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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.
#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_
#pragma once
#include "base/observer_list.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
class ExtensionsService;
class PrefService;
// Model for the browser actions toolbar.
class ExtensionToolbarModel : public NotificationObserver {
public:
explicit ExtensionToolbarModel(ExtensionsService* service);
~ExtensionToolbarModel();
// Notifies the toolbar model that the Profile that suplied its
// prefs is being destroyed.
void DestroyingProfile();
// A class which is informed of changes to the model; represents the view of
// MVC.
class Observer {
public:
// An extension with a browser action button has been added, and should go
// in the toolbar at |index|.
virtual void BrowserActionAdded(Extension* extension, int index) {}
// The browser action button for |extension| should no longer show.
virtual void BrowserActionRemoved(Extension* extension) {}
// The browser action button for |extension| has been moved to |index|.
virtual void BrowserActionMoved(Extension* extension, int index) {}
// Called when the model has finished loading.
virtual void ModelLoaded() {}
protected:
virtual ~Observer() {}
};
// Functions called by the view.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
void MoveBrowserAction(Extension* extension, int index);
// If count == size(), this will set the visible icon count to -1, meaning
// "show all actions".
void SetVisibleIconCount(int count);
// As above, a return value of -1 represents "show all actions".
int GetVisibleIconCount() { return visible_icon_count_; }
bool extensions_initialized() const { return extensions_initialized_; }
size_t size() const {
return toolitems_.size();
}
ExtensionList::iterator begin() {
return toolitems_.begin();
}
ExtensionList::iterator end() {
return toolitems_.end();
}
Extension* GetExtensionByIndex(int index) const;
// Utility functions for converting between an index into the list of
// incognito-enabled browser actions, and the list of all browser actions.
int IncognitoIndexToOriginal(int incognito_index);
int OriginalIndexToIncognito(int original_index);
private:
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
// To be called after the extension service is ready; gets loaded extensions
// from the extension service and their saved order from the pref service
// and constructs |toolitems_| from these data.
void InitializeExtensionList();
// Save the model to prefs.
void UpdatePrefs();
// Our observers.
ObserverList<Observer> observers_;
void AddExtension(Extension* extension);
void RemoveExtension(Extension* extension);
// Our ExtensionsService, guaranteed to outlive us.
ExtensionsService* service_;
PrefService* prefs_;
// True if we've handled the initial EXTENSIONS_READY notification.
bool extensions_initialized_;
// Ordered list of browser action buttons.
ExtensionList toolitems_;
// Keeps track of what the last extension to get disabled was.
std::string last_extension_removed_;
// Keeps track of where the last extension to get disabled was in the list.
size_t last_extension_removed_index_;
// The number of icons visible (the rest should be hidden in the overflow
// chevron).
int visible_icon_count_;
NotificationRegistrar registrar_;
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_
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