mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
6bcc09dbd0
Remove all code relating to shadow trees, insertion points, shadow boundaries, traversing composed trees, distribution, template documents, custom elements, registering elements, element registries, element factories, shadow roots, etc. Remove the following features from the IDLs and from the binding generators: CustomElementCallbacks, Reflect*, EventHandler. Remove the CSS custom pseudo-element concept, since we no longer have a UA style sheet worth talking about, no longer have shadow trees or custom elements, no longer use pseudo-elements, and generally therefore don't use this code at all.
138 lines
4.2 KiB
C++
138 lines
4.2 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
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* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (C) 2011 Google Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "sky/engine/core/dom/RenderTreeBuilder.h"
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#include "sky/engine/core/css/resolver/StyleResolver.h"
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#include "sky/engine/core/dom/Node.h"
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#include "sky/engine/core/dom/Text.h"
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#include "sky/engine/core/rendering/RenderObject.h"
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#include "sky/engine/core/rendering/RenderText.h"
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#include "sky/engine/core/rendering/RenderView.h"
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namespace blink {
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RenderObject* RenderTreeBuilder::nextRenderer() const
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{
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ASSERT(m_renderingParent);
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ASSERT(m_node);
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// Avoid an O(N^2) walk over the children when reattaching all children of a node.
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if (m_renderingParent->needsAttach())
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return 0;
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for (Node* sibling = m_node->nextSibling(); sibling; sibling = sibling->nextSibling()) {
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if (RenderObject* next = sibling->renderer())
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return next;
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}
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return nullptr;
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}
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RenderObject* RenderTreeBuilder::parentRenderer() const
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{
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ASSERT(m_renderingParent);
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return m_renderingParent->renderer();
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}
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bool RenderTreeBuilder::shouldCreateRenderer() const
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{
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if (!m_renderingParent)
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return false;
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RenderObject* parentRenderer = this->parentRenderer();
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if (!parentRenderer)
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return false;
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if (!parentRenderer->canHaveChildren())
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return false;
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return true;
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}
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RenderStyle& RenderTreeBuilder::style() const
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{
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if (!m_style)
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m_style = toElement(m_node)->styleForRenderer();
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return *m_style;
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}
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void RenderTreeBuilder::createRendererForElementIfNeeded()
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{
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ASSERT(!m_node->renderer());
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if (!shouldCreateRenderer())
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return;
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Element* element = toElement(m_node);
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RenderStyle& style = this->style();
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if (style.display() == NONE)
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return;
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RenderObject* newRenderer = element->createRenderer(&style);
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if (!newRenderer)
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return;
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RenderObject* parentRenderer = this->parentRenderer();
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if (!parentRenderer->isChildAllowed(newRenderer, &style)) {
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newRenderer->destroy();
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return;
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}
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RenderObject* nextRenderer = this->nextRenderer();
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element->setRenderer(newRenderer);
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newRenderer->setStyle(&style); // setStyle() can depend on renderer() already being set.
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// Note: Adding newRenderer instead of renderer(). renderer() may be a child of newRenderer.
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parentRenderer->addChild(newRenderer, nextRenderer);
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}
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void RenderTreeBuilder::createRendererForTextIfNeeded()
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{
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ASSERT(!m_node->renderer());
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if (!shouldCreateRenderer())
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return;
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Text* textNode = toText(m_node);
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RenderObject* parentRenderer = this->parentRenderer();
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m_style = parentRenderer->style();
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if (!textNode->textRendererIsNeeded(*m_style, *parentRenderer))
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return;
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RenderText* newRenderer = textNode->createTextRenderer(m_style.get());
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if (!parentRenderer->isChildAllowed(newRenderer, m_style.get())) {
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newRenderer->destroy();
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return;
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}
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RenderObject* nextRenderer = this->nextRenderer();
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textNode->setRenderer(newRenderer);
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newRenderer->setStyle(m_style.release());
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parentRenderer->addChild(newRenderer, nextRenderer);
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}
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}
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