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// Copyright (c) 2009 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_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
#include <vector>
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/singleton.h"
#include "chrome/browser/tabs/tab_strip_model.h"
#include "chrome/common/notification_observer.h"
// The ExtensionBrowserEventRouter listens to Browser window & tab events
// and routes them to listeners inside extension process renderers.
// ExtensionBrowserEventRouter listens to *all* events, but will only route
// events from windows/tabs within a profile to extension processes in the same
// profile.
class ExtensionBrowserEventRouter : public TabStripModelObserver,
public NotificationObserver {
public:
// Get Browser-Global instance
static ExtensionBrowserEventRouter* GetInstance();
// Must be called once. Subsequent calls have no effect.
void Init();
// TabStripModelObserver
void TabInsertedAt(TabContents* contents, int index, bool foreground);
void TabClosingAt(TabContents* contents, int index);
void TabDetachedAt(TabContents* contents, int index);
void TabSelectedAt(TabContents* old_contents,
TabContents* new_contents,
int index,
bool user_gesture);
void TabMoved(TabContents* contents, int from_index, int to_index);
void TabChangedAt(TabContents* contents, int index, bool loading_only);
void TabStripEmpty();
// NotificationObserver
void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
// Construct and dispatch windows.onCreated event.
void BrowserOpened(Browser* browser);
// Construct and dispatch windows.onRemoved event.
void BrowserClosed(Browser* browser);
ExtensionBrowserEventRouter();
friend struct DefaultSingletonTraits<ExtensionBrowserEventRouter>;
bool initialized_;
// Maintain set of known tab ids, so we can distinguish between tab creation
// and tab insertion. Also used to not send tab-detached after tab-removed.
std::set<int> tab_ids_;
DISALLOW_COPY_AND_ASSIGN(ExtensionBrowserEventRouter);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
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