Java 类java.text.AttributedCharacterIterator 实例源码

static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {

        Object value = aci.getAttribute(TextAttribute.FONT);
        if (value != null) {
            return (Font) value;
        }
        if (aci.getAttribute(TextAttribute.FAMILY) != null) {
            return Font.getFont(aci.getAttributes());
        }

        int ch = CodePointIterator.create(aci).next();
        if (ch != CodePointIterator.DONE) {
            FontResolver resolver = FontResolver.getInstance();
            return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
        }
        return null;
    }

@Override
public void write(Text text, Writer writer) throws IOException {
  AttributedCharacterIterator iterator = text.getIterator();

  Entry<Attribute, Object> lastAttribute = null;
  while (true) {
    if (iterator.getIndex() == iterator.getEndIndex()) {
      break;
    }

    Entry<Attribute, Object> entry = getAttribute(iterator);

    if (!Objects.equals(entry, lastAttribute)) {
      endEntity(lastAttribute, writer);
      beginEntity(entry, writer);
    }

    writer.write(iterator.current());

    lastAttribute = entry;
    iterator.next();
  }

  endEntity(lastAttribute, writer);
}

private static AttributedCharacterIterator getTrimmedTrailingSpacesIterator
        (AttributedCharacterIterator iterator) {
    int curIdx = iterator.getIndex();

    char c = iterator.last();
    while(c != CharacterIterator.DONE && Character.isWhitespace(c)) {
        c = iterator.previous();
    }

    if (c != CharacterIterator.DONE) {
        int endIdx = iterator.getIndex();

        if (endIdx == iterator.getEndIndex() - 1) {
            iterator.setIndex(curIdx);
            return iterator;
        } else {
            AttributedString trimmedText = new AttributedString(iterator,
                    iterator.getBeginIndex(), endIdx + 1);
            return trimmedText.getIterator();
        }
    } else {
        return null;
    }
}

private static final void checkIteratorText(AttributedCharacterIterator iterator, String expectedText) throws Exception {
    if (iterator.getEndIndex() - iterator.getBeginIndex() != expectedText.length()) {
        throwException(iterator, "text length doesn't match between original text and iterator");
    }

    char c = iterator.first();
    for (int i = 0; i < expectedText.length(); i++) {
        if (c != expectedText.charAt(i)) {
            throwException(iterator, "text content doesn't match between original text and iterator");
        }
        c = iterator.next();
    }
    if (c != CharacterIterator.DONE) {
        throwException(iterator, "iterator text doesn't end with DONE");
    }
}

/**
 * Selects the passed in field, returning true if it is found, false
 * otherwise.
 */
private boolean select(JFormattedTextField ftf, AttributedCharacterIterator iterator, DateFormat.Field field)
{
    int max = ftf.getDocument().getLength();

    iterator.first();
    do
    {
        Map<Attribute, Object> attrs = iterator.getAttributes();

        if( attrs != null && attrs.containsKey(field) )
        {
            int start = iterator.getRunStart(field);
            int end = iterator.getRunLimit(field);

            if( start != -1 && end != -1 && start <= max && end <= max )
            {
                ftf.select(start, end);
            }
            return true;
        }
    }
    while( iterator.next() != CharacterIterator.DONE );
    return false;
}

private static AttributedCharacterIterator getTrimmedTrailingSpacesIterator
        (AttributedCharacterIterator iterator) {
    int curIdx = iterator.getIndex();

    char c = iterator.last();
    while(c != CharacterIterator.DONE && Character.isWhitespace(c)) {
        c = iterator.previous();
    }

    if (c != CharacterIterator.DONE) {
        int endIdx = iterator.getIndex();

        if (endIdx == iterator.getEndIndex() - 1) {
            iterator.setIndex(curIdx);
            return iterator;
        } else {
            AttributedString trimmedText = new AttributedString(iterator,
                    iterator.getBeginIndex(), endIdx + 1);
            return trimmedText.getIterator();
        }
    } else {
        return null;
    }
}

static Font getFontAtCurrentPos(AttributedCharacterIterator aci) {

        Object value = aci.getAttribute(TextAttribute.FONT);
        if (value != null) {
            return (Font) value;
        }
        if (aci.getAttribute(TextAttribute.FAMILY) != null) {
            return Font.getFont(aci.getAttributes());
        }

        int ch = CodePointIterator.create(aci).next();
        if (ch != CodePointIterator.DONE) {
            FontResolver resolver = FontResolver.getInstance();
            return resolver.getFont(resolver.getFontIndex(ch), aci.getAttributes());
        }
        return null;
    }

public Object getAttribute(AttributedCharacterIterator.Attribute att) {
    if (att == TextAttribute.FONT) {
        return fonts[getIndex()];
    } else if (att == TextAttribute.FOREGROUND) {
        return colors[getIndex()];
    } else {
        return null;
    }
}

public Map<AttributedCharacterIterator.Attribute,Object> getAttributes() {
    Map<AttributedCharacterIterator.Attribute,Object> m = new HashMap<AttributedCharacterIterator.Attribute,Object>(1);
    m.put(TextAttribute.FONT, fonts[getIndex()]);
    m.put(TextAttribute.FOREGROUND, colors[getIndex()]);

    return m;
}

public int getRunLimit(AttributedCharacterIterator.Attribute att) {
    if ((att != TextAttribute.FONT) && (att != TextAttribute.FOREGROUND)) {
        return getEndIndex(); // undefined attribute
    }

    return getRunLimit();
}

/**
 * Create a TextLine from the text.  chars is just the text in the iterator.
 */
public static TextLine standardCreateTextLine(FontRenderContext frc,
                                              AttributedCharacterIterator text,
                                              char[] chars,
                                              float[] baselineOffsets) {

    StyledParagraph styledParagraph = new StyledParagraph(text, chars);
    Bidi bidi = new Bidi(text);
    if (bidi.isLeftToRight()) {
        bidi = null;
    }
    int layoutFlags = 0; // no extra info yet, bidi determines run and line direction
    TextLabelFactory factory = new TextLabelFactory(frc, chars, bidi, layoutFlags);

    boolean isDirectionLTR = true;
    if (bidi != null) {
        isDirectionLTR = bidi.baseIsLeftToRight();
    }
    return createLineFromText(chars, styledParagraph, factory, isDirectionLTR, baselineOffsets);
}

ComponentLine(AttributedCharacterIterator it, Font defaultFont, Color defaultColor) {
    for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
        Font font = (Font) it.getAttribute(TextAttribute.FONT);
        Color color = (Color) it.getAttribute(TextAttribute.FOREGROUND);
        mySymbols.add(new Symbol(c, createFont(font, defaultFont), createColor(color, defaultColor)));
    }
    checkSpaces(defaultFont, defaultColor);
}

/**
 * Returns the index of the first character following the run
 * with respect to the given attribute containing the current character.
 */
public int getRunLimit(AttributedCharacterIterator.Attribute attribute) {
    if (attribute instanceof TextAttribute) {
        int pos = toModelPosition(getIndex());
        int i = v.getViewIndex(pos, Position.Bias.Forward);
        if (attribute == TextAttribute.FONT) {
            return toIteratorIndex(getFontBoundary(i, 1));
        }
    }
    return getEndIndex();
}

/**
 * When this returns, the ACI's current position will be at the start of the
 * first run which does NOT contain a GraphicAttribute.  If no such run exists
 * the ACI's position will be at the end, and this method will return false.
 */
static boolean advanceToFirstFont(AttributedCharacterIterator aci) {

    for (char ch = aci.first();
         ch != CharacterIterator.DONE;
         ch = aci.setIndex(aci.getRunLimit()))
    {

        if (aci.getAttribute(TextAttribute.CHAR_REPLACEMENT) == null) {
            return true;
        }
    }

    return false;
}

private AttributeSet translateAttributes(Map<AttributedCharacterIterator.Attribute, ?> source) {
    for(AttributedCharacterIterator.Attribute sourceKey : source.keySet()) {
        Object sourceValue = source.get(sourceKey);

        // Ignore any non-input method related highlights
        if (!(sourceValue instanceof InputMethodHighlight)) {
            continue;
        }

        InputMethodHighlight imh = (InputMethodHighlight) sourceValue;

        if (imh.isSelected()) {
            return highlightInverse;
        } else {
            return highlightUnderlined;
        }
    }

    LOG.fine("No translation for " + source);
    return SimpleAttributeSet.EMPTY;
}

@SuppressWarnings("unchecked")
private <T> List<Map.Entry<String, T>> getEntitiesWithValues(TextEntity entity) {
  AttributedCharacterIterator iterator = getIterator();
  List<Map.Entry<String, T>> entities = new ArrayList<>();
  StringBuilder builder = new StringBuilder();

  Map<AttributedCharacterIterator.Attribute, T> last = Collections.emptyMap();
  while (iterator.getIndex() != iterator.getEndIndex()) {
    Map<AttributedCharacterIterator.Attribute, T> curr =
        (Map<AttributedCharacterIterator.Attribute, T>) iterator.getAttributes();
    if (curr.containsKey(entity)) {
      builder.append(iterator.current());
    } else {
      if (last.containsKey(entity)) {
        entities.add(
            new AbstractMap.SimpleImmutableEntry<>(builder.toString(), last.get(entity))
        );
        builder.setLength(0);
      }
    }
    last = curr;

    iterator.next();
  }
  if (last.containsKey(entity)) {
    entities.add(
        new AbstractMap.SimpleImmutableEntry<>(builder.toString(), last.get(entity))
    );
  }

  return entities;
}

/**
 * Constructs a {@code TextLayout} from an iterator over styled text.
 * <p>
 * The iterator must specify a single paragraph of text because an
 * entire paragraph is required for the bidirectional
 * algorithm.
 * @param text the styled text to display
 * @param frc contains information about a graphics device which is needed
 *       to measure the text correctly.
 *       Text measurements can vary slightly depending on the
 *       device resolution, and attributes such as antialiasing.  This
 *       parameter does not specify a translation between the
 *       {@code TextLayout} and user space.
 */
public TextLayout(AttributedCharacterIterator text, FontRenderContext frc) {

    if (text == null) {
        throw new IllegalArgumentException("Null iterator passed to TextLayout constructor.");
    }

    int start = text.getBeginIndex();
    int limit = text.getEndIndex();
    if (start == limit) {
        throw new IllegalArgumentException("Zero length iterator passed to TextLayout constructor.");
    }

    int len = limit - start;
    text.first();
    char[] chars = new char[len];
    int n = 0;
    for (char c = text.first();
         c != CharacterIterator.DONE;
         c = text.next())
    {
        chars[n++] = c;
    }

    text.first();
    if (text.getRunLimit() == limit) {

        Map<? extends Attribute, ?> attributes = text.getAttributes();
        Font font = singleFont(chars, 0, len, attributes);
        if (font != null) {
            fastInit(chars, font, attributes, frc);
            return;
        }
    }

    standardInit(text, chars, frc);
}

private LineBreakMeasurer[] getLineBreakMeasurers(Graphics2D g) {
    if (lbmTexto == null && (Texto != null && !Texto.equals(""))) {
        lbmTexto = new LineBreakMeasurer[Textos.length];
        for (int i = 0; i < lbmTexto.length; i++) {
            String tmp = Textos[i].isEmpty()? " " : Textos[i];
            AttributedString attribString = new AttributedString(tmp);
            attribString.addAttribute(TextAttribute.FONT, getFont());
            //attribString.addAttribute(TextAttribute.FONT, getFont());
            AttributedCharacterIterator attribCharIterator = attribString.getIterator();
            //FontRenderContext frc = new FontRenderContext(null, true, false);
            FontRenderContext frc = g.getFontRenderContext();
            lbmTexto[i] = new LineBreakMeasurer(attribCharIterator, frc);
        }
    }
    return lbmTexto;
}

static void append(
        AttributedCharacterIterator iterator,
        int start,
        int limit,
        StringBuilder result) {
    int oldIndex = iterator.getIndex();
    iterator.setIndex(start);
    for (int i = start; i < limit; i++) {
        result.append(iterator.current());
        iterator.next();
    }
    iterator.setIndex(oldIndex);
}

@Override
String format(
        AttributedCharacterIterator iterator,
        String preExponent) {
    int copyFromOffset = 0;
    StringBuilder result = new StringBuilder();
    for (
            iterator.first();
            iterator.current() != CharacterIterator.DONE;
        ) {
        Map<Attribute, Object> attributeSet = iterator.getAttributes();
        if (attributeSet.containsKey(NumberFormat.Field.EXPONENT_SYMBOL)) {
            append(
                    iterator,
                    copyFromOffset,
                    iterator.getRunStart(NumberFormat.Field.EXPONENT_SYMBOL),
                    result);
            copyFromOffset = iterator.getRunLimit(NumberFormat.Field.EXPONENT_SYMBOL);
            iterator.setIndex(copyFromOffset);
            result.append(preExponent);
            result.append(beginMarkup);
        } else if (attributeSet.containsKey(NumberFormat.Field.EXPONENT)) {
            int limit = iterator.getRunLimit(NumberFormat.Field.EXPONENT);
            append(
                    iterator,
                    copyFromOffset,
                    limit,
                    result);
            copyFromOffset = limit;
            iterator.setIndex(copyFromOffset);
            result.append(endMarkup);
        } else {
            iterator.next();
        }
    }
    append(iterator, copyFromOffset, iterator.getEndIndex(), result);
    return result.toString();
}

private static void copyAsSuperscript(
        AttributedCharacterIterator iterator, int start, int limit, StringBuilder result) {
    int oldIndex = iterator.getIndex();
    iterator.setIndex(start);
    while (iterator.getIndex() < limit) {
        int aChar = char32AtAndAdvance(iterator);
        int digit = UCharacter.digit(aChar);
        if (digit < 0) {
            throw new IllegalArgumentException();
        }
        result.append(SUPERSCRIPT_DIGITS[digit]);
    }
    iterator.setIndex(oldIndex);
}

/**
 * {@inheritDoc}
 *
 * @stable ICU 49
 */
@Override
public AttributedCharacterIterator formatToCharacterIterator(Object obj) {
    StringBuffer toAppendTo = new StringBuffer();
    FieldPosition pos = new FieldPosition(0);
    toAppendTo = format(obj, toAppendTo, pos);

    // supporting only DateFormat.Field.TIME_ZONE
    AttributedString as = new AttributedString(toAppendTo.toString());
    as.addAttribute(DateFormat.Field.TIME_ZONE, DateFormat.Field.TIME_ZONE);

    return as.getIterator();
}

private void drawStringUsingShapes(AttributedCharacterIterator iterator, float x, float y) {
    Stroke originalStroke = stroke;
    Paint originalPaint = paint;
    TextLayout textLayout = new TextLayout(iterator, getFontRenderContext());
    textLayout.draw(this, x, y);
    paint = originalPaint;
    stroke = originalStroke;
}

/**
 * When this returns, the ACI's current position will be at the start of the
 * first run which does NOT contain a GraphicAttribute.  If no such run exists
 * the ACI's position will be at the end, and this method will return false.
 */
static boolean advanceToFirstFont(AttributedCharacterIterator aci) {

    for (char ch = aci.first();
         ch != CharacterIterator.DONE;
         ch = aci.setIndex(aci.getRunLimit()))
    {

        if (aci.getAttribute(TextAttribute.CHAR_REPLACEMENT) == null) {
            return true;
        }
    }

    return false;
}

@SuppressWarnings("serial")
private static AttributedCharacterIterator.Attribute
    getTextAttribute(String name)
{
    if (jafa == null) {
        // fake attribute
        return new AttributedCharacterIterator.Attribute(name) { };
    } else {
        return (AttributedCharacterIterator.Attribute)jafa.getTextAttributeConstant(name);
    }
}

public void drawString(AttributedCharacterIterator iterator,
                       float x, float y) {
    if (iterator == null) {
        throw new NullPointerException("AttributedCharacterIterator is null");
    }
    if (iterator.getBeginIndex() == iterator.getEndIndex()) {
        return; /* nothing to draw */
    }
    TextLayout tl = new TextLayout(iterator, getFontRenderContext());
    tl.draw(this, x, y);
}

public void dispatchInputMethodEvent(int id,
            AttributedCharacterIterator text, int committedCharacterCount,
            TextHitInfo caret, TextHitInfo visiblePosition) {
    // We need to record the client component as the source so
    // that we have correct information if we later have to break up this
    // event into key events.
    Component source;

    source = getClientComponent();
    if (source != null) {
        InputMethodEvent event = new InputMethodEvent(source,
                id, text, committedCharacterCount, caret, visiblePosition);

        if (haveActiveClient() && !useBelowTheSpotInput()) {
            source.dispatchEvent(event);
        } else {
            getCompositionAreaHandler(true).processInputMethodEvent(event);
        }
    }
}

private static final void checkIteratorSubranges(AttributedCharacterIterator iterator, Attribute key, int[] expectedLimits) throws Exception {
    int previous = 0;
    char c = iterator.first();
    for (int i = 0; i < expectedLimits.length; i++) {
         if (iterator.getRunStart(key) != previous || iterator.getRunLimit(key) != expectedLimits[i]) {
             throwException(iterator, "run boundaries are not as expected: " + iterator.getRunStart(key) + ", " + iterator.getRunLimit(key) + " for key " + key);
         }
         previous = expectedLimits[i];
         c = iterator.setIndex(previous);
    }
    if (c != CharacterIterator.DONE) {
        throwException(iterator, "iterator's run sequence doesn't end with DONE");
    }
}

public void dispatchInputMethodEvent(int id,
            AttributedCharacterIterator text, int committedCharacterCount,
            TextHitInfo caret, TextHitInfo visiblePosition) {
    // We need to record the client component as the source so
    // that we have correct information if we later have to break up this
    // event into key events.
    Component source;

    source = getClientComponent();
    if (source != null) {
        InputMethodEvent event = new InputMethodEvent(source,
                id, text, committedCharacterCount, caret, visiblePosition);

        if (haveActiveClient() && !useBelowTheSpotInput()) {
            source.dispatchEvent(event);
        } else {
            getCompositionAreaHandler(true).processInputMethodEvent(event);
        }
    }
}

@Override
public Dimension getPreferredSize(JComponent c) {
    String tipText = ((JToolTip)c).getTipText();
    if (tipText == null || tipText.isEmpty()) {
        return new Dimension(0, 0);
    }

    float x = 0f;
    float y = 0f;
    for (String line : lineBreak.split(tipText)) {
        if (line.isEmpty()) {
            y += LEADING;
            continue;
        }
        AttributedCharacterIterator styledText
            = new AttributedString(line).getIterator();
        LineBreakMeasurer measurer = new LineBreakMeasurer(styledText, frc);

        while (measurer.getPosition() < styledText.getEndIndex()) {

            TextLayout layout = measurer.nextLayout(maximumWidth);

            x = Math.max(x, layout.getVisibleAdvance());
            y += layout.getAscent() + layout.getDescent() + layout.getLeading();

        }
    }
    return new Dimension((int) (x + 2 * margin),
                         (int) (y + 2 * margin));

}

public void drawString(AttributedCharacterIterator iterator,
                       float x, float y) {
    if (iterator == null) {
        throw
            new NullPointerException("attributedcharacteriterator is null");
    }
    TextLayout layout =
        new TextLayout(iterator, getFontRenderContext());
    layout.draw(this, x, y);
}

public Set<AttributedCharacterIterator.Attribute> getAllAttributeKeys() {
    if (singleton == null) {
        Set<AttributedCharacterIterator.Attribute> l = new HashSet<AttributedCharacterIterator.Attribute>(4);
        l.add(TextAttribute.FONT);
        l.add(TextAttribute.FOREGROUND);
        singleton = Collections.unmodifiableSet(l);
    }

    return singleton;
}

public int getRunStart(AttributedCharacterIterator.Attribute att) {
    if ((att != TextAttribute.FONT) && (att != TextAttribute.FOREGROUND)) {
        return 0; // undefined attribute
    }

    return getRunStart();
}

AttributedCharacterIterator[] getIterators() {
    AttributedCharacterIterator[] iterators = new AttributedCharacterIterator[myCharactersList.size()];

    for (int i = 0; i < myCharactersList.size(); i++) {
        iterators[i] = myCharactersList.get(i).iterator();
    }
    return iterators;
}

public AttributedCharacterIterator[] getIterators() {
    int cnt = acl.size();
    AttributedCharacterIterator[] acis = new AttributedCharacterIterator[cnt];
    for (int i = 0; i < cnt; i++) {
        AttributedCharacters ac = (AttributedCharacters)acl.get(i);
        acis[i] = ac.iterator();
    }
    return acis;
}

/**
 * Return a StyledParagraph reflecting the insertion of a single character
 * into the text.  This method will attempt to reuse the given paragraph,
 * but may create a new paragraph.
 * @param aci an iterator over the text.  The text should be the same as the
 *     text used to create (or most recently update) oldParagraph, with
 *     the exception of inserting a single character at insertPos.
 * @param chars the characters in aci
 * @param insertPos the index of the new character in aci
 * @param oldParagraph a StyledParagraph for the text in aci before the
 *     insertion
 */
public static StyledParagraph insertChar(AttributedCharacterIterator aci,
                                         char[] chars,
                                         int insertPos,
                                         StyledParagraph oldParagraph) {

    // If the styles at insertPos match those at insertPos-1,
    // oldParagraph will be reused.  Otherwise we create a new
    // paragraph.

    char ch = aci.setIndex(insertPos);
    int relativePos = Math.max(insertPos - aci.getBeginIndex() - 1, 0);

    Map<? extends Attribute, ?> attributes =
        addInputMethodAttrs(aci.getAttributes());
    Decoration d = Decoration.getDecoration(attributes);
    if (!oldParagraph.getDecorationAt(relativePos).equals(d)) {
        return new StyledParagraph(aci, chars);
    }
    Object f = getGraphicOrFont(attributes);
    if (f == null) {
        FontResolver resolver = FontResolver.getInstance();
        int fontIndex = resolver.getFontIndex(ch);
        f = resolver.getFont(fontIndex, attributes);
    }
    if (!oldParagraph.getFontOrGraphicAt(relativePos).equals(f)) {
        return new StyledParagraph(aci, chars);
    }

    // insert into existing paragraph
    oldParagraph.length += 1;
    if (oldParagraph.decorations != null) {
        insertInto(relativePos,
                   oldParagraph.decorationStarts,
                   oldParagraph.decorations.size());
    }
    if (oldParagraph.fonts != null) {
        insertInto(relativePos,
                   oldParagraph.fontStarts,
                   oldParagraph.fonts.size());
    }
    return oldParagraph;
}

/**
 * Create a new StyledParagraph over the given styled text.
 * @param aci an iterator over the text
 * @param chars the characters extracted from aci
 */
public StyledParagraph(AttributedCharacterIterator aci,
                       char[] chars) {

    int start = aci.getBeginIndex();
    int end = aci.getEndIndex();
    length = end - start;

    int index = start;
    aci.first();

    do {
        final int nextRunStart = aci.getRunLimit();
        final int localIndex = index-start;

        Map<? extends Attribute, ?> attributes = aci.getAttributes();
        attributes = addInputMethodAttrs(attributes);
        Decoration d = Decoration.getDecoration(attributes);
        addDecoration(d, localIndex);

        Object f = getGraphicOrFont(attributes);
        if (f == null) {
            addFonts(chars, attributes, localIndex, nextRunStart-start);
        }
        else {
            addFont(f, localIndex);
        }

        aci.setIndex(nextRunStart);
        index = nextRunStart;

    } while (index < end);

    // Add extra entries to starts arrays with the length
    // of the paragraph.  'this' is used as a dummy value
    // in the Vector.
    if (decorations != null) {
        decorationStarts = addToVector(this, length, decorations, decorationStarts);
    }
    if (fonts != null) {
        fontStarts = addToVector(this, length, fonts, fontStarts);
    }
}

public AttributedCharacterIterator getSelectedText(Attribute[] attributes) {
    InputMethodRequests req = getClientInputMethodRequests();
    if(req != null) {
        return req.getSelectedText(attributes);
    }

    // we don't have access to the client component's text.
    return EMPTY_TEXT;
}

AttributedCharacterIterator formatToCharacterIterator(Object obj, Unit unit) {
    if (!(obj instanceof Number))
        throw new IllegalArgumentException();
    Number number = (Number) obj;
    StringBuffer text = new StringBuffer();
    unit.writePrefix(text);
    attributes.clear();
    if (obj instanceof BigInteger) {
        format((BigInteger) number, text, new FieldPosition(0), true);
    } else if (obj instanceof java.math.BigDecimal) {
        format((java.math.BigDecimal) number, text, new FieldPosition(0)
                      , true);
    } else if (obj instanceof Double) {
        format(number.doubleValue(), text, new FieldPosition(0), true);
    } else if (obj instanceof Integer || obj instanceof Long) {
        format(number.longValue(), text, new FieldPosition(0), true);
    } else {
        throw new IllegalArgumentException();
    }
    unit.writeSuffix(text);
    AttributedString as = new AttributedString(text.toString());

    // add NumberFormat field attributes to the AttributedString
    for (int i = 0; i < attributes.size(); i++) {
        FieldPosition pos = attributes.get(i);
        Format.Field attribute = pos.getFieldAttribute();
        as.addAttribute(attribute, attribute, pos.getBeginIndex(), pos.getEndIndex());
    }

    // return the CharacterIterator from AttributedString
    return as.getIterator();
}

public void formatAndAppend(Format formatter, Object arg) {
    if (attributes == null) {
        append(formatter.format(arg));
    } else {
        AttributedCharacterIterator formattedArg = formatter.formatToCharacterIterator(arg);
        int prevLength = length;
        append(formattedArg);
        // Copy all of the attributes from formattedArg to our attributes list.
        formattedArg.first();
        int start = formattedArg.getIndex();  // Should be 0 but might not be.
        int limit = formattedArg.getEndIndex();  // == start + length - prevLength
        int offset = prevLength - start;  // Adjust attribute indexes for the result string.
        while (start < limit) {
            Map<Attribute, Object> map = formattedArg.getAttributes();
            int runLimit = formattedArg.getRunLimit();
            if (map.size() != 0) {
                for (Map.Entry<Attribute, Object> entry : map.entrySet()) {
                   attributes.add(
                       new AttributeAndPosition(
                           entry.getKey(), entry.getValue(),
                           offset + start, offset + runLimit));
                }
            }
            start = runLimit;
            formattedArg.setIndex(start);
        }
    }
}