1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_ 6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_ 7 #pragma once 8 9 #include "base/observer_list.h" 10 #include "chrome/common/extensions/extension.h" 11 #include "content/common/notification_observer.h" 12 #include "content/common/notification_registrar.h" 13 14 class ExtensionService; 15 class PrefService; 16 17 // Model for the browser actions toolbar. 18 class ExtensionToolbarModel : public NotificationObserver { 19 public: 20 explicit ExtensionToolbarModel(ExtensionService* service); 21 ~ExtensionToolbarModel(); 22 23 // Notifies the toolbar model that the Profile that suplied its 24 // prefs is being destroyed. 25 void DestroyingProfile(); 26 27 // A class which is informed of changes to the model; represents the view of 28 // MVC. 29 class Observer { 30 public: 31 // An extension with a browser action button has been added, and should go 32 // in the toolbar at |index|. BrowserActionAdded(const Extension * extension,int index)33 virtual void BrowserActionAdded(const Extension* extension, int index) {} 34 35 // The browser action button for |extension| should no longer show. BrowserActionRemoved(const Extension * extension)36 virtual void BrowserActionRemoved(const Extension* extension) {} 37 38 // The browser action button for |extension| has been moved to |index|. BrowserActionMoved(const Extension * extension,int index)39 virtual void BrowserActionMoved(const Extension* extension, int index) {} 40 41 // Called when the model has finished loading. ModelLoaded()42 virtual void ModelLoaded() {} 43 44 protected: ~Observer()45 virtual ~Observer() {} 46 }; 47 48 // Functions called by the view. 49 void AddObserver(Observer* observer); 50 void RemoveObserver(Observer* observer); 51 void MoveBrowserAction(const Extension* extension, int index); 52 // If count == size(), this will set the visible icon count to -1, meaning 53 // "show all actions". 54 void SetVisibleIconCount(int count); 55 // As above, a return value of -1 represents "show all actions". GetVisibleIconCount()56 int GetVisibleIconCount() { return visible_icon_count_; } 57 extensions_initialized()58 bool extensions_initialized() const { return extensions_initialized_; } 59 size()60 size_t size() const { 61 return toolitems_.size(); 62 } 63 begin()64 ExtensionList::iterator begin() { 65 return toolitems_.begin(); 66 } 67 end()68 ExtensionList::iterator end() { 69 return toolitems_.end(); 70 } 71 72 const Extension* GetExtensionByIndex(int index) const; 73 74 // Utility functions for converting between an index into the list of 75 // incognito-enabled browser actions, and the list of all browser actions. 76 int IncognitoIndexToOriginal(int incognito_index); 77 int OriginalIndexToIncognito(int original_index); 78 79 private: 80 // NotificationObserver implementation. 81 virtual void Observe(NotificationType type, 82 const NotificationSource& source, 83 const NotificationDetails& details); 84 85 // To be called after the extension service is ready; gets loaded extensions 86 // from the extension service and their saved order from the pref service 87 // and constructs |toolitems_| from these data. 88 void InitializeExtensionList(); 89 90 // Save the model to prefs. 91 void UpdatePrefs(); 92 93 // Our observers. 94 ObserverList<Observer> observers_; 95 96 void AddExtension(const Extension* extension); 97 void RemoveExtension(const Extension* extension); 98 99 // Our ExtensionService, guaranteed to outlive us. 100 ExtensionService* service_; 101 102 PrefService* prefs_; 103 104 // True if we've handled the initial EXTENSIONS_READY notification. 105 bool extensions_initialized_; 106 107 // Ordered list of browser action buttons. 108 ExtensionList toolitems_; 109 110 // Keeps track of what the last extension to get disabled was. 111 std::string last_extension_removed_; 112 113 // Keeps track of where the last extension to get disabled was in the list. 114 size_t last_extension_removed_index_; 115 116 // The number of icons visible (the rest should be hidden in the overflow 117 // chevron). 118 int visible_icon_count_; 119 120 NotificationRegistrar registrar_; 121 }; 122 123 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_ 124