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   bool should_quit = false;
  27   bool should_perform_default = true;
  28   if (menu_controller_->exit_type() == MenuController::EXIT_ALL ||
  29       menu_controller_->exit_type() == MenuController::EXIT_DESTROYED) {
  30     should_quit = true;
  31   } else {
  32     // NOTE: we don't get WM_ACTIVATE or anything else interesting in here.
  33     switch (msg.message) {
  34       case WM_CONTEXTMENU: {
  35         MenuItemView* item = menu_controller_->pending_state_.item;
  36         if (item && item->GetRootMenuItem() != item) {
  37           gfx::Point screen_loc(0, item->height());
  38           View::ConvertPointToScreen(item, &screen_loc);
  39           ui::MenuSourceType source_type = ui::MENU_SOURCE_MOUSE;
  40           if (GET_X_LPARAM(msg.lParam) == -1 && GET_Y_LPARAM(msg.lParam) == -1)
  41             source_type = ui::MENU_SOURCE_KEYBOARD;
  42           item->GetDelegate()->ShowContextMenu(
  43               item, item->GetCommand(), screen_loc, source_type);
  44         }
  45         should_perform_default = false;
  46         break;
  47       }
  48
  49       // NOTE: focus wasn't changed when the menu was shown. As such, don't
  50       // dispatch key events otherwise the focused window will get the events.
  51       case WM_KEYDOWN: {
  52         menu_controller_->OnKeyDown(ui::KeyboardCodeFromNative(msg));
  53         TranslateMessage(&msg);
  54         should_perform_default = false;
  55         break;
  56       }
  57       case WM_CHAR: {
  58         menu_controller_->SelectByChar(static_cast<base::char16>(msg.wParam));
  59         should_perform_default = false;
  60         break;
  61       }
  62       case WM_KEYUP:
  63       case WM_SYSKEYUP:
  64         // We may have been shown on a system key, as such don't do anything
  65         // here. If another system key is pushed we'll get a WM_SYSKEYDOWN and
  66         // close the menu.
  67         should_perform_default = false;
  68         break;
  69
  70       case WM_CANCELMODE:
  71       case WM_SYSKEYDOWN:
  72         // Exit immediately on system keys.
  73         menu_controller_->Cancel(MenuController::EXIT_ALL);
  74         should_quit = true;
  75         should_perform_default = false;
  76         break;
  77
  78       default:
  79         break;
  80     }
  81   }
  82
  83   if (should_quit || menu_controller_->exit_type() != MenuController::EXIT_NONE)
  84     menu_controller_->TerminateNestedMessageLoop();
  85   return should_perform_default ? POST_DISPATCH_PERFORM_DEFAULT
  86                                 : POST_DISPATCH_NONE;
  87 }
  88
  89 }  // namespace internal
  90 }  // namespace views