| // Copyright 2015 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_UI_WEBUI_SETTINGS_FONT_HANDLER_H_ |
| #define CHROME_BROWSER_UI_WEBUI_SETTINGS_FONT_HANDLER_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/scoped_observer.h" |
| #include "chrome/browser/ui/webui/settings/settings_page_ui_handler.h" |
| #include "extensions/browser/extension_registry_observer.h" |
| |
| namespace base { |
| class ListValue; |
| } |
| |
| namespace content { |
| class WebUI; |
| } |
| |
| namespace extensions { |
| class Extension; |
| class ExtensionRegistry; |
| } |
| |
| class Profile; |
| |
| namespace settings { |
| |
| // Handle OS font list and font preference settings. |
| class FontHandler : public SettingsPageUIHandler, |
| public extensions::ExtensionRegistryObserver { |
| public: |
| explicit FontHandler(content::WebUI* webui); |
| ~FontHandler() override; |
| |
| // SettingsPageUIHandler implementation. |
| void RegisterMessages() override; |
| void OnJavascriptAllowed() override; |
| void OnJavascriptDisallowed() override; |
| |
| // ExtensionRegistryObserver implementation. |
| void OnExtensionLoaded(content::BrowserContext* browser_context, |
| const extensions::Extension* extension) override; |
| void OnExtensionUnloaded(content::BrowserContext* browser_context, |
| const extensions::Extension* extension, |
| extensions::UnloadedExtensionReason reason) override; |
| |
| private: |
| // Handler for script asking for font information. |
| void HandleFetchFontsData(const base::ListValue* args); |
| |
| // Listen for changes to whether the advanced font extension is available. |
| // An initial update will be sent when observation begins. |
| void HandleObserveAdvancedFontExtensionAvailable(const base::ListValue* args); |
| |
| // Open the advanced font settings page. |
| void HandleOpenAdvancedFontSettings(const base::ListValue* args); |
| |
| // Callback to handle fonts loading. |
| void FontListHasLoaded(std::string callback_id, |
| std::unique_ptr<base::ListValue> list); |
| |
| const extensions::Extension* GetAdvancedFontSettingsExtension(); |
| |
| void NotifyAdvancedFontSettingsAvailability(); |
| |
| ScopedObserver<extensions::ExtensionRegistry, |
| extensions::ExtensionRegistryObserver> |
| extension_registry_observer_; |
| |
| Profile* profile_; // Weak pointer. |
| |
| base::WeakPtrFactory<FontHandler> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FontHandler); |
| }; |
| |
| } // namespace settings |
| |
| #endif // CHROME_BROWSER_UI_WEBUI_SETTINGS_FONT_HANDLER_H_ |