Examples of org.apache.batik.gvt.text.TextSpanLayout

Class that performs layout of attributed text strings into glyph sets paintable by TextPainter instances. Similar to java.awt.font.TextLayout in function and purpose. Note that while this utility interface is provided for the convenience of TextPainter implementations, conforming TextPainters are not required to use this class. @see java.awt.font.TextLayout @see org.apache.batik.gvt.TextPainter @author

        // get the list of text runs
        List textRuns = getTextRuns(textNode, aci);
        Iterator trI = textRuns.iterator();
        int startGlyphIndex = -1;
        int endGlyphIndex = -1;
        TextSpanLayout startLayout=null, endLayout=null;
        while (trI.hasNext()) {
            TextRun tr = (TextRun)trI.next();
            TextSpanLayout tsl = tr.getLayout();
            if (startGlyphIndex == -1) {
                startGlyphIndex  = tsl.getGlyphIndex(result[0]);
                if (startGlyphIndex != -1)
                    startLayout = tsl;
            }
                
            if (endGlyphIndex == -1) {
                endGlyphIndex = tsl.getGlyphIndex(result[1]);
                if (endGlyphIndex != -1)
                    endLayout = tsl;
            }
            if ((startGlyphIndex != -1) && (endGlyphIndex != -1))
                break;

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        // for each text run, append any highlight it may contain for
        // the current selection
        for (int i = 0; i < textRuns.size(); ++i) {
            TextRun textRun = (TextRun)textRuns.get(i);
            TextSpanLayout layout = textRun.getLayout();


            Shape layoutHighlightedShape = layout.getHighlightShape
                (beginIndex, endIndex);


            // append the highlighted shape of this layout to the
            // overall hightlighted shape
            if (( layoutHighlightedShape != null) &&

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                if (list != null){
                    for (int i = 0 ; i < list.size(); i++) {
                        StrokingTextPainter.TextRun run =
                            (StrokingTextPainter.TextRun)list.get(i);
                        AttributedCharacterIterator aci = run.getACI();
                        TextSpanLayout layout = run.getLayout();
                        float x = (float)coords.getX();
                        float y = (float)coords.getY();
                        TextHit textHit = layout.hitTestChar(x, y);
                        if (textHit != null && layout.getBounds2D().contains(x, y)) {
                            Object delimiter = aci.getAttribute
                                (GVTAttributedCharacterIterator.TextAttribute.TEXT_COMPOUND_DELIMITER);
                            if (delimiter instanceof Element) {
                                return (Element)delimiter;
                            }

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                inChunk = (isChunkStart) || (fx == null) || (fx.isNaN());
                if (inChunk) {
                    Point2D offset = new Point2D.Float(
                       (float) (location.getX()+advance.getX()),
                       (float) (location.getY()+advance.getY()));
                    TextSpanLayout layout = getTextLayoutFactory().
                                       createTextLayout(runaci, offset, frc);
                    if (layout.isVertical()) {
                        runaci = createModifiedACIForVerticalLayout(runaci);
                    }
                    TextRun run = new TextRun(layout, runaci);
                    textRuns.add(run);
                    Point2D layoutAdvance = layout.getAdvance2D();
                    advance = new Point2D.Float(
                       (float) (advance.getX()+layoutAdvance.getX()),
                       (float) (advance.getY()+layoutAdvance.getY()));
                    ++endChunk;
                    if (aci.setIndex(end) == CharacterIterator.DONE) break;

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                break;
            default:
                // leave untouched
            }


            TextSpanLayout layout = r.getLayout();
            Point2D offset = layout.getOffset();


            if (layout.isVertical()) {
                layout.setOffset(new Point2D.Float(
                                     (float) offset.getX(),
                                     (float) offset.getY()+dy));
            } else {
                //System.out.println("offset "+offset+" shift "+dx);
                layout.setOffset(new Point2D.Float(
                                    (float) offset.getX()+dx,
                                    (float) offset.getY()));
            }
        }
    }

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    private void paintTextRun(TextRun textRun, Graphics2D g2d,
                           GraphicsNodeRenderContext context) {


        AttributedCharacterIterator runaci = textRun.getACI();
        TextSpanLayout layout = textRun.getLayout();
        runaci.first();


        Composite opacity = (Composite)
                  runaci.getAttribute(GVTAttributedCharacterIterator.
                                              TextAttribute.OPACITY);
        if (opacity != null) {
            g2d.setComposite(opacity);
        }


        boolean underline =
            (runaci.getAttribute(GVTAttributedCharacterIterator.
                                 TextAttribute.UNDERLINE) != null);


        // paint over-and-underlines first, then layer glyphs over them


        if (underline && !layout.isVertical()) {
            paintUnderline(textRun, g2d);
        }
        boolean overline =
            (runaci.getAttribute(GVTAttributedCharacterIterator.
                                 TextAttribute.OVERLINE) != null);


        if (overline && !layout.isVertical()) {
            paintOverline(textRun, g2d);
        }


        layout.draw(g2d, context);


        boolean strikethrough =
            (runaci.getAttribute(GVTAttributedCharacterIterator.
                TextAttribute.STRIKETHROUGH) ==
                    GVTAttributedCharacterIterator.
                        TextAttribute.STRIKETHROUGH_ON);
        // paint strikethrough last
        if (strikethrough && !layout.isVertical()) {
            paintStrikethrough(textRun, g2d);
        }
    }

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    /**
     * Paints the overline for a given ACI.
     */
    private void paintOverline(TextRun textRun, Graphics2D g2d) {
        AttributedCharacterIterator runaci = textRun.getACI();
        TextSpanLayout layout = textRun.getLayout();
        java.awt.Shape overlineShape =
                layout.getDecorationOutline(
                           TextSpanLayout.DECORATION_OVERLINE);


        Paint paint = (Paint) runaci.getAttribute(
            TextAttribute.FOREGROUND);
        if (paint != null) {

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     * the underline fill and stroke to differ from that of the text glyphs.
     */
    private void paintUnderline(TextRun textRun, Graphics2D g2d) {


        AttributedCharacterIterator runaci = textRun.getACI();
        TextSpanLayout layout = textRun.getLayout();


        Shape underlineShape = layout.getDecorationOutline(
                           TextSpanLayout.DECORATION_UNDERLINE);


        // TODO: change getAdvance to getVisibleAdvance for
        // ACIs which do not inherit their underline attribute
        // (not sure how to implement this yet)

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     * internal strikethrough but computes it manually.
     */
    private void paintStrikethrough(TextRun textRun, Graphics2D g2d) {


        AttributedCharacterIterator runaci = textRun.getACI();
        TextSpanLayout layout = textRun.getLayout();


        java.awt.Shape strikethroughShape =
                layout.getDecorationOutline(
                           TextSpanLayout.DECORATION_STRIKETHROUGH);


        Paint paint = (Paint) runaci.getAttribute(
            TextAttribute.FOREGROUND);
        if (paint != null) {

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        node.setTextRuns(textRuns);


        // for each text run, see if its been hit
        for (int i = 0; i < textRuns.size(); ++i) {
            TextRun textRun = (TextRun)textRuns.get(i);
            TextSpanLayout layout = textRun.getLayout();
            TextHit textHit = layout.hitTestChar((float) x, (float) y);
            if (textHit != null && layout.getBounds().contains(x,y)) {
                textHit.setTextNode(node);
                textHit.setFontRenderContext(frc);
                cachedMark = new BasicTextPainter.Mark(x, y, layout, textHit);
                cachedNode = node;
                return cachedMark;

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Examples of org.apache.batik.gvt.text.TextSpanLayout

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