ash/host/ash_window_tree_host_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/host/ash_window_tree_host_x11.h"
   6
   7 #include <X11/extensions/Xfixes.h>
   8 #include <X11/extensions/XInput2.h>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xlib.h>
  11
  12 #include <string>
  13 #include <vector>
  14
  15 #include "ash/host/ash_window_tree_host_init_params.h"
  16 #include "ash/host/ash_window_tree_host_unified.h"
  17 #include "ash/host/root_window_transformer.h"
  18 #include "base/basictypes.h"
  19 #include "base/sys_info.h"
  20 #include "ui/aura/env.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/aura/window_event_dispatcher.h"
  23 #include "ui/base/x/x11_util.h"
  24 #include "ui/events/devices/device_data_manager.h"
  25 #include "ui/events/devices/x11/device_list_cache_x11.h"
  26 #include "ui/events/devices/x11/touch_factory_x11.h"
  27 #include "ui/events/event.h"
  28 #include "ui/events/event_utils.h"
  29 #include "ui/events/null_event_targeter.h"
  30 #include "ui/events/platform/platform_event_source.h"
  31 #include "ui/gfx/geometry/rect.h"
  32 #include "ui/gfx/screen.h"
  33
  34 namespace ash {
  35
  36 AshWindowTreeHostX11::AshWindowTreeHostX11(const gfx::Rect& initial_bounds)
  37     : WindowTreeHostX11(initial_bounds), transformer_helper_(this) {
  38   transformer_helper_.Init();
  39   aura::Env::GetInstance()->AddObserver(this);
  40 }
  41
  42 AshWindowTreeHostX11::~AshWindowTreeHostX11() {
  43   aura::Env::GetInstance()->RemoveObserver(this);
  44   UnConfineCursor();
  45 }
  46
  47 void AshWindowTreeHostX11::ToggleFullScreen() { NOTIMPLEMENTED(); }
  48
  49 bool AshWindowTreeHostX11::ConfineCursorToRootWindow() {
  50 #if XFIXES_MAJOR >= 5
  51   DCHECK(!pointer_barriers_.get());
  52   if (pointer_barriers_)
  53     return false;
  54   pointer_barriers_.reset(new XID[4]);
  55   gfx::Rect barrier(bounds());
  56   barrier.Inset(transformer_helper_.GetHostInsets());
  57   // Horizontal, top barriers.
  58   pointer_barriers_[0] = XFixesCreatePointerBarrier(xdisplay(),
  59                                                     x_root_window(),
  60                                                     barrier.x(),
  61                                                     barrier.y(),
  62                                                     barrier.right(),
  63                                                     barrier.y(),
  64                                                     BarrierPositiveY,
  65                                                     0,
  66                                                     XIAllDevices);
  67   // Horizontal, bottom barriers.
  68   pointer_barriers_[1] = XFixesCreatePointerBarrier(xdisplay(),
  69                                                     x_root_window(),
  70                                                     barrier.x(),
  71                                                     barrier.bottom(),
  72                                                     barrier.right(),
  73                                                     barrier.bottom(),
  74                                                     BarrierNegativeY,
  75                                                     0,
  76                                                     XIAllDevices);
  77   // Vertical, left  barriers.
  78   pointer_barriers_[2] = XFixesCreatePointerBarrier(xdisplay(),
  79                                                     x_root_window(),
  80                                                     barrier.x(),
  81                                                     barrier.y(),
  82                                                     barrier.x(),
  83                                                     barrier.bottom(),
  84                                                     BarrierPositiveX,
  85                                                     0,
  86                                                     XIAllDevices);
  87   // Vertical, right barriers.
  88   pointer_barriers_[3] = XFixesCreatePointerBarrier(xdisplay(),
  89                                                     x_root_window(),
  90                                                     barrier.right(),
  91                                                     barrier.y(),
  92                                                     barrier.right(),
  93                                                     barrier.bottom(),
  94                                                     BarrierNegativeX,
  95                                                     0,
  96                                                     XIAllDevices);
  97 #endif
  98   return true;
  99 }
 100
 101 void AshWindowTreeHostX11::UnConfineCursor() {
 102 #if XFIXES_MAJOR >= 5
 103   if (pointer_barriers_) {
 104     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[0]);
 105     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[1]);
 106     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[2]);
 107     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[3]);
 108     pointer_barriers_.reset();
 109   }
 110 #endif
 111 }
 112
 113 void AshWindowTreeHostX11::SetRootWindowTransformer(
 114     scoped_ptr<RootWindowTransformer> transformer) {
 115   transformer_helper_.SetRootWindowTransformer(transformer.Pass());
 116   if (pointer_barriers_) {
 117     UnConfineCursor();
 118     ConfineCursorToRootWindow();
 119   }
 120 }
 121
 122 gfx::Insets AshWindowTreeHostX11::GetHostInsets() const {
 123   return transformer_helper_.GetHostInsets();
 124 }
 125
 126 aura::WindowTreeHost* AshWindowTreeHostX11::AsWindowTreeHost() { return this; }
 127
 128 void AshWindowTreeHostX11::PrepareForShutdown() {
 129   // Block the root window from dispatching events because it is weird for a
 130   // ScreenPositionClient not to be attached to the root window and for
 131   // ui::EventHandlers to be unable to convert the event's location to screen
 132   // coordinates.
 133   window()->SetEventTargeter(
 134       scoped_ptr<ui::EventTargeter>(new ui::NullEventTargeter));
 135
 136   if (ui::PlatformEventSource::GetInstance()) {
 137     // Block X events which are not turned into ui::Events from getting
 138     // processed. (e.g. ConfigureNotify)
 139     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 140   }
 141 }
 142
 143 void AshWindowTreeHostX11::SetBounds(const gfx::Rect& bounds) {
 144   WindowTreeHostX11::SetBounds(bounds);
 145   if (pointer_barriers_) {
 146     UnConfineCursor();
 147     ConfineCursorToRootWindow();
 148   }
 149 }
 150
 151 gfx::Transform AshWindowTreeHostX11::GetRootTransform() const {
 152   return transformer_helper_.GetTransform();
 153 }
 154
 155 void AshWindowTreeHostX11::SetRootTransform(const gfx::Transform& transform) {
 156   transformer_helper_.SetTransform(transform);
 157 }
 158
 159 gfx::Transform AshWindowTreeHostX11::GetInverseRootTransform() const {
 160   return transformer_helper_.GetInverseTransform();
 161 }
 162
 163 void AshWindowTreeHostX11::UpdateRootWindowSize(const gfx::Size& host_size) {
 164   transformer_helper_.UpdateWindowSize(host_size);
 165 }
 166
 167 void AshWindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
 168 #if defined(OS_CHROMEOS)
 169   SetCrOSTapPaused(!show);
 170 #endif
 171 }
 172
 173 void AshWindowTreeHostX11::OnWindowInitialized(aura::Window* window) {}
 174
 175 void AshWindowTreeHostX11::OnHostInitialized(aura::WindowTreeHost* host) {
 176   if (host != AsWindowTreeHost())
 177     return;
 178
 179 #if defined(OS_CHROMEOS)
 180   // We have to enable Tap-to-click by default because the cursor is set to
 181   // visible in Shell::InitRootWindowController.
 182   SetCrOSTapPaused(false);
 183 #endif
 184 }
 185
 186 void AshWindowTreeHostX11::OnConfigureNotify() {
 187   // Always update barrier and mouse location because |bounds_| might
 188   // have already been updated in |SetBounds|.
 189   if (pointer_barriers_) {
 190     UnConfineCursor();
 191     ConfineCursorToRootWindow();
 192   }
 193 }
 194
 195 bool AshWindowTreeHostX11::CanDispatchEvent(const ui::PlatformEvent& event) {
 196   if(!WindowTreeHostX11::CanDispatchEvent(event))
 197     return false;
 198   XEvent* xev = event;
 199   ui::EventType type = ui::EventTypeFromNative(xev);
 200   // For touch event, check if the root window is residing on the according
 201   // touch display.
 202   switch (type) {
 203     case ui::ET_TOUCH_MOVED:
 204     case ui::ET_TOUCH_PRESSED:
 205     case ui::ET_TOUCH_CANCELLED:
 206     case ui::ET_TOUCH_RELEASED: {
 207 #if defined(OS_CHROMEOS)
 208       XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
 209       int64 touch_display_id =
 210           ui::DeviceDataManager::GetInstance()->GetTargetDisplayForTouchDevice(
 211               xiev->deviceid);
 212       // If we don't have record of display id for this touch device, check
 213       // that if the event is within the bound of the root window. Note
 214       // that in multi-monitor case, the event position is in framebuffer
 215       // space so the bounds check will not work so well.
 216       if (touch_display_id == gfx::Display::kInvalidDisplayID) {
 217         if (base::SysInfo::IsRunningOnChromeOS() &&
 218             !bounds().Contains(ui::EventLocationFromNative(xev)))
 219           return false;
 220       } else {
 221         gfx::Screen* screen = gfx::Screen::GetScreenFor(window());
 222         gfx::Display display = screen->GetDisplayNearestWindow(window());
 223         return touch_display_id == display.id();
 224       }
 225 #endif  // defined(OS_CHROMEOS)
 226       return true;
 227     }
 228     default:
 229       return true;
 230   }
 231 }
 232 void AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent(
 233     ui::LocatedEvent* event) {
 234   TranslateLocatedEvent(event);
 235   SendEventToProcessor(event);
 236 }
 237
 238 #if defined(OS_CHROMEOS)
 239 void AshWindowTreeHostX11::SetCrOSTapPaused(bool state) {
 240   if (!ui::IsXInput2Available())
 241     return;
 242   // Temporarily pause tap-to-click when the cursor is hidden.
 243   Atom prop = atom_cache()->GetAtom("Tap Paused");
 244   unsigned char value = state;
 245   const XIDeviceList& dev_list =
 246       ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(xdisplay());
 247
 248   // Only slave pointer devices could possibly have tap-paused property.
 249   for (int i = 0; i < dev_list.count; i++) {
 250     if (dev_list[i].use == XISlavePointer) {
 251       Atom old_type;
 252       int old_format;
 253       unsigned long old_nvalues, bytes;
 254       unsigned char* data;
 255       int result = XIGetProperty(xdisplay(),
 256                                  dev_list[i].deviceid,
 257                                  prop,
 258                                  0,
 259                                  0,
 260                                  False,
 261                                  AnyPropertyType,
 262                                  &old_type,
 263                                  &old_format,
 264                                  &old_nvalues,
 265                                  &bytes,
 266                                  &data);
 267       if (result != Success)
 268         continue;
 269       XFree(data);
 270       XIChangeProperty(xdisplay(),
 271                        dev_list[i].deviceid,
 272                        prop,
 273                        XA_INTEGER,
 274                        8,
 275                        PropModeReplace,
 276                        &value,
 277                        1);
 278     }
 279   }
 280 }
 281 #endif
 282
 283 AshWindowTreeHost* AshWindowTreeHost::Create(
 284     const AshWindowTreeHostInitParams& init_params) {
 285   if (init_params.offscreen)
 286     return new AshWindowTreeHostUnified(init_params.initial_bounds);
 287   return new AshWindowTreeHostX11(init_params.initial_bounds);
 288 }
 289
 290 }  // namespace ash