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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_HISTORY_HISTORY_TAB_HELPER_H_
#define CHROME_BROWSER_HISTORY_HISTORY_TAB_HELPER_H_
#pragma once
#include "base/memory/ref_counted.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/web_contents_observer.h"
class HistoryService;
class SkBitmap;
struct ThumbnailScore;
namespace history {
class HistoryAddPageArgs;
}
class HistoryTabHelper : public content::WebContentsObserver,
public content::NotificationObserver {
public:
explicit HistoryTabHelper(content::WebContents* web_contents);
virtual ~HistoryTabHelper();
// Updates history with the specified navigation. This is called by
// OnMsgNavigate to update history state.
void UpdateHistoryForNavigation(
scoped_refptr<history::HistoryAddPageArgs> add_page_args);
// Sends the page title to the history service. This is called when we receive
// the page title and we know we want to update history.
void UpdateHistoryPageTitle(const content::NavigationEntry& entry);
// Returns the history::HistoryAddPageArgs to use for adding a page to
// history.
scoped_refptr<history::HistoryAddPageArgs> CreateHistoryAddPageArgs(
const GURL& virtual_url,
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params);
private:
// content::WebContentsObserver implementation.
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) OVERRIDE;
virtual void DidNavigateAnyFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) OVERRIDE;
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
void OnPageContents(const GURL& url,
int32 page_id,
const string16& contents);
void OnThumbnail(const GURL& url,
const ThumbnailScore& score,
const SkBitmap& bitmap);
// Helper function to return the history service. May return NULL.
HistoryService* GetHistoryService();
// Whether we have a (non-empty) title for the current page.
// Used to prevent subsequent title updates from affecting history. This
// prevents some weirdness because some AJAXy apps use titles for status
// messages.
bool received_page_title_;
content::NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(HistoryTabHelper);
};
#endif // CHROME_BROWSER_HISTORY_HISTORY_TAB_HELPER_H_
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