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Commit b53d0783 by Michael Koch Committed by Michael Koch
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FontMetrics.java: Reformatted. 

2005-04-19  Michael Koch  <konqueror@gmx.de>

	* java/awt/FontMetrics.java: Reformatted.
	(getFontRenderContext): Handle case when java.awt.Graphics context is
	given.

2005-04-19  Michael Koch  <konqueror@gmx.de>

	* java/awt/FontMetrics.java
	(getStringBounds): New methods.

From-SVN: r98398
parent fd603291
Showing with 343 additions and 369 deletions
libjava/ChangeLog
2005-04-19 Michael Koch <konqueror@gmx.de>
* java/awt/FontMetrics.java: Reformatted.
(getFontRenderContext): Handle case when java.awt.Graphics context is
given.
2005-04-19 Michael Koch <konqueror@gmx.de>
* java/awt/FontMetrics.java
(getStringBounds): New methods.
2005-04-19 Michael Koch <konqueror@gmx.de>
* gnu/java/security/x509/X509Certificate.java
(parse): Handle val == null case.
......
libjava/java/awt/FontMetrics.java
/* FontMetrics.java -- Information about about a fonts display characteristics
Copyright (C) 1999, 2002 Free Software Foundation, Inc.
Copyright (C) 1999, 2002, 2005 Free Software Foundation, Inc.
This file is part of GNU Classpath.
......@@ -40,6 +40,7 @@ package java.awt;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.awt.geom.Rectangle2D;
import java.text.CharacterIterator;
// FIXME: I leave many methods basically unimplemented. This
......@@ -49,7 +50,7 @@ import java.text.CharacterIterator;
* This class returns information about the display characteristics of
* a font. It is abstract, and concrete subclasses should implement at
* least the following methods:
* <p>
*
* <ul>
* <li>getAscent()</li>
* <li>getDescent()</li>
......@@ -63,401 +64,362 @@ import java.text.CharacterIterator;
*/
public abstract class FontMetrics implements java.io.Serializable
{
// Serialization constant.
private static final long serialVersionUID = 1681126225205050147L;
/**
* This is the font for which metrics will be returned.
*/
protected Font font;
/**
* Initializes a new instance of <code>FontMetrics</code> for the
* specified font.
*
* @param font The font to return metric information for.
*/
protected FontMetrics(Font font)
{
this.font = font;
}
/*
* Static Variables
*/
// Serialization constant
private static final long serialVersionUID = 1681126225205050147L;
/*************************************************************************/
/*
* Instance Variables
*/
/**
* This is the font for which metrics will be returned.
*/
protected Font font;
/*************************************************************************/
/*
* Constructors
*/
/**
* Initializes a new instance of <code>FontMetrics</code> for the
* specified font.
*
* @param font The font to return metric information for.
*/
protected
FontMetrics(Font font)
{
this.font = font;
}
/*************************************************************************/
/*
* Instance Methods
*/
/**
* Returns the font that this object is creating metric information fo.
*
* @return The font for this object.
*/
public Font
getFont()
{
return(font);
}
/*************************************************************************/
/**
* Returns the leading, or spacing between lines, for this font.
*
* @return The font leading.
*/
public int
getLeading()
{
return(0);
}
/*************************************************************************/
/**
* Returns the ascent of the font, which is the distance from the base
* to the top of the majority of characters in the set. Some characters
* can exceed this value however.
*
* @return The font ascent.
*/
public int
getAscent()
{
return(1);
}
/*************************************************************************/
/**
* Returns the descent of the font, which is the distance from the base
* to the bottom of the majority of characters in the set. Some characters
* can exceed this value however.
*
* @return The font descent.
*/
public int
getDescent()
{
return(1);
}
/*************************************************************************/
/**
* Returns the height of a line in this font. This will be the sum
* of the leading, the ascent, and the descent.
*
* @return The height of the font.
*/
public int
getHeight()
{
return(getAscent() + getDescent() + getLeading());
}
/*************************************************************************/
/**
* Returns the maximum ascent value. This is the maximum distance any
* character in the font rised above the baseline.
*
* @return The maximum ascent for this font.
*/
public int
getMaxAscent()
{
return(getAscent());
}
/*************************************************************************/
/**
* Returns the font that this object is creating metric information fo.
*
* @return The font for this object.
*/
public Font getFont()
{
return font;
}
/**
* Returns the maximum descent value. This is the maximum distance any
* character in the font extends below the baseline.
*
* @return The maximum descent for this font.
*/
public int
getMaxDescent()
{
return getMaxDecent ();
}
/**
* Returns the leading, or spacing between lines, for this font.
*
* @return The font leading.
*/
public int getLeading()
{
return 0;
}
/*************************************************************************/
/**
* Returns the ascent of the font, which is the distance from the base
* to the top of the majority of characters in the set. Some characters
* can exceed this value however.
*
* @return The font ascent.
*/
public int getAscent()
{
return 1;
}
/**
* Returns the maximum descent value. This is the maximum distance any
* character in the font extends below the baseline.
*
* @return The maximum descent for this font.
*
* @deprecated This method is deprecated in favor of
* <code>getMaxDescent()</code>.
*/
public int
getMaxDecent()
{
return getDescent ();
}
/**
* Returns the descent of the font, which is the distance from the base
* to the bottom of the majority of characters in the set. Some characters
* can exceed this value however.
*
* @return The font descent.
*/
public int getDescent()
{
return 1;
}
/*************************************************************************/
/**
* Returns the height of a line in this font. This will be the sum
* of the leading, the ascent, and the descent.
*
* @return The height of the font.
*/
public int getHeight()
{
return getAscent() + getDescent() + getLeading();
}
/**
* Returns the width of the widest character in the font.
*
* @return The width of the widest character in the font.
*/
public int
getMaxAdvance()
{
return(-1);
}
/**
* Returns the maximum ascent value. This is the maximum distance any
* character in the font rised above the baseline.
*
* @return The maximum ascent for this font.
*/
public int getMaxAscent()
{
return getAscent();
}
/*************************************************************************/
/**
* Returns the maximum descent value. This is the maximum distance any
* character in the font extends below the baseline.
*
* @return The maximum descent for this font.
*/
public int getMaxDescent()
{
return getMaxDecent();
}
/**
* Returns the width of the specified character.
*
* @param ch The character to return the width of.
*
* @return The width of the specified character.
*/
public int
charWidth(int ch)
{
return(charWidth((char)ch));
}
/**
* Returns the maximum descent value. This is the maximum distance any
* character in the font extends below the baseline.
*
* @return The maximum descent for this font.
*
* @deprecated This method is deprecated in favor of
* <code>getMaxDescent()</code>.
*/
public int getMaxDecent()
{
return getDescent();
}
/*************************************************************************/
/**
* Returns the width of the widest character in the font.
*
* @return The width of the widest character in the font.
*/
public int getMaxAdvance()
{
return -1;
}
/**
* Returns the width of the specified character.
*
* @param ch The character to return the width of.
*
* @return The width of the specified character.
*/
public int
charWidth(char ch)
{
return(1);
}
/**
* Returns the width of the specified character.
*
* @param ch The character to return the width of.
*
* @return The width of the specified character.
*/
public int charWidth(int ch)
{
return charWidth((char) ch);
}
/*************************************************************************/
/**
* Returns the width of the specified character.
*
* @param ch The character to return the width of.
*
* @return The width of the specified character.
*/
public int charWidth(char ch)
{
return 1;
}
/**
* Returns the total width of the specified string
*
* @param str The string to return the width of.
*
* @return The width of the string.
*/
public int
stringWidth(String str)
{
char[] buf = new char[str.length()];
str.getChars(0, str.length(), buf, 0);
/**
* Returns the total width of the specified string
*
* @param str The string to return the width of.
*
* @return The width of the string.
*/
public int stringWidth(String str)
{
char[] buf = new char[str.length()];
str.getChars(0, str.length(), buf, 0);
return(charsWidth(buf, 0, buf.length));
}
return charsWidth(buf, 0, buf.length);
}
/*************************************************************************/
/**
* Returns the total width of the specified character array.
*
* @param buf The character array containing the data.
* @param offset The offset into the array to start calculating from.
* @param len The total number of bytes to process.
*
* @return The width of the requested characters.
*/
public int charsWidth(char[] buf, int offset, int len)
{
int total_width = 0;
for (int i = offset; i < len; i++)
total_width += charWidth(buf[i]);
return total_width;
}
/**
* Returns the total width of the specified character array.
*
* @param buf The character array containing the data.
* @param offset The offset into the array to start calculating from.
* @param len The total number of bytes to process.
*
* @return The width of the requested characters.
*/
public int
charsWidth(char buf[], int offset, int len)
{
int total_width = 0;
for (int i = offset; i < len; i++)
total_width += charWidth(buf[i]);
return(total_width);
}
/**
* Returns the total width of the specified byte array.
*
* @param buf The byte array containing the data.
* @param offset The offset into the array to start calculating from.
* @param len The total number of bytes to process.
*
* @return The width of the requested characters.
*/
public int bytesWidth(byte[] buf, int offset, int len)
{
int total_width = 0;
for (int i = offset; i < len; i++)
total_width = charWidth((char) buf[i]);
/*************************************************************************/
return total_width;
}
/**
* Returns the total width of the specified byte array.
*
* @param buf The byte array containing the data.
* @param offset The offset into the array to start calculating from.
* @param len The total number of bytes to process.
*
* @return The width of the requested characters.
*/
public int
bytesWidth(byte buf[], int offset, int len)
{
int total_width = 0;
for (int i = offset; i < len; i++)
total_width = charWidth((char)buf[i]);
/**
* Returns the widths of the first 256 characters in the font.
*
* @return The widths of the first 256 characters in the font.
*/
public int[] getWidths()
{
int[] result = new int[256];
for (char i = 0; i < 256; i++)
result[i] = charWidth(i);
return result;
}
return(total_width);
}
/**
* Returns a string representation of this object.
*
* @return A string representation of this object.
*/
public String toString()
{
return (this.getClass() + "[font=" + font + ",ascent=" + getAscent()
+ ",descent=" + getDescent() + ",height=" + getHeight() + "]");
}
/*************************************************************************/
// Generic FontRenderContext used when getLineMetrics is called with a
// plain Graphics object.
private static final FontRenderContext gRC = new FontRenderContext(null,
false,
false);
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param text The string to calculate metrics from.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*/
public LineMetrics getLineMetrics(String text, Graphics g)
{
return getLineMetrics(text, 0, text.length(), g);
}
/**
* Returns the widths of the first 256 characters in the font.
*
* @return The widths of the first 256 characters in the font.
*/
public int[]
getWidths()
{
int [] result = new int[256];
for(char i = 0; i < 256; i++)
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param text The string to calculate metrics from.
* @param begin Index of first character in <code>text</code> to measure.
* @param limit Index of last character in <code>text</code> to measure.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*
* @throws IndexOutOfBoundsException if the range [begin, limit] is
* invalid in <code>text</code>.
*/
public LineMetrics getLineMetrics(String text, int begin, int limit,
Graphics g)
{
result[i]= charWidth(i);
FontRenderContext rc;
if (g instanceof Graphics2D)
rc = ((Graphics2D) g).getFontRenderContext();
else
rc = gRC;
return font.getLineMetrics(text, begin, limit, rc);
}
return(result);
}
/*************************************************************************/
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param chars The string to calculate metrics from.
* @param begin Index of first character in <code>text</code> to measure.
* @param limit Index of last character in <code>text</code> to measure.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*
* @throws IndexOutOfBoundsException if the range [begin, limit] is
* invalid in <code>text</code>.
*/
public LineMetrics getLineMetrics(char[] chars, int begin, int limit,
Graphics g)
{
FontRenderContext rc;
if (g instanceof Graphics2D)
rc = ((Graphics2D) g).getFontRenderContext();
else
rc = gRC;
return font.getLineMetrics(chars, begin, limit, rc);
}
/**
* Returns a string representation of this object.
*
* @return A string representation of this object.
*/
public String
toString()
{
return (this.getClass() + "[font=" + font + ",ascent=" + getAscent()
+ ",descent=" + getDescent() + ",height=" + getHeight() + "]");
}
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param ci An iterator over the string to calculate metrics from.
* @param begin Index of first character in <code>text</code> to measure.
* @param limit Index of last character in <code>text</code> to measure.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*
* @throws IndexOutOfBoundsException if the range [begin, limit] is
* invalid in <code>text</code>.
*/
public LineMetrics getLineMetrics(CharacterIterator ci, int begin,
int limit, Graphics g)
{
FontRenderContext rc;
if (g instanceof Graphics2D)
rc = ((Graphics2D) g).getFontRenderContext();
else
rc = gRC;
return font.getLineMetrics(ci, begin, limit, rc);
}
public Rectangle2D getStringBounds(String str, Graphics context)
{
return font.getStringBounds(str, getFontRenderContext(context));
}
// Generic FontRenderContext used when getLineMetrics is called with a
// plain Graphics object.
private static final FontRenderContext gRC = new FontRenderContext(null,
false,
false);
public Rectangle2D getStringBounds(String str, int beginIndex, int limit,
Graphics context)
{
return font.getStringBounds(str, beginIndex, limit,
getFontRenderContext(context));
}
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param text The string to calculate metrics from.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*/
public LineMetrics getLineMetrics(String text, Graphics g)
{
return getLineMetrics(text, 0, text.length(), g);
}
public Rectangle2D getStringBounds(char[] chars, int beginIndex, int limit,
Graphics context)
{
return font.getStringBounds(chars, beginIndex, limit,
getFontRenderContext(context));
}
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param text The string to calculate metrics from.
* @param begin Index of first character in <code>text</code> to measure.
* @param limit Index of last character in <code>text</code> to measure.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*
* @throws IndexOutOfBoundsException if the range [begin, limit] is
* invalid in <code>text</code>.
*/
public LineMetrics getLineMetrics(String text, int begin,
int limit, Graphics g)
{
FontRenderContext rc;
if (g instanceof Graphics2D)
rc = ((Graphics2D) g).getFontRenderContext();
else
rc = gRC;
return font.getLineMetrics(text, begin, limit, rc);
}
public Rectangle2D getStringBounds(CharacterIterator ci, int beginIndex,
int limit, Graphics context)
{
return font.getStringBounds(ci, beginIndex, limit,
getFontRenderContext(context));
}
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param chars The string to calculate metrics from.
* @param begin Index of first character in <code>text</code> to measure.
* @param limit Index of last character in <code>text</code> to measure.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*
* @throws IndexOutOfBoundsException if the range [begin, limit] is
* invalid in <code>text</code>.
*/
public LineMetrics getLineMetrics(char[] chars, int begin,
int limit, Graphics g)
{
FontRenderContext rc;
if (g instanceof Graphics2D)
rc = ((Graphics2D) g).getFontRenderContext();
else
rc = gRC;
return font.getLineMetrics(chars, begin, limit, rc);
}
private FontRenderContext getFontRenderContext(Graphics context)
{
if (context instanceof Graphics2D)
return ((Graphics2D) context).getFontRenderContext();
/**
* Returns a {@link LineMetrics} object constructed with the
* specified text and the {@link FontRenderContext} of the Graphics
* object when it is an instance of Graphics2D or a generic
* FontRenderContext with a null transform, not anti-aliased and not
* using fractional metrics.
*
* @param ci An iterator over the string to calculate metrics from.
* @param begin Index of first character in <code>text</code> to measure.
* @param limit Index of last character in <code>text</code> to measure.
* @param g The Graphics object that will be used.
*
* @return A new {@link LineMetrics} object.
*
* @throws IndexOutOfBoundsException if the range [begin, limit] is
* invalid in <code>text</code>.
*/
public LineMetrics getLineMetrics(CharacterIterator ci, int begin,
int limit, Graphics g)
{
FontRenderContext rc;
if (g instanceof Graphics2D)
rc = ((Graphics2D) g).getFontRenderContext();
else
rc = gRC;
return font.getLineMetrics(ci, begin, limit, rc);
}
return gRC;
}
}
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