Exclude Private Area from isWideGraphChar.

This is a stopgap fix for Bug #942.


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@2648 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/ChangeLog

@@ -1,4 +1,7 @@
 Changes towards version 0.7:
+- The Unicode Private Use Area is no longer considered printable.  This 
+  is a stopgap to handle unusual behavior with text entry under OS X.  
+  See bug #942 for more details - Michael
 - Do not rely on GL_UNPACK_SKIP_* arguments, which some OpenGL drivers 
   mishandle (Bug #914) - Michael
 - Do not overwrite GLOBAL_SIS (CrewEnlisted) when leaving Hyperspace 

sc2/src/sc2code/libs/strings/unicode.c

@@ -501,7 +501,14 @@ int
 isWideGraphChar(wchar_t ch)
 {	// this is not technically sufficient, but close enough for us
 	// we'll consider all non-control (CO and C1) chars in 'graph' class
-	return (ch > 0xa0) || (ch > 0x20 && ch < 0x7f);
+	// except for the "Private Use Area" (0xE000 - 0xF8FF)
+
+	// TODO: The private use area is really only glommed by OS X,
+	// and even there, not all of it.  (Delete and Backspace both
+	// end up producing characters there -- see bug #942 for the
+	// gory details.)
+	return (ch > 0xa0 && (ch < 0xE000 || ch > 0xF8FF)) ||
+			(ch > 0x20 && ch < 0x7f);
 }
 
 int