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add: clear unmodified fields when inserting text at the beginning

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This commit is contained in:
Joao Tavora 2013-10-20 12:28:03 +01:00
parent 54e93b60e9
commit 0daac695e2
1 changed files with 12 additions and 3 deletions
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15
snippet.el
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@ -348,7 +348,8 @@ can be:
(:include snippet--object)
(:print-function snippet--describe-field))
name
(mirrors '()))
(mirrors '())
(modified-p nil))
(defun snippet--describe-field (field)
(with-current-buffer (snippet--object-buffer field)
@ -507,8 +508,8 @@ can be:
(snippet--object-end field))
(overlay-put snippet--field-overlay 'snippet--field field))
(defun snippet--field-overlay-changed (overlay after? _beg _end
&optional _length)
(defun snippet--field-overlay-changed (overlay after? beg end
&optional pre-change-len)
;; there's a slight (apparently innocuous) bug here: if the overlay has
;; zero-length, both `insert-in-front' and `insert-behind' modification hooks
;; are called
@ -516,6 +517,14 @@ can be:
(let* ((field (overlay-get overlay 'snippet--field))
(inhibit-modification-hooks t))
(cond (after?
(when (and (not (snippet--field-modified-p field))
(= beg (snippet--field-start field))
(zerop pre-change-len))
(delete-region end
(snippet--object-end field)))
(setf (snippet--field-modified-p field) t)
(mapc #'snippet--update-mirror (snippet--field-mirrors field))
(move-overlay overlay
(snippet--object-start field)