ui/views/widget/desktop_aura/desktop_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/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
   6
   7 #include <X11/extensions/shape.h>
   8 #include <X11/extensions/XInput2.h>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xregion.h>
  11 #include <X11/Xutil.h>
  12
  13 #include "base/basictypes.h"
  14 #include "base/command_line.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "base/trace_event/trace_event.h"
  18 #include "third_party/skia/include/core/SkPath.h"
  19 #include "ui/aura/client/cursor_client.h"
  20 #include "ui/aura/client/focus_client.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/aura/window_event_dispatcher.h"
  23 #include "ui/aura/window_property.h"
  24 #include "ui/base/dragdrop/os_exchange_data_provider_aurax11.h"
  25 #include "ui/base/hit_test.h"
  26 #include "ui/base/ime/input_method.h"
  27 #include "ui/base/x/x11_util.h"
  28 #include "ui/events/devices/x11/device_data_manager_x11.h"
  29 #include "ui/events/devices/x11/device_list_cache_x11.h"
  30 #include "ui/events/devices/x11/touch_factory_x11.h"
  31 #include "ui/events/event_utils.h"
  32 #include "ui/events/platform/platform_event_source.h"
  33 #include "ui/events/platform/x11/x11_event_source.h"
  34 #include "ui/gfx/display.h"
  35 #include "ui/gfx/geometry/insets.h"
  36 #include "ui/gfx/geometry/size_conversions.h"
  37 #include "ui/gfx/image/image_skia.h"
  38 #include "ui/gfx/image/image_skia_rep.h"
  39 #include "ui/gfx/path.h"
  40 #include "ui/gfx/path_x11.h"
  41 #include "ui/gfx/screen.h"
  42 #include "ui/native_theme/native_theme.h"
  43 #include "ui/views/corewm/tooltip_aura.h"
  44 #include "ui/views/linux_ui/linux_ui.h"
  45 #include "ui/views/views_delegate.h"
  46 #include "ui/views/views_switches.h"
  47 #include "ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.h"
  48 #include "ui/views/widget/desktop_aura/desktop_native_cursor_manager.h"
  49 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
  50 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_observer_x11.h"
  51 #include "ui/views/widget/desktop_aura/x11_desktop_handler.h"
  52 #include "ui/views/widget/desktop_aura/x11_desktop_window_move_client.h"
  53 #include "ui/views/widget/desktop_aura/x11_pointer_grab.h"
  54 #include "ui/views/widget/desktop_aura/x11_window_event_filter.h"
  55 #include "ui/wm/core/compound_event_filter.h"
  56 #include "ui/wm/core/window_util.h"
  57
  58 DECLARE_WINDOW_PROPERTY_TYPE(views::DesktopWindowTreeHostX11*);
  59
  60 namespace views {
  61
  62 DesktopWindowTreeHostX11* DesktopWindowTreeHostX11::g_current_capture =
  63     NULL;
  64 std::list<XID>* DesktopWindowTreeHostX11::open_windows_ = NULL;
  65
  66 DEFINE_WINDOW_PROPERTY_KEY(
  67     aura::Window*, kViewsWindowForRootWindow, NULL);
  68
  69 DEFINE_WINDOW_PROPERTY_KEY(
  70     DesktopWindowTreeHostX11*, kHostForRootWindow, NULL);
  71
  72 namespace {
  73
  74 // Constants that are part of EWMH.
  75 const int k_NET_WM_STATE_ADD = 1;
  76 const int k_NET_WM_STATE_REMOVE = 0;
  77
  78 // Special value of the _NET_WM_DESKTOP property which indicates that the window
  79 // should appear on all desktops.
  80 const int kAllDesktops = 0xFFFFFFFF;
  81
  82 const char* kAtomsToCache[] = {
  83   "UTF8_STRING",
  84   "WM_DELETE_WINDOW",
  85   "WM_PROTOCOLS",
  86   "_NET_FRAME_EXTENTS",
  87   "_NET_WM_CM_S0",
  88   "_NET_WM_DESKTOP",
  89   "_NET_WM_ICON",
  90   "_NET_WM_NAME",
  91   "_NET_WM_PID",
  92   "_NET_WM_PING",
  93   "_NET_WM_STATE",
  94   "_NET_WM_STATE_ABOVE",
  95   "_NET_WM_STATE_FULLSCREEN",
  96   "_NET_WM_STATE_HIDDEN",
  97   "_NET_WM_STATE_MAXIMIZED_HORZ",
  98   "_NET_WM_STATE_MAXIMIZED_VERT",
  99   "_NET_WM_STATE_SKIP_TASKBAR",
 100   "_NET_WM_STATE_STICKY",
 101   "_NET_WM_USER_TIME",
 102   "_NET_WM_WINDOW_OPACITY",
 103   "_NET_WM_WINDOW_TYPE",
 104   "_NET_WM_WINDOW_TYPE_DND",
 105   "_NET_WM_WINDOW_TYPE_MENU",
 106   "_NET_WM_WINDOW_TYPE_NORMAL",
 107   "_NET_WM_WINDOW_TYPE_NOTIFICATION",
 108   "_NET_WM_WINDOW_TYPE_TOOLTIP",
 109   "XdndActionAsk",
 110   "XdndActionCopy"
 111   "XdndActionLink",
 112   "XdndActionList",
 113   "XdndActionMove",
 114   "XdndActionPrivate",
 115   "XdndAware",
 116   "XdndDrop",
 117   "XdndEnter",
 118   "XdndFinished",
 119   "XdndLeave",
 120   "XdndPosition",
 121   "XdndProxy",  // Proxy windows?
 122   "XdndSelection",
 123   "XdndStatus",
 124   "XdndTypeList",
 125   NULL
 126 };
 127
 128 const char kX11WindowRolePopup[] = "popup";
 129 const char kX11WindowRoleBubble[] = "bubble";
 130
 131 // Returns the whole path from |window| to the root.
 132 std::vector<::Window> GetParentsList(XDisplay* xdisplay, ::Window window) {
 133   ::Window parent_win, root_win;
 134   Window* child_windows;
 135   unsigned int num_child_windows;
 136   std::vector<::Window> result;
 137
 138   while (window) {
 139     result.push_back(window);
 140     if (!XQueryTree(xdisplay, window,
 141                     &root_win, &parent_win, &child_windows, &num_child_windows))
 142       break;
 143     if (child_windows)
 144       XFree(child_windows);
 145     window = parent_win;
 146   }
 147   return result;
 148 }
 149
 150 }  // namespace
 151
 152 ////////////////////////////////////////////////////////////////////////////////
 153 // DesktopWindowTreeHostX11, public:
 154
 155 DesktopWindowTreeHostX11::DesktopWindowTreeHostX11(
 156     internal::NativeWidgetDelegate* native_widget_delegate,
 157     DesktopNativeWidgetAura* desktop_native_widget_aura)
 158     : xdisplay_(gfx::GetXDisplay()),
 159       xwindow_(0),
 160       x_root_window_(DefaultRootWindow(xdisplay_)),
 161       atom_cache_(xdisplay_, kAtomsToCache),
 162       window_mapped_(false),
 163       is_fullscreen_(false),
 164       is_always_on_top_(false),
 165       use_native_frame_(false),
 166       should_maximize_after_map_(false),
 167       use_argb_visual_(false),
 168       drag_drop_client_(NULL),
 169       native_widget_delegate_(native_widget_delegate),
 170       desktop_native_widget_aura_(desktop_native_widget_aura),
 171       content_window_(NULL),
 172       window_parent_(NULL),
 173       custom_window_shape_(false),
 174       urgency_hint_set_(false),
 175       close_widget_factory_(this) {
 176 }
 177
 178 DesktopWindowTreeHostX11::~DesktopWindowTreeHostX11() {
 179   window()->ClearProperty(kHostForRootWindow);
 180   aura::client::SetWindowMoveClient(window(), NULL);
 181   desktop_native_widget_aura_->OnDesktopWindowTreeHostDestroyed(this);
 182   DestroyDispatcher();
 183 }
 184
 185 // static
 186 aura::Window* DesktopWindowTreeHostX11::GetContentWindowForXID(XID xid) {
 187   aura::WindowTreeHost* host =
 188       aura::WindowTreeHost::GetForAcceleratedWidget(xid);
 189   return host ? host->window()->GetProperty(kViewsWindowForRootWindow) : NULL;
 190 }
 191
 192 // static
 193 DesktopWindowTreeHostX11* DesktopWindowTreeHostX11::GetHostForXID(XID xid) {
 194   aura::WindowTreeHost* host =
 195       aura::WindowTreeHost::GetForAcceleratedWidget(xid);
 196   return host ? host->window()->GetProperty(kHostForRootWindow) : NULL;
 197 }
 198
 199 // static
 200 std::vector<aura::Window*> DesktopWindowTreeHostX11::GetAllOpenWindows() {
 201   std::vector<aura::Window*> windows(open_windows().size());
 202   std::transform(open_windows().begin(),
 203                  open_windows().end(),
 204                  windows.begin(),
 205                  GetContentWindowForXID);
 206   return windows;
 207 }
 208
 209 gfx::Rect DesktopWindowTreeHostX11::GetX11RootWindowBounds() const {
 210   return bounds_in_pixels_;
 211 }
 212
 213 gfx::Rect DesktopWindowTreeHostX11::GetX11RootWindowOuterBounds() const {
 214   gfx::Rect outer_bounds(bounds_in_pixels_);
 215   outer_bounds.Inset(-native_window_frame_borders_in_pixels_);
 216   return outer_bounds;
 217 }
 218
 219 ::Region DesktopWindowTreeHostX11::GetWindowShape() const {
 220   return window_shape_.get();
 221 }
 222
 223 void DesktopWindowTreeHostX11::HandleNativeWidgetActivationChanged(
 224     bool active) {
 225   if (active) {
 226     FlashFrame(false);
 227     OnHostActivated();
 228     open_windows().remove(xwindow_);
 229     open_windows().insert(open_windows().begin(), xwindow_);
 230   } else {
 231     ReleaseCapture();
 232   }
 233
 234   desktop_native_widget_aura_->HandleActivationChanged(active);
 235
 236   native_widget_delegate_->AsWidget()->GetRootView()->SchedulePaint();
 237 }
 238
 239 void DesktopWindowTreeHostX11::AddObserver(
 240     views::DesktopWindowTreeHostObserverX11* observer) {
 241   observer_list_.AddObserver(observer);
 242 }
 243
 244 void DesktopWindowTreeHostX11::RemoveObserver(
 245     views::DesktopWindowTreeHostObserverX11* observer) {
 246   observer_list_.RemoveObserver(observer);
 247 }
 248
 249 void DesktopWindowTreeHostX11::SwapNonClientEventHandler(
 250     scoped_ptr<ui::EventHandler> handler) {
 251   wm::CompoundEventFilter* compound_event_filter =
 252       desktop_native_widget_aura_->root_window_event_filter();
 253   if (x11_non_client_event_filter_)
 254     compound_event_filter->RemoveHandler(x11_non_client_event_filter_.get());
 255   compound_event_filter->AddHandler(handler.get());
 256   x11_non_client_event_filter_ = handler.Pass();
 257 }
 258
 259 void DesktopWindowTreeHostX11::CleanUpWindowList(
 260     void (*func)(aura::Window* window)) {
 261   if (!open_windows_)
 262     return;
 263   while (!open_windows_->empty()) {
 264     XID xid = open_windows_->front();
 265     func(GetContentWindowForXID(xid));
 266     if (!open_windows_->empty() && open_windows_->front() == xid)
 267       open_windows_->erase(open_windows_->begin());
 268   }
 269
 270   delete open_windows_;
 271   open_windows_ = NULL;
 272 }
 273
 274 ////////////////////////////////////////////////////////////////////////////////
 275 // DesktopWindowTreeHostX11, DesktopWindowTreeHost implementation:
 276
 277 void DesktopWindowTreeHostX11::Init(aura::Window* content_window,
 278                                     const Widget::InitParams& params) {
 279   content_window_ = content_window;
 280
 281   // TODO(erg): Check whether we *should* be building a WindowTreeHost here, or
 282   // whether we should be proxying requests to another DRWHL.
 283
 284   // In some situations, views tries to make a zero sized window, and that
 285   // makes us crash. Make sure we have valid sizes.
 286   Widget::InitParams sanitized_params = params;
 287   if (sanitized_params.bounds.width() == 0)
 288     sanitized_params.bounds.set_width(100);
 289   if (sanitized_params.bounds.height() == 0)
 290     sanitized_params.bounds.set_height(100);
 291
 292   InitX11Window(sanitized_params);
 293 }
 294
 295 void DesktopWindowTreeHostX11::OnNativeWidgetCreated(
 296     const Widget::InitParams& params) {
 297   window()->SetProperty(kViewsWindowForRootWindow, content_window_);
 298   window()->SetProperty(kHostForRootWindow, this);
 299
 300   // Ensure that the X11DesktopHandler exists so that it dispatches activation
 301   // messages to us.
 302   X11DesktopHandler::get();
 303
 304   // TODO(erg): Unify this code once the other consumer goes away.
 305   SwapNonClientEventHandler(
 306       scoped_ptr<ui::EventHandler>(new X11WindowEventFilter(this)).Pass());
 307   SetUseNativeFrame(params.type == Widget::InitParams::TYPE_WINDOW &&
 308                     !params.remove_standard_frame);
 309
 310   x11_window_move_client_.reset(new X11DesktopWindowMoveClient);
 311   aura::client::SetWindowMoveClient(window(), x11_window_move_client_.get());
 312
 313   SetWindowTransparency();
 314
 315   native_widget_delegate_->OnNativeWidgetCreated(true);
 316 }
 317
 318 scoped_ptr<corewm::Tooltip> DesktopWindowTreeHostX11::CreateTooltip() {
 319   return make_scoped_ptr(new corewm::TooltipAura);
 320 }
 321
 322 scoped_ptr<aura::client::DragDropClient>
 323 DesktopWindowTreeHostX11::CreateDragDropClient(
 324     DesktopNativeCursorManager* cursor_manager) {
 325   drag_drop_client_ = new DesktopDragDropClientAuraX11(
 326       window(), cursor_manager, xdisplay_, xwindow_);
 327   drag_drop_client_->Init();
 328   return make_scoped_ptr(drag_drop_client_);
 329 }
 330
 331 void DesktopWindowTreeHostX11::Close() {
 332   // TODO(erg): Might need to do additional hiding tasks here.
 333   delayed_resize_task_.Cancel();
 334
 335   if (!close_widget_factory_.HasWeakPtrs()) {
 336     // And we delay the close so that if we are called from an ATL callback,
 337     // we don't destroy the window before the callback returned (as the caller
 338     // may delete ourselves on destroy and the ATL callback would still
 339     // dereference us when the callback returns).
 340     base::MessageLoop::current()->PostTask(
 341         FROM_HERE,
 342         base::Bind(&DesktopWindowTreeHostX11::CloseNow,
 343                    close_widget_factory_.GetWeakPtr()));
 344   }
 345 }
 346
 347 void DesktopWindowTreeHostX11::CloseNow() {
 348   if (xwindow_ == None)
 349     return;
 350
 351   ReleaseCapture();
 352   native_widget_delegate_->OnNativeWidgetDestroying();
 353
 354   // If we have children, close them. Use a copy for iteration because they'll
 355   // remove themselves.
 356   std::set<DesktopWindowTreeHostX11*> window_children_copy = window_children_;
 357   for (std::set<DesktopWindowTreeHostX11*>::iterator it =
 358            window_children_copy.begin(); it != window_children_copy.end();
 359        ++it) {
 360     (*it)->CloseNow();
 361   }
 362   DCHECK(window_children_.empty());
 363
 364   // If we have a parent, remove ourselves from its children list.
 365   if (window_parent_) {
 366     window_parent_->window_children_.erase(this);
 367     window_parent_ = NULL;
 368   }
 369
 370   // Remove the event listeners we've installed. We need to remove these
 371   // because otherwise we get assert during ~WindowEventDispatcher().
 372   desktop_native_widget_aura_->root_window_event_filter()->RemoveHandler(
 373       x11_non_client_event_filter_.get());
 374   x11_non_client_event_filter_.reset();
 375
 376   // Destroy the compositor before destroying the |xwindow_| since shutdown
 377   // may try to swap, and the swap without a window causes an X error, which
 378   // causes a crash with in-process renderer.
 379   DestroyCompositor();
 380
 381   open_windows().remove(xwindow_);
 382   // Actually free our native resources.
 383   if (ui::PlatformEventSource::GetInstance())
 384     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 385   XDestroyWindow(xdisplay_, xwindow_);
 386   xwindow_ = None;
 387
 388   desktop_native_widget_aura_->OnHostClosed();
 389 }
 390
 391 aura::WindowTreeHost* DesktopWindowTreeHostX11::AsWindowTreeHost() {
 392   return this;
 393 }
 394
 395 void DesktopWindowTreeHostX11::ShowWindowWithState(
 396     ui::WindowShowState show_state) {
 397   if (compositor())
 398     compositor()->SetVisible(true);
 399   if (!window_mapped_)
 400     MapWindow(show_state);
 401
 402   switch (show_state) {
 403     case ui::SHOW_STATE_NORMAL:
 404       Activate();
 405       break;
 406     case ui::SHOW_STATE_MAXIMIZED:
 407       Maximize();
 408       break;
 409     case ui::SHOW_STATE_MINIMIZED:
 410       Minimize();
 411       break;
 412     case ui::SHOW_STATE_FULLSCREEN:
 413       SetFullscreen(true);
 414       break;
 415     default:
 416       break;
 417   }
 418
 419   native_widget_delegate_->AsWidget()->SetInitialFocus(show_state);
 420 }
 421
 422 void DesktopWindowTreeHostX11::ShowMaximizedWithBounds(
 423     const gfx::Rect& restored_bounds) {
 424   ShowWindowWithState(ui::SHOW_STATE_MAXIMIZED);
 425   // Enforce |restored_bounds_in_pixels_| since calling Maximize() could have
 426   // reset it.
 427   restored_bounds_in_pixels_ = ToPixelRect(restored_bounds);
 428 }
 429
 430 bool DesktopWindowTreeHostX11::IsVisible() const {
 431   return window_mapped_;
 432 }
 433
 434 void DesktopWindowTreeHostX11::SetSize(const gfx::Size& requested_size) {
 435   gfx::Size size_in_pixels = ToPixelRect(gfx::Rect(requested_size)).size();
 436   size_in_pixels = AdjustSize(size_in_pixels);
 437   bool size_changed = bounds_in_pixels_.size() != size_in_pixels;
 438   XResizeWindow(xdisplay_, xwindow_, size_in_pixels.width(),
 439                 size_in_pixels.height());
 440   bounds_in_pixels_.set_size(size_in_pixels);
 441   if (size_changed) {
 442     OnHostResized(size_in_pixels);
 443     ResetWindowRegion();
 444   }
 445 }
 446
 447 void DesktopWindowTreeHostX11::StackAbove(aura::Window* window) {
 448   if (window && window->GetRootWindow()) {
 449     ::Window window_below = window->GetHost()->GetAcceleratedWidget();
 450     // Find all parent windows up to the root.
 451     std::vector<::Window> window_below_parents =
 452         GetParentsList(xdisplay_, window_below);
 453     std::vector<::Window> window_above_parents =
 454         GetParentsList(xdisplay_, xwindow_);
 455
 456     // Find their common ancestor.
 457     auto it_below_window = window_below_parents.rbegin();
 458     auto it_above_window = window_above_parents.rbegin();
 459     for (; it_below_window != window_below_parents.rend() &&
 460            it_above_window != window_above_parents.rend() &&
 461            *it_below_window == *it_above_window;
 462          ++it_below_window, ++it_above_window) {
 463     }
 464
 465     if (it_below_window != window_below_parents.rend() &&
 466         it_above_window != window_above_parents.rend()) {
 467       // First stack |xwindow_| below so Z-order of |window| stays the same.
 468       ::Window windows[] = {*it_below_window, *it_above_window};
 469       if (XRestackWindows(xdisplay_, windows, 2) == 0) {
 470         // Now stack them properly.
 471         std::swap(windows[0], windows[1]);
 472         XRestackWindows(xdisplay_, windows, 2);
 473       }
 474     }
 475   }
 476 }
 477
 478 void DesktopWindowTreeHostX11::StackAtTop() {
 479   XRaiseWindow(xdisplay_, xwindow_);
 480 }
 481
 482 void DesktopWindowTreeHostX11::CenterWindow(const gfx::Size& size) {
 483   gfx::Size size_in_pixels = ToPixelRect(gfx::Rect(size)).size();
 484   gfx::Rect parent_bounds_in_pixels = GetWorkAreaBoundsInPixels();
 485
 486   // If |window_|'s transient parent bounds are big enough to contain |size|,
 487   // use them instead.
 488   if (wm::GetTransientParent(content_window_)) {
 489     gfx::Rect transient_parent_rect =
 490         wm::GetTransientParent(content_window_)->GetBoundsInScreen();
 491     if (transient_parent_rect.height() >= size.height() &&
 492         transient_parent_rect.width() >= size.width()) {
 493       parent_bounds_in_pixels = ToPixelRect(transient_parent_rect);
 494     }
 495   }
 496
 497   gfx::Rect window_bounds_in_pixels(
 498       parent_bounds_in_pixels.x() +
 499           (parent_bounds_in_pixels.width() - size_in_pixels.width()) / 2,
 500       parent_bounds_in_pixels.y() +
 501           (parent_bounds_in_pixels.height() - size_in_pixels.height()) / 2,
 502       size_in_pixels.width(), size_in_pixels.height());
 503   // Don't size the window bigger than the parent, otherwise the user may not be
 504   // able to close or move it.
 505   window_bounds_in_pixels.AdjustToFit(parent_bounds_in_pixels);
 506
 507   SetBounds(window_bounds_in_pixels);
 508 }
 509
 510 void DesktopWindowTreeHostX11::GetWindowPlacement(
 511     gfx::Rect* bounds,
 512     ui::WindowShowState* show_state) const {
 513   *bounds = GetRestoredBounds();
 514
 515   if (IsFullscreen()) {
 516     *show_state = ui::SHOW_STATE_FULLSCREEN;
 517   } else if (IsMinimized()) {
 518     *show_state = ui::SHOW_STATE_MINIMIZED;
 519   } else if (IsMaximized()) {
 520     *show_state = ui::SHOW_STATE_MAXIMIZED;
 521   } else if (!IsActive()) {
 522     *show_state = ui::SHOW_STATE_INACTIVE;
 523   } else {
 524     *show_state = ui::SHOW_STATE_NORMAL;
 525   }
 526 }
 527
 528 gfx::Rect DesktopWindowTreeHostX11::GetWindowBoundsInScreen() const {
 529   return ToDIPRect(bounds_in_pixels_);
 530 }
 531
 532 gfx::Rect DesktopWindowTreeHostX11::GetClientAreaBoundsInScreen() const {
 533   // TODO(erg): The NativeWidgetAura version returns |bounds_in_pixels_|,
 534   // claiming it's needed for View::ConvertPointToScreen() to work correctly.
 535   // DesktopWindowTreeHostWin::GetClientAreaBoundsInScreen() just asks windows
 536   // what it thinks the client rect is.
 537   //
 538   // Attempts to calculate the rect by asking the NonClientFrameView what it
 539   // thought its GetBoundsForClientView() were broke combobox drop down
 540   // placement.
 541   return GetWindowBoundsInScreen();
 542 }
 543
 544 gfx::Rect DesktopWindowTreeHostX11::GetRestoredBounds() const {
 545   // We can't reliably track the restored bounds of a window, but we can get
 546   // the 90% case down. When *chrome* is the process that requests maximizing
 547   // or restoring bounds, we can record the current bounds before we request
 548   // maximization, and clear it when we detect a state change.
 549   if (!restored_bounds_in_pixels_.IsEmpty())
 550     return ToDIPRect(restored_bounds_in_pixels_);
 551
 552   return GetWindowBoundsInScreen();
 553 }
 554
 555 gfx::Rect DesktopWindowTreeHostX11::GetWorkAreaBoundsInScreen() const {
 556   return ToDIPRect(GetWorkAreaBoundsInPixels());
 557 }
 558
 559 void DesktopWindowTreeHostX11::SetShape(SkRegion* native_region) {
 560   custom_window_shape_ = false;
 561   window_shape_.reset();
 562
 563   if (native_region) {
 564     gfx::Transform transform = GetRootTransform();
 565     if (!transform.IsIdentity() && !native_region->isEmpty()) {
 566       SkPath path_in_dip;
 567       if (native_region->getBoundaryPath(&path_in_dip)) {
 568         SkPath path_in_pixels;
 569         path_in_dip.transform(transform.matrix(), &path_in_pixels);
 570         window_shape_.reset(gfx::CreateRegionFromSkPath(path_in_pixels));
 571       } else {
 572         window_shape_.reset(XCreateRegion());
 573       }
 574     } else {
 575       window_shape_.reset(gfx::CreateRegionFromSkRegion(*native_region));
 576     }
 577
 578     custom_window_shape_ = true;
 579     delete native_region;
 580   }
 581   ResetWindowRegion();
 582 }
 583
 584 void DesktopWindowTreeHostX11::Activate() {
 585   if (!window_mapped_)
 586     return;
 587
 588   X11DesktopHandler::get()->ActivateWindow(xwindow_);
 589 }
 590
 591 void DesktopWindowTreeHostX11::Deactivate() {
 592   if (!IsActive())
 593     return;
 594
 595   ReleaseCapture();
 596   X11DesktopHandler::get()->DeactivateWindow(xwindow_);
 597 }
 598
 599 bool DesktopWindowTreeHostX11::IsActive() const {
 600   return X11DesktopHandler::get()->IsActiveWindow(xwindow_);
 601 }
 602
 603 void DesktopWindowTreeHostX11::Maximize() {
 604   if (HasWMSpecProperty("_NET_WM_STATE_FULLSCREEN")) {
 605     // Unfullscreen the window if it is fullscreen.
 606     SetWMSpecState(false,
 607                    atom_cache_.GetAtom("_NET_WM_STATE_FULLSCREEN"),
 608                    None);
 609
 610     // Resize the window so that it does not have the same size as a monitor.
 611     // (Otherwise, some window managers immediately put the window back in
 612     // fullscreen mode).
 613     gfx::Rect adjusted_bounds_in_pixels(bounds_in_pixels_.origin(),
 614                                         AdjustSize(bounds_in_pixels_.size()));
 615     if (adjusted_bounds_in_pixels != bounds_in_pixels_)
 616       SetBounds(adjusted_bounds_in_pixels);
 617   }
 618
 619   // Some WMs do not respect maximization hints on unmapped windows, so we
 620   // save this one for later too.
 621   should_maximize_after_map_ = !window_mapped_;
 622
 623   // When we are in the process of requesting to maximize a window, we can
 624   // accurately keep track of our restored bounds instead of relying on the
 625   // heuristics that are in the PropertyNotify and ConfigureNotify handlers.
 626   restored_bounds_in_pixels_ = bounds_in_pixels_;
 627
 628   SetWMSpecState(true,
 629                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_VERT"),
 630                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_HORZ"));
 631   if (IsMinimized())
 632     ShowWindowWithState(ui::SHOW_STATE_NORMAL);
 633 }
 634
 635 void DesktopWindowTreeHostX11::Minimize() {
 636   ReleaseCapture();
 637   XIconifyWindow(xdisplay_, xwindow_, 0);
 638 }
 639
 640 void DesktopWindowTreeHostX11::Restore() {
 641   should_maximize_after_map_ = false;
 642   SetWMSpecState(false,
 643                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_VERT"),
 644                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_HORZ"));
 645   if (IsMinimized())
 646     ShowWindowWithState(ui::SHOW_STATE_NORMAL);
 647 }
 648
 649 bool DesktopWindowTreeHostX11::IsMaximized() const {
 650   return (HasWMSpecProperty("_NET_WM_STATE_MAXIMIZED_VERT") &&
 651           HasWMSpecProperty("_NET_WM_STATE_MAXIMIZED_HORZ"));
 652 }
 653
 654 bool DesktopWindowTreeHostX11::IsMinimized() const {
 655   return HasWMSpecProperty("_NET_WM_STATE_HIDDEN");
 656 }
 657
 658 bool DesktopWindowTreeHostX11::HasCapture() const {
 659   return g_current_capture == this;
 660 }
 661
 662 void DesktopWindowTreeHostX11::SetAlwaysOnTop(bool always_on_top) {
 663   is_always_on_top_ = always_on_top;
 664   SetWMSpecState(always_on_top,
 665                  atom_cache_.GetAtom("_NET_WM_STATE_ABOVE"),
 666                  None);
 667 }
 668
 669 bool DesktopWindowTreeHostX11::IsAlwaysOnTop() const {
 670   return is_always_on_top_;
 671 }
 672
 673 void DesktopWindowTreeHostX11::SetVisibleOnAllWorkspaces(bool always_visible) {
 674   SetWMSpecState(always_visible,
 675                  atom_cache_.GetAtom("_NET_WM_STATE_STICKY"),
 676                  None);
 677
 678   int new_desktop = 0;
 679   if (always_visible) {
 680     new_desktop = kAllDesktops;
 681   } else {
 682     if (!ui::GetCurrentDesktop(&new_desktop))
 683       return;
 684   }
 685
 686   XEvent xevent;
 687   memset (&xevent, 0, sizeof (xevent));
 688   xevent.type = ClientMessage;
 689   xevent.xclient.window = xwindow_;
 690   xevent.xclient.message_type = atom_cache_.GetAtom("_NET_WM_DESKTOP");
 691   xevent.xclient.format = 32;
 692   xevent.xclient.data.l[0] = new_desktop;
 693   xevent.xclient.data.l[1] = 0;
 694   xevent.xclient.data.l[2] = 0;
 695   xevent.xclient.data.l[3] = 0;
 696   xevent.xclient.data.l[4] = 0;
 697   XSendEvent(xdisplay_, x_root_window_, False,
 698              SubstructureRedirectMask | SubstructureNotifyMask,
 699              &xevent);
 700 }
 701
 702 bool DesktopWindowTreeHostX11::SetWindowTitle(const base::string16& title) {
 703   if (window_title_ == title)
 704     return false;
 705   window_title_ = title;
 706   std::string utf8str = base::UTF16ToUTF8(title);
 707   XChangeProperty(xdisplay_,
 708                   xwindow_,
 709                   atom_cache_.GetAtom("_NET_WM_NAME"),
 710                   atom_cache_.GetAtom("UTF8_STRING"),
 711                   8,
 712                   PropModeReplace,
 713                   reinterpret_cast<const unsigned char*>(utf8str.c_str()),
 714                   utf8str.size());
 715   XTextProperty xtp;
 716   char *c_utf8_str = const_cast<char *>(utf8str.c_str());
 717   if (Xutf8TextListToTextProperty(xdisplay_, &c_utf8_str, 1,
 718                                   XUTF8StringStyle, &xtp) == Success) {
 719     XSetWMName(xdisplay_, xwindow_, &xtp);
 720     XFree(xtp.value);
 721   }
 722   return true;
 723 }
 724
 725 void DesktopWindowTreeHostX11::ClearNativeFocus() {
 726   // This method is weird and misnamed. Instead of clearing the native focus,
 727   // it sets the focus to our |content_window_|, which will trigger a cascade
 728   // of focus changes into views.
 729   if (content_window_ && aura::client::GetFocusClient(content_window_) &&
 730       content_window_->Contains(
 731           aura::client::GetFocusClient(content_window_)->GetFocusedWindow())) {
 732     aura::client::GetFocusClient(content_window_)->FocusWindow(content_window_);
 733   }
 734 }
 735
 736 Widget::MoveLoopResult DesktopWindowTreeHostX11::RunMoveLoop(
 737     const gfx::Vector2d& drag_offset,
 738     Widget::MoveLoopSource source,
 739     Widget::MoveLoopEscapeBehavior escape_behavior) {
 740   aura::client::WindowMoveSource window_move_source =
 741       source == Widget::MOVE_LOOP_SOURCE_MOUSE ?
 742       aura::client::WINDOW_MOVE_SOURCE_MOUSE :
 743       aura::client::WINDOW_MOVE_SOURCE_TOUCH;
 744   if (x11_window_move_client_->RunMoveLoop(content_window_, drag_offset,
 745       window_move_source) == aura::client::MOVE_SUCCESSFUL)
 746     return Widget::MOVE_LOOP_SUCCESSFUL;
 747
 748   return Widget::MOVE_LOOP_CANCELED;
 749 }
 750
 751 void DesktopWindowTreeHostX11::EndMoveLoop() {
 752   x11_window_move_client_->EndMoveLoop();
 753 }
 754
 755 void DesktopWindowTreeHostX11::SetVisibilityChangedAnimationsEnabled(
 756     bool value) {
 757   // Much like the previous NativeWidgetGtk, we don't have anything to do here.
 758 }
 759
 760 bool DesktopWindowTreeHostX11::ShouldUseNativeFrame() const {
 761   return use_native_frame_;
 762 }
 763
 764 bool DesktopWindowTreeHostX11::ShouldWindowContentsBeTransparent() const {
 765   return false;
 766 }
 767
 768 void DesktopWindowTreeHostX11::FrameTypeChanged() {
 769   Widget::FrameType new_type =
 770       native_widget_delegate_->AsWidget()->frame_type();
 771   if (new_type == Widget::FRAME_TYPE_DEFAULT) {
 772     // The default is determined by Widget::InitParams::remove_standard_frame
 773     // and does not change.
 774     return;
 775   }
 776
 777   SetUseNativeFrame(new_type == Widget::FRAME_TYPE_FORCE_NATIVE);
 778   // Replace the frame and layout the contents. Even though we don't have a
 779   // swapable glass frame like on Windows, we still replace the frame because
 780   // the button assets don't update otherwise.
 781   native_widget_delegate_->AsWidget()->non_client_view()->UpdateFrame();
 782 }
 783
 784 void DesktopWindowTreeHostX11::SetFullscreen(bool fullscreen) {
 785   if (is_fullscreen_ == fullscreen)
 786     return;
 787   is_fullscreen_ = fullscreen;
 788   if (is_fullscreen_)
 789     delayed_resize_task_.Cancel();
 790
 791   // Work around a bug where if we try to unfullscreen, metacity immediately
 792   // fullscreens us again. This is a little flickery and not necessary if
 793   // there's a gnome-panel, but it's not easy to detect whether there's a
 794   // panel or not.
 795   bool unmaximize_and_remaximize = !fullscreen && IsMaximized() &&
 796                                    ui::GuessWindowManager() == ui::WM_METACITY;
 797
 798   if (unmaximize_and_remaximize)
 799     Restore();
 800   SetWMSpecState(fullscreen,
 801                  atom_cache_.GetAtom("_NET_WM_STATE_FULLSCREEN"),
 802                  None);
 803   if (unmaximize_and_remaximize)
 804     Maximize();
 805
 806   // Try to guess the size we will have after the switch to/from fullscreen:
 807   // - (may) avoid transient states
 808   // - works around Flash content which expects to have the size updated
 809   //   synchronously.
 810   // See https://crbug.com/361408
 811   if (fullscreen) {
 812     restored_bounds_in_pixels_ = bounds_in_pixels_;
 813     const gfx::Display display =
 814         gfx::Screen::GetScreenFor(NULL)->GetDisplayNearestWindow(window());
 815     bounds_in_pixels_ = ToPixelRect(display.bounds());
 816   } else {
 817     bounds_in_pixels_ = restored_bounds_in_pixels_;
 818   }
 819   OnHostMoved(bounds_in_pixels_.origin());
 820   OnHostResized(bounds_in_pixels_.size());
 821
 822   if (HasWMSpecProperty("_NET_WM_STATE_FULLSCREEN") == fullscreen) {
 823     Relayout();
 824     ResetWindowRegion();
 825   }
 826   // Else: the widget will be relaid out either when the window bounds change or
 827   // when |xwindow_|'s fullscreen state changes.
 828 }
 829
 830 bool DesktopWindowTreeHostX11::IsFullscreen() const {
 831   return is_fullscreen_;
 832 }
 833
 834 void DesktopWindowTreeHostX11::SetOpacity(unsigned char opacity) {
 835   // X server opacity is in terms of 32 bit unsigned int space, and counts from
 836   // the opposite direction.
 837   // XChangeProperty() expects "cardinality" to be long.
 838   unsigned long cardinality = opacity * 0x1010101;
 839
 840   if (cardinality == 0xffffffff) {
 841     XDeleteProperty(xdisplay_, xwindow_,
 842                     atom_cache_.GetAtom("_NET_WM_WINDOW_OPACITY"));
 843   } else {
 844     XChangeProperty(xdisplay_, xwindow_,
 845                     atom_cache_.GetAtom("_NET_WM_WINDOW_OPACITY"),
 846                     XA_CARDINAL, 32,
 847                     PropModeReplace,
 848                     reinterpret_cast<unsigned char*>(&cardinality), 1);
 849   }
 850 }
 851
 852 void DesktopWindowTreeHostX11::SetWindowIcons(
 853     const gfx::ImageSkia& window_icon, const gfx::ImageSkia& app_icon) {
 854   // TODO(erg): The way we handle icons across different versions of chrome
 855   // could be substantially improved. The Windows version does its own thing
 856   // and only sometimes comes down this code path. The icon stuff in
 857   // ChromeViewsDelegate is hard coded to use HICONs. Likewise, we're hard
 858   // coded to be given two images instead of an arbitrary collection of images
 859   // so that we can pass to the WM.
 860   //
 861   // All of this could be made much, much better.
 862   std::vector<unsigned long> data;
 863
 864   if (window_icon.HasRepresentation(1.0f))
 865     SerializeImageRepresentation(window_icon.GetRepresentation(1.0f), &data);
 866
 867   if (app_icon.HasRepresentation(1.0f))
 868     SerializeImageRepresentation(app_icon.GetRepresentation(1.0f), &data);
 869
 870   if (!data.empty())
 871     ui::SetAtomArrayProperty(xwindow_, "_NET_WM_ICON", "CARDINAL", data);
 872 }
 873
 874 void DesktopWindowTreeHostX11::InitModalType(ui::ModalType modal_type) {
 875   switch (modal_type) {
 876     case ui::MODAL_TYPE_NONE:
 877       break;
 878     default:
 879       // TODO(erg): Figure out under what situations |modal_type| isn't
 880       // none. The comment in desktop_native_widget_aura.cc suggests that this
 881       // is rare.
 882       NOTIMPLEMENTED();
 883   }
 884 }
 885
 886 void DesktopWindowTreeHostX11::FlashFrame(bool flash_frame) {
 887   if (urgency_hint_set_ == flash_frame)
 888     return;
 889
 890   gfx::XScopedPtr<XWMHints> hints(XGetWMHints(xdisplay_, xwindow_));
 891   if (!hints) {
 892     // The window hasn't had its hints set yet.
 893     hints.reset(XAllocWMHints());
 894   }
 895
 896   if (flash_frame)
 897     hints->flags |= XUrgencyHint;
 898   else
 899     hints->flags &= ~XUrgencyHint;
 900
 901   XSetWMHints(xdisplay_, xwindow_, hints.get());
 902
 903   urgency_hint_set_ = flash_frame;
 904 }
 905
 906 void DesktopWindowTreeHostX11::OnRootViewLayout() {
 907   UpdateMinAndMaxSize();
 908 }
 909
 910 void DesktopWindowTreeHostX11::OnNativeWidgetFocus() {
 911 }
 912
 913 void DesktopWindowTreeHostX11::OnNativeWidgetBlur() {
 914 }
 915
 916 bool DesktopWindowTreeHostX11::IsAnimatingClosed() const {
 917   return false;
 918 }
 919
 920 bool DesktopWindowTreeHostX11::IsTranslucentWindowOpacitySupported() const {
 921   return false;
 922 }
 923
 924 void DesktopWindowTreeHostX11::SizeConstraintsChanged() {
 925   UpdateMinAndMaxSize();
 926 }
 927
 928 ////////////////////////////////////////////////////////////////////////////////
 929 // DesktopWindowTreeHostX11, aura::WindowTreeHost implementation:
 930
 931 gfx::Transform DesktopWindowTreeHostX11::GetRootTransform() const {
 932   gfx::Display display = gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
 933   if (window_mapped_) {
 934     aura::Window* win = const_cast<aura::Window*>(window());
 935     display = gfx::Screen::GetNativeScreen()->GetDisplayNearestWindow(win);
 936   }
 937
 938   float scale = display.device_scale_factor();
 939   gfx::Transform transform;
 940   transform.Scale(scale, scale);
 941   return transform;
 942 }
 943
 944 ui::EventSource* DesktopWindowTreeHostX11::GetEventSource() {
 945   return this;
 946 }
 947
 948 gfx::AcceleratedWidget DesktopWindowTreeHostX11::GetAcceleratedWidget() {
 949   return xwindow_;
 950 }
 951
 952 void DesktopWindowTreeHostX11::ShowImpl() {
 953   ShowWindowWithState(ui::SHOW_STATE_NORMAL);
 954   native_widget_delegate_->OnNativeWidgetVisibilityChanged(true);
 955 }
 956
 957 void DesktopWindowTreeHostX11::HideImpl() {
 958   if (window_mapped_) {
 959     XWithdrawWindow(xdisplay_, xwindow_, 0);
 960     window_mapped_ = false;
 961   }
 962   native_widget_delegate_->OnNativeWidgetVisibilityChanged(false);
 963 }
 964
 965 gfx::Rect DesktopWindowTreeHostX11::GetBounds() const {
 966   return bounds_in_pixels_;
 967 }
 968
 969 void DesktopWindowTreeHostX11::SetBounds(
 970     const gfx::Rect& requested_bounds_in_pixel) {
 971   gfx::Rect bounds_in_pixels(requested_bounds_in_pixel.origin(),
 972                              AdjustSize(requested_bounds_in_pixel.size()));
 973   bool origin_changed = bounds_in_pixels_.origin() != bounds_in_pixels.origin();
 974   bool size_changed = bounds_in_pixels_.size() != bounds_in_pixels.size();
 975   XWindowChanges changes = {0};
 976   unsigned value_mask = 0;
 977
 978   if (size_changed) {
 979     if (bounds_in_pixels.width() < min_size_in_pixels_.width() ||
 980         bounds_in_pixels.height() < min_size_in_pixels_.height() ||
 981         (!max_size_in_pixels_.IsEmpty() &&
 982          (bounds_in_pixels.width() > max_size_in_pixels_.width() ||
 983           bounds_in_pixels.height() > max_size_in_pixels_.height()))) {
 984       // Update the minimum and maximum sizes in case they have changed.
 985       UpdateMinAndMaxSize();
 986
 987       gfx::Size size_in_pixels = bounds_in_pixels.size();
 988       size_in_pixels.SetToMin(max_size_in_pixels_);
 989       size_in_pixels.SetToMax(min_size_in_pixels_);
 990       bounds_in_pixels.set_size(size_in_pixels);
 991     }
 992
 993     changes.width = bounds_in_pixels.width();
 994     changes.height = bounds_in_pixels.height();
 995     value_mask |= CWHeight | CWWidth;
 996   }
 997
 998   if (origin_changed) {
 999     changes.x = bounds_in_pixels.x();
1000     changes.y = bounds_in_pixels.y();
1001     value_mask |= CWX | CWY;
1002   }
1003   if (value_mask)
1004     XConfigureWindow(xdisplay_, xwindow_, value_mask, &changes);
1005
1006   // Assume that the resize will go through as requested, which should be the
1007   // case if we're running without a window manager.  If there's a window
1008   // manager, it can modify or ignore the request, but (per ICCCM) we'll get a
1009   // (possibly synthetic) ConfigureNotify about the actual size and correct
1010   // |bounds_in_pixels_| later.
1011   bounds_in_pixels_ = bounds_in_pixels;
1012
1013   if (origin_changed)
1014     native_widget_delegate_->AsWidget()->OnNativeWidgetMove();
1015   if (size_changed) {
1016     OnHostResized(bounds_in_pixels.size());
1017     ResetWindowRegion();
1018   }
1019 }
1020
1021 gfx::Point DesktopWindowTreeHostX11::GetLocationOnNativeScreen() const {
1022   return bounds_in_pixels_.origin();
1023 }
1024
1025 void DesktopWindowTreeHostX11::SetCapture() {
1026   if (HasCapture())
1027     return;
1028
1029   // Grabbing the mouse is asynchronous. However, we synchronously start
1030   // forwarding all mouse events received by Chrome to the
1031   // aura::WindowEventDispatcher which has capture. This makes capture
1032   // synchronous for all intents and purposes if either:
1033   // - |g_current_capture|'s X window has capture.
1034   // OR
1035   // - The topmost window underneath the mouse is managed by Chrome.
1036   DesktopWindowTreeHostX11* old_capturer = g_current_capture;
1037
1038   // Update |g_current_capture| prior to calling OnHostLostWindowCapture() to
1039   // avoid releasing pointer grab.
1040   g_current_capture = this;
1041   if (old_capturer)
1042     old_capturer->OnHostLostWindowCapture();
1043
1044   GrabPointer(xwindow_, true, None);
1045 }
1046
1047 void DesktopWindowTreeHostX11::ReleaseCapture() {
1048   if (g_current_capture == this) {
1049     // Release mouse grab asynchronously. A window managed by Chrome is likely
1050     // the topmost window underneath the mouse so the capture release being
1051     // asynchronous is likely inconsequential.
1052     g_current_capture = NULL;
1053     UngrabPointer();
1054
1055     OnHostLostWindowCapture();
1056   }
1057 }
1058
1059 void DesktopWindowTreeHostX11::SetCursorNative(gfx::NativeCursor cursor) {
1060   XDefineCursor(xdisplay_, xwindow_, cursor.platform());
1061 }
1062
1063 void DesktopWindowTreeHostX11::MoveCursorToNative(const gfx::Point& location) {
1064   XWarpPointer(xdisplay_, None, x_root_window_, 0, 0, 0, 0,
1065                bounds_in_pixels_.x() + location.x(),
1066                bounds_in_pixels_.y() + location.y());
1067 }
1068
1069 void DesktopWindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
1070   // TODO(erg): Conditional on us enabling touch on desktop linux builds, do
1071   // the same tap-to-click disabling here that chromeos does.
1072 }
1073
1074 ////////////////////////////////////////////////////////////////////////////////
1075 // DesktopWindowTreeHostX11, private:
1076
1077 void DesktopWindowTreeHostX11::InitX11Window(
1078     const Widget::InitParams& params) {
1079   unsigned long attribute_mask = CWBackPixmap;
1080   XSetWindowAttributes swa;
1081   memset(&swa, 0, sizeof(swa));
1082   swa.background_pixmap = None;
1083
1084   ::Atom window_type;
1085   switch (params.type) {
1086     case Widget::InitParams::TYPE_MENU:
1087       swa.override_redirect = True;
1088       window_type = atom_cache_.GetAtom("_NET_WM_WINDOW_TYPE_MENU");
1089       break;
1090     case Widget::InitParams::TYPE_TOOLTIP:
1091       swa.override_redirect = True;
1092       window_type = atom_cache_.GetAtom("_NET_WM_WINDOW_TYPE_TOOLTIP");
1093       break;
1094     case Widget::InitParams::TYPE_POPUP:
1095       swa.override_redirect = True;
1096       window_type = atom_cache_.GetAtom("_NET_WM_WINDOW_TYPE_NOTIFICATION");
1097       break;
1098     case Widget::InitParams::TYPE_DRAG:
1099       swa.override_redirect = True;
1100       window_type = atom_cache_.GetAtom("_NET_WM_WINDOW_TYPE_DND");
1101       break;
1102     default:
1103       window_type = atom_cache_.GetAtom("_NET_WM_WINDOW_TYPE_NORMAL");
1104       break;
1105   }
1106   if (swa.override_redirect)
1107     attribute_mask |= CWOverrideRedirect;
1108
1109   // Detect whether we're running inside a compositing manager. If so, try to
1110   // use the ARGB visual. Otherwise, just use our parent's visual.
1111   Visual* visual = CopyFromParent;
1112   int depth = CopyFromParent;
1113   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
1114           switches::kEnableTransparentVisuals) &&
1115       XGetSelectionOwner(xdisplay_, atom_cache_.GetAtom("_NET_WM_CM_S0")) !=
1116           None) {
1117     Visual* rgba_visual = GetARGBVisual();
1118     if (rgba_visual) {
1119       visual = rgba_visual;
1120       depth = 32;
1121
1122       attribute_mask |= CWColormap;
1123       swa.colormap = XCreateColormap(xdisplay_, x_root_window_, visual,
1124                                      AllocNone);
1125
1126       // x.org will BadMatch if we don't set a border when the depth isn't the
1127       // same as the parent depth.
1128       attribute_mask |= CWBorderPixel;
1129       swa.border_pixel = 0;
1130
1131       use_argb_visual_ = true;
1132     }
1133   }
1134
1135   bounds_in_pixels_ = ToPixelRect(params.bounds);
1136   bounds_in_pixels_.set_size(AdjustSize(bounds_in_pixels_.size()));
1137   xwindow_ = XCreateWindow(xdisplay_, x_root_window_, bounds_in_pixels_.x(),
1138                            bounds_in_pixels_.y(), bounds_in_pixels_.width(),
1139                            bounds_in_pixels_.height(),
1140                            0,  // border width
1141                            depth, InputOutput, visual, attribute_mask, &swa);
1142   if (ui::PlatformEventSource::GetInstance())
1143     ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
1144   open_windows().push_back(xwindow_);
1145
1146   // TODO(erg): Maybe need to set a ViewProp here like in RWHL::RWHL().
1147
1148   long event_mask = ButtonPressMask | ButtonReleaseMask | FocusChangeMask |
1149                     KeyPressMask | KeyReleaseMask |
1150                     EnterWindowMask | LeaveWindowMask |
1151                     ExposureMask | VisibilityChangeMask |
1152                     StructureNotifyMask | PropertyChangeMask |
1153                     PointerMotionMask;
1154   XSelectInput(xdisplay_, xwindow_, event_mask);
1155   XFlush(xdisplay_);
1156
1157   if (ui::IsXInput2Available())
1158     ui::TouchFactory::GetInstance()->SetupXI2ForXWindow(xwindow_);
1159
1160   // TODO(erg): We currently only request window deletion events. We also
1161   // should listen for activation events and anything else that GTK+ listens
1162   // for, and do something useful.
1163   ::Atom protocols[2];
1164   protocols[0] = atom_cache_.GetAtom("WM_DELETE_WINDOW");
1165   protocols[1] = atom_cache_.GetAtom("_NET_WM_PING");
1166   XSetWMProtocols(xdisplay_, xwindow_, protocols, 2);
1167
1168   // We need a WM_CLIENT_MACHINE and WM_LOCALE_NAME value so we integrate with
1169   // the desktop environment.
1170   XSetWMProperties(xdisplay_, xwindow_, NULL, NULL, NULL, 0, NULL, NULL, NULL);
1171
1172   // Likewise, the X server needs to know this window's pid so it knows which
1173   // program to kill if the window hangs.
1174   // XChangeProperty() expects "pid" to be long.
1175   static_assert(sizeof(long) >= sizeof(pid_t),
1176                 "pid_t should not be larger than long");
1177   long pid = getpid();
1178   XChangeProperty(xdisplay_,
1179                   xwindow_,
1180                   atom_cache_.GetAtom("_NET_WM_PID"),
1181                   XA_CARDINAL,
1182                   32,
1183                   PropModeReplace,
1184                   reinterpret_cast<unsigned char*>(&pid), 1);
1185
1186   XChangeProperty(xdisplay_,
1187                   xwindow_,
1188                   atom_cache_.GetAtom("_NET_WM_WINDOW_TYPE"),
1189                   XA_ATOM,
1190                   32,
1191                   PropModeReplace,
1192                   reinterpret_cast<unsigned char*>(&window_type), 1);
1193
1194   // List of window state properties (_NET_WM_STATE) to set, if any.
1195   std::vector< ::Atom> state_atom_list;
1196
1197   // Remove popup windows from taskbar unless overridden.
1198   if ((params.type == Widget::InitParams::TYPE_POPUP ||
1199        params.type == Widget::InitParams::TYPE_BUBBLE) &&
1200       !params.force_show_in_taskbar) {
1201     state_atom_list.push_back(
1202         atom_cache_.GetAtom("_NET_WM_STATE_SKIP_TASKBAR"));
1203   }
1204
1205   // If the window should stay on top of other windows, add the
1206   // _NET_WM_STATE_ABOVE property.
1207   is_always_on_top_ = params.keep_on_top;
1208   if (is_always_on_top_)
1209     state_atom_list.push_back(atom_cache_.GetAtom("_NET_WM_STATE_ABOVE"));
1210
1211   if (params.visible_on_all_workspaces) {
1212     state_atom_list.push_back(atom_cache_.GetAtom("_NET_WM_STATE_STICKY"));
1213     ui::SetIntProperty(xwindow_, "_NET_WM_DESKTOP", "CARDINAL", kAllDesktops);
1214   }
1215
1216   // Setting _NET_WM_STATE by sending a message to the root_window (with
1217   // SetWMSpecState) has no effect here since the window has not yet been
1218   // mapped. So we manually change the state.
1219   if (!state_atom_list.empty()) {
1220     ui::SetAtomArrayProperty(xwindow_,
1221                              "_NET_WM_STATE",
1222                              "ATOM",
1223                              state_atom_list);
1224   }
1225
1226   if (!params.wm_class_name.empty() || !params.wm_class_class.empty()) {
1227     ui::SetWindowClassHint(
1228         xdisplay_, xwindow_, params.wm_class_name, params.wm_class_class);
1229   }
1230
1231   const char* wm_role_name = NULL;
1232   // If the widget isn't overriding the role, provide a default value for popup
1233   // and bubble types.
1234   if (!params.wm_role_name.empty()) {
1235     wm_role_name = params.wm_role_name.c_str();
1236   } else {
1237     switch (params.type) {
1238       case Widget::InitParams::TYPE_POPUP:
1239         wm_role_name = kX11WindowRolePopup;
1240         break;
1241       case Widget::InitParams::TYPE_BUBBLE:
1242         wm_role_name = kX11WindowRoleBubble;
1243         break;
1244       default:
1245         break;
1246     }
1247   }
1248   if (wm_role_name)
1249     ui::SetWindowRole(xdisplay_, xwindow_, std::string(wm_role_name));
1250
1251   if (params.remove_standard_frame) {
1252     // Setting _GTK_HIDE_TITLEBAR_WHEN_MAXIMIZED tells gnome-shell to not force
1253     // fullscreen on the window when it matches the desktop size.
1254     ui::SetHideTitlebarWhenMaximizedProperty(xwindow_,
1255                                              ui::HIDE_TITLEBAR_WHEN_MAXIMIZED);
1256   }
1257
1258   // If we have a parent, record the parent/child relationship. We use this
1259   // data during destruction to make sure that when we try to close a parent
1260   // window, we also destroy all child windows.
1261   if (params.parent && params.parent->GetHost()) {
1262     XID parent_xid =
1263         params.parent->GetHost()->GetAcceleratedWidget();
1264     window_parent_ = GetHostForXID(parent_xid);
1265     DCHECK(window_parent_);
1266     window_parent_->window_children_.insert(this);
1267   }
1268
1269   // If we have a delegate which is providing a default window icon, use that
1270   // icon.
1271   gfx::ImageSkia* window_icon =
1272       ViewsDelegate::GetInstance()
1273           ? ViewsDelegate::GetInstance()->GetDefaultWindowIcon()
1274           : NULL;
1275   if (window_icon) {
1276     SetWindowIcons(gfx::ImageSkia(), *window_icon);
1277   }
1278   CreateCompositor();
1279   OnAcceleratedWidgetAvailable();
1280 }
1281
1282 gfx::Size DesktopWindowTreeHostX11::AdjustSize(
1283     const gfx::Size& requested_size_in_pixels) {
1284   std::vector<gfx::Display> displays =
1285       gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE)->GetAllDisplays();
1286   // Compare against all monitor sizes. The window manager can move the window
1287   // to whichever monitor it wants.
1288   for (size_t i = 0; i < displays.size(); ++i) {
1289     if (requested_size_in_pixels == displays[i].GetSizeInPixel()) {
1290       return gfx::Size(requested_size_in_pixels.width() - 1,
1291                        requested_size_in_pixels.height() - 1);
1292     }
1293   }
1294
1295   // Do not request a 0x0 window size. It causes an XError.
1296   gfx::Size size_in_pixels = requested_size_in_pixels;
1297   size_in_pixels.SetToMax(gfx::Size(1, 1));
1298   return size_in_pixels;
1299 }
1300
1301 void DesktopWindowTreeHostX11::OnWMStateUpdated() {
1302   std::vector< ::Atom> atom_list;
1303   // Ignore the return value of ui::GetAtomArrayProperty(). Fluxbox removes the
1304   // _NET_WM_STATE property when no _NET_WM_STATE atoms are set.
1305   ui::GetAtomArrayProperty(xwindow_, "_NET_WM_STATE", &atom_list);
1306
1307   bool was_minimized = IsMinimized();
1308
1309   window_properties_.clear();
1310   std::copy(atom_list.begin(), atom_list.end(),
1311             inserter(window_properties_, window_properties_.begin()));
1312
1313   // Propagate the window minimization information to the content window, so
1314   // the render side can update its visibility properly. OnWMStateUpdated() is
1315   // called by PropertyNofify event from DispatchEvent() when the browser is
1316   // minimized or shown from minimized state. On Windows, this is realized by
1317   // calling OnHostResized() with an empty size. In particular,
1318   // HWNDMessageHandler::GetClientAreaBounds() returns an empty size when the
1319   // window is minimized. On Linux, returning empty size in GetBounds() or
1320   // SetBounds() does not work.
1321   // We also propagate the minimization to the compositor, to makes sure that we
1322   // don't draw any 'blank' frames that could be noticed in applications such as
1323   // window manager previews, which show content even when a window is
1324   // minimized.
1325   bool is_minimized = IsMinimized();
1326   if (is_minimized != was_minimized) {
1327     if (is_minimized) {
1328       compositor()->SetVisible(false);
1329       content_window_->Hide();
1330     } else {
1331       content_window_->Show();
1332       compositor()->SetVisible(true);
1333     }
1334   }
1335
1336   if (restored_bounds_in_pixels_.IsEmpty()) {
1337     DCHECK(!IsFullscreen());
1338     if (IsMaximized()) {
1339       // The request that we become maximized originated from a different
1340       // process. |bounds_in_pixels_| already contains our maximized bounds. Do
1341       // a best effort attempt to get restored bounds by setting it to our
1342       // previously set bounds (and if we get this wrong, we aren't any worse
1343       // off since we'd otherwise be returning our maximized bounds).
1344       restored_bounds_in_pixels_ = previous_bounds_in_pixels_;
1345     }
1346   } else if (!IsMaximized() && !IsFullscreen()) {
1347     // If we have restored bounds, but WM_STATE no longer claims to be
1348     // maximized or fullscreen, we should clear our restored bounds.
1349     restored_bounds_in_pixels_ = gfx::Rect();
1350   }
1351
1352   // Ignore requests by the window manager to enter or exit fullscreen (e.g. as
1353   // a result of pressing a window manager accelerator key). Chrome does not
1354   // handle window manager initiated fullscreen. In particular, Chrome needs to
1355   // do preprocessing before the x window's fullscreen state is toggled.
1356
1357   is_always_on_top_ = HasWMSpecProperty("_NET_WM_STATE_ABOVE");
1358
1359   // Now that we have different window properties, we may need to relayout the
1360   // window. (The windows code doesn't need this because their window change is
1361   // synchronous.)
1362   Relayout();
1363   ResetWindowRegion();
1364 }
1365
1366 void DesktopWindowTreeHostX11::OnFrameExtentsUpdated() {
1367   std::vector<int> insets;
1368   if (ui::GetIntArrayProperty(xwindow_, "_NET_FRAME_EXTENTS", &insets) &&
1369       insets.size() == 4) {
1370     // |insets| are returned in the order: [left, right, top, bottom].
1371     native_window_frame_borders_in_pixels_ =
1372         gfx::Insets(insets[2], insets[0], insets[3], insets[1]);
1373   } else {
1374     native_window_frame_borders_in_pixels_ = gfx::Insets();
1375   }
1376 }
1377
1378 void DesktopWindowTreeHostX11::UpdateMinAndMaxSize() {
1379   if (!window_mapped_)
1380     return;
1381
1382   gfx::Size minimum_in_pixels =
1383       ToPixelRect(gfx::Rect(native_widget_delegate_->GetMinimumSize())).size();
1384   gfx::Size maximum_in_pixels =
1385       ToPixelRect(gfx::Rect(native_widget_delegate_->GetMaximumSize())).size();
1386   if (min_size_in_pixels_ == minimum_in_pixels &&
1387       max_size_in_pixels_ == maximum_in_pixels)
1388     return;
1389
1390   min_size_in_pixels_ = minimum_in_pixels;
1391   max_size_in_pixels_ = maximum_in_pixels;
1392
1393   XSizeHints hints;
1394   long supplied_return;
1395   XGetWMNormalHints(xdisplay_, xwindow_, &hints, &supplied_return);
1396
1397   if (minimum_in_pixels.IsEmpty()) {
1398     hints.flags &= ~PMinSize;
1399   } else {
1400     hints.flags |= PMinSize;
1401     hints.min_width = min_size_in_pixels_.width();
1402     hints.min_height = min_size_in_pixels_.height();
1403   }
1404
1405   if (maximum_in_pixels.IsEmpty()) {
1406     hints.flags &= ~PMaxSize;
1407   } else {
1408     hints.flags |= PMaxSize;
1409     hints.max_width = max_size_in_pixels_.width();
1410     hints.max_height = max_size_in_pixels_.height();
1411   }
1412
1413   XSetWMNormalHints(xdisplay_, xwindow_, &hints);
1414 }
1415
1416 void DesktopWindowTreeHostX11::UpdateWMUserTime(
1417     const ui::PlatformEvent& event) {
1418   if (!IsActive())
1419     return;
1420
1421   ui::EventType type = ui::EventTypeFromNative(event);
1422   if (type == ui::ET_MOUSE_PRESSED ||
1423       type == ui::ET_KEY_PRESSED ||
1424       type == ui::ET_TOUCH_PRESSED) {
1425     unsigned long wm_user_time_ms = static_cast<unsigned long>(
1426         ui::EventTimeFromNative(event).InMilliseconds());
1427     XChangeProperty(xdisplay_,
1428                     xwindow_,
1429                     atom_cache_.GetAtom("_NET_WM_USER_TIME"),
1430                     XA_CARDINAL,
1431                     32,
1432                     PropModeReplace,
1433                     reinterpret_cast<const unsigned char *>(&wm_user_time_ms),
1434                     1);
1435     X11DesktopHandler::get()->set_wm_user_time_ms(wm_user_time_ms);
1436   }
1437 }
1438
1439 void DesktopWindowTreeHostX11::SetWMSpecState(bool enabled,
1440                                               ::Atom state1,
1441                                               ::Atom state2) {
1442   XEvent xclient;
1443   memset(&xclient, 0, sizeof(xclient));
1444   xclient.type = ClientMessage;
1445   xclient.xclient.window = xwindow_;
1446   xclient.xclient.message_type = atom_cache_.GetAtom("_NET_WM_STATE");
1447   xclient.xclient.format = 32;
1448   xclient.xclient.data.l[0] =
1449       enabled ? k_NET_WM_STATE_ADD : k_NET_WM_STATE_REMOVE;
1450   xclient.xclient.data.l[1] = state1;
1451   xclient.xclient.data.l[2] = state2;
1452   xclient.xclient.data.l[3] = 1;
1453   xclient.xclient.data.l[4] = 0;
1454
1455   XSendEvent(xdisplay_, x_root_window_, False,
1456              SubstructureRedirectMask | SubstructureNotifyMask,
1457              &xclient);
1458 }
1459
1460 bool DesktopWindowTreeHostX11::HasWMSpecProperty(const char* property) const {
1461   return window_properties_.find(atom_cache_.GetAtom(property)) !=
1462       window_properties_.end();
1463 }
1464
1465 void DesktopWindowTreeHostX11::SetUseNativeFrame(bool use_native_frame) {
1466   use_native_frame_ = use_native_frame;
1467   ui::SetUseOSWindowFrame(xwindow_, use_native_frame);
1468   ResetWindowRegion();
1469 }
1470
1471 void DesktopWindowTreeHostX11::DispatchMouseEvent(ui::MouseEvent* event) {
1472   // In Windows, the native events sent to chrome are separated into client
1473   // and non-client versions of events, which we record on our LocatedEvent
1474   // structures. On X11, we emulate the concept of non-client. Before we pass
1475   // this event to the cross platform event handling framework, we need to
1476   // make sure it is appropriately marked as non-client if it's in the non
1477   // client area, or otherwise, we can get into a state where the a window is
1478   // set as the |mouse_pressed_handler_| in window_event_dispatcher.cc
1479   // despite the mouse button being released.
1480   //
1481   // We can't do this later in the dispatch process because we share that
1482   // with ash, and ash gets confused about event IS_NON_CLIENT-ness on
1483   // events, since ash doesn't expect this bit to be set, because it's never
1484   // been set before. (This works on ash on Windows because none of the mouse
1485   // events on the ash desktop are clicking in what Windows considers to be a
1486   // non client area.) Likewise, we won't want to do the following in any
1487   // WindowTreeHost that hosts ash.
1488   if (content_window_ && content_window_->delegate()) {
1489     int flags = event->flags();
1490     int hit_test_code =
1491         content_window_->delegate()->GetNonClientComponent(event->location());
1492     if (hit_test_code != HTCLIENT && hit_test_code != HTNOWHERE)
1493       flags |= ui::EF_IS_NON_CLIENT;
1494     event->set_flags(flags);
1495   }
1496
1497   // While we unset the urgency hint when we gain focus, we also must remove it
1498   // on mouse clicks because we can call FlashFrame() on an active window.
1499   if (event->IsAnyButton() || event->IsMouseWheelEvent())
1500     FlashFrame(false);
1501
1502   if (!g_current_capture || g_current_capture == this) {
1503     SendEventToProcessor(event);
1504   } else {
1505     // Another DesktopWindowTreeHostX11 has installed itself as
1506     // capture. Translate the event's location and dispatch to the other.
1507     ConvertEventToDifferentHost(event, g_current_capture);
1508     g_current_capture->SendEventToProcessor(event);
1509   }
1510 }
1511
1512 void DesktopWindowTreeHostX11::DispatchTouchEvent(ui::TouchEvent* event) {
1513   if (g_current_capture && g_current_capture != this &&
1514       event->type() == ui::ET_TOUCH_PRESSED) {
1515     ConvertEventToDifferentHost(event, g_current_capture);
1516     g_current_capture->SendEventToProcessor(event);
1517   } else {
1518     SendEventToProcessor(event);
1519   }
1520 }
1521
1522 void DesktopWindowTreeHostX11::DispatchKeyEvent(ui::KeyEvent* event) {
1523   GetInputMethod()->DispatchKeyEvent(event);
1524 }
1525
1526 void DesktopWindowTreeHostX11::ConvertEventToDifferentHost(
1527     ui::LocatedEvent* located_event,
1528     DesktopWindowTreeHostX11* host) {
1529   DCHECK_NE(this, host);
1530   const gfx::Display display_src =
1531       gfx::Screen::GetNativeScreen()->GetDisplayNearestWindow(window());
1532   const gfx::Display display_dest =
1533       gfx::Screen::GetNativeScreen()->GetDisplayNearestWindow(host->window());
1534   DCHECK_EQ(display_src.device_scale_factor(),
1535             display_dest.device_scale_factor());
1536   gfx::Vector2d offset = GetLocationOnNativeScreen() -
1537                          host->GetLocationOnNativeScreen();
1538   gfx::Point location_in_pixel_in_host = located_event->location() + offset;
1539   located_event->set_location(location_in_pixel_in_host);
1540 }
1541
1542 void DesktopWindowTreeHostX11::ResetWindowRegion() {
1543   // If a custom window shape was supplied then apply it.
1544   if (custom_window_shape_) {
1545     XShapeCombineRegion(xdisplay_, xwindow_, ShapeBounding, 0, 0,
1546                         window_shape_.get(), false);
1547     return;
1548   }
1549
1550   window_shape_.reset();
1551
1552   if (!IsMaximized() && !IsFullscreen()) {
1553     gfx::Path window_mask;
1554     views::Widget* widget = native_widget_delegate_->AsWidget();
1555     if (widget->non_client_view()) {
1556       // Some frame views define a custom (non-rectangular) window mask. If
1557       // so, use it to define the window shape. If not, fall through.
1558       widget->non_client_view()->GetWindowMask(bounds_in_pixels_.size(),
1559                                                &window_mask);
1560       if (window_mask.countPoints() > 0) {
1561         window_shape_.reset(gfx::CreateRegionFromSkPath(window_mask));
1562         XShapeCombineRegion(xdisplay_, xwindow_, ShapeBounding, 0, 0,
1563                             window_shape_.get(), false);
1564         return;
1565       }
1566     }
1567   }
1568
1569   // If we didn't set the shape for any reason, reset the shaping information.
1570   // How this is done depends on the border style, due to quirks and bugs in
1571   // various window managers.
1572   if (ShouldUseNativeFrame()) {
1573     // If the window has system borders, the mask must be set to null (not a
1574     // rectangle), because several window managers (eg, KDE, XFCE, XMonad) will
1575     // not put borders on a window with a custom shape.
1576     XShapeCombineMask(xdisplay_, xwindow_, ShapeBounding, 0, 0, None, ShapeSet);
1577   } else {
1578     // Conversely, if the window does not have system borders, the mask must be
1579     // manually set to a rectangle that covers the whole window (not null). This
1580     // is due to a bug in KWin <= 4.11.5 (KDE bug #330573) where setting a null
1581     // shape causes the hint to disable system borders to be ignored (resulting
1582     // in a double border).
1583     XRectangle r = {0,
1584                     0,
1585                     static_cast<unsigned short>(bounds_in_pixels_.width()),
1586                     static_cast<unsigned short>(bounds_in_pixels_.height())};
1587     XShapeCombineRectangles(
1588         xdisplay_, xwindow_, ShapeBounding, 0, 0, &r, 1, ShapeSet, YXBanded);
1589   }
1590 }
1591
1592 void DesktopWindowTreeHostX11::SerializeImageRepresentation(
1593     const gfx::ImageSkiaRep& rep,
1594     std::vector<unsigned long>* data) {
1595   int width = rep.GetWidth();
1596   data->push_back(width);
1597
1598   int height = rep.GetHeight();
1599   data->push_back(height);
1600
1601   const SkBitmap& bitmap = rep.sk_bitmap();
1602   SkAutoLockPixels locker(bitmap);
1603
1604   for (int y = 0; y < height; ++y)
1605     for (int x = 0; x < width; ++x)
1606       data->push_back(bitmap.getColor(x, y));
1607 }
1608
1609 Visual* DesktopWindowTreeHostX11::GetARGBVisual() {
1610   XVisualInfo visual_template;
1611   visual_template.screen = 0;
1612
1613   int visuals_len;
1614   gfx::XScopedPtr<XVisualInfo[]> visual_list(XGetVisualInfo(
1615       xdisplay_, VisualScreenMask, &visual_template, &visuals_len));
1616   for (int i = 0; i < visuals_len; ++i) {
1617     // Why support only 8888 ARGB? Because it's all that GTK+ supports. In
1618     // gdkvisual-x11.cc, they look for this specific visual and use it for all
1619     // their alpha channel using needs.
1620     //
1621     // TODO(erg): While the following does find a valid visual, some GL drivers
1622     // don't believe that this has an alpha channel. According to marcheu@,
1623     // this should work on open source driver though. (It doesn't work with
1624     // NVidia's binaries currently.) http://crbug.com/369209
1625     const XVisualInfo& info = visual_list[i];
1626     if (info.depth == 32 && info.visual->red_mask == 0xff0000 &&
1627         info.visual->green_mask == 0x00ff00 &&
1628         info.visual->blue_mask == 0x0000ff) {
1629       return info.visual;
1630     }
1631   }
1632
1633   return nullptr;
1634 }
1635
1636 std::list<XID>& DesktopWindowTreeHostX11::open_windows() {
1637   if (!open_windows_)
1638     open_windows_ = new std::list<XID>();
1639   return *open_windows_;
1640 }
1641
1642 void DesktopWindowTreeHostX11::MapWindow(ui::WindowShowState show_state) {
1643   if (show_state != ui::SHOW_STATE_DEFAULT &&
1644       show_state != ui::SHOW_STATE_NORMAL &&
1645       show_state != ui::SHOW_STATE_INACTIVE &&
1646       show_state != ui::SHOW_STATE_MAXIMIZED) {
1647     // It will behave like SHOW_STATE_NORMAL.
1648     NOTIMPLEMENTED();
1649   }
1650
1651   // Before we map the window, set size hints. Otherwise, some window managers
1652   // will ignore toplevel XMoveWindow commands.
1653   XSizeHints size_hints;
1654   size_hints.flags = PPosition;
1655   size_hints.x = bounds_in_pixels_.x();
1656   size_hints.y = bounds_in_pixels_.y();
1657   XSetWMNormalHints(xdisplay_, xwindow_, &size_hints);
1658
1659   // If SHOW_STATE_INACTIVE, tell the window manager not to focus the window
1660   // when mapping. This is done by setting the _NET_WM_USER_TIME to 0. See e.g.
1661   // http://standards.freedesktop.org/wm-spec/latest/ar01s05.html
1662   unsigned long wm_user_time_ms = (show_state == ui::SHOW_STATE_INACTIVE) ?
1663       0 : X11DesktopHandler::get()->wm_user_time_ms();
1664   if (show_state == ui::SHOW_STATE_INACTIVE || wm_user_time_ms != 0) {
1665     XChangeProperty(xdisplay_,
1666                     xwindow_,
1667                     atom_cache_.GetAtom("_NET_WM_USER_TIME"),
1668                     XA_CARDINAL,
1669                     32,
1670                     PropModeReplace,
1671                     reinterpret_cast<const unsigned char *>(&wm_user_time_ms),
1672                     1);
1673   }
1674
1675   XMapWindow(xdisplay_, xwindow_);
1676
1677   // We now block until our window is mapped. Some X11 APIs will crash and
1678   // burn if passed |xwindow_| before the window is mapped, and XMapWindow is
1679   // asynchronous.
1680   if (ui::X11EventSource::GetInstance())
1681     ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
1682   window_mapped_ = true;
1683
1684   UpdateMinAndMaxSize();
1685
1686   // Some WMs only respect maximize hints after the window has been mapped.
1687   // Check whether we need to re-do a maximization.
1688   if (should_maximize_after_map_) {
1689     Maximize();
1690     should_maximize_after_map_ = false;
1691   }
1692 }
1693
1694 void DesktopWindowTreeHostX11::SetWindowTransparency() {
1695   compositor()->SetHostHasTransparentBackground(use_argb_visual_);
1696   window()->SetTransparent(use_argb_visual_);
1697   content_window_->SetTransparent(use_argb_visual_);
1698 }
1699
1700 void DesktopWindowTreeHostX11::Relayout() {
1701   Widget* widget = native_widget_delegate_->AsWidget();
1702   NonClientView* non_client_view = widget->non_client_view();
1703   // non_client_view may be NULL, especially during creation.
1704   if (non_client_view) {
1705     non_client_view->client_view()->InvalidateLayout();
1706     non_client_view->InvalidateLayout();
1707   }
1708   widget->GetRootView()->Layout();
1709 }
1710
1711 ////////////////////////////////////////////////////////////////////////////////
1712 // DesktopWindowTreeHostX11, ui::PlatformEventDispatcher implementation:
1713
1714 bool DesktopWindowTreeHostX11::CanDispatchEvent(
1715     const ui::PlatformEvent& event) {
1716   return event->xany.window == xwindow_ ||
1717          (event->type == GenericEvent &&
1718           static_cast<XIDeviceEvent*>(event->xcookie.data)->event == xwindow_);
1719 }
1720
1721 uint32_t DesktopWindowTreeHostX11::DispatchEvent(
1722     const ui::PlatformEvent& event) {
1723   XEvent* xev = event;
1724
1725   TRACE_EVENT1("views", "DesktopWindowTreeHostX11::Dispatch",
1726                "event->type", event->type);
1727
1728   UpdateWMUserTime(event);
1729
1730   // May want to factor CheckXEventForConsistency(xev); into a common location
1731   // since it is called here.
1732   switch (xev->type) {
1733     case EnterNotify:
1734     case LeaveNotify: {
1735       // Ignore EventNotify and LeaveNotify events from children of |xwindow_|.
1736       // NativeViewGLSurfaceGLX adds a child to |xwindow_|.
1737       // TODO(pkotwicz|tdanderson): Figure out whether the suppression is
1738       // necessary. crbug.com/385716
1739       if (xev->xcrossing.detail == NotifyInferior)
1740         break;
1741
1742       ui::MouseEvent mouse_event(xev);
1743       DispatchMouseEvent(&mouse_event);
1744       break;
1745     }
1746     case Expose: {
1747       gfx::Rect damage_rect_in_pixels(xev->xexpose.x, xev->xexpose.y,
1748                                       xev->xexpose.width, xev->xexpose.height);
1749       compositor()->ScheduleRedrawRect(damage_rect_in_pixels);
1750       break;
1751     }
1752     case KeyPress: {
1753       ui::KeyEvent keydown_event(xev);
1754       DispatchKeyEvent(&keydown_event);
1755       break;
1756     }
1757     case KeyRelease: {
1758       // There is no way to deactivate a window in X11 so ignore input if
1759       // window is supposed to be 'inactive'. See comments in
1760       // X11DesktopHandler::DeactivateWindow() for more details.
1761       if (!IsActive() && !HasCapture())
1762         break;
1763
1764       ui::KeyEvent key_event(xev);
1765       DispatchKeyEvent(&key_event);
1766       break;
1767     }
1768     case ButtonPress:
1769     case ButtonRelease: {
1770       ui::EventType event_type = ui::EventTypeFromNative(xev);
1771       switch (event_type) {
1772         case ui::ET_MOUSEWHEEL: {
1773           ui::MouseWheelEvent mouseev(xev);
1774           DispatchMouseEvent(&mouseev);
1775           break;
1776         }
1777         case ui::ET_MOUSE_PRESSED:
1778         case ui::ET_MOUSE_RELEASED: {
1779           ui::MouseEvent mouseev(xev);
1780           DispatchMouseEvent(&mouseev);
1781           break;
1782         }
1783         case ui::ET_UNKNOWN:
1784           // No event is created for X11-release events for mouse-wheel buttons.
1785           break;
1786         default:
1787           NOTREACHED() << event_type;
1788       }
1789       break;
1790     }
1791     case FocusOut:
1792       if (xev->xfocus.mode != NotifyGrab) {
1793         ReleaseCapture();
1794         OnHostLostWindowCapture();
1795         X11DesktopHandler::get()->ProcessXEvent(xev);
1796       } else {
1797         dispatcher()->OnHostLostMouseGrab();
1798       }
1799       break;
1800     case FocusIn:
1801       X11DesktopHandler::get()->ProcessXEvent(xev);
1802       break;
1803     case ConfigureNotify: {
1804       DCHECK_EQ(xwindow_, xev->xconfigure.window);
1805       DCHECK_EQ(xwindow_, xev->xconfigure.event);
1806       // It's possible that the X window may be resized by some other means than
1807       // from within aura (e.g. the X window manager can change the size). Make
1808       // sure the root window size is maintained properly.
1809       int translated_x_in_pixels = xev->xconfigure.x;
1810       int translated_y_in_pixels = xev->xconfigure.y;
1811       if (!xev->xconfigure.send_event && !xev->xconfigure.override_redirect) {
1812         Window unused;
1813         XTranslateCoordinates(xdisplay_, xwindow_, x_root_window_, 0, 0,
1814                               &translated_x_in_pixels, &translated_y_in_pixels,
1815                               &unused);
1816       }
1817       gfx::Rect bounds_in_pixels(translated_x_in_pixels, translated_y_in_pixels,
1818                                  xev->xconfigure.width, xev->xconfigure.height);
1819       bool size_changed = bounds_in_pixels_.size() != bounds_in_pixels.size();
1820       bool origin_changed =
1821           bounds_in_pixels_.origin() != bounds_in_pixels.origin();
1822       previous_bounds_in_pixels_ = bounds_in_pixels_;
1823       bounds_in_pixels_ = bounds_in_pixels;
1824
1825       if (origin_changed)
1826         OnHostMoved(bounds_in_pixels_.origin());
1827
1828       if (size_changed) {
1829         delayed_resize_task_.Reset(base::Bind(
1830             &DesktopWindowTreeHostX11::DelayedResize,
1831             close_widget_factory_.GetWeakPtr(), bounds_in_pixels.size()));
1832         base::MessageLoop::current()->PostTask(
1833             FROM_HERE, delayed_resize_task_.callback());
1834       }
1835       break;
1836     }
1837     case GenericEvent: {
1838       ui::TouchFactory* factory = ui::TouchFactory::GetInstance();
1839       if (!factory->ShouldProcessXI2Event(xev))
1840         break;
1841
1842       ui::EventType type = ui::EventTypeFromNative(xev);
1843       XEvent last_event;
1844       int num_coalesced = 0;
1845
1846       switch (type) {
1847         case ui::ET_TOUCH_MOVED:
1848           num_coalesced = ui::CoalescePendingMotionEvents(xev, &last_event);
1849           if (num_coalesced > 0)
1850             xev = &last_event;
1851           // fallthrough
1852         case ui::ET_TOUCH_PRESSED:
1853         case ui::ET_TOUCH_RELEASED: {
1854           ui::TouchEvent touchev(xev);
1855           DispatchTouchEvent(&touchev);
1856           break;
1857         }
1858         case ui::ET_MOUSE_MOVED:
1859         case ui::ET_MOUSE_DRAGGED:
1860         case ui::ET_MOUSE_PRESSED:
1861         case ui::ET_MOUSE_RELEASED:
1862         case ui::ET_MOUSE_ENTERED:
1863         case ui::ET_MOUSE_EXITED: {
1864           if (type == ui::ET_MOUSE_MOVED || type == ui::ET_MOUSE_DRAGGED) {
1865             // If this is a motion event, we want to coalesce all pending motion
1866             // events that are at the top of the queue.
1867             num_coalesced = ui::CoalescePendingMotionEvents(xev, &last_event);
1868             if (num_coalesced > 0)
1869               xev = &last_event;
1870           }
1871           ui::MouseEvent mouseev(xev);
1872           DispatchMouseEvent(&mouseev);
1873           break;
1874         }
1875         case ui::ET_MOUSEWHEEL: {
1876           ui::MouseWheelEvent mouseev(xev);
1877           DispatchMouseEvent(&mouseev);
1878           break;
1879         }
1880         case ui::ET_SCROLL_FLING_START:
1881         case ui::ET_SCROLL_FLING_CANCEL:
1882         case ui::ET_SCROLL: {
1883           ui::ScrollEvent scrollev(xev);
1884           SendEventToProcessor(&scrollev);
1885           break;
1886         }
1887         case ui::ET_KEY_PRESSED:
1888         case ui::ET_KEY_RELEASED: {
1889           ui::KeyEvent key_event(xev);
1890           DispatchKeyEvent(&key_event);
1891           break;
1892         }
1893         case ui::ET_UNKNOWN:
1894           break;
1895         default:
1896           NOTREACHED();
1897       }
1898
1899       // If we coalesced an event we need to free its cookie.
1900       if (num_coalesced > 0)
1901         XFreeEventData(xev->xgeneric.display, &last_event.xcookie);
1902       break;
1903     }
1904     case MapNotify: {
1905       FOR_EACH_OBSERVER(DesktopWindowTreeHostObserverX11,
1906                         observer_list_,
1907                         OnWindowMapped(xwindow_));
1908       break;
1909     }
1910     case UnmapNotify: {
1911       FOR_EACH_OBSERVER(DesktopWindowTreeHostObserverX11,
1912                         observer_list_,
1913                         OnWindowUnmapped(xwindow_));
1914       break;
1915     }
1916     case ClientMessage: {
1917       Atom message_type = xev->xclient.message_type;
1918       if (message_type == atom_cache_.GetAtom("WM_PROTOCOLS")) {
1919         Atom protocol = static_cast<Atom>(xev->xclient.data.l[0]);
1920         if (protocol == atom_cache_.GetAtom("WM_DELETE_WINDOW")) {
1921           // We have received a close message from the window manager.
1922           OnHostCloseRequested();
1923         } else if (protocol == atom_cache_.GetAtom("_NET_WM_PING")) {
1924           XEvent reply_event = *xev;
1925           reply_event.xclient.window = x_root_window_;
1926
1927           XSendEvent(xdisplay_,
1928                      reply_event.xclient.window,
1929                      False,
1930                      SubstructureRedirectMask | SubstructureNotifyMask,
1931                      &reply_event);
1932         }
1933       } else if (message_type == atom_cache_.GetAtom("XdndEnter")) {
1934         drag_drop_client_->OnXdndEnter(xev->xclient);
1935       } else if (message_type == atom_cache_.GetAtom("XdndLeave")) {
1936         drag_drop_client_->OnXdndLeave(xev->xclient);
1937       } else if (message_type == atom_cache_.GetAtom("XdndPosition")) {
1938         drag_drop_client_->OnXdndPosition(xev->xclient);
1939       } else if (message_type == atom_cache_.GetAtom("XdndStatus")) {
1940         drag_drop_client_->OnXdndStatus(xev->xclient);
1941       } else if (message_type == atom_cache_.GetAtom("XdndFinished")) {
1942         drag_drop_client_->OnXdndFinished(xev->xclient);
1943       } else if (message_type == atom_cache_.GetAtom("XdndDrop")) {
1944         drag_drop_client_->OnXdndDrop(xev->xclient);
1945       }
1946       break;
1947     }
1948     case MappingNotify: {
1949       switch (xev->xmapping.request) {
1950         case MappingModifier:
1951         case MappingKeyboard:
1952           XRefreshKeyboardMapping(&xev->xmapping);
1953           break;
1954         case MappingPointer:
1955           ui::DeviceDataManagerX11::GetInstance()->UpdateButtonMap();
1956           break;
1957         default:
1958           NOTIMPLEMENTED() << " Unknown request: " << xev->xmapping.request;
1959           break;
1960       }
1961       break;
1962     }
1963     case MotionNotify: {
1964       // Discard all but the most recent motion event that targets the same
1965       // window with unchanged state.
1966       XEvent last_event;
1967       while (XPending(xev->xany.display)) {
1968         XEvent next_event;
1969         XPeekEvent(xev->xany.display, &next_event);
1970         if (next_event.type == MotionNotify &&
1971             next_event.xmotion.window == xev->xmotion.window &&
1972             next_event.xmotion.subwindow == xev->xmotion.subwindow &&
1973             next_event.xmotion.state == xev->xmotion.state) {
1974           XNextEvent(xev->xany.display, &last_event);
1975           xev = &last_event;
1976         } else {
1977           break;
1978         }
1979       }
1980
1981       ui::MouseEvent mouseev(xev);
1982       DispatchMouseEvent(&mouseev);
1983       break;
1984     }
1985     case PropertyNotify: {
1986       ::Atom changed_atom = xev->xproperty.atom;
1987       if (changed_atom == atom_cache_.GetAtom("_NET_WM_STATE"))
1988         OnWMStateUpdated();
1989       else if (changed_atom == atom_cache_.GetAtom("_NET_FRAME_EXTENTS"))
1990         OnFrameExtentsUpdated();
1991       break;
1992     }
1993     case SelectionNotify: {
1994       drag_drop_client_->OnSelectionNotify(xev->xselection);
1995       break;
1996     }
1997   }
1998   return ui::POST_DISPATCH_STOP_PROPAGATION;
1999 }
2000
2001 void DesktopWindowTreeHostX11::DelayedResize(const gfx::Size& size_in_pixels) {
2002   OnHostResized(size_in_pixels);
2003   ResetWindowRegion();
2004   delayed_resize_task_.Cancel();
2005 }
2006
2007 gfx::Rect DesktopWindowTreeHostX11::GetWorkAreaBoundsInPixels() const {
2008   std::vector<int> value;
2009   if (ui::GetIntArrayProperty(x_root_window_, "_NET_WORKAREA", &value) &&
2010       value.size() >= 4) {
2011     return gfx::Rect(value[0], value[1], value[2], value[3]);
2012   }
2013
2014   // Fetch the geometry of the root window.
2015   Window root;
2016   int x, y;
2017   unsigned int width, height;
2018   unsigned int border_width, depth;
2019   if (!XGetGeometry(xdisplay_, x_root_window_, &root, &x, &y, &width, &height,
2020                     &border_width, &depth)) {
2021     NOTIMPLEMENTED();
2022     return gfx::Rect(0, 0, 10, 10);
2023   }
2024
2025   return gfx::Rect(x, y, width, height);
2026 }
2027
2028 gfx::Rect DesktopWindowTreeHostX11::ToDIPRect(
2029     const gfx::Rect& rect_in_pixels) const {
2030   gfx::RectF rect_in_dip = gfx::RectF(rect_in_pixels);
2031   GetRootTransform().TransformRectReverse(&rect_in_dip);
2032   return gfx::ToEnclosingRect(rect_in_dip);
2033 }
2034
2035 gfx::Rect DesktopWindowTreeHostX11::ToPixelRect(
2036     const gfx::Rect& rect_in_dip) const {
2037   gfx::RectF rect_in_pixels = gfx::RectF(rect_in_dip);
2038   GetRootTransform().TransformRect(&rect_in_pixels);
2039   return gfx::ToEnclosingRect(rect_in_pixels);
2040 }
2041
2042 ////////////////////////////////////////////////////////////////////////////////
2043 // DesktopWindowTreeHost, public:
2044
2045 // static
2046 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
2047     internal::NativeWidgetDelegate* native_widget_delegate,
2048     DesktopNativeWidgetAura* desktop_native_widget_aura) {
2049   return new DesktopWindowTreeHostX11(native_widget_delegate,
2050                                       desktop_native_widget_aura);
2051 }
2052
2053 // static
2054 ui::NativeTheme* DesktopWindowTreeHost::GetNativeTheme(aura::Window* window) {
2055   const views::LinuxUI* linux_ui = views::LinuxUI::instance();
2056   if (linux_ui) {
2057     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
2058     if (native_theme)
2059       return native_theme;
2060   }
2061
2062   return ui::NativeTheme::instance();
2063 }
2064
2065 }  // namespace views