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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_OBSERVER_H_
#define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_OBSERVER_H_
#include "chrome/browser/tab_contents/navigation_controller.h"
#include "ipc/ipc_channel.h"
struct ViewHostMsg_FrameNavigate_Params;
// An observer API implemented by classes which are interested in various page
// load events from TabContents. They also get a chance to filter IPC messages.
class TabContentsObserver : public IPC::Channel::Listener {
public:
virtual void NavigateToPendingEntry() { }
virtual void DidNavigateMainFramePostCommit(
const NavigationController::LoadCommittedDetails& details,
const ViewHostMsg_FrameNavigate_Params& params) { }
virtual void DidNavigateAnyFramePostCommit(
const NavigationController::LoadCommittedDetails& details,
const ViewHostMsg_FrameNavigate_Params& params) { }
virtual void DidStartLoading() { }
virtual void DidStopLoading() { }
#if 0
// For unifying with delegate...
// Notifies the delegate that this contents is starting or is done loading
// some resource. The delegate should use this notification to represent
// loading feedback. See TabContents::is_loading()
virtual void LoadingStateChanged(TabContents* contents) { }
// Called to inform the delegate that the tab content's navigation state
// changed. The |changed_flags| indicates the parts of the navigation state
// that have been updated, and is any combination of the
// |TabContents::InvalidateTypes| bits.
virtual void NavigationStateChanged(const TabContents* source,
unsigned changed_flags) { }
#endif
protected:
TabContentsObserver(TabContents* tab_contents);
virtual ~TabContentsObserver();
// IPC::Channel::Listener implementation.
virtual bool OnMessageReceived(const IPC::Message& message);
// IPC::Message::Sender implementation.
virtual bool Send(IPC::Message* message);
TabContents* tab_contents() { return tab_contents_; }
int routing_id() { return routing_id_; }
private:
friend class TabContents;
void set_tab_contents(TabContents* tc) { tab_contents_ = tc; }
TabContents* tab_contents_;
// The routing ID of the associated TabContents.
int routing_id_;
DISALLOW_COPY_AND_ASSIGN(TabContentsObserver);
};
#endif // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_OBSERVER_H_
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