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