/*

 * (C) 1999-2003 Lars Knoll (knoll@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple 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 "CSSStyleDeclaration.h"

#include "CSSMutableStyleDeclaration.h"

#include "CSSParser.h"

#include "CSSProperty.h"

#include "CSSPropertyNames.h"

#include "CSSRule.h"

#include <wtf/ASCIICType.h>

using namespace WTF;

namespace WebCore {

CSSStyleDeclaration::CSSStyleDeclaration(CSSRule* parent)

    : StyleBase(parent)

{

}

PassRefPtr<CSSValue> CSSStyleDeclaration::getPropertyCSSValue(const String& propertyName)

{

    int propID = cssPropertyID(propertyName);

    if (!propID)

        return 0;

    return getPropertyCSSValue(propID);

}

String CSSStyleDeclaration::getPropertyValue(const String &propertyName)

{

    int propID = cssPropertyID(propertyName);

    if (!propID)

        return String();

    return getPropertyValue(propID);

}

String CSSStyleDeclaration::getPropertyPriority(const String& propertyName)

{

    int propID = cssPropertyID(propertyName);

    if (!propID)

        return String();

    return getPropertyPriority(propID) ? "important" : "";

}

String CSSStyleDeclaration::getPropertyShorthand(const String& propertyName)

{

    int propID = cssPropertyID(propertyName);

    if (!propID)

        return String();

    int shorthandID = getPropertyShorthand(propID);

    if (!shorthandID)

        return String();

    return getPropertyName(static_cast<CSSPropertyID>(shorthandID));

}

bool CSSStyleDeclaration::isPropertyImplicit(const String& propertyName)

{

    int propID = cssPropertyID(propertyName);

    if (!propID)

        return false;

    return isPropertyImplicit(propID);

}

void CSSStyleDeclaration::setProperty(const String& propertyName, const String& value, ExceptionCode& ec)

{

    int important = value.find("!important", 0, false);

    if (important == -1)

        setProperty(propertyName, value, "", ec);

    else

        setProperty(propertyName, value.left(important - 1), "important", ec);

}

void CSSStyleDeclaration::setProperty(const String& propertyName, const String& value, const String& priority, ExceptionCode& ec)

{

    int propID = cssPropertyID(propertyName);

    if (!propID) {

        // FIXME: Should we raise an exception here?

        return;

    }

    bool important = priority.find("important", 0, false) != -1;

    setProperty(propID, value, important, ec);

}

String CSSStyleDeclaration::removeProperty(const String& propertyName, ExceptionCode& ec)

{

    int propID = cssPropertyID(propertyName);

    if (!propID)

        return String();

    return removeProperty(propID, ec);

}

bool CSSStyleDeclaration::isPropertyName(const String& propertyName)

{

    return cssPropertyID(propertyName);

}

CSSRule* CSSStyleDeclaration::parentRule() const

{

    return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;

}

bool CSSStyleDeclaration::cssPropertyMatches(const CSSProperty* property) const

{

    RefPtr<CSSValue> value = getPropertyCSSValue(property->id());

    return value && value->cssText() == property->value()->cssText();

}

void CSSStyleDeclaration::diff(CSSMutableStyleDeclaration* style) const

{

    if (!style)

        return;

    Vector<int> propertiesToRemove;

    {

        CSSMutableStyleDeclaration::const_iterator end = style->end();

        for (CSSMutableStyleDeclaration::const_iterator it = style->begin(); it != end; ++it) {

            const CSSProperty& property = *it;

            if (cssPropertyMatches(&property))

                propertiesToRemove.append(property.id());

        }

    }

    // FIXME: This should use mass removal.

    for (unsigned i = 0; i < propertiesToRemove.size(); i++)

        style->removeProperty(propertiesToRemove[i]);

}

PassRefPtr<CSSMutableStyleDeclaration> CSSStyleDeclaration::copyPropertiesInSet(const int* set, unsigned length) const

{

    Vector<CSSProperty> list;

    list.reserveInitialCapacity(length);

    unsigned variableDependentValueCount = 0;

    for (unsigned i = 0; i < length; i++) {

        RefPtr<CSSValue> value = getPropertyCSSValue(set[i]);

        if (value) {

            if (value->isVariableDependentValue())

                variableDependentValueCount++;

            list.append(CSSProperty(set[i], value.release(), false));

        }

    }

    return CSSMutableStyleDeclaration::create(list, variableDependentValueCount);

}

} // namespace WebCore