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Support highlighting fill-column overflows

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This was previously semi-supported. There were two problems, however:

1. My fill-column value of 80 got out-of-sync with my white-line-column
   value of 100.
   Solution: globally define wpc/fill-column, set that to 80, and
   consume the new const in my config.

2. Nothing was activating whitespace mode.
   Solution: add whitespace-mode to prog-mode-hook.

This SO answer helped tremendously:
https://stackoverflow.com/questions/18855510/have-emacs-highlight-characters-over-80
This commit is contained in:
William Carroll 2018-08-09 12:02:18 -04:00
parent 2211d65557
commit 6393e47c77
3 changed files with 10 additions and 3 deletions
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7
emacs.d/wpc/packages/wpc-ui.el
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@ -127,8 +127,11 @@
;; highlight lines that are over 100 characters long
(use-package whitespace
:config
(setq whitespace-line-column 100)
(setq whitespace-style '(face lines-tail)))
(setq whitespace-line-column wpc/fill-column)
(setq whitespace-style '(face lines-tail))
(add-hook 'prog-mode-hook #'whitespace-mode))
;; disable GUI scrollbars
(when (display-graphic-p)