/*
 * 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/RuleFeature.h"

#include "sky/engine/core/css/CSSSelector.h"
#include "sky/engine/core/css/CSSSelectorList.h"
#include "sky/engine/core/css/RuleSet.h"
#include "sky/engine/core/css/StyleRule.h"
#include "sky/engine/core/dom/Element.h"
#include "sky/engine/core/dom/Node.h"
#include "sky/engine/wtf/BitVector.h"

namespace blink {

RuleFeatureSet::RuleFeatureSet()
{
}

RuleFeatureSet::~RuleFeatureSet()
{
}

void RuleFeatureSet::addSelectorFeatures(const CSSSelector& selector)
{
    if (selector.match() == CSSSelector::Class)
        m_classNames.add(selector.value());
    else if (selector.match() == CSSSelector::Id)
        m_idNames.add(selector.value());
    else if (selector.isAttributeSelector())
        m_attributeNames.add(selector.attribute().localName());
}

void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector)
{
    for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
        addSelectorFeatures(*current);
        collectFeaturesFromSelectorList(current->selectorList());
   }
}

void RuleFeatureSet::collectFeaturesFromSelectorList(const CSSSelectorList* selectorList)
{
    if (!selectorList)
        return;

    for (const CSSSelector* selector = selectorList->first(); selector; selector = CSSSelectorList::next(*selector))
        collectFeaturesFromSelector(*selector);
}

void RuleFeatureSet::add(const RuleFeatureSet& other)
{
    for (HashSet<AtomicString>::const_iterator it = other.m_classNames.begin(); it != other.m_classNames.end(); ++it)
        m_classNames.add(*it);
    for (HashSet<AtomicString>::const_iterator it = other.m_attributeNames.begin(); it != other.m_attributeNames.end(); ++it)
        m_attributeNames.add(*it);
    for (HashSet<AtomicString>::const_iterator it = other.m_idNames.begin(); it != other.m_idNames.end(); ++it)
        m_idNames.add(*it);
}

void RuleFeatureSet::clear()
{
    m_classNames.clear();
    m_attributeNames.clear();
    m_idNames.clear();
}

} // namespace blink