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// 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_UI_WEBUI_OPTIONS_OPTIONS_UI_H_
#define CHROME_BROWSER_UI_WEBUI_OPTIONS_OPTIONS_UI_H_
#pragma once
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
#include "content/browser/webui/web_ui.h"
#include "content/common/notification_observer.h"
#include "content/common/notification_registrar.h"
#include "content/common/notification_type.h"
class GURL;
class PrefService;
struct UserMetricsAction;
// The base class handler of Javascript messages of options pages.
class OptionsPageUIHandler : public WebUIMessageHandler,
public NotificationObserver {
public:
OptionsPageUIHandler();
virtual ~OptionsPageUIHandler();
// Is this handler enabled?
virtual bool IsEnabled();
// Collects localized strings for options page.
virtual void GetLocalizedValues(DictionaryValue* localized_strings) = 0;
// Initialize the page. Called once the DOM is available for manipulation.
// This will be called only once.
virtual void Initialize() {}
// Uninitializes the page. Called just before the object is destructed.
virtual void Uninitialize() {}
// WebUIMessageHandler implementation.
virtual void RegisterMessages() {}
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {}
void UserMetricsRecordAction(const UserMetricsAction& action);
protected:
struct OptionsStringResource {
// The name of the resource in templateData.
const char* name;
// The .grd ID for the resource (IDS_*).
int id;
};
// A helper for simplifying the process of registering strings in WebUI.
static void RegisterStrings(DictionaryValue* localized_strings,
const OptionsStringResource* resources,
size_t length);
// Registers string resources for a page's header and tab title.
static void RegisterTitle(DictionaryValue* localized_strings,
const std::string& variable_name,
int title_id);
NotificationRegistrar registrar_;
private:
DISALLOW_COPY_AND_ASSIGN(OptionsPageUIHandler);
};
// An interface for common operations that a host of OptionsPageUIHandlers
// should provide.
class OptionsPageUIHandlerHost {
public:
virtual void InitializeHandlers() = 0;
};
// The WebUI for chrome:settings.
class OptionsUI : public WebUI,
public OptionsPageUIHandlerHost {
public:
explicit OptionsUI(TabContents* contents);
virtual ~OptionsUI();
static RefCountedMemory* GetFaviconResourceBytes();
// Overridden from WebUI:
virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
virtual void DidBecomeActiveForReusedRenderView() OVERRIDE;
// Overridden from OptionsPageUIHandlerHost:
virtual void InitializeHandlers() OVERRIDE;
private:
// Adds OptionsPageUiHandler to the handlers list if handler is enabled.
void AddOptionsPageUIHandler(DictionaryValue* localized_strings,
OptionsPageUIHandler* handler);
bool initialized_handlers_;
DISALLOW_COPY_AND_ASSIGN(OptionsUI);
};
#endif // CHROME_BROWSER_UI_WEBUI_OPTIONS_OPTIONS_UI_H_
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