/*

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#include "config.h"

#include "JSCSSStyleDeclaration.h"

#include "AtomicString.h"

#include "CSSPrimitiveValue.h"

#include "CSSStyleDeclaration.h"

#include "CSSValue.h"

#include "DeprecatedString.h"

#include "PlatformString.h"

#include <kjs/string_object.h>

namespace WebCore {

using namespace KJS;

static String cssPropertyName(const Identifier& propertyName, bool* hadPixelOrPosPrefix = 0)

{

    DeprecatedString prop = propertyName;

    int i = prop.length();

    if (!i)

        return prop;

    while (--i) {

        ::UChar c = prop[i].unicode();

        if (c >= 'A' && c <= 'Z')

            prop.insert(i, '-');

    }

    prop = prop.lower();

    if (hadPixelOrPosPrefix)

        *hadPixelOrPosPrefix = false;

    if (prop.startsWith("css-"))

        prop = prop.mid(4);

    else if (prop.startsWith("pixel-")) {

        prop = prop.mid(6);

        if (hadPixelOrPosPrefix)

            *hadPixelOrPosPrefix = true;

    } else if (prop.startsWith("pos-")) {

        prop = prop.mid(4);

        if (hadPixelOrPosPrefix)

            *hadPixelOrPosPrefix = true;

    } else if (prop.startsWith("khtml-") || prop.startsWith("apple-") || prop.startsWith("webkit-"))

        prop.insert(0, '-');

    return prop;

}

static bool isCSSPropertyName(const Identifier& propertyName)

{

    return CSSStyleDeclaration::isPropertyName(cssPropertyName(propertyName));

}

bool JSCSSStyleDeclaration::canGetItemsForName(ExecState*, CSSStyleDeclaration*, const Identifier& propertyName)

{

    return isCSSPropertyName(propertyName);

}

JSValue* JSCSSStyleDeclaration::nameGetter(ExecState* exec, JSObject* originalObject, const Identifier& propertyName, const PropertySlot& slot)

{

    JSCSSStyleDeclaration* thisObj = static_cast<JSCSSStyleDeclaration*>(slot.slotBase());

    // Set up pixelOrPos boolean to handle the fact that

    // pixelTop returns "CSS Top" as number value in unit pixels

    // posTop returns "CSS top" as number value in unit pixels _if_ its a

    // positioned element. if it is not a positioned element, return 0

    // from MSIE documentation FIXME: IMPLEMENT THAT (Dirk)

    bool pixelOrPos;

    String prop = cssPropertyName(propertyName, &pixelOrPos);

    RefPtr<CSSValue> v = thisObj->impl()->getPropertyCSSValue(prop);

    if (v) {

        if (pixelOrPos && v->cssValueType() == CSSValue::CSS_PRIMITIVE_VALUE)

            return jsNumber(static_pointer_cast<CSSPrimitiveValue>(v)->getFloatValue(CSSPrimitiveValue::CSS_PX));

        return jsStringOrNull(v->cssText());

    }

    // If the property is a shorthand property (such as "padding"), 

    // it can only be accessed using getPropertyValue.

    // Make the SVG 'filter' attribute undetectable, to avoid confusion with the IE 'filter' attribute.

    if (propertyName == "filter")

        return new StringInstanceThatMasqueradesAsUndefined(exec->lexicalInterpreter()->builtinStringPrototype(), thisObj->impl()->getPropertyValue(prop));

    return jsString(thisObj->impl()->getPropertyValue(prop));

}

bool JSCSSStyleDeclaration::customPut(ExecState* exec, const Identifier& propertyName, JSValue* value, int /*attr*/)

{

    if (!isCSSPropertyName(propertyName))

        return false;

    DOMExceptionTranslator exception(exec);

    bool pixelOrPos;

    String prop = cssPropertyName(propertyName, &pixelOrPos);

    String propValue = valueToStringWithNullCheck(exec, value);

    if (pixelOrPos)

        propValue += "px";

    impl()->setProperty(prop, propValue, exception);

    return true;

}

} // namespace WebCore