ScreenHelperUIKit.mm

Enable keyboard shortcuts

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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 "ScreenHelperUIKit.h"

#import <UIKit/UIScreen.h>

#include "mozilla/Logging.h"

#include "nsObjCExceptions.h"

using namespace mozilla;

static LazyLogModule sScreenLog("WidgetScreen");

namespace mozilla {

namespace widget {

ScreenHelperUIKit::ScreenHelperUIKit() {

  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;

  MOZ_LOG(sScreenLog, LogLevel::Debug, ("ScreenHelperUIKit created"));

  RefreshScreens();

  NS_OBJC_END_TRY_IGNORE_BLOCK;

static already_AddRefed<Screen> MakeScreen(UIScreen* aScreen) {

  NS_OBJC_BEGIN_TRY_BLOCK_RETURN;

  DesktopToLayoutDeviceScale contentsScaleFactor([aScreen scale]);

  CSSToLayoutDeviceScale defaultCssScaleFactor(contentsScaleFactor.scale);

  CGRect bounds = [[aScreen fixedCoordinateSpace] bounds];

  LayoutDeviceIntRect rect;

  rect.x = NSToIntRound(bounds.origin.x * contentsScaleFactor.scale);

  rect.y = NSToIntRound(bounds.origin.y * contentsScaleFactor.scale);

  rect.width = NSToIntRound((bounds.origin.x + bounds.size.width) *

                            contentsScaleFactor.scale) -

               rect.x;

  rect.height = NSToIntRound((bounds.size.height - bounds.origin.y) *

                             contentsScaleFactor.scale) -

                rect.y;

  // Modern iOS does support HDR, but it's not straightforward to get it given a

  // screen.

  uint32_t pixelDepth = 24;

  float dpi = 96.0f;

  MOZ_LOG(sScreenLog, LogLevel::Debug,

          ("New screen [%d %d %d %d (%d %d %d %d) %d %f %f %f]", rect.x, rect.y,

           rect.width, rect.height, rect.x, rect.y, rect.width, rect.height,

           pixelDepth, contentsScaleFactor.scale, defaultCssScaleFactor.scale,

           dpi));

  NSInteger fps = [aScreen maximumFramesPerSecond];

  RefPtr<Screen> screen =

      new Screen(rect, rect, pixelDepth, pixelDepth, fps, contentsScaleFactor,

                 defaultCssScaleFactor, dpi, Screen::IsPseudoDisplay::No,

                 Screen::IsHDR::No);

  return screen.forget();

  NS_OBJC_END_TRY_BLOCK_RETURN(nullptr);

void ScreenHelperUIKit::RefreshScreens() {

  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;

  MOZ_LOG(sScreenLog, LogLevel::Debug, ("Refreshing screens"));

  AutoTArray<RefPtr<Screen>, 1> screens;

  screens.AppendElement(MakeScreen([UIScreen mainScreen]));

  ScreenManager::Refresh(std::move(screens));

  NS_OBJC_END_TRY_IGNORE_BLOCK;

}  // namespace widget

}  // namespace mozilla