/*
* @(#)X11FontMetrics.java 1.17 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package java.awt;
import java.util.*;
/**
* A font metrics object for a WServer font.
*
* @version 1.6, 10/18/01
*/
class X11FontMetrics extends FontMetrics {
private static native void initIDs();
private static Map XFontMap;
static {
initIDs();
XFontMap = new HashMap(21);
/* Table to map magic 5 names * styles to X Fonts
* To internationalize simply comma seperate further necessary fonts and ensure
* the appropriate chartobyte convertors are supplied with String() the rest will
* automatically happen
*/
XFontMap.put("serif.0", "adobe-times-medium-r-*--*-%d-*");
XFontMap.put("serif.2", "-adobe-times-medium-i-*--*-%d-*");
XFontMap.put("serif.1", "-adobe-times-bold-r-*--*-%d-*");
XFontMap.put("serif.3", "-adobe-times-bold-i-*--*-%d-*");
XFontMap.put("sansserif.0", "-adobe-helvetica-medium-r-normal--*-%d-*");
XFontMap.put("sansserif.2", "-adobe-helvetica-medium-i-normal--*-%d-*");
XFontMap.put("sansserif.1", "-adobe-helvetica-bold-r-normal--*-%d-*");
XFontMap.put("sansserif.3", "-adobe-helvetica-bold-i-normal--*-%d-*");
XFontMap.put("monospaced.0", "-adobe-courier-medium-r-*--*-%d-*");
XFontMap.put("monospaced.2", "-adobe-courier-medium-i-*--*-%d-*");
XFontMap.put("monospaced.1", "-adobe-courier-bold-r-*--*-%d-*");
XFontMap.put("monospaced.3", "-adobe-courier-bold-i-*--*-%d-*");
XFontMap.put("dialog.0", "-adobe-helvetica-medium-r-normal--*-%d-*");
XFontMap.put("dialog.2", "-adobe-helvetica-medium-i-normal--*-%d-*");
XFontMap.put("dialog.1", "-adobe-helvetica-bold-r-normal--*-%d-*");
XFontMap.put("dialog.3", "-adobe-helvetica-bold-i-normal--*-%d-*");
XFontMap.put("dialoginput.0", "-adobe-courier-medium-r-*--*-%d-*");
XFontMap.put("dialoginput.2", "-adobe-courier-medium-i-*--*-%d-*");
XFontMap.put("dialoginput.1", "-adobe-courier-bold-r-*--*-%d-*");
XFontMap.put("dialoginput.3", "-adobe-courier-bold-i-*--*-%d-*");
XFontMap.put("default", "-adobe-courier-medium-r-*--*-%d-*");
}
/**
* The standard ascent of the font. This is the logical height
* above the baseline for the Alphanumeric characters and should
* be used for determining line spacing. Note, however, that some
* characters in the font may extend above this height.
*/
int ascent;
/**
* The standard descent of the font. This is the logical height
* below the baseline for the Alphanumeric characters and should
* be used for determining line spacing. Note, however, that some
* characters in the font may extend below this height.
*/
int descent;
/**
* The standard leading for the font. This is the logical amount
* of space to be reserved between the descent of one line of text
* and the ascent of the next line. The height metric is calculated
* to include this extra space.
*/
int leading;
/**
* The standard height of a line of text in this font. This is
* the distance between the baseline of adjacent lines of text.
* It is the sum of the ascent+descent+leading. There is no
* guarantee that lines of text spaced at this distance will be
* disjoint; such lines may overlap if some characters overshoot
* the standard ascent and descent metrics.
*/
int height;
/**
* The maximum ascent for all characters in this font. No character
* will extend further above the baseline than this metric.
*/
int maxAscent;
/**
* The maximum descent for all characters in this font. No character
* will descend further below the baseline than this metric.
*/
int maxDescent;
/**
* The maximum possible height of a line of text in this font.
* Adjacent lines of text spaced this distance apart will be
* guaranteed not to overlap. Note, however, that many paragraphs
* that contain ordinary alphanumeric text may look too widely
* spaced if this metric is used to determine line spacing. The
* height field should be preferred unless the text in a given
* line contains particularly tall characters.
*/
int maxHeight;
/**
* The maximum advance width of any character in this font.
*/
int maxAdvance;
/* Native font handle */
int XFontSet;
private int[] widths;
/**
* Loads XFontSet and sets up the Font Metric fields
*/
private native int pLoadFont(byte[] fontName);
/**
* Calculate the metrics from the given WServer and font.
*/
public X11FontMetrics(Font font) {
super(font);
/* Here I should load the right font */
String XLFD;
if ((XLFD = (String) XFontMap.get(font.getName().toLowerCase() + "." + font.getStyle())) == null)
XLFD = (String) XFontMap.get("default");
StringBuffer newXLFD = new StringBuffer(30);
int idx1 = 0;
int idx2;
while ((idx2 = XLFD.indexOf("%d", idx1)) != -1) {
newXLFD.append(XLFD.substring(idx1, idx2));
newXLFD.append(Integer.toString(font.getSize() * 10));
idx1 = idx2 + 2;
}
newXLFD.append(XLFD.substring(idx1));
XFontSet = pLoadFont(newXLFD.toString().getBytes());
widths = new int[256];
byte[] byteCharacter = new byte[1];
int i;
for (i = 0; i < 128; i++) {
byteCharacter[0] = (byte) i;
widths[i] = bytesWidth(byteCharacter, 0, 1);
}
for (; i < widths.length; i++)
widths[i] = -1;
}
static String[] getFontList() {
Vector fontNames = new Vector();
Iterator fonts = XFontMap.keySet().iterator();
int dotidx;
while (fonts.hasNext()) {
String fontname = (String) fonts.next();
if ((dotidx = fontname.indexOf('.')) == -1)
dotidx = fontname.length();
fontname = fontname.substring(0, dotidx);
if (!fontNames.contains(fontname))
fontNames.add(fontname);
}
String[] tmpFontNames = new String[fontNames.size()];
System.arraycopy(fontNames.toArray(), 0, tmpFontNames, 0, tmpFontNames.length);
return tmpFontNames;
}
/**
* Get leading
*/
public int getLeading() {
return leading;
}
/**
* Get ascent.
*/
public int getAscent() {
return ascent;
}
/**
* Get descent
*/
public int getDescent() {
return descent;
}
/**
* Get height
*/
public int getHeight() {
return height;
}
/**
* Get maxAscent
*/
public int getMaxAscent() {
return maxAscent;
}
/**
* Get maxDescent
*/
public int getMaxDescent() {
return maxDescent;
}
/**
* Get maxAdvance
*/
public int getMaxAdvance() {
return maxAdvance;
}
/**
* Fast lookup of first 127 chars as these are always the same eg. ASCII charset.
*/
public int charWidth(char c) {
if (c < 128) return widths[c];
char[] ca = new char[1];
ca[0] = c;
return stringWidth(new String(ca));
}
/**
* Return the width of the specified string in this Font.
*/
public int stringWidth(String string) {
byte[] tmpbarr = string.getBytes();
return pBytesWidth(XFontSet, tmpbarr, 0, tmpbarr.length);
}
/**
* Return the width of the specified char[] in this Font.
*/
public int charsWidth(char chars[], int offset, int length) {
String tmpstr = new String(chars).substring(offset, length);
byte[] tmpbarr = tmpstr.getBytes();
return pBytesWidth(XFontSet, tmpbarr, 0, tmpbarr.length);
}
/**
* Return the width of the specified byte[] in this Font.
*/
public int bytesWidth(byte data[], int offset, int len) {
return pBytesWidth(XFontSet, data, offset, len);
}
private native int pBytesWidth(int fontSet, byte data[], int offset, int len);
/**
* Get the widths of the first 256 characters in the font.
*/
public int[] getWidths() {
int[] newWidths = new int[widths.length];
System.arraycopy(widths, 0, newWidths, 0, newWidths.length);
return newWidths;
}
private static Map table = new HashMap();
// fix for 4187686 Several class objects are used for synchronization
private static Object classLock = new Object();
static X11FontMetrics getFontMetrics(Font font) {
// fix for 4187686 Several class objects are used for synchronization
synchronized (classLock) {
X11FontMetrics fm = (X11FontMetrics) table.get(font);
if (fm == null) {
table.put(font, fm = new X11FontMetrics(font));
}
return fm;
}
}
}