dom/base/WindowOrientationObserver.cpp
author Simon Whitehead <chemnova@gmail.com>
Sat, 13 May 2017 15:12:15 -0500
changeset 358329 633151f5d481d49bd39900d43e6a75d77459a7bb
parent 282388 e22b3043887ed36bf2c634c2924a7c8d39d226b1
child 390971 ff6e961b87dc1163c5efe35da2e334c6723a14e1
permissions -rw-r--r--
servo: Merge #16829 - Disallow negative duration for animation and transition (from hiikezoe:disallow-negative-duration); r=emilio <!-- Please describe your changes on the following line: --> --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #15343 <!-- Either: --> - [X] There are tests for these changes written by @simon-whitehead . Thank you! <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: 4613c0382ab76263fb8202ccf52f4c0520e44809

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "WindowOrientationObserver.h"

#include "nsGlobalWindow.h"
#include "mozilla/Hal.h"

using namespace mozilla::dom;

/**
 * This class is used by nsGlobalWindow to implement window.orientation
 * and window.onorientationchange. This class is defined in its own file
 * because Hal.h pulls in windows.h and can't be included from
 * nsGlobalWindow.cpp
 */
WindowOrientationObserver::WindowOrientationObserver(
  nsGlobalWindow* aGlobalWindow)
  : mWindow(aGlobalWindow)
{
  MOZ_ASSERT(aGlobalWindow && aGlobalWindow->IsInnerWindow());
  hal::RegisterScreenConfigurationObserver(this);

  hal::ScreenConfiguration config;
  hal::GetCurrentScreenConfiguration(&config);
  mAngle = config.angle();
}

WindowOrientationObserver::~WindowOrientationObserver()
{
  hal::UnregisterScreenConfigurationObserver(this);
}

void
WindowOrientationObserver::Notify(
  const mozilla::hal::ScreenConfiguration& aConfiguration)
{
  uint16_t currentAngle = aConfiguration.angle();
  if (mAngle != currentAngle && mWindow->AsInner()->IsCurrentInnerWindow()) {
    mAngle = currentAngle;
    mWindow->GetOuterWindow()->DispatchCustomEvent(NS_LITERAL_STRING("orientationchange"));
  }
}

/* static */ int16_t
WindowOrientationObserver::OrientationAngle()
{
  hal::ScreenConfiguration config;
  hal::GetCurrentScreenConfiguration(&config);
  int16_t angle = static_cast<int16_t>(config.angle());
  // config.angle() returns 0, 90, 180 or 270.
  // window.orientation returns -90, 0, 90 or 180.
  return angle <= 180 ? angle : angle - 360;
}