sky/engine/core/dom/StyleSheetCollection.cpp - mojo-tools - Git at Google

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 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/config.h"
 #include "sky/engine/core/dom/StyleSheetCollection.h"

 #include "sky/engine/core/css/CSSStyleSheet.h"
 #include "sky/engine/core/css/resolver/StyleResolver.h"
 #include "sky/engine/core/dom/Document.h"
 #include "sky/engine/core/dom/StyleEngine.h"
 #include "sky/engine/core/dom/shadow/ShadowRoot.h"
 #include "sky/engine/core/dom/TreeScope.h"
 #include "sky/engine/core/html/HTMLStyleElement.h"

 namespace blink {

 StyleSheetCollection::StyleSheetCollection(TreeScope& treeScope)
     : m_treeScope(treeScope)
 {
 }

 StyleSheetCollection::~StyleSheetCollection()
 {
 }

 void StyleSheetCollection::addStyleSheetCandidateNode(Node* node, bool)
 {
     if (!node->inDocument())
         return;

     // Until the <body> exists, we have no choice but to compare document positions,
     // since styles outside of the body and head continue to be shunted into the head
     // (and thus can shift to end up before dynamically added DOM content that is also
     // outside the body).
     m_styleSheetCandidateNodes.add(node);
 }

 void StyleSheetCollection::removeStyleSheetCandidateNode(Node* node, ContainerNode* scopingNode)
 {
     m_styleSheetCandidateNodes.remove(node);
 }

 void StyleSheetCollection::collectStyleSheets(Vector<RefPtr<CSSStyleSheet>>& sheets)
 {
     DocumentOrderedList::iterator begin = m_styleSheetCandidateNodes.begin();
     DocumentOrderedList::iterator end = m_styleSheetCandidateNodes.end();
     for (DocumentOrderedList::iterator it = begin; it != end; ++it) {
         Node* node = *it;
         if (!isHTMLStyleElement(*node))
             continue;
         if (CSSStyleSheet* sheet = toHTMLStyleElement(node)->sheet())
             sheets.append(sheet);
     }
 }

 void StyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine)
 {
     Vector<RefPtr<CSSStyleSheet>> candidateSheets;
     collectStyleSheets(candidateSheets);

     Node& root = m_treeScope.rootNode();

     // TODO(esprehn): Remove special casing for Document.
     if (root.isDocumentNode()) {
         engine->clearResolver();
         // FIMXE: The following depends on whether StyleRuleFontFace was modified or not.
         // No need to always-clear font cache.
         engine->clearFontCache();
     } else if (StyleResolver* styleResolver = engine->resolver()) {
         // We should not destroy StyleResolver when we find any stylesheet update in a shadow tree.
         // In this case, we will reset rulesets created from style elements in the shadow tree.
         m_treeScope.scopedStyleResolver().resetAuthorStyle();
         styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets);
         styleResolver->lazyAppendAuthorStyleSheets(0, candidateSheets);
     }

     // TODO(esprehn): We should avoid subtree recalcs in sky when rules change
     // and only recalc specific tree scopes.
     root.setNeedsStyleRecalc(SubtreeStyleChange);

     // TODO(esprehn): We should use LocalStyleChange, :host rule changes
     // can only impact the host directly as Sky has no descendant selectors.
     if (root.isShadowRoot())
         toShadowRoot(root).host()->setNeedsStyleRecalc(SubtreeStyleChange);

     m_activeAuthorStyleSheets.swap(candidateSheets);
 }

 }
	/*
	* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
	* (C) 1999 Antti Koivisto (koivisto@kde.org)
	* (C) 2001 Dirk Mueller (mueller@kde.org)
	* (C) 2006 Alexey Proskuryakov (ap@webkit.org)
	* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
	* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
	* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
	* Copyright (C) 2013 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/config.h"
	#include "sky/engine/core/dom/StyleSheetCollection.h"

	#include "sky/engine/core/css/CSSStyleSheet.h"
	#include "sky/engine/core/css/resolver/StyleResolver.h"
	#include "sky/engine/core/dom/Document.h"
	#include "sky/engine/core/dom/StyleEngine.h"
	#include "sky/engine/core/dom/shadow/ShadowRoot.h"
	#include "sky/engine/core/dom/TreeScope.h"
	#include "sky/engine/core/html/HTMLStyleElement.h"

	namespace blink {

	StyleSheetCollection::StyleSheetCollection(TreeScope& treeScope)
	: m_treeScope(treeScope)
	{
	}

	StyleSheetCollection::~StyleSheetCollection()
	{
	}

	void StyleSheetCollection::addStyleSheetCandidateNode(Node* node, bool)
	{
	if (!node->inDocument())
	return;

	// Until the <body> exists, we have no choice but to compare document positions,
	// since styles outside of the body and head continue to be shunted into the head
	// (and thus can shift to end up before dynamically added DOM content that is also
	// outside the body).
	m_styleSheetCandidateNodes.add(node);
	}

	void StyleSheetCollection::removeStyleSheetCandidateNode(Node* node, ContainerNode* scopingNode)
	{
	m_styleSheetCandidateNodes.remove(node);
	}

	void StyleSheetCollection::collectStyleSheets(Vector<RefPtr<CSSStyleSheet>>& sheets)
	{
	DocumentOrderedList::iterator begin = m_styleSheetCandidateNodes.begin();
	DocumentOrderedList::iterator end = m_styleSheetCandidateNodes.end();
	for (DocumentOrderedList::iterator it = begin; it != end; ++it) {
	Node* node = *it;
	if (!isHTMLStyleElement(*node))
	continue;
	if (CSSStyleSheet* sheet = toHTMLStyleElement(node)->sheet())
	sheets.append(sheet);
	}
	}

	void StyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine)
	{
	Vector<RefPtr<CSSStyleSheet>> candidateSheets;
	collectStyleSheets(candidateSheets);

	Node& root = m_treeScope.rootNode();

	// TODO(esprehn): Remove special casing for Document.
	if (root.isDocumentNode()) {
	engine->clearResolver();
	// FIMXE: The following depends on whether StyleRuleFontFace was modified or not.
	// No need to always-clear font cache.
	engine->clearFontCache();
	} else if (StyleResolver* styleResolver = engine->resolver()) {
	// We should not destroy StyleResolver when we find any stylesheet update in a shadow tree.
	// In this case, we will reset rulesets created from style elements in the shadow tree.
	m_treeScope.scopedStyleResolver().resetAuthorStyle();
	styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets);
	styleResolver->lazyAppendAuthorStyleSheets(0, candidateSheets);
	}

	// TODO(esprehn): We should avoid subtree recalcs in sky when rules change
	// and only recalc specific tree scopes.
	root.setNeedsStyleRecalc(SubtreeStyleChange);

	// TODO(esprehn): We should use LocalStyleChange, :host rule changes
	// can only impact the host directly as Sky has no descendant selectors.
	if (root.isShadowRoot())
	toShadowRoot(root).host()->setNeedsStyleRecalc(SubtreeStyleChange);

	m_activeAuthorStyleSheets.swap(candidateSheets);
	}

	}