Hi Stefan,
I want something for octave mode that looks like something in the
attached screenshot. But since this is generic I would like to put it in
smie.el. Do you have any objections or comments?
It doesn't make sense for this feature and smie-blink-matching-open to
be on at the same time. So in the patch nothing is enabled.
diff --git a/lisp/emacs-lisp/smie.el b/lisp/emacs-lisp/smie.el
index bbdd9f83..ad23f78c 100644
--- a/lisp/emacs-lisp/smie.el
+++ b/lisp/emacs-lisp/smie.el
@@ -1021,6 +1021,61 @@ (defun smie-blink-matching-open ()
(let ((blink-matching-check-function #'smie-blink-matching-check))
(blink-matching-open))))))))
+(defface smie-matching-block-highlight (:inherit highlight)
+ "Face used to highlight matching block."
+ :group 'smie)
+
+(defvar-local smie-highlight-matching-block-overlay nil)
+(defvar-local smie-highlight-matching-block-lastpos -1)
+
+(defun smie-highlight-matching-block ()
+ (when (and (bound-and-true-p smie-closer-alist)
+ (/= (point) smie-highlight-matching-block-lastpos))
+ (unless (overlayp smie-highlight-matching-block-overlay)
+ (setq smie-highlight-matching-block-overlay
+ (make-overlay (point) (point))))
+ (setq smie-highlight-matching-block-lastpos (point))
+ (let ((open-re (concat "\\_<"
+ (regexp-opt (mapcar 'car smie-closer-alist))
+ "\\_>"))
+ (close-re (concat "\\_<"
+ (regexp-opt (mapcar 'cdr smie-closer-alist))
+ "\\_>"))
+ (beg-of-tok
+ (lambda (re)
+ "Move to the beginning of current token if matching RE."
+ (or (looking-at-p re)
+ (let* ((start (point))
+ (beg (progn
+ (funcall smie-backward-token-function)
+ (and (looking-at-p re) (point))))
+ (end (and beg
+ (progn
+ (funcall smie-forward-token-function)
+ (point)))))
+ (if (and beg (<= beg start) (<= start end))
+ (goto-char beg)
+ (goto-char start)
+ nil)))))
+ (highlight (lambda (beg end)
+ (move-overlay smie-highlight-matching-block-overlay
+ beg end)
+ (overlay-put smie-highlight-matching-block-overlay
+ 'face 'smie-matching-block-highlight))))
+ (save-excursion
+ (cond
+ ((funcall beg-of-tok open-re)
+ (with-demoted-errors
+ (forward-sexp 1)
+ (when (looking-back close-re)
+ (funcall highlight (match-beginning 0) (match-end 0)))))
+ ((funcall beg-of-tok close-re)
+ (funcall smie-forward-token-function)
+ (forward-sexp -1)
+ (when (looking-at open-re)
+ (funcall highlight (match-beginning 0) (match-end 0))))
+ (t (overlay-put smie-highlight-matching-block-overlay 'face nil)))))))
+
;;; The indentation engine.
(defcustom smie-indent-basic 4
smie-highlight.png
Description: smie-highlight.png
--- End Message ---