Examples with SyntaxError org.apache.felix.gogo.runtime.SyntaxError used on opensource projects

Example 1 with SyntaxError

use of org.apache.felix.gogo.runtime.SyntaxError in project felix by apache.

the class Highlighter method highlight.

public AttributedString highlight(LineReader reader, String buffer) {
    try {
        Program program = null;
        List<Token> tokens = null;
        List<Statement> statements = null;
        String repaired = buffer;
        while (program == null) {
            try {
                org.apache.felix.gogo.runtime.Parser parser = new org.apache.felix.gogo.runtime.Parser(repaired);
                program = parser.program();
                tokens = parser.tokens();
                statements = parser.statements();
            } catch (EOFError e) {
                repaired = repaired + " " + e.repair();
                // Make sure we don't loop forever
                if (repaired.length() > buffer.length() + 1024) {
                    return new AttributedStringBuilder().append(buffer).toAttributedString();
                }
            }
        }
        Map<String, String> colors = Posix.getColorMap(session, "HIGHLIGHTER", DEFAULT_HIGHLIGHTER_COLORS);
        int underlineStart = -1;
        int underlineEnd = -1;
        int negativeStart = -1;
        int negativeEnd = -1;
        String search = reader.getSearchTerm();
        if (search != null && search.length() > 0) {
            underlineStart = buffer.indexOf(search);
            if (underlineStart >= 0) {
                underlineEnd = underlineStart + search.length() - 1;
            }
        }
        if (reader.getRegionActive() != RegionType.NONE) {
            negativeStart = reader.getRegionMark();
            negativeEnd = reader.getBuffer().cursor();
            if (negativeStart > negativeEnd) {
                int x = negativeEnd;
                negativeEnd = negativeStart;
                negativeStart = x;
            }
            if (reader.getRegionActive() == RegionType.LINE) {
                while (negativeStart > 0 && reader.getBuffer().atChar(negativeStart - 1) != '\n') {
                    negativeStart--;
                }
                while (negativeEnd < reader.getBuffer().length() - 1 && reader.getBuffer().atChar(negativeEnd + 1) != '\n') {
                    negativeEnd++;
                }
            }
        }
        Type[] types = new Type[repaired.length()];
        Arrays.fill(types, Type.Unknown);
        int cur = 0;
        for (Token token : tokens) {
            // We're on the repair side, so exit now
            if (token.start() >= buffer.length()) {
                break;
            }
            if (token.start() > cur) {
                cur = token.start();
            }
            // Find corresponding statement
            Statement statement = null;
            for (int i = statements.size() - 1; i >= 0; i--) {
                Statement s = statements.get(i);
                if (s.start() <= cur && cur < s.start() + s.length()) {
                    statement = s;
                    break;
                }
            }
            // Reserved tokens
            Type type = Type.Unknown;
            if (Token.eq(token, "{") || Token.eq(token, "}") || Token.eq(token, "(") || Token.eq(token, ")") || Token.eq(token, "[") || Token.eq(token, "]") || Token.eq(token, "|") || Token.eq(token, ";") || Token.eq(token, "=")) {
                type = Type.Reserved;
            } else if (token.charAt(0) == '\'' || token.charAt(0) == '"') {
                type = Type.String;
            } else if (token.toString().matches("^[-+]?[0-9]*\\.?[0-9]+([eE][-+]?[0-9]+)?$")) {
                type = Type.Number;
            } else if (token.charAt(0) == '$') {
                type = Type.Variable;
            } else if (((Set) session.get(CommandSessionImpl.CONSTANTS)).contains(token.toString()) || Token.eq(token, "null") || Token.eq(token, "false") || Token.eq(token, "true")) {
                type = Type.Constant;
            } else {
                boolean isFirst = statement != null && statement.tokens().size() > 0 && token == statement.tokens().get(0);
                boolean isThirdWithNext = statement != null && statement.tokens().size() > 3 && token == statement.tokens().get(2);
                boolean isAssign = statement != null && statement.tokens().size() > 1 && Token.eq(statement.tokens().get(1), "=");
                if (isFirst && isAssign) {
                    type = Type.VariableName;
                }
                if (isFirst && !isAssign || isAssign && isThirdWithNext) {
                    Object v = session.get(Shell.resolve(session, token.toString()));
                    type = (v instanceof Function) ? Type.Function : Type.BadFunction;
                }
            }
            Arrays.fill(types, token.start(), Math.min(token.start() + token.length(), types.length), type);
            cur = Math.min(token.start() + token.length(), buffer.length());
        }
        if (buffer.length() < repaired.length()) {
            Arrays.fill(types, buffer.length(), repaired.length(), Type.Repair);
        }
        AttributedStringBuilder sb = new AttributedStringBuilder();
        for (int i = 0; i < repaired.length(); i++) {
            sb.style(AttributedStyle.DEFAULT);
            applyStyle(sb, colors, types[i]);
            if (i >= underlineStart && i <= underlineEnd) {
                sb.style(sb.style().underline());
            }
            if (i >= negativeStart && i <= negativeEnd) {
                sb.style(sb.style().inverse());
            }
            char c = repaired.charAt(i);
            if (c == '\t' || c == '\n') {
                sb.append(c);
            } else if (c < 32) {
                sb.style(sb.style().inverseNeg()).append('^').append((char) (c + '@')).style(sb.style().inverseNeg());
            } else {
                int w = WCWidth.wcwidth(c);
                if (w > 0) {
                    sb.append(c);
                }
            }
        }
        return sb.toAttributedString();
    } catch (SyntaxError e) {
        return super.highlight(reader, buffer);
    }
}