ash/accelerators/spoken_feedback_toggler.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/spoken_feedback_toggler.h"
   6
   7 #include "ash/accelerators/key_hold_detector.h"
   8 #include "ash/accessibility_delegate.h"
   9 #include "ash/shell.h"
  10
  11 namespace ash {
  12 namespace {
  13 bool speech_feedback_toggler_enabled = false;
  14 }
  15
  16 // static
  17 bool SpokenFeedbackToggler::IsEnabled() {
  18   return speech_feedback_toggler_enabled;
  19 }
  20
  21 // static
  22 void SpokenFeedbackToggler::SetEnabled(bool enabled) {
  23   speech_feedback_toggler_enabled = enabled;
  24 }
  25
  26 // static
  27 scoped_ptr<ui::EventHandler> SpokenFeedbackToggler::CreateHandler() {
  28   scoped_ptr<KeyHoldDetector::Delegate> delegate(new SpokenFeedbackToggler());
  29   return scoped_ptr<ui::EventHandler>(new KeyHoldDetector(delegate.Pass()));
  30 }
  31
  32 bool SpokenFeedbackToggler::ShouldProcessEvent(
  33     const ui::KeyEvent* event) const {
  34   return IsEnabled() && event->key_code() == ui::VKEY_F6;
  35 }
  36
  37 bool SpokenFeedbackToggler::IsStartEvent(const ui::KeyEvent* event) const {
  38   return event->type() == ui::ET_KEY_PRESSED &&
  39       event->flags() & ui::EF_SHIFT_DOWN;
  40 }
  41
  42 void SpokenFeedbackToggler::OnKeyHold(const ui::KeyEvent* event) {
  43   if (!toggled_) {
  44     toggled_ = true;
  45     Shell::GetInstance()->accessibility_delegate()->
  46         ToggleSpokenFeedback(ui::A11Y_NOTIFICATION_SHOW);
  47   }
  48 }
  49
  50 void SpokenFeedbackToggler::OnKeyUnhold(const ui::KeyEvent* event) {
  51   toggled_ = false;
  52 }
  53
  54 SpokenFeedbackToggler::SpokenFeedbackToggler() : toggled_(false) {}
  55
  56 SpokenFeedbackToggler::~SpokenFeedbackToggler() {}
  57
  58 }  // namespace ash