[Win] Ship with Chromium's menu library.

I will hack it.

browser/ui/win/native_menu_win.h

@@ -0,0 +1,169 @@
+// Copyright (c) 2013 GitHub, Inc. All rights reserved.
+// 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 BROWSER_UI_WIN_NATIVE_MENU_WIN_H_
+#define BROWSER_UI_WIN_NATIVE_MENU_WIN_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
+#include "base/string16.h"
+#include "browser/ui/win/menu_wrapper.h"
+
+namespace ui {
+class MenuModel;
+}
+
+namespace atom {
+
+// A Windows implementation of MenuWrapper.
+// TODO(beng): rename to MenuWin once the old class is dead.
+class NativeMenuWin : public MenuWrapper {
+ public:
+  // Construct a NativeMenuWin, with a model and delegate. If |system_menu_for|
+  // is non-NULL, the NativeMenuWin wraps the system menu for that window.
+  // The caller owns the model and the delegate.
+  NativeMenuWin(ui::MenuModel* model, HWND system_menu_for);
+  virtual ~NativeMenuWin();
+
+  // Overridden from MenuWrapper:
+  virtual void RunMenuAt(const gfx::Point& point, int alignment) OVERRIDE;
+  virtual void CancelMenu() OVERRIDE;
+  virtual void Rebuild(views::MenuInsertionDelegateWin* delegate) OVERRIDE;
+  virtual void UpdateStates() OVERRIDE;
+  virtual HMENU GetNativeMenu() const OVERRIDE;
+  virtual MenuAction GetMenuAction() const OVERRIDE;
+  virtual void AddMenuListener(views::MenuListener* listener) OVERRIDE;
+  virtual void RemoveMenuListener(views::MenuListener* listener) OVERRIDE;
+  virtual void SetMinimumWidth(int width) OVERRIDE;
+
+ private:
+  // IMPORTANT: Note about indices.
+  //            Functions in this class deal in two index spaces:
+  //            1. menu_index - the index of an item within the actual Windows
+  //               native menu.
+  //            2. model_index - the index of the item within our model.
+  //            These two are most often but not always the same value! The
+  //            notable exception is when this object is used to wrap the
+  //            Windows System Menu. In this instance, the model indices start
+  //            at 0, but the insertion index into the existing menu is not.
+  //            It is important to take this into consideration when editing the
+  //            code in the functions in this class.
+
+  struct HighlightedMenuItemInfo;
+
+  // Returns true if the item at the specified index is a separator.
+  bool IsSeparatorItemAt(int menu_index) const;
+
+  // Add items. See note above about indices.
+  void AddMenuItemAt(int menu_index, int model_index);
+  void AddSeparatorItemAt(int menu_index, int model_index);
+
+  // Sets the state of the item at the specified index.
+  void SetMenuItemState(int menu_index,
+                        bool enabled,
+                        bool checked,
+                        bool is_default);
+
+  // Sets the label of the item at the specified index.
+  void SetMenuItemLabel(int menu_index,
+                        int model_index,
+                        const string16& label);
+
+  // Updates the local data structure with the correctly formatted version of
+  // |label| at the specified model_index, and adds string data to |mii| if
+  // the menu is not owner-draw. That's a mouthful. This function exists because
+  // of the peculiarities of the Windows menu API.
+  void UpdateMenuItemInfoForString(MENUITEMINFO* mii,
+                                   int model_index,
+                                   const string16& label);
+
+  // Returns the alignment flags to be passed to TrackPopupMenuEx, based on the
+  // supplied alignment and the UI text direction.
+  UINT GetAlignmentFlags(int alignment) const;
+
+  // Resets the native menu stored in |menu_| by destroying any old menu then
+  // creating a new empty one.
+  void ResetNativeMenu();
+
+  // Creates the host window that receives notifications from the menu.
+  void CreateHostWindow();
+
+  // Callback from task to notify menu it was selected.
+  void DelayedSelect();
+
+  // Given a menu that's currently popped-up, find the currently highlighted
+  // item. Returns true if a highlighted item was found.
+  static bool GetHighlightedMenuItemInfo(HMENU menu,
+                                         HighlightedMenuItemInfo* info);
+
+  // Hook to receive keyboard events while the menu is open.
+  static LRESULT CALLBACK MenuMessageHook(
+      int n_code, WPARAM w_param, LPARAM l_param);
+
+  // Our attached model and delegate.
+  ui::MenuModel* model_;
+
+  HMENU menu_;
+
+  // True if the contents of menu items in this menu are drawn by the menu host
+  // window, rather than Windows.
+  bool owner_draw_;
+
+  // An object that collects all of the data associated with an individual menu
+  // item.
+  struct ItemData;
+  std::vector<ItemData*> items_;
+
+  // The window that receives notifications from the menu.
+  class MenuHostWindow;
+  friend MenuHostWindow;
+  scoped_ptr<MenuHostWindow> host_window_;
+
+  // The HWND this menu is the system menu for, or NULL if the menu is not a
+  // system menu.
+  HWND system_menu_for_;
+
+  // The index of the first item in the model in the menu.
+  int first_item_index_;
+
+  // The action that took place during the call to RunMenuAt.
+  MenuAction menu_action_;
+
+  // A list of listeners to call when the menu opens.
+  ObserverList<views::MenuListener> listeners_;
+
+  // Keep track of whether the listeners have already been called at least
+  // once.
+  bool listeners_called_;
+
+  // See comment in MenuMessageHook for details on these.
+  NativeMenuWin* menu_to_select_;
+  int position_to_select_;
+  base::WeakPtrFactory<NativeMenuWin> menu_to_select_factory_;
+
+  // If we're a submenu, this is our parent.
+  NativeMenuWin* parent_;
+
+  // If non-null the destructor sets this to true. This is set to non-null while
+  // the menu is showing. It is used to detect if the menu was deleted while
+  // running.
+  bool* destroyed_flag_;
+
+  // Ugly: a static pointer to the instance of this class that currently
+  // has a menu open, because our hook function that receives keyboard
+  // events doesn't have a mechanism to get a user data pointer.
+  static NativeMenuWin* open_native_menu_win_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeMenuWin);
+};
+
+}  // namespace atom
+
+#endif  // BROWSER_UI_WIN_NATIVE_MENU_WIN_H_