/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "HeadlessScreenHelper.h"

#include "prenv.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/RefPtr.h"
#include "nsTArray.h"

namespace mozilla {
namespace widget {

/* static */
LayoutDeviceIntRect HeadlessScreenHelper::GetScreenRect() {
  char* ev = PR_GetEnv("MOZ_HEADLESS_WIDTH");
  int width = 1366;
  if (ev) {
    width = atoi(ev);
  }
  ev = PR_GetEnv("MOZ_HEADLESS_HEIGHT");
  int height = 768;
  if (ev) {
    height = atoi(ev);
  }
  return LayoutDeviceIntRect(0, 0, width, height);
}

HeadlessScreenHelper::HeadlessScreenHelper() {
  AutoTArray<RefPtr<Screen>, 1> screenList;
  LayoutDeviceIntRect rect = GetScreenRect();
  auto ret =
      MakeRefPtr<Screen>(rect, rect, 24, 24, 0, DesktopToLayoutDeviceScale(),
                         CSSToLayoutDeviceScale(), 96.0f,
                         Screen::IsPseudoDisplay::No, Screen::IsHDR::No);
  screenList.AppendElement(ret.forget());
  ScreenManager::Refresh(std::move(screenList));
}

}  // namespace widget
}  // namespace mozilla