Examples of org.w3c.css.sac.LexicalUnit

org.w3c.css.sac.LexicalUnit
This is a lexical unit for CSS values.
Remarks: Not all the following lexical units are supported (or will be supported) by CSS.
All examples are CSS2 compliant. @version $Revision: 1.3 $ @author Philippe Le Hegaret

     * @param prop The property name.
     * @param value The property value.
     */
    public Value parsePropertyValue(String prop, String value) {
        try {
            LexicalUnit lu;
            int idx = getPropertyIndex(prop);
            lu = parser.parsePropertyValue(value);
            ValueManager vm = valueManagers[idx];
            return vm.createValue(lu, this);
        } catch (Exception e) {

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        switch (evt.getAttrChange()) {
        case MutationEvent.ADDITION:
        case MutationEvent.MODIFICATION:
            element = elt;
            try {
                LexicalUnit lu;
                lu = parser.parsePropertyValue(evt.getNewValue());
                ValueManager vm = valueManagers[idx];
                Value v = vm.createValue(lu, CSSEngine.this);
                style.putMask(idx, (short)0);
                style.putValue(idx, v);

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    if (styleSheetParserUtil == null)
    {
      styleSheetParserUtil = StyleSheetParserUtil.getInstance();
    }


    final LexicalUnit cssValue = styleSheetParserUtil.parseLexicalStyleValue(
        text);
    return CSSValueFactory.createLengthValue(cssValue);
  }

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        }


        Parser cssParser = new Parser();
        // see if the property supports the value 'inherit'
        try {
            LexicalUnit lu = cssParser.parsePropertyValue("inherit");
            Value v = manager.createValue(lu, null);
            String s = v.getCssText();
            if (!"inherit".equalsIgnoreCase(s)) {
                report.setErrorCode(ERROR_INHERIT_VALUE);
                report.setPassed(false);
                report.addDescriptionEntry(ERROR_INHERIT_VALUE, "inherit");
            }
        } catch (Exception ex) {
            report.setErrorCode(ERROR_INHERIT_VALUE);
            report.setPassed(false);
            report.addDescriptionEntry(ERROR_INHERIT_VALUE, ex.getMessage());
        }


        // test all possible identifiers
        if (identValues != null) {
            try {
                for (int i=0; i < identValues.length; ++i) {
                    LexicalUnit lu = cssParser.parsePropertyValue(identValues[i]);
                    Value v = manager.createValue(lu, null);
                    String s = v.getCssText();
                    if (!identValues[i].equalsIgnoreCase(s)) {
                        report.setErrorCode(ERROR_INVALID_VALUE);
                        report.setPassed(false);

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     */
    protected LexicalUnit parsePropertyValueInternal() 
  throws CSSException, IOException {
        nextIgnoreSpaces();
        
        LexicalUnit exp = null;


        try {
            exp = parseExpression(false);
        } catch (CSSParseException e) {
            reportError(e);

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            if (nextIgnoreSpaces() != LexicalUnits.COLON) {
                throw createCSSParseException("colon");
            }
            nextIgnoreSpaces();
        
            LexicalUnit exp = null;
            
            try {
                exp = parseExpression(false);
            } catch (CSSParseException e) {
                reportError(e);

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    /**
     * Parses a CSS2 expression.
     * @param param whether the expression to be parsed is a function parameter
     */
    protected LexicalUnit parseExpression(boolean param) {
        LexicalUnit result = parseTerm(null);
        LexicalUnit curr = result;


        for (;;) {
            boolean op = false;
            switch (current) {
            case LexicalUnits.COMMA:

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     */
    protected LexicalUnit parseFunction(boolean positive, LexicalUnit prev) {
        String name = scanner.getStringValue();
        nextIgnoreSpaces();
        
        LexicalUnit params = parseExpression(true);


        if (current != LexicalUnits.RIGHT_BRACE) {
            throw createCSSParseException
                ("token",
                 new Object[] { new Integer(current) });
        }
        nextIgnoreSpaces();


        predefined: switch (name.charAt(0)) {
        case 'r':
        case 'R':
            LexicalUnit lu;
            if (name.equalsIgnoreCase("rgb")) {
                lu = params;
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu != null) {
                    break;
                }
                return CSSLexicalUnit.createPredefinedFunction
                    (LexicalUnit.SAC_RGBCOLOR, params, prev);
            } else if (name.equalsIgnoreCase("rect")) {
                lu = params;
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                    if (lu.getIntegerValue() != 0) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_IDENT:
                    if (!lu.getStringValue().equalsIgnoreCase("auto")) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_EM:
                case LexicalUnit.SAC_EX:
                case LexicalUnit.SAC_PIXEL:
                case LexicalUnit.SAC_CENTIMETER:
                case LexicalUnit.SAC_MILLIMETER:
                case LexicalUnit.SAC_INCH:
                case LexicalUnit.SAC_POINT:
                case LexicalUnit.SAC_PICA:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                    if (lu.getIntegerValue() != 0) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_IDENT:
                    if (!lu.getStringValue().equalsIgnoreCase("auto")) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_EM:
                case LexicalUnit.SAC_EX:
                case LexicalUnit.SAC_PIXEL:
                case LexicalUnit.SAC_CENTIMETER:
                case LexicalUnit.SAC_MILLIMETER:
                case LexicalUnit.SAC_INCH:
                case LexicalUnit.SAC_POINT:
                case LexicalUnit.SAC_PICA:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                    if (lu.getIntegerValue() != 0) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_IDENT:
                    if (!lu.getStringValue().equalsIgnoreCase("auto")) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_EM:
                case LexicalUnit.SAC_EX:
                case LexicalUnit.SAC_PIXEL:
                case LexicalUnit.SAC_CENTIMETER:
                case LexicalUnit.SAC_MILLIMETER:
                case LexicalUnit.SAC_INCH:
                case LexicalUnit.SAC_POINT:
                case LexicalUnit.SAC_PICA:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_INTEGER:
                    if (lu.getIntegerValue() != 0) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_IDENT:
                    if (!lu.getStringValue().equalsIgnoreCase("auto")) {
                        break predefined;
                    }
                    lu = lu.getNextLexicalUnit();
                    break;
                case LexicalUnit.SAC_EM:
                case LexicalUnit.SAC_EX:
                case LexicalUnit.SAC_PIXEL:
                case LexicalUnit.SAC_CENTIMETER:
                case LexicalUnit.SAC_MILLIMETER:
                case LexicalUnit.SAC_INCH:
                case LexicalUnit.SAC_POINT:
                case LexicalUnit.SAC_PICA:
                case LexicalUnit.SAC_PERCENTAGE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu != null) {
                    break;
                }
                return CSSLexicalUnit.createPredefinedFunction
                    (LexicalUnit.SAC_RECT_FUNCTION, params, prev);
            }
            break;
        case 'c':
        case 'C':
            if (name.equalsIgnoreCase("counter")) {
                lu = params;
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_IDENT:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_IDENT:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu != null) {
                    break;
                }
                return CSSLexicalUnit.createPredefinedFunction
                    (LexicalUnit.SAC_COUNTER_FUNCTION, params, prev);
            } else if (name.equalsIgnoreCase("counters")) {
                lu = params;
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_IDENT:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_STRING_VALUE:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_OPERATOR_COMMA:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_IDENT:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu != null) {
                    break;
                }
                return CSSLexicalUnit.createPredefinedFunction
                    (LexicalUnit.SAC_COUNTERS_FUNCTION, params, prev);
            }
            break;
        case 'a':
        case 'A':
            if (name.equalsIgnoreCase("attr")) {
                lu = params;
                if (lu == null) {
                    break;
                }
                switch (lu.getLexicalUnitType()) {
                default:
                    break predefined;
                case LexicalUnit.SAC_IDENT:
                    lu = lu.getNextLexicalUnit();
                }
                if (lu != null) {
                    break;
                }
                return CSSLexicalUnit.createString

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     * Converts a hash unit to a RGB color.
     */
    protected LexicalUnit hexcolor(LexicalUnit prev) {
        String val = scanner.getStringValue();
        int len = val.length();
        LexicalUnit params = null;
        switch (len) {
        case 3:
            char rc = Character.toLowerCase(val.charAt(0));
            char gc = Character.toLowerCase(val.charAt(1));
            char bc = Character.toLowerCase(val.charAt(2));
            if (!ScannerUtilities.isCSSHexadecimalCharacter(rc) ||
                !ScannerUtilities.isCSSHexadecimalCharacter(gc) ||
                !ScannerUtilities.isCSSHexadecimalCharacter(bc)) {
                throw createCSSParseException
                    ("rgb.color", new Object[] { val });
            }
            int t;
            int r = t = (rc >= '0' && rc <= '9') ? rc - '0' : rc - 'a' + 10;
            t <<= 4;
            r |= t;
            int g = t = (gc >= '0' && gc <= '9') ? gc - '0' : gc - 'a' + 10;
            t <<= 4;
            g |= t;
            int b = t = (bc >= '0' && bc <= '9') ? bc - '0' : bc - 'a' + 10;
            t <<= 4;
            b |= t;
            params = CSSLexicalUnit.createInteger(r, null);
            LexicalUnit tmp;
            tmp = CSSLexicalUnit.createSimple
                (LexicalUnit.SAC_OPERATOR_COMMA, params);
            tmp = CSSLexicalUnit.createInteger(g, tmp);
            tmp = CSSLexicalUnit.createSimple
                (LexicalUnit.SAC_OPERATOR_COMMA, tmp);

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                for (int i = 0; i < len; i++) {
                    Node attr = attrs.item(i);
                    String an = attr.getNodeName();
                    if (nonCSSPresentationalHints.contains(an)) {
                        try {
                            LexicalUnit lu;
                            lu = parser.parsePropertyValue(attr.getNodeValue());
                            ph.property(an, lu, false);
                        } catch (Exception e) {
                            String m = e.getMessage();
                            if (m == null) m = "";

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