text: // 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/wm/core/default_screen_position_client.h"
  
  #include "ui/aura/window_tree_host.h"
  #include "ui/gfx/display.h"
  #include "ui/gfx/geometry/point_conversions.h"
  #include "ui/gfx/screen.h"
  
  namespace wm {
  
  DefaultScreenPositionClient::DefaultScreenPositionClient() {
  }
  
  DefaultScreenPositionClient::~DefaultScreenPositionClient() {
  }
  
  gfx::Point DefaultScreenPositionClient::GetOriginInScreen(
      const aura::Window* root_window) {
    gfx::Point origin_in_pixels = root_window->GetHost()->GetBounds().origin();
    aura::Window* window = const_cast<aura::Window*>(root_window);
    float scale = gfx::Screen::GetScreenFor(window)->
         GetDisplayNearestWindow(window).device_scale_factor();
    return gfx::ScaleToFlooredPoint(origin_in_pixels, 1.0f / scale);
  }
  
  void DefaultScreenPositionClient::ConvertPointToScreen(
      const aura::Window* window,
      gfx::Point* point) {
    const aura::Window* root_window = window->GetRootWindow();
    aura::Window::ConvertPointToTarget(window, root_window, point);
    gfx::Point origin = GetOriginInScreen(root_window);
    point->Offset(origin.x(), origin.y());
  }
  
  void DefaultScreenPositionClient::ConvertPointFromScreen(
      const aura::Window* window,
      gfx::Point* point) {
    const aura::Window* root_window = window->GetRootWindow();
    gfx::Point origin = GetOriginInScreen(root_window);
    point->Offset(-origin.x(), -origin.y());
    aura::Window::ConvertPointToTarget(root_window, window, point);
  }
  
  void DefaultScreenPositionClient::ConvertHostPointToScreen(aura::Window* window,
                                                             gfx::Point* point) {
    aura::Window* root_window = window->GetRootWindow();
    ConvertPointToScreen(root_window, point);
  }
  
  void DefaultScreenPositionClient::SetBounds(aura::Window* window,
                                              const gfx::Rect& bounds,
                                              const gfx::Display& display) {
    window->SetBounds(bounds);
  }
  
  }  // namespace wm
  