0N/A/*
2362N/A * Copyright (c) 1995, 2005, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/Apackage java.awt;
0N/A
0N/Aimport java.awt.Graphics2D;
0N/Aimport java.awt.font.FontRenderContext;
0N/Aimport java.awt.font.LineMetrics;
0N/Aimport java.awt.geom.Rectangle2D;
0N/Aimport java.text.CharacterIterator;
0N/A
0N/A/**
0N/A * The <code>FontMetrics</code> class defines a font metrics object, which
0N/A * encapsulates information about the rendering of a particular font on a
0N/A * particular screen.
0N/A * <p>
0N/A * <b>Note to subclassers</b>: Since many of these methods form closed,
0N/A * mutually recursive loops, you must take care that you implement
0N/A * at least one of the methods in each such loop to prevent
0N/A * infinite recursion when your subclass is used.
0N/A * In particular, the following is the minimal suggested set of methods
0N/A * to override in order to ensure correctness and prevent infinite
0N/A * recursion (though other subsets are equally feasible):
0N/A * <ul>
0N/A * <li>{@link #getAscent()}
0N/A * <li>{@link #getLeading()}
0N/A * <li>{@link #getMaxAdvance()}
0N/A * <li>{@link #charWidth(char)}
0N/A * <li>{@link #charsWidth(char[], int, int)}
0N/A * </ul>
0N/A * <p>
0N/A * <img src="doc-files/FontMetrics-1.gif" alt="The letter 'p' showing its 'reference point'" border=15 align
0N/A * ALIGN=right HSPACE=10 VSPACE=7>
0N/A * Note that the implementations of these methods are
0N/A * inefficient, so they are usually overridden with more efficient
0N/A * toolkit-specific implementations.
0N/A * <p>
0N/A * When an application asks to place a character at the position
0N/A * (<i>x</i>,&nbsp;<i>y</i>), the character is placed so that its
0N/A * reference point (shown as the dot in the accompanying image) is
0N/A * put at that position. The reference point specifies a horizontal
0N/A * line called the <i>baseline</i> of the character. In normal
0N/A * printing, the baselines of characters should align.
0N/A * <p>
0N/A * In addition, every character in a font has an <i>ascent</i>, a
0N/A * <i>descent</i>, and an <i>advance width</i>. The ascent is the
0N/A * amount by which the character ascends above the baseline. The
0N/A * descent is the amount by which the character descends below the
0N/A * baseline. The advance width indicates the position at which AWT
0N/A * should place the next character.
0N/A * <p>
0N/A * An array of characters or a string can also have an ascent, a
0N/A * descent, and an advance width. The ascent of the array is the
0N/A * maximum ascent of any character in the array. The descent is the
0N/A * maximum descent of any character in the array. The advance width
0N/A * is the sum of the advance widths of each of the characters in the
0N/A * character array. The advance of a <code>String</code> is the
0N/A * distance along the baseline of the <code>String</code>. This
0N/A * distance is the width that should be used for centering or
0N/A * right-aligning the <code>String</code>.
0N/A * <p>Note that the advance of a <code>String</code> is not necessarily
0N/A * the sum of the advances of its characters measured in isolation
0N/A * because the width of a character can vary depending on its context.
0N/A * For example, in Arabic text, the shape of a character can change
0N/A * in order to connect to other characters. Also, in some scripts,
0N/A * certain character sequences can be represented by a single shape,
0N/A * called a <em>ligature</em>. Measuring characters individually does
0N/A * not account for these transformations.
0N/A * <p>Font metrics are baseline-relative, meaning that they are
0N/A * generally independent of the rotation applied to the font (modulo
0N/A * possible grid hinting effects). See {@link java.awt.Font Font}.
0N/A *
0N/A * @author Jim Graham
0N/A * @see java.awt.Font
0N/A * @since JDK1.0
0N/A */
0N/Apublic abstract class FontMetrics implements java.io.Serializable {
0N/A
0N/A static {
0N/A /* ensure that the necessary native libraries are loaded */
0N/A Toolkit.loadLibraries();
0N/A if (!GraphicsEnvironment.isHeadless()) {
0N/A initIDs();
0N/A }
0N/A }
0N/A
0N/A private static final FontRenderContext
0N/A DEFAULT_FRC = new FontRenderContext(null, false, false);
0N/A
0N/A /**
0N/A * The actual {@link Font} from which the font metrics are
0N/A * created.
0N/A * This cannot be null.
0N/A *
0N/A * @serial
0N/A * @see #getFont()
0N/A */
0N/A protected Font font;
0N/A
0N/A /*
0N/A * JDK 1.1 serialVersionUID
0N/A */
0N/A private static final long serialVersionUID = 1681126225205050147L;
0N/A
0N/A /**
0N/A * Creates a new <code>FontMetrics</code> object for finding out
0N/A * height and width information about the specified <code>Font</code>
0N/A * and specific character glyphs in that <code>Font</code>.
0N/A * @param font the <code>Font</code>
0N/A * @see java.awt.Font
0N/A */
0N/A protected FontMetrics(Font font) {
0N/A this.font = font;
0N/A }
0N/A
0N/A /**
0N/A * Gets the <code>Font</code> described by this
0N/A * <code>FontMetrics</code> object.
0N/A * @return the <code>Font</code> described by this
0N/A * <code>FontMetrics</code> object.
0N/A */
0N/A public Font getFont() {
0N/A return font;
0N/A }
0N/A
0N/A /**
0N/A * Gets the <code>FontRenderContext</code> used by this
0N/A * <code>FontMetrics</code> object to measure text.
0N/A * <p>
0N/A * Note that methods in this class which take a <code>Graphics</code>
0N/A * parameter measure text using the <code>FontRenderContext</code>
0N/A * of that <code>Graphics</code> object, and not this
0N/A * <code>FontRenderContext</code>
0N/A * @return the <code>FontRenderContext</code> used by this
0N/A * <code>FontMetrics</code> object.
0N/A * @since 1.6
0N/A */
0N/A public FontRenderContext getFontRenderContext() {
0N/A return DEFAULT_FRC;
0N/A }
0N/A
0N/A /**
0N/A * Determines the <em>standard leading</em> of the
0N/A * <code>Font</code> described by this <code>FontMetrics</code>
0N/A * object. The standard leading, or
0N/A * interline spacing, is the logical amount of space to be reserved
0N/A * between the descent of one line of text and the ascent of the next
0N/A * line. The height metric is calculated to include this extra space.
0N/A * @return the standard leading of the <code>Font</code>.
0N/A * @see #getHeight()
0N/A * @see #getAscent()
0N/A * @see #getDescent()
0N/A */
0N/A public int getLeading() {
0N/A return 0;
0N/A }
0N/A
0N/A /**
0N/A * Determines the <em>font ascent</em> of the <code>Font</code>
0N/A * described by this <code>FontMetrics</code> object. The font ascent
0N/A * is the distance from the font's baseline to the top of most
0N/A * alphanumeric characters. Some characters in the <code>Font</code>
0N/A * might extend above the font ascent line.
0N/A * @return the font ascent of the <code>Font</code>.
0N/A * @see #getMaxAscent()
0N/A */
0N/A public int getAscent() {
0N/A return font.getSize();
0N/A }
0N/A
0N/A /**
0N/A * Determines the <em>font descent</em> of the <code>Font</code>
0N/A * described by this
0N/A * <code>FontMetrics</code> object. The font descent is the distance
0N/A * from the font's baseline to the bottom of most alphanumeric
0N/A * characters with descenders. Some characters in the
0N/A * <code>Font</code> might extend
0N/A * below the font descent line.
0N/A * @return the font descent of the <code>Font</code>.
0N/A * @see #getMaxDescent()
0N/A */
0N/A public int getDescent() {
0N/A return 0;
0N/A }
0N/A
0N/A /**
0N/A * Gets the standard height of a line of text in this font. This
0N/A * is the distance between the baseline of adjacent lines of text.
0N/A * It is the sum of the leading + ascent + descent. Due to rounding
0N/A * this may not be the same as getAscent() + getDescent() + getLeading().
0N/A * There is no guarantee that lines of text spaced at this distance are
0N/A * disjoint; such lines may overlap if some characters overshoot
0N/A * either the standard ascent or the standard descent metric.
0N/A * @return the standard height of the font.
0N/A * @see #getLeading()
0N/A * @see #getAscent()
0N/A * @see #getDescent()
0N/A */
0N/A public int getHeight() {
0N/A return getLeading() + getAscent() + getDescent();
0N/A }
0N/A
0N/A /**
0N/A * Determines the maximum ascent of the <code>Font</code>
0N/A * described by this <code>FontMetrics</code> object. No character
0N/A * extends further above the font's baseline than this height.
0N/A * @return the maximum ascent of any character in the
0N/A * <code>Font</code>.
0N/A * @see #getAscent()
0N/A */
0N/A public int getMaxAscent() {
0N/A return getAscent();
0N/A }
0N/A
0N/A /**
0N/A * Determines the maximum descent of the <code>Font</code>
0N/A * described by this <code>FontMetrics</code> object. No character
0N/A * extends further below the font's baseline than this height.
0N/A * @return the maximum descent of any character in the
0N/A * <code>Font</code>.
0N/A * @see #getDescent()
0N/A */
0N/A public int getMaxDescent() {
0N/A return getDescent();
0N/A }
0N/A
0N/A /**
0N/A * For backward compatibility only.
0N/A * @return the maximum descent of any character in the
0N/A * <code>Font</code>.
0N/A * @see #getMaxDescent()
0N/A * @deprecated As of JDK version 1.1.1,
0N/A * replaced by <code>getMaxDescent()</code>.
0N/A */
0N/A @Deprecated
0N/A public int getMaxDecent() {
0N/A return getMaxDescent();
0N/A }
0N/A
0N/A /**
0N/A * Gets the maximum advance width of any character in this
0N/A * <code>Font</code>. The advance is the
0N/A * distance from the leftmost point to the rightmost point on the
0N/A * string's baseline. The advance of a <code>String</code> is
0N/A * not necessarily the sum of the advances of its characters.
0N/A * @return the maximum advance width of any character
0N/A * in the <code>Font</code>, or <code>-1</code> if the
0N/A * maximum advance width is not known.
0N/A */
0N/A public int getMaxAdvance() {
0N/A return -1;
0N/A }
0N/A
0N/A /**
0N/A * Returns the advance width of the specified character in this
0N/A * <code>Font</code>. The advance is the
0N/A * distance from the leftmost point to the rightmost point on the
0N/A * character's baseline. Note that the advance of a
0N/A * <code>String</code> is not necessarily the sum of the advances
0N/A * of its characters.
0N/A *
0N/A * <p>This method doesn't validate the specified character to be a
0N/A * valid Unicode code point. The caller must validate the
0N/A * character value using {@link
0N/A * java.lang.Character#isValidCodePoint(int)
0N/A * Character.isValidCodePoint} if necessary.
0N/A *
0N/A * @param codePoint the character (Unicode code point) to be measured
0N/A * @return the advance width of the specified character
0N/A * in the <code>Font</code> described by this
0N/A * <code>FontMetrics</code> object.
0N/A * @see #charsWidth(char[], int, int)
0N/A * @see #stringWidth(String)
0N/A */
0N/A public int charWidth(int codePoint) {
0N/A if (!Character.isValidCodePoint(codePoint)) {
0N/A codePoint = 0xffff; // substitute missing glyph width
0N/A }
0N/A
0N/A if (codePoint < 256) {
0N/A return getWidths()[codePoint];
0N/A } else {
0N/A char[] buffer = new char[2];
0N/A int len = Character.toChars(codePoint, buffer, 0);
0N/A return charsWidth(buffer, 0, len);
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Returns the advance width of the specified character in this
0N/A * <code>Font</code>. The advance is the
0N/A * distance from the leftmost point to the rightmost point on the
0N/A * character's baseline. Note that the advance of a
0N/A * <code>String</code> is not necessarily the sum of the advances
0N/A * of its characters.
0N/A *
0N/A * <p><b>Note:</b> This method cannot handle <a
0N/A * href="../lang/Character.html#supplementary"> supplementary
0N/A * characters</a>. To support all Unicode characters, including
0N/A * supplementary characters, use the {@link #charWidth(int)} method.
0N/A *
0N/A * @param ch the character to be measured
0N/A * @return the advance width of the specified character
0N/A * in the <code>Font</code> described by this
0N/A * <code>FontMetrics</code> object.
0N/A * @see #charsWidth(char[], int, int)
0N/A * @see #stringWidth(String)
0N/A */
0N/A public int charWidth(char ch) {
0N/A if (ch < 256) {
0N/A return getWidths()[ch];
0N/A }
0N/A char data[] = {ch};
0N/A return charsWidth(data, 0, 1);
0N/A }
0N/A
0N/A /**
0N/A * Returns the total advance width for showing the specified
0N/A * <code>String</code> in this <code>Font</code>. The advance
0N/A * is the distance from the leftmost point to the rightmost point
0N/A * on the string's baseline.
0N/A * <p>
0N/A * Note that the advance of a <code>String</code> is
0N/A * not necessarily the sum of the advances of its characters.
0N/A * @param str the <code>String</code> to be measured
0N/A * @return the advance width of the specified <code>String</code>
0N/A * in the <code>Font</code> described by this
0N/A * <code>FontMetrics</code>.
0N/A * @throws NullPointerException if str is null.
0N/A * @see #bytesWidth(byte[], int, int)
0N/A * @see #charsWidth(char[], int, int)
0N/A * @see #getStringBounds(String, Graphics)
0N/A */
0N/A public int stringWidth(String str) {
0N/A int len = str.length();
0N/A char data[] = new char[len];
0N/A str.getChars(0, len, data, 0);
0N/A return charsWidth(data, 0, len);
0N/A }
0N/A
0N/A /**
0N/A * Returns the total advance width for showing the specified array
0N/A * of characters in this <code>Font</code>. The advance is the
0N/A * distance from the leftmost point to the rightmost point on the
0N/A * string's baseline. The advance of a <code>String</code>
0N/A * is not necessarily the sum of the advances of its characters.
0N/A * This is equivalent to measuring a <code>String</code> of the
0N/A * characters in the specified range.
0N/A * @param data the array of characters to be measured
0N/A * @param off the start offset of the characters in the array
0N/A * @param len the number of characters to be measured from the array
0N/A * @return the advance width of the subarray of the specified
0N/A * <code>char</code> array in the font described by
0N/A * this <code>FontMetrics</code> object.
0N/A * @throws NullPointerException if <code>data</code> is null.
0N/A * @throws IndexOutOfBoundsException if the <code>off</code>
0N/A * and <code>len</code> arguments index characters outside
0N/A * the bounds of the <code>data</code> array.
0N/A * @see #charWidth(int)
0N/A * @see #charWidth(char)
0N/A * @see #bytesWidth(byte[], int, int)
0N/A * @see #stringWidth(String)
0N/A */
0N/A public int charsWidth(char data[], int off, int len) {
0N/A return stringWidth(new String(data, off, len));
0N/A }
0N/A
0N/A /**
0N/A * Returns the total advance width for showing the specified array
0N/A * of bytes in this <code>Font</code>. The advance is the
0N/A * distance from the leftmost point to the rightmost point on the
0N/A * string's baseline. The advance of a <code>String</code>
0N/A * is not necessarily the sum of the advances of its characters.
0N/A * This is equivalent to measuring a <code>String</code> of the
0N/A * characters in the specified range.
0N/A * @param data the array of bytes to be measured
0N/A * @param off the start offset of the bytes in the array
0N/A * @param len the number of bytes to be measured from the array
0N/A * @return the advance width of the subarray of the specified
0N/A * <code>byte</code> array in the <code>Font</code>
0N/A * described by
0N/A * this <code>FontMetrics</code> object.
0N/A * @throws NullPointerException if <code>data</code> is null.
0N/A * @throws IndexOutOfBoundsException if the <code>off</code>
0N/A * and <code>len</code> arguments index bytes outside
0N/A * the bounds of the <code>data</code> array.
0N/A * @see #charsWidth(char[], int, int)
0N/A * @see #stringWidth(String)
0N/A */
0N/A public int bytesWidth(byte data[], int off, int len) {
0N/A return stringWidth(new String(data, 0, off, len));
0N/A }
0N/A
0N/A /**
0N/A * Gets the advance widths of the first 256 characters in the
0N/A * <code>Font</code>. The advance is the
0N/A * distance from the leftmost point to the rightmost point on the
0N/A * character's baseline. Note that the advance of a
0N/A * <code>String</code> is not necessarily the sum of the advances
0N/A * of its characters.
0N/A * @return an array storing the advance widths of the
0N/A * characters in the <code>Font</code>
0N/A * described by this <code>FontMetrics</code> object.
0N/A */
0N/A public int[] getWidths() {
0N/A int widths[] = new int[256];
0N/A for (char ch = 0 ; ch < 256 ; ch++) {
0N/A widths[ch] = charWidth(ch);
0N/A }
0N/A return widths;
0N/A }
0N/A
0N/A /**
0N/A * Checks to see if the <code>Font</code> has uniform line metrics. A
0N/A * composite font may consist of several different fonts to cover
0N/A * various character sets. In such cases, the
0N/A * <code>FontLineMetrics</code> objects are not uniform.
0N/A * Different fonts may have a different ascent, descent, metrics and
0N/A * so on. This information is sometimes necessary for line
0N/A * measuring and line breaking.
0N/A * @return <code>true</code> if the font has uniform line metrics;
0N/A * <code>false</code> otherwise.
0N/A * @see java.awt.Font#hasUniformLineMetrics()
0N/A */
0N/A public boolean hasUniformLineMetrics() {
0N/A return font.hasUniformLineMetrics();
0N/A }
0N/A
0N/A /**
0N/A * Returns the {@link LineMetrics} object for the specified
0N/A * <code>String</code> in the specified {@link Graphics} context.
0N/A * @param str the specified <code>String</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>LineMetrics</code> object created with the
0N/A * specified <code>String</code> and <code>Graphics</code> context.
0N/A * @see java.awt.Font#getLineMetrics(String, FontRenderContext)
0N/A */
0N/A public LineMetrics getLineMetrics( String str, Graphics context) {
0N/A return font.getLineMetrics(str, myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the {@link LineMetrics} object for the specified
0N/A * <code>String</code> in the specified {@link Graphics} context.
0N/A * @param str the specified <code>String</code>
0N/A * @param beginIndex the initial offset of <code>str</code>
0N/A * @param limit the end offset of <code>str</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>LineMetrics</code> object created with the
0N/A * specified <code>String</code> and <code>Graphics</code> context.
0N/A * @see java.awt.Font#getLineMetrics(String, int, int, FontRenderContext)
0N/A */
0N/A public LineMetrics getLineMetrics( String str,
0N/A int beginIndex, int limit,
0N/A Graphics context) {
0N/A return font.getLineMetrics(str, beginIndex, limit, myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the {@link LineMetrics} object for the specified
0N/A * character array in the specified {@link Graphics} context.
0N/A * @param chars the specified character array
0N/A * @param beginIndex the initial offset of <code>chars</code>
0N/A * @param limit the end offset of <code>chars</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>LineMetrics</code> object created with the
0N/A * specified character array and <code>Graphics</code> context.
0N/A * @see java.awt.Font#getLineMetrics(char[], int, int, FontRenderContext)
0N/A */
0N/A public LineMetrics getLineMetrics(char [] chars,
0N/A int beginIndex, int limit,
0N/A Graphics context) {
0N/A return font.getLineMetrics(
0N/A chars, beginIndex, limit, myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the {@link LineMetrics} object for the specified
0N/A * {@link CharacterIterator} in the specified {@link Graphics}
0N/A * context.
0N/A * @param ci the specified <code>CharacterIterator</code>
0N/A * @param beginIndex the initial offset in <code>ci</code>
0N/A * @param limit the end index of <code>ci</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>LineMetrics</code> object created with the
0N/A * specified arguments.
0N/A * @see java.awt.Font#getLineMetrics(CharacterIterator, int, int, FontRenderContext)
0N/A */
0N/A public LineMetrics getLineMetrics(CharacterIterator ci,
0N/A int beginIndex, int limit,
0N/A Graphics context) {
0N/A return font.getLineMetrics(ci, beginIndex, limit, myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the bounds of the specified <code>String</code> in the
0N/A * specified <code>Graphics</code> context. The bounds is used
0N/A * to layout the <code>String</code>.
0N/A * <p>Note: The returned bounds is in baseline-relative coordinates
0N/A * (see {@link java.awt.FontMetrics class notes}).
0N/A * @param str the specified <code>String</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a {@link Rectangle2D} that is the bounding box of the
0N/A * specified <code>String</code> in the specified
0N/A * <code>Graphics</code> context.
0N/A * @see java.awt.Font#getStringBounds(String, FontRenderContext)
0N/A */
0N/A public Rectangle2D getStringBounds( String str, Graphics context) {
0N/A return font.getStringBounds(str, myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the bounds of the specified <code>String</code> in the
0N/A * specified <code>Graphics</code> context. The bounds is used
0N/A * to layout the <code>String</code>.
0N/A * <p>Note: The returned bounds is in baseline-relative coordinates
0N/A * (see {@link java.awt.FontMetrics class notes}).
0N/A * @param str the specified <code>String</code>
0N/A * @param beginIndex the offset of the beginning of <code>str</code>
0N/A * @param limit the end offset of <code>str</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>Rectangle2D</code> that is the bounding box of the
0N/A * specified <code>String</code> in the specified
0N/A * <code>Graphics</code> context.
0N/A * @see java.awt.Font#getStringBounds(String, int, int, FontRenderContext)
0N/A */
0N/A public Rectangle2D getStringBounds( String str,
0N/A int beginIndex, int limit,
0N/A Graphics context) {
0N/A return font.getStringBounds(str, beginIndex, limit,
0N/A myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the bounds of the specified array of characters
0N/A * in the specified <code>Graphics</code> context.
0N/A * The bounds is used to layout the <code>String</code>
0N/A * created with the specified array of characters,
0N/A * <code>beginIndex</code> and <code>limit</code>.
0N/A * <p>Note: The returned bounds is in baseline-relative coordinates
0N/A * (see {@link java.awt.FontMetrics class notes}).
0N/A * @param chars an array of characters
0N/A * @param beginIndex the initial offset of the array of
0N/A * characters
0N/A * @param limit the end offset of the array of characters
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>Rectangle2D</code> that is the bounding box of the
0N/A * specified character array in the specified
0N/A * <code>Graphics</code> context.
0N/A * @see java.awt.Font#getStringBounds(char[], int, int, FontRenderContext)
0N/A */
0N/A public Rectangle2D getStringBounds( char [] chars,
0N/A int beginIndex, int limit,
0N/A Graphics context) {
0N/A return font.getStringBounds(chars, beginIndex, limit,
0N/A myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the bounds of the characters indexed in the specified
0N/A * <code>CharacterIterator</code> in the
0N/A * specified <code>Graphics</code> context.
0N/A * <p>Note: The returned bounds is in baseline-relative coordinates
0N/A * (see {@link java.awt.FontMetrics class notes}).
0N/A * @param ci the specified <code>CharacterIterator</code>
0N/A * @param beginIndex the initial offset in <code>ci</code>
0N/A * @param limit the end index of <code>ci</code>
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>Rectangle2D</code> that is the bounding box of the
0N/A * characters indexed in the specified <code>CharacterIterator</code>
0N/A * in the specified <code>Graphics</code> context.
0N/A * @see java.awt.Font#getStringBounds(CharacterIterator, int, int, FontRenderContext)
0N/A */
0N/A public Rectangle2D getStringBounds(CharacterIterator ci,
0N/A int beginIndex, int limit,
0N/A Graphics context) {
0N/A return font.getStringBounds(ci, beginIndex, limit,
0N/A myFRC(context));
0N/A }
0N/A
0N/A /**
0N/A * Returns the bounds for the character with the maximum bounds
0N/A * in the specified <code>Graphics</code> context.
0N/A * @param context the specified <code>Graphics</code> context
0N/A * @return a <code>Rectangle2D</code> that is the
0N/A * bounding box for the character with the maximum bounds.
0N/A * @see java.awt.Font#getMaxCharBounds(FontRenderContext)
0N/A */
0N/A public Rectangle2D getMaxCharBounds(Graphics context) {
0N/A return font.getMaxCharBounds(myFRC(context));
0N/A }
0N/A
0N/A private FontRenderContext myFRC(Graphics context) {
0N/A if (context instanceof Graphics2D) {
0N/A return ((Graphics2D)context).getFontRenderContext();
0N/A }
0N/A return DEFAULT_FRC;
0N/A }
0N/A
0N/A
0N/A /**
0N/A * Returns a representation of this <code>FontMetrics</code>
0N/A * object's values as a <code>String</code>.
0N/A * @return a <code>String</code> representation of this
0N/A * <code>FontMetrics</code> object.
0N/A * @since JDK1.0.
0N/A */
0N/A public String toString() {
0N/A return getClass().getName() +
0N/A "[font=" + getFont() +
0N/A "ascent=" + getAscent() +
0N/A ", descent=" + getDescent() +
0N/A ", height=" + getHeight() + "]";
0N/A }
0N/A
0N/A /**
0N/A * Initialize JNI field and method IDs
0N/A */
0N/A private static native void initIDs();
0N/A}