/* * Copyright (C) 2015 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. AND ITS CONTRIBUTORS ``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 ITS 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 "RenderElement.h" #include "RenderFragmentedFlow.h" #include "RenderText.h" #include "RenderView.h" namespace WebCore { class RenderTreePosition { public: explicit RenderTreePosition(RenderElement& parent) : m_parent(parent) { } RenderElement& parent() const { return m_parent; } void insert(RenderPtr<RenderObject>); bool canInsert(RenderElement&) const; bool canInsert(RenderText&) const; void computeNextSibling(const Node&); void moveToLastChild(); void invalidateNextSibling() { m_hasValidNextSibling = false; } void invalidateNextSibling(const RenderObject&); RenderObject* nextSiblingRenderer(const Node&) const; private: RenderElement& m_parent; WeakPtr<RenderObject> m_nextSibling { nullptr }; bool m_hasValidNextSibling { false }; #if !ASSERT_DISABLED unsigned m_assertionLimitCounter { 0 }; #endif }; inline void RenderTreePosition::moveToLastChild() { m_nextSibling = nullptr; m_hasValidNextSibling = true; } inline bool RenderTreePosition::canInsert(RenderElement& renderer) const { ASSERT(!renderer.parent()); return m_parent.isChildAllowed(renderer, renderer.style()); } inline bool RenderTreePosition::canInsert(RenderText& renderer) const { ASSERT(!renderer.parent()); return m_parent.isChildAllowed(renderer, m_parent.style()); } } // namespace WebCore