[WIP][Ozone] Support external touchscreens

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/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/ozone/common/gpu/ozone_gpu_messages.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 {
 
 DriWindow::DriWindow(PlatformWindowDelegate* delegate,
                      const gfx::Rect& bounds,
                      DriGpuPlatformSupportHost* sender,
                      EventFactoryEvdev* event_factory,
-                     DriWindowManager* window_manager)
+                     DriWindowManager* window_manager,
+                     DisplayManager* display_manager)
     : delegate_(delegate),
       sender_(sender),
       event_factory_(event_factory),
       window_manager_(window_manager),
       bounds_(bounds),
-      widget_(window_manager->NextAcceleratedWidget()) {
+      widget_(window_manager->NextAcceleratedWidget()),
+      touch_converter_(this, display_manager) {
   window_manager_->AddWindow(widget_, this);
 }
 
 DriWindow::~DriWindow() {
   PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
   window_manager_->RemoveWindow(widget_);
 
   sender_->RemoveChannelObserver(this);
   if (!sender_->IsConnected())
     return;
 
   sender_->Send(new OzoneGpuMsg_DestroyWindowDelegate(widget_));
 }
 
 void DriWindow::Initialize() {
   sender_->AddChannelObserver(this);
   delegate_->OnAcceleratedWidgetAvailable(widget_);
   PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
 }
 
 void DriWindow::Show() {}
 
 void DriWindow::Hide() {}
 
 void DriWindow::Close() {}
 
 void DriWindow::SetBounds(const gfx::Rect& bounds) {
   bounds_ = bounds;
   delegate_->OnBoundsChanged(bounds);
+  touch_converter_.UpdateTransform();
 
   if (!sender_->IsConnected())
     return;
 
   if (window_manager_->cursor()->GetCursorWindow() == widget_)
     window_manager_->cursor()->HideCursor();
 
   sender_->Send(new OzoneGpuMsg_WindowBoundsChanged(widget_, bounds));
 
   if (window_manager_->cursor()->GetCursorWindow() == widget_)
@@ skipping 23 matching lines @@
 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 (event->IsMouseEvent() || event->IsScrollEvent())
     return window_manager_->cursor()->GetCursorWindow() == widget_;
 
+  if (event->IsTouchEvent())
+    return touch_converter_.CanHandleEvent(*static_cast<TouchEvent*>(event));
+
   return true;
 }
 
 uint32_t DriWindow::DispatchEvent(const PlatformEvent& native_event) {
+  DCHECK(native_event);
+  Event* event = static_cast<Event*>(native_event);
+  if (event->IsTouchEvent())
+    touch_converter_.RewriteTouchEvent(static_cast<TouchEvent*>(event));
+
   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_));
 }
 
 void DriWindow::OnChannelDestroyed() {
 }
 
 }  // namespace ui