Restore aura support from Mojo repo.

mandoline/ui/aura/window_tree_host_mojo.cc

+// Copyright 2015 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 "mandoline/ui/aura/window_tree_host_mojo.h"
+
+#include "components/view_manager/public/cpp/view_manager.h"
+#include "mandoline/ui/aura/surface_context_factory.h"
+#include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/public/interfaces/application/shell.mojom.h"
+#include "ui/aura/env.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_event_dispatcher.h"
+#include "ui/events/event.h"
+#include "ui/events/event_constants.h"
+
+namespace mandoline {
+
+////////////////////////////////////////////////////////////////////////////////
+// WindowTreeHostMojo, public:
+
+WindowTreeHostMojo::WindowTreeHostMojo(mojo::Shell* shell, mojo::View* view)
+    : view_(view), bounds_(view->bounds().To<gfx::Rect>()) {
+  view_->AddObserver(this);
+
+  context_factory_.reset(new SurfaceContextFactory(shell, view_));
+  // WindowTreeHost creates the compositor using the ContextFactory from
+  // aura::Env. Install |context_factory_| there so that |context_factory_| is
+  // picked up.
+  ui::ContextFactory* default_context_factory =
+      aura::Env::GetInstance()->context_factory();
+  aura::Env::GetInstance()->set_context_factory(context_factory_.get());
+  CreateCompositor(GetAcceleratedWidget());
+  aura::Env::GetInstance()->set_context_factory(default_context_factory);
+  DCHECK_EQ(context_factory_.get(), compositor()->context_factory());
+}
+
+WindowTreeHostMojo::~WindowTreeHostMojo() {
+  view_->RemoveObserver(this);
+  DestroyCompositor();
+  DestroyDispatcher();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// WindowTreeHostMojo, aura::WindowTreeHost implementation:
+
+ui::EventSource* WindowTreeHostMojo::GetEventSource() {
+  return this;
+}
+
+gfx::AcceleratedWidget WindowTreeHostMojo::GetAcceleratedWidget() {
+  return gfx::kNullAcceleratedWidget;
+}
+
+void WindowTreeHostMojo::Show() {
+  window()->Show();
+}
+
+void WindowTreeHostMojo::Hide() {
+}
+
+gfx::Rect WindowTreeHostMojo::GetBounds() const {
+  return bounds_;
+}
+
+void WindowTreeHostMojo::SetBounds(const gfx::Rect& bounds) {
+  window()->SetBounds(gfx::Rect(bounds.size()));
+}
+
+gfx::Point WindowTreeHostMojo::GetLocationOnNativeScreen() const {
+  return gfx::Point(0, 0);
+}
+
+void WindowTreeHostMojo::SetCapture() {
+  NOTIMPLEMENTED();
+}
+
+void WindowTreeHostMojo::ReleaseCapture() {
+  NOTIMPLEMENTED();
+}
+
+void WindowTreeHostMojo::SetCursorNative(gfx::NativeCursor cursor) {
+  NOTIMPLEMENTED();
+}
+
+void WindowTreeHostMojo::MoveCursorToNative(const gfx::Point& location) {
+  NOTIMPLEMENTED();
+}
+
+void WindowTreeHostMojo::OnCursorVisibilityChangedNative(bool show) {
+  NOTIMPLEMENTED();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// WindowTreeHostMojo, ui::EventSource implementation:
+
+ui::EventProcessor* WindowTreeHostMojo::GetEventProcessor() {
+  return dispatcher();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// WindowTreeHostMojo, ViewObserver implementation:
+
+void WindowTreeHostMojo::OnViewBoundsChanged(
+    mojo::View* view,
+    const mojo::Rect& old_bounds,
+    const mojo::Rect& new_bounds) {
+  gfx::Rect old_bounds2 = old_bounds.To<gfx::Rect>();
+  gfx::Rect new_bounds2 = new_bounds.To<gfx::Rect>();
+  bounds_ = new_bounds2;
+  if (old_bounds2.origin() != new_bounds2.origin())
+    OnHostMoved(bounds_.origin());
+  if (old_bounds2.size() != new_bounds2.size())
+    OnHostResized(bounds_.size());
+}
+
+}  // namespace mandoline