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Re: Replacing buffer contents --- without disturbing markers
From: |
David Kastrup |
Subject: |
Re: Replacing buffer contents --- without disturbing markers |
Date: |
Sat, 11 Sep 2010 08:32:35 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
Daniel Colascione <address@hidden> writes:
> For a mode I'm writing, I have to temporarily replace certain parts of
> the buffer with placeholder text. I'm using this function to do it:
>
> (defun ntcmd-inplace-replace (replacement)
> "Replace the characters at point with REPLACEMENT without disturbing
> markers.
>
> Leave point after replacement. The number of characters replaced
> is the length of REPLACEMENT."
>
> (loop for c across replacement
> ;; Replace the character after point with the next character
> ;; from replacement. We must worry about two kinds
> ;; of marker: those pointing at point (including (point)), and
> ;; those pointing at (1+ (point)).
> ;;
> ;; Mentally run through the code below, and you'll see that
> ;; both kinds of marker are preserved.
> ;;
> do (progn
> (forward-char 1)
> (insert-before-markers c)
> (backward-char 1)
> (delete-char -1)
> (forward-char 1))))
>
> Is it possible to do better? replace-match squashes markers.
Not sure whether make-indirect-buffer would keep the markers in piece.
--
David Kastrup