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/*
* 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 "config.h"
#include "core/dom/ShadowTreeStyleSheetCollection.h"
#include "core/HTMLNames.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Element.h"
#include "core/dom/StyleEngine.h"
#include "core/dom/StyleSheetCandidate.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/html/HTMLStyleElement.h"
namespace blink {
using namespace HTMLNames;
ShadowTreeStyleSheetCollection::ShadowTreeStyleSheetCollection(ShadowRoot& shadowRoot)
: TreeScopeStyleSheetCollection(shadowRoot)
{
}
void ShadowTreeStyleSheetCollection::collectStyleSheets(StyleEngine* engine, StyleSheetCollection& collection)
{
for (Node* n : m_styleSheetCandidateNodes) {
StyleSheetCandidate candidate(*n);
ASSERT(!candidate.isXSL());
if (!candidate.isCSSStyle())
continue;
StyleSheet* sheet = candidate.sheet();
if (!sheet)
continue;
// FIXME: clarify how PREFERRED or ALTERNATE works in shadow trees.
// Should we set preferred/selected stylesheets name in shadow trees and
// use the name in document?
if (candidate.hasPreferrableName(engine->preferredStylesheetSetName()))
engine->selectStylesheetSetName(candidate.title());
collection.appendSheetForList(sheet);
if (candidate.canBeActivated(engine->preferredStylesheetSetName()))
collection.appendActiveStyleSheet(toCSSStyleSheet(sheet));
}
}
void ShadowTreeStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode)
{
StyleSheetCollection collection;
collectStyleSheets(engine, collection);
StyleSheetChange change;
analyzeStyleSheetChange(updateMode, collection, change);
if (StyleResolver* styleResolver = engine->resolver()) {
if (change.styleResolverUpdateType != Additive) {
// 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.
styleResolver->resetAuthorStyle(treeScope());
styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets);
styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets());
} else {
styleResolver->lazyAppendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), collection.activeAuthorStyleSheets());
}
}
if (change.requiresFullStyleRecalc)
toShadowRoot(treeScope().rootNode()).host()->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::ActiveStylesheetsUpdate));
collection.swap(*this);
updateUsesRemUnits();
}
}
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