/**

 * This file is part of the DOM implementation for KDE.

 *

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

 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.

 *

 * 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 "CSSProperty.h"

#include "CSSPropertyNames.h"

#include "CSSRule.h"

#include "DeprecatedValueList.h"

#include "ksvgcssproperties.h"

#include <ctype.h>

namespace WebCore {

// Defined in CSSGrammar.y, but not in any header, so just declare it here for now.

int getPropertyID(const char* str, int len);

static int propertyID(const String& s)

{

    char buffer[maxCSSPropertyNameLength];

    unsigned len = s.length();

    if (len > maxCSSPropertyNameLength)

        return 0;

    for (unsigned i = 0; i != len; ++i) {

        UChar c = s[i];

        if (c == 0 || c >= 0x7F)

            return 0; // illegal character

        buffer[i] = tolower(c);

    }

    int propID = getPropertyID(buffer, len);

#if ENABLE(SVG)

    if (!propID)

        propID = SVG::getSVGCSSPropertyID(buffer, len);

#endif

    return propID;

}

CSSStyleDeclaration::CSSStyleDeclaration(CSSRule* parent)

    : StyleBase(parent)

{

}

bool CSSStyleDeclaration::isStyleDeclaration()

{

    return true;

}

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

{

    int propID = propertyID(propertyName);

    if (!propID)

        return 0;

    return getPropertyCSSValue(propID);

}

String CSSStyleDeclaration::getPropertyValue(const String &propertyName)

{

    int propID = propertyID(propertyName);

    if (!propID)

        return String();

    return getPropertyValue(propID);

}

String CSSStyleDeclaration::getPropertyPriority(const String& propertyName)

{

    int propID = propertyID(propertyName);

    if (!propID)

        return String();

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

}

String CSSStyleDeclaration::getPropertyShorthand(const String& propertyName)

{

    int propID = propertyID(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 = propertyID(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 = propertyID(propertyName);

    if (!propID)

        // FIXME: set exception?

        return;

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

    setProperty(propID, value, important, ec);

}

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

{

    int propID = propertyID(propertyName);

    if (!propID)

        return String();

    return removeProperty(propID, ec);

}

bool CSSStyleDeclaration::isPropertyName(const String& propertyName)

{

    return propertyID(propertyName);

}

CSSRule* CSSStyleDeclaration::parentRule() const

{

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

}

void CSSStyleDeclaration::diff(CSSMutableStyleDeclaration* style) const

{

    if (!style)

        return;

    Vector<int> properties;

    DeprecatedValueListConstIterator<CSSProperty> end;

    for (DeprecatedValueListConstIterator<CSSProperty> it(style->valuesIterator()); it != end; ++it) {

        const CSSProperty& property = *it;

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

        if (value && (value->cssText() == property.value()->cssText()))

            properties.append(property.id());

    }

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

        style->removeProperty(properties[i]);

}

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

{

    DeprecatedValueList<CSSProperty> list;

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

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

        if (value)

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

    }

    return new CSSMutableStyleDeclaration(0, list);

}

} // namespace WebCore