1 files changed, 47 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..f39cad4
--- /dev/null
+++ b/.config/emacs/site-lisp/marker.el
@@ -0,0 +1,47 @@
+(require 'hi-lock)
+(require 'seq)
+
+(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)
+    (overlay-put ov 'marker--mark-p t)))
+
+(defun marker-unmark ()
+  (interactive)
+  (if (use-region-p)
+      (marker-unmark-region (region-bounds))
+    (marker-clear))
+  (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) (overlay-get ov 'marker--mark-p))
+                          (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)
+  (remove-overlays nil nil 'marker--mark-p t))
+
+(provide 'marker)