102 lines
4.0 KiB
C++
102 lines
4.0 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. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "LayoutContainerBox.h"
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#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
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namespace WebCore {
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namespace Layout {
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class LayoutContainingBlockChainIterator {
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public:
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LayoutContainingBlockChainIterator() = default;
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LayoutContainingBlockChainIterator(const ContainerBox*);
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const ContainerBox& operator*() const { return *m_current; }
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const ContainerBox* operator->() const { return m_current; }
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LayoutContainingBlockChainIterator& operator++();
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bool operator==(const LayoutContainingBlockChainIterator& other) const { return m_current == other.m_current; }
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bool operator!=(const LayoutContainingBlockChainIterator& other) const { return !(*this == other); }
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private:
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const ContainerBox* m_current { nullptr };
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};
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class LayoutContainingBlockChainIteratorAdapter {
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public:
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LayoutContainingBlockChainIteratorAdapter(const ContainerBox&, const ContainerBox* stayWithin = nullptr);
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auto begin() { return LayoutContainingBlockChainIterator(&m_containingBlock); }
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auto end() { return LayoutContainingBlockChainIterator(m_stayWithin); }
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private:
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const ContainerBox& m_containingBlock;
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const ContainerBox* m_stayWithin { nullptr };
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};
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LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box&);
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LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box&, const ContainerBox& stayWithin);
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LayoutContainingBlockChainIteratorAdapter containingBlockChainWithinFormattingContext(const Box&);
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inline LayoutContainingBlockChainIterator::LayoutContainingBlockChainIterator(const ContainerBox* current)
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: m_current(current)
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{
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}
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inline LayoutContainingBlockChainIterator& LayoutContainingBlockChainIterator::operator++()
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{
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ASSERT(m_current);
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m_current = m_current->isInitialContainingBlock() ? nullptr : &m_current->containingBlock();
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return *this;
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}
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inline LayoutContainingBlockChainIteratorAdapter::LayoutContainingBlockChainIteratorAdapter(const ContainerBox& containingBlock, const ContainerBox* stayWithin)
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: m_containingBlock(containingBlock)
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, m_stayWithin(stayWithin)
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{
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}
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inline LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box& layoutBox)
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{
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return LayoutContainingBlockChainIteratorAdapter(layoutBox.containingBlock());
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}
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inline LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box& layoutBox, const ContainerBox& stayWithin)
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{
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ASSERT(layoutBox.isDescendantOf(stayWithin));
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return LayoutContainingBlockChainIteratorAdapter(layoutBox.containingBlock(), &stayWithin);
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}
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inline LayoutContainingBlockChainIteratorAdapter containingBlockChainWithinFormattingContext(const Box& layoutBox)
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{
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return containingBlockChain(layoutBox, layoutBox.formattingContextRoot());
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}
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}
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}
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#endif
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