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();
}
// 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;
}
