Re: [PATCH] Flymake Support Indicator Errors in Margin

[Eli Zaretskii <eliz@gnu.org>]

> From: Elijah G <eg642616@gmail.com>
> Date: Wed, 27 Mar 2024 15:29:28 -0600
> Cc: Eli Zaretskii <eliz@gnu.org>, Spencer Baugh <sbaugh@janestreet.com>, philipk@posteo.net, 
> 	emacs-devel@gnu.org, Po Lu <luangruo@yahoo.com>
> 
> I've now updated the patch to allow auto resize margins and using margins
> when it's in terminal frames.

Thanks, I think this is almost ready to be installed; see a few minor
comments below.

> Sadly I couldn't find anything for detecting HDiPI frames, so the user
> must have to configure it.

I don't think Emacs should second-guess the user in this matter: let
the user decide whether the fringes are too narrow for these
indicators.

> +(defcustom flymake-indicator-type (if (display-graphic-p)
> +                                      'fringes
> +                                    'margins)
> +  "Indicate which indicator type to use for display errors.
> +
> +The value can be nil (dont indicate errors but just highlight them),
                         ^^^^
"don't"

> +(defcustom flymake-margin-indicators-string
> +  '((error "!!" compilation-error)
> +    (warning "!" compilation-warning)
> +    (note "!" compilation-info))
> +  "Strings used for margins indicators.
> +The value of each list may be a list of 3 elements where specifies the
> +error type, its string to use and its face,
               ^^^^^^^^^^
"the string"

> +or a list of 2 elements specifying only the error type and its string.
                                                          ^^^^^^^^^^^^^^
"and the corresponding string"

> +Indicators can be an ASCII or non-ASCII string.

This sentence is redundant, so I suggest to remove it.  The ASCII vs
non-ASCII issue is only relevant for the default value; users can do
whatever they want when they customize the option.

> +(defcustom flymake-autoresize-margins t
> +  "If non-nil automatically resize margin-width.
                ^
Comma is missing there.  Also, how about telling what triggers
the resizing?

> +Only if `flymake-indicator-type' is set to margins."
   ^^^^^^^
"Only relevant if..."

> +(defvar-local flymake-original-margin-width nil
> +  "Store original margin width")

Should this be an internal variable (named flymake--original-margin-width)?
Also, please consider telling in the doc string when is the width restored.

> +(defun flymake--resize-margins (&optional og-width)
> +  "Resize current window margins according `flymake-margin-indicator-position'.
                                    ^^^^^^^^^
"according to"

> +Return to original margin width if OG-WIDTH is non-nil."

Suggest to rename OG-WIDTH to ORIG-WIDTH.

Last, but not least: please mention this change (and the new user
options) in NEWS and in the Flymake manual.