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),
  37       transformer_helper_(this),
  38       display_ids_(std::make_pair(gfx::Display::kInvalidDisplayID,
  39                                   gfx::Display::kInvalidDisplayID)) {
  40   aura::Env::GetInstance()->AddObserver(this);
  41 }
  42
  43 AshWindowTreeHostX11::~AshWindowTreeHostX11() {
  44   aura::Env::GetInstance()->RemoveObserver(this);
  45   UnConfineCursor();
  46 }
  47
  48 void AshWindowTreeHostX11::ToggleFullScreen() { NOTIMPLEMENTED(); }
  49
  50 bool AshWindowTreeHostX11::ConfineCursorToRootWindow() {
  51 #if XFIXES_MAJOR >= 5
  52   DCHECK(!pointer_barriers_.get());
  53   if (pointer_barriers_)
  54     return false;
  55   pointer_barriers_.reset(new XID[4]);
  56   gfx::Rect barrier(bounds());
  57   barrier.Inset(transformer_helper_.GetHostInsets());
  58   // Horizontal, top barriers.
  59   pointer_barriers_[0] = XFixesCreatePointerBarrier(xdisplay(),
  60                                                     x_root_window(),
  61                                                     barrier.x(),
  62                                                     barrier.y(),
  63                                                     barrier.right(),
  64                                                     barrier.y(),
  65                                                     BarrierPositiveY,
  66                                                     0,
  67                                                     XIAllDevices);
  68   // Horizontal, bottom barriers.
  69   pointer_barriers_[1] = XFixesCreatePointerBarrier(xdisplay(),
  70                                                     x_root_window(),
  71                                                     barrier.x(),
  72                                                     barrier.bottom(),
  73                                                     barrier.right(),
  74                                                     barrier.bottom(),
  75                                                     BarrierNegativeY,
  76                                                     0,
  77                                                     XIAllDevices);
  78   // Vertical, left  barriers.
  79   pointer_barriers_[2] = XFixesCreatePointerBarrier(xdisplay(),
  80                                                     x_root_window(),
  81                                                     barrier.x(),
  82                                                     barrier.y(),
  83                                                     barrier.x(),
  84                                                     barrier.bottom(),
  85                                                     BarrierPositiveX,
  86                                                     0,
  87                                                     XIAllDevices);
  88   // Vertical, right barriers.
  89   pointer_barriers_[3] = XFixesCreatePointerBarrier(xdisplay(),
  90                                                     x_root_window(),
  91                                                     barrier.right(),
  92                                                     barrier.y(),
  93                                                     barrier.right(),
  94                                                     barrier.bottom(),
  95                                                     BarrierNegativeX,
  96                                                     0,
  97                                                     XIAllDevices);
  98 #endif
  99   return true;
 100 }
 101
 102 void AshWindowTreeHostX11::UnConfineCursor() {
 103 #if XFIXES_MAJOR >= 5
 104   if (pointer_barriers_) {
 105     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[0]);
 106     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[1]);
 107     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[2]);
 108     XFixesDestroyPointerBarrier(xdisplay(), pointer_barriers_[3]);
 109     pointer_barriers_.reset();
 110   }
 111 #endif
 112 }
 113
 114 void AshWindowTreeHostX11::SetRootWindowTransformer(
 115     scoped_ptr<RootWindowTransformer> transformer) {
 116   transformer_helper_.SetRootWindowTransformer(transformer.Pass());
 117   if (pointer_barriers_) {
 118     UnConfineCursor();
 119     ConfineCursorToRootWindow();
 120   }
 121 }
 122
 123 gfx::Insets AshWindowTreeHostX11::GetHostInsets() const {
 124   return transformer_helper_.GetHostInsets();
 125 }
 126
 127 aura::WindowTreeHost* AshWindowTreeHostX11::AsWindowTreeHost() { return this; }
 128
 129 void AshWindowTreeHostX11::UpdateDisplayID(int64 id1, int64 id2) {
 130   display_ids_.first = id1;
 131   display_ids_.second = id2;
 132 }
 133
 134 void AshWindowTreeHostX11::PrepareForShutdown() {
 135   // Block the root window from dispatching events because it is weird for a
 136   // ScreenPositionClient not to be attached to the root window and for
 137   // ui::EventHandlers to be unable to convert the event's location to screen
 138   // coordinates.
 139   window()->SetEventTargeter(
 140       scoped_ptr<ui::EventTargeter>(new ui::NullEventTargeter));
 141
 142   if (ui::PlatformEventSource::GetInstance()) {
 143     // Block X events which are not turned into ui::Events from getting
 144     // processed. (e.g. ConfigureNotify)
 145     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 146   }
 147 }
 148
 149 void AshWindowTreeHostX11::SetBounds(const gfx::Rect& bounds) {
 150   WindowTreeHostX11::SetBounds(bounds);
 151   if (pointer_barriers_) {
 152     UnConfineCursor();
 153     ConfineCursorToRootWindow();
 154   }
 155 }
 156
 157 gfx::Transform AshWindowTreeHostX11::GetRootTransform() const {
 158   return transformer_helper_.GetTransform();
 159 }
 160
 161 void AshWindowTreeHostX11::SetRootTransform(const gfx::Transform& transform) {
 162   transformer_helper_.SetTransform(transform);
 163 }
 164
 165 gfx::Transform AshWindowTreeHostX11::GetInverseRootTransform() const {
 166   return transformer_helper_.GetInverseTransform();
 167 }
 168
 169 void AshWindowTreeHostX11::UpdateRootWindowSize(const gfx::Size& host_size) {
 170   transformer_helper_.UpdateWindowSize(host_size);
 171 }
 172
 173 void AshWindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
 174 #if defined(OS_CHROMEOS)
 175   SetCrOSTapPaused(!show);
 176 #endif
 177 }
 178
 179 void AshWindowTreeHostX11::OnWindowInitialized(aura::Window* window) {}
 180
 181 void AshWindowTreeHostX11::OnHostInitialized(aura::WindowTreeHost* host) {
 182   if (host != AsWindowTreeHost())
 183     return;
 184
 185 #if defined(OS_CHROMEOS)
 186   // We have to enable Tap-to-click by default because the cursor is set to
 187   // visible in Shell::InitRootWindowController.
 188   SetCrOSTapPaused(false);
 189 #endif
 190 }
 191
 192 void AshWindowTreeHostX11::OnConfigureNotify() {
 193   // Always update barrier and mouse location because |bounds_| might
 194   // have already been updated in |SetBounds|.
 195   if (pointer_barriers_) {
 196     UnConfineCursor();
 197     ConfineCursorToRootWindow();
 198   }
 199 }
 200
 201 bool AshWindowTreeHostX11::CanDispatchEvent(const ui::PlatformEvent& event) {
 202   if(!WindowTreeHostX11::CanDispatchEvent(event))
 203     return false;
 204   XEvent* xev = event;
 205   ui::EventType type = ui::EventTypeFromNative(xev);
 206   // For touch event, check if the root window is residing on the according
 207   // touch display.
 208   switch (type) {
 209     case ui::ET_TOUCH_MOVED:
 210     case ui::ET_TOUCH_PRESSED:
 211     case ui::ET_TOUCH_CANCELLED:
 212     case ui::ET_TOUCH_RELEASED: {
 213 #if defined(OS_CHROMEOS)
 214       XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
 215       int64 touch_display_id =
 216           ui::DeviceDataManager::GetInstance()->GetDisplayForTouchDevice(
 217               xiev->deviceid);
 218       // If we don't have record of display id for this touch device, check
 219       // that if the event is within the bound of the root window. Note
 220       // that in multi-monitor case, the event position is in framebuffer
 221       // space so the bounds check will not work so well.
 222       if (touch_display_id == gfx::Display::kInvalidDisplayID) {
 223         if (base::SysInfo::IsRunningOnChromeOS() &&
 224             !bounds().Contains(ui::EventLocationFromNative(xev)))
 225           return false;
 226       } else if (touch_display_id != display_ids_.first &&
 227                  touch_display_id != display_ids_.second) {
 228         return false;
 229       }
 230 #endif  // defined(OS_CHROMEOS)
 231       return true;
 232     }
 233     default:
 234       return true;
 235   }
 236 }
 237 void AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent(
 238     ui::LocatedEvent* event) {
 239   TranslateLocatedEvent(event);
 240   SendEventToProcessor(event);
 241 }
 242
 243 #if defined(OS_CHROMEOS)
 244 void AshWindowTreeHostX11::SetCrOSTapPaused(bool state) {
 245   if (!ui::IsXInput2Available())
 246     return;
 247   // Temporarily pause tap-to-click when the cursor is hidden.
 248   Atom prop = atom_cache()->GetAtom("Tap Paused");
 249   unsigned char value = state;
 250   XIDeviceList dev_list =
 251       ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(xdisplay());
 252
 253   // Only slave pointer devices could possibly have tap-paused property.
 254   for (int i = 0; i < dev_list.count; i++) {
 255     if (dev_list[i].use == XISlavePointer) {
 256       Atom old_type;
 257       int old_format;
 258       unsigned long old_nvalues, bytes;
 259       unsigned char* data;
 260       int result = XIGetProperty(xdisplay(),
 261                                  dev_list[i].deviceid,
 262                                  prop,
 263                                  0,
 264                                  0,
 265                                  False,
 266                                  AnyPropertyType,
 267                                  &old_type,
 268                                  &old_format,
 269                                  &old_nvalues,
 270                                  &bytes,
 271                                  &data);
 272       if (result != Success)
 273         continue;
 274       XFree(data);
 275       XIChangeProperty(xdisplay(),
 276                        dev_list[i].deviceid,
 277                        prop,
 278                        XA_INTEGER,
 279                        8,
 280                        PropModeReplace,
 281                        &value,
 282                        1);
 283     }
 284   }
 285 }
 286 #endif
 287
 288 AshWindowTreeHost* AshWindowTreeHost::Create(
 289     const AshWindowTreeHostInitParams& init_params) {
 290   return new AshWindowTreeHostX11(init_params.initial_bounds);
 291 }
 292
 293 }  // namespace ash