ash: ozone: apply transformation to events outside the root window

ui/ozone/platform/dri/dri_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/ozone/platform/dri/dri_window.h"
 
 #include "base/bind.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/events/event.h"
 #include "ui/events/ozone/evdev/event_factory_evdev.h"
 #include "ui/events/ozone/events_ozone.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/display.h"
 #include "ui/ozone/common/gpu/ozone_gpu_messages.h"
 #include "ui/ozone/platform/dri/display_manager.h"
 #include "ui/ozone/platform/dri/dri_cursor.h"
 #include "ui/ozone/platform/dri/dri_gpu_platform_support_host.h"
 #include "ui/ozone/platform/dri/dri_window_manager.h"
 #include "ui/platform_window/platform_window_delegate.h"
 
 namespace ui {
 
 namespace {
 
-void RewriteTouchEvent(TouchEvent* event) {
+void RewriteTouchEvent(TouchEvent* event, const gfx::PointF& window_offset) {
   float x = event->location_f().x();
   float y = event->location_f().y();
   double radius_x = event->radius_x();
   double radius_y = event->radius_y();
 
   DeviceDataManager::GetInstance()->ApplyTouchTransformer(
       event->source_device_id(), &x, &y);
   DeviceDataManager::GetInstance()->ApplyTouchRadiusScale(
       event->source_device_id(), &radius_x);
   DeviceDataManager::GetInstance()->ApplyTouchRadiusScale(
       event->source_device_id(), &radius_y);
 
   event->set_location(gfx::PointF(x, y));
+  event->set_root_location(
+      gfx::PointF(x + window_offset.x(), y + window_offset.y()));
   event->set_radius_x(radius_x);
   event->set_radius_y(radius_y);
 }
 
 }  // namespace
 
 DriWindow::DriWindow(PlatformWindowDelegate* delegate,
                      const gfx::Rect& bounds,
                      DriGpuPlatformSupportHost* sender,
                      EventFactoryEvdev* event_factory,
@@ skipping 45 matching lines @@
   sender_->Send(new OzoneGpuMsg_WindowBoundsChanged(widget_, bounds));
 
   if (window_manager_->cursor()->GetCursorWindow() == widget_)
     window_manager_->cursor()->ShowCursor();
 }
 
 gfx::Rect DriWindow::GetBounds() {
   return bounds_;
 }
 
-void DriWindow::SetCapture() {}
+void DriWindow::SetCapture() {
+  window_manager_->GrabEvents(widget_);
+}
 
-void DriWindow::ReleaseCapture() {}
+void DriWindow::ReleaseCapture() {
+  window_manager_->UngrabEvents(widget_);
+}
 
 void DriWindow::ToggleFullscreen() {}
 
 void DriWindow::Maximize() {}
 
 void DriWindow::Minimize() {}
 
 void DriWindow::Restore() {}
 
 void DriWindow::SetCursor(PlatformCursor cursor) {
   DriCursor* dri_cursor = window_manager_->cursor();
   dri_cursor->SetCursor(widget_, cursor);
   // ShowCursor results in a IPC call to GPU. So, we make sure the channel
   // is connected. OnChannelEstablished guarantees that ShowCursor is called
   // eventually.
   if (sender_->IsConnected() && dri_cursor->GetCursorWindow() == widget_)
     dri_cursor->ShowCursor();
 }
 
 void DriWindow::MoveCursorTo(const gfx::Point& location) {
   event_factory_->WarpCursorTo(widget_, location);
 }
 
 bool DriWindow::CanDispatchEvent(const PlatformEvent& ne) {
   DCHECK(ne);
   Event* event = static_cast<Event*>(ne);
+
+  // If there is a grab, capture relevant events here.
+  gfx::AcceleratedWidget grabber = window_manager_->event_grabber();
+  if (grabber != gfx::kNullAcceleratedWidget)
+    return grabber == widget_;
+
+  // Otherwise, just consider the position of the cursor.
   if (event->IsMouseEvent() || event->IsScrollEvent())
     return window_manager_->cursor()->GetCursorWindow() == widget_;
 
   if (event->IsTouchEvent()) {
     int64_t display_id =
         DeviceDataManager::GetInstance()->GetDisplayForTouchDevice(
             event->source_device_id());
 
     if (display_id == gfx::Display::kInvalidDisplayID)
       return false;
@@ skipping 12 matching lines @@
   }
 
   return true;
 }
 
 uint32_t DriWindow::DispatchEvent(const PlatformEvent& native_event) {
   DCHECK(native_event);
 
   Event* event = static_cast<Event*>(native_event);
   if (event->IsTouchEvent())
-    RewriteTouchEvent(static_cast<TouchEvent*>(event));
-
+    RewriteTouchEvent(static_cast<TouchEvent*>(event), bounds_.origin());
+  if (event->IsLocatedEvent()) {

[sadrul, 2014/11/24 22:27:04]

Why do we rewrite the location of the touch-event twice? (once in
RewriteTouchEvent(), and again here)

+    // We need to convert the cursor's position into coordinates
+    // relative to the window in case of an implicit grab.
+    LocatedEvent* located_event = static_cast<LocatedEvent*>(event);
+    gfx::PointF location = located_event->root_location();
+    location.Offset(-bounds_.origin().x(), -bounds_.origin().y());

[sadrul, 2014/11/24 22:27:04]

Just bounds_.x(), bounds_.y();

+    located_event->set_location(location);
+  }
   DispatchEventFromNativeUiEvent(
       native_event, base::Bind(&PlatformWindowDelegate::DispatchEvent,
                                base::Unretained(delegate_)));
   return POST_DISPATCH_STOP_PROPAGATION;
 }
 
 void DriWindow::OnChannelEstablished() {
   sender_->Send(new OzoneGpuMsg_CreateWindowDelegate(widget_));
   sender_->Send(new OzoneGpuMsg_WindowBoundsChanged(widget_, bounds_));
 
   DriCursor* dri_cursor = window_manager_->cursor();
   if (dri_cursor->GetCursorWindow() == widget_)
     dri_cursor->ShowCursor();
 }
 
 void DriWindow::OnChannelDestroyed() {
 }
 
 }  // namespace ui