// 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_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 "content/common/notification_observer.h" #include "content/common/notification_registrar.h" class ExtensionService; class PrefService; // Model for the browser actions toolbar. class ExtensionToolbarModel : public NotificationObserver { public: explicit ExtensionToolbarModel(ExtensionService* 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(const Extension* extension, int index) {} // The browser action button for |extension| should no longer show. virtual void BrowserActionRemoved(const Extension* extension) {} // The browser action button for |extension| has been moved to |index|. virtual void BrowserActionMoved(const 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(const 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(); } const 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(const Extension* extension); void RemoveExtension(const Extension* extension); // Our ExtensionService, guaranteed to outlive us. ExtensionService* 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_