render_view_observer.h revision a36e5920737c6adbddd3e43b760e5de8431db6e0 
1// Copyright (c) 2012 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_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_
6#define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_
7
8#include "base/basictypes.h"
9#include "base/compiler_specific.h"
10#include "content/common/content_export.h"
11#include "ipc/ipc_listener.h"
12#include "ipc/ipc_sender.h"
13#include "third_party/WebKit/public/web/WebIconURL.h"
14
15class GURL;
16
17namespace ppapi {
18namespace host {
19class PpapiHost;
20}
21}
22
23namespace WebKit {
24class WebDataSource;
25class WebFrame;
26class WebFormElement;
27class WebGestureEvent;
28class WebMediaPlayerClient;
29class WebMouseEvent;
30class WebNode;
31class WebTouchEvent;
32class WebURL;
33struct WebContextMenuData;
34struct WebURLError;
35}
36
37namespace content {
38
39class RendererPpapiHost;
40class RenderView;
41class RenderViewImpl;
42
43// Base class for objects that want to filter incoming IPCs, and also get
44// notified of changes to the frame.
45class CONTENT_EXPORT RenderViewObserver : public IPC::Listener,
46                                          public IPC::Sender {
47 public:
48  // By default, observers will be deleted when the RenderView goes away.  If
49  // they want to outlive it, they can override this function.
50  virtual void OnDestruct();
51
52  // These match the WebKit API notifications
53  virtual void DidStartLoading() {}
54  virtual void DidStopLoading() {}
55  virtual void DidFinishDocumentLoad(WebKit::WebFrame* frame) {}
56  virtual void DidFailLoad(WebKit::WebFrame* frame,
57                           const WebKit::WebURLError& error) {}
58  virtual void DidFinishLoad(WebKit::WebFrame* frame) {}
59  virtual void DidStartProvisionalLoad(WebKit::WebFrame* frame) {}
60  virtual void DidFailProvisionalLoad(WebKit::WebFrame* frame,
61                                      const WebKit::WebURLError& error) {}
62  virtual void DidCommitProvisionalLoad(WebKit::WebFrame* frame,
63                                        bool is_new_navigation) {}
64  virtual void DidClearWindowObject(WebKit::WebFrame* frame) {}
65  virtual void DidCreateDocumentElement(WebKit::WebFrame* frame) {}
66  virtual void FrameCreated(WebKit::WebFrame* parent,
67                            WebKit::WebFrame* frame) {}
68  virtual void FrameDetached(WebKit::WebFrame* frame) {}
69  virtual void FrameWillClose(WebKit::WebFrame* frame) {}
70  virtual void WillSubmitForm(WebKit::WebFrame* frame,
71                              const WebKit::WebFormElement& form) {}
72  virtual void DidCreateDataSource(WebKit::WebFrame* frame,
73                                   WebKit::WebDataSource* ds) {}
74  virtual void PrintPage(WebKit::WebFrame* frame, bool user_initiated) {}
75  virtual void FocusedNodeChanged(const WebKit::WebNode& node) {}
76  virtual void WillCreateMediaPlayer(WebKit::WebFrame* frame,
77                                     WebKit::WebMediaPlayerClient* client) {}
78  virtual void ZoomLevelChanged() {};
79  virtual void DidChangeScrollOffset(WebKit::WebFrame* frame) {}
80  virtual void DraggableRegionsChanged(WebKit::WebFrame* frame) {}
81  virtual void DidRequestShowContextMenu(
82      WebKit::WebFrame* frame,
83      const WebKit::WebContextMenuData& data) {}
84  virtual void DidCommitCompositorFrame() {}
85
86  // These match the RenderView methods.
87  virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event) {}
88  virtual void DidHandleTouchEvent(const WebKit::WebTouchEvent& event) {}
89  virtual void DidHandleGestureEvent(const WebKit::WebGestureEvent& event) {}
90  virtual void DidCreatePepperPlugin(RendererPpapiHost* host) {}
91
92  // These match incoming IPCs.
93  virtual void Navigate(const GURL& url) {}
94  virtual void ClosePage() {}
95
96  // IPC::Listener implementation.
97  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
98
99  // IPC::Sender implementation.
100  virtual bool Send(IPC::Message* message) OVERRIDE;
101
102  RenderView* render_view() const;
103  int routing_id() const { return routing_id_; }
104
105 protected:
106  explicit RenderViewObserver(RenderView* render_view);
107  virtual ~RenderViewObserver();
108
109 private:
110  friend class RenderViewImpl;
111
112  // This is called by the RenderView when it's going away so that this object
113  // can null out its pointer.
114  void RenderViewGone();
115
116  RenderView* render_view_;
117  // The routing ID of the associated RenderView.
118  int routing_id_;
119
120  DISALLOW_COPY_AND_ASSIGN(RenderViewObserver);
121};
122
123}  // namespace content
124
125#endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_
126