static bool parseDescriptors(const CharType* attribute, Vector<DescriptorToken>& descriptors, DescriptorParsingResult& result)
{
for (Vector<DescriptorToken>::iterator it = descriptors.begin(); it != descriptors.end(); ++it) {
if (it->length == 0)
continue;
CharType c = attribute[it->lastIndex()];
bool isValid = false;
if (RuntimeEnabledFeatures::pictureSizesEnabled() && c == 'w') {
if (result.hasDensity() || result.hasWidth())
return false;
int resourceWidth = it->toInt(attribute, isValid);
if (!isValid || resourceWidth <= 0)
return false;
result.setResourceWidth(resourceWidth);
} else if (RuntimeEnabledFeatures::pictureSizesEnabled() && c == 'h') {
// This is here only for future compat purposes.
// The value of the 'h' descriptor is not used.
if (result.hasDensity() || result.hasHeight())
return false;
int resourceHeight = it->toInt(attribute, isValid);
if (!isValid || resourceHeight <= 0)
return false;
result.setResourceHeight(resourceHeight);
} else if (c == 'x') {
if (result.hasDensity() || result.hasHeight() || result.hasWidth())
return false;
float density = it->toFloat(attribute, isValid);
if (!isValid || density < 0)
return false;
result.setDensity(density);
}
}
return true;
}
static bool parseDescriptors(Vector<StringView>& descriptors, DescriptorParsingResult& result)
{
for (auto& descriptor : descriptors) {
if (descriptor.isEmpty())
continue;
unsigned descriptorCharPosition = descriptor.length() - 1;
UChar descriptorChar = descriptor[descriptorCharPosition];
descriptor = descriptor.substring(0, descriptorCharPosition);
bool isValid = false;
if (descriptorChar == 'x') {
if (result.hasDensity() || result.hasHeight() || result.hasWidth())
return false;
float density = descriptor.toFloat(isValid);
if (!isValid || density < 0)
return false;
result.setDensity(density);
} else if (descriptorChar == 'w') {
#if ENABLE(PICTURE_SIZES)
if (result.hasDensity() || result.hasWidth())
return false;
int resourceWidth = descriptor.toInt(isValid);
if (!isValid || resourceWidth <= 0)
return false;
result.setResourceWidth(resourceWidth);
#else
return false;
#endif
} else if (descriptorChar == 'h') {
#if ENABLE(PICTURE_SIZES)
// This is here only for future compat purposes.
// The value of the 'h' descriptor is not used.
if (result.hasDensity() || result.hasHeight())
return false;
int resourceHeight = descriptor.toInt(isValid);
if (!isValid || resourceHeight <= 0)
return false;
result.setResourceHeight(resourceHeight);
#else
return false;
#endif
}
}
return true;
}
static bool parseDescriptors(const CharType* attribute, Vector<DescriptorToken>& descriptors, DescriptorParsingResult& result, Document* document)
{
for (DescriptorToken& descriptor : descriptors) {
if (descriptor.length == 0)
continue;
CharType c = attribute[descriptor.lastIndex()];
bool isValid = false;
if (c == 'w') {
if (result.hasDensity() || result.hasWidth()) {
srcsetError(document, "it has multiple 'w' descriptors or a mix of 'x' and 'w' descriptors.");
return false;
}
int resourceWidth = descriptor.toInt(attribute, isValid);
if (!isValid || resourceWidth <= 0) {
srcsetError(document, "its 'w' descriptor is invalid.");
return false;
}
result.setResourceWidth(resourceWidth);
} else if (c == 'h') {
// This is here only for future compat purposes.
// The value of the 'h' descriptor is not used.
if (result.hasDensity() || result.hasHeight()) {
srcsetError(document, "it has multiple 'h' descriptors or a mix of 'x' and 'h' descriptors.");
return false;
}
int resourceHeight = descriptor.toInt(attribute, isValid);
if (!isValid || resourceHeight <= 0) {
srcsetError(document, "its 'h' descriptor is invalid.");
return false;
}
result.setResourceHeight(resourceHeight);
} else if (c == 'x') {
if (result.hasDensity() || result.hasHeight() || result.hasWidth()) {
srcsetError(document, "it has multiple 'x' descriptors or a mix of 'x' and 'w'/'h' descriptors.");
return false;
}
float density = descriptor.toFloat(attribute, isValid);
if (!isValid || density < 0) {
srcsetError(document, "its 'x' descriptor is invalid.");
return false;
}
result.setDensity(density);
} else {
srcsetError(document, "it has an unknown descriptor.");
return false;
}
}
bool res = !result.hasHeight() || result.hasWidth();
if (!res)
srcsetError(document, "it has an 'h' descriptor and no 'w' descriptor.");
return res;
}