Java Code Examples for java.awt.Font#getLineMetrics()

/**
 * A utility method that draws a string inside a rectangle.
 *
 * @param g2  the graphics device.
 * @param bounds  the rectangle.
 * @param font  the font.
 * @param text  the text.
 */
private void drawStringInRect(Graphics2D g2, Rectangle2D bounds, Font font,
                              String text) {

    g2.setFont(font);
    FontMetrics fm = g2.getFontMetrics(font);
    Rectangle2D r = TextUtilities.getTextBounds(text, g2, fm);
    double x = bounds.getX();
    if (r.getWidth() < bounds.getWidth()) {
        x = x + (bounds.getWidth() - r.getWidth()) / 2;
    }
    LineMetrics metrics = font.getLineMetrics(
        text, g2.getFontRenderContext()
    );
    g2.drawString(
        text, (float) x, (float) (bounds.getMaxY()
            - this.bottomInnerGap - metrics.getDescent())
    );
}
 

private void fastInit(char[] chars, Font font,
                      Map<? extends Attribute, ?> attrs,
                      FontRenderContext frc) {

    // Object vf = attrs.get(TextAttribute.ORIENTATION);
    // isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf);
    isVerticalLine = false;

    LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc);
    CoreMetrics cm = CoreMetrics.get(lm);
    byte glyphBaseline = (byte) cm.baselineIndex;

    if (attrs == null) {
        baseline = glyphBaseline;
        baselineOffsets = cm.baselineOffsets;
        justifyRatio = 1.0f;
    } else {
        paragraphInit(glyphBaseline, cm, attrs, chars);
    }

    characterCount = chars.length;

    textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs);
}
 

private void fastInit(char[] chars, Font font,
                      Map<? extends Attribute, ?> attrs,
                      FontRenderContext frc) {

    // Object vf = attrs.get(TextAttribute.ORIENTATION);
    // isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf);
    isVerticalLine = false;

    LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc);
    CoreMetrics cm = CoreMetrics.get(lm);
    byte glyphBaseline = (byte) cm.baselineIndex;

    if (attrs == null) {
        baseline = glyphBaseline;
        baselineOffsets = cm.baselineOffsets;
        justifyRatio = 1.0f;
    } else {
        paragraphInit(glyphBaseline, cm, attrs, chars);
    }

    characterCount = chars.length;

    textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs);
}
 

private void fastInit(char[] chars, Font font,
                      Map<? extends Attribute, ?> attrs,
                      FontRenderContext frc) {

    // Object vf = attrs.get(TextAttribute.ORIENTATION);
    // isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf);
    isVerticalLine = false;

    LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc);
    CoreMetrics cm = CoreMetrics.get(lm);
    byte glyphBaseline = (byte) cm.baselineIndex;

    if (attrs == null) {
        baseline = glyphBaseline;
        baselineOffsets = cm.baselineOffsets;
        justifyRatio = 1.0f;
    } else {
        paragraphInit(glyphBaseline, cm, attrs, chars);
    }

    characterCount = chars.length;

    textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs);
}
 

private void fastInit(char[] chars, Font font,
                      Map<? extends Attribute, ?> attrs,
                      FontRenderContext frc) {

    // Object vf = attrs.get(TextAttribute.ORIENTATION);
    // isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf);
    isVerticalLine = false;

    LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc);
    CoreMetrics cm = CoreMetrics.get(lm);
    byte glyphBaseline = (byte) cm.baselineIndex;

    if (attrs == null) {
        baseline = glyphBaseline;
        baselineOffsets = cm.baselineOffsets;
        justifyRatio = 1.0f;
    } else {
        paragraphInit(glyphBaseline, cm, attrs, chars);
    }

    characterCount = chars.length;

    textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs);
}
 

private void fastInit(char[] chars, Font font,
                      Map<? extends Attribute, ?> attrs,
                      FontRenderContext frc) {

    // Object vf = attrs.get(TextAttribute.ORIENTATION);
    // isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf);
    isVerticalLine = false;

    LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc);
    CoreMetrics cm = CoreMetrics.get(lm);
    byte glyphBaseline = (byte) cm.baselineIndex;

    if (attrs == null) {
        baseline = glyphBaseline;
        baselineOffsets = cm.baselineOffsets;
        justifyRatio = 1.0f;
    } else {
        paragraphInit(glyphBaseline, cm, attrs, chars);
    }

    characterCount = chars.length;

    textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs);
}
 

/**
 * A utility method for determining the width of the widest tick label.
 *
 * @param ticks  the ticks.
 * @param g2  the graphics device.
 * @param drawArea  the area within which the plot and axes should be drawn.
 * @param vertical  a flag that indicates whether or not the tick labels
 *                  are 'vertical'.
 *
 * @return The width of the tallest tick label.
 */
protected double findMaximumTickLabelWidth(List ticks, Graphics2D g2,
        Rectangle2D drawArea, boolean vertical) {

    RectangleInsets insets = getTickLabelInsets();
    Font font = getTickLabelFont();
    double maxWidth = 0.0;
    if (!vertical) {
        FontMetrics fm = g2.getFontMetrics(font);
        Iterator iterator = ticks.iterator();
        while (iterator.hasNext()) {
            Tick tick = (Tick) iterator.next();
            Rectangle2D labelBounds = null;
            if (tick instanceof LogTick) {
                LogTick lt = (LogTick) tick;
                if (lt.getAttributedLabel() != null) {
                    labelBounds = AttrStringUtils.getTextBounds(
                            lt.getAttributedLabel(), g2);
                }
            } else if (tick.getText() != null) {
                labelBounds = TextUtilities.getTextBounds(tick.getText(), 
                        g2, fm);
            }
            if (labelBounds != null 
                    && labelBounds.getWidth() + insets.getLeft()
                    + insets.getRight() > maxWidth) {
                maxWidth = labelBounds.getWidth()
                           + insets.getLeft() + insets.getRight();
            }
        }
    } else {
        LineMetrics metrics = font.getLineMetrics("ABCxyz",
                g2.getFontRenderContext());
        maxWidth = metrics.getHeight()
                   + insets.getTop() + insets.getBottom();
    }
    return maxWidth;

}
 

/**
 * Estimates the maximum width of the tick labels, assuming the specified
 * tick unit is used.
 * <P>
 * Rather than computing the string bounds of every tick on the axis, we
 * just look at two values: the lower bound and the upper bound for the
 * axis.  These two values will usually be representative.
 *
 * @param g2  the graphics device.
 * @param unit  the tick unit to use for calculation.
 *
 * @return The estimated maximum width of the tick labels.
 */
private double estimateMaximumTickLabelWidth(Graphics2D g2, 
        DateTickUnit unit) {

    RectangleInsets tickLabelInsets = getTickLabelInsets();
    double result = tickLabelInsets.getLeft() + tickLabelInsets.getRight();

    Font tickLabelFont = getTickLabelFont();
    FontRenderContext frc = g2.getFontRenderContext();
    LineMetrics lm = tickLabelFont.getLineMetrics("ABCxyz", frc);
    if (isVerticalTickLabels()) {
        // all tick labels have the same width (equal to the height of
        // the font)...
        result += lm.getHeight();
    }
    else {
        // look at lower and upper bounds...
        DateRange range = (DateRange) getRange();
        Date lower = range.getLowerDate();
        Date upper = range.getUpperDate();
        String lowerStr, upperStr;
        DateFormat formatter = getDateFormatOverride();
        if (formatter != null) {
            lowerStr = formatter.format(lower);
            upperStr = formatter.format(upper);
        }
        else {
            lowerStr = unit.dateToString(lower);
            upperStr = unit.dateToString(upper);
        }
        FontMetrics fm = g2.getFontMetrics(tickLabelFont);
        double w1 = fm.stringWidth(lowerStr);
        double w2 = fm.stringWidth(upperStr);
        result += Math.max(w1, w2);
    }

    return result;

}
 

/**
 * Estimates the maximum width of the tick labels, assuming the specified 
 * tick unit is used.
 * <P>
 * Rather than computing the string bounds of every tick on the axis, we
 * just look at two values: the lower bound and the upper bound for the 
 * axis.  These two values will usually be representative.
 *
 * @param g2  the graphics device.
 * @param unit  the tick unit to use for calculation.
 *
 * @return The estimated maximum width of the tick labels.
 */
private double estimateMaximumTickLabelWidth(Graphics2D g2, 
                                             DateTickUnit unit) {

    RectangleInsets tickLabelInsets = getTickLabelInsets();
    double result = tickLabelInsets.getLeft() + tickLabelInsets.getRight();

    Font tickLabelFont = getTickLabelFont();
    FontRenderContext frc = g2.getFontRenderContext();
    LineMetrics lm = tickLabelFont.getLineMetrics("ABCxyz", frc);
    if (isVerticalTickLabels()) {
        // all tick labels have the same width (equal to the height of 
        // the font)...
        result += lm.getHeight();
    }
    else {
        // look at lower and upper bounds...
        DateRange range = (DateRange) getRange();
        Date lower = range.getLowerDate();
        Date upper = range.getUpperDate();
        String lowerStr = null;
        String upperStr = null;
        DateFormat formatter = getDateFormatOverride();
        if (formatter != null) {
            lowerStr = formatter.format(lower);
            upperStr = formatter.format(upper);
        }
        else {
            lowerStr = unit.dateToString(lower);
            upperStr = unit.dateToString(upper);
        }
        FontMetrics fm = g2.getFontMetrics(tickLabelFont);
        double w1 = fm.stringWidth(lowerStr);
        double w2 = fm.stringWidth(upperStr);
        result += Math.max(w1, w2);
    }

    return result;

}
 

/**
 * A utility method for determining the width of the widest tick label.
 *
 * @param ticks  the ticks.
 * @param g2  the graphics device.
 * @param drawArea  the area within which the plot and axes should be drawn.
 * @param vertical  a flag that indicates whether or not the tick labels
 *                  are 'vertical'.
 *
 * @return The width of the tallest tick label.
 */
protected double findMaximumTickLabelWidth(List ticks, Graphics2D g2,
        Rectangle2D drawArea, boolean vertical) {

    RectangleInsets insets = getTickLabelInsets();
    Font font = getTickLabelFont();
    double maxWidth = 0.0;
    if (!vertical) {
        FontMetrics fm = g2.getFontMetrics(font);
        Iterator iterator = ticks.iterator();
        while (iterator.hasNext()) {
            Tick tick = (Tick) iterator.next();
            Rectangle2D labelBounds = null;
            if (tick instanceof LogTick) {
                LogTick lt = (LogTick) tick;
                if (lt.getAttributedLabel() != null) {
                    labelBounds = AttrStringUtils.getTextBounds(
                            lt.getAttributedLabel(), g2);
                }
            } else if (tick.getText() != null) {
                labelBounds = TextUtilities.getTextBounds(tick.getText(), 
                        g2, fm);
            }
            if (labelBounds != null 
                    && labelBounds.getWidth() + insets.getLeft()
                    + insets.getRight() > maxWidth) {
                maxWidth = labelBounds.getWidth()
                           + insets.getLeft() + insets.getRight();
            }
        }
    } else {
        LineMetrics metrics = font.getLineMetrics("ABCxyz",
                g2.getFontRenderContext());
        maxWidth = metrics.getHeight()
                   + insets.getTop() + insets.getBottom();
    }
    return maxWidth;

}
 

public static void main(String[] args) throws Exception
{
    // The bug only happens with Type 1 fonts. The Ghostscript font files
    // should be commonly available. From distro pacakge or
    //  ftp://ftp.gnu.org/gnu/ghostscript/gnu-gs-fonts-other-6.0.tar.gz
    // Pass pfa/pfb font file as argument
    String path = args[0];

    // Load
    InputStream stream = new FileInputStream(path);
    Font font = Font.createFont(Font.TYPE1_FONT,stream);

    // Ensure native bits have been generated
    BufferedImage img = new BufferedImage(100,100,
                             BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2d = img.createGraphics();
    FontRenderContext frc = g2d.getFontRenderContext();

    font.getLineMetrics("derp",frc);

    // Force disposal -
    // System.gc() is not sufficient.
    Field font2DHandleField = Font.class.getDeclaredField("font2DHandle");
    font2DHandleField.setAccessible(true);
    sun.font.Font2DHandle font2DHandle =
                  (sun.font.Font2DHandle)font2DHandleField.get(font);

    sun.font.Font2D font2D = font2DHandle.font2D;
    sun.font.Type1Font type1Font = (sun.font.Type1Font)font2D;

    Method getScalerMethod =
    sun.font.Type1Font.class.getDeclaredMethod("getScaler");
    getScalerMethod.setAccessible(true);
    sun.font.FontScaler scaler =
              (sun.font.FontScaler)getScalerMethod.invoke(type1Font);

    // dispose should not crash due to double free
    scaler.dispose();
}
 

/**
 * Returns an array in logical order of the TextLineComponents on
 * the text in the given range, with the given attributes.
 */
public static TextLineComponent[] createComponentsOnRun(int runStart,
                                                        int runLimit,
                                                        char[] chars,
                                                        int[] charsLtoV,
                                                        byte[] levels,
                                                        TextLabelFactory factory,
                                                        Font font,
                                                        CoreMetrics cm,
                                                        FontRenderContext frc,
                                                        Decoration decorator,
                                                        TextLineComponent[] components,
                                                        int numComponents) {

    int pos = runStart;
    do {
        int chunkLimit = firstVisualChunk(charsLtoV, levels, pos, runLimit); // <= displayLimit

        do {
            int startPos = pos;
            int lmCount;

            if (cm == null) {
                LineMetrics lineMetrics = font.getLineMetrics(chars, startPos, chunkLimit, frc);
                cm = CoreMetrics.get(lineMetrics);
                lmCount = lineMetrics.getNumChars();
            }
            else {
                lmCount = (chunkLimit-startPos);
            }

            TextLineComponent nextComponent =
                factory.createExtended(font, cm, decorator, startPos, startPos + lmCount);

            ++numComponents;
            if (numComponents >= components.length) {
                components = expandArray(components);
            }

            components[numComponents-1] = nextComponent;

            pos += lmCount;
        } while (pos < chunkLimit);

    } while (pos < runLimit);

    return components;
}
 

/**
 * Returns an array in logical order of the TextLineComponents on
 * the text in the given range, with the given attributes.
 */
public static TextLineComponent[] createComponentsOnRun(int runStart,
                                                        int runLimit,
                                                        char[] chars,
                                                        int[] charsLtoV,
                                                        byte[] levels,
                                                        TextLabelFactory factory,
                                                        Font font,
                                                        CoreMetrics cm,
                                                        FontRenderContext frc,
                                                        Decoration decorator,
                                                        TextLineComponent[] components,
                                                        int numComponents) {

    int pos = runStart;
    do {
        int chunkLimit = firstVisualChunk(charsLtoV, levels, pos, runLimit); // <= displayLimit

        do {
            int startPos = pos;
            int lmCount;

            if (cm == null) {
                LineMetrics lineMetrics = font.getLineMetrics(chars, startPos, chunkLimit, frc);
                cm = CoreMetrics.get(lineMetrics);
                lmCount = lineMetrics.getNumChars();
            }
            else {
                lmCount = (chunkLimit-startPos);
            }

            TextLineComponent nextComponent =
                factory.createExtended(font, cm, decorator, startPos, startPos + lmCount);

            ++numComponents;
            if (numComponents >= components.length) {
                components = expandArray(components);
            }

            components[numComponents-1] = nextComponent;

            pos += lmCount;
        } while (pos < chunkLimit);

    } while (pos < runLimit);

    return components;
}
 

protected float determineLeading(Font font)
{
	LineMetrics lineMetrics = font.getLineMetrics(" ", context.getFontRenderContext());
	return lineMetrics.getLeading();
}
 

/**
   * Create a simple implementation of a TextSource.
   *
   * Chars is an array containing clen chars in the context, in
   * logical order, contiguously starting at cstart.  Start and len
   * represent that portion of the context representing the true
   * source; start, like cstart, is relative to the start of the
   * character array.
   *
   * Level is the bidi level (0-63 for the entire context. Flags is
   * the layout flags. Font is the font, frc is the render context,
   * and lm is the line metrics for the entire source text, but not
   * necessarily the context.
   */
  StandardTextSource(char[] chars,
                     int start,
                     int len,
                     int cstart,
                     int clen,
                     int level,
                     int flags,
                     Font font,
                     FontRenderContext frc,
                     CoreMetrics cm) {
  if (chars == null) {
    throw new IllegalArgumentException("bad chars: null");
  }
  if (cstart < 0) {
    throw new IllegalArgumentException("bad cstart: " + cstart);
  }
  if (start < cstart) {
    throw new IllegalArgumentException("bad start: " + start + " for cstart: " + cstart);
  }
  if (clen < 0) {
    throw new IllegalArgumentException("bad clen: " + clen);
  }
  if (cstart + clen > chars.length) {
    throw new IllegalArgumentException("bad clen: " + clen + " cstart: " + cstart + " for array len: " + chars.length);
  }
  if (len < 0) {
    throw new IllegalArgumentException("bad len: " + len);
  }
  if ((start + len) > (cstart + clen)) {
    throw new IllegalArgumentException("bad len: " + len + " start: " + start + " for cstart: " + cstart + " clen: " + clen);
  }
  if (font == null) {
    throw new IllegalArgumentException("bad font: null");
  }
  if (frc == null) {
    throw new IllegalArgumentException("bad frc: null");
  }

  this.chars = chars;
  this.start = start;
  this.len = len;
  this.cstart = cstart;
  this.clen = clen;
  this.level = level;
  this.flags = flags;
  this.font = font;
  this.frc = frc;

  if (cm != null) {
      this.cm = cm;
  } else {
      LineMetrics metrics = font.getLineMetrics(chars, cstart, clen, frc);
      this.cm = ((FontLineMetrics)metrics).cm;
  }
}
 

/**
 * Returns an array in logical order of the TextLineComponents on
 * the text in the given range, with the given attributes.
 */
public static TextLineComponent[] createComponentsOnRun(int runStart,
                                                        int runLimit,
                                                        char[] chars,
                                                        int[] charsLtoV,
                                                        byte[] levels,
                                                        TextLabelFactory factory,
                                                        Font font,
                                                        CoreMetrics cm,
                                                        FontRenderContext frc,
                                                        Decoration decorator,
                                                        TextLineComponent[] components,
                                                        int numComponents) {

    int pos = runStart;
    do {
        int chunkLimit = firstVisualChunk(charsLtoV, levels, pos, runLimit); // <= displayLimit

        do {
            int startPos = pos;
            int lmCount;

            if (cm == null) {
                LineMetrics lineMetrics = font.getLineMetrics(chars, startPos, chunkLimit, frc);
                cm = CoreMetrics.get(lineMetrics);
                lmCount = lineMetrics.getNumChars();
            }
            else {
                lmCount = (chunkLimit-startPos);
            }

            TextLineComponent nextComponent =
                factory.createExtended(font, cm, decorator, startPos, startPos + lmCount);

            ++numComponents;
            if (numComponents >= components.length) {
                components = expandArray(components);
            }

            components[numComponents-1] = nextComponent;

            pos += lmCount;
        } while (pos < chunkLimit);

    } while (pos < runLimit);

    return components;
}
 

/**
 * A utility method that calculates the anchor offsets for a string.
 * Normally, the (x, y) coordinate for drawing text is a point on the
 * baseline at the left of the text string.  If you add these offsets to
 * (x, y) and draw the string, then the anchor point should coincide with
 * the (x, y) point.
 *
 * @param g2  the graphics device (not <code>null</code>).
 * @param text  the text.
 * @param anchor  the anchor point.
 * @param textBounds  the text bounds (if not <code>null</code>, this
 *                    object will be updated by this method to match the
 *                    string bounds).
 *
 * @return  The offsets.
 */
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
        String text, TextAnchor anchor, Rectangle2D textBounds) {

    float[] result = new float[3];
    FontRenderContext frc = g2.getFontRenderContext();
    Font f = g2.getFont();
    FontMetrics fm = g2.getFontMetrics(f);
    Rectangle2D bounds = TextUtilities.getTextBounds(text, g2, fm);
    LineMetrics metrics = f.getLineMetrics(text, frc);
    float ascent = metrics.getAscent();
    result[2] = -ascent;
    float halfAscent = ascent / 2.0f;
    float descent = metrics.getDescent();
    float leading = metrics.getLeading();
    float xAdj = 0.0f;
    float yAdj = 0.0f;

    if (anchor.isHorizontalCenter()) {
        xAdj = (float) -bounds.getWidth() / 2.0f;
    }
    else if (anchor.isRight()) {
        xAdj = (float) -bounds.getWidth();
    }

    if (anchor.isTop()) {
        yAdj = -descent - leading + (float) bounds.getHeight();
    }
    else if (anchor.isHalfAscent()) {
        yAdj = halfAscent;
    }
    else if (anchor.isVerticalCenter()) {
        yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
    }
    else if (anchor.isBaseline()) {
        yAdj = 0.0f;
    }
    else if (anchor.isBottom()) {
        yAdj = -metrics.getDescent() - metrics.getLeading();
    }
    if (textBounds != null) {
        textBounds.setRect(bounds);
    }
    result[0] = xAdj;
    result[1] = yAdj;
    return result;

}
 

/**
 * A utility method that calculates the anchor offsets for a string.
 * Normally, the (x, y) coordinate for drawing text is a point on the
 * baseline at the left of the text string.  If you add these offsets to
 * (x, y) and draw the string, then the anchor point should coincide with
 * the (x, y) point.
 *
 * @param g2  the graphics device (not <code>null</code>).
 * @param text  the text.
 * @param anchor  the anchor point.
 *
 * @return  The offsets.
 */
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
        String text, TextAnchor anchor) {

    float[] result = new float[2];
    FontRenderContext frc = g2.getFontRenderContext();
    Font f = g2.getFont();
    FontMetrics fm = g2.getFontMetrics(f);
    Rectangle2D bounds = getTextBounds(text, fm);
    LineMetrics metrics = f.getLineMetrics(text, frc);
    float ascent = metrics.getAscent();
    float halfAscent = ascent / 2.0f;
    float descent = metrics.getDescent();
    float leading = metrics.getLeading();
    float xAdj = 0.0f;
    float yAdj = 0.0f;

    if (anchor.isHorizontalCenter()) {
        xAdj = (float) -bounds.getWidth() / 2.0f;
    }
    else if (anchor.isRight()) {
        xAdj = (float) -bounds.getWidth();
    }

    if (anchor.isTop()) {
        yAdj = -descent - leading + (float) bounds.getHeight();
    }
    else if (anchor.isHalfAscent()) {
        yAdj = halfAscent;
    }
    else if (anchor.isVerticalCenter()) {
        yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);
    }
    else if (anchor.isBaseline()) {
        yAdj = 0.0f;
    }
    else if (anchor.isBottom()) {
        yAdj = -metrics.getDescent() - metrics.getLeading();
    }
    result[0] = xAdj;
    result[1] = yAdj;
    return result;

}
 

/**
   * Create a simple implementation of a TextSource.
   *
   * Chars is an array containing clen chars in the context, in
   * logical order, contiguously starting at cstart.  Start and len
   * represent that portion of the context representing the true
   * source; start, like cstart, is relative to the start of the
   * character array.
   *
   * Level is the bidi level (0-63 for the entire context. Flags is
   * the layout flags. Font is the font, frc is the render context,
   * and lm is the line metrics for the entire source text, but not
   * necessarily the context.
   */
  StandardTextSource(char[] chars,
                     int start,
                     int len,
                     int cstart,
                     int clen,
                     int level,
                     int flags,
                     Font font,
                     FontRenderContext frc,
                     CoreMetrics cm) {
  if (chars == null) {
    throw new IllegalArgumentException("bad chars: null");
  }
  if (cstart < 0) {
    throw new IllegalArgumentException("bad cstart: " + cstart);
  }
  if (start < cstart) {
    throw new IllegalArgumentException("bad start: " + start + " for cstart: " + cstart);
  }
  if (clen < 0) {
    throw new IllegalArgumentException("bad clen: " + clen);
  }
  if (cstart + clen > chars.length) {
    throw new IllegalArgumentException("bad clen: " + clen + " cstart: " + cstart + " for array len: " + chars.length);
  }
  if (len < 0) {
    throw new IllegalArgumentException("bad len: " + len);
  }
  if ((start + len) > (cstart + clen)) {
    throw new IllegalArgumentException("bad len: " + len + " start: " + start + " for cstart: " + cstart + " clen: " + clen);
  }
  if (font == null) {
    throw new IllegalArgumentException("bad font: null");
  }
  if (frc == null) {
    throw new IllegalArgumentException("bad frc: null");
  }

  this.chars = chars;
  this.start = start;
  this.len = len;
  this.cstart = cstart;
  this.clen = clen;
  this.level = level;
  this.flags = flags;
  this.font = font;
  this.frc = frc;

  if (cm != null) {
      this.cm = cm;
  } else {
      LineMetrics metrics = font.getLineMetrics(chars, cstart, clen, frc);
      this.cm = ((FontLineMetrics)metrics).cm;
  }
}
 

/**
 * A utility method that calculates the anchor offsets for a string.
 * Normally, the (x, y) coordinate for drawing text is a point on the
 * baseline at the left of the text string.  If you add these offsets to
 * (x, y) and draw the string, then the anchor point should coincide with
 * the (x, y) point.
 *
 * @param g2  the graphics device (not <code>null</code>).
 * @param text  the text.
 * @param anchor  the anchor point.
 * @param textBounds  the text bounds (if not <code>null</code>, this
 *                    object will be updated by this method to match the
 *                    string bounds).
 *
 * @return  The offsets.
 */
private static float[] deriveTextBoundsAnchorOffsets(Graphics2D g2,
        String text, TextAnchor anchor, Rectangle2D textBounds) {

    float[] result = new float[3];
    FontRenderContext frc = g2.getFontRenderContext();
    Font f = g2.getFont();
    FontMetrics fm = g2.getFontMetrics(f);
    Rectangle2D bounds = TextUtilities.getTextBounds(text, g2, fm);
    LineMetrics metrics = f.getLineMetrics(text, frc);
    float ascent = metrics.getAscent();
    result[2] = -ascent;
    float halfAscent = ascent / 2.0f;
    float descent = metrics.getDescent();
    float leading = metrics.getLeading();
    float xAdj = 0.0f;
    float yAdj = 0.0f;

    if (anchor == TextAnchor.TOP_CENTER
            || anchor == TextAnchor.CENTER
            || anchor == TextAnchor.BOTTOM_CENTER
            || anchor == TextAnchor.BASELINE_CENTER
            || anchor == TextAnchor.HALF_ASCENT_CENTER) {

        xAdj = (float) -bounds.getWidth() / 2.0f;

    }
    else if (anchor == TextAnchor.TOP_RIGHT
            || anchor == TextAnchor.CENTER_RIGHT
            || anchor == TextAnchor.BOTTOM_RIGHT
            || anchor == TextAnchor.BASELINE_RIGHT
            || anchor == TextAnchor.HALF_ASCENT_RIGHT) {

        xAdj = (float) -bounds.getWidth();

    }

    if (anchor == TextAnchor.TOP_LEFT
            || anchor == TextAnchor.TOP_CENTER
            || anchor == TextAnchor.TOP_RIGHT) {

        yAdj = -descent - leading + (float) bounds.getHeight();

    }
    else if (anchor == TextAnchor.HALF_ASCENT_LEFT
            || anchor == TextAnchor.HALF_ASCENT_CENTER
            || anchor == TextAnchor.HALF_ASCENT_RIGHT) {

        yAdj = halfAscent;

    }
    else if (anchor == TextAnchor.CENTER_LEFT
            || anchor == TextAnchor.CENTER
            || anchor == TextAnchor.CENTER_RIGHT) {

        yAdj = -descent - leading + (float) (bounds.getHeight() / 2.0);

    }
    else if (anchor == TextAnchor.BASELINE_LEFT
            || anchor == TextAnchor.BASELINE_CENTER
            || anchor == TextAnchor.BASELINE_RIGHT) {

        yAdj = 0.0f;

    }
    else if (anchor == TextAnchor.BOTTOM_LEFT
            || anchor == TextAnchor.BOTTOM_CENTER
            || anchor == TextAnchor.BOTTOM_RIGHT) {

        yAdj = -metrics.getDescent() - metrics.getLeading();

    }
    if (textBounds != null) {
        textBounds.setRect(bounds);
    }
    result[0] = xAdj;
    result[1] = yAdj;
    return result;

}