C++ (Cpp) getCSSPropertyNamePrefix Examples

Example #1

File: JSCSSStyleDeclarationCustom.cpp Project: CannedFish/deepin-webkit

static String cssPropertyName(const Identifier& propertyName, bool* hadPixelOrPosPrefix = 0)
{
    if (hadPixelOrPosPrefix)
        *hadPixelOrPosPrefix = false;

    unsigned length = propertyName.length();
    if (!length)
        return String();

    StringImpl* propertyNameString = propertyName.impl();
    // If there is no uppercase character in the propertyName, there can
    // be no prefix, nor extension and we can return the same string.
    if (!containsASCIIUpperChar(*propertyNameString))
        return String(propertyNameString);

    StringBuilder builder;
    builder.reserveCapacity(length);

    unsigned i = 0;
    switch (getCSSPropertyNamePrefix(*propertyNameString)) {
    case PropertyNamePrefixNone:
        if (isASCIIUpper((*propertyNameString)[0]))
            return String();
        break;
    case PropertyNamePrefixCSS:
        i += 3;
        break;
    case PropertyNamePrefixPixel:
        i += 5;
        if (hadPixelOrPosPrefix)
            *hadPixelOrPosPrefix = true;
        break;
    case PropertyNamePrefixPos:
        i += 3;
        if (hadPixelOrPosPrefix)
            *hadPixelOrPosPrefix = true;
        break;
    case PropertyNamePrefixApple:
    case PropertyNamePrefixEpub:
    case PropertyNamePrefixKHTML:
    case PropertyNamePrefixWebKit:
        builder.append('-');
    }

    builder.append(toASCIILower((*propertyNameString)[i++]));

    for (; i < length; ++i) {
        UChar c = (*propertyNameString)[i];
        if (!isASCIIUpper(c))
            builder.append(c);
        else
            builder.append(makeString('-', toASCIILower(c)));
    }

    return builder.toString();
}

Example #2

File: JSCSSStyleDeclarationCustom.cpp Project: xiejinfeng850414/webkit

static CSSPropertyInfo cssPropertyIDForJSCSSPropertyName(PropertyName propertyName)
{
    CSSPropertyInfo propertyInfo = {CSSPropertyInvalid, false};
    bool hadPixelOrPosPrefix = false;

    StringImpl* propertyNameString = propertyName.publicName();
    if (!propertyNameString)
        return propertyInfo;
    unsigned length = propertyNameString->length();
    if (!length)
        return propertyInfo;

    String stringForCache = String(propertyNameString);
    typedef HashMap<String, CSSPropertyInfo> CSSPropertyInfoMap;
    static NeverDestroyed<CSSPropertyInfoMap> propertyInfoCache;
    propertyInfo = propertyInfoCache.get().get(stringForCache);
    if (propertyInfo.propertyID)
        return propertyInfo;

    const size_t bufferSize = maxCSSPropertyNameLength + 1;
    char buffer[bufferSize];
    char* bufferPtr = buffer;
    const char* name = bufferPtr;

    unsigned i = 0;
    // Prefixes CSS, Pixel, Pos are ignored.
    // Prefixes Apple, KHTML and Webkit are transposed to "-webkit-".
    // The prefix "Epub" becomes "-epub-".
    switch (getCSSPropertyNamePrefix(*propertyNameString)) {
    case PropertyNamePrefixNone:
        if (isASCIIUpper((*propertyNameString)[0]))
            return propertyInfo;
        break;
    case PropertyNamePrefixCSS:
        i += 3;
        break;
    case PropertyNamePrefixPixel:
        i += 5;
        hadPixelOrPosPrefix = true;
        break;
    case PropertyNamePrefixPos:
        i += 3;
        hadPixelOrPosPrefix = true;
        break;
#if ENABLE(LEGACY_CSS_VENDOR_PREFIXES)
    case PropertyNamePrefixApple:
    case PropertyNamePrefixKHTML:
        ASSERT(RuntimeEnabledFeatures::sharedFeatures().legacyCSSVendorPrefixesEnabled());
        writeWebKitPrefix(bufferPtr);
        i += 5;
        break;
#endif
    case PropertyNamePrefixEpub:
        writeEpubPrefix(bufferPtr);
        i += 4;
        break;
    case PropertyNamePrefixWebKit:
        writeWebKitPrefix(bufferPtr);
        i += 6;
        break;
    }

    *bufferPtr++ = toASCIILower((*propertyNameString)[i++]);

    char* bufferEnd = buffer + bufferSize;
    char* stringEnd = bufferEnd - 1;
    size_t bufferSizeLeft = stringEnd - bufferPtr;
    size_t propertySizeLeft = length - i;
    if (propertySizeLeft > bufferSizeLeft)
        return propertyInfo;

    for (; i < length; ++i) {
        UChar c = (*propertyNameString)[i];
        if (!c || c >= 0x7F)
            return propertyInfo; // illegal character
        if (isASCIIUpper(c)) {
            size_t bufferSizeLeft = stringEnd - bufferPtr;
            size_t propertySizeLeft = length - i + 1;
            if (propertySizeLeft > bufferSizeLeft)
                return propertyInfo;
            *bufferPtr++ = '-';
            *bufferPtr++ = toASCIILower(c);
        } else
            *bufferPtr++ = c;
        ASSERT_WITH_SECURITY_IMPLICATION(bufferPtr < bufferEnd);
    }
    ASSERT_WITH_SECURITY_IMPLICATION(bufferPtr < bufferEnd);
    *bufferPtr = '\0';

    unsigned outputLength = bufferPtr - buffer;
#if PLATFORM(IOS)
    cssPropertyNameIOSAliasing(buffer, name, outputLength);
#endif

    const Property* hashTableEntry = findProperty(name, outputLength);
    int propertyID = hashTableEntry ? hashTableEntry->id : 0;
    if (propertyID) {
        propertyInfo.hadPixelOrPosPrefix = hadPixelOrPosPrefix;
        propertyInfo.propertyID = static_cast<CSSPropertyID>(propertyID);
        propertyInfoCache.get().add(stringForCache, propertyInfo);
    }
    return propertyInfo;
}