IME (input method editor) support for Aura, part 1 of 3: Add ui/base/ime/ classes

base/event_types.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 BASE_EVENT_TYPES_H
 #define BASE_EVENT_TYPES_H
 #pragma once
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(USE_WAYLAND)
 namespace base {
 namespace wayland {
 union WaylandEvent;
 }
 }
 #elif defined(USE_X11)
+#include <X11/Xdefs.h>  // for XID
 typedef union _XEvent XEvent;
 #endif
 
 namespace base {
 
 // Cross platform typedefs for native event types.
 #if defined(OS_WIN)
 typedef MSG NativeEvent;
+typedef HWND NativeWindow;

[brettw, 2011/12/02 03:49:17]

Why not use ui/gfx/native_widget_types.h instead of modifying this?

[Yusuke Sato, 2011/12/02 04:02:25]

This is because ui::InputMethod, which is designed to depend on neither Views
nor Aura, requires a real system window handle.

If I understand correctly, using gfx::NativeWindow introduces Aura dependency
since gfx::NativeWindow is typedefed to aura::Window* when USE_AURA is #defined
(on both Windows and Linux).

 #elif defined(USE_WAYLAND)
 typedef wayland::WaylandEvent* NativeEvent;
+// TODO: typedef NativeWindow.
 #elif defined(USE_X11)
 typedef XEvent* NativeEvent;
+typedef XID NativeWindow;
 #else
 typedef void* NativeEvent;
+typedef void* NativeWindow;
 #endif
 
 } // namespace base
 
 #endif  // BASE_EVENT_TYPES_H