Add PlatformWindow/Event related code for Ozone X11.

ui/platform_window/x11/x11_window.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/platform_window/x11/x11_window.h"
 
 #include <X11/extensions/XInput2.h>
-#include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
-#include "base/strings/utf_string_conversions.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
-#include "ui/events/platform/platform_event_dispatcher.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/events/platform/x11/x11_event_source.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/x/x11_atom_cache.h"
-#include "ui/gfx/x/x11_types.h"
+#include "ui/events/x/events_x_utils.h"
 #include "ui/platform_window/platform_window_delegate.h"
 
 namespace ui {
 
-namespace {
-
-const char* kAtomsToCache[] = {
-  "UTF8_STRING",
-  "WM_DELETE_WINDOW",
-  "_NET_WM_NAME",
-  "_NET_WM_PID",
-  "_NET_WM_PING",
-  NULL
-};
-
-XID FindXEventTarget(XEvent* xevent) {
-  XID target = xevent->xany.window;
-  if (xevent->type == GenericEvent)
-    target = static_cast<XIDeviceEvent*>(xevent->xcookie.data)->event;
-  return target;
-}
-
-bool g_override_redirect = false;
-
-}  // namespace
-
 X11Window::X11Window(PlatformWindowDelegate* delegate)
-    : delegate_(delegate),
-      xdisplay_(gfx::GetXDisplay()),
-      xwindow_(None),
-      xroot_window_(DefaultRootWindow(xdisplay_)),
-      atom_cache_(xdisplay_, kAtomsToCache),
-      window_mapped_(false) {
-  CHECK(delegate_);
-  TouchFactory::SetTouchDeviceListFromCommandLine();
+    : X11WindowBase(delegate) {
+  DCHECK(PlatformEventSource::GetInstance());
+  PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
 }
 
 X11Window::~X11Window() {
-  Destroy();
+  PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
 }
 
-void X11Window::Destroy() {
-  if (xwindow_ == None)
-    return;
-
-  // Stop processing events.
-  PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
-  XID xwindow = xwindow_;
-  XDisplay* xdisplay = xdisplay_;
-  xwindow_ = None;
-  delegate_->OnClosed();
-  // |this| might be deleted because of the above call.
-
-  XDestroyWindow(xdisplay, xwindow);
+void X11Window::SetCursor(PlatformCursor cursor) {
+  XDefineCursor(xdisplay(), xwindow(), cursor);
 }
 
 void X11Window::ProcessXInput2Event(XEvent* xev) {
   if (!TouchFactory::GetInstance()->ShouldProcessXI2Event(xev))
     return;
   EventType event_type = EventTypeFromNative(xev);
   switch (event_type) {
     case ET_KEY_PRESSED:
     case ET_KEY_RELEASED: {
       KeyEvent key_event(xev);
-      delegate_->DispatchEvent(&key_event);
+      delegate()->DispatchEvent(&key_event);
       break;
     }
     case ET_MOUSE_PRESSED:
     case ET_MOUSE_MOVED:
     case ET_MOUSE_DRAGGED:
     case ET_MOUSE_RELEASED: {
       MouseEvent mouse_event(xev);
-      delegate_->DispatchEvent(&mouse_event);
+      delegate()->DispatchEvent(&mouse_event);
       break;
     }
     case ET_MOUSEWHEEL: {
       MouseWheelEvent wheel_event(xev);
-      delegate_->DispatchEvent(&wheel_event);
+      delegate()->DispatchEvent(&wheel_event);
       break;
     }
     case ET_SCROLL_FLING_START:
     case ET_SCROLL_FLING_CANCEL:
     case ET_SCROLL: {
       ScrollEvent scroll_event(xev);
-      delegate_->DispatchEvent(&scroll_event);
+      delegate()->DispatchEvent(&scroll_event);
       break;
     }
     case ET_TOUCH_MOVED:
     case ET_TOUCH_PRESSED:
     case ET_TOUCH_CANCELLED:
     case ET_TOUCH_RELEASED: {
       TouchEvent touch_event(xev);
-      delegate_->DispatchEvent(&touch_event);
+      delegate()->DispatchEvent(&touch_event);
       break;
     }
     default:
       break;
   }
 }
 
-void X11Window::Show() {
-  if (window_mapped_)
-    return;
-
-  CHECK(PlatformEventSource::GetInstance());
-  PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
-
-  XSetWindowAttributes swa;
-  memset(&swa, 0, sizeof(swa));
-  swa.background_pixmap = None;
-  swa.bit_gravity = NorthWestGravity;
-  swa.override_redirect = g_override_redirect;
-  xwindow_ = XCreateWindow(xdisplay_,
-                           xroot_window_,
-                           requested_bounds_.x(),
-                           requested_bounds_.y(),
-                           requested_bounds_.width(),
-                           requested_bounds_.height(),
-                           0,               // border width
-                           CopyFromParent,  // depth
-                           InputOutput,
-                           CopyFromParent,  // visual
-                           CWBackPixmap | CWBitGravity | CWOverrideRedirect,
-                           &swa);
-
-  long event_mask = ButtonPressMask | ButtonReleaseMask | FocusChangeMask |
-                    KeyPressMask | KeyReleaseMask | EnterWindowMask |
-                    LeaveWindowMask | ExposureMask | VisibilityChangeMask |
-                    StructureNotifyMask | PropertyChangeMask |
-                    PointerMotionMask;
-  XSelectInput(xdisplay_, xwindow_, event_mask);
-
-  unsigned char mask[XIMaskLen(XI_LASTEVENT)];
-  memset(mask, 0, sizeof(mask));
-
-  XISetMask(mask, XI_TouchBegin);
-  XISetMask(mask, XI_TouchUpdate);
-  XISetMask(mask, XI_TouchEnd);
-  XISetMask(mask, XI_ButtonPress);
-  XISetMask(mask, XI_ButtonRelease);
-  XISetMask(mask, XI_Motion);
-  XISetMask(mask, XI_KeyPress);
-  XISetMask(mask, XI_KeyRelease);
-
-  XIEventMask evmask;
-  evmask.deviceid = XIAllDevices;
-  evmask.mask_len = sizeof(mask);
-  evmask.mask = mask;
-  XISelectEvents(xdisplay_, xwindow_, &evmask, 1);
-  XFlush(xdisplay_);
-
-  ::Atom protocols[2];
-  protocols[0] = atom_cache_.GetAtom("WM_DELETE_WINDOW");
-  protocols[1] = atom_cache_.GetAtom("_NET_WM_PING");
-  XSetWMProtocols(xdisplay_, xwindow_, protocols, 2);
-
-  // We need a WM_CLIENT_MACHINE and WM_LOCALE_NAME value so we integrate with
-  // the desktop environment.
-  XSetWMProperties(
-      xdisplay_, xwindow_, NULL, NULL, NULL, 0, NULL, NULL, NULL);
-
-  // Likewise, the X server needs to know this window's pid so it knows which
-  // program to kill if the window hangs.
-  // XChangeProperty() expects "pid" to be long.
-  static_assert(sizeof(long) >= sizeof(pid_t),
-                "pid_t should not be larger than long");
-  long pid = getpid();
-  XChangeProperty(xdisplay_,
-                  xwindow_,
-                  atom_cache_.GetAtom("_NET_WM_PID"),
-                  XA_CARDINAL,
-                  32,
-                  PropModeReplace,
-                  reinterpret_cast<unsigned char*>(&pid),
-                  1);
-  // Before we map the window, set size hints. Otherwise, some window managers
-  // will ignore toplevel XMoveWindow commands.
-  XSizeHints size_hints;
-  size_hints.flags = PPosition | PWinGravity;
-  size_hints.x = requested_bounds_.x();
-  size_hints.y = requested_bounds_.y();
-  // Set StaticGravity so that the window position is not affected by the
-  // frame width when running with window manager.
-  size_hints.win_gravity = StaticGravity;
-  XSetWMNormalHints(xdisplay_, xwindow_, &size_hints);
-
-  XMapWindow(xdisplay_, xwindow_);
-
-  // We now block until our window is mapped. Some X11 APIs will crash and
-  // burn if passed |xwindow_| before the window is mapped, and XMapWindow is
-  // asynchronous.
-  if (X11EventSource::GetInstance())
-    X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
-  window_mapped_ = true;
-
-  // TODO(sky): provide real scale factor.
-  delegate_->OnAcceleratedWidgetAvailable(xwindow_, 1.f);
-}
-
-void X11Window::Hide() {
-  if (!window_mapped_)
-    return;
-  XWithdrawWindow(xdisplay_, xwindow_, 0);
-  window_mapped_ = false;
-}
-
-void X11Window::Close() {
-  Destroy();
-}
-
-void X11Window::SetBounds(const gfx::Rect& bounds) {
-  requested_bounds_ = bounds;
-  if (!window_mapped_)
-    return;
-  XWindowChanges changes = {0};
-  unsigned value_mask = CWX | CWY | CWWidth | CWHeight;
-  changes.x = bounds.x();
-  changes.y = bounds.y();
-  changes.width = bounds.width();
-  changes.height = bounds.height();
-  XConfigureWindow(xdisplay_, xwindow_, value_mask, &changes);
-}
-
-gfx::Rect X11Window::GetBounds() {
-  return confirmed_bounds_;
-}
-
-void X11Window::SetTitle(const base::string16& title) {
-  if (window_title_ == title)
-    return;
-  window_title_ = title;
-  std::string utf8str = base::UTF16ToUTF8(title);
-  XChangeProperty(xdisplay_,
-                  xwindow_,
-                  atom_cache_.GetAtom("_NET_WM_NAME"),
-                  atom_cache_.GetAtom("UTF8_STRING"),
-                  8,
-                  PropModeReplace,
-                  reinterpret_cast<const unsigned char*>(utf8str.c_str()),
-                  utf8str.size());
-  XTextProperty xtp;
-  char *c_utf8_str = const_cast<char *>(utf8str.c_str());
-  if (Xutf8TextListToTextProperty(xdisplay_, &c_utf8_str, 1,
-                                  XUTF8StringStyle, &xtp) == Success) {
-    XSetWMName(xdisplay_, xwindow_, &xtp);
-    XFree(xtp.value);
-  }
-}
-
-void X11Window::SetCapture() {}
-
-void X11Window::ReleaseCapture() {}
-
-void X11Window::ToggleFullscreen() {}
-
-void X11Window::Maximize() {}
-
-void X11Window::Minimize() {}
-
-void X11Window::Restore() {}
-
-void X11Window::SetCursor(PlatformCursor cursor) {
-  XDefineCursor(xdisplay_, xwindow_, cursor);
-}
-
-void X11Window::MoveCursorTo(const gfx::Point& location) {}
-
-void X11Window::ConfineCursorToBounds(const gfx::Rect& bounds) {
-}
-
-PlatformImeController* X11Window::GetPlatformImeController() {
-  return nullptr;
-}
-
-bool X11Window::CanDispatchEvent(const PlatformEvent& event) {
-  return FindXEventTarget(event) == xwindow_;
+bool X11Window::CanDispatchEvent(const PlatformEvent& xev) {
+  return HasXWindow() && XWindowFromXEvent(*xev) == xwindow();

[sadrul, 2016/02/09 19:34:39]

Looks like HasXWindow() and XWindowFromXEvent() are both used together. Can this
be reduced to a single X11WindowBase::IsEventForXWindow(xev) instead? (the
implementation of XWindowFromXEvent can also move into x11_window_base.cc into
an anonymous namespace)

[kylechar, 2016/02/09 21:31:54]

Done.

 }
 
 uint32_t X11Window::DispatchEvent(const PlatformEvent& event) {
   XEvent* xev = event;
   switch (xev->type) {
     case EnterNotify: {
       // EnterNotify creates ET_MOUSE_MOVED. Mark as synthesized as this is
       // not real mouse move event.
       MouseEvent mouse_event(xev);
       CHECK_EQ(ET_MOUSE_MOVED, mouse_event.type());
       mouse_event.set_flags(mouse_event.flags() | EF_IS_SYNTHESIZED);
-      delegate_->DispatchEvent(&mouse_event);
+      delegate()->DispatchEvent(&mouse_event);
       break;
     }
     case LeaveNotify: {
       MouseEvent mouse_event(xev);
-      delegate_->DispatchEvent(&mouse_event);
-      break;
-    }
-
-    case Expose: {
-      gfx::Rect damage_rect(xev->xexpose.x,
-                            xev->xexpose.y,
-                            xev->xexpose.width,
-                            xev->xexpose.height);
-      delegate_->OnDamageRect(damage_rect);
+      delegate()->DispatchEvent(&mouse_event);
       break;
     }
 
     case KeyPress:
     case KeyRelease: {
       KeyEvent key_event(xev);
-      delegate_->DispatchEvent(&key_event);
+      delegate()->DispatchEvent(&key_event);
       break;
     }
 
     case ButtonPress:
     case ButtonRelease: {
       switch (EventTypeFromNative(xev)) {
         case ET_MOUSEWHEEL: {
           MouseWheelEvent mouseev(xev);
-          delegate_->DispatchEvent(&mouseev);
+          delegate()->DispatchEvent(&mouseev);
           break;
         }
         case ET_MOUSE_PRESSED:
         case ET_MOUSE_RELEASED: {
           MouseEvent mouseev(xev);
-          delegate_->DispatchEvent(&mouseev);
+          delegate()->DispatchEvent(&mouseev);
           break;
         }
         case ET_UNKNOWN:
           // No event is created for X11-release events for mouse-wheel
           // buttons.
           break;
         default:
           NOTREACHED();
       }
       break;
     }
 
+    case Expose:
     case FocusOut:
-      if (xev->xfocus.mode != NotifyGrab)
-        delegate_->OnLostCapture();
-      break;
-
-    case ConfigureNotify: {
-      DCHECK_EQ(xwindow_, xev->xconfigure.event);
-      DCHECK_EQ(xwindow_, xev->xconfigure.window);
-      gfx::Rect bounds(xev->xconfigure.x,
-                       xev->xconfigure.y,
-                       xev->xconfigure.width,
-                       xev->xconfigure.height);
-      if (confirmed_bounds_ != bounds) {
-        confirmed_bounds_ = bounds;
-        delegate_->OnBoundsChanged(confirmed_bounds_);
-      }
+    case ConfigureNotify:
+    case ClientMessage: {
+      ProcessXWindowEvent(xev);
       break;
     }
 
-    case ClientMessage: {
-      Atom message = static_cast<Atom>(xev->xclient.data.l[0]);
-      if (message == atom_cache_.GetAtom("WM_DELETE_WINDOW")) {
-        delegate_->OnCloseRequest();
-      } else if (message == atom_cache_.GetAtom("_NET_WM_PING")) {
-        XEvent reply_event = *xev;
-        reply_event.xclient.window = xroot_window_;
-
-        XSendEvent(xdisplay_,
-                   reply_event.xclient.window,
-                   False,
-                   SubstructureRedirectMask | SubstructureNotifyMask,
-                   &reply_event);
-        XFlush(xdisplay_);
-      }
-      break;
-    }
-
     case GenericEvent: {
       ProcessXInput2Event(xev);
       break;
     }
   }
   return POST_DISPATCH_STOP_PROPAGATION;
 }
 
-namespace test {
-
-void SetUseOverrideRedirectWindowByDefault(bool override_redirect) {
-  g_override_redirect = override_redirect;
-}
-
-}  // namespace test
 }  // namespace ui