Revert 110949 - views: Move widget/ directory to ui/views.

ui/views/widget/drop_target_gtk.h

-// Copyright (c) 2011 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.
-
-#ifndef UI_VIEWS_WIDGET_DROP_TARGET_GTK_H_
-#define UI_VIEWS_WIDGET_DROP_TARGET_GTK_H_
-#pragma once
-
-#include <gtk/gtk.h>
-#include <set>
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/base/dragdrop/os_exchange_data.h"
-#include "ui/views/widget/drop_helper.h"
-
-namespace ui {
-class OSExchangeDataProviderGtk;
-}
-using ui::OSExchangeData;
-using ui::OSExchangeDataProviderGtk;
-
-namespace views {
-
-class View;
-namespace internal {
-class RootView;
-}
-
-// DropTarget implementation for Gtk.
-//
-// The data for a drop is not immediately available on X. As such we lazily
-// ask for data as necessary. Some Views require data before they can determine
-// if the drop is going to be allowed. When such a View is encountered the
-// relevant data is requested from the drag source. When the data is available
-// the target is notified. Similarly if the drop completes and the data has
-// not yet been fetched, it is fetched and the target then notified.
-//
-// When a drop finishes this class calls back to the containing NativeWidgetGtk
-// which results in deleting the DropTargetGtk.
-class DropTargetGtk {
- public:
-  DropTargetGtk(internal::RootView* root_view, GdkDragContext* context);
-  ~DropTargetGtk();
-
-  // If a drag and drop is underway and |view| is the current drop target, the
-  // drop target is set to null.
-  // This is invoked when a View is removed from the RootView to make sure
-  // we don't target a view that was removed during dnd.
-  void ResetTargetViewIfEquals(View* view);
-
-  // Drop methods from Gtk. These are forwarded from the containing
-  // NativeWidgetGtk.
-  void OnDragDataReceived(GdkDragContext* context,
-                          gint x,
-                          gint y,
-                          GtkSelectionData* data,
-                          guint info,
-                          guint time);
-  gboolean OnDragDrop(GdkDragContext* context,
-                      gint x,
-                      gint y,
-                      guint time);
-  void OnDragLeave(GdkDragContext* context, guint time);
-  gboolean OnDragMotion(GdkDragContext* context,
-                        gint x,
-                        gint y,
-                        guint time);
-
- private:
-  // Invoked when the drop finishes AND all the data is available.
-  void FinishDrop(GdkDragContext* context, gint x, gint y, guint time);
-
-  // Returns in |f2| and |cf2| the intersection of |f1| |f2| and
-  // |cf1|, |cf2|.
-  void IntersectFormats(int f1, const std::set<GdkAtom>& cf1,
-                        int* f2, std::set<GdkAtom>* cf2);
-
-  // Requests the formats in |formats| and the custom formats in
-  // |custom_formats|.
-  void RequestFormats(GdkDragContext* context,
-                      int formats,
-                      const std::set<GdkAtom>& custom_formats,
-                      guint time);
-
-  // Reutrns the Provider of the OSExchangeData we created.
-  OSExchangeDataProviderGtk& data_provider() const;
-
-  // Manages sending the appropriate drop methods to the view the drop is over.
-  DropHelper helper_;
-
-  // The formats we've requested from the drag source.
-  //
-  // NOTE: these formats are the intersection of the formats requested by the
-  // drop target and the formats provided by the source.
-  int requested_formats_;
-  std::set<GdkAtom> requested_custom_formats_;
-
-  // The data.
-  scoped_ptr<OSExchangeData> data_;
-
-  // Are we waiting for data from the source before we can notify the view?
-  // This is set in two distinct ways: when the view requires the data before
-  // it can answer Can Drop (that is, AreDropTypesRequired returns true) and
-  // when the user dropped the data but we didn't get it all yet.
-  bool waiting_for_data_;
-
-  // Has OnDragDrop been invoked?
-  bool received_drop_;
-
-  // The view under the mouse. This is not necessarily the same as
-  // helper_.target_view(). The two differ if the view under the mouse requires
-  // the data.
-  View* pending_view_;
-
-  DISALLOW_COPY_AND_ASSIGN(DropTargetGtk);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_WIDGET_DROP_TARGET_GTK_H_