Re: Background color past the end of the buffer

[Vaidheeswaran C <vaidheeswaran.chinnaraju@gmail.com>]

On Friday 10 July 2015 12:06 AM, Yuri D'Elia wrote:
> I'd like to highlight the region past the end of the buffer; that is:
> assuming the buffer ends somewhere halfway the current frame (either due
> to scrolling or due to the buffer being short), I'd like to set an
> highlight between (point-max) and down to the modeline.
> 
> I assume it's not possible using markers, and thus overlays.
> 
> I don't want to display anything important right now, just change the
> background color.
> 
> Any other trick I could use?

Install these ... and then do M-x highlight-buffer-footer.

(defface buffer-footer
  '((t (:background "gold1")))
  "Face for buffer footer")

(defface buffer-text
  '((t (:background "white")))
  "Face for buffer text.")

(defun highlight-buffer-footer ()
  (interactive)
  (custom-set-variables
   '(buffer-face-mode-face (quote buffer-footer)))
  (buffer-face-mode 1)
  (overlay-put (make-overlay (point-min) (point-max)) 'face 'buffer-text))

Use of overlays (as seen above) may not be a good idea.  It would be
worth exploring if face remapping could be used (or improved upon) to
achieve the above effect.

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If you are only intereseted in catching whitespaces at the tail end of
the buffer, you can turn on the `empty' style in M-x whitespace-mode
and M-x whitespace-toggle-options.