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/*
* Copyright (C) 2007, 2008, 2009 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 "JSCSSStyleDeclarationCustom.h"
#include "CSSMutableStyleDeclaration.h"
#include "CSSPrimitiveValue.h"
#include "CSSValue.h"
#include "JSCSSValue.h"
#include "JSNode.h"
#include "PlatformString.h"
#include <runtime/StringObjectThatMasqueradesAsUndefined.h>
#include <runtime/StringPrototype.h>
#include <wtf/ASCIICType.h>
#include <wtf/text/AtomicString.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/StringConcatenate.h>
using namespace JSC;
using namespace WTF;
namespace WebCore {
void JSCSSStyleDeclaration::visitChildren(SlotVisitor& visitor)
{
Base::visitChildren(visitor);
visitor.addOpaqueRoot(root(impl()));
}
// Check for a CSS prefix.
// Passed prefix is all lowercase.
// First character of the prefix within the property name may be upper or lowercase.
// Other characters in the prefix within the property name must be lowercase.
// The prefix within the property name must be followed by a capital letter.
static bool hasCSSPropertyNamePrefix(const Identifier& propertyName, const char* prefix)
{
#ifndef NDEBUG
ASSERT(*prefix);
for (const char* p = prefix; *p; ++p)
ASSERT(isASCIILower(*p));
ASSERT(propertyName.length());
#endif
if (toASCIILower(propertyName.characters()[0]) != prefix[0])
return false;
unsigned length = propertyName.length();
for (unsigned i = 1; i < length; ++i) {
if (!prefix[i])
return isASCIIUpper(propertyName.characters()[i]);
if (propertyName.characters()[i] != prefix[i])
return false;
}
return false;
}
static String cssPropertyName(const Identifier& propertyName, bool* hadPixelOrPosPrefix = 0)
{
if (hadPixelOrPosPrefix)
*hadPixelOrPosPrefix = false;
unsigned length = propertyName.length();
if (!length)
return String();
StringBuilder builder;
builder.reserveCapacity(length);
unsigned i = 0;
if (hasCSSPropertyNamePrefix(propertyName, "css"))
i += 3;
else if (hasCSSPropertyNamePrefix(propertyName, "pixel")) {
i += 5;
if (hadPixelOrPosPrefix)
*hadPixelOrPosPrefix = true;
} else if (hasCSSPropertyNamePrefix(propertyName, "pos")) {
i += 3;
if (hadPixelOrPosPrefix)
*hadPixelOrPosPrefix = true;
} else if (hasCSSPropertyNamePrefix(propertyName, "webkit")
|| hasCSSPropertyNamePrefix(propertyName, "khtml")
|| hasCSSPropertyNamePrefix(propertyName, "apple")
|| hasCSSPropertyNamePrefix(propertyName, "epub"))
builder.append('-');
else {
if (isASCIIUpper(propertyName.characters()[0]))
return String();
}
builder.append(toASCIILower(propertyName.characters()[i++]));
for (; i < length; ++i) {
UChar c = propertyName.characters()[i];
if (!isASCIIUpper(c))
builder.append(c);
else
builder.append(makeString('-', toASCIILower(c)));
}
return builder.toString();
}
static bool isCSSPropertyName(const Identifier& propertyIdentifier)
{
// FIXME: This mallocs a string for the property name and then throws it
// away. This shows up on peacekeeper's domDynamicCreationCreateElement.
return CSSStyleDeclaration::isPropertyName(cssPropertyName(propertyIdentifier));
}
bool JSCSSStyleDeclaration::canGetItemsForName(ExecState*, CSSStyleDeclaration*, const Identifier& propertyName)
{
return isCSSPropertyName(propertyName);
}
// FIXME: You can get these properties, and set them (see putDelegate below),
// but you should also be able to enumerate them.
JSValue JSCSSStyleDeclaration::nameGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
{
JSCSSStyleDeclaration* thisObj = static_cast<JSCSSStyleDeclaration*>(asObject(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(exec, 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 StringObjectThatMasqueradesAsUndefined::create(exec, stringToUString(thisObj->impl()->getPropertyValue(prop)));
return jsString(exec, thisObj->impl()->getPropertyValue(prop));
}
bool JSCSSStyleDeclaration::putDelegate(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot&)
{
bool pixelOrPos;
String prop = cssPropertyName(propertyName, &pixelOrPos);
if (!CSSStyleDeclaration::isPropertyName(prop))
return false;
String propValue = valueToStringWithNullCheck(exec, value);
if (pixelOrPos)
propValue += "px";
ExceptionCode ec = 0;
impl()->setProperty(prop, propValue, ec);
setDOMException(exec, ec);
return true;
}
JSValue JSCSSStyleDeclaration::getPropertyCSSValue(ExecState* exec)
{
const String& propertyName(ustringToString(exec->argument(0).toString(exec)));
if (exec->hadException())
return jsUndefined();
RefPtr<CSSValue> cssValue = impl()->getPropertyCSSValue(propertyName);
if (!cssValue)
return jsNull();
currentWorld(exec)->m_cssValueRoots.add(cssValue.get(), root(impl())); // Balanced by JSCSSValueOwner::finalize().
return toJS(exec, globalObject(), WTF::getPtr(cssValue));
}
} // namespace WebCore
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