Re: Emacs freezes again when I try to open a file including only one very long line.

[Hongyi Zhao]

On Thu, Jun 30, 2022 at 8:02 PM Manuel Giraud <manuel@ledu-giraud.fr> wrote:
>
> Manuel Giraud <manuel@ledu-giraud.fr> writes:
>
> [...]
>
> > My bad: I hadn't tested with this new file and here longlines-mode does
> > not help that much (Emacs is still responsive for me though). It might
> > be that longlines-mode is searching for space and there is none in this
> > file.
>
> And that's it. It works on the "__tmp.symbols" file by modifying those
> two functions in "longlines.el" as follow (here I've just changed the
> string " " to "|"):
>
> --8<---------------cut here---------------start------------->8---
> (defun longlines-find-break-backward ()
>   "Move point backward to the first available breakpoint and return t.
> If no breakpoint is found, return nil."
>   (and (search-backward "|" (line-beginning-position) 1)
>        (save-excursion
>          (skip-chars-backward "|" (line-beginning-position))
>          (null (bolp)))
>        (progn (forward-char 1)
>               (if (and fill-nobreak-predicate
>                        (run-hook-with-args-until-success
>                         'fill-nobreak-predicate))
>                   (progn (skip-chars-backward "|" (line-beginning-position))
>                          (longlines-find-break-backward))
>                 t))))
>
> (defun longlines-find-break-forward ()
>   "Move point forward to the first available breakpoint and return t.
> If no break point is found, return nil."
>   (and (search-forward "|" (line-end-position) 1)
>        (progn (skip-chars-forward " " (line-end-position))
>               (null (eolp)))
>        (if (and fill-nobreak-predicate
>                 (run-hook-with-args-until-success
>                  'fill-nobreak-predicate))
>            (longlines-find-break-forward)
>          t)))
> --8<---------------cut here---------------end--------------->8---
>
> Maybe those searches should work against a bag of separators like
> space, semicolon, veritcal bar… but it is a case to un-obsolete
> longlines.el

I think things/features like this should be added/extended into
longlines.el for flexibility in handling more scenarios.

> --
> Manuel Giraud

Best,
Hongsheng