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org-src: Use point instead of column for coords

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* lisp/org-src.el (org-src--coordinates)
(org-src--goto-coordinates): Use point instead of column.

Using a column-based approach fails to account for invisible regions
or display overlays that change the number of columns: for example,
showing a LaTeX \alpha as α.  In src edits which involve such
structures, this causes the point to be shifted undesirably.  By using
a point-based approach this issue does not occur.
This commit is contained in:
TEC 2021-04-28 18:17:00 +08:00 committed by Bastien Guerry
parent dcd7b576b7
commit 400d2d9fd7
1 changed files with 4 additions and 5 deletions
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lisp/org-src.el
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@ -327,8 +327,7 @@ a cons cell (LINE . COLUMN) or symbol `end'. See also
(cons (count-lines beg (line-beginning-position))
;; Column is relative to the end of line to avoid problems of
;; comma escaping or colons appended in front of the line.
(- (current-column)
(progn (end-of-line) (current-column)))))))
(- (point) (min end (line-end-position)))))))
(defun org-src--goto-coordinates (coord beg end)
"Move to coordinates COORD relatively to BEG and END.
@ -341,9 +340,9 @@ which see. BEG and END are buffer positions."
(org-with-wide-buffer
(goto-char beg)
(forward-line (car coord))
(end-of-line)
(org-move-to-column (max (+ (current-column) (cdr coord)) 0))
(point)))))
(max (point)
(+ (min end (line-end-position))
(cdr coord)))))))
(defun org-src--contents-area (datum)
"Return contents boundaries of DATUM.