Build key map DomCodeToKey() for Windows

ui/events/keycodes/keyboard_lookup_win.h

Index: ui/events/keycodes/keyboard_lookup_win.h
diff --git a/ui/events/keycodes/keyboard_lookup_win.h b/ui/events/keycodes/keyboard_lookup_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..d22361e01c7fcd1dca3e87660c6f197884f101aa
--- /dev/null
+++ b/ui/events/keycodes/keyboard_lookup_win.h
@@ -0,0 +1,46 @@
+// Copyright (c) 2015 The Chromium Authors. All rights reserved.

[dtapuska, 2016/01/21 01:59:36]

2016

[chongz, 2016/01/21 15:47:40]

Acknowledged.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_EVENTS_KEYCODES_KEYBOARD_LOOKUP_WIN_H_
+#define UI_EVENTS_KEYCODES_KEYBOARD_LOOKUP_WIN_H_
+
+#include <windows.h>
+
+#include "ui/events/event_constants.h"
+#include "ui/events/events_base_export.h"
+#include "ui/events/keycodes/dom/dom_key.h"
+#include "ui/events/keycodes/keyboard_codes_win.h"
+
+namespace ui {
+
+class EVENTS_BASE_EXPORT WindowsKeyboardLookup {
+ public:
+  static WindowsKeyboardLookup* Create(HKL alayout);

[dtapuska, 2016/01/21 01:59:36]

You likely want to hold return this as a scoped_ptr so ownership is clear..

[chongz, 2016/01/21 15:47:40]

Will just expose constructor

+
+  static DomKey VirtualKeyToCurrentLayoutDomKey(KeyboardCode vkcode,
+                                                int event_flags);
+  DomKey VirtualKeyToDomKey(KeyboardCode vkcode, int event_flags) const;
+
+ private:
+  WindowsKeyboardLookup(): keyboard_layout_(nullptr) {}
+
+  void CheckOrLoadLayout(HKL alayout);
+  void SetModifierState(BYTE *keyboard_state, int event_flags) const;
+
+  size_t GetEventFlagsIndex(int event_flags) const;

[dtapuska, 2016/01/21 01:59:36]

I think these three things can just be in anonymous scope namespace in the impl
file.

[chongz, 2016/01/21 15:47:40]

Acknowledged.

+  int EventFlagsFromIndex(size_t index) const;
+  static const EventFlags event_flags_index[];
+
+  static const size_t kMaxVirtualKeyCode = 256;
+  static const size_t kMaxKeyboardModifier = 1 << 8;
+
+  HKL keyboard_layout_;
+  DomKey lookup_table_[kMaxVirtualKeyCode][kMaxKeyboardModifier];
+
+  static WindowsKeyboardLookup* GetInstance();
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_KEYCODES_KEYBOARD_LOOKUP_WIN_H_