"Add an after-string property to OVERLAY.
The property's value is a string of spaces with background
COLORS applied to each one."
- (overlay-put overlay 'beacon-colors colors)
- (overlay-put overlay 'after-string
- (mapconcat (lambda (c) (propertize " " 'face (list :background c)))
- colors
- "")))
+ (if (not colors)
+ (delete-overlay overlay)
+ (overlay-put overlay 'beacon-colors colors)
+ (overlay-put overlay 'after-string
+ (propertize
+ (mapconcat (lambda (c) (propertize " " 'face (list :background c)))
+ colors
+ "")
+ 'cursor 1000))))
(defun beacon--after-string-overlay (colors)
"Put an overlay at point with an after-string property.
(push ov beacon--ovs)))
(defun beacon--ov-at-point ()
- (car (cl-member-if (lambda (o) (overlay-get o 'beacon))
- (overlays-at (point)))))
+ (car (or (cl-member-if (lambda (o) (overlay-get o 'beacon))
+ (overlays-in (point) (point)))
+ (cl-member-if (lambda (o) (overlay-get o 'beacon))
+ (overlays-at (point))))))
(defun beacon--vanish ()
"Turn off the beacon."
(defun beacon--dec ()
"Decrease the beacon brightness by one."
- (let ((o (beacon--ov-at-point)))
- (if (not o)
- (beacon--vanish)
- (delete-overlay o)
- (save-excursion
- (while (progn (forward-char 1)
- (setq o (beacon--ov-at-point)))
- (let ((colors (overlay-get o 'beacon-colors)))
- (if (not colors)
- (move-overlay o (1- (point)) (point))
- (forward-char -1)
- (beacon--colored-overlay (pop colors))
- (beacon--ov-put-after-string o colors))))))))
+ (pcase (beacon--ov-at-point)
+ (`nil (beacon--vanish))
+ ((and o (let c (overlay-get o 'beacon-colors)) (guard c))
+ (beacon--ov-put-after-string o (cdr c)))
+ (o
+ (delete-overlay o)
+ (save-excursion
+ (while (progn (forward-char 1)
+ (setq o (beacon--ov-at-point)))
+ (let ((colors (overlay-get o 'beacon-colors)))
+ (if (not colors)
+ (move-overlay o (1- (point)) (point))
+ (forward-char -1)
+ (beacon--colored-overlay (pop colors))
+ (beacon--ov-put-after-string o colors)
+ (forward-char 1))))))))
(defun beacon-blink ()
"Blink the beacon at the position of the cursor."