internal bool ParseMediaQuery(bool aInAtRule,
ref nsMediaQuery aQuery,
ref bool aHitStop)
{
aQuery = null;
aHitStop = false;
// "If the comma-separated list is the empty list it is assumed to
// specify the media query 'all'." (css3-mediaqueries, section
// "Media Queries")
if (!GetToken(true)) {
aHitStop = true;
// expected termination by EOF
if (!aInAtRule)
return true;
// unexpected termination by EOF
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEGatherMediaEOF"); };
return true;
}
if (nsCSSTokenType.Symbol == mToken.mType && aInAtRule &&
(mToken.mSymbol == ';' || mToken.mSymbol == '{' || mToken.mSymbol == '}' )) {
aHitStop = true;
UngetToken();
return true;
}
UngetToken();
nsMediaQuery query = new nsMediaQuery();
aQuery = query;
if (ExpectSymbol('(', true)) {
// we got an expression without a media type
UngetToken(); // so ParseMediaQueryExpression can handle it
query.SetType(nsGkAtoms.all);
query.SetTypeOmitted();
// Just parse the first expression here.
if (!ParseMediaQueryExpression(query)) {
mReporter.OutputError();
query.SetHadUnknownExpression();
}
} else {
string mediaType;
bool gotNotOrOnly = false;
for (;;) {
if (!GetToken(true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEGatherMediaEOF"); };
return false;
}
if (nsCSSTokenType.Ident != mToken.mType) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEGatherMediaNotIdent", mToken); };
UngetToken();
return false;
}
// case insensitive from CSS - must be lower cased
mToken.mIdentStr = mToken.mIdentStr.ToLower();
mediaType = String.Intern(mToken.mIdentStr);
if (mediaType == null) {
Debug.Fail("String.Intern failed - out of memory?");
}
if (gotNotOrOnly ||
(mediaType != nsGkAtoms._not && mediaType != nsGkAtoms.only))
break;
gotNotOrOnly = true;
if (mediaType == nsGkAtoms._not)
query.SetNegated();
else
query.SetHasOnly();
}
query.SetType(mediaType);
}
for (;;) {
if (!GetToken(true)) {
aHitStop = true;
// expected termination by EOF
if (!aInAtRule)
break;
// unexpected termination by EOF
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEGatherMediaEOF"); };
break;
}
if (nsCSSTokenType.Symbol == mToken.mType && aInAtRule &&
(mToken.mSymbol == ';' || mToken.mSymbol == '{' || mToken.mSymbol == '}')) {
aHitStop = true;
UngetToken();
break;
}
if (nsCSSTokenType.Symbol == mToken.mType && mToken.mSymbol == ',') {
// Done with the expressions for this query
break;
}
if (nsCSSTokenType.Ident != mToken.mType ||
!mToken.mIdentStr.LowerCaseEqualsLiteral("and")) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEGatherMediaNotComma", mToken); };
UngetToken();
return false;
}
if (!ParseMediaQueryExpression(query)) {
mReporter.OutputError();
query.SetHadUnknownExpression();
}
}
return true;
}
