src/Tools/GraphBrowser/graphbrowser/AbstractFontMetrics.java

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/GraphBrowser/graphbrowser/AbstractFontMetrics.java	Fri Jul 16 12:55:02 2021 +0200
@@ -0,0 +1,16 @@
+/***************************************************************************
+  Title:      graphbrowser/AWTFontMetrics.java
+  Author:     Gerwin Klein, TU Muenchen
+
+  AbstractFontMetrics avoids dependency on java.awt.FontMetrics in 
+  batch mode.
+  
+***************************************************************************/
+
+package isabelle.graphbrowser;
+
+public interface AbstractFontMetrics {
+  public int stringWidth(String str);
+  public int getAscent();
+  public int getDescent();
+}