src/ui/views/controls/menu/menu_message_pump_dispatcher_win.cc

   1 // Copyright 2014 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/controls/menu/menu_message_pump_dispatcher_win.h"
   6
   7 #include <windowsx.h>
   8
   9 #include "ui/events/event_utils.h"
  10 #include "ui/events/keycodes/keyboard_code_conversion.h"
  11 #include "ui/events/keycodes/keyboard_codes.h"
  12 #include "ui/views/controls/menu/menu_controller.h"
  13 #include "ui/views/controls/menu/menu_item_view.h"
  14
  15 namespace views {
  16 namespace internal {
  17
  18 MenuMessagePumpDispatcher::MenuMessagePumpDispatcher(MenuController* controller)
  19     : menu_controller_(controller) {}
  20
  21 MenuMessagePumpDispatcher::~MenuMessagePumpDispatcher() {}
  22
  23 uint32_t MenuMessagePumpDispatcher::Dispatch(const MSG& msg) {
  24   DCHECK(menu_controller_->IsBlockingRun());
  25
  26   if (menu_controller_->exit_type() == MenuController::EXIT_ALL ||
  27       menu_controller_->exit_type() == MenuController::EXIT_DESTROYED)
  28     return (POST_DISPATCH_QUIT_LOOP | POST_DISPATCH_PERFORM_DEFAULT);
  29
  30   // NOTE: we don't get WM_ACTIVATE or anything else interesting in here.
  31   switch (msg.message) {
  32     case WM_CONTEXTMENU: {
  33       MenuItemView* item = menu_controller_->pending_state_.item;
  34       if (item && item->GetRootMenuItem() != item) {
  35         gfx::Point screen_loc(0, item->height());
  36         View::ConvertPointToScreen(item, &screen_loc);
  37         ui::MenuSourceType source_type = ui::MENU_SOURCE_MOUSE;
  38         if (GET_X_LPARAM(msg.lParam) == -1 && GET_Y_LPARAM(msg.lParam) == -1)
  39           source_type = ui::MENU_SOURCE_KEYBOARD;
  40         item->GetDelegate()->ShowContextMenu(
  41             item, item->GetCommand(), screen_loc, source_type);
  42       }
  43       return POST_DISPATCH_NONE;
  44     }
  45
  46     // NOTE: focus wasn't changed when the menu was shown. As such, don't
  47     // dispatch key events otherwise the focused window will get the events.
  48     case WM_KEYDOWN: {
  49       bool result =
  50           menu_controller_->OnKeyDown(ui::KeyboardCodeFromNative(msg));
  51       TranslateMessage(&msg);
  52       return result ? POST_DISPATCH_NONE : POST_DISPATCH_QUIT_LOOP;
  53     }
  54     case WM_CHAR: {
  55       bool should_exit =
  56           menu_controller_->SelectByChar(static_cast<base::char16>(msg.wParam));
  57       return should_exit ? POST_DISPATCH_QUIT_LOOP : POST_DISPATCH_NONE;
  58     }
  59     case WM_KEYUP:
  60       return POST_DISPATCH_NONE;
  61
  62     case WM_SYSKEYUP:
  63       // We may have been shown on a system key, as such don't do anything
  64       // here. If another system key is pushed we'll get a WM_SYSKEYDOWN and
  65       // close the menu.
  66       return POST_DISPATCH_NONE;
  67
  68     case WM_CANCELMODE:
  69     case WM_SYSKEYDOWN:
  70       // Exit immediately on system keys.
  71       menu_controller_->Cancel(MenuController::EXIT_ALL);
  72       return POST_DISPATCH_QUIT_LOOP;
  73
  74     default:
  75       break;
  76   }
  77   return POST_DISPATCH_PERFORM_DEFAULT |
  78          (menu_controller_->exit_type() == MenuController::EXIT_NONE
  79               ? POST_DISPATCH_NONE
  80               : POST_DISPATCH_QUIT_LOOP);
  81 }
  82
  83 }  // namespace internal
  84 }  // namespace views