void DOMTokenList::setValue(const String& value)
{
// Clear tokens but not capacity.
m_tokens.shrink(0);
HashSet<AtomicString> addedTokens;
// https://dom.spec.whatwg.org/#ordered%20sets
for (unsigned start = 0; ; ) {
while (start < value.length() && isHTMLSpace(value[start]))
++start;
if (start >= value.length())
break;
unsigned end = start + 1;
while (end < value.length() && !isHTMLSpace(value[end]))
++end;
AtomicString token = value.substring(start, end - start);
if (!addedTokens.contains(token)) {
m_tokens.append(token);
addedTokens.add(token);
}
start = end + 1;
}
m_tokens.shrinkToFit();
m_cachedValue = nullAtom;
}
SandboxFlags SecurityContext::parseSandboxPolicy(const String& policy, String& invalidTokensErrorMessage)
{
// http://www.w3.org/TR/html5/the-iframe-element.html#attr-iframe-sandbox
// Parse the unordered set of unique space-separated tokens.
SandboxFlags flags = SandboxAll;
const UChar* characters = policy.characters();
unsigned length = policy.length();
unsigned start = 0;
unsigned numberOfTokenErrors = 0;
StringBuilder tokenErrors;
while (true) {
while (start < length && isHTMLSpace(characters[start]))
++start;
if (start >= length)
break;
unsigned end = start + 1;
while (end < length && !isHTMLSpace(characters[end]))
++end;
// Turn off the corresponding sandbox flag if it's set as "allowed".
String sandboxToken = policy.substring(start, end - start);
if (equalIgnoringCase(sandboxToken, "allow-same-origin"))
flags &= ~SandboxOrigin;
else if (equalIgnoringCase(sandboxToken, "allow-forms"))
flags &= ~SandboxForms;
else if (equalIgnoringCase(sandboxToken, "allow-scripts")) {
flags &= ~SandboxScripts;
flags &= ~SandboxAutomaticFeatures;
} else if (equalIgnoringCase(sandboxToken, "allow-top-navigation"))
flags &= ~SandboxTopNavigation;
else if (equalIgnoringCase(sandboxToken, "allow-popups"))
flags &= ~SandboxPopups;
else if (equalIgnoringCase(sandboxToken, "allow-pointer-lock"))
flags &= ~SandboxPointerLock;
else {
if (numberOfTokenErrors)
tokenErrors.appendLiteral(", '");
else
tokenErrors.append('\'');
tokenErrors.append(sandboxToken);
tokenErrors.append('\'');
numberOfTokenErrors++;
}
start = end + 1;
}
if (numberOfTokenErrors) {
if (numberOfTokenErrors > 1)
tokenErrors.appendLiteral(" are invalid sandbox flags.");
else
tokenErrors.appendLiteral(" is an invalid sandbox flag.");
invalidTokensErrorMessage = tokenErrors.toString();
}
return flags;
}
static void tokenizeDescriptors(const CharType* attributeStart,
const CharType*& position,
const CharType* attributeEnd,
Vector<DescriptorToken>& descriptors)
{
DescriptorTokenizerState state = Start;
const CharType* descriptorsStart = position;
const CharType* currentDescriptorStart = descriptorsStart;
while (true) {
switch (state) {
case Start:
if (isEOF(position, attributeEnd)) {
appendDescriptorAndReset(attributeStart, currentDescriptorStart, attributeEnd, descriptors);
return;
}
if (isComma(*position)) {
appendDescriptorAndReset(attributeStart, currentDescriptorStart, position, descriptors);
++position;
return;
}
if (isHTMLSpace(*position)) {
appendDescriptorAndReset(attributeStart, currentDescriptorStart, position, descriptors);
currentDescriptorStart = position + 1;
state = AfterToken;
} else if (*position == '(') {
appendCharacter(currentDescriptorStart, position);
state = InParenthesis;
} else {
appendCharacter(currentDescriptorStart, position);
}
break;
case InParenthesis:
if (isEOF(position, attributeEnd)) {
appendDescriptorAndReset(attributeStart, currentDescriptorStart, attributeEnd, descriptors);
return;
}
if (*position == ')') {
appendCharacter(currentDescriptorStart, position);
state = Start;
} else {
appendCharacter(currentDescriptorStart, position);
}
break;
case AfterToken:
if (isEOF(position, attributeEnd))
return;
if (!isHTMLSpace(*position)) {
state = Start;
currentDescriptorStart = position;
--position;
}
break;
}
++position;
}
}
void CSSTokenizerInputStream::advanceUntilNonWhitespace() {
// Using HTML space here rather than CSS space since we don't do preprocessing
if (m_string->is8Bit()) {
const LChar* characters = m_string->characters8();
while (m_offset < m_stringLength && isHTMLSpace(characters[m_offset]))
++m_offset;
} else {
const UChar* characters = m_string->characters16();
while (m_offset < m_stringLength && isHTMLSpace(characters[m_offset]))
++m_offset;
}
}
void SpaceSplitStringData::createVector()
{
ASSERT(!m_createdVector);
ASSERT(m_vector.isEmpty());
if (m_shouldFoldCase && hasNonASCIIOrUpper(m_string))
m_string = m_string.foldCase();
const UChar* characters = m_string.characters();
unsigned length = m_string.length();
unsigned start = 0;
while (true) {
while (start < length && isHTMLSpace(characters[start]))
++start;
if (start >= length)
break;
unsigned end = start + 1;
while (end < length && isNotHTMLSpace(characters[end]))
++end;
m_vector.append(AtomicString(characters + start, end - start));
start = end + 1;
}
m_string = String();
m_createdVector = true;
}
String DOMTokenList::removeTokens(const AtomicString& input, const Vector<String>& tokens)
{
// Algorithm defined at http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#remove-a-token-from-a-string
// New spec is at http://dom.spec.whatwg.org/#remove-a-token-from-a-string
unsigned inputLength = input.length();
StringBuilder output; // 3
output.reserveCapacity(inputLength);
unsigned position = 0; // 4
// Step 5
while (position < inputLength) {
if (isHTMLSpace(input[position])) { // 6
output.append(input[position++]); // 6.1, 6.2
continue; // 6.3
}
// Step 7
StringBuilder tokenBuilder;
while (position < inputLength && isNotHTMLSpace(input[position]))
tokenBuilder.append(input[position++]);
// Step 8
String token = tokenBuilder.toString();
if (tokens.contains(token)) {
// Step 8.1
while (position < inputLength && isHTMLSpace(input[position]))
++position;
// Step 8.2
size_t j = output.length();
while (j > 0 && isHTMLSpace(output[j - 1]))
--j;
output.resize(j);
// Step 8.3
if (position < inputLength && !output.isEmpty())
output.append(' ');
} else {
output.append(token); // Step 9
}
}
return output.toString();
}
void CSSTokenizer::consumeSingleWhitespaceIfNext()
{
// We check for \r\n and HTML spaces since we don't do preprocessing
UChar c = m_input.nextInputChar();
if (c == '\r' && m_input.peek(1) == '\n')
consume(2);
else if (isHTMLSpace(c))
consume();
}
SandboxFlags SecurityContext::parseSandboxPolicy(const String& policy)
{
// http://www.w3.org/TR/html5/the-iframe-element.html#attr-iframe-sandbox
// Parse the unordered set of unique space-separated tokens.
SandboxFlags flags = SandboxAll;
const UChar* characters = policy.characters();
unsigned length = policy.length();
unsigned start = 0;
while (true) {
while (start < length && isHTMLSpace(characters[start]))
++start;
if (start >= length)
break;
unsigned end = start + 1;
while (end < length && !isHTMLSpace(characters[end]))
++end;
// Turn off the corresponding sandbox flag if it's set as "allowed".
String sandboxToken = policy.substring(start, end - start);
if (equalIgnoringCase(sandboxToken, "allow-same-origin"))
flags &= ~SandboxOrigin;
else if (equalIgnoringCase(sandboxToken, "allow-forms"))
flags &= ~SandboxForms;
else if (equalIgnoringCase(sandboxToken, "allow-scripts")) {
flags &= ~SandboxScripts;
flags &= ~SandboxAutomaticFeatures;
} else if (equalIgnoringCase(sandboxToken, "allow-top-navigation"))
flags &= ~SandboxTopNavigation;
else if (equalIgnoringCase(sandboxToken, "allow-popups"))
flags &= ~SandboxPopups;
else if (equalIgnoringCase(sandboxToken, "allow-pointer-lock"))
flags &= ~SandboxPointerLock;
start = end + 1;
}
return flags;
}
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers
bool parseHTMLInteger(const String& input, int& value)
{
// Step 1
// Step 2
const UChar* position = input.characters();
const UChar* end = position + input.length();
// Step 3
int sign = 1;
// Step 4
while (position < end) {
if (!isHTMLSpace(*position))
break;
++position;
}
// Step 5
if (position == end)
return false;
ASSERT(position < end);
// Step 6
if (*position == '-') {
sign = -1;
++position;
} else if (*position == '+')
++position;
if (position == end)
return false;
ASSERT(position < end);
// Step 7
if (!isASCIIDigit(*position))
return false;
// Step 8
StringBuilder digits;
while (position < end) {
if (!isASCIIDigit(*position))
break;
digits.append(*position++);
}
// Step 9
bool ok;
value = sign * charactersToIntStrict(digits.characters(), digits.length(), &ok);
return ok;
}
static bool parseHTMLIntegerInternal(const CharacterType* position, const CharacterType* end, int& value)
{
// Step 3
int sign = 1;
// Step 4
while (position < end) {
if (!isHTMLSpace(*position))
break;
++position;
}
// Step 5
if (position == end)
return false;
ASSERT(position < end);
// Step 6
if (*position == '-') {
sign = -1;
++position;
} else if (*position == '+')
++position;
if (position == end)
return false;
ASSERT(position < end);
// Step 7
if (!isASCIIDigit(*position))
return false;
// Step 8
StringBuilder digits;
while (position < end) {
if (!isASCIIDigit(*position))
break;
digits.append(*position++);
}
// Step 9
bool ok;
if (digits.is8Bit())
value = sign * charactersToIntStrict(digits.characters8(), digits.length(), &ok);
else
value = sign * charactersToIntStrict(digits.characters16(), digits.length(), &ok);
return ok;
}
static inline void tokenizeSpaceSplitString(TokenProcessor& tokenProcessor, const CharacterType* characters, unsigned length)
{
for (unsigned start = 0; ; ) {
while (start < length && isHTMLSpace(characters[start]))
++start;
if (start >= length)
break;
unsigned end = start + 1;
while (end < length && isNotHTMLSpace(characters[end]))
++end;
if (!tokenProcessor.processToken(characters + start, end - start))
return;
start = end + 1;
}
}
// http://dev.w3.org/csswg/css-syntax/#consume-url-token
CSSParserToken CSSTokenizer::consumeUrlToken()
{
consumeUntilNonWhitespace();
// URL tokens without escapes get handled without allocations
for (unsigned size = 0; ; size++) {
UChar cc = m_input.peekWithoutReplacement(size);
if (cc == ')') {
unsigned startOffset = m_input.offset();
m_input.advance(size + 1);
return CSSParserToken(UrlToken, m_input.rangeAsCSSParserString(startOffset, size));
}
if (cc <= ' ' || cc == '\\' || cc == '"' || cc == '\'' || cc == '(' || cc == '\x7f')
break;
}
StringBuilder result;
while (true) {
UChar cc = consume();
if (cc == ')' || cc == kEndOfFileMarker)
return CSSParserToken(UrlToken, registerString(result.toString()));
if (isHTMLSpace(cc)) {
consumeUntilNonWhitespace();
if (consumeIfNext(')') || m_input.nextInputChar() == kEndOfFileMarker)
return CSSParserToken(UrlToken, registerString(result.toString()));
break;
}
if (cc == '"' || cc == '\'' || cc == '(' || isNonPrintableCodePoint(cc))
break;
if (cc == '\\') {
if (twoCharsAreValidEscape(cc, m_input.nextInputChar())) {
result.append(consumeEscape());
continue;
}
break;
}
result.append(cc);
}
consumeBadUrlRemnants();
return CSSParserToken(BadUrlToken);
}
bool DOMTokenList::validateToken(const AtomicString& token, ExceptionCode& ec)
{
if (token.isEmpty()) {
ec = SYNTAX_ERR;
return false;
}
unsigned length = token.length();
for (unsigned i = 0; i < length; ++i) {
if (isHTMLSpace(token[i])) {
ec = INVALID_CHARACTER_ERR;
return false;
}
}
return true;
}
bool DOMTokenList::validateToken(const AtomicString& token, ExceptionState& es)
{
if (token.isEmpty()) {
es.throwDOMException(SyntaxError);
return false;
}
unsigned length = token.length();
for (unsigned i = 0; i < length; ++i) {
if (isHTMLSpace(token[i])) {
es.throwDOMException(InvalidCharacterError);
return false;
}
}
return true;
}
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers
bool parseHTMLNonNegativeInteger(const String& input, unsigned int& value)
{
// Step 1
// Step 2
const UChar* position = input.characters();
const UChar* end = position + input.length();
// Step 3
while (position < end) {
if (!isHTMLSpace(*position))
break;
++position;
}
// Step 4
if (position == end)
return false;
ASSERT(position < end);
// Step 5
if (*position == '+')
++position;
// Step 6
if (position == end)
return false;
ASSERT(position < end);
// Step 7
if (!isASCIIDigit(*position))
return false;
// Step 8
StringBuilder digits;
while (position < end) {
if (!isASCIIDigit(*position))
break;
digits.append(*position++);
}
// Step 9
bool ok;
value = charactersToUIntStrict(digits.characters(), digits.length(), &ok);
return ok;
}
static bool parseHTMLNonNegativeIntegerInternal(const CharacterType* position, const CharacterType* end, unsigned& value)
{
// Step 3
while (position < end) {
if (!isHTMLSpace(*position))
break;
++position;
}
// Step 4
if (position == end)
return false;
ASSERT_WITH_SECURITY_IMPLICATION(position < end);
// Step 5
if (*position == '+')
++position;
// Step 6
if (position == end)
return false;
ASSERT_WITH_SECURITY_IMPLICATION(position < end);
// Step 7
if (!isASCIIDigit(*position))
return false;
// Step 8
StringBuilder digits;
while (position < end) {
if (!isASCIIDigit(*position))
break;
digits.append(*position++);
}
// Step 9
bool ok;
if (digits.is8Bit())
value = charactersToUIntStrict(digits.characters8(), digits.length(), &ok);
else
value = charactersToUIntStrict(digits.characters16(), digits.length(), &ok);
return ok;
}
String DOMTokenList::addTokens(const AtomicString& input, const Vector<String>& tokens)
{
bool needsSpace = false;
StringBuilder builder;
if (!input.isEmpty()) {
builder.append(input);
needsSpace = !isHTMLSpace(input[input.length() - 1]);
}
for (size_t i = 0; i < tokens.size(); ++i) {
if (needsSpace)
builder.append(' ');
builder.append(tokens[i]);
needsSpace = true;
}
return builder.toString();
}
// http://dev.w3.org/csswg/css-syntax/#consume-url-token
CSSParserToken CSSTokenizer::consumeUrlToken()
{
consumeUntilNonWhitespace();
StringBuilder result;
while (true) {
UChar cc = consume();
if (cc == ')' || cc == kEndOfFileMarker) {
// The "reconsume" here deviates from the spec, but is required to avoid consuming past the EOF
if (cc == kEndOfFileMarker)
reconsume(cc);
return CSSParserToken(UrlToken, result.toString());
}
if (isHTMLSpace(cc)) {
consumeUntilNonWhitespace();
if (consumeIfNext(')') || m_input.nextInputChar() == kEndOfFileMarker)
return CSSParserToken(UrlToken, result.toString());
break;
}
if (cc == '"' || cc == '\'' || cc == '(' || isNonPrintableCodePoint(cc))
break;
if (cc == '\\') {
if (twoCharsAreValidEscape(cc, m_input.nextInputChar())) {
result.append(consumeEscape());
continue;
}
break;
}
result.append(cc);
}
consumeBadUrlRemnants();
return CSSParserToken(BadUrlToken);
}
static String parseCSSStringOrURL(const UChar* characters, size_t length)
{
size_t offset = 0;
size_t reducedLength = length;
while (reducedLength && isHTMLSpace(characters[offset])) {
++offset;
--reducedLength;
}
while (reducedLength && isHTMLSpace(characters[offset + reducedLength - 1]))
--reducedLength;
if (reducedLength >= 5
&& (characters[offset] == 'u' || characters[offset] == 'U')
&& (characters[offset + 1] == 'r' || characters[offset + 1] == 'R')
&& (characters[offset + 2] == 'l' || characters[offset + 2] == 'L')
&& characters[offset + 3] == '('
&& characters[offset + reducedLength - 1] == ')') {
offset += 4;
reducedLength -= 5;
}
while (reducedLength && isHTMLSpace(characters[offset])) {
++offset;
--reducedLength;
}
while (reducedLength && isHTMLSpace(characters[offset + reducedLength - 1]))
--reducedLength;
if (reducedLength < 2 || characters[offset] != characters[offset + reducedLength - 1] || !(characters[offset] == '\'' || characters[offset] == '"'))
return String();
offset++;
reducedLength -= 2;
while (reducedLength && isHTMLSpace(characters[offset])) {
++offset;
--reducedLength;
}
while (reducedLength && isHTMLSpace(characters[offset + reducedLength - 1]))
--reducedLength;
return String(characters + offset, reducedLength);
}
inline void CSSPreloadScanner::tokenize(UChar c)
{
// We are just interested in @import rules, no need for real tokenization here
// Searching for other types of resources is probably low payoff.
switch (m_state) {
case Initial:
if (isHTMLSpace(c))
break;
if (c == '@')
m_state = RuleStart;
else if (c == '/')
m_state = MaybeComment;
else
m_state = DoneParsingImportRules;
break;
case MaybeComment:
if (c == '*')
m_state = Comment;
else
m_state = Initial;
break;
case Comment:
if (c == '*')
m_state = MaybeCommentEnd;
break;
case MaybeCommentEnd:
if (c == '*')
break;
if (c == '/')
m_state = Initial;
else
m_state = Comment;
break;
case RuleStart:
if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) {
m_rule.clear();
m_ruleValue.clear();
m_rule.append(c);
m_state = Rule;
} else
m_state = Initial;
break;
case Rule:
if (isHTMLSpace(c))
m_state = AfterRule;
else if (c == ';')
m_state = Initial;
else
m_rule.append(c);
break;
case AfterRule:
if (isHTMLSpace(c))
break;
if (c == ';')
m_state = Initial;
else if (c == '{')
m_state = DoneParsingImportRules;
else {
m_state = RuleValue;
m_ruleValue.append(c);
}
break;
case RuleValue:
if (isHTMLSpace(c))
m_state = AfterRuleValue;
else if (c == ';')
emitRule();
else
m_ruleValue.append(c);
break;
case AfterRuleValue:
if (isHTMLSpace(c))
break;
if (c == ';')
emitRule();
else if (c == '{')
m_state = DoneParsingImportRules;
else {
// FIXME: media rules
m_state = Initial;
}
break;
case DoneParsingImportRules:
ASSERT_NOT_REACHED();
break;
}
}
// See the specifications for more details about the algorithm to follow.
// http://www.w3.org/TR/2013/WD-html-srcset-20130228/#processing-the-image-candidates.
static void parseImagesWithScaleFromSrcsetAttribute(const String& srcsetAttribute, ImageCandidates& imageCandidates)
{
ASSERT(imageCandidates.isEmpty());
size_t imageCandidateStart = 0;
unsigned srcsetAttributeLength = srcsetAttribute.length();
while (imageCandidateStart < srcsetAttributeLength) {
float imageScaleFactor = 1;
size_t separator;
// 4. Splitting loop: Skip whitespace.
size_t imageURLStart = srcsetAttribute.find(isNotHTMLSpace, imageCandidateStart);
if (imageURLStart == notFound)
break;
// If The current candidate is either totally empty or only contains space, skipping.
if (srcsetAttribute[imageURLStart] == ',') {
imageCandidateStart = imageURLStart + 1;
continue;
}
// 5. Collect a sequence of characters that are not space characters, and let that be url.
size_t imageURLEnd = srcsetAttribute.find(isHTMLSpace, imageURLStart + 1);
if (imageURLEnd == notFound) {
imageURLEnd = srcsetAttributeLength;
separator = srcsetAttributeLength;
} else if (srcsetAttribute[imageURLEnd - 1] == ',') {
--imageURLEnd;
separator = imageURLEnd;
} else {
// 7. Collect a sequence of characters that are not "," (U+002C) characters, and let that be descriptors.
size_t imageScaleStart = srcsetAttribute.find(isNotHTMLSpace, imageURLEnd + 1);
if (imageScaleStart == notFound)
separator = srcsetAttributeLength;
else if (srcsetAttribute[imageScaleStart] == ',')
separator = imageScaleStart;
else {
// This part differs from the spec as the current implementation only supports pixel density descriptors for now.
size_t imageScaleEnd = srcsetAttribute.find(isHTMLSpaceOrComma, imageScaleStart + 1);
imageScaleEnd = (imageScaleEnd == notFound) ? srcsetAttributeLength : imageScaleEnd;
size_t commaPosition = imageScaleEnd;
// Make sure there are no other descriptors.
while ((commaPosition < srcsetAttributeLength - 1) && isHTMLSpace(srcsetAttribute[commaPosition]))
++commaPosition;
// If the first not html space character after the scale modifier is not a comma,
// the current candidate is an invalid input.
if ((commaPosition < srcsetAttributeLength - 1) && srcsetAttribute[commaPosition] != ',') {
// Find the nearest comma and skip the input.
commaPosition = srcsetAttribute.find(',', commaPosition + 1);
if (commaPosition == notFound)
break;
imageCandidateStart = commaPosition + 1;
continue;
}
separator = commaPosition;
if (srcsetAttribute[imageScaleEnd - 1] != 'x') {
imageCandidateStart = separator + 1;
continue;
}
bool validScaleFactor = false;
size_t scaleFactorLengthWithoutUnit = imageScaleEnd - imageScaleStart - 1;
imageScaleFactor = charactersToFloat(srcsetAttribute.characters() + imageScaleStart, scaleFactorLengthWithoutUnit, &validScaleFactor);
if (!validScaleFactor) {
imageCandidateStart = separator + 1;
continue;
}
}
}
ImageWithScale image;
image.imageURL = String(srcsetAttribute.characters() + imageURLStart, imageURLEnd - imageURLStart);
image.scaleFactor = imageScaleFactor;
imageCandidates.append(image);
// 11. Return to the step labeled splitting loop.
imageCandidateStart = separator + 1;
}
}
static inline bool isHTMLSpaceOrComma(UChar character)
{
return isHTMLSpace(character) || character == ',';
}
void InspectorStyleTextEditor::insertProperty(unsigned index, const String& propertyText, unsigned styleBodyLength)
{
long propertyStart = 0;
bool insertLast = true;
if (index < m_allProperties->size()) {
const InspectorStyleProperty& property = m_allProperties->at(index);
if (property.hasSource) {
propertyStart = property.sourceData.range.start;
// If inserting before a disabled property, it should be shifted, too.
insertLast = false;
}
}
bool insertFirstInSource = true;
for (unsigned i = 0, size = m_allProperties->size(); i < index && i < size; ++i) {
const InspectorStyleProperty& property = m_allProperties->at(i);
if (property.hasSource && !property.disabled) {
insertFirstInSource = false;
break;
}
}
bool insertLastInSource = true;
for (unsigned i = index, size = m_allProperties->size(); i < size; ++i) {
const InspectorStyleProperty& property = m_allProperties->at(i);
if (property.hasSource && !property.disabled) {
insertLastInSource = false;
break;
}
}
String textToSet = propertyText;
int formattingPrependOffset = 0;
if (insertLast && !insertFirstInSource) {
propertyStart = styleBodyLength;
if (propertyStart && textToSet.length()) {
const UChar* characters = m_styleText.characters();
long curPos = propertyStart - 1; // The last position of style declaration, since propertyStart points past one.
while (curPos && isHTMLSpace(characters[curPos]))
--curPos;
if (curPos && characters[curPos] != ';') {
// Prepend a ";" to the property text if appending to a style declaration where
// the last property has no trailing ";".
textToSet.insert(";", 0);
formattingPrependOffset = 1;
}
}
}
const String& formatLineFeed = m_format.first;
const String& formatPropertyPrefix = m_format.second;
if (insertLastInSource) {
long formatPropertyPrefixLength = formatPropertyPrefix.length();
if (!formattingPrependOffset && (propertyStart < formatPropertyPrefixLength || m_styleText.substring(propertyStart - formatPropertyPrefixLength, formatPropertyPrefixLength) != formatPropertyPrefix)) {
textToSet.insert(formatPropertyPrefix, formattingPrependOffset);
if (!propertyStart || !isHTMLLineBreak(m_styleText[propertyStart - 1]))
textToSet.insert(formatLineFeed, formattingPrependOffset);
}
if (!isHTMLLineBreak(m_styleText[propertyStart]))
textToSet.append(formatLineFeed);
} else {
String fullPrefix = formatLineFeed + formatPropertyPrefix;
long fullPrefixLength = fullPrefix.length();
textToSet.append(fullPrefix);
if (insertFirstInSource && (propertyStart < fullPrefixLength || m_styleText.substring(propertyStart - fullPrefixLength, fullPrefixLength) != fullPrefix))
textToSet.insert(fullPrefix, formattingPrependOffset);
}
m_styleText.insert(textToSet, propertyStart);
// Recompute disabled property ranges after an inserted property.
long propertyLengthDelta = textToSet.length();
shiftDisabledProperties(disabledIndexByOrdinal(index, true), propertyLengthDelta);
}
