1// Copyright 2013 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 CONTENT_RENDERER_RESIZING_MODE_SELECTOR_H_
6#define CONTENT_RENDERER_RESIZING_MODE_SELECTOR_H_
7
8#include "base/basictypes.h"
9
10struct ViewMsg_Resize_Params;
11
12namespace content {
13
14class RenderWidget;
15
16// Enables switching between two modes of resizing:
17// 1) The "normal" (asynchronous) resizing, which involves sending messages to
18//    and receiving them from host; and
19// 2) The synchronous mode, which short-circuits the resizing logic to operate
20//    strictly inside renderer.
21// The latter is necessary to support a handful of layout tests that were
22// written with the expectation of a synchronous resize, and we're going to
23// eventually rewrite or remove all of them. See http://crbug.com/309760 for
24// details.
25class ResizingModeSelector {
26 public:
27  ResizingModeSelector();
28  bool NeverUsesSynchronousResize() const;
29  bool ShouldAbortOnResize(RenderWidget* widget,
30                           const ViewMsg_Resize_Params& params);
31
32  void set_is_synchronous_mode(bool mode);
33  bool is_synchronous_mode() const;
34
35 private:
36  bool is_synchronous_mode_;
37
38  DISALLOW_COPY_AND_ASSIGN(ResizingModeSelector);
39};
40
41}  // namespace content
42
43#endif  // CONTENT_RENDERER_RESIZING_MODE_SELECTOR_H_
44