bool LessParser::parseAtRuleOrVariable (LessStylesheet &stylesheet) {
Token token;
TokenList value, rule;
AtRule* atrule = NULL;
if (tokenizer->getTokenType() != Token::ATKEYWORD)
return false;
token = tokenizer->getToken();
tokenizer->readNextToken();
CssParser::skipWhitespace();
#ifdef WITH_LIBGLOG
VLOG(2) << "Parse: keyword: " << token;
#endif
if (parseVariable(value)) {
#ifdef WITH_LIBGLOG
VLOG(2) << "Parse: variable";
#endif
stylesheet.putVariable(token, value);
} else {
if (token == "@media") {
parseLessMediaQuery(token, stylesheet);
return true;
}
while(parseAny(rule)) {};
if (!parseBlock(rule)) {
if (tokenizer->getTokenType() != Token::DELIMITER) {
throw new ParseException(tokenizer->getToken(),
"delimiter (';') at end of @-rule");
}
tokenizer->readNextToken();
skipWhitespace();
}
// parse import
if (token == "@import" && rule.size() > 0) {
if (parseImportStatement(rule, stylesheet))
return true;
}
atrule = stylesheet.createLessAtRule(token);
atrule->setReference(reference);
atrule->setRule(rule);
}
return true;
}
bool LessParser::parseRuleset (LessStylesheet &stylesheet,
Selector &selector,
LessRuleset* parent) {
LessRuleset* ruleset;
if (tokenizer->getTokenType() != Token::BRACKET_OPEN)
return false;
tokenizer->readNextToken();
skipWhitespace();
#ifdef WITH_LIBGLOG
VLOG(2) << "Parse: Ruleset";
#endif
// Create the ruleset and parse ruleset statements.
if (parent == NULL)
ruleset = stylesheet.createLessRuleset();
else
ruleset = parent->createNestedRule();
ruleset->setReference(reference);
ruleset->setSelector(selector);
parseRulesetStatements(stylesheet, *ruleset);
if (tokenizer->getTokenType() != Token::BRACKET_CLOSED) {
throw new ParseException(tokenizer->getToken(),
"end of declaration block ('}')");
}
tokenizer->readNextToken();
skipWhitespace();
return true;
}
void writeOutput (ostream &out, LessStylesheet &stylesheet, bool format) {
Stylesheet css;
ProcessingContext context;
CssWriter *w1;
w1 = format ? new CssPrettyWriter(out) : new CssWriter(out);
try{
stylesheet.process(css, context);
} catch(ParseException* e) {
#ifdef WITH_LIBGLOG
LOG(ERROR) << e->getSource() << ": Line " << e->getLineNumber() << ", Column " <<
e->getColumn() << " Parse Error: " << e->what();
#else
cerr << e->getSource() << ": Line " << e->getLineNumber() << ", Column " <<
e->getColumn() << " Parse Error: " << e->what();
#endif
return;
} catch(exception* e) {
#ifdef WITH_LIBGLOG
LOG(ERROR) << "Error: " << e->what();
#else
cerr << "Error: " << e->what();
#endif
return;
}
css.write(*w1);
out << endl;
delete w1;
}
bool LessParser::parseStatement(Stylesheet &stylesheet) {
Selector selector;
Mixin* mixin;
CssComment* comment;
LessStylesheet* ls = (LessStylesheet*)&stylesheet;
if (tokenizer->getTokenType() == Token::COMMENT) {
comment = ls->createComment();
comment->setComment(tokenizer->getToken());
tokenizer->readNextToken();
skipWhitespace();
return true;
} else if (parseSelector(selector) && !selector.empty()) {
#ifdef WITH_LIBGLOG
VLOG(2) << "Parse: Selector: " << selector.toString();
#endif
if (parseRuleset(*ls, selector))
return true;
// Parameter mixin in the root. Inserts nested rules but no
// declarations.
mixin = ls->createMixin();
mixin->setReference(reference);
if (mixin->parse(selector)) {
if (tokenizer->getTokenType() == Token::DELIMITER) {
tokenizer->readNextToken();
skipWhitespace();
}
return true;
} else {
ls->deleteMixin(*mixin);
throw new ParseException(tokenizer->getToken(),
"a declaration block ('{...}') following selector");
}
} else {
return parseAtRuleOrVariable(*ls);
}
}
void LessParser::parseLessMediaQuery(Token &mediatoken,
LessStylesheet &stylesheet) {
LessMediaQuery* query = stylesheet.createLessMediaQuery();
query->setReference(reference);
query->getSelector()->push_back(mediatoken);
query->getSelector()->push_back(Token::BUILTIN_SPACE);
CssParser::skipWhitespace();
while (parseAny(*query->getSelector()) ||
tokenizer->getTokenType() == Token::ATKEYWORD) {
if (tokenizer->getTokenType() == Token::ATKEYWORD) {
query->getSelector()->push_back(tokenizer->getToken());
tokenizer->readNextToken();
parseWhitespace(*query->getSelector());
}
}
#ifdef WITH_LIBGLOG
VLOG(2) << "Media query: " << query->getSelector()->toString();
#endif
if (tokenizer->getTokenType() != Token::BRACKET_OPEN) {
throw new ParseException(tokenizer->getToken(),
"{");
}
tokenizer->readNextToken();
skipWhitespace();
while (parseStatement(*query)) {
skipWhitespace();
}
if (tokenizer->getTokenType() != Token::BRACKET_CLOSED) {
throw new ParseException(tokenizer->getToken(),
"end of media query block ('}')");
}
tokenizer->readNextToken();
skipWhitespace();
}
bool LessParser::parseAtRuleOrVariable (LessStylesheet &stylesheet) {
string keyword, import;
TokenList value, rule;
AtRule* atrule = NULL;
if (tokenizer->getTokenType() != Token::ATKEYWORD)
return false;
keyword = tokenizer->getToken();
tokenizer->readNextToken();
skipWhitespace();
#ifdef WITH_LIBGLOG
VLOG(2) << "Parse: keyword: " << keyword;
#endif
if (parseVariable(value)) {
#ifdef WITH_LIBGLOG
VLOG(2) << "Parse: variable";
#endif
stylesheet.putVariable(keyword, value);
} else {
if (keyword == "@media") {
parseLessMediaQuery(stylesheet);
return true;
}
while(parseAny(rule)) {};
if (!parseBlock(rule)) {
if (tokenizer->getTokenType() != Token::DELIMITER) {
throw new ParseException(tokenizer->getToken(),
"delimiter (';') at end of @-rule",
tokenizer->getLineNumber(),
tokenizer->getColumn(),
tokenizer->getSource());
}
tokenizer->readNextToken();
skipWhitespace();
}
// parse import
if (keyword == "@import") {
if (rule.size() != 1 ||
rule.front().type != Token::STRING)
throw new ParseException(rule.toString(), "A string with the \
file path",
tokenizer->getLineNumber(),
tokenizer->getColumn(),
tokenizer->getSource());
import = rule.front();
#ifdef WITH_LIBGLOG
VLOG(2) << "Import filename: " << import;
#endif
if (import.size() < 5 ||
import.substr(import.size() - 5, 4) != ".css") {
if (import.size() < 6 || import.substr(import.size() - 6, 5) != ".less")
import.insert(import.size() - 1, ".less");
importFile(import.substr(1, import.size() - 2), stylesheet);
return true;
}
}
atrule = stylesheet.createAtRule(keyword);
atrule->setRule(rule);
}
return true;
}
