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// Copyright (c) 2010 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.
// Defines the Chrome Extensions WebNavigation API functions for observing and
// intercepting navigation events, as specified in
// chrome/common/extensions/api/extension_api.json.
#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBNAVIGATION_API_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBNAVIGATION_API_H_
#pragma once
#include "base/singleton.h"
#include "chrome/browser/extensions/extension_function.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
#include "googleurl/src/gurl.h"
class NavigationController;
class ProvisionalLoadDetails;
// Observes navigation notifications and routes them as events to the extension
// system.
class ExtensionWebNavigationEventRouter : public NotificationObserver {
public:
// Single instance of the event router.
static ExtensionWebNavigationEventRouter* GetInstance();
void Init();
private:
friend struct DefaultSingletonTraits<ExtensionWebNavigationEventRouter>;
ExtensionWebNavigationEventRouter() {}
virtual ~ExtensionWebNavigationEventRouter() {}
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
// Handler for the FRAME_PROVISIONAL_LOAD_START event. The method takes the
// details of such an event and constructs a suitable JSON formatted extension
// event from it.
void FrameProvisionalLoadStart(NavigationController* controller,
ProvisionalLoadDetails* details);
// Handler for the FRAME_PROVISIONAL_LOAD_COMMITTED event. The method takes
// the details of such an event and constructs a suitable JSON formatted
// extension event from it.
void FrameProvisionalLoadCommitted(NavigationController* controller,
ProvisionalLoadDetails* details);
// Handler for the FAIL_PROVISIONAL_LOAD_WITH_ERROR event. The method takes
// the details of such an event and constructs a suitable JSON formatted
// extension event from it.
void FailProvisionalLoadWithError(NavigationController* controller,
ProvisionalLoadDetails* details);
// This method dispatches events to the extension message service.
void DispatchEvent(Profile* context,
const char* event_name,
const std::string& json_args);
// Used for tracking registrations to navigation notifications.
NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(ExtensionWebNavigationEventRouter);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBNAVIGATION_API_H_
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