47 lines
2.2 KiB
C++
47 lines
2.2 KiB
C++
/*
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* Copyright (C) 2021 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'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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namespace WebCore {
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namespace Style {
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// This is used to identify style scopes that can affect an element.
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// Scopes are in tree-of-trees order. Styles from earlier scopes win over later ones (modulo !important).
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enum class ScopeOrdinal : int {
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ContainingHost = -1, // ::part rules and author-exposed UA pseudo classes from the host tree scope.
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Element = 0, // Normal rules in the same tree where the element is.
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FirstSlot = 1, // ::slotted rules in the parent's shadow tree. Values greater than FirstSlot indicate subsequent slots in the chain.
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Shadow = std::numeric_limits<int>::max(), // :host rules in element's own shadow tree.
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};
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inline ScopeOrdinal& operator++(ScopeOrdinal& ordinal)
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{
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ASSERT(ordinal < ScopeOrdinal::Shadow);
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return ordinal = static_cast<ScopeOrdinal>(static_cast<int>(ordinal) + 1);
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}
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}
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}
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