Examples of java.awt.font.LineBreakMeasurer

java.awt.font.LineBreakMeasurer

styledText be an AttributedCharacterIterator containing at least // one character LineBreakMeasurer measurer = new LineBreakMeasurer(styledText, frc); float wrappingWidth = getSize().width - 15; while (measurer.getPosition() < fStyledText.length()) { TextLayout layout = measurer.nextLayout(wrappingWidth); pen.y += (layout.getAscent()); float dx = layout.isLeftToRight() ? 0 : (wrappingWidth - layout.getAdvance()); layout.draw(graphics, pen.x + dx, pen.y); pen.y += layout.getDescent() + layout.getLeading(); } }

Rendering text with tabs. For simplicity, the overall text direction is assumed to be left-to-right

 public void paint(Graphics graphics) { float leftMargin = 10, rightMargin = 310; float[] tabStops = { 100, 250 }; // assume styledText is an AttributedCharacterIterator, and the number // of tabs in styledText is tabCount int[] tabLocations = new int[tabCount+1]; int i = 0; for (char c = styledText.first(); c != styledText.DONE; c = styledText.next()) { if (c == '\t') { tabLocations[i++] = styledText.getIndex(); } } tabLocations[tabCount] = styledText.getEndIndex() - 1; // Now tabLocations has an entry for every tab's offset in // the text.  For convenience, the last entry is tabLocations // is the offset of the last character in the text. LineBreakMeasurer measurer = new LineBreakMeasurer(styledText); int currentTab = 0; float verticalPos = 20; while (measurer.getPosition() < styledText.getEndIndex()) { // Lay out and draw each line.  All segments on a line // must be computed before any drawing can occur, since // we must know the largest ascent on the line. // TextLayouts are computed and stored in a Vector; // their horizontal positions are stored in a parallel // Vector. // lineContainsText is true after first segment is drawn boolean lineContainsText = false; boolean lineComplete = false; float maxAscent = 0, maxDescent = 0; float horizontalPos = leftMargin; Vector layouts = new Vector(1); Vector penPositions = new Vector(1); while (!lineComplete) { float wrappingWidth = rightMargin - horizontalPos; TextLayout layout = measurer.nextLayout(wrappingWidth, tabLocations[currentTab]+1, lineContainsText); // layout can be null if lineContainsText is true if (layout != null) { layouts.addElement(layout); penPositions.addElement(new Float(horizontalPos)); horizontalPos += layout.getAdvance(); maxAscent = Math.max(maxAscent, layout.getAscent()); maxDescent = Math.max(maxDescent, layout.getDescent() + layout.getLeading()); } else { lineComplete = true; } lineContainsText = true; if (measurer.getPosition() == tabLocations[currentTab]+1) { currentTab++; } if (measurer.getPosition() == styledText.getEndIndex()) lineComplete = true; else if (horizontalPos >= tabStops[tabStops.length-1]) lineComplete = true; if (!lineComplete) { // move to next tab stop int j; for (j=0; horizontalPos >= tabStops[j]; j++) {} horizontalPos = tabStops[j]; } } verticalPos += maxAscent; Enumeration layoutEnum = layouts.elements(); Enumeration positionEnum = penPositions.elements(); // now iterate through layouts and draw them while (layoutEnum.hasMoreElements()) { TextLayout nextLayout = (TextLayout) layoutEnum.nextElement(); Float nextPosition = (Float) positionEnum.nextElement(); nextLayout.draw(graphics, nextPosition.floatValue(), verticalPos); } verticalPos += maxDescent; } }

@see TextLayout

    for (String textline : textlines) {
      AttributedString attribText = new AttributedString(textline, styleMap);
      AttributedCharacterIterator iter = attribText.getIterator();
      int textStart = iter.getBeginIndex();
      int textEnd = iter.getEndIndex();
      LineBreakMeasurer measurer = new LineBreakMeasurer(iter,
        fontRenderContext);
      measurer.setPosition(textStart);
      while (measurer.getPosition() < textEnd) {
        TextLayout line = measurer.nextLayout((float) layoutWidth);
        result.addLine(line);
        height += (line.getAscent() + line.getDescent() + line.getLeading());
      }
    }
    result.setSize(layoutWidth, height);

View Full Code Here


        Rectangle2D anchor = _shape.getLogicalAnchor2D();


        float textHeight = 0;
        ArrayList lines = new ArrayList();
        LineBreakMeasurer measurer = new LineBreakMeasurer(it, graphics.getFontRenderContext());
        measurer.setPosition(paragraphStart);
        while (measurer.getPosition() < paragraphEnd) {
            int startIndex = measurer.getPosition();
            int nextBreak = text.indexOf('\n', measurer.getPosition() + 1);


            boolean prStart = text.charAt(startIndex) == '\n';
            if(prStart) measurer.setPosition(startIndex++);


            RichTextRun rt = run.getRichTextRunAt(startIndex == text.length() ? (startIndex-1) : startIndex);
            if(rt == null) {
                logger.log(POILogger.WARN,  "RichTextRun not found at pos" + startIndex + "; text.length: " + text.length());
                break;
            }


            float wrappingWidth = (float)anchor.getWidth() - _shape.getMarginLeft() - _shape.getMarginRight();
            wrappingWidth -= rt.getTextOffset();


            if (_shape.getWordWrap() == TextShape.WrapNone) {
                wrappingWidth = _shape.getSheet().getSlideShow().getPageSize().width;
            }


            TextLayout textLayout = measurer.nextLayout(wrappingWidth + 1,
                    nextBreak == -1 ? paragraphEnd : nextBreak, true);
            if (textLayout == null) {
                textLayout = measurer.nextLayout((float)anchor.getWidth(),
                    nextBreak == -1 ? paragraphEnd : nextBreak, false);
            }
            if(textLayout == null){
                logger.log(POILogger.WARN, "Failed to break text into lines: wrappingWidth: "+wrappingWidth+
                        "; text: " + rt.getText());
                measurer.setPosition(rt.getEndIndex());
                continue;
            }
            int endIndex = measurer.getPosition();


            float lineHeight = (float)textLayout.getBounds().getHeight();
            int linespacing = rt.getLineSpacing();
            if(linespacing == 0) linespacing = 100;

View Full Code Here

    for (String textline : textlines) {
      AttributedString attribText = new AttributedString(textline, styleMap);
      AttributedCharacterIterator iter = attribText.getIterator();
      int textStart = iter.getBeginIndex();
      int textEnd = iter.getEndIndex();
      LineBreakMeasurer measurer = new LineBreakMeasurer(iter,
        fontRenderContext);
      measurer.setPosition(textStart);
      while (measurer.getPosition() < textEnd) {
        TextLayout line = measurer.nextLayout((float) layoutWidth);
        result.addLine(line);
        height += (line.getAscent() + line.getDescent() + line.getLeading());
      }
    }
    result.setSize(layoutWidth, height);

View Full Code Here

                    Hashtable map = new Hashtable();
                    map.put(TextAttribute.FONT, (Font) getAttribute("font"));
                    AttributedString as = new AttributedString(currentString, map);
                    AttributedCharacterIterator aci = as.getIterator();


                    LineBreakMeasurer measurer = new LineBreakMeasurer(aci, frc);
                    float wrappingWidth = textBox.width;


                    while (measurer.getPosition() < currentString.length()) {
                        layout = measurer.nextLayout(wrappingWidth);


                        Shape shape = layout.getOutline(oldAT);
                        double deltaScale = textBox.width * oldAT.getScaleX() / shape.getBounds().width;
                        if (1 - deltaScale > 0) {
                            AffineTransform adjust = (AffineTransform) oldAT.clone();

View Full Code Here

        AttributedCharacterIterator it = at.getIterator();
        int paragraphStart = it.getBeginIndex();
        int paragraphEnd = it.getEndIndex();


        List<TextElement> lines = new ArrayList<TextElement>();
        LineBreakMeasurer measurer = new LineBreakMeasurer(it, frc);
        measurer.setPosition(paragraphStart);
        while (measurer.getPosition() < paragraphEnd) {
            int startIndex = measurer.getPosition();
            int nextBreak = text.indexOf('\n', measurer.getPosition() + 1);


            boolean prStart = text.charAt(startIndex) == '\n';
            if(prStart) measurer.setPosition(startIndex++);


            RichTextRun rt = run.getRichTextRunAt(startIndex == text.length() ? (startIndex-1) : startIndex);
            if(rt == null) {
                logger.log(POILogger.WARN,  "RichTextRun not found at pos" + startIndex + "; text.length: " + text.length());
                break;
            }


            float wrappingWidth = textWidth - _shape.getMarginLeft() - _shape.getMarginRight();
            int bulletOffset = rt.getBulletOffset();
            int textOffset = rt.getTextOffset();
            int indent = rt.getIndentLevel();


            TextRulerAtom ruler = run.getTextRuler();
            if(ruler != null) {
                int bullet_val = ruler.getBulletOffsets()[indent]*Shape.POINT_DPI/Shape.MASTER_DPI;
                int text_val = ruler.getTextOffsets()[indent]*Shape.POINT_DPI/Shape.MASTER_DPI;
                if(bullet_val > text_val){
                    int a = bullet_val;
                    bullet_val = text_val;
                    text_val = a;
                }
                if(bullet_val != 0 ) bulletOffset = bullet_val;
                if(text_val != 0) textOffset = text_val;
            }


            if(bulletOffset > 0 || prStart || startIndex == 0) wrappingWidth -= textOffset;


            if (_shape.getWordWrap() == TextShape.WrapNone) {
                wrappingWidth = _shape.getSheet().getSlideShow().getPageSize().width;
            }


            TextLayout textLayout = measurer.nextLayout(wrappingWidth + 1,
                    nextBreak == -1 ? paragraphEnd : nextBreak, true);
            if (textLayout == null) {
                textLayout = measurer.nextLayout(textWidth,
                    nextBreak == -1 ? paragraphEnd : nextBreak, false);
            }
            if(textLayout == null){
                logger.log(POILogger.WARN, "Failed to break text into lines: wrappingWidth: "+wrappingWidth+
                        "; text: " + rt.getText());
                measurer.setPosition(rt.getEndIndex());
                continue;
            }
            int endIndex = measurer.getPosition();


            float lineHeight = (float)textLayout.getBounds().getHeight();
            int linespacing = rt.getLineSpacing();
            if(linespacing == 0) linespacing = 100;

View Full Code Here

        String text = getRenderableText();
        if(text.length() == 0) return _lines;


        AttributedString at = getAttributedString(graphics);
        AttributedCharacterIterator it = at.getIterator();
        LineBreakMeasurer measurer = new LineBreakMeasurer(it, graphics.getFontRenderContext())  ;
        for (;;) {
            int startIndex = measurer.getPosition();


            double wrappingWidth = getWrappingWidth(_lines.size() == 0, graphics) + 1; // add a pixel to compensate rounding errors
            // shape width can be smaller that the sum of insets (this was proved by a test file)
            if(wrappingWidth < 0) wrappingWidth = 1;


            int nextBreak = text.indexOf('\n', startIndex + 1);
            if(nextBreak == -1) nextBreak = it.getEndIndex();


            TextLayout layout = measurer.nextLayout((float)wrappingWidth, nextBreak, true);
            if (layout == null) {
                 // layout can be null if the entire word at the current position
                 // does not fit within the wrapping width. Try with requireNextWord=false.
                 layout = measurer.nextLayout((float)wrappingWidth, nextBreak, false);
            }


            if(layout == null) {
                // exit if can't break any more
                break;
            }


            int endIndex = measurer.getPosition();
            // skip over new line breaks (we paint 'clear' text runs not starting or ending with \n)
            if(endIndex < it.getEndIndex() && text.charAt(endIndex) == '\n'){
                measurer.setPosition(endIndex + 1);
            }


            TextAlign hAlign = getTextAlign();
            if(hAlign == TextAlign.JUSTIFY || hAlign == TextAlign.JUSTIFY_LOW) {
                layout = layout.getJustifiedLayout((float)wrappingWidth);

View Full Code Here

    AttributedCharacterIterator iter = text.getIterator();
    int textStart = iter.getBeginIndex();
    int textEnd = iter.getEndIndex();
    FontRenderContext fr =
      drawingContext.getGraphics2D().getFontRenderContext();
    LineBreakMeasurer measurer = new LineBreakMeasurer(iter, fr);
    measurer.setPosition(textStart);
    double y = getAbsoluteY();
    double textY = y;
    while (measurer.getPosition() < textEnd) {
      TextLayout line = measurer.nextLayout((float) layoutWidth);
      lines.add(line);
      textY += (line.getAscent() + line.getDescent() + line.getLeading());
    }
    setSize(getSize().getWidth(), textY - y);
    setValid(true);

View Full Code Here

    for (String textline : textlines) {
      AttributedString attribText = new AttributedString(textline, styleMap);
      AttributedCharacterIterator iter = attribText.getIterator();
      int textStart = iter.getBeginIndex();
      int textEnd = iter.getEndIndex();
      LineBreakMeasurer measurer = new LineBreakMeasurer(iter,
        fontRenderContext);
      measurer.setPosition(textStart);
      while (measurer.getPosition() < textEnd) {
        TextLayout line = measurer.nextLayout((float) layoutWidth);
        result.addLine(line);
        height += (line.getAscent() + line.getDescent() + line.getLeading());
      }
    }
    result.setSize(layoutWidth, height);

View Full Code Here


        MTextIterator iter = new MTextIterator(fText,
                                               fFontResolver,
                                               paragraphStart,
                                               paragraphLimit);
        LineBreakMeasurer measurer = new LineBreakMeasurer(iter, fFontRenderContext);
        if (fgCacheMeasurers) {
            fCachedMeasurerStart = paragraphStart;
            fCachedMeasurerLimit = paragraphLimit;
            fCachedMeasurer = measurer;
        }

View Full Code Here

        int curParagraphLimit = Integer.MIN_VALUE; // dummy value


        int damageStart = curGraphicStart;


        ParagraphRenderer renderer = null;
        LineBreakMeasurer measurer = null;
        
        // try to use cached LineBreakMeasurer if possible
        if (fCachedMeasurer != null && 
            curParagraphStart == fCachedMeasurerStart) {


            curParagraphLimit = fText.paragraphLimit(curParagraphStart);
            
            try {
                if (newCurTextLen - fLTCurTextLen == 1 && afLength == 1) {
                    if (curParagraphLimit == fCachedMeasurerLimit+1) {
                        MTextIterator iter = new MTextIterator(fText,
                                                               fFontResolver, 
                                                               curParagraphStart,
                                                               curParagraphLimit);
                        fCachedMeasurer.insertChar(iter, afStart);
                        fCachedMeasurerLimit += 1;
                        measurer = fCachedMeasurer;
                    }
                }
                else if (fLTCurTextLen - newCurTextLen == 1 && afLength == 0) {
                    if (fCachedMeasurerLimit > fCachedMeasurerStart + 1 &&
                                curParagraphLimit == fCachedMeasurerLimit-1) {
                        MTextIterator iter = new MTextIterator(fText,
                                                               fFontResolver,
                                                               curParagraphStart,
                                                               curParagraphLimit);
                        fCachedMeasurer.deleteChar(iter, afStart);
                        fCachedMeasurerLimit -= 1;
                        measurer = fCachedMeasurer;
                    }
                }
            }
            catch(ArrayIndexOutOfBoundsException e) {
                fCachedMeasurer = null;
                fgCacheMeasurers = false;
            }
            
            if (measurer != null) {
                // need to set up renderer since the paragraph update in the
                // formatting loop will not happen
                AttributeMap style = fText.paragraphStyleAt(curParagraphStart);
                renderer = getRendererFor(style);
                measurer.setPosition(curLineStart);
            }
        }
        
        if (measurer == null) {
            // trigger paragraph update at start of formatting loop
            curParagraphLimit = curParagraphStart;
            curParagraphStart = 0;
        }


        fLTCurTextLen = newCurTextLen;
        
        while (true) {
            // System.out.println("line: " + fLTPosEnd + ", cls: " + curLineStart);




            if (curLineStart >= curParagraphLimit) {
                curParagraphStart = curParagraphLimit;
                curParagraphLimit = fText.paragraphLimit(curParagraphStart);


                AttributeMap style = fText.paragraphStyleAt(curParagraphStart);
                renderer = getRendererFor(style);


                if (curParagraphStart < curParagraphLimit) {
                    measurer = makeMeasurer(curParagraphStart, curParagraphLimit);
                    measurer.setPosition(curLineStart);
                }
                else {
                    measurer = null;
                }
            }

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