Refactor Windows DPI Point, Rect, and Size for Multiple Monitor DPI Awareness

ui/gfx/win/screen_win_display.cc

Index: ui/gfx/win/screen_win_display.cc
diff --git a/ui/gfx/win/screen_win_display.cc b/ui/gfx/win/screen_win_display.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c4795eb26e381a992c9e01a741a70b176603db91
--- /dev/null
+++ b/ui/gfx/win/screen_win_display.cc
@@ -0,0 +1,58 @@
+// Copyright 2016 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/gfx/win/screen_win_display.h"
+
+#include "ui/gfx/geometry/insets.h"
+#include "ui/gfx/win/display_info.h"
+#include "ui/gfx/win/rect_util.h"
+
+namespace gfx {
+namespace win {
+
+ScreenWinDisplay::ScreenWinDisplay() = default;
+
+ScreenWinDisplay::ScreenWinDisplay(const DisplayInfo& display_info)
+    : display_(display_info.id()),
+      pixel_bounds_(display_info.screen_rect()) {
+  float scale_factor = display_info.device_scale_factor();
+  display_.set_device_scale_factor(scale_factor);
+  display_.set_work_area(
+      gfx::ScaleToEnclosedRect(display_info.screen_work_rect(),
+                               1.0f / scale_factor));
+  display_.set_bounds(gfx::ScaleToEnclosedRect(display_info.screen_rect(),
+                                               1.0f / scale_factor));
+}
+
+ScreenWinDisplay::ScreenWinDisplay(const ScreenWinDisplay& ref,
+                                   const DisplayInfo& display_info)
+    : display_(display_info.id()),
+      pixel_bounds_(display_info.screen_rect()) {
+  float scale_factor = display_info.device_scale_factor();
+  display_.set_device_scale_factor(scale_factor);
+  const gfx::Insets pixel_insets =
+      display_info.screen_rect().InsetsFrom(display_info.screen_work_rect());
+  const gfx::Insets scaled_insets = pixel_insets.Scale(1.0f / scale_factor,
+                                                       1.0f / scale_factor);
+  const gfx::Rect scaled_bounds =
+      gfx::win::ScaleAndPositionRect(ref.display_.bounds(),
+                                     ref.physical_bounds(),
+                                     display_info.screen_rect(),
+                                     scale_factor);
+  display_.set_bounds(scaled_bounds);
+  gfx::Rect scaled_work_area(scaled_bounds);
+  scaled_work_area.Inset(scaled_insets);
+  display_.set_work_area(scaled_work_area);
+}
+
+const Display& ScreenWinDisplay::display() const {
+  return display_;
+}
+
+const Rect& ScreenWinDisplay::physical_bounds() const {
+  return pixel_bounds_;
+}
+
+}  // namespace win
+}  // namespace gfx