ui/aura/window_tree_host_x11.cc

   1 // Copyright (c) 2012 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 "ui/aura/window_tree_host_x11.h"
   6
   7 #include <strings.h>
   8 #include <X11/cursorfont.h>
   9 #include <X11/extensions/XInput2.h>
  10 #include <X11/extensions/Xrandr.h>
  11 #include <X11/Xatom.h>
  12 #include <X11/Xcursor/Xcursor.h>
  13 #include <X11/Xlib.h>
  14
  15 #include <algorithm>
  16 #include <limits>
  17 #include <string>
  18
  19 #include "base/basictypes.h"
  20 #include "base/command_line.h"
  21 #include "base/stl_util.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/string_util.h"
  24 #include "base/strings/stringprintf.h"
  25 #include "base/sys_info.h"
  26 #include "base/trace_event/trace_event.h"
  27 #include "ui/aura/client/cursor_client.h"
  28 #include "ui/aura/env.h"
  29 #include "ui/aura/window.h"
  30 #include "ui/aura/window_event_dispatcher.h"
  31 #include "ui/base/cursor/cursor.h"
  32 #include "ui/base/ui_base_switches.h"
  33 #include "ui/base/view_prop.h"
  34 #include "ui/base/x/x11_util.h"
  35 #include "ui/compositor/compositor.h"
  36 #include "ui/compositor/dip_util.h"
  37 #include "ui/compositor/layer.h"
  38 #include "ui/events/devices/x11/device_data_manager_x11.h"
  39 #include "ui/events/devices/x11/device_list_cache_x11.h"
  40 #include "ui/events/devices/x11/touch_factory_x11.h"
  41 #include "ui/events/event.h"
  42 #include "ui/events/event_switches.h"
  43 #include "ui/events/event_utils.h"
  44 #include "ui/events/keycodes/keyboard_codes.h"
  45 #include "ui/events/platform/platform_event_observer.h"
  46 #include "ui/events/platform/x11/x11_event_source.h"
  47 #include "ui/gfx/screen.h"
  48
  49 using std::max;
  50 using std::min;
  51
  52 namespace aura {
  53
  54 namespace {
  55
  56 const char* kAtomsToCache[] = {
  57   "WM_DELETE_WINDOW",
  58   "_NET_WM_PING",
  59   "_NET_WM_PID",
  60   NULL
  61 };
  62
  63 ::Window FindEventTarget(const base::NativeEvent& xev) {
  64   ::Window target = xev->xany.window;
  65   if (xev->type == GenericEvent)
  66     target = static_cast<XIDeviceEvent*>(xev->xcookie.data)->event;
  67   return target;
  68 }
  69
  70 void SelectXInput2EventsForRootWindow(XDisplay* display, ::Window root_window) {
  71   CHECK(ui::IsXInput2Available());
  72   unsigned char mask[XIMaskLen(XI_LASTEVENT)] = {};
  73   memset(mask, 0, sizeof(mask));
  74
  75   XISetMask(mask, XI_HierarchyChanged);
  76
  77   XIEventMask evmask;
  78   evmask.deviceid = XIAllDevices;
  79   evmask.mask_len = sizeof(mask);
  80   evmask.mask = mask;
  81   XISelectEvents(display, root_window, &evmask, 1);
  82
  83 #if defined(OS_CHROMEOS)
  84   if (base::SysInfo::IsRunningOnChromeOS()) {
  85     // It is necessary to listen for touch events on the root window for proper
  86     // touch event calibration on Chrome OS, but this is not currently necessary
  87     // on the desktop. This seems to fail in some cases (e.g. when logging
  88     // in incognito). So select for non-touch events first, and then select for
  89     // touch-events (but keep the other events in the mask, i.e. do not memset
  90     // |mask| back to 0).
  91     // TODO(sad): Figure out why this happens. http://crbug.com/153976
  92     XISetMask(mask, XI_TouchBegin);
  93     XISetMask(mask, XI_TouchUpdate);
  94     XISetMask(mask, XI_TouchEnd);
  95     XISelectEvents(display, root_window, &evmask, 1);
  96   }
  97 #endif
  98 }
  99
 100 bool default_override_redirect = false;
 101
 102 }  // namespace
 103
 104 namespace internal {
 105
 106 // TODO(miletus) : Move this into DeviceDataManager.
 107 // Accomplishes 2 tasks concerning touch event calibration:
 108 // 1. Being a message-pump observer,
 109 //    routes all the touch events to the X root window,
 110 //    where they can be calibrated later.
 111 // 2. Has the Calibrate method that does the actual bezel calibration,
 112 //    when invoked from X root window's event dispatcher.
 113 class TouchEventCalibrate : public ui::PlatformEventObserver {
 114  public:
 115   TouchEventCalibrate() : left_(0), right_(0), top_(0), bottom_(0) {
 116     if (ui::PlatformEventSource::GetInstance())
 117       ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
 118     std::vector<std::string> parts;
 119     if (Tokenize(base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 120                      switches::kTouchCalibration),
 121                  ",", &parts) >= 4) {
 122       if (!base::StringToInt(parts[0], &left_))
 123         DLOG(ERROR) << "Incorrect left border calibration value passed.";
 124       if (!base::StringToInt(parts[1], &right_))
 125         DLOG(ERROR) << "Incorrect right border calibration value passed.";
 126       if (!base::StringToInt(parts[2], &top_))
 127         DLOG(ERROR) << "Incorrect top border calibration value passed.";
 128       if (!base::StringToInt(parts[3], &bottom_))
 129         DLOG(ERROR) << "Incorrect bottom border calibration value passed.";
 130     }
 131   }
 132
 133   ~TouchEventCalibrate() override {
 134     if (ui::PlatformEventSource::GetInstance())
 135       ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
 136   }
 137
 138   // Modify the location of the |event|,
 139   // expanding it from |bounds| to (|bounds| + bezels).
 140   // Required when touchscreen is bigger than screen (i.e. has bezels),
 141   // because we receive events in touchscreen coordinates,
 142   // which need to be expanded when converting to screen coordinates,
 143   // so that location on bezels will be outside of screen area.
 144   void Calibrate(ui::TouchEvent* event, const gfx::Rect& bounds) {
 145     int x = event->x();
 146     int y = event->y();
 147
 148     if (!left_ && !right_ && !top_ && !bottom_)
 149       return;
 150
 151     const int resolution_x = bounds.width();
 152     const int resolution_y = bounds.height();
 153     if (left_ || right_) {
 154       // Offset the x position to the real
 155       x -= left_;
 156       // Scale the screen area back to the full resolution of the screen.
 157       x = (x * resolution_x) / (resolution_x - (right_ + left_));
 158     }
 159     if (top_ || bottom_) {
 160       // When there is a top bezel we add our border,
 161       y -= top_;
 162       // Scale the screen area back to the full resolution of the screen.
 163       y = (y * resolution_y) / (resolution_y - (bottom_ + top_));
 164     }
 165
 166     // Set the modified coordinate back to the event.
 167     if (event->root_location() == event->location()) {
 168       // Usually those will be equal,
 169       // if not, I am not sure what the correct value should be.
 170       event->set_root_location(gfx::Point(x, y));
 171     }
 172     event->set_location(gfx::Point(x, y));
 173   }
 174
 175  private:
 176   // ui::PlatformEventObserver:
 177   void WillProcessEvent(const ui::PlatformEvent& event) override {
 178     if (event->type == GenericEvent &&
 179         (event->xgeneric.evtype == XI_TouchBegin ||
 180          event->xgeneric.evtype == XI_TouchUpdate ||
 181          event->xgeneric.evtype == XI_TouchEnd)) {
 182       XIDeviceEvent* xievent = static_cast<XIDeviceEvent*>(event->xcookie.data);
 183       xievent->event = xievent->root;
 184       xievent->event_x = xievent->root_x;
 185       xievent->event_y = xievent->root_y;
 186     }
 187   }
 188
 189   void DidProcessEvent(const ui::PlatformEvent& event) override {}
 190
 191   // The difference in screen's native resolution pixels between
 192   // the border of the touchscreen and the border of the screen,
 193   // aka bezel sizes.
 194   int left_;
 195   int right_;
 196   int top_;
 197   int bottom_;
 198
 199   DISALLOW_COPY_AND_ASSIGN(TouchEventCalibrate);
 200 };
 201
 202 }  // namespace internal
 203
 204 ////////////////////////////////////////////////////////////////////////////////
 205 // WindowTreeHostX11
 206
 207 WindowTreeHostX11::WindowTreeHostX11(const gfx::Rect& bounds)
 208     : xdisplay_(gfx::GetXDisplay()),
 209       xwindow_(0),
 210       x_root_window_(DefaultRootWindow(xdisplay_)),
 211       current_cursor_(ui::kCursorNull),
 212       window_mapped_(false),
 213       bounds_(bounds),
 214       touch_calibrate_(new internal::TouchEventCalibrate),
 215       atom_cache_(xdisplay_, kAtomsToCache) {
 216   XSetWindowAttributes swa;
 217   memset(&swa, 0, sizeof(swa));
 218   swa.background_pixmap = None;
 219   swa.override_redirect = default_override_redirect;
 220   xwindow_ = XCreateWindow(
 221       xdisplay_, x_root_window_,
 222       bounds.x(), bounds.y(), bounds.width(), bounds.height(),
 223       0,               // border width
 224       CopyFromParent,  // depth
 225       InputOutput,
 226       CopyFromParent,  // visual
 227       CWBackPixmap | CWOverrideRedirect,
 228       &swa);
 229   if (ui::PlatformEventSource::GetInstance())
 230     ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
 231
 232   long event_mask = ButtonPressMask | ButtonReleaseMask | FocusChangeMask |
 233                     KeyPressMask | KeyReleaseMask |
 234                     EnterWindowMask | LeaveWindowMask |
 235                     ExposureMask | VisibilityChangeMask |
 236                     StructureNotifyMask | PropertyChangeMask |
 237                     PointerMotionMask;
 238   XSelectInput(xdisplay_, xwindow_, event_mask);
 239   XFlush(xdisplay_);
 240
 241   if (ui::IsXInput2Available()) {
 242     ui::TouchFactory::GetInstance()->SetupXI2ForXWindow(xwindow_);
 243     SelectXInput2EventsForRootWindow(xdisplay_, x_root_window_);
 244   }
 245
 246   // TODO(erg): We currently only request window deletion events. We also
 247   // should listen for activation events and anything else that GTK+ listens
 248   // for, and do something useful.
 249   ::Atom protocols[2];
 250   protocols[0] = atom_cache_.GetAtom("WM_DELETE_WINDOW");
 251   protocols[1] = atom_cache_.GetAtom("_NET_WM_PING");
 252   XSetWMProtocols(xdisplay_, xwindow_, protocols, 2);
 253
 254   // We need a WM_CLIENT_MACHINE and WM_LOCALE_NAME value so we integrate with
 255   // the desktop environment.
 256   XSetWMProperties(xdisplay_, xwindow_, NULL, NULL, NULL, 0, NULL, NULL, NULL);
 257
 258   // Likewise, the X server needs to know this window's pid so it knows which
 259   // program to kill if the window hangs.
 260   // XChangeProperty() expects "pid" to be long.
 261   static_assert(sizeof(long) >= sizeof(pid_t),
 262                 "pid_t should not be larger than long");
 263   long pid = getpid();
 264   XChangeProperty(xdisplay_,
 265                   xwindow_,
 266                   atom_cache_.GetAtom("_NET_WM_PID"),
 267                   XA_CARDINAL,
 268                   32,
 269                   PropModeReplace,
 270                   reinterpret_cast<unsigned char*>(&pid), 1);
 271
 272   // Allow subclasses to create and cache additional atoms.
 273   atom_cache_.allow_uncached_atoms();
 274
 275   XRRSelectInput(xdisplay_, x_root_window_,
 276                  RRScreenChangeNotifyMask | RROutputChangeNotifyMask);
 277   CreateCompositor(GetAcceleratedWidget());
 278 }
 279
 280 WindowTreeHostX11::~WindowTreeHostX11() {
 281   if (ui::PlatformEventSource::GetInstance())
 282     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 283
 284   DestroyCompositor();
 285   DestroyDispatcher();
 286   XDestroyWindow(xdisplay_, xwindow_);
 287 }
 288
 289 bool WindowTreeHostX11::CanDispatchEvent(const ui::PlatformEvent& event) {
 290   ::Window target = FindEventTarget(event);
 291   return target == xwindow_ || target == x_root_window_;
 292 }
 293
 294 uint32_t WindowTreeHostX11::DispatchEvent(const ui::PlatformEvent& event) {
 295   XEvent* xev = event;
 296   if (FindEventTarget(xev) == x_root_window_) {
 297     if (xev->type == GenericEvent)
 298       DispatchXI2Event(xev);
 299     return ui::POST_DISPATCH_NONE;
 300   }
 301
 302   if (xev->type == MotionNotify) {
 303     // Discard all but the most recent motion event that targets the same
 304     // window with unchanged state.
 305     XEvent last_event;
 306     while (XPending(xev->xany.display)) {
 307       XEvent next_event;
 308       XPeekEvent(xev->xany.display, &next_event);
 309       if (next_event.type == MotionNotify &&
 310           next_event.xmotion.window == xev->xmotion.window &&
 311           next_event.xmotion.subwindow == xev->xmotion.subwindow &&
 312           next_event.xmotion.state == xev->xmotion.state) {
 313         XNextEvent(xev->xany.display, &last_event);
 314         xev = &last_event;
 315       } else {
 316         break;
 317       }
 318     }
 319   }
 320
 321   if ((xev->type == EnterNotify || xev->type == LeaveNotify) &&
 322       xev->xcrossing.detail == NotifyInferior) {
 323     // Ignore EventNotify and LeaveNotify  events from children of |xwindow_|.
 324     // NativeViewGLSurfaceGLX adds a child to |xwindow_|.
 325     // TODO(pkotwicz|tdanderson): Figure out whether the suppression is
 326     // necessary. crbug.com/385716
 327     return ui::POST_DISPATCH_STOP_PROPAGATION;
 328   }
 329
 330   if (xev->type == EnterNotify ||
 331       xev->type == LeaveNotify ||
 332       xev->type == KeyPress ||
 333       xev->type == KeyRelease ||
 334       xev->type == ButtonPress ||
 335       xev->type == ButtonRelease ||
 336       xev->type == MotionNotify) {
 337     switch (ui::EventTypeFromNative(xev)) {
 338       case ui::ET_KEY_PRESSED:
 339       case ui::ET_KEY_RELEASED: {
 340         ui::KeyEvent keydown_event(xev);
 341         SendEventToProcessor(&keydown_event);
 342         break;
 343       }
 344       case ui::ET_MOUSE_MOVED:
 345       case ui::ET_MOUSE_DRAGGED:
 346       case ui::ET_MOUSE_ENTERED:
 347       case ui::ET_MOUSE_EXITED:
 348       case ui::ET_MOUSE_PRESSED:
 349       case ui::ET_MOUSE_RELEASED: {
 350         ui::MouseEvent mouse_event(xev);
 351         if (xev->type == EnterNotify) {
 352           aura::Window* root_window = window();
 353           client::CursorClient* cursor_client =
 354               client::GetCursorClient(root_window);
 355           if (cursor_client) {
 356             const gfx::Display display = gfx::Screen::GetScreenFor(
 357                 root_window)->GetDisplayNearestWindow(root_window);
 358             cursor_client->SetDisplay(display);
 359           }
 360           // EnterNotify creates ET_MOUSE_MOVE. Mark as synthesized as this is
 361           // not a real mouse move event.
 362           mouse_event.set_flags(mouse_event.flags() | ui::EF_IS_SYNTHESIZED);
 363         }
 364
 365         TranslateAndDispatchLocatedEvent(&mouse_event);
 366         break;
 367       }
 368       case ui::ET_MOUSEWHEEL: {
 369         ui::MouseWheelEvent mouseev(xev);
 370         TranslateAndDispatchLocatedEvent(&mouseev);
 371         break;
 372       }
 373       case ui::ET_UNKNOWN:
 374         // No event is created for X11-release events for mouse-wheel buttons.
 375         break;
 376       default:
 377          NOTREACHED();
 378     }
 379     return ui::POST_DISPATCH_STOP_PROPAGATION;
 380   }
 381
 382   switch (xev->type) {
 383     case Expose: {
 384       gfx::Rect damage_rect(xev->xexpose.x, xev->xexpose.y,
 385                             xev->xexpose.width, xev->xexpose.height);
 386       compositor()->ScheduleRedrawRect(damage_rect);
 387       break;
 388     }
 389     case FocusOut:
 390       if (xev->xfocus.mode != NotifyGrab)
 391         OnHostLostWindowCapture();
 392       break;
 393     case ConfigureNotify: {
 394       DCHECK_EQ(xwindow_, xev->xconfigure.event);
 395       DCHECK_EQ(xwindow_, xev->xconfigure.window);
 396       // It's possible that the X window may be resized by some other means
 397       // than from within aura (e.g. the X window manager can change the
 398       // size). Make sure the root window size is maintained properly.
 399       gfx::Rect bounds(xev->xconfigure.x, xev->xconfigure.y,
 400           xev->xconfigure.width, xev->xconfigure.height);
 401       bool size_changed = bounds_.size() != bounds.size();
 402       bool origin_changed = bounds_.origin() != bounds.origin();
 403       bounds_ = bounds;
 404       OnConfigureNotify();
 405       if (size_changed)
 406         OnHostResized(bounds.size());
 407       if (origin_changed)
 408         OnHostMoved(bounds_.origin());
 409       break;
 410     }
 411     case GenericEvent:
 412       DispatchXI2Event(xev);
 413       break;
 414     case ClientMessage: {
 415       Atom message_type = static_cast<Atom>(xev->xclient.data.l[0]);
 416       if (message_type == atom_cache_.GetAtom("WM_DELETE_WINDOW")) {
 417         // We have received a close message from the window manager.
 418         OnHostCloseRequested();
 419       } else if (message_type == atom_cache_.GetAtom("_NET_WM_PING")) {
 420         XEvent reply_event = *xev;
 421         reply_event.xclient.window = x_root_window_;
 422
 423         XSendEvent(xdisplay_,
 424                    reply_event.xclient.window,
 425                    False,
 426                    SubstructureRedirectMask | SubstructureNotifyMask,
 427                    &reply_event);
 428         XFlush(xdisplay_);
 429       }
 430       break;
 431     }
 432     case MappingNotify: {
 433       switch (xev->xmapping.request) {
 434         case MappingModifier:
 435         case MappingKeyboard:
 436           XRefreshKeyboardMapping(&xev->xmapping);
 437           break;
 438         case MappingPointer:
 439           ui::DeviceDataManagerX11::GetInstance()->UpdateButtonMap();
 440           break;
 441         default:
 442           NOTIMPLEMENTED() << " Unknown request: " << xev->xmapping.request;
 443           break;
 444       }
 445       break;
 446     }
 447   }
 448   return ui::POST_DISPATCH_STOP_PROPAGATION;
 449 }
 450
 451 ui::EventSource* WindowTreeHostX11::GetEventSource() {
 452   return this;
 453 }
 454
 455 gfx::AcceleratedWidget WindowTreeHostX11::GetAcceleratedWidget() {
 456   return xwindow_;
 457 }
 458
 459 void WindowTreeHostX11::Show() {
 460   if (!window_mapped_) {
 461     // Before we map the window, set size hints. Otherwise, some window managers
 462     // will ignore toplevel XMoveWindow commands.
 463     XSizeHints size_hints;
 464     size_hints.flags = PPosition | PWinGravity;
 465     size_hints.x = bounds_.x();
 466     size_hints.y = bounds_.y();
 467     // Set StaticGravity so that the window position is not affected by the
 468     // frame width when running with window manager.
 469     size_hints.win_gravity = StaticGravity;
 470     XSetWMNormalHints(xdisplay_, xwindow_, &size_hints);
 471
 472     XMapWindow(xdisplay_, xwindow_);
 473
 474     // We now block until our window is mapped. Some X11 APIs will crash and
 475     // burn if passed |xwindow_| before the window is mapped, and XMapWindow is
 476     // asynchronous.
 477     if (ui::X11EventSource::GetInstance())
 478       ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
 479     window_mapped_ = true;
 480   }
 481 }
 482
 483 void WindowTreeHostX11::Hide() {
 484   if (window_mapped_) {
 485     XWithdrawWindow(xdisplay_, xwindow_, 0);
 486     window_mapped_ = false;
 487   }
 488 }
 489
 490 gfx::Rect WindowTreeHostX11::GetBounds() const {
 491   return bounds_;
 492 }
 493
 494 void WindowTreeHostX11::SetBounds(const gfx::Rect& bounds) {
 495   // Even if the host window's size doesn't change, aura's root window
 496   // size, which is in DIP, changes when the scale changes.
 497   float current_scale = compositor()->device_scale_factor();
 498   float new_scale = gfx::Screen::GetScreenFor(window())->
 499       GetDisplayNearestWindow(window()).device_scale_factor();
 500   bool origin_changed = bounds_.origin() != bounds.origin();
 501   bool size_changed = bounds_.size() != bounds.size();
 502   XWindowChanges changes = {0};
 503   unsigned value_mask = 0;
 504
 505   if (size_changed) {
 506     changes.width = bounds.width();
 507     changes.height = bounds.height();
 508     value_mask = CWHeight | CWWidth;
 509   }
 510
 511   if (origin_changed) {
 512     changes.x = bounds.x();
 513     changes.y = bounds.y();
 514     value_mask |= CWX | CWY;
 515   }
 516   if (value_mask)
 517     XConfigureWindow(xdisplay_, xwindow_, value_mask, &changes);
 518
 519   // Assume that the resize will go through as requested, which should be the
 520   // case if we're running without a window manager.  If there's a window
 521   // manager, it can modify or ignore the request, but (per ICCCM) we'll get a
 522   // (possibly synthetic) ConfigureNotify about the actual size and correct
 523   // |bounds_| later.
 524   bounds_ = bounds;
 525   if (origin_changed)
 526     OnHostMoved(bounds.origin());
 527   if (size_changed || current_scale != new_scale) {
 528     OnHostResized(bounds.size());
 529   } else {
 530     window()->SchedulePaintInRect(window()->bounds());
 531   }
 532 }
 533
 534 gfx::Point WindowTreeHostX11::GetLocationOnNativeScreen() const {
 535   return bounds_.origin();
 536 }
 537
 538 void WindowTreeHostX11::SetCapture() {
 539   // Do not grab X11 input. Grabbing X11 input is asynchronous and this method
 540   // is expected to be synchronous. Grabbing X11 input is unnecessary on
 541   // ChromeOS because ChromeOS manages all of the X windows. When running
 542   // ChromeOS on the desktop for the sake of debugging:
 543   // - Implicit pointer grab as a result of pressing a mouse button
 544   // - Releasing capture as a result of losing activation (FocusOut)
 545   // is sufficient.
 546 }
 547
 548 void WindowTreeHostX11::ReleaseCapture() {
 549 }
 550
 551 void WindowTreeHostX11::SetCursorNative(gfx::NativeCursor cursor) {
 552   if (cursor == current_cursor_)
 553     return;
 554   current_cursor_ = cursor;
 555   SetCursorInternal(cursor);
 556 }
 557
 558 void WindowTreeHostX11::MoveCursorToNative(const gfx::Point& location) {
 559   XWarpPointer(xdisplay_, None, x_root_window_, 0, 0, 0, 0,
 560                bounds_.x() + location.x(),
 561                bounds_.y() + location.y());
 562 }
 563
 564 void WindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
 565 }
 566
 567 ui::EventProcessor* WindowTreeHostX11::GetEventProcessor() {
 568   return dispatcher();
 569 }
 570
 571 void WindowTreeHostX11::DispatchXI2Event(const base::NativeEvent& event) {
 572   ui::TouchFactory* factory = ui::TouchFactory::GetInstance();
 573   XEvent* xev = event;
 574   XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
 575   if (!factory->ShouldProcessXI2Event(xev))
 576     return;
 577
 578   TRACE_EVENT1("input", "WindowTreeHostX11::DispatchXI2Event",
 579                "event_latency_us",
 580                (ui::EventTimeForNow() - ui::EventTimeFromNative(event)).
 581                  InMicroseconds());
 582
 583   int num_coalesced = 0;
 584   XEvent last_event;
 585   if (xev->xgeneric.evtype == XI_Motion) {
 586     // If this is a motion event, we want to coalesce all pending motion
 587     // events that are at the top of the queue. Note, we don't coalesce
 588     // touch update events here.
 589     num_coalesced = ui::CoalescePendingMotionEvents(xev, &last_event);
 590     if (num_coalesced > 0)
 591       xev = &last_event;
 592   }
 593   ui::EventType type = ui::EventTypeFromNative(xev);
 594
 595   switch (type) {
 596     case ui::ET_TOUCH_MOVED:
 597     case ui::ET_TOUCH_PRESSED:
 598     case ui::ET_TOUCH_CANCELLED:
 599     case ui::ET_TOUCH_RELEASED: {
 600       ui::TouchEvent touchev(xev);
 601       if (ui::DeviceDataManagerX11::GetInstance()->TouchEventNeedsCalibrate(
 602               xiev->deviceid)) {
 603         touch_calibrate_->Calibrate(&touchev, bounds_);
 604       }
 605       TranslateAndDispatchLocatedEvent(&touchev);
 606       break;
 607     }
 608     case ui::ET_MOUSE_MOVED:
 609     case ui::ET_MOUSE_DRAGGED:
 610     case ui::ET_MOUSE_PRESSED:
 611     case ui::ET_MOUSE_RELEASED:
 612     case ui::ET_MOUSE_ENTERED:
 613     case ui::ET_MOUSE_EXITED: {
 614       ui::MouseEvent mouseev(xev);
 615       TranslateAndDispatchLocatedEvent(&mouseev);
 616       break;
 617     }
 618     case ui::ET_MOUSEWHEEL: {
 619       ui::MouseWheelEvent mouseev(xev);
 620       TranslateAndDispatchLocatedEvent(&mouseev);
 621       break;
 622     }
 623     case ui::ET_SCROLL_FLING_START:
 624     case ui::ET_SCROLL_FLING_CANCEL:
 625     case ui::ET_SCROLL: {
 626       ui::ScrollEvent scrollev(xev);
 627       SendEventToProcessor(&scrollev);
 628       break;
 629     }
 630     case ui::ET_KEY_PRESSED:
 631     case ui::ET_KEY_RELEASED: {
 632       ui::KeyEvent key_event(xev);
 633       SendEventToProcessor(&key_event);
 634       break;
 635     }
 636     case ui::ET_UMA_DATA:
 637       break;
 638     case ui::ET_UNKNOWN:
 639       break;
 640     default:
 641       NOTREACHED();
 642   }
 643
 644   // If we coalesced an event we need to free its cookie.
 645   if (num_coalesced > 0)
 646     XFreeEventData(xev->xgeneric.display, &last_event.xcookie);
 647 }
 648
 649 void WindowTreeHostX11::SetCursorInternal(gfx::NativeCursor cursor) {
 650   XDefineCursor(xdisplay_, xwindow_, cursor.platform());
 651 }
 652
 653 void WindowTreeHostX11::OnConfigureNotify() {}
 654
 655 void WindowTreeHostX11::TranslateAndDispatchLocatedEvent(
 656     ui::LocatedEvent* event) {
 657   SendEventToProcessor(event);
 658 }
 659
 660 // static
 661 WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
 662   return new WindowTreeHostX11(bounds);
 663 }
 664
 665 // static
 666 gfx::Size WindowTreeHost::GetNativeScreenSize() {
 667   ::XDisplay* xdisplay = gfx::GetXDisplay();
 668   return gfx::Size(DisplayWidth(xdisplay, 0), DisplayHeight(xdisplay, 0));
 669 }
 670
 671 namespace test {
 672
 673 void SetUseOverrideRedirectWindowByDefault(bool override_redirect) {
 674   default_override_redirect = override_redirect;
 675 }
 676
 677 }  // namespace test
 678 }  // namespace aura