/* * Copyright (C) 2019 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include <wtf/Noncopyable.h> #include <wtf/RetainPtr.h> #if PLATFORM(IOS_FAMILY) OBJC_CLASS UITraitCollection; namespace WebCore { // This class automatically saves and restores the current UITraitCollection for // functions which call out into UIKit and rely on the current UITraitCollection being set class LocalCurrentTraitCollection { WTF_MAKE_NONCOPYABLE(LocalCurrentTraitCollection); public: WEBCORE_EXPORT LocalCurrentTraitCollection(bool useDarkAppearance, bool useElevatedUserInterfaceLevel); WEBCORE_EXPORT LocalCurrentTraitCollection(UITraitCollection *); WEBCORE_EXPORT ~LocalCurrentTraitCollection(); bool usingDarkAppearance() const { #if HAVE(OS_DARK_MODE_SUPPORT) return m_usingDarkAppearance; #else return false; #endif } bool usingElevatedUserInterfaceLevel() const { #if HAVE(OS_DARK_MODE_SUPPORT) return m_usingElevatedUserInterfaceLevel; #else return false; #endif } private: #if HAVE(OS_DARK_MODE_SUPPORT) RetainPtr<UITraitCollection> m_savedTraitCollection; bool m_usingDarkAppearance { false }; bool m_usingElevatedUserInterfaceLevel { false }; #endif }; } #endif // PLATFORM(IOS_FAMILY)