synthparser.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

    /**
     * Registers an object by name. This will throw an exception if an
     * object has already been registered under the given name.
     */
    private void register(String key, Object value) throws SAXException {
        if (key != null) {
            if (_mapping.get(key) != null ||
                     (_handler != null && _handler.lookup(key) != null)) {
                throw new SAXException("ID " + key + " is already defined");
            }
            if (_handler != null) {
                _handler.register(key, value);
            }
            else {
                _mapping.put(key, value);
            }
        }
    }

    /**
     * Convenience method to return the next int, or throw if there are no
     * more valid ints.
     */
    private int nextInt(StringTokenizer tok, String errorMsg) throws
                   SAXException {
        if (!tok.hasMoreTokens()) {
            throw new SAXException(errorMsg);
        }
        try {
            return Integer.parseInt(tok.nextToken());
        } catch (NumberFormatException nfe) {
            throw new SAXException(errorMsg);
        }
    }

    /**
     * Convenience method to return an Insets object.
     */
    private Insets parseInsets(String insets, String errorMsg) throws
                        SAXException {
        StringTokenizer tokenizer = new StringTokenizer(insets);
        return new Insets(nextInt(tokenizer, errorMsg),
                          nextInt(tokenizer, errorMsg),
                          nextInt(tokenizer, errorMsg),
                          nextInt(tokenizer, errorMsg));
    }



    //
    // The following methods are invoked from startElement/stopElement
    //

    private void startStyle(AttributeList attributes) throws SAXException {
        String id = null;

        _style = null;
        for(int i = attributes.getLength() - 1; i >= 0; i--) {
            String key = attributes.getName(i);
            if (key.equals(ATTRIBUTE_CLONE)) {
                _style = (ParsedSynthStyle)((ParsedSynthStyle)lookup(
                         attributes.getValue(i), ParsedSynthStyle.class)).
                         clone();
            }
            else if (key.equals(ATTRIBUTE_ID)) {
                id = attributes.getValue(i);
            }
        }
        if (_style == null) {
            _style = new ParsedSynthStyle();
        }
        register(id, _style);
    }

    private void endStyle() throws SAXException {
        int size = _stylePainters.size();
        if (size > 0) {
            _style.setPainters((ParsedSynthStyle.PainterInfo[])
                  _stylePainters.toArray(new ParsedSynthStyle.
                  PainterInfo[size]));
            _stylePainters.clear();
        }
        size = _stateInfos.size();
        if (size > 0) {
            _style.setStateInfo((ParsedSynthStyle.StateInfo[])_stateInfos.
                 toArray(new ParsedSynthStyle.StateInfo[size]));
            _stateInfos.clear();
        }
        _style = null;
    }

    private void startState(AttributeList attributes) throws SAXException {
        ParsedSynthStyle.StateInfo stateInfo = null;
        int state = 0;
        String id = null;

        _stateInfo = null;
        for(int i = attributes.getLength() - 1; i >= 0; i--) {
            String key = attributes.getName(i);
            if (key.equals(ATTRIBUTE_ID)) {
                id = attributes.getValue(i);
            }
            else if (key.equals(ATTRIBUTE_IDREF)) {
                _stateInfo = (ParsedSynthStyle.StateInfo)lookup(
                   attributes.getValue(i), ParsedSynthStyle.StateInfo.class);
            }
            else if (key.equals(ATTRIBUTE_CLONE)) {
                _stateInfo = (ParsedSynthStyle.StateInfo)((ParsedSynthStyle.
                             StateInfo)lookup(attributes.getValue(i),
                             ParsedSynthStyle.StateInfo.class)).clone();
            }
            else if (key.equals(ATTRIBUTE_VALUE)) {
                StringTokenizer tokenizer = new StringTokenizer(
                                   attributes.getValue(i));
                while (tokenizer.hasMoreTokens()) {
                    String stateString = tokenizer.nextToken().toUpperCase().
                                                   intern();
                    if (stateString == "ENABLED") {
                        state |= SynthConstants.ENABLED;
                    }
                    else if (stateString == "MOUSE_OVER") {
                        state |= SynthConstants.MOUSE_OVER;
                    }
                    else if (stateString == "PRESSED") {
                        state |= SynthConstants.PRESSED;
                    }
                    else if (stateString == "DISABLED") {
                        state |= SynthConstants.DISABLED;
                    }
                    else if (stateString == "FOCUSED") {
                        state |= SynthConstants.FOCUSED;
                    }
                    else if (stateString == "SELECTED") {
                        state |= SynthConstants.SELECTED;
                    }
                    else if (stateString == "DEFAULT") {
                        state |= SynthConstants.DEFAULT;
                    }
                    else if (stateString != "AND") {
                        throw new SAXException("Unknown state: " + state);
                    }
                }
            }
        }
        if (_stateInfo == null) {
            _stateInfo = new ParsedSynthStyle.StateInfo();
        }
        _stateInfo.setComponentState(state);
        register(id, _stateInfo);
        _stateInfos.add(_stateInfo);
    }

    private void endState() throws SAXException {
        int size = _statePainters.size();
        if (size > 0) {
            _stateInfo.setPainters((ParsedSynthStyle.PainterInfo[])
                  _statePainters.toArray(new ParsedSynthStyle.
                  PainterInfo[size]));
            _statePainters.clear();
        }
        _stateInfo = null;
    }

    private void startFont(AttributeList attributes) throws SAXException {
        Font font = null;
        int style = Font.PLAIN;
        int size = 0;
        String id = null;
        String name = null;

        for(int i = attributes.getLength() - 1; i >= 0; i--) {
            String key = attributes.getName(i);
            if (key.equals(ATTRIBUTE_ID)) {
                id = attributes.getValue(i);
            }
            else if (key.equals(ATTRIBUTE_IDREF)) {
                font = (Font)lookup(attributes.getValue(i), Font.class);
            }
            else if (key.equals(ATTRIBUTE_NAME)) {
                name = attributes.getValue(i);
            }
            else if (key.equals(ATTRIBUTE_SIZE)) {
                try {
                    size = Integer.parseInt(attributes.getValue(i));
                } catch (NumberFormatException nfe) {
                    throw new SAXException("Invalid font size: " +
                                           attributes.getValue(i));
                }
            }
            else if (key.equals(ATTRIBUTE_STYLE)) {
                StringTokenizer tok = new StringTokenizer(
                                                attributes.getValue(i));
                while (tok.hasMoreTokens()) {
                    String token = tok.nextToken().intern();
                    if (token == "BOLD") {
                        style = ((style | Font.PLAIN) ^ Font.PLAIN) |
                                Font.BOLD;
                    }
                    else if (token == "ITALIC") {
                        style |= Font.ITALIC;
                    }
                }
            }
        }
        if (font == null) {
            if (name == null) {
                throw new SAXException("You must define a name for the font");
            }
            if (size == 0) {
                throw new SAXException("You must define a size for the font");
            }
            font = new FontUIResource(name, style, size);
        }
        else if (name != null || size != 0 || style != Font.PLAIN) {
            throw new SAXException("Name, size and style are not for use " +
                                   "with idref");
        }
        register(id, font);
        if (_stateInfo != null) {
            _stateInfo.setFont(font);
        }
        else if (_style != null) {
            _style.setFont(font);
        }
    }

    private void startColor(AttributeList attributes) throws SAXException {
        Color color = null;
        String id = null;

        _colorTypes.clear();
        for(int i = attributes.getLength() - 1; i >= 0; i--) {
            String key = attributes.getName(i);
            if (key.equals(ATTRIBUTE_ID)) {
                id = attributes.getValue(i);
            }
            else if (key.equals(ATTRIBUTE_IDREF)) {
                color = (Color)lookup(attributes.getValue(i), Color.class);
            }
            else if (key.equals(ATTRIBUTE_NAME)) {
            }
            else if (key.equals(ATTRIBUTE_VALUE)) {
                String value = attributes.getValue(i);

                if (value.startsWith("#")) {
                    try {
                        int argb;
                        boolean hasAlpha;

                        int length = value.length();
                        if (length < 8) {
                            // Just RGB, or some portion of it.
                            argb = Integer.decode(value);
                            hasAlpha = false;
                        } else if (length == 8) {
                            // Single character alpha: #ARRGGBB.
                            argb = Integer.decode(value);
                            hasAlpha = true;
                        } else if (length == 9) {
                            // Color has alpha and is of the form 
                            // #AARRGGBB.
                            // The following split decoding is mandatory due to
                            // Integer.decode() behavior which won't decode
                            // hexadecimal values higher than #7FFFFFFF.
                            // Thus, when an alpha channel is detected, it is
                            // decoded separately from the RGB channels.
                            int rgb = Integer.decode('#' +
                                                     value.substring(3, 9));
                            int a = Integer.decode(value.substring(0, 3));
                            argb = (a << 24) | rgb;
                            hasAlpha = true;
                        } else {
                            throw new SAXException("Invalid Color value: "
                                + value);
                        }

                        color = new ColorUIResource(new Color(argb, hasAlpha));
                    } catch (NumberFormatException nfe) {
                        throw new SAXException("Invalid Color value: " +value);
                    }
                }
                else {
                    try {
                        color = new ColorUIResource((Color)Color.class.
                              getField(value.toUpperCase()).get(Color.class));
                    } catch (NoSuchFieldException nsfe) {
                        throw new SAXException("Invalid color name: " + value);
                    } catch (IllegalAccessException iae) {
                        throw new SAXException("Invalid color name: " + value);
                    }
                }
            }
            else if (key.equals(ATTRIBUTE_TYPE)) {
                StringTokenizer tokenizer = new StringTokenizer(
                                   attributes.getValue(i));
                while (tokenizer.hasMoreTokens()) {
                    String typeName = tokenizer.nextToken();
                    int classIndex = typeName.lastIndexOf('.');
                    Class typeClass;

                    if (classIndex == -1) {
                        typeClass = ColorType.class;
                        classIndex = 0;
                    }
                    else {
                        try {
                            typeClass = Class.forName(typeName.substring(
                                                      0, classIndex));
                        } catch (ClassNotFoundException cnfe) {
                            throw new SAXException("Unknown class: " +
                                      typeName.substring(0, classIndex));
                        }
                        classIndex++;
                    }
                    try {
                        _colorTypes.add((ColorType)checkCast(typeClass.
                              getField(typeName.substring(classIndex,
                              typeName.length() - classIndex)).
                              get(typeClass), ColorType.class));
                    } catch (NoSuchFieldException nsfe) {
                        throw new SAXException("Unable to find color type: " +
                                               typeName);
                    } catch (IllegalAccessException iae) {
                        throw new SAXException("Unable to find color type: " +
                                               typeName);
                    }
                }
            }
        }
        if (color == null) {
            throw new SAXException("color: you must specificy a value");