fi.hut.tml.xsmiles.mlfc.xslfo.render
Class AWTFontMetrics

java.lang.Object
  extended byfi.hut.tml.xsmiles.mlfc.xslfo.render.AWTFontMetrics

public class AWTFontMetrics
extends java.lang.Object

This is a FontMetrics to be used for AWT rendering. It instanciates a font, depening on famil and style values. The java.awt.FontMetrics for this font is then created to be used for the actual measurement. Since layout is word by word and since it is expected that two subsequent words often share the same style, the Font and FontMetrics is buffered and only changed if needed.

Since FontState and FontInfo multiply all factors by size, we assume a "standard" font of FONT_SIZE.


Field Summary
static int FONT_FACTOR
          This factor multiplies the calculated values to scale to FOP internal measurements
static int FONT_SIZE
          Font size standard used for metric measurements
static int HEIGHT_FACTOR
           
 
Constructor Summary
AWTFontMetrics(java.awt.Component parent)
          Constructs a new Font-metrics.
 
Method Summary
 int getAscender(java.lang.String family, int style, int size)
          Determines the font ascent of the Font described by this FontMetrics object
 int getCapHeight(java.lang.String family, int style, int size)
          The size of a capital letter measured from the font's baseline
 int getDescender(java.lang.String family, int style, int size)
          Determines the font descent of the Font described by this FontMetrics object
 java.awt.Font getFont(java.lang.String family, int style, int size)
          Returns a java.awt.Font instance for the desired family, style and size type.
 int[] getWidths(java.lang.String family, int style, int size)
          Return widths (in 1/1000ths of point size) of all characters
 int getXHeight(java.lang.String family, int style, int size)
          Determines the typical font height of a small cap letter FontMetrics object
 int width(int i, java.lang.String family, int style, int size)
          Returns width (in 1/1000ths of point size) of character at code point i
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

FONT_SIZE

public static final int FONT_SIZE
Font size standard used for metric measurements

See Also:
Constant Field Values

FONT_FACTOR

public static final int FONT_FACTOR
This factor multiplies the calculated values to scale to FOP internal measurements

See Also:
Constant Field Values

HEIGHT_FACTOR

public static final int HEIGHT_FACTOR
See Also:
Constant Field Values
Constructor Detail

AWTFontMetrics

public AWTFontMetrics(java.awt.Component parent)
Constructs a new Font-metrics.

Parameters:
parent - an AWT component - this is needed so that we can get an instance of java.awt.FontMetrics
Method Detail

getAscender

public int getAscender(java.lang.String family,
                       int style,
                       int size)
Determines the font ascent of the Font described by this FontMetrics object

Parameters:
family - font family (jave name) to use
style - font style (jave def.) to use
Returns:
ascent in milliponts

getCapHeight

public int getCapHeight(java.lang.String family,
                        int style,
                        int size)
The size of a capital letter measured from the font's baseline


getDescender

public int getDescender(java.lang.String family,
                        int style,
                        int size)
Determines the font descent of the Font described by this FontMetrics object

Parameters:
family - font family (jave name) to use
style - font style (jave def.) to use
Returns:
descent in milliponts

getXHeight

public int getXHeight(java.lang.String family,
                      int style,
                      int size)
Determines the typical font height of a small cap letter FontMetrics object

Parameters:
family - font family (jave name) to use
style - font style (jave def.) to use
Returns:
font height in milliponts

width

public int width(int i,
                 java.lang.String family,
                 int style,
                 int size)
Returns width (in 1/1000ths of point size) of character at code point i

Parameters:
i - the character for which to get the width
family - font family (jave name) to use
style - font style (jave def.) to use
size - the of the font

getWidths

public int[] getWidths(java.lang.String family,
                       int style,
                       int size)
Return widths (in 1/1000ths of point size) of all characters

Parameters:
family - font family (jave name) to use
style - font style (jave def.) to use

getFont

public java.awt.Font getFont(java.lang.String family,
                             int style,
                             int size)
Returns a java.awt.Font instance for the desired family, style and size type. This is here, so that the font-mapping of FOP-defined fonts to java-fonts can be done in one place and does not need to occur in AWTFontRenderer.

Parameters:
family - font family (jave name) to use
style - font style (jave def.) to use
size - font size
Returns:
font with the desired characeristics.


X-Smiles 1.2