/** Parses the next rule set, which is a selector followed by a declaration block. */
private void parseRuleSet() throws IOException {
if (parseSelectors()) {
callback.startRule();
parseDeclarationBlock();
callback.endRule();
}
}
// identifier+: identifier* ;|}
private int parseDeclaration() throws IOException {
int token;
if ((token = parseIdentifiers(':', false)) != IDENTIFIER) {
return token;
}
// Make the property name to lowercase
for (int counter = unitBuffer.length() - 1; counter >= 0; counter--) {
unitBuffer.setCharAt(counter, Character.toLowerCase(unitBuffer.charAt(counter)));
}
callback.handleProperty(unitBuffer.toString());
token = parseIdentifiers(';', true);
callback.handleValue(unitBuffer.toString());
return token;
}
/** Parses a set of selectors, returning false if the end of the stream is reached. */
private boolean parseSelectors() throws IOException {
// Parse the selectors
int nextToken;
if (tokenBufferLength > 0) {
callback.handleSelector(new String(tokenBuffer, 0, tokenBufferLength));
}
unitBuffer.setLength(0);
for (; ; ) {
while ((nextToken = nextToken((char) 0)) == IDENTIFIER) {
if (tokenBufferLength > 0) {
callback.handleSelector(new String(tokenBuffer, 0, tokenBufferLength));
}
}
switch (nextToken) {
case BRACE_OPEN:
return true;
case BRACKET_OPEN:
case PAREN_OPEN:
parseTillClosed(nextToken);
// Not too sure about this, how we handle this isn't very
// well spec'd.
unitBuffer.setLength(0);
break;
case BRACKET_CLOSE:
case BRACE_CLOSE:
case PAREN_CLOSE:
throw new RuntimeException("Unexpected block close in selector");
case END:
// Prematurely hit end.
return false;
}
}
}
/** Parses an @ rule, stopping at a matching brace pair, or ;. */
private void parseAtRule() throws IOException {
// PENDING: make this more effecient.
boolean done = false;
boolean isImport =
(tokenBufferLength == 7
&& tokenBuffer[0] == '@'
&& tokenBuffer[1] == 'i'
&& tokenBuffer[2] == 'm'
&& tokenBuffer[3] == 'p'
&& tokenBuffer[4] == 'o'
&& tokenBuffer[5] == 'r'
&& tokenBuffer[6] == 't');
unitBuffer.setLength(0);
while (!done) {
int nextToken = nextToken(';');
switch (nextToken) {
case IDENTIFIER:
if (tokenBufferLength > 0 && tokenBuffer[tokenBufferLength - 1] == ';') {
--tokenBufferLength;
done = true;
}
if (tokenBufferLength > 0) {
if (unitBuffer.length() > 0 && readWS) {
unitBuffer.append(' ');
}
unitBuffer.append(tokenBuffer, 0, tokenBufferLength);
}
break;
case BRACE_OPEN:
if (unitBuffer.length() > 0 && readWS) {
unitBuffer.append(' ');
}
unitBuffer.append(charMapping[nextToken]);
parseTillClosed(nextToken);
done = true;
// Skip a tailing ';', not really to spec.
{
int nextChar = readWS();
if (nextChar != -1 && nextChar != ';') {
pushChar(nextChar);
}
}
break;
case BRACKET_OPEN:
case PAREN_OPEN:
unitBuffer.append(charMapping[nextToken]);
parseTillClosed(nextToken);
break;
case BRACKET_CLOSE:
case BRACE_CLOSE:
case PAREN_CLOSE:
throw new RuntimeException("Unexpected close in @ rule");
case END:
done = true;
break;
}
}
if (isImport && !encounteredRuleSet) {
callback.handleImport(unitBuffer.toString());
}
}
