jline is buggy, especially when using arrow keys

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On Windows, scala interpreter does not show caret(or cursor) during left/right arrow keys are pressed.

Suppose I typing like below.

scala> println("Helo scala"

Caret is end of line.
When I try to go back few chars to correct "Helo" to "Hello", scala interpreter does not showing caret, during left arrow key pressed down.

I can't see where I am now during move around in line.
I hope this to be fixed.

Environment:
-Windows XP SP3
-Scala 2.7.7 final (I tried with some build of 2.8, but situation does not seems to fixed)

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Imported From: https://issues.scala-lang.org/browse/SI-2547?orig=1
Reporter: Koji Yoshioka (kyab)
Attachments:

• 0001-Fix-invisible-cursor-on-continuous-left-right-arrow-.patch (created on Nov 28, 2010 5:58:57 AM UTC, 105167 bytes)

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@paulp said:
It's not windows specific. Yes jline definitely needs work, and any community contribution would be gratefully received (and not just by scala, but jruby/jython/you name it.)

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@SethTisue said:
close as wontfix?

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@paulp said:
As a matter of fact, no! I will close soon-ish as was-fixed.

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huynhjl said:
jline patch for Windows (includes new DLLs)

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Sonnenschein (sonnenschein) said:
As of 2.9.1.RC2 (and probably earlier) the cursor is visible while holding the arrow keys.

But I'm still missing usable wordwise moving.
Previous word: Ctrl-O works, but ctrl-G not. Next word: (don't know)?
Apart from ctrl-combinations, desirable is to have ctrl-left and ctrl-right.

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@paulp said:
ctrl-T is next word. It works in 2.9.1 on osx.

Welcome to Scala version 2.9.1.final (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_29).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :key
Reading jline properties for default key bindings.
Accuracy not guaranteed: treat this as a guideline only.

  1 CTRL-A: move to the beginning of the line
  2 CTRL-B: move to the previous character
  4 CTRL-D: close out the input stream
  5 CTRL-E: move the cursor to the end of the line
  6 CTRL-F: move to the next character
  7 CTRL-G: abort
  8 BACKSPACE, CTRL-H: delete the previous character 8 is the ASCII code for backspace and therefor deleting the previous character
  9 TAB, CTRL-I: signal that console completion should be attempted
 10 CTRL-J, CTRL-M: newline
 11 CTRL-K: erase the current line
 12 CTRL-L: clear screen
 13 ENTER: newline
 14 CTRL-N: scroll to the next element in the history buffer
 15 CTRL-O: move to the previous word
 16 CTRL-P: scroll to the previous element in the history buffer
 18 CTRL-R: search history
 20 CTRL-T: move to next word
 21 CTRL-U: delete all the characters before the cursor position
 22 CTRL-V: paste the contents of the clipboard (useful for Windows terminal)
 23 CTRL-W: delete the word directly before the cursor
 24 CTRL-X: delete the word directly after the cursor
127 DELETE, CTRL-?: delete the next character 127 is the ASCII code for delete

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@adriaanm said:
This should be fixed upstream. We're moving to vanilla jline: #7604