Separate faces for year, month, day, hour, minute, and second in dired fontification please

[mentalisttraceur]

I'm thinking, basically:

1. Keep denote-faces-date and denote-faces-time, for backwards compatibility. The new faces will inherit from them, so nothing will change for anyone by default.

2. Add denote-faces-year, denote-faces-month, denote-faces-day (inherit from denote-faces-date) denote-faces-hour, denote-faces-minute, and denote-faces-second (inherit from denote-faces-time).

3. Split "\\(?1:[0-9]\\{8\\}\\)\\(?10:T\\)\\(?2:[0-9]\\{6\\}\\)" into

   "\\(?1:[0-9]\\{4\\}\\)\\(?12:[0-9]\\{2\\}\\)\\(?13:[0-9]\\{2\\}\\)"
   "\\(?10:T\\)"
   "\\(?2:[0-9]\\{2\\}\\)\\(?14:[0-9]\\{2\\}\\)\\(?15:[0-9]\\{2\\}\\)"

   (Personally I would renumber the groups but I just incremented from what was already there.)

Then users who want to boost visual parsing of the date and time can find and configure the faces individually.

[mentalisttraceur]

Three big examples where it's really nice to clearly see the datetime when looking at the file names:

1. Pictures, videos. I'm gradually migrating all such files to Denote-style naming. When looking through those in a Dired, the date and time are often relevant/useful.

2. Legal documents and other records. For example, a signed apartment lease could be given its signature date or expiration date as the Denote ID, precisely to make that information visually accessible from just the file name. (In fact the mere lexical sorting on file name can become a nice crude calendar of either when you received something or when you need to do something about it.)

3. Tasks and events! I have a basic task system built out of Denote+Dired. Each task is a Denote file. A task list is a keyword-filtered Dired buffer. If the task is "scheduled", like an appointment, the Denote ID is that time.

[protesilaos]

Done, thank you!

Quick sample with the modus-themes:

(defun my-modus-themes-denote-faces (&rest _)
  (modus-themes-with-colors
    (custom-set-faces
     `(denote-faces-year ((,c :foreground ,cyan)))
     `(denote-faces-month ((,c :foreground ,magenta-warmer)))
     `(denote-faces-day ((,c :foreground ,cyan)))
     `(denote-faces-time-delimiter ((,c :foreground ,fg-main)))
     `(denote-faces-hour ((,c :foreground ,magenta-warmer)))
     `(denote-faces-minute ((,c :foreground ,cyan)))
     `(denote-faces-second ((,c :foreground ,magenta-warmer))))))

(add-hook 'modus-themes-post-load-hook #'my-modus-themes-denote-faces)

[mentalisttraceur]

Nice, thank you!