/* -*- 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; }