| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2001 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "sky/engine/core/dom/RenderTreeBuilder.h" |
| |
| #include "sky/engine/core/css/resolver/StyleResolver.h" |
| #include "sky/engine/core/dom/Node.h" |
| #include "sky/engine/core/dom/Text.h" |
| #include "sky/engine/core/rendering/RenderObject.h" |
| #include "sky/engine/core/rendering/RenderText.h" |
| #include "sky/engine/core/rendering/RenderView.h" |
| |
| namespace blink { |
| |
| RenderObject* RenderTreeBuilder::nextRenderer() const |
| { |
| ASSERT(m_renderingParent); |
| ASSERT(m_node); |
| |
| // Avoid an O(N^2) walk over the children when reattaching all children of a node. |
| if (m_renderingParent->needsAttach()) |
| return 0; |
| |
| for (Node* sibling = m_node->nextSibling(); sibling; sibling = sibling->nextSibling()) { |
| if (RenderObject* next = sibling->renderer()) |
| return next; |
| } |
| return nullptr; |
| } |
| |
| RenderObject* RenderTreeBuilder::parentRenderer() const |
| { |
| ASSERT(m_renderingParent); |
| return m_renderingParent->renderer(); |
| } |
| |
| bool RenderTreeBuilder::shouldCreateRenderer() const |
| { |
| if (!m_renderingParent) |
| return false; |
| RenderObject* parentRenderer = this->parentRenderer(); |
| if (!parentRenderer) |
| return false; |
| if (!parentRenderer->canHaveChildren()) |
| return false; |
| return true; |
| } |
| |
| RenderStyle& RenderTreeBuilder::style() const |
| { |
| if (!m_style) |
| m_style = toElement(m_node)->styleForRenderer(); |
| return *m_style; |
| } |
| |
| void RenderTreeBuilder::createRendererForElementIfNeeded() |
| { |
| ASSERT(!m_node->renderer()); |
| |
| if (!shouldCreateRenderer()) |
| return; |
| |
| Element* element = toElement(m_node); |
| RenderStyle& style = this->style(); |
| |
| if (style.display() == NONE) |
| return; |
| |
| RenderObject* newRenderer = element->createRenderer(&style); |
| if (!newRenderer) |
| return; |
| |
| RenderObject* parentRenderer = this->parentRenderer(); |
| |
| if (!parentRenderer->isChildAllowed(newRenderer, &style)) { |
| newRenderer->destroy(); |
| return; |
| } |
| |
| RenderObject* nextRenderer = this->nextRenderer(); |
| element->setRenderer(newRenderer); |
| newRenderer->setStyle(&style); // setStyle() can depend on renderer() already being set. |
| |
| // Note: Adding newRenderer instead of renderer(). renderer() may be a child of newRenderer. |
| parentRenderer->addChild(newRenderer, nextRenderer); |
| } |
| |
| void RenderTreeBuilder::createRendererForTextIfNeeded() |
| { |
| ASSERT(!m_node->renderer()); |
| |
| if (!shouldCreateRenderer()) |
| return; |
| |
| Text* textNode = toText(m_node); |
| RenderObject* parentRenderer = this->parentRenderer(); |
| |
| m_style = parentRenderer->style(); |
| |
| if (!textNode->textRendererIsNeeded(*m_style, *parentRenderer)) |
| return; |
| |
| RenderText* newRenderer = textNode->createTextRenderer(m_style.get()); |
| if (!parentRenderer->isChildAllowed(newRenderer, m_style.get())) { |
| newRenderer->destroy(); |
| return; |
| } |
| |
| RenderObject* nextRenderer = this->nextRenderer(); |
| textNode->setRenderer(newRenderer); |
| newRenderer->setStyle(m_style.release()); |
| parentRenderer->addChild(newRenderer, nextRenderer); |
| } |
| |
| } |