diff options
| -rw-r--r-- | .config/emacs/site-lisp/marker.el | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/.config/emacs/site-lisp/marker.el b/.config/emacs/site-lisp/marker.el new file mode 100644 index 0000000..5bc1dd2 --- /dev/null +++ b/.config/emacs/site-lisp/marker.el @@ -0,0 +1,50 @@ +(require 'hi-lock) +(require 'seq) + +(defvar-local marker--overlays nil) + +(defun marker-mark () + (interactive) + (marker-mark-region (if (use-region-p) + (region-bounds) + `((,(pos-bol) . ,(pos-eol))))) + (when (region-active-p) + (deactivate-mark))) + +(defun marker-mark-region (bounds) + (dolist (x bounds) (marker--mark-region (car x) (cdr x)))) + +(defun marker--mark-region (beg end) + (let ((ov (make-overlay beg end nil :front-advance))) + (overlay-put ov 'priority 1) + (overlay-put ov 'face 'hi-yellow) + (overlay-put ov 'evaporate t) + (push ov marker--overlays))) + +(defun marker-unmark () + (interactive) + (marker-unmark-region (if (use-region-p) + (region-bounds) + `((,(pos-bol) . ,(pos-eol))))) + (when (region-active-p) + (deactivate-mark))) + +(defun marker-unmark-region (bounds) + (dolist (x bounds) (marker--unmark-region (car x) (cdr x)))) + +(defun marker--unmark-region (beg end) + (dolist (ov (seq-filter (lambda (ov) (memq ov marker--overlays)) + (overlays-in beg end))) + (cond ((< (overlay-start ov) beg) + (move-overlay ov (overlay-start ov) beg)) + ((> (overlay-end ov) end) + (move-overlay ov end (overlay-end ov))) + (:else + (delete-overlay ov))))) + +(defun marker-clear () + (interactive) + (mapc #'delete-overlay marker--overlays) + (setq marker--overlays nil)) + +(provide 'marker) |