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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2004-2005 Allan Sandfeld Jensen (kde (at) carewolf.com)
      4  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit (at) nickshanks.com)
      5  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
      6  * Copyright (C) 2007 Alexey Proskuryakov <ap (at) webkit.org>
      7  * Copyright (C) 2007, 2008 Eric Seidel <eric (at) webkit.org>
      8  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
      9  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
     10  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
     11  * Copyright (C) 2012 Google Inc. All rights reserved.
     12  *
     13  * This library is free software; you can redistribute it and/or
     14  * modify it under the terms of the GNU Library General Public
     15  * License as published by the Free Software Foundation; either
     16  * version 2 of the License, or (at your option) any later version.
     17  *
     18  * This library is distributed in the hope that it will be useful,
     19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     21  * Library General Public License for more details.
     22  *
     23  * You should have received a copy of the GNU Library General Public License
     24  * along with this library; see the file COPYING.LIB.  If not, write to
     25  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     26  * Boston, MA 02110-1301, USA.
     27  */
     28 
     29 #include "config.h"
     30 #include "core/css/RuleFeature.h"
     31 
     32 #include "HTMLNames.h"
     33 #include "core/css/CSSSelector.h"
     34 #include "core/css/CSSSelectorList.h"
     35 
     36 namespace WebCore {
     37 
     38 void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector* selector)
     39 {
     40     if (selector->m_match == CSSSelector::Id)
     41         idsInRules.add(selector->value());
     42     else if (selector->m_match == CSSSelector::Class)
     43         classesInRules.add(selector->value());
     44     else if (selector->isAttributeSelector())
     45         attrsInRules.add(selector->attribute().localName());
     46     switch (selector->pseudoType()) {
     47     case CSSSelector::PseudoFirstLine:
     48         m_usesFirstLineRules = true;
     49         break;
     50         break;
     51     case CSSSelector::PseudoHost:
     52         collectFeaturesFromSelectorList(selector->selectorList());
     53         break;
     54     default:
     55         break;
     56     }
     57 }
     58 
     59 void RuleFeatureSet::collectFeaturesFromSelectorList(const CSSSelectorList* selectorList)
     60 {
     61     if (!selectorList)
     62         return;
     63 
     64     for (const CSSSelector* selector = selectorList->first(); selector; selector = CSSSelectorList::next(selector)) {
     65         for (const CSSSelector* subSelector = selector; subSelector; subSelector = subSelector->tagHistory())
     66             collectFeaturesFromSelector(subSelector);
     67     }
     68 }
     69 
     70 void RuleFeatureSet::add(const RuleFeatureSet& other)
     71 {
     72     HashSet<AtomicString>::const_iterator end = other.idsInRules.end();
     73     for (HashSet<AtomicString>::const_iterator it = other.idsInRules.begin(); it != end; ++it)
     74         idsInRules.add(*it);
     75     end = other.classesInRules.end();
     76     for (HashSet<AtomicString>::const_iterator it = other.classesInRules.begin(); it != end; ++it)
     77         classesInRules.add(*it);
     78     end = other.attrsInRules.end();
     79     for (HashSet<AtomicString>::const_iterator it = other.attrsInRules.begin(); it != end; ++it)
     80         attrsInRules.add(*it);
     81     siblingRules.append(other.siblingRules);
     82     uncommonAttributeRules.append(other.uncommonAttributeRules);
     83     m_usesFirstLineRules = m_usesFirstLineRules || other.m_usesFirstLineRules;
     84     m_maxDirectAdjacentSelectors = std::max(m_maxDirectAdjacentSelectors, other.maxDirectAdjacentSelectors());
     85 }
     86 
     87 void RuleFeatureSet::clear()
     88 {
     89     idsInRules.clear();
     90     classesInRules.clear();
     91     attrsInRules.clear();
     92     siblingRules.clear();
     93     uncommonAttributeRules.clear();
     94     m_usesFirstLineRules = false;
     95     m_maxDirectAdjacentSelectors = 0;
     96 }
     97 
     98 } // namespace WebCore
     99