Refactor the "spell-checker options" submenu.

chrome/browser/tab_contents/spellchecker_submenu_observer.h

+// 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_TAB_CONTENTS_SPELLCHECKER_SUBMENU_OBSERVER_H_
+#define CHROME_BROWSER_TAB_CONTENTS_SPELLCHECKER_SUBMENU_OBSERVER_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/tab_contents/render_view_context_menu_observer.h"
+#include "ui/base/models/simple_menu_model.h"
+
+class RenderViewContextMenuProxy;
+
+// A class that implements the 'spell-checker options' submenu. This class
+// creates the submenu, add it to the parent menu, and handles events.
+class SpellCheckerSubMenuObserver : public RenderViewContextMenuObserver {
+ public:
+  SpellCheckerSubMenuObserver(RenderViewContextMenuProxy* proxy,
+                              ui::SimpleMenuModel::Delegate* delegate,
+                              int group);
+  virtual ~SpellCheckerSubMenuObserver();
+
+  // RenderViewContextMenuObserver implementation.
+  virtual void InitMenu(const ContextMenuParams& params) OVERRIDE;
+  virtual bool IsCommandIdSupported(int command_id) OVERRIDE;
+  virtual bool IsCommandIdChecked(int command_id) OVERRIDE;
+  virtual bool IsCommandIdEnabled(int command_id) OVERRIDE;
+  virtual void ExecuteCommand(int command_id) OVERRIDE;
+
+ private:
+  // The interface for adding a submenu to the parent.
+  RenderViewContextMenuProxy* proxy_;
+
+  // The submenu of the 'spell-checker options'. This class adds items to this
+  // submenu and add it to the parent menu.
+  ui::SimpleMenuModel submenu_model_;
+
+  // Whether spellchecking is enabled in the focused element or not.
+  bool spellcheck_enabled_;
+
+  // The radio items representing languages available for spellchecking.
+  int language_group_;
+  int language_selected_;
+  std::vector<std::string> languages_;
+
+  DISALLOW_COPY_AND_ASSIGN(SpellCheckerSubMenuObserver);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_SPELLCHECKER_SUBMENU_OBSERVER_H_