ash/accelerators/nested_accelerator_delegate.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 "ash/accelerators/nested_accelerator_delegate.h"
   6
   7 #include "ash/accelerators/accelerator_controller.h"
   8 #include "ash/shell.h"
   9 #include "ui/aura/window_event_dispatcher.h"
  10 #include "ui/base/accelerators/accelerator.h"
  11 #include "ui/events/event.h"
  12 #include "ui/events/event_constants.h"
  13 #include "ui/events/event_utils.h"
  14 #include "ui/views/controls/menu/menu_controller.h"
  15
  16 namespace ash {
  17 namespace {
  18
  19 bool IsPossibleAcceleratorNotForMenu(const ui::Accelerator& accelerator) {
  20   // For shortcuts generated by Ctrl or Alt plus a letter, number or
  21   // the tab key, we want to exit the context menu first and then
  22   // repost the event. That allows for the shortcut execution after
  23   // the context menu has exited.
  24   if (accelerator.type() == ui::ET_KEY_PRESSED &&
  25       (accelerator.modifiers() & (ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN))) {
  26     const ui::KeyboardCode key_code = accelerator.key_code();
  27     if ((key_code >= ui::VKEY_A && key_code <= ui::VKEY_Z) ||
  28         (key_code >= ui::VKEY_0 && key_code <= ui::VKEY_9) ||
  29         (key_code == ui::VKEY_TAB)) {
  30       return true;
  31     }
  32   }
  33   return false;
  34 }
  35
  36 bool ShouldProcessAcceleratorNow(const ui::Accelerator& accelerator) {
  37   if (!IsPossibleAcceleratorNotForMenu(accelerator))
  38     return true;
  39
  40   if (views::MenuController* menu_controller =
  41           views::MenuController::GetActiveInstance()) {
  42     menu_controller->CancelAll();
  43     return false;
  44   }
  45   return true;
  46 }
  47
  48 }  // namespace
  49
  50 NestedAcceleratorDelegate::NestedAcceleratorDelegate() {
  51 }
  52
  53 NestedAcceleratorDelegate::~NestedAcceleratorDelegate() {
  54 }
  55
  56 NestedAcceleratorDelegate::Result NestedAcceleratorDelegate::ProcessAccelerator(
  57     const ui::Accelerator& accelerator) {
  58   if (!ShouldProcessAcceleratorNow(accelerator))
  59     return RESULT_PROCESS_LATER;
  60
  61   ash::AcceleratorController* accelerator_controller =
  62       ash::Shell::GetInstance()->accelerator_controller();
  63   if (!accelerator_controller)
  64     return RESULT_NOT_PROCESSED;
  65   return accelerator_controller->Process(accelerator) ? RESULT_PROCESSED
  66                                                       : RESULT_NOT_PROCESSED;
  67 }
  68
  69 }  // namespace ash