render_view_observer.h revision 1320f92c476a1ad9d19dba2a48c72b75566198e9 
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/platform/WebVector.h"
14
15class GURL;
16
17namespace ppapi {
18namespace host {
19class PpapiHost;
20}
21}
22
23namespace blink {
24class WebDataSource;
25class WebFrame;
26class WebFormElement;
27class WebGestureEvent;
28class WebLocalFrame;
29class WebMouseEvent;
30class WebNode;
31class WebString;
32class WebTouchEvent;
33class WebURL;
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(blink::WebLocalFrame* frame) {}
56  virtual void DidFailLoad(blink::WebLocalFrame* frame,
57                           const blink::WebURLError& error) {}
58  virtual void DidFinishLoad(blink::WebLocalFrame* frame) {}
59  virtual void DidStartProvisionalLoad(blink::WebLocalFrame* frame) {}
60  virtual void DidFailProvisionalLoad(blink::WebLocalFrame* frame,
61                                      const blink::WebURLError& error) {}
62  virtual void DidCommitProvisionalLoad(blink::WebLocalFrame* frame,
63                                        bool is_new_navigation) {}
64  virtual void DidClearWindowObject(blink::WebLocalFrame* frame) {}
65  virtual void DidCreateDocumentElement(blink::WebLocalFrame* frame) {}
66  virtual void FrameCreated(blink::WebLocalFrame* parent,
67                            blink::WebFrame* frame) {}
68  virtual void FrameDetached(blink::WebFrame* frame) {}
69  virtual void FrameWillClose(blink::WebFrame* frame) {}
70  virtual void DidMatchCSS(
71      blink::WebLocalFrame* frame,
72      const blink::WebVector<blink::WebString>& newly_matching_selectors,
73      const blink::WebVector<blink::WebString>& stopped_matching_selectors) {}
74  virtual void WillSendSubmitEvent(blink::WebLocalFrame* frame,
75                                   const blink::WebFormElement& form) {}
76  virtual void WillSubmitForm(blink::WebLocalFrame* frame,
77                              const blink::WebFormElement& form) {}
78  virtual void DidCreateDataSource(blink::WebLocalFrame* frame,
79                                   blink::WebDataSource* ds) {}
80  virtual void PrintPage(blink::WebLocalFrame* frame, bool user_initiated) {}
81  virtual void FocusedNodeChanged(const blink::WebNode& node) {}
82  virtual void DidChangeScrollOffset(blink::WebLocalFrame* frame) {}
83  virtual void DraggableRegionsChanged(blink::WebFrame* frame) {}
84  virtual void DidCommitCompositorFrame() {}
85  virtual void DidUpdateLayout() {}
86
87  // These match the RenderView methods.
88  virtual void DidHandleMouseEvent(const blink::WebMouseEvent& event) {}
89  virtual void DidHandleTouchEvent(const blink::WebTouchEvent& event) {}
90  virtual void DidHandleGestureEvent(const blink::WebGestureEvent& event) {}
91
92  // These match incoming IPCs.
93  virtual void Navigate(const GURL& url) {}
94  virtual void ClosePage() {}
95  virtual void OrientationChangeEvent() {}
96  virtual void Resized() {}
97
98  virtual void OnStop() {}
99
100  // IPC::Listener implementation.
101  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
102
103  // IPC::Sender implementation.
104  virtual bool Send(IPC::Message* message) OVERRIDE;
105
106  RenderView* render_view() const;
107  int routing_id() const { return routing_id_; }
108
109 protected:
110  explicit RenderViewObserver(RenderView* render_view);
111  virtual ~RenderViewObserver();
112
113  // Sets |render_view_| to track.
114  // Removes itself of previous (if any) |render_view_| observer list and adds
115  // to the new |render_view|. Since it assumes that observer outlives
116  // render_view, OnDestruct should be overridden.
117  void Observe(RenderView* render_view);
118
119 private:
120  friend class RenderViewImpl;
121
122  // This is called by the RenderView when it's going away so that this object
123  // can null out its pointer.
124  void RenderViewGone();
125
126  RenderView* render_view_;
127  // The routing ID of the associated RenderView.
128  int routing_id_;
129
130  DISALLOW_COPY_AND_ASSIGN(RenderViewObserver);
131};
132
133}  // namespace content
134
135#endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_
136