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Issue #2486 - Part 4: Ensure layer statement rule is appended and invalid tokens are restored

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This commit is contained in:
FranklinDM 2024-07-15 08:32:49 +08:00 • committed by roytam1
commit 2fc2056be7
1 changed files with 24 additions and 8 deletions
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32
layout/style/nsCSSParser.cpp
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@ -4947,6 +4947,7 @@ bool
CSSParserImpl::ParseLayerRule(RuleAppendFunc aAppendFunc, void* aProcessData)
{
nsString layerName;
nsTArray<nsString>* nameList = new nsTArray<nsString>();
uint32_t linenum, colnum;
if (!GetNextTokenLocation(true, &linenum, &colnum)) {
@ -4960,8 +4961,8 @@ CSSParserImpl::ParseLayerRule(RuleAppendFunc aAppendFunc, void* aProcessData)
// Parse the layer name or name list if we aren't immediately
// followed by a "{", which indicates an anonymous layer.
bool isStatement = false;
if (tk->mType == eCSSToken_Ident) {
nsTArray<nsString>* nameList = new nsTArray<nsString>();
nameList->AppendElement(tk->mIdent);
bool parsing = true;
@ -4975,27 +4976,29 @@ CSSParserImpl::ParseLayerRule(RuleAppendFunc aAppendFunc, void* aProcessData)
case eCSSToken_Symbol: {
if (',' == tk->mSymbol) {
if (expectIdent) {
return false;
parsing = false;
break;
}
expectIdent = true;
continue;
} else if (';' == tk->mSymbol) {
if (expectIdent) {
return false;
parsing = false;
break;
}
RefPtr<CSSLayerStatementRule> rule =
new CSSLayerStatementRule(*nameList, linenum, colnum);
return true;
isStatement = true;
parsing = false;
break;
} else if ('{' == tk->mSymbol) {
if (expectIdent) {
return false;
parsing = false;
break;
}
uint32_t nameListLength = nameList->Length();
if (nameListLength == 0 || nameListLength > 1) {
return false;
}
layerName.Assign(nameList->ElementAt(0));
UngetToken();
parsing = false;
break;
}
@ -5010,10 +5013,23 @@ CSSParserImpl::ParseLayerRule(RuleAppendFunc aAppendFunc, void* aProcessData)
}
}
}
if (expectIdent) {
UngetToken();
return false;
}
} else if (tk->mType == eCSSToken_Symbol && '{' != tk->mSymbol) {
return false;
}
if (isStatement) {
RefPtr<CSSLayerStatementRule> rule =
new CSSLayerStatementRule(*nameList, linenum, colnum);
(*aAppendFunc)(rule, aProcessData);
return true;
}
UngetToken();
RefPtr<css::GroupRule> rule =
new CSSLayerBlockRule(layerName, linenum, colnum);
return ParseGroupRule(rule, aAppendFunc, aProcessData);