CODEWITHSUNDEEP
unicodeemacs
C-x C-c
C-x C-c

Reputation: 1321

Strikethrough in Terminal Emacs

I'm trying to get a strikethrough to work in terminal emacs. When I add a strikethrough via the face route, nothing happens. I can, however, paste text with a strikethrough into emacs and it renders correctly. When I describe-char on it, it says (done with i):

Composed with the following character(s) "̶" by these characters:  
i (#x69)
- (#x336)

I know that many terminals can't handle strikethroughs, but I know mine can, because you can paste them into it. I'm struggling to understand why editing the face doesn't work but I can paste strikethroughs in.

Upvotes: 2

Views: 654

Answers (1)

jpkotta
jpkotta

Reputation: 9427

It sounds like you want to insert composing characters to strike out, such that you're changing the contents of the buffer. I don't think I got all the corner cases, but this is a start:

(defun strikeout-region (b e)
  "Use \"COMBINING LONG STROKE OVERLAY\" unicode char to strike out the region."
  (interactive "r")
  (when (use-region-p)
    (save-mark-and-excursion
      (goto-char b)
      (while (and (<= (point) e)
                (not (eobp)))
        (unless (looking-back "[[:space:]]" (1- (point)))
          (insert-char #x336)
          (setq e (1+ e)))
        (forward-char 1)))))

But maybe you're trying to display a certain face (as set through e.g. font-lock), then setting the strike-through property is the right way to do this. My terminal (rxvt-unicode) can display the composed characters too, but I can't get it to display a face with strike-through.

Upvotes: 2

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