153 lines
6.0 KiB
C++
153 lines
6.0 KiB
C++
/*
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* Copyright (C) 2016 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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#include "config.h"
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#include "StyleRelations.h"
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#include "Element.h"
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#include "NodeRenderStyle.h"
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#include "RenderStyle.h"
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#include "StyleUpdate.h"
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namespace WebCore {
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namespace Style {
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std::unique_ptr<Relations> commitRelationsToRenderStyle(RenderStyle& style, const Element& element, const Relations& relations)
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{
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if (!relations.isEmpty())
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style.setUnique();
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std::unique_ptr<Relations> remainingRelations;
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auto appendStyleRelation = [&remainingRelations] (const Relation& relation) {
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if (!remainingRelations)
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remainingRelations = makeUnique<Relations>();
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remainingRelations->append(relation);
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};
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for (auto& relation : relations) {
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if (relation.element != &element) {
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appendStyleRelation(relation);
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continue;
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}
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switch (relation.type) {
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case Relation::AffectedByEmpty:
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style.setEmptyState(relation.value);
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appendStyleRelation(relation);
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break;
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case Relation::FirstChild:
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style.setFirstChildState();
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break;
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case Relation::LastChild:
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style.setLastChildState();
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break;
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case Relation::Unique:
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break;
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case Relation::AffectedByPreviousSibling:
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case Relation::DescendantsAffectedByPreviousSibling:
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case Relation::AffectsNextSibling:
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case Relation::ChildrenAffectedByForwardPositionalRules:
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case Relation::DescendantsAffectedByForwardPositionalRules:
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case Relation::ChildrenAffectedByBackwardPositionalRules:
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case Relation::DescendantsAffectedByBackwardPositionalRules:
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case Relation::ChildrenAffectedByFirstChildRules:
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case Relation::ChildrenAffectedByPropertyBasedBackwardPositionalRules:
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case Relation::ChildrenAffectedByLastChildRules:
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case Relation::NthChildIndex:
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appendStyleRelation(relation);
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break;
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}
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}
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return remainingRelations;
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}
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void commitRelations(std::unique_ptr<Relations> relations, Update& update)
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{
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if (!relations)
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return;
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for (auto& relation : *relations) {
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auto& element = const_cast<Element&>(*relation.element);
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switch (relation.type) {
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case Relation::AffectedByEmpty:
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element.setStyleAffectedByEmpty();
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break;
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case Relation::AffectedByPreviousSibling:
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element.setStyleIsAffectedByPreviousSibling();
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break;
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case Relation::DescendantsAffectedByPreviousSibling:
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element.setDescendantsAffectedByPreviousSibling();
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break;
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case Relation::AffectsNextSibling: {
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auto* sibling = &element;
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for (unsigned i = 0; i < relation.value && sibling; ++i, sibling = sibling->nextElementSibling())
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sibling->setAffectsNextSiblingElementStyle();
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break;
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}
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case Relation::ChildrenAffectedByForwardPositionalRules:
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element.setChildrenAffectedByForwardPositionalRules();
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break;
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case Relation::DescendantsAffectedByForwardPositionalRules:
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element.setDescendantsAffectedByForwardPositionalRules();
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break;
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case Relation::ChildrenAffectedByBackwardPositionalRules:
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element.setChildrenAffectedByBackwardPositionalRules();
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break;
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case Relation::DescendantsAffectedByBackwardPositionalRules:
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element.setDescendantsAffectedByBackwardPositionalRules();
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break;
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case Relation::ChildrenAffectedByFirstChildRules:
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element.setChildrenAffectedByFirstChildRules();
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break;
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case Relation::ChildrenAffectedByPropertyBasedBackwardPositionalRules:
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element.setChildrenAffectedByBackwardPositionalRules();
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element.setChildrenAffectedByPropertyBasedBackwardPositionalRules();
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break;
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case Relation::ChildrenAffectedByLastChildRules:
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element.setChildrenAffectedByLastChildRules();
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break;
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case Relation::FirstChild:
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if (auto* style = update.elementStyle(element))
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style->setFirstChildState();
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break;
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case Relation::LastChild:
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if (auto* style = update.elementStyle(element))
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style->setLastChildState();
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break;
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case Relation::NthChildIndex:
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if (auto* style = update.elementStyle(element))
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style->setUnique();
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element.setChildIndex(relation.value);
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break;
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case Relation::Unique:
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if (auto* style = update.elementStyle(element))
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style->setUnique();
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break;
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}
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}
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}
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}
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}
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