aura: Unify WindowTreeHost for some platforms

ui/aura/window_tree_host_win.cc

-// Copyright (c) 2012 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/aura/window_tree_host_win.h"
-
-#include <windows.h>
-
-#include <algorithm>
-
-#include "base/message_loop/message_loop.h"
-#include "ui/aura/client/cursor_client.h"
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/base/cursor/cursor_loader_win.h"
-#include "ui/base/view_prop.h"
-#include "ui/compositor/compositor.h"
-#include "ui/events/event.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/geometry/insets.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gfx/screen.h"
-#include "ui/platform_window/win/win_window.h"
-
-using std::max;
-using std::min;
-
-namespace aura {
-
-// static
-WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
-  return new WindowTreeHostWin(bounds);
-}
-
-// static
-gfx::Size WindowTreeHost::GetNativeScreenSize() {
-  return gfx::Size(GetSystemMetrics(SM_CXSCREEN),
-                   GetSystemMetrics(SM_CYSCREEN));
-}
-
-WindowTreeHostWin::WindowTreeHostWin(const gfx::Rect& bounds)
-    : has_capture_(false),
-      widget_(gfx::kNullAcceleratedWidget),
-      window_(new ui::WinWindow(this, bounds)) {
-}
-
-WindowTreeHostWin::~WindowTreeHostWin() {
-  DestroyCompositor();
-  DestroyDispatcher();
-  window_.reset();
-}
-
-ui::EventSource* WindowTreeHostWin::GetEventSource() {
-  return this;
-}
-
-gfx::AcceleratedWidget WindowTreeHostWin::GetAcceleratedWidget() {
-  return widget_;
-}
-
-void WindowTreeHostWin::ShowImpl() {
-  window_->Show();
-}
-
-void WindowTreeHostWin::HideImpl() {
-  window_->Hide();
-}
-
-gfx::Rect WindowTreeHostWin::GetBounds() const {
-  return window_->GetBounds();
-}
-
-void WindowTreeHostWin::SetBounds(const gfx::Rect& bounds) {
-  window_->SetBounds(bounds);
-}
-
-gfx::Point WindowTreeHostWin::GetLocationOnNativeScreen() const {
-  return window_->GetBounds().origin();
-}
-
-void WindowTreeHostWin::SetCapture() {
-  if (!has_capture_) {
-    has_capture_ = true;
-    window_->SetCapture();
-  }
-}
-
-void WindowTreeHostWin::ReleaseCapture() {
-  if (has_capture_)
-    window_->ReleaseCapture();
-}
-
-void WindowTreeHostWin::SetCursorNative(gfx::NativeCursor native_cursor) {
-  // Custom web cursors are handled directly.
-  if (native_cursor == ui::kCursorCustom)
-    return;
-
-  ui::CursorLoaderWin cursor_loader;
-  cursor_loader.SetPlatformCursor(&native_cursor);
-  ::SetCursor(native_cursor.platform());
-}
-
-void WindowTreeHostWin::MoveCursorToNative(const gfx::Point& location) {
-  // Deliberately not implemented.
-}
-
-void WindowTreeHostWin::OnCursorVisibilityChangedNative(bool show) {
-  NOTIMPLEMENTED();
-}
-
-void WindowTreeHostWin::OnBoundsChanged(const gfx::Rect& new_bounds) {
-  gfx::Rect old_bounds = bounds_;
-  bounds_ = new_bounds;
-  if (bounds_.origin() != old_bounds.origin())
-    OnHostMoved(bounds_.origin());
-  if (bounds_.size() != old_bounds.size())
-    OnHostResized(bounds_.size());
-}
-
-void WindowTreeHostWin::OnDamageRect(const gfx::Rect& damage_rect) {
-  compositor()->ScheduleRedrawRect(damage_rect);
-}
-
-void WindowTreeHostWin::DispatchEvent(ui::Event* event) {
-  ui::EventDispatchDetails details = SendEventToProcessor(event);
-  if (details.dispatcher_destroyed)
-    event->SetHandled();
-}
-
-void WindowTreeHostWin::OnCloseRequest() {
-  // TODO: this obviously shouldn't be here.
-  base::MessageLoopForUI::current()->Quit();
-}
-
-void WindowTreeHostWin::OnClosed() {
-}
-
-void WindowTreeHostWin::OnWindowStateChanged(
-    ui::PlatformWindowState new_state) {
-}
-
-void WindowTreeHostWin::OnLostCapture() {
-  if (has_capture_) {
-    has_capture_ = false;
-    OnHostLostWindowCapture();
-  }
-}
-
-void WindowTreeHostWin::OnAcceleratedWidgetAvailable(
-    gfx::AcceleratedWidget widget,
-    float device_pixel_ratio) {
-  widget_ = widget;
-  CreateCompositor();
-  WindowTreeHost::OnAcceleratedWidgetAvailable();
-}
-
-void WindowTreeHostWin::OnActivationChanged(bool active) {
-  if (active)
-    OnHostActivated();
-}
-
-}  // namespace aura