ash/wm/maximize_mode/scoped_disable_internal_mouse_and_keyboard_x11.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/wm/maximize_mode/scoped_disable_internal_mouse_and_keyboard_x11.h"
   6
   7 #include <set>
   8 #include <X11/extensions/XInput2.h>
   9 #include <X11/Xlib.h>
  10
  11 #include "ash/display/display_controller.h"
  12 #include "ash/screen_util.h"
  13 #include "ash/shell.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/strings/string_util.h"
  16 #include "ui/aura/client/cursor_client.h"
  17 #include "ui/aura/client/screen_position_client.h"
  18 #include "ui/aura/env.h"
  19 #include "ui/aura/window.h"
  20 #include "ui/aura/window_event_dispatcher.h"
  21 #include "ui/aura/window_tree_host.h"
  22 #include "ui/events/devices/input_device.h"
  23 #include "ui/events/devices/keyboard_device.h"
  24 #include "ui/events/devices/x11/device_data_manager_x11.h"
  25 #include "ui/events/devices/x11/device_list_cache_x11.h"
  26 #include "ui/events/event.h"
  27 #include "ui/events/event_utils.h"
  28 #include "ui/events/keycodes/keyboard_codes_posix.h"
  29 #include "ui/events/platform/platform_event_source.h"
  30 #include "ui/gfx/x/x11_types.h"
  31
  32 namespace ash {
  33
  34 namespace {
  35
  36 // The name of the xinput device corresponding to the internal touchpad.
  37 const char kInternalTouchpadName[] = "Elan Touchpad";
  38
  39 // Repeated key events have their source set to the core keyboard device.
  40 // These must be disabled also until http://crbug.com/402898 is resolved.
  41 const char kCoreKeyboardName[] = "Virtual core keyboard";
  42
  43 // Device id used to indicate that a device has not been detected.
  44 const int kDeviceIdNone = -1;
  45
  46 gfx::Point GetMouseLocationInScreen() {
  47   return aura::Env::GetInstance()->last_mouse_location();
  48 }
  49
  50 void SetMouseLocationInScreen(const gfx::Point& screen_location) {
  51   gfx::Display display = ash::ScreenUtil::FindDisplayContainingPoint(
  52       screen_location);
  53   if (!display.is_valid())
  54     return;
  55   aura::Window* root_window = Shell::GetInstance()->display_controller()->
  56       GetRootWindowForDisplayId(display.id());
  57   gfx::Point host_location(screen_location);
  58   aura::client::ScreenPositionClient* client =
  59       aura::client::GetScreenPositionClient(root_window);
  60   if (client)
  61     client->ConvertPointFromScreen(root_window, &host_location);
  62   root_window->GetHost()->MoveCursorTo(host_location);
  63 }
  64
  65 }  // namespace
  66
  67 ScopedDisableInternalMouseAndKeyboardX11::
  68     ScopedDisableInternalMouseAndKeyboardX11()
  69     : touchpad_device_id_(kDeviceIdNone),
  70       keyboard_device_id_(kDeviceIdNone),
  71       core_keyboard_device_id_(kDeviceIdNone),
  72       last_mouse_location_(GetMouseLocationInScreen()) {
  73
  74   ui::DeviceDataManagerX11* device_data_manager =
  75       static_cast<ui::DeviceDataManagerX11*>(
  76           ui::DeviceDataManager::GetInstance());
  77   if (device_data_manager->IsXInput2Available()) {
  78     const XIDeviceList& xi_dev_list =
  79         ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(
  80             gfx::GetXDisplay());
  81     for (int i = 0; i < xi_dev_list.count; ++i) {
  82       std::string device_name(xi_dev_list[i].name);
  83       base::TrimWhitespaceASCII(device_name, base::TRIM_TRAILING, &device_name);
  84       if (device_name == kInternalTouchpadName) {
  85         touchpad_device_id_ = xi_dev_list[i].deviceid;
  86         device_data_manager->DisableDevice(touchpad_device_id_);
  87         aura::client::GetCursorClient(
  88             Shell::GetInstance()->GetPrimaryRootWindow())->HideCursor();
  89       } else if (device_name == kCoreKeyboardName) {
  90         core_keyboard_device_id_ = xi_dev_list[i].deviceid;
  91         device_data_manager->DisableDevice(core_keyboard_device_id_);
  92       }
  93     }
  94
  95     for (const ui::KeyboardDevice& device :
  96          device_data_manager->keyboard_devices()) {
  97       if (device.type == ui::InputDeviceType::INPUT_DEVICE_INTERNAL) {
  98         keyboard_device_id_ = device.id;
  99         device_data_manager->DisableDevice(keyboard_device_id_);
 100         break;
 101       }
 102     }
 103   }
 104   // Allow the accessible keys present on the side of some devices to continue
 105   // working.
 106   scoped_ptr<std::set<ui::KeyboardCode> > excepted_keys(
 107       new std::set<ui::KeyboardCode>);
 108   excepted_keys->insert(ui::VKEY_VOLUME_DOWN);
 109   excepted_keys->insert(ui::VKEY_VOLUME_UP);
 110   excepted_keys->insert(ui::VKEY_POWER);
 111   device_data_manager->SetDisabledKeyboardAllowedKeys(excepted_keys.Pass());
 112   ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
 113 }
 114
 115 ScopedDisableInternalMouseAndKeyboardX11::
 116     ~ScopedDisableInternalMouseAndKeyboardX11() {
 117   ui::DeviceDataManagerX11* device_data_manager =
 118       static_cast<ui::DeviceDataManagerX11*>(
 119           ui::DeviceDataManager::GetInstance());
 120   if (touchpad_device_id_ != kDeviceIdNone)
 121     device_data_manager->EnableDevice(touchpad_device_id_);
 122   if (keyboard_device_id_ != kDeviceIdNone)
 123     device_data_manager->EnableDevice(keyboard_device_id_);
 124   if (core_keyboard_device_id_ != kDeviceIdNone)
 125     device_data_manager->EnableDevice(core_keyboard_device_id_);
 126   device_data_manager->SetDisabledKeyboardAllowedKeys(
 127       scoped_ptr<std::set<ui::KeyboardCode> >());
 128   ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
 129 }
 130
 131 void ScopedDisableInternalMouseAndKeyboardX11::WillProcessEvent(
 132     const ui::PlatformEvent& event) {
 133 }
 134
 135 void ScopedDisableInternalMouseAndKeyboardX11::DidProcessEvent(
 136     const ui::PlatformEvent& event) {
 137   if (event->type != GenericEvent)
 138     return;
 139   XIDeviceEvent* xievent =
 140       static_cast<XIDeviceEvent*>(event->xcookie.data);
 141   ui::DeviceDataManagerX11* device_data_manager =
 142       static_cast<ui::DeviceDataManagerX11*>(
 143           ui::DeviceDataManager::GetInstance());
 144   if (xievent->evtype != XI_Motion ||
 145       device_data_manager->IsFlingEvent(event) ||
 146       device_data_manager->IsScrollEvent(event) ||
 147       device_data_manager->IsCMTMetricsEvent(event)) {
 148     return;
 149   }
 150   if (xievent->sourceid == touchpad_device_id_) {
 151     // The cursor will have already moved even though the move event will be
 152     // blocked. Move the mouse cursor back to its last known location resulting
 153     // from an external mouse to prevent the internal touchpad from moving it.
 154     SetMouseLocationInScreen(last_mouse_location_);
 155   } else {
 156     // Track the last location seen from an external mouse event.
 157     last_mouse_location_ = GetMouseLocationInScreen();
 158   }
 159 }
 160
 161 }  // namespace ash