content/public/renderer/render_frame_observer.h

   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_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
   6 #define CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/strings/string16.h"
  11 #include "content/common/content_export.h"
  12 #include "ipc/ipc_listener.h"
  13 #include "ipc/ipc_sender.h"
  14 #include "v8/include/v8.h"
  15
  16 namespace blink {
  17 class WebFormElement;
  18 class WebFrame;
  19 class WebNode;
  20 struct WebURLError;
  21 }
  22
  23 namespace content {
  24
  25 class RendererPpapiHost;
  26 class RenderFrame;
  27 class RenderFrameImpl;
  28
  29 // Base class for objects that want to filter incoming IPCs, and also get
  30 // notified of changes to the frame.
  31 class CONTENT_EXPORT RenderFrameObserver : public IPC::Listener,
  32                                            public IPC::Sender {
  33  public:
  34   // By default, observers will be deleted when the RenderFrame goes away.  If
  35   // they want to outlive it, they can override this function.
  36   virtual void OnDestruct();
  37
  38   // Called when a Pepper plugin is created.
  39   virtual void DidCreatePepperPlugin(RendererPpapiHost* host) {}
  40
  41   // Called when a load is explicitly stopped by the user or browser.
  42   virtual void OnStop() {}
  43
  44   // Called when the RenderFrame visiblity is changed.
  45   virtual void WasHidden() {}
  46   virtual void WasShown() {}
  47
  48   // These match the Blink API notifications
  49   virtual void DidCommitProvisionalLoad(bool is_new_navigation,
  50                                         bool is_same_page_navigation) {}
  51   virtual void DidStartProvisionalLoad() {}
  52   virtual void DidFailProvisionalLoad(const blink::WebURLError& error) {}
  53   virtual void DidFinishLoad() {}
  54   virtual void DidFinishDocumentLoad() {}
  55   virtual void WillReleaseScriptContext(v8::Handle<v8::Context> context,
  56                                         int world_id) {}
  57   virtual void DidClearWindowObject() {}
  58   virtual void DidChangeManifest() {}
  59   virtual void DidChangeDefaultPresentation() {}
  60   virtual void DidChangeScrollOffset() {}
  61   virtual void WillSendSubmitEvent(const blink::WebFormElement& form) {}
  62   virtual void WillSubmitForm(const blink::WebFormElement& form) {}
  63
  64   // Called before FrameWillClose, when this frame has been detached from the
  65   // view, but has not been closed yet. This *will* be called when parent frames
  66   // are closing. NB: IPCs to the browser will fail silently by the time this
  67   // notification is sent.
  68   virtual void FrameDetached() {}
  69
  70   // Called when the frame will soon be closed. This is the last opportunity to
  71   // send messages to the host (e.g., for clean-up, shutdown, etc.). This is
  72   // *not* called on child frames when parent frames are being closed.
  73   virtual void FrameWillClose() {}
  74
  75   // Called when we receive a console message from Blink for which we requested
  76   // extra details (like the stack trace). |message| is the error message,
  77   // |source| is the Blink-reported source of the error (either external or
  78   // internal), and |stack_trace| is the stack trace of the error in a
  79   // human-readable format (each frame is formatted as
  80   // "\n    at function_name (source:line_number:column_number)").
  81   virtual void DetailedConsoleMessageAdded(const base::string16& message,
  82                                            const base::string16& source,
  83                                            const base::string16& stack_trace,
  84                                            int32 line_number,
  85                                            int32 severity_level) {}
  86
  87   // Called when a compositor frame has committed.
  88   virtual void DidCommitCompositorFrame() {}
  89
  90   // Called when the focused node has changed to |node|.
  91   virtual void FocusedNodeChanged(const blink::WebNode& node) {}
  92
  93   // IPC::Listener implementation.
  94   bool OnMessageReceived(const IPC::Message& message) override;
  95
  96   // IPC::Sender implementation.
  97   bool Send(IPC::Message* message) override;
  98
  99   RenderFrame* render_frame() const;
 100   int routing_id() const { return routing_id_; }
 101
 102  protected:
 103   explicit RenderFrameObserver(RenderFrame* render_frame);
 104   ~RenderFrameObserver() override;
 105
 106  private:
 107   friend class RenderFrameImpl;
 108
 109   // This is called by the RenderFrame when it's going away so that this object
 110   // can null out its pointer.
 111   void RenderFrameGone();
 112
 113   RenderFrame* render_frame_;
 114   // The routing ID of the associated RenderFrame.
 115   int routing_id_;
 116
 117   DISALLOW_COPY_AND_ASSIGN(RenderFrameObserver);
 118 };
 119
 120 }  // namespace content
 121
 122 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_