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// Copyright (c) 2006-2008 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_ALTERNATE_NAV_URL_FETCHER_H_
#define CHROME_BROWSER_ALTERNATE_NAV_URL_FETCHER_H_
#include <string>
#include "chrome/browser/net/url_fetcher.h"
#include "chrome/browser/tab_contents/infobar_delegate.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
class NavigationController;
// Attempts to get the HEAD of a host name and displays an info bar if the
// request was successful. This is used for single-word queries where we can't
// tell if the entry was a search or an intranet hostname. The autocomplete bar
// assumes it's a query and issues an AlternateNavURLFetcher to display a "did
// you mean" infobar suggesting a navigation.
//
// The memory management of this object is a bit tricky. The location bar view
// will create us and be responsible for us until we attach as an observer
// after a pending load starts (it will delete us if this doesn't happen).
// Once this pending load starts, we're responsible for deleting ourselves.
// We'll do this when the load commits, or when the navigation controller
// itself is deleted.
class AlternateNavURLFetcher : public NotificationObserver,
public URLFetcher::Delegate,
public LinkInfoBarDelegate {
public:
enum State {
NOT_STARTED,
IN_PROGRESS,
SUCCEEDED,
FAILED,
};
explicit AlternateNavURLFetcher(const GURL& alternate_nav_url);
State state() const { return state_; }
// NotificationObserver
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
// URLFetcher::Delegate
virtual void OnURLFetchComplete(const URLFetcher* source,
const GURL& url,
const URLRequestStatus& status,
int response_code,
const ResponseCookies& cookies,
const std::string& data);
// LinkInfoBarDelegate
virtual std::wstring GetMessageTextWithOffset(size_t* link_offset) const;
virtual std::wstring GetLinkText() const;
virtual SkBitmap* GetIcon() const;
virtual bool LinkClicked(WindowOpenDisposition disposition);
virtual void InfoBarClosed();
private:
// Displays the infobar if all conditions are met (the page has loaded and
// the fetch of the alternate URL succeeded).
void ShowInfobarIfPossible();
GURL alternate_nav_url_;
scoped_ptr<URLFetcher> fetcher_;
NavigationController* controller_;
State state_;
bool navigated_to_entry_;
// The TabContents the InfoBarDelegate was added to.
TabContents* infobar_contents_;
NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(AlternateNavURLFetcher);
};
#endif // CHROME_BROWSER_ALTERNATE_NAV_URL_FETCHER_H_
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