bug#57256: Very long lines displayed in debugger window

[Phil Sainty]

On 2022-08-17 13:55, Phil Sainty wrote:
> On 2022-08-17 13:45, uzibalqa wrote:
> > When I use the debugger I frequently get extremely long lines.
> > I either have to move an excessive amount to the right or having
> > to reduce the scale height to a point where the text gets too
> > small to read.
>
> You can also simply M-x toggle-truncate-lines

In fact, the debugger already supports pretty-printing for the
frame at point if you type "+" (collapse again with "-").

Here's a starter for you:

(defun debugger-expand-all-frames ()
  "Call `backtrace-multi-line' for all debugger frames."
  (interactive)
  (save-excursion
    (goto-char (point-min))
    (while (ignore-errors (backtrace-forward-frame))
      (backtrace-multi-line))))

(define-key debugger-mode-map (kbd "*") #'debugger-expand-all-frames)