);
   GetStateAccessor()->SetProperty(
       tab->property_bag(),
@@ skipping 459 matching lines @@
   }
 
   // If we have some previously-selected text but it's no longer highlighted
   // and we haven't saved it as the selection yet, we save it now.
   if (!selected_text_.empty() && no_text_selected && !selection_saved_) {
     SavePrimarySelection(selected_text_);
     selection_saved_ = true;
   }
 }
 
+// Just use the default behavior for DnD, except if the drop can be a PasteAndGo
+// then override.
+void AutocompleteEditViewGtk::HandleDragDataReceived(
+    GdkDragContext* context, gint x, gint y,
+    GtkSelectionData* selection_data, guint target_type, guint time) {
+  // Don't try to PasteAndGo on drops originating from this omnibox. However, do
+  // allow default behavior for such drags.
+  if (context->source_window == text_view_->window)
+    return;
+
+  guchar* text = gtk_selection_data_get_text(selection_data);
+  if (!text)
+    return;
+
+  std::wstring possible_url = UTF8ToWide(reinterpret_cast<char*>(text));
+  g_free(text);
+  if (model_->CanPasteAndGo(CollapseWhitespace(possible_url, true))) {
+    model_->PasteAndGo();
+    gtk_drag_finish(context, TRUE, TRUE, time);
+    g_signal_stop_emission_by_name(text_view_, "drag-data-received");
+  }
+}
+
 void AutocompleteEditViewGtk::SelectAllInternal(bool reversed,
                                                 bool update_primary_selection) {
   GtkTextIter start, end;
   if (reversed) {
     gtk_text_buffer_get_bounds(text_buffer_, &end, &start);
   } else {
     gtk_text_buffer_get_bounds(text_buffer_, &start, &end);
   }
   if (!update_primary_selection)
     StartUpdatingHighlightedText();
@@ skipping 119 matching lines @@
     const std::string& selected_text) {
   GtkClipboard* clipboard =
       gtk_widget_get_clipboard(text_view_, GDK_SELECTION_PRIMARY);
   DCHECK(clipboard);
   if (!clipboard)
     return;
 
   gtk_clipboard_set_text(
       clipboard, selected_text.data(), selected_text.size());
 }