isPrintable

[JVM]
fun isPrintable(ch: Int): Boolean

This indicates if ch is printable with System.err.println() and Graphics.drawString(); hence, it is a subset of 0..255.

This is used, for example, to limit characters entering CoText.
Currently, this accepts the ch if (ch>=32 && ch<127) || (ch>=161 && ch<=255).
tab(#9) is not included. It should be caught separately and dealt with (expand to spaces?). The problem is that tabs are printed with a wide box (non-character symbol) in Windows Courier font. Thus, they mess up the positioning of characters in CoText.
newline is not included. It should be caught separately and dealt with.
This requires further study into all standard fonts on all platforms to see if other characters can be accepted.

true if ch is a printable character

JVM


ch	a char

[JVM]
fun isPrintable(s: String): Boolean

Returns true if all of the characters in s are printable