| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com) |
| * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com) |
| * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved. |
| * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org> |
| * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| * Copyright (C) Research In Motion Limited 2011. All rights reserved. |
| * Copyright (C) 2012 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/css/RuleSet.h" |
| |
| #include "gen/sky/platform/RuntimeEnabledFeatures.h" |
| #include "sky/engine/core/css/CSSFontSelector.h" |
| #include "sky/engine/core/css/CSSSelector.h" |
| #include "sky/engine/core/css/CSSSelectorList.h" |
| #include "sky/engine/core/css/SelectorChecker.h" |
| #include "sky/engine/core/css/StyleSheetContents.h" |
| #include "sky/engine/platform/TraceEvent.h" |
| #include "sky/engine/wtf/TerminatedArrayBuilder.h" |
| |
| namespace blink { |
| |
| // ----------------------------------------------------------------- |
| |
| RuleData::RuleData(StyleRule* rule, unsigned selectorIndex, unsigned position) |
| : m_rule(rule) |
| , m_selectorIndex(selectorIndex) |
| , m_isLastInArray(false) |
| , m_position(position) |
| { |
| ASSERT(m_position == position); |
| ASSERT(m_selectorIndex == selectorIndex); |
| } |
| |
| void RuleSet::addToRuleSet(const AtomicString& key, PendingRuleMap& map, const RuleData& ruleData) |
| { |
| OwnPtr<LinkedStack<RuleData> >& rules = map.add(key, nullptr).storedValue->value; |
| if (!rules) |
| rules = adoptPtr(new LinkedStack<RuleData>); |
| rules->push(ruleData); |
| } |
| |
| static void extractValuesforSelector(const CSSSelector* selector, AtomicString& id, AtomicString& className, AtomicString& customPseudoElementName, AtomicString& tagName) |
| { |
| switch (selector->match()) { |
| case CSSSelector::Id: |
| id = selector->value(); |
| break; |
| case CSSSelector::Class: |
| className = selector->value(); |
| break; |
| case CSSSelector::Tag: |
| if (selector->tagQName().localName() != starAtom) |
| tagName = selector->tagQName().localName(); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| bool RuleSet::findBestRuleSetAndAdd(const CSSSelector& component, RuleData& ruleData) |
| { |
| AtomicString id; |
| AtomicString className; |
| AtomicString customPseudoElementName; |
| AtomicString tagName; |
| |
| #ifndef NDEBUG |
| m_allRules.append(ruleData); |
| #endif |
| |
| const CSSSelector* it = &component; |
| |
| if (it->pseudoType() == CSSSelector::PseudoHost) { |
| m_hostRules.append(ruleData); |
| return true; |
| } |
| |
| for (; it; it = it->tagHistory()) { |
| // Host rules can't match when combined with other selectors, so we just |
| // ignore them. |
| if (it->pseudoType() == CSSSelector::PseudoHost) |
| return true; |
| extractValuesforSelector(it, id, className, customPseudoElementName, tagName); |
| } |
| |
| // Prefer rule sets in order of most likely to apply infrequently. |
| if (!id.isEmpty()) { |
| addToRuleSet(id, ensurePendingRules()->idRules, ruleData); |
| return true; |
| } |
| if (!className.isEmpty()) { |
| addToRuleSet(className, ensurePendingRules()->classRules, ruleData); |
| return true; |
| } |
| if (!tagName.isEmpty()) { |
| addToRuleSet(tagName, ensurePendingRules()->tagRules, ruleData); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void RuleSet::addRule(StyleRule* rule, unsigned selectorIndex) |
| { |
| RuleData ruleData(rule, selectorIndex, m_ruleCount++); |
| m_features.collectFeaturesFromSelector(ruleData.selector()); |
| |
| if (!findBestRuleSetAndAdd(ruleData.selector(), ruleData)) { |
| // If we didn't find a specialized map to stick it in, file under universal rules. |
| m_universalRules.append(ruleData); |
| } |
| } |
| |
| void RuleSet::addFontFaceRule(StyleRuleFontFace* rule) |
| { |
| ensurePendingRules(); // So that m_fontFaceRules.shrinkToFit() gets called. |
| m_fontFaceRules.append(rule); |
| } |
| |
| void RuleSet::addChildRules(const Vector<RefPtr<StyleRuleBase> >& rules) |
| { |
| for (unsigned i = 0; i < rules.size(); ++i) { |
| StyleRuleBase* rule = rules[i].get(); |
| |
| if (rule->isStyleRule()) { |
| StyleRule* styleRule = toStyleRule(rule); |
| |
| const CSSSelectorList& selectorList = styleRule->selectorList(); |
| for (size_t selectorIndex = 0; selectorIndex != kNotFound; selectorIndex = selectorList.indexOfNextSelectorAfter(selectorIndex)) |
| addRule(styleRule, selectorIndex); |
| } else if (rule->isFontFaceRule()) { |
| addFontFaceRule(toStyleRuleFontFace(rule)); |
| } else if (rule->isSupportsRule() && toStyleRuleSupports(rule)->conditionIsSupported()) { |
| addChildRules(toStyleRuleSupports(rule)->childRules()); |
| } |
| } |
| } |
| |
| void RuleSet::addRulesFromSheet(StyleSheetContents* sheet) |
| { |
| TRACE_EVENT0("blink", "RuleSet::addRulesFromSheet"); |
| ASSERT(sheet); |
| addChildRules(sheet->childRules()); |
| } |
| |
| void RuleSet::addStyleRule(StyleRule* rule) |
| { |
| for (size_t selectorIndex = 0; selectorIndex != kNotFound; selectorIndex = rule->selectorList().indexOfNextSelectorAfter(selectorIndex)) |
| addRule(rule, selectorIndex); |
| } |
| |
| void RuleSet::compactPendingRules(PendingRuleMap& pendingMap, CompactRuleMap& compactMap) |
| { |
| PendingRuleMap::iterator end = pendingMap.end(); |
| for (PendingRuleMap::iterator it = pendingMap.begin(); it != end; ++it) { |
| OwnPtr<LinkedStack<RuleData> > pendingRules = it->value.release(); |
| CompactRuleMap::ValueType* compactRules = compactMap.add(it->key, nullptr).storedValue; |
| |
| TerminatedArrayBuilder<RuleData> builder(compactRules->value.release()); |
| builder.grow(pendingRules->size()); |
| while (!pendingRules->isEmpty()) { |
| builder.append(pendingRules->peek()); |
| pendingRules->pop(); |
| } |
| |
| compactRules->value = builder.release(); |
| } |
| } |
| |
| void RuleSet::compactRules() |
| { |
| ASSERT(m_pendingRules); |
| OwnPtr<PendingRuleMaps> pendingRules = m_pendingRules.release(); |
| compactPendingRules(pendingRules->idRules, m_idRules); |
| compactPendingRules(pendingRules->classRules, m_classRules); |
| compactPendingRules(pendingRules->tagRules, m_tagRules); |
| m_universalRules.shrinkToFit(); |
| m_fontFaceRules.shrinkToFit(); |
| } |
| |
| #ifndef NDEBUG |
| void RuleSet::show() |
| { |
| for (Vector<RuleData>::const_iterator it = m_allRules.begin(); it != m_allRules.end(); ++it) |
| it->selector().show(); |
| } |
| #endif |
| |
| } // namespace blink |