| // Copyright (c) 2012 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_ |
| |
| #include "base/compiler_specific.h" |
| #include "base/observer_list.h" |
| #include "base/prefs/pref_change_registrar.h" |
| #include "base/scoped_observer.h" |
| #include "components/keyed_service/core/keyed_service.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| #include "extensions/browser/extension_prefs.h" |
| #include "extensions/browser/extension_registry_observer.h" |
| #include "extensions/common/extension.h" |
| |
| class Browser; |
| class PrefService; |
| class Profile; |
| |
| namespace extensions { |
| class ExtensionRegistry; |
| class ExtensionSet; |
| |
| // Model for the browser actions toolbar. |
| class ExtensionToolbarModel : public content::NotificationObserver, |
| public ExtensionRegistryObserver, |
| public KeyedService { |
| public: |
| ExtensionToolbarModel(Profile* profile, ExtensionPrefs* extension_prefs); |
| virtual ~ExtensionToolbarModel(); |
| |
| // The action that should be taken as a result of clicking a browser action. |
| enum Action { |
| ACTION_NONE, |
| ACTION_SHOW_POPUP, |
| // Unlike LocationBarController there is no ACTION_SHOW_CONTEXT_MENU, |
| // because UI implementations tend to handle this themselves at a higher |
| // level. |
| }; |
| |
| // A class which is informed of changes to the model; represents the view of |
| // MVC. Also used for signaling view changes such as showing extension popups. |
| 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) {} |
| |
| // Signal the |extension| to show the popup now in the active window. |
| // Returns true if a popup was slated to be shown. |
| virtual bool BrowserActionShowPopup(const Extension* extension); |
| |
| // Signal when the container needs to be redrawn because of a size change, |
| // and when the model has finished loading. |
| virtual void VisibleCountChanged() {} |
| |
| // Signal that the model has entered or exited highlighting mode, or that |
| // the extensions being highlighted have (probably*) changed. Highlighting |
| // mode indicates that only a subset of the extensions are actively |
| // displayed, and those extensions should be highlighted for extra emphasis. |
| // * probably, because if we are in highlight mode and receive a call to |
| // highlight a new set of extensions, we do not compare the current set |
| // with the new set (and just assume the new set is different). |
| virtual void HighlightModeChanged(bool is_highlighting) {} |
| |
| protected: |
| virtual ~Observer() {} |
| }; |
| |
| // Convenience function to get the ExtensionToolbarModel for a Profile. |
| static ExtensionToolbarModel* Get(Profile* profile); |
| |
| // Functions called by the view. |
| void AddObserver(Observer* observer); |
| void RemoveObserver(Observer* observer); |
| void MoveBrowserAction(const Extension* extension, int index); |
| // Executes the browser action for an extension and returns the action that |
| // the UI should perform in response. |
| // |popup_url_out| will be set if the extension should show a popup, with |
| // the URL that should be shown, if non-NULL. |should_grant| controls whether |
| // the extension should be granted page tab permissions, which is what happens |
| // when the user clicks the browser action, but not, for example, when the |
| // showPopup API is called. |
| Action ExecuteBrowserAction(const Extension* extension, |
| Browser* browser, |
| GURL* popup_url_out, |
| bool should_grant); |
| // 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() const { return visible_icon_count_; } |
| |
| bool extensions_initialized() const { return extensions_initialized_; } |
| |
| const ExtensionList& toolbar_items() const { |
| return is_highlighting_ ? highlighted_items_ : toolbar_items_; |
| } |
| |
| bool is_highlighting() const { return is_highlighting_; } |
| |
| // 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); |
| |
| void OnExtensionToolbarPrefChange(); |
| |
| // Tells observers to display a popup without granting tab permissions and |
| // returns whether the popup was slated to be shown. |
| bool ShowBrowserActionPopup(const Extension* extension); |
| |
| // Ensures that the extensions in the |extension_ids| list are visible on the |
| // toolbar. This might mean they need to be moved to the front (if they are in |
| // the overflow bucket). |
| void EnsureVisibility(const ExtensionIdList& extension_ids); |
| |
| // Highlight the extensions specified by |extension_ids|. This will cause |
| // the ToolbarModel to only display those extensions. |
| // Highlighting mode is only entered if there is at least one extension to |
| // be shown. |
| // Returns true if highlighting mode is entered, false otherwise. |
| bool HighlightExtensions(const ExtensionIdList& extension_ids); |
| |
| // Stop highlighting extensions. All extensions can be shown again, and the |
| // number of visible icons will be reset to what it was before highlighting. |
| void StopHighlighting(); |
| |
| private: |
| // content::NotificationObserver implementation. |
| virtual void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) OVERRIDE; |
| |
| // Callback when extensions are ready. |
| void OnReady(); |
| |
| // ExtensionRegistryObserver implementation. |
| virtual void OnExtensionLoaded(content::BrowserContext* browser_context, |
| const Extension* extension) OVERRIDE; |
| virtual void OnExtensionUnloaded( |
| content::BrowserContext* browser_context, |
| const Extension* extension, |
| UnloadedExtensionInfo::Reason reason) OVERRIDE; |
| virtual void OnExtensionUninstalled(content::BrowserContext* browser_context, |
| const Extension* extension) OVERRIDE; |
| |
| // 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 |toolbar_items_| from these data. |
| void InitializeExtensionList(const ExtensionSet& extensions); |
| void Populate(const ExtensionIdList& positions, |
| const ExtensionSet& extensions); |
| |
| // Save the model to prefs. |
| void UpdatePrefs(); |
| |
| // Finds the last known visible position of the icon for an |extension|. The |
| // value returned is a zero-based index into the vector of visible items. |
| size_t FindNewPositionFromLastKnownGood(const Extension* extension); |
| |
| // Our observers. |
| ObserverList<Observer> observers_; |
| |
| void AddExtension(const Extension* extension); |
| void RemoveExtension(const Extension* extension); |
| |
| // The Profile this toolbar model is for. |
| Profile* profile_; |
| |
| ExtensionPrefs* extension_prefs_; |
| PrefService* prefs_; |
| |
| // True if we've handled the initial EXTENSIONS_READY notification. |
| bool extensions_initialized_; |
| |
| // Ordered list of browser action buttons. |
| ExtensionList toolbar_items_; |
| |
| // List of browser action buttons which should be highlighted. |
| ExtensionList highlighted_items_; |
| |
| // Indication whether or not we are currently in highlight mode; typically, |
| // this is equivalent to !highlighted_items_.empty(), but can be different |
| // if we are exiting highlight mode due to no longer having highlighted items. |
| bool is_highlighting_; |
| |
| // The number of icons which were visible before highlighting a subset, in |
| // order to restore the count when finished. |
| int old_visible_icon_count_; |
| |
| ExtensionIdList last_known_positions_; |
| |
| // The number of icons visible (the rest should be hidden in the overflow |
| // chevron). |
| int visible_icon_count_; |
| |
| content::NotificationRegistrar registrar_; |
| |
| // Listen to extension load, unloaded notifications. |
| ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver> |
| extension_registry_observer_; |
| |
| // For observing change of toolbar order preference by external entity (sync). |
| PrefChangeRegistrar pref_change_registrar_; |
| base::Closure pref_change_callback_; |
| |
| base::WeakPtrFactory<ExtensionToolbarModel> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ExtensionToolbarModel); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_ |