// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/base/layout.h"

#include "ui/display/display.h"
#include "ui/display/screen.h"

namespace ui {

float GetScaleFactorForNativeView(gfx::NativeView view) {
  // A number of unit tests do not setup the screen.
  if (!display::Screen::Get()) {
    return 1.0f;
  }

  // GetPreferredScaleFactorForView may return null if |view| is not shown
  // on the screen and there is no primary display. In that case use scale
  // factor 1.0.
  return display::Screen::Get()->GetPreferredScaleFactorForView(view).value_or(
      1.0f);
}

}  // namespace ui