lib/browser/GraphBrowser/DefaultFontMetrics.java

move common functions into new file holcf_library.ML

/***************************************************************************
  Title:      GraphBrowser/DefaultFontMetrics.java
  Author:     Stefan Berghofer, TU Muenchen

  Default font metrics which is used when no graphics context
  is available (batch mode).
***************************************************************************/

package GraphBrowser;

public class DefaultFontMetrics implements AbstractFontMetrics {

  private static int[] chars =
	{13, 13, 17, 27, 27, 43, 32, 11, 16, 16, 19, 28, 13, 28, 13, 13, 27,
	 27, 27, 27, 27, 27, 27, 27, 27, 27, 13, 13, 28, 28, 28, 27, 49, 32,
	 32, 35, 35, 32, 29, 37, 35, 13, 24, 32, 27, 40, 35, 37, 32, 37, 35,
	 32, 29, 35, 32, 45, 32, 32, 29, 13, 13, 13, 22, 27, 11, 27, 27, 24,
	 27, 27, 13, 27, 27, 11, 11, 24, 11, 40, 27, 27, 27, 27, 16, 24, 13,
	 27, 24, 35, 24, 24, 24, 16, 12, 16, 28};

  private int size;

  public DefaultFontMetrics(int size)
  { this.size = size; }

  public int getLeading()
  { return 1; }

  public int getAscent()
  { return (int)(Math.round(size * 46.0 / 48.0)); }
  
  public int getDescent() 
  { return (int)(Math.round(size * 10.0 / 48.0)); }
  
  public int charWidth(char c) {
    if (c < 32 || c > 126) { return 0; }
    else {
	    return (int)(Math.round(chars[c - 32] * size / 48.0));
    }
  }
  
  public int stringWidth(String s) {
    int l=0, i;
    for (i=0; i < s.length(); i++) { l += charWidth(s.charAt(i)); }
    return l;
  }
}