Esempio n. 1
0
  /**
   * With start token required to be an ATKEYWORD, collect at-rule parameters if any, and if the
   * at-rule has a block, invoke those handlers.
   */
  private void handleAtRule(
      CssToken start, CssTokenIterator iter, CssContentHandler doc, CssErrorHandler err)
      throws CssException {

    if (debug) {
      checkArgument(start.type == CssToken.Type.ATKEYWORD);
      checkArgument(iter.index() == iter.list.indexOf(start));
      checkArgument(iter.filter() == FILTER_S_CMNT);
    }

    CssAtRule atRule = new CssAtRule(start.getChars(), start.location);

    CssToken tk;
    try {
      while (true) {
        tk = iter.next();
        if (MATCH_SEMI_OPENBRACE.apply(tk)) {
          // ';' or '{', expected end
          atRule.hasBlock = tk.getChar() == '{';
          break;
        } else {
          CssConstruct param = handleAtRuleParam(tk, iter, doc, err);
          if (param == null) {
            // issue error, forward, then return
            err.error(
                new CssGrammarException(
                    GRAMMAR_UNEXPECTED_TOKEN, iter.last.location, iter.last.chars));
            // skip to atrule closebrace, ignoring any inner blocks
            int stack = 0;
            while (true) {
              CssToken tok = iter.next();
              if (MATCH_SEMI.apply(tok) && stack == 0) {
                return; // a non-block at rule
              } else if (MATCH_OPENBRACE.apply(tok)) {
                stack++;
              } else if (MATCH_CLOSEBRACE.apply(tok)) {
                if (stack == 1) {
                  break;
                }
                stack--;
              }
            }
            return;
          } else {
            atRule.components.add(param);
          }
        }
      }
    } catch (NoSuchElementException nse) {
      // UAs required to close any open constructs on premature EOF
      doc.startAtRule(atRule);
      err.error(
          new CssGrammarException(
              GRAMMAR_PREMATURE_EOF, iter.last.location, "';' " + Messages.get("or") + " '{'"));
      doc.endAtRule(atRule.getName().get());
      throw new PrematureEOFException();
    }

    if (debug) {
      checkArgument(MATCH_SEMI_OPENBRACE.apply(iter.last));
      checkArgument(iter.filter() == FILTER_S_CMNT);
    }

    // ending up here only on expected end
    doc.startAtRule(atRule);
    if (atRule.hasBlock) {
      try {
        if (hasRuleSet(atRule, iter)) {
          while (!MATCH_CLOSEBRACE.apply(iter.next())) {
            if (iter.last.type == CssToken.Type.ATKEYWORD) {
              handleAtRule(iter.last, iter, doc, err);
            } else {
              handleRuleSet(iter.last, iter, doc, err);
            }
          }
        } else {
          handleDeclarationBlock(iter.next(), iter, doc, err);
        }
      } catch (NoSuchElementException nse) {
        err.error(new CssGrammarException(GRAMMAR_PREMATURE_EOF, iter.last.location, "'}'"));
        doc.endAtRule(atRule.name.get());
        throw new PrematureEOFException();
      }
    }
    doc.endAtRule(atRule.name.get());
  }
Esempio n. 2
0
  /**
   * With start expected to be an IDENT token representing the property name, build the declaration
   * and return after hitting ';' or '}'. On error, issue to errhandler, return null, caller
   * forwards.
   */
  private CssDeclaration handleDeclaration(
      CssToken name,
      CssTokenIterator iter,
      CssContentHandler doc,
      CssErrorHandler err,
      boolean isStyleAttribute)
      throws CssException {

    if (name.type != CssToken.Type.IDENT) {
      err.error(
          new CssGrammarException(
              GRAMMAR_EXPECTING_TOKEN,
              name.location,
              name.getChars(),
              Messages.get("a_property_name")));
      return null;
    }

    CssDeclaration declaration = new CssDeclaration(name.getChars(), name.location);

    try {
      if (!MATCH_COLON.apply(iter.next())) {
        err.error(
            new CssGrammarException(
                GRAMMAR_EXPECTING_TOKEN, name.location, iter.last.getChars(), ":"));
        return null;
      }
    } catch (NoSuchElementException nse) {
      err.error(new CssGrammarException(GRAMMAR_PREMATURE_EOF, iter.last.location, ":"));
      throw new PrematureEOFException();
    }

    try {
      while (true) {
        CssToken value = iter.next();
        if (MATCH_SEMI_CLOSEBRACE.apply(value)) {
          if (declaration.components.size() < 1) {
            err.error(
                new CssGrammarException(
                    GRAMMAR_EXPECTING_TOKEN,
                    iter.last.location,
                    value.getChar(),
                    Messages.get("a_property_value")));
            return null;
          } else {
            return declaration;
          }
        } else {
          if (!handlePropertyValue(declaration, value, iter, isStyleAttribute)) {
            err.error(
                new CssGrammarException(
                    GRAMMAR_UNEXPECTED_TOKEN, iter.last.location, iter.last.getChars()));
            return null;
          } else {
            if (isStyleAttribute && !iter.hasNext()) {
              return declaration;
            }
          }
        }
      }
    } catch (NoSuchElementException nse) {
      err.error(
          new CssGrammarException(
              GRAMMAR_PREMATURE_EOF, iter.last.location, "';' " + Messages.get("or") + " '}'"));
      throw new PrematureEOFException();
    }
  }