browser_root_view.h revision 4a5e2dc747d50c653511c68ccb2cfbfb740bd5a7 
1// Copyright (c) 2009 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_
6#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_
7#pragma once
8
9#include "views/widget/root_view.h"
10
11class BrowserView;
12class OSExchangeData;
13class BaseTabStrip;
14
15// RootView implementation used by BrowserFrame. This forwards drop events to
16// the TabStrip. Visually the tabstrip extends to the top of the frame, but in
17// actually it doesn't. The tabstrip is only as high as a tab. To enable
18// dropping above the tabstrip BrowserRootView forwards drop events to the
19// TabStrip.
20class BrowserRootView : public views::RootView {
21 public:
22  // You must call set_tabstrip before this class will accept drops.
23  BrowserRootView(BrowserView* browser_view, views::Widget* widget);
24
25  virtual bool GetDropFormats(
26      int* formats,
27      std::set<OSExchangeData::CustomFormat>* custom_formats);
28  virtual bool AreDropTypesRequired();
29  virtual bool CanDrop(const OSExchangeData& data);
30  virtual void OnDragEntered(const views::DropTargetEvent& event);
31  virtual int OnDragUpdated(const views::DropTargetEvent& event);
32  virtual void OnDragExited();
33  virtual int OnPerformDrop(const views::DropTargetEvent& event);
34
35 private:
36  // Returns true if the event should be forwarded to the tabstrip.
37  bool ShouldForwardToTabStrip(const views::DropTargetEvent& event);
38
39  // Converts the event from the hosts coordinate system to the tabstrips
40  // coordinate system.
41  views::DropTargetEvent* MapEventToTabStrip(
42      const views::DropTargetEvent& event,
43      const OSExchangeData& data);
44
45  inline BaseTabStrip* tabstrip() const;
46
47  // Returns true if |data| has string contents and the user can "paste and go".
48  // If |url| is non-NULL and the user can "paste and go", |url| is set to the
49  // desired destination.
50  bool GetPasteAndGoURL(const OSExchangeData& data, GURL* url);
51
52  // The BrowserView.
53  BrowserView* browser_view_;
54
55  // If true, drag and drop events are being forwarded to the tab strip.
56  // This is used to determine when to send OnDragEntered and OnDragExited
57  // to the tab strip.
58  bool forwarding_to_tab_strip_;
59
60  DISALLOW_COPY_AND_ASSIGN(BrowserRootView);
61};
62
63#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_
64