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 "ash/ime/input_method_event_handler.h"
  19 #include "base/basictypes.h"
  20 #include "base/sys_info.h"
  21 #include "ui/aura/env.h"
  22 #include "ui/aura/window.h"
  23 #include "ui/aura/window_event_dispatcher.h"
  24 #include "ui/base/x/x11_util.h"
  25 #include "ui/events/devices/device_data_manager.h"
  26 #include "ui/events/devices/x11/device_list_cache_x11.h"
  27 #include "ui/events/devices/x11/touch_factory_x11.h"
  28 #include "ui/events/event.h"
  29 #include "ui/events/event_utils.h"
  30 #include "ui/events/null_event_targeter.h"
  31 #include "ui/events/platform/platform_event_source.h"
  32 #include "ui/gfx/geometry/rect.h"
  33 #include "ui/gfx/screen.h"
  34
  35 namespace ash {
  36
  37 AshWindowTreeHostX11::AshWindowTreeHostX11(const gfx::Rect& initial_bounds)
  38     : WindowTreeHostX11(initial_bounds), transformer_helper_(this) {
  39   transformer_helper_.Init();
  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::PrepareForShutdown() {
 130   // Block the root window from dispatching events because it is weird for a
 131   // ScreenPositionClient not to be attached to the root window and for
 132   // ui::EventHandlers to be unable to convert the event's location to screen
 133   // coordinates.
 134   window()->SetEventTargeter(
 135       scoped_ptr<ui::EventTargeter>(new ui::NullEventTargeter));
 136
 137   if (ui::PlatformEventSource::GetInstance()) {
 138     // Block X events which are not turned into ui::Events from getting
 139     // processed. (e.g. ConfigureNotify)
 140     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 141   }
 142 }
 143
 144 void AshWindowTreeHostX11::SetBounds(const gfx::Rect& bounds) {
 145   WindowTreeHostX11::SetBounds(bounds);
 146   if (pointer_barriers_) {
 147     UnConfineCursor();
 148     ConfineCursorToRootWindow();
 149   }
 150 }
 151
 152 gfx::Transform AshWindowTreeHostX11::GetRootTransform() const {
 153   return transformer_helper_.GetTransform();
 154 }
 155
 156 void AshWindowTreeHostX11::SetRootTransform(const gfx::Transform& transform) {
 157   transformer_helper_.SetTransform(transform);
 158 }
 159
 160 gfx::Transform AshWindowTreeHostX11::GetInverseRootTransform() const {
 161   return transformer_helper_.GetInverseTransform();
 162 }
 163
 164 void AshWindowTreeHostX11::UpdateRootWindowSize(const gfx::Size& host_size) {
 165   transformer_helper_.UpdateWindowSize(host_size);
 166 }
 167
 168 void AshWindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
 169 #if defined(OS_CHROMEOS)
 170   SetCrOSTapPaused(!show);
 171 #endif
 172 }
 173
 174 void AshWindowTreeHostX11::OnWindowInitialized(aura::Window* window) {}
 175
 176 void AshWindowTreeHostX11::OnHostInitialized(aura::WindowTreeHost* host) {
 177   if (host != AsWindowTreeHost())
 178     return;
 179
 180 #if defined(OS_CHROMEOS)
 181   // We have to enable Tap-to-click by default because the cursor is set to
 182   // visible in Shell::InitRootWindowController.
 183   SetCrOSTapPaused(false);
 184 #endif
 185 }
 186
 187 void AshWindowTreeHostX11::OnConfigureNotify() {
 188   // Always update barrier and mouse location because |bounds_| might
 189   // have already been updated in |SetBounds|.
 190   if (pointer_barriers_) {
 191     UnConfineCursor();
 192     ConfineCursorToRootWindow();
 193   }
 194 }
 195
 196 bool AshWindowTreeHostX11::CanDispatchEvent(const ui::PlatformEvent& event) {
 197   if(!WindowTreeHostX11::CanDispatchEvent(event))
 198     return false;
 199   XEvent* xev = event;
 200   ui::EventType type = ui::EventTypeFromNative(xev);
 201   // For touch event, check if the root window is residing on the according
 202   // touch display.
 203   switch (type) {
 204     case ui::ET_TOUCH_MOVED:
 205     case ui::ET_TOUCH_PRESSED:
 206     case ui::ET_TOUCH_CANCELLED:
 207     case ui::ET_TOUCH_RELEASED: {
 208 #if defined(OS_CHROMEOS)
 209       XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
 210       int64 touch_display_id =
 211           ui::DeviceDataManager::GetInstance()->GetTargetDisplayForTouchDevice(
 212               xiev->deviceid);
 213       // If we don't have record of display id for this touch device, check
 214       // that if the event is within the bound of the root window. Note
 215       // that in multi-monitor case, the event position is in framebuffer
 216       // space so the bounds check will not work so well.
 217       if (touch_display_id == gfx::Display::kInvalidDisplayID) {
 218         if (base::SysInfo::IsRunningOnChromeOS() &&
 219             !bounds().Contains(ui::EventLocationFromNative(xev)))
 220           return false;
 221       } else {
 222         gfx::Screen* screen = gfx::Screen::GetScreenFor(window());
 223         gfx::Display display = screen->GetDisplayNearestWindow(window());
 224         return touch_display_id == display.id();
 225       }
 226 #endif  // defined(OS_CHROMEOS)
 227       return true;
 228     }
 229     default:
 230       return true;
 231   }
 232 }
 233 void AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent(
 234     ui::LocatedEvent* event) {
 235   TranslateLocatedEvent(event);
 236   SendEventToProcessor(event);
 237 }
 238
 239 ui::EventDispatchDetails AshWindowTreeHostX11::DispatchKeyEventPostIME(
 240     ui::KeyEvent* event) {
 241   input_method_handler()->SetPostIME(true);
 242   ui::EventDispatchDetails details =
 243       event_processor()->OnEventFromSource(event);
 244   if (!details.dispatcher_destroyed)
 245     input_method_handler()->SetPostIME(false);
 246   return details;
 247 }
 248
 249 #if defined(OS_CHROMEOS)
 250 void AshWindowTreeHostX11::SetCrOSTapPaused(bool state) {
 251   if (!ui::IsXInput2Available())
 252     return;
 253   // Temporarily pause tap-to-click when the cursor is hidden.
 254   Atom prop = atom_cache()->GetAtom("Tap Paused");
 255   unsigned char value = state;
 256   const XIDeviceList& dev_list =
 257       ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(xdisplay());
 258
 259   // Only slave pointer devices could possibly have tap-paused property.
 260   for (int i = 0; i < dev_list.count; i++) {
 261     if (dev_list[i].use == XISlavePointer) {
 262       Atom old_type;
 263       int old_format;
 264       unsigned long old_nvalues, bytes;
 265       unsigned char* data;
 266       int result = XIGetProperty(xdisplay(),
 267                                  dev_list[i].deviceid,
 268                                  prop,
 269                                  0,
 270                                  0,
 271                                  False,
 272                                  AnyPropertyType,
 273                                  &old_type,
 274                                  &old_format,
 275                                  &old_nvalues,
 276                                  &bytes,
 277                                  &data);
 278       if (result != Success)
 279         continue;
 280       XFree(data);
 281       XIChangeProperty(xdisplay(),
 282                        dev_list[i].deviceid,
 283                        prop,
 284                        XA_INTEGER,
 285                        8,
 286                        PropModeReplace,
 287                        &value,
 288                        1);
 289     }
 290   }
 291 }
 292 #endif
 293
 294 AshWindowTreeHost* AshWindowTreeHost::Create(
 295     const AshWindowTreeHostInitParams& init_params) {
 296   if (init_params.offscreen)
 297     return new AshWindowTreeHostUnified(init_params.initial_bounds);
 298   return new AshWindowTreeHostX11(init_params.initial_bounds);
 299 }
 300
 301 }  // namespace ash