ash/autoclick/autoclick_controller.cc

   1 // Copyright 2013 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/autoclick/autoclick_controller.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/wm/coordinate_conversion.h"
   9 #include "base/timer/timer.h"
  10 #include "ui/aura/env.h"
  11 #include "ui/aura/root_window.h"
  12 #include "ui/events/event.h"
  13 #include "ui/events/event_constants.h"
  14 #include "ui/events/event_handler.h"
  15 #include "ui/gfx/point.h"
  16
  17 namespace ash {
  18
  19 namespace {
  20
  21 // The default wait time between last mouse movement and sending the autoclick.
  22 int kDefaultClickWaitTimeMs = 500;
  23
  24 }  // namespace
  25
  26 class AutoclickControllerImpl : public AutoclickController,
  27                                 public ui::EventHandler {
  28  public:
  29   AutoclickControllerImpl();
  30   virtual ~AutoclickControllerImpl();
  31
  32  private:
  33   // AutoclickController overrides:
  34   virtual void SetEnabled(bool enabled) OVERRIDE;
  35   virtual bool IsEnabled() const OVERRIDE;
  36   virtual void SetClickWaitTime(int wait_time_ms) OVERRIDE;
  37   virtual int GetClickWaitTime() const OVERRIDE;
  38
  39   // ui::EventHandler overrides:
  40   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
  41   virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
  42   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
  43
  44   void InitClickTimer();
  45
  46   void DoAutoclick();
  47
  48   bool enabled_;
  49   int wait_time_ms_;
  50   int mouse_event_flags_;
  51   scoped_ptr<base::Timer> autoclick_timer_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(AutoclickControllerImpl);
  54 };
  55
  56
  57 AutoclickControllerImpl::AutoclickControllerImpl()
  58     : enabled_(false),
  59       wait_time_ms_(kDefaultClickWaitTimeMs),
  60       mouse_event_flags_(ui::EF_NONE) {
  61   InitClickTimer();
  62 }
  63
  64 AutoclickControllerImpl::~AutoclickControllerImpl() {
  65 }
  66
  67 void AutoclickControllerImpl::SetEnabled(bool enabled) {
  68   if (enabled_ == enabled)
  69     return;
  70   enabled_ = enabled;
  71
  72   if (enabled_) {
  73     Shell::GetInstance()->AddPreTargetHandler(this);
  74     autoclick_timer_->Stop();
  75   } else {
  76     Shell::GetInstance()->RemovePreTargetHandler(this);
  77   }
  78 }
  79
  80 bool AutoclickControllerImpl::IsEnabled() const {
  81   return enabled_;
  82 }
  83
  84 void AutoclickControllerImpl::SetClickWaitTime(int wait_time_ms) {
  85   wait_time_ms_ = wait_time_ms;
  86   InitClickTimer();
  87 }
  88
  89 int AutoclickControllerImpl::GetClickWaitTime() const {
  90   return wait_time_ms_;
  91 }
  92
  93 void AutoclickControllerImpl::InitClickTimer() {
  94   autoclick_timer_.reset(new base::Timer(
  95       FROM_HERE,
  96       base::TimeDelta::FromMilliseconds(wait_time_ms_),
  97       base::Bind(&AutoclickControllerImpl::DoAutoclick,
  98                  base::Unretained(this)),
  99       false));
 100 }
 101
 102 void AutoclickControllerImpl::OnMouseEvent(ui::MouseEvent* event) {
 103   if (event->type() == ui::ET_MOUSE_MOVED) {
 104     mouse_event_flags_ = event->flags();
 105     autoclick_timer_->Reset();
 106   } else if (event->type() == ui::ET_MOUSE_PRESSED) {
 107     autoclick_timer_->Stop();
 108   } else if (event->type() == ui::ET_MOUSEWHEEL &&
 109              autoclick_timer_->IsRunning()) {
 110     autoclick_timer_->Reset();
 111   }
 112 }
 113
 114 void AutoclickControllerImpl::OnKeyEvent(ui::KeyEvent* event) {
 115   int modifier_mask =
 116       ui::EF_SHIFT_DOWN |
 117       ui::EF_CONTROL_DOWN |
 118       ui::EF_ALT_DOWN |
 119       ui::EF_COMMAND_DOWN |
 120       ui::EF_EXTENDED;
 121   int new_modifiers = event->flags() & modifier_mask;
 122   mouse_event_flags_ = (mouse_event_flags_ & ~modifier_mask) | new_modifiers;
 123 }
 124
 125 void AutoclickControllerImpl::OnTouchEvent(ui::TouchEvent* event) {
 126   autoclick_timer_->Stop();
 127 }
 128
 129 void AutoclickControllerImpl::DoAutoclick() {
 130   gfx::Point screen_location =
 131       aura::Env::GetInstance()->last_mouse_location();
 132   aura::RootWindow* root_window = wm::GetRootWindowAt(screen_location);
 133   DCHECK(root_window) << "Root window not found while attempting autoclick.";
 134
 135   gfx::Point click_location(screen_location);
 136   wm::ConvertPointFromScreen(root_window, &click_location);
 137   root_window->ConvertPointToHost(&click_location);
 138
 139   ui::MouseEvent press_event(ui::ET_MOUSE_PRESSED,
 140                              click_location,
 141                              click_location,
 142                              mouse_event_flags_ | ui::EF_LEFT_MOUSE_BUTTON);
 143   ui::MouseEvent release_event(ui::ET_MOUSE_RELEASED,
 144                                click_location,
 145                                click_location,
 146                                mouse_event_flags_ | ui::EF_LEFT_MOUSE_BUTTON);
 147
 148   root_window->AsRootWindowHostDelegate()->OnHostMouseEvent(&press_event);
 149   root_window->AsRootWindowHostDelegate()->OnHostMouseEvent(&release_event);
 150 }
 151
 152 // static.
 153 AutoclickController* AutoclickController::CreateInstance() {
 154   return new AutoclickControllerImpl();
 155 }
 156
 157 }  // namespace ash