99 lines
3.7 KiB
C++
99 lines
3.7 KiB
C++
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "CSSValueKeywords.h"
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namespace WebCore {
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struct CSSValueKey {
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unsigned hash() const;
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template<class Encoder> void encode(Encoder&) const;
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template<class Decoder> static std::optional<CSSValueKey> decode(Decoder&);
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unsigned cssValueID;
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bool useDarkAppearance;
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bool useElevatedUserInterfaceLevel;
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};
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inline bool operator==(const CSSValueKey& a, const CSSValueKey& b)
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{
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return a.cssValueID == b.cssValueID && a.useDarkAppearance == b.useDarkAppearance && a.useElevatedUserInterfaceLevel == b.useElevatedUserInterfaceLevel;
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}
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template<class Encoder>
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void CSSValueKey::encode(Encoder& encoder) const
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{
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encoder << cssValueID;
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encoder << useDarkAppearance;
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encoder << useElevatedUserInterfaceLevel;
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}
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template<class Decoder>
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std::optional<CSSValueKey> CSSValueKey::decode(Decoder& decoder)
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{
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std::optional<unsigned> cssValueID;
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decoder >> cssValueID;
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if (!cssValueID)
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return std::nullopt;
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std::optional<bool> useDarkAppearance;
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decoder >> useDarkAppearance;
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if (!useDarkAppearance)
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return std::nullopt;
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std::optional<bool> useElevatedUserInterfaceLevel;
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decoder >> useElevatedUserInterfaceLevel;
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if (!useElevatedUserInterfaceLevel)
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return std::nullopt;
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return { { WTFMove(*cssValueID), WTFMove(*useDarkAppearance), WTFMove(*useElevatedUserInterfaceLevel) } };
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}
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inline unsigned CSSValueKey::hash() const
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{
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return cssValueID;
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}
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} // namespace WebCore
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namespace WTF {
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struct CSSValueKeyHash {
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static unsigned hash(const WebCore::CSSValueKey& key) { return key.hash(); }
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static bool equal(const WebCore::CSSValueKey& a, const WebCore::CSSValueKey& b) { return a == b; }
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static const bool safeToCompareToEmptyOrDeleted = true;
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};
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template<> struct HashTraits<WebCore::CSSValueKey> : GenericHashTraits<WebCore::CSSValueKey> {
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static WebCore::CSSValueKey emptyValue() { return WebCore::CSSValueKey { WebCore::CSSValueInvalid, false, false}; }
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static void constructDeletedValue(WebCore::CSSValueKey& slot) { new (NotNull, &slot) WebCore::CSSValueKey { WebCore::CSSValueInvalid, true, true}; }
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static bool isDeletedValue(const WebCore::CSSValueKey& slot) { return slot.cssValueID == WebCore::CSSValueInvalid && slot.useDarkAppearance && slot.useElevatedUserInterfaceLevel; }
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};
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template<> struct DefaultHash<WebCore::CSSValueKey> : CSSValueKeyHash { };
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} // namespace WTF
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