content/public/renderer/render_view_observer.h

   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 #include "third_party/WebKit/public/web/WebIconURL.h"
  15
  16 class GURL;
  17
  18 namespace ppapi {
  19 namespace host {
  20 class PpapiHost;
  21 }
  22 }
  23
  24 namespace blink {
  25 class WebDataSource;
  26 class WebFrame;
  27 class WebFormElement;
  28 class WebGestureEvent;
  29 class WebLocalFrame;
  30 class WebMouseEvent;
  31 class WebNode;
  32 class WebTouchEvent;
  33 class WebURL;
  34 struct WebURLError;
  35 }
  36
  37 namespace content {
  38
  39 class RendererPpapiHost;
  40 class RenderView;
  41 class RenderViewImpl;
  42
  43 // Base class for objects that want to filter incoming IPCs, and also get
  44 // notified of changes to the frame.
  45 class 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, int world_id) {
  65   }
  66   virtual void DidCreateDocumentElement(blink::WebLocalFrame* frame) {}
  67   virtual void FrameCreated(blink::WebLocalFrame* parent,
  68                             blink::WebFrame* frame) {}
  69   virtual void FrameDetached(blink::WebFrame* frame) {}
  70   virtual void FrameWillClose(blink::WebFrame* frame) {}
  71   virtual void DidMatchCSS(
  72       blink::WebLocalFrame* frame,
  73       const blink::WebVector<blink::WebString>& newly_matching_selectors,
  74       const blink::WebVector<blink::WebString>& stopped_matching_selectors) {}
  75   virtual void WillSendSubmitEvent(blink::WebLocalFrame* frame,
  76                                    const blink::WebFormElement& form) {}
  77   virtual void WillSubmitForm(blink::WebLocalFrame* frame,
  78                               const blink::WebFormElement& form) {}
  79   virtual void DidCreateDataSource(blink::WebLocalFrame* frame,
  80                                    blink::WebDataSource* ds) {}
  81   virtual void PrintPage(blink::WebLocalFrame* frame, bool user_initiated) {}
  82   virtual void FocusedNodeChanged(const blink::WebNode& node) {}
  83   virtual void ZoomLevelChanged() {};
  84   virtual void DidChangeScrollOffset(blink::WebLocalFrame* frame) {}
  85   virtual void DraggableRegionsChanged(blink::WebFrame* frame) {}
  86   virtual void DidCommitCompositorFrame() {}
  87   virtual void DidUpdateLayout() {}
  88
  89   // These match the RenderView methods.
  90   virtual void DidHandleMouseEvent(const blink::WebMouseEvent& event) {}
  91   virtual void DidHandleTouchEvent(const blink::WebTouchEvent& event) {}
  92
  93   // Called when we receive a console message from WebKit for which we requested
  94   // extra details (like the stack trace). |message| is the error message,
  95   // |source| is the WebKit-reported source of the error (either external or
  96   // internal), and |stack_trace| is the stack trace of the error in a
  97   // human-readable format (each frame is formatted as
  98   // "\n    at function_name (source:line_number:column_number)").
  99   virtual void DetailedConsoleMessageAdded(const base::string16& message,
 100                                            const base::string16& source,
 101                                            const base::string16& stack_trace,
 102                                            int32 line_number,
 103                                            int32 severity_level) {}
 104
 105   // These match incoming IPCs.
 106   virtual void Navigate(const GURL& url) {}
 107   virtual void ClosePage() {}
 108   virtual void OrientationChangeEvent(int orientation) {}
 109
 110   virtual void OnStop() {}
 111
 112   // IPC::Listener implementation.
 113   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 114
 115   // IPC::Sender implementation.
 116   virtual bool Send(IPC::Message* message) OVERRIDE;
 117
 118   RenderView* render_view() const;
 119   int routing_id() const { return routing_id_; }
 120
 121  protected:
 122   explicit RenderViewObserver(RenderView* render_view);
 123   virtual ~RenderViewObserver();
 124
 125  private:
 126   friend class RenderViewImpl;
 127
 128   // This is called by the RenderView when it's going away so that this object
 129   // can null out its pointer.
 130   void RenderViewGone();
 131
 132   RenderView* render_view_;
 133   // The routing ID of the associated RenderView.
 134   int routing_id_;
 135
 136   DISALLOW_COPY_AND_ASSIGN(RenderViewObserver);
 137 };
 138
 139 }  // namespace content
 140
 141 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_H_