ui/views/focus/accelerator_handler_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/views/focus/accelerator_handler.h"
   6
   7 #include "ui/events/event.h"
   8 #include "ui/events/keycodes/keyboard_code_conversion_win.h"
   9 #include "ui/events/keycodes/keyboard_codes.h"
  10 #include "ui/views/focus/focus_manager.h"
  11 #include "ui/views/widget/widget.h"
  12
  13 namespace views {
  14
  15 AcceleratorHandler::AcceleratorHandler() {
  16 }
  17
  18 bool AcceleratorHandler::Dispatch(const base::NativeEvent& msg) {
  19   if (msg.message >= WM_KEYFIRST && msg.message <= WM_KEYLAST) {
  20     Widget* widget = Widget::GetTopLevelWidgetForNativeView(msg.hwnd);
  21     FocusManager* focus_manager = widget ? widget->GetFocusManager() : NULL;
  22     if (focus_manager) {
  23       switch (msg.message) {
  24         case WM_KEYDOWN:
  25         case WM_SYSKEYDOWN: {
  26           ui::KeyEvent event(msg, false);
  27           if (!focus_manager->OnKeyEvent(event)) {
  28             // Record that this key is pressed so we can remember not to
  29             // translate and dispatch the associated WM_KEYUP.
  30             pressed_keys_.insert(msg.wParam);
  31             return true;
  32           }
  33           break;
  34         }
  35         case WM_KEYUP:
  36         case WM_SYSKEYUP: {
  37           std::set<WPARAM>::iterator iter = pressed_keys_.find(msg.wParam);
  38           if (iter != pressed_keys_.end()) {
  39             // Don't translate/dispatch the KEYUP since we have eaten the
  40             // associated KEYDOWN.
  41             pressed_keys_.erase(iter);
  42             return true;
  43           }
  44           break;
  45         }
  46       }
  47     }
  48   }
  49
  50   TranslateMessage(&msg);
  51   DispatchMessage(&msg);
  52   return true;
  53 }
  54
  55 }  // namespace views