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/x11/device_data_manager_x11.h"
  23 #include "ui/events/devices/x11/device_list_cache_x11.h"
  24 #include "ui/events/event.h"
  25 #include "ui/events/event_utils.h"
  26 #include "ui/events/keycodes/keyboard_codes_posix.h"
  27 #include "ui/events/platform/platform_event_source.h"
  28 #include "ui/gfx/x/x11_types.h"
  29
  30 namespace ash {
  31
  32 namespace {
  33
  34 // The name of the xinput device corresponding to the internal touchpad.
  35 const char kInternalTouchpadName[] = "Elan Touchpad";
  36
  37 // The name of the xinput device corresponding to the internal keyboard.
  38 const char kInternalKeyboardName[] = "AT Translated Set 2 keyboard";
  39
  40 // Repeated key events have their source set to the core keyboard device.
  41 // These must be disabled also until http://crbug.com/402898 is resolved.
  42 const char kCoreKeyboardName[] = "Virtual core keyboard";
  43
  44 // Device id used to indicate that a device has not been detected.
  45 const int kDeviceIdNone = -1;
  46
  47 gfx::Point GetMouseLocationInScreen() {
  48   return aura::Env::GetInstance()->last_mouse_location();
  49 }
  50
  51 void SetMouseLocationInScreen(const gfx::Point& screen_location) {
  52   gfx::Display display = ash::ScreenUtil::FindDisplayContainingPoint(
  53       screen_location);
  54   if (!display.is_valid())
  55     return;
  56   aura::Window* root_window = Shell::GetInstance()->display_controller()->
  57       GetRootWindowForDisplayId(display.id());
  58   gfx::Point host_location(screen_location);
  59   aura::client::ScreenPositionClient* client =
  60       aura::client::GetScreenPositionClient(root_window);
  61   if (client)
  62     client->ConvertPointFromScreen(root_window, &host_location);
  63   root_window->GetHost()->MoveCursorTo(host_location);
  64 }
  65
  66 }  // namespace
  67
  68 ScopedDisableInternalMouseAndKeyboardX11::
  69     ScopedDisableInternalMouseAndKeyboardX11()
  70     : touchpad_device_id_(kDeviceIdNone),
  71       keyboard_device_id_(kDeviceIdNone),
  72       core_keyboard_device_id_(kDeviceIdNone),
  73       last_mouse_location_(GetMouseLocationInScreen()) {
  74
  75   ui::DeviceDataManagerX11* device_data_manager =
  76       static_cast<ui::DeviceDataManagerX11*>(
  77           ui::DeviceDataManager::GetInstance());
  78   if (device_data_manager->IsXInput2Available()) {
  79     XIDeviceList xi_dev_list = ui::DeviceListCacheX11::GetInstance()->
  80         GetXI2DeviceList(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 == kInternalKeyboardName) {
  90         keyboard_device_id_ = xi_dev_list[i].deviceid;
  91         device_data_manager->DisableDevice(keyboard_device_id_);
  92       } else if (device_name == kCoreKeyboardName) {
  93         core_keyboard_device_id_ = xi_dev_list[i].deviceid;
  94         device_data_manager->DisableDevice(core_keyboard_device_id_);
  95       }
  96     }
  97   }
  98   // Allow the accessible keys present on the side of some devices to continue
  99   // working.
 100   scoped_ptr<std::set<ui::KeyboardCode> > excepted_keys(
 101       new std::set<ui::KeyboardCode>);
 102   excepted_keys->insert(ui::VKEY_VOLUME_DOWN);
 103   excepted_keys->insert(ui::VKEY_VOLUME_UP);
 104   excepted_keys->insert(ui::VKEY_POWER);
 105   device_data_manager->SetDisabledKeyboardAllowedKeys(excepted_keys.Pass());
 106   ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
 107 }
 108
 109 ScopedDisableInternalMouseAndKeyboardX11::
 110     ~ScopedDisableInternalMouseAndKeyboardX11() {
 111   ui::DeviceDataManagerX11* device_data_manager =
 112       static_cast<ui::DeviceDataManagerX11*>(
 113           ui::DeviceDataManager::GetInstance());
 114   if (touchpad_device_id_ != kDeviceIdNone)
 115     device_data_manager->EnableDevice(touchpad_device_id_);
 116   if (keyboard_device_id_ != kDeviceIdNone)
 117     device_data_manager->EnableDevice(keyboard_device_id_);
 118   if (core_keyboard_device_id_ != kDeviceIdNone)
 119     device_data_manager->EnableDevice(core_keyboard_device_id_);
 120   device_data_manager->SetDisabledKeyboardAllowedKeys(
 121       scoped_ptr<std::set<ui::KeyboardCode> >());
 122   ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
 123 }
 124
 125 void ScopedDisableInternalMouseAndKeyboardX11::WillProcessEvent(
 126     const ui::PlatformEvent& event) {
 127 }
 128
 129 void ScopedDisableInternalMouseAndKeyboardX11::DidProcessEvent(
 130     const ui::PlatformEvent& event) {
 131   if (event->type != GenericEvent)
 132     return;
 133   XIDeviceEvent* xievent =
 134       static_cast<XIDeviceEvent*>(event->xcookie.data);
 135   ui::DeviceDataManagerX11* device_data_manager =
 136       static_cast<ui::DeviceDataManagerX11*>(
 137           ui::DeviceDataManager::GetInstance());
 138   if (xievent->evtype != XI_Motion ||
 139       device_data_manager->IsFlingEvent(event) ||
 140       device_data_manager->IsScrollEvent(event) ||
 141       device_data_manager->IsCMTMetricsEvent(event)) {
 142     return;
 143   }
 144   if (xievent->sourceid == touchpad_device_id_) {
 145     // The cursor will have already moved even though the move event will be
 146     // blocked. Move the mouse cursor back to its last known location resulting
 147     // from an external mouse to prevent the internal touchpad from moving it.
 148     SetMouseLocationInScreen(last_mouse_location_);
 149   } else {
 150     // Track the last location seen from an external mouse event.
 151     last_mouse_location_ = GetMouseLocationInScreen();
 152   }
 153 }
 154
 155 }  // namespace ash