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     // The "grace area" (10% in this case) is to make it easier for the user to
 154     // navigate to the corner.
 155     const double kGraceAreaFraction = 0.1;
 156     if (left_ || right_) {
 157       // Offset the x position to the real
 158       x -= left_;
 159       // Check if we are in the grace area of the left side.
 160       // Note: We might not want to do this when the gesture is locked?
 161       if (x < 0 && x > -left_ * kGraceAreaFraction)
 162         x = 0;
 163       // Check if we are in the grace area of the right side.
 164       // Note: We might not want to do this when the gesture is locked?
 165       if (x > resolution_x - left_ &&
 166           x < resolution_x - left_ + right_ * kGraceAreaFraction)
 167         x = resolution_x - left_;
 168       // Scale the screen area back to the full resolution of the screen.
 169       x = (x * resolution_x) / (resolution_x - (right_ + left_));
 170     }
 171     if (top_ || bottom_) {
 172       // When there is a top bezel we add our border,
 173       y -= top_;
 174
 175       // Check if we are in the grace area of the top side.
 176       // Note: We might not want to do this when the gesture is locked?
 177       if (y < 0 && y > -top_ * kGraceAreaFraction)
 178         y = 0;
 179
 180       // Check if we are in the grace area of the bottom side.
 181       // Note: We might not want to do this when the gesture is locked?
 182       if (y > resolution_y - top_ &&
 183           y < resolution_y - top_ + bottom_ * kGraceAreaFraction)
 184         y = resolution_y - top_;
 185       // Scale the screen area back to the full resolution of the screen.
 186       y = (y * resolution_y) / (resolution_y - (bottom_ + top_));
 187     }
 188
 189     // Set the modified coordinate back to the event.
 190     if (event->root_location() == event->location()) {
 191       // Usually those will be equal,
 192       // if not, I am not sure what the correct value should be.
 193       event->set_root_location(gfx::Point(x, y));
 194     }
 195     event->set_location(gfx::Point(x, y));
 196   }
 197
 198  private:
 199   // ui::PlatformEventObserver:
 200   void WillProcessEvent(const ui::PlatformEvent& event) override {
 201     if (event->type == GenericEvent &&
 202         (event->xgeneric.evtype == XI_TouchBegin ||
 203          event->xgeneric.evtype == XI_TouchUpdate ||
 204          event->xgeneric.evtype == XI_TouchEnd)) {
 205       XIDeviceEvent* xievent = static_cast<XIDeviceEvent*>(event->xcookie.data);
 206       xievent->event = xievent->root;
 207       xievent->event_x = xievent->root_x;
 208       xievent->event_y = xievent->root_y;
 209     }
 210   }
 211
 212   void DidProcessEvent(const ui::PlatformEvent& event) override {}
 213
 214   // The difference in screen's native resolution pixels between
 215   // the border of the touchscreen and the border of the screen,
 216   // aka bezel sizes.
 217   int left_;
 218   int right_;
 219   int top_;
 220   int bottom_;
 221
 222   DISALLOW_COPY_AND_ASSIGN(TouchEventCalibrate);
 223 };
 224
 225 }  // namespace internal
 226
 227 ////////////////////////////////////////////////////////////////////////////////
 228 // WindowTreeHostX11
 229
 230 WindowTreeHostX11::WindowTreeHostX11(const gfx::Rect& bounds)
 231     : xdisplay_(gfx::GetXDisplay()),
 232       xwindow_(0),
 233       x_root_window_(DefaultRootWindow(xdisplay_)),
 234       current_cursor_(ui::kCursorNull),
 235       window_mapped_(false),
 236       bounds_(bounds),
 237       touch_calibrate_(new internal::TouchEventCalibrate),
 238       atom_cache_(xdisplay_, kAtomsToCache) {
 239   XSetWindowAttributes swa;
 240   memset(&swa, 0, sizeof(swa));
 241   swa.background_pixmap = None;
 242   swa.override_redirect = default_override_redirect;
 243   xwindow_ = XCreateWindow(
 244       xdisplay_, x_root_window_,
 245       bounds.x(), bounds.y(), bounds.width(), bounds.height(),
 246       0,               // border width
 247       CopyFromParent,  // depth
 248       InputOutput,
 249       CopyFromParent,  // visual
 250       CWBackPixmap | CWOverrideRedirect,
 251       &swa);
 252   if (ui::PlatformEventSource::GetInstance())
 253     ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
 254
 255   long event_mask = ButtonPressMask | ButtonReleaseMask | FocusChangeMask |
 256                     KeyPressMask | KeyReleaseMask |
 257                     EnterWindowMask | LeaveWindowMask |
 258                     ExposureMask | VisibilityChangeMask |
 259                     StructureNotifyMask | PropertyChangeMask |
 260                     PointerMotionMask;
 261   XSelectInput(xdisplay_, xwindow_, event_mask);
 262   XFlush(xdisplay_);
 263
 264   if (ui::IsXInput2Available()) {
 265     ui::TouchFactory::GetInstance()->SetupXI2ForXWindow(xwindow_);
 266     SelectXInput2EventsForRootWindow(xdisplay_, x_root_window_);
 267   }
 268
 269   // TODO(erg): We currently only request window deletion events. We also
 270   // should listen for activation events and anything else that GTK+ listens
 271   // for, and do something useful.
 272   ::Atom protocols[2];
 273   protocols[0] = atom_cache_.GetAtom("WM_DELETE_WINDOW");
 274   protocols[1] = atom_cache_.GetAtom("_NET_WM_PING");
 275   XSetWMProtocols(xdisplay_, xwindow_, protocols, 2);
 276
 277   // We need a WM_CLIENT_MACHINE and WM_LOCALE_NAME value so we integrate with
 278   // the desktop environment.
 279   XSetWMProperties(xdisplay_, xwindow_, NULL, NULL, NULL, 0, NULL, NULL, NULL);
 280
 281   // Likewise, the X server needs to know this window's pid so it knows which
 282   // program to kill if the window hangs.
 283   // XChangeProperty() expects "pid" to be long.
 284   static_assert(sizeof(long) >= sizeof(pid_t),
 285                 "pid_t should not be larger than long");
 286   long pid = getpid();
 287   XChangeProperty(xdisplay_,
 288                   xwindow_,
 289                   atom_cache_.GetAtom("_NET_WM_PID"),
 290                   XA_CARDINAL,
 291                   32,
 292                   PropModeReplace,
 293                   reinterpret_cast<unsigned char*>(&pid), 1);
 294
 295   // Allow subclasses to create and cache additional atoms.
 296   atom_cache_.allow_uncached_atoms();
 297
 298   XRRSelectInput(xdisplay_, x_root_window_,
 299                  RRScreenChangeNotifyMask | RROutputChangeNotifyMask);
 300   CreateCompositor(GetAcceleratedWidget());
 301 }
 302
 303 WindowTreeHostX11::~WindowTreeHostX11() {
 304   if (ui::PlatformEventSource::GetInstance())
 305     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 306
 307   DestroyCompositor();
 308   DestroyDispatcher();
 309   XDestroyWindow(xdisplay_, xwindow_);
 310 }
 311
 312 bool WindowTreeHostX11::CanDispatchEvent(const ui::PlatformEvent& event) {
 313   ::Window target = FindEventTarget(event);
 314   return target == xwindow_ || target == x_root_window_;
 315 }
 316
 317 uint32_t WindowTreeHostX11::DispatchEvent(const ui::PlatformEvent& event) {
 318   XEvent* xev = event;
 319   if (FindEventTarget(xev) == x_root_window_) {
 320     if (xev->type == GenericEvent)
 321       DispatchXI2Event(xev);
 322     return ui::POST_DISPATCH_NONE;
 323   }
 324
 325   if (xev->type == MotionNotify) {
 326     // Discard all but the most recent motion event that targets the same
 327     // window with unchanged state.
 328     XEvent last_event;
 329     while (XPending(xev->xany.display)) {
 330       XEvent next_event;
 331       XPeekEvent(xev->xany.display, &next_event);
 332       if (next_event.type == MotionNotify &&
 333           next_event.xmotion.window == xev->xmotion.window &&
 334           next_event.xmotion.subwindow == xev->xmotion.subwindow &&
 335           next_event.xmotion.state == xev->xmotion.state) {
 336         XNextEvent(xev->xany.display, &last_event);
 337         xev = &last_event;
 338       } else {
 339         break;
 340       }
 341     }
 342   }
 343
 344   if ((xev->type == EnterNotify || xev->type == LeaveNotify) &&
 345       xev->xcrossing.detail == NotifyInferior) {
 346     // Ignore EventNotify and LeaveNotify  events from children of |xwindow_|.
 347     // NativeViewGLSurfaceGLX adds a child to |xwindow_|.
 348     // TODO(pkotwicz|tdanderson): Figure out whether the suppression is
 349     // necessary. crbug.com/385716
 350     return ui::POST_DISPATCH_STOP_PROPAGATION;
 351   }
 352
 353   if (xev->type == EnterNotify ||
 354       xev->type == LeaveNotify ||
 355       xev->type == KeyPress ||
 356       xev->type == KeyRelease ||
 357       xev->type == ButtonPress ||
 358       xev->type == ButtonRelease ||
 359       xev->type == MotionNotify) {
 360     switch (ui::EventTypeFromNative(xev)) {
 361       case ui::ET_KEY_PRESSED:
 362       case ui::ET_KEY_RELEASED: {
 363         ui::KeyEvent keydown_event(xev);
 364         SendEventToProcessor(&keydown_event);
 365         break;
 366       }
 367       case ui::ET_MOUSE_MOVED:
 368       case ui::ET_MOUSE_DRAGGED:
 369       case ui::ET_MOUSE_ENTERED:
 370       case ui::ET_MOUSE_EXITED:
 371       case ui::ET_MOUSE_PRESSED:
 372       case ui::ET_MOUSE_RELEASED: {
 373         ui::MouseEvent mouse_event(xev);
 374         if (xev->type == EnterNotify) {
 375           aura::Window* root_window = window();
 376           client::CursorClient* cursor_client =
 377               client::GetCursorClient(root_window);
 378           if (cursor_client) {
 379             const gfx::Display display = gfx::Screen::GetScreenFor(
 380                 root_window)->GetDisplayNearestWindow(root_window);
 381             cursor_client->SetDisplay(display);
 382           }
 383           // EnterNotify creates ET_MOUSE_MOVE. Mark as synthesized as this is
 384           // not a real mouse move event.
 385           mouse_event.set_flags(mouse_event.flags() | ui::EF_IS_SYNTHESIZED);
 386         }
 387
 388         TranslateAndDispatchLocatedEvent(&mouse_event);
 389         break;
 390       }
 391       case ui::ET_MOUSEWHEEL: {
 392         ui::MouseWheelEvent mouseev(xev);
 393         TranslateAndDispatchLocatedEvent(&mouseev);
 394         break;
 395       }
 396       case ui::ET_UNKNOWN:
 397         // No event is created for X11-release events for mouse-wheel buttons.
 398         break;
 399       default:
 400          NOTREACHED();
 401     }
 402     return ui::POST_DISPATCH_STOP_PROPAGATION;
 403   }
 404
 405   switch (xev->type) {
 406     case Expose: {
 407       gfx::Rect damage_rect(xev->xexpose.x, xev->xexpose.y,
 408                             xev->xexpose.width, xev->xexpose.height);
 409       compositor()->ScheduleRedrawRect(damage_rect);
 410       break;
 411     }
 412     case FocusOut:
 413       if (xev->xfocus.mode != NotifyGrab)
 414         OnHostLostWindowCapture();
 415       break;
 416     case ConfigureNotify: {
 417       DCHECK_EQ(xwindow_, xev->xconfigure.event);
 418       DCHECK_EQ(xwindow_, xev->xconfigure.window);
 419       // It's possible that the X window may be resized by some other means
 420       // than from within aura (e.g. the X window manager can change the
 421       // size). Make sure the root window size is maintained properly.
 422       gfx::Rect bounds(xev->xconfigure.x, xev->xconfigure.y,
 423           xev->xconfigure.width, xev->xconfigure.height);
 424       bool size_changed = bounds_.size() != bounds.size();
 425       bool origin_changed = bounds_.origin() != bounds.origin();
 426       bounds_ = bounds;
 427       OnConfigureNotify();
 428       if (size_changed)
 429         OnHostResized(bounds.size());
 430       if (origin_changed)
 431         OnHostMoved(bounds_.origin());
 432       break;
 433     }
 434     case GenericEvent:
 435       DispatchXI2Event(xev);
 436       break;
 437     case ClientMessage: {
 438       Atom message_type = static_cast<Atom>(xev->xclient.data.l[0]);
 439       if (message_type == atom_cache_.GetAtom("WM_DELETE_WINDOW")) {
 440         // We have received a close message from the window manager.
 441         OnHostCloseRequested();
 442       } else if (message_type == atom_cache_.GetAtom("_NET_WM_PING")) {
 443         XEvent reply_event = *xev;
 444         reply_event.xclient.window = x_root_window_;
 445
 446         XSendEvent(xdisplay_,
 447                    reply_event.xclient.window,
 448                    False,
 449                    SubstructureRedirectMask | SubstructureNotifyMask,
 450                    &reply_event);
 451         XFlush(xdisplay_);
 452       }
 453       break;
 454     }
 455     case MappingNotify: {
 456       switch (xev->xmapping.request) {
 457         case MappingModifier:
 458         case MappingKeyboard:
 459           XRefreshKeyboardMapping(&xev->xmapping);
 460           break;
 461         case MappingPointer:
 462           ui::DeviceDataManagerX11::GetInstance()->UpdateButtonMap();
 463           break;
 464         default:
 465           NOTIMPLEMENTED() << " Unknown request: " << xev->xmapping.request;
 466           break;
 467       }
 468       break;
 469     }
 470   }
 471   return ui::POST_DISPATCH_STOP_PROPAGATION;
 472 }
 473
 474 ui::EventSource* WindowTreeHostX11::GetEventSource() {
 475   return this;
 476 }
 477
 478 gfx::AcceleratedWidget WindowTreeHostX11::GetAcceleratedWidget() {
 479   return xwindow_;
 480 }
 481
 482 void WindowTreeHostX11::Show() {
 483   if (!window_mapped_) {
 484     // Before we map the window, set size hints. Otherwise, some window managers
 485     // will ignore toplevel XMoveWindow commands.
 486     XSizeHints size_hints;
 487     size_hints.flags = PPosition | PWinGravity;
 488     size_hints.x = bounds_.x();
 489     size_hints.y = bounds_.y();
 490     // Set StaticGravity so that the window position is not affected by the
 491     // frame width when running with window manager.
 492     size_hints.win_gravity = StaticGravity;
 493     XSetWMNormalHints(xdisplay_, xwindow_, &size_hints);
 494
 495     XMapWindow(xdisplay_, xwindow_);
 496
 497     // We now block until our window is mapped. Some X11 APIs will crash and
 498     // burn if passed |xwindow_| before the window is mapped, and XMapWindow is
 499     // asynchronous.
 500     if (ui::X11EventSource::GetInstance())
 501       ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
 502     window_mapped_ = true;
 503   }
 504 }
 505
 506 void WindowTreeHostX11::Hide() {
 507   if (window_mapped_) {
 508     XWithdrawWindow(xdisplay_, xwindow_, 0);
 509     window_mapped_ = false;
 510   }
 511 }
 512
 513 gfx::Rect WindowTreeHostX11::GetBounds() const {
 514   return bounds_;
 515 }
 516
 517 void WindowTreeHostX11::SetBounds(const gfx::Rect& bounds) {
 518   // Even if the host window's size doesn't change, aura's root window
 519   // size, which is in DIP, changes when the scale changes.
 520   float current_scale = compositor()->device_scale_factor();
 521   float new_scale = gfx::Screen::GetScreenFor(window())->
 522       GetDisplayNearestWindow(window()).device_scale_factor();
 523   bool origin_changed = bounds_.origin() != bounds.origin();
 524   bool size_changed = bounds_.size() != bounds.size();
 525   XWindowChanges changes = {0};
 526   unsigned value_mask = 0;
 527
 528   if (size_changed) {
 529     changes.width = bounds.width();
 530     changes.height = bounds.height();
 531     value_mask = CWHeight | CWWidth;
 532   }
 533
 534   if (origin_changed) {
 535     changes.x = bounds.x();
 536     changes.y = bounds.y();
 537     value_mask |= CWX | CWY;
 538   }
 539   if (value_mask)
 540     XConfigureWindow(xdisplay_, xwindow_, value_mask, &changes);
 541
 542   // Assume that the resize will go through as requested, which should be the
 543   // case if we're running without a window manager.  If there's a window
 544   // manager, it can modify or ignore the request, but (per ICCCM) we'll get a
 545   // (possibly synthetic) ConfigureNotify about the actual size and correct
 546   // |bounds_| later.
 547   bounds_ = bounds;
 548   if (origin_changed)
 549     OnHostMoved(bounds.origin());
 550   if (size_changed || current_scale != new_scale) {
 551     OnHostResized(bounds.size());
 552   } else {
 553     window()->SchedulePaintInRect(window()->bounds());
 554   }
 555 }
 556
 557 gfx::Point WindowTreeHostX11::GetLocationOnNativeScreen() const {
 558   return bounds_.origin();
 559 }
 560
 561 void WindowTreeHostX11::SetCapture() {
 562   // Do not grab X11 input. Grabbing X11 input is asynchronous and this method
 563   // is expected to be synchronous. Grabbing X11 input is unnecessary on
 564   // ChromeOS because ChromeOS manages all of the X windows. When running
 565   // ChromeOS on the desktop for the sake of debugging:
 566   // - Implicit pointer grab as a result of pressing a mouse button
 567   // - Releasing capture as a result of losing activation (FocusOut)
 568   // is sufficient.
 569 }
 570
 571 void WindowTreeHostX11::ReleaseCapture() {
 572 }
 573
 574 void WindowTreeHostX11::SetCursorNative(gfx::NativeCursor cursor) {
 575   if (cursor == current_cursor_)
 576     return;
 577   current_cursor_ = cursor;
 578   SetCursorInternal(cursor);
 579 }
 580
 581 void WindowTreeHostX11::MoveCursorToNative(const gfx::Point& location) {
 582   XWarpPointer(xdisplay_, None, x_root_window_, 0, 0, 0, 0,
 583                bounds_.x() + location.x(),
 584                bounds_.y() + location.y());
 585 }
 586
 587 void WindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
 588 }
 589
 590 ui::EventProcessor* WindowTreeHostX11::GetEventProcessor() {
 591   return dispatcher();
 592 }
 593
 594 void WindowTreeHostX11::DispatchXI2Event(const base::NativeEvent& event) {
 595   ui::TouchFactory* factory = ui::TouchFactory::GetInstance();
 596   XEvent* xev = event;
 597   XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
 598   if (!factory->ShouldProcessXI2Event(xev))
 599     return;
 600
 601   TRACE_EVENT1("input", "WindowTreeHostX11::DispatchXI2Event",
 602                "event_latency_us",
 603                (ui::EventTimeForNow() - ui::EventTimeFromNative(event)).
 604                  InMicroseconds());
 605
 606   int num_coalesced = 0;
 607   XEvent last_event;
 608   if (xev->xgeneric.evtype == XI_Motion) {
 609     // If this is a motion event, we want to coalesce all pending motion
 610     // events that are at the top of the queue. Note, we don't coalesce
 611     // touch update events here.
 612     num_coalesced = ui::CoalescePendingMotionEvents(xev, &last_event);
 613     if (num_coalesced > 0)
 614       xev = &last_event;
 615   }
 616   ui::EventType type = ui::EventTypeFromNative(xev);
 617
 618   switch (type) {
 619     case ui::ET_TOUCH_MOVED:
 620     case ui::ET_TOUCH_PRESSED:
 621     case ui::ET_TOUCH_CANCELLED:
 622     case ui::ET_TOUCH_RELEASED: {
 623       ui::TouchEvent touchev(xev);
 624       if (ui::DeviceDataManagerX11::GetInstance()->TouchEventNeedsCalibrate(
 625               xiev->deviceid)) {
 626         touch_calibrate_->Calibrate(&touchev, bounds_);
 627       }
 628       TranslateAndDispatchLocatedEvent(&touchev);
 629       break;
 630     }
 631     case ui::ET_MOUSE_MOVED:
 632     case ui::ET_MOUSE_DRAGGED:
 633     case ui::ET_MOUSE_PRESSED:
 634     case ui::ET_MOUSE_RELEASED:
 635     case ui::ET_MOUSE_ENTERED:
 636     case ui::ET_MOUSE_EXITED: {
 637       ui::MouseEvent mouseev(xev);
 638       TranslateAndDispatchLocatedEvent(&mouseev);
 639       break;
 640     }
 641     case ui::ET_MOUSEWHEEL: {
 642       ui::MouseWheelEvent mouseev(xev);
 643       TranslateAndDispatchLocatedEvent(&mouseev);
 644       break;
 645     }
 646     case ui::ET_SCROLL_FLING_START:
 647     case ui::ET_SCROLL_FLING_CANCEL:
 648     case ui::ET_SCROLL: {
 649       ui::ScrollEvent scrollev(xev);
 650       SendEventToProcessor(&scrollev);
 651       break;
 652     }
 653     case ui::ET_KEY_PRESSED:
 654     case ui::ET_KEY_RELEASED: {
 655       ui::KeyEvent key_event(xev);
 656       SendEventToProcessor(&key_event);
 657       break;
 658     }
 659     case ui::ET_UMA_DATA:
 660       break;
 661     case ui::ET_UNKNOWN:
 662       break;
 663     default:
 664       NOTREACHED();
 665   }
 666
 667   // If we coalesced an event we need to free its cookie.
 668   if (num_coalesced > 0)
 669     XFreeEventData(xev->xgeneric.display, &last_event.xcookie);
 670 }
 671
 672 void WindowTreeHostX11::SetCursorInternal(gfx::NativeCursor cursor) {
 673   XDefineCursor(xdisplay_, xwindow_, cursor.platform());
 674 }
 675
 676 void WindowTreeHostX11::OnConfigureNotify() {}
 677
 678 void WindowTreeHostX11::TranslateAndDispatchLocatedEvent(
 679     ui::LocatedEvent* event) {
 680   SendEventToProcessor(event);
 681 }
 682
 683 // static
 684 WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
 685   return new WindowTreeHostX11(bounds);
 686 }
 687
 688 // static
 689 gfx::Size WindowTreeHost::GetNativeScreenSize() {
 690   ::XDisplay* xdisplay = gfx::GetXDisplay();
 691   return gfx::Size(DisplayWidth(xdisplay, 0), DisplayHeight(xdisplay, 0));
 692 }
 693
 694 namespace test {
 695
 696 void SetUseOverrideRedirectWindowByDefault(bool override_redirect) {
 697   default_override_redirect = override_redirect;
 698 }
 699
 700 }  // namespace test
 701 }  // namespace aura