gomp-20050608-branch/libjava/gnu/gcj/xlib/Font.java

   1 /* Copyright (C) 2000  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 package gnu.gcj.xlib;
  10
  11 import gnu.gcj.RawData;
  12
  13 /**
  14  * An X11 Font, implemented as a wrapper around an X11 Font XID and
  15  * the associated Xlib XFontStruct structure.
  16  *
  17  * @author Rolf W. Rasmussen <rolfwr@ii.uib.no>
  18  */
  19 public final class Font extends XID
  20 {
  21
  22   /**
  23    * @param lfdNamePattern a font name pattern following the
  24    * <em>X Logical Font Description Conventions</em>.
  25    */
  26   public Font(Display display, String lfdNamePattern)
  27   {
  28     this(display, loadFont(display, lfdNamePattern));
  29   }
  30
  31   Font(Display display, RawData struct)
  32   {
  33     super(display, getXIDFromStruct(struct));
  34     structure = struct;
  35   }
  36
  37   static RawData loadFont(Display display, String lfdNamePattern)
  38   {
  39     RawData returnValue = null;
  40     try
  41     {
  42       returnValue = loadFontImpl (display,lfdNamePattern);
  43     }
  44     catch (XException e)
  45     {
  46       // Throw a descriptive exception, including the font pattern
  47       throw new XException ("Font not found: " + lfdNamePattern);
  48     }
  49     return returnValue;
  50   }
  51   static native RawData loadFontImpl(Display display, String lfdNamePattern);
  52
  53   static native int getXIDFromStruct(RawData structure);
  54
  55   public native int getAscent();
  56   public native int getDescent();
  57   public native int getMaxAscent();
  58   public native int getMaxDescent();
  59
  60   public native int getStringWidth(String str);
  61
  62   protected native void finalize();
  63
  64   RawData structure;
  65 }