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// 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_UI_WEBUI_OPTIONS_FONT_SETTINGS_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_OPTIONS_FONT_SETTINGS_HANDLER_H_
#include "base/memory/scoped_ptr.h"
#include "base/prefs/pref_member.h"
#include "base/scoped_observer.h"
#include "chrome/browser/ui/webui/options/options_ui.h"
#include "extensions/browser/extension_registry_observer.h"
namespace base {
class ListValue;
}
namespace extensions {
class Extension;
class ExtensionRegistry;
}
namespace options {
// Font settings overlay page UI handler.
class FontSettingsHandler : public OptionsPageUIHandler,
public extensions::ExtensionRegistryObserver {
public:
FontSettingsHandler();
~FontSettingsHandler() override;
// OptionsPageUIHandler implementation.
void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
void InitializeHandler() override;
void InitializePage() override;
// WebUIMessageHandler implementation.
void RegisterMessages() 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::UnloadedExtensionInfo::Reason reason) override;
private:
void HandleFetchFontsData(const base::ListValue* args);
void FontsListHasLoaded(scoped_ptr<base::ListValue> list);
void SetUpStandardFontSample();
void SetUpSerifFontSample();
void SetUpSansSerifFontSample();
void SetUpFixedFontSample();
void SetUpMinimumFontSample();
// Returns the Advanced Font Settings Extension if it's installed and enabled,
// or NULL otherwise.
const extensions::Extension* GetAdvancedFontSettingsExtension();
// Notifies the web UI about whether the Advanced Font Settings Extension is
// installed and enabled.
void NotifyAdvancedFontSettingsAvailability();
// Opens the options page of the Advanced Font Settings Extension.
void HandleOpenAdvancedFontSettingsOptions(const base::ListValue* args);
void OnWebKitDefaultFontSizeChanged();
StringPrefMember standard_font_;
StringPrefMember serif_font_;
StringPrefMember sans_serif_font_;
StringPrefMember fixed_font_;
StringPrefMember font_encoding_;
IntegerPrefMember default_font_size_;
IntegerPrefMember default_fixed_font_size_;
IntegerPrefMember minimum_font_size_;
ScopedObserver<extensions::ExtensionRegistry,
extensions::ExtensionRegistryObserver>
extension_registry_observer_;
DISALLOW_COPY_AND_ASSIGN(FontSettingsHandler);
};
} // namespace options
#endif // CHROME_BROWSER_UI_WEBUI_OPTIONS_FONT_SETTINGS_HANDLER_H_
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