Initial revision

From-SVN: r102074
2005-07-16 00:30:23 +00:00
parent 6f4434b39b
commit f911ba985a
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+/* GdkFontMetrics.java
+   Copyright (C) 1999, 2002, 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.awt.peer.gtk;
+
+import gnu.java.awt.ClasspathToolkit;
+
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Toolkit;
+
+public class GdkFontMetrics extends FontMetrics
+{
+  
+  private int[] font_metrics;
+  GdkFontPeer peer;
+
+  static final int FONT_METRICS_ASCENT = 0;
+  static final int FONT_METRICS_MAX_ASCENT = 1;
+  static final int FONT_METRICS_DESCENT = 2;
+  static final int FONT_METRICS_MAX_DESCENT = 3;
+  static final int FONT_METRICS_MAX_ADVANCE = 4;
+
+  static final int TEXT_METRICS_X_BEARING = 0;
+  static final int TEXT_METRICS_Y_BEARING = 1;
+  static final int TEXT_METRICS_WIDTH = 2;
+  static final int TEXT_METRICS_HEIGHT = 3;
+  static final int TEXT_METRICS_X_ADVANCE = 4;
+  static final int TEXT_METRICS_Y_ADVANCE = 5;
+
+
+  public GdkFontMetrics (Font font)
+  {    
+    super (font.getPeer() instanceof GdkFontPeer 
+           ? font 
+           : ((ClasspathToolkit)(Toolkit.getDefaultToolkit ()))
+           .getFont (font.getName(), font.getAttributes ()));
+    
+    peer = (GdkFontPeer) this.font.getPeer();
+
+    font_metrics = new int[5];
+    double [] hires = new double[5];
+    peer.getFontMetrics (hires);
+    for (int i = 0; i < 5; ++i)
+      font_metrics[i] = (int) hires[i];
+  }
+  
+  public int stringWidth (String str)
+  {
+    double [] hires = new double[6];
+    peer.getTextMetrics(str, hires);
+    return (int) hires [TEXT_METRICS_WIDTH];
+  }
+
+  public int charWidth (char ch)
+  {
+    return stringWidth (new String (new char[] { ch }));
+  }
+
+  public int charsWidth (char data[], int off, int len)
+  {
+    return stringWidth (new String (data, off, len));
+  }
+
+  /* 
+     Sun's Motif implementation always returns 0 or 1 here (???), but
+     going by the X11 man pages, it seems as though we should return
+     font.ascent + font.descent.
+  */
+  public int getLeading ()
+  {
+    return 1;
+  }
+
+  public int getAscent ()
+  {
+    return font_metrics[FONT_METRICS_ASCENT];
+  }
+
+  public int getMaxAscent ()
+  {
+    return font_metrics[FONT_METRICS_MAX_ASCENT];
+  }
+
+  public int getDescent ()
+  {
+    return font_metrics[FONT_METRICS_DESCENT];
+  }
+
+  public int getMaxDescent ()
+  {
+    return font_metrics[FONT_METRICS_MAX_DESCENT];
+  }
+
+  public int getMaxAdvance ()
+  {
+    return font_metrics[FONT_METRICS_MAX_ADVANCE];
+  }
+}