Bad RTF now causes an error message to appear in the transcription

instead of causing a fatal exception.  The error allows you to look up
the DuffCode that caused the trouble.

source/org/thdl/tib/text/DuffCode.java

@@ -20,6 +20,8 @@ package org.thdl.tib.text;
 
 import java.util.StringTokenizer;
 
+import org.thdl.util.ThdlDebug;
+
 /**
 * A wrapper for the primitive data types
 * that combine to represent a Tibetan glyph in the
@@ -71,17 +73,18 @@ public class DuffCode {
 			Integer num2 = new Integer(val2);
 
 			if (leftToRight) {
-				fontNum = num1.intValue();
+                setFontNum(num1.intValue());
 				charNum = num2.intValue();
 				character = (char)charNum;
 			}
 			else {
-				fontNum = num2.intValue();
+                setFontNum(num2.intValue());
 				charNum = num1.intValue();
 				character = (char)charNum;
 			}						
 		}
 		catch (NumberFormatException e) {
+            ThdlDebug.noteIffyCode();
 		}
 	}
 
@@ -93,11 +96,16 @@ public class DuffCode {
 * @param ch a character
 */
 	public DuffCode(int font, char ch) {
-		fontNum = font;
+		setFontNum(font);
 		character = ch;
 		charNum = (int)ch;
 	}
 
+    private void setFontNum(int font) {
+        ThdlDebug.verify(font >= 1 && font <= 10);
+        fontNum = font;
+    }
+
 /**
 * Gets the font number of this glyph.
 * @return the identifying font number for this DuffCode
@@ -160,6 +168,8 @@ public class DuffCode {
 * @return a string representation of this object
 */
 	public String toString() {
-		return "fontNum="+fontNum+";charNum="+charNum+";character="+new Character(character).toString();
+		return "<duffcode font=" + TibetanMachineWeb.tmwFontNames[fontNum]
+            + " charNum=" + charNum + " character="
+            + new Character(character).toString() + "/>";
 	}
 }

source/org/thdl/tib/text/TibetanMachineWeb.java

@@ -28,6 +28,7 @@ import javax.swing.text.*;
 import java.awt.font.*;
 
 import org.thdl.util.ThdlDebug;
+import org.thdl.util.ThdlLazyException;
 import org.thdl.util.Trie;
 import org.thdl.util.ThdlOptions;
 
@@ -537,17 +538,10 @@ public static boolean isFormatting(char c) {
 * false if not
 */
 public static boolean isChar(String s) {
-	if (currentKeyboardIsExtendedWylie()) {
-		if (charSet.contains(s))
-			return true;
+	if (currentKeyboardIsExtendedWylie())
+		return charSet.contains(s);
 	else
-			return false;	
-	}
-	else
-		if (keyboard.isChar(s))
-			return true;
-		else
-			return false;
+		return keyboard.isChar(s);
 }
 
 /**
@@ -934,6 +928,9 @@ public static String getWylieForGlyph(int font, int code) {
 */
 public static String getWylieForGlyph(DuffCode dc) {
 	String hashKey = getHashKeyForGlyph(dc);
+    if (hashKey == null) {
+        return "<<[[JSKAD_TMW_TO_WYLIE_ERROR_NO_SUCH_WYLIE: Cannot convert DuffCode " + dc + " to THDL Extended Wylie.  Please see the documentation for the TMW font and transcribe this yourself.]]>>";
+    }
 	return wylieForGlyph(hashKey);
 }