Created
January 14, 2020 04:22
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hide src delimiters in org mode
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(with-eval-after-load 'org | |
(defvar-local rasmus/org-at-src-begin -1 | |
"Variable that holds whether last position was a ") | |
(defvar rasmus/ob-header-symbol ?☰ | |
"Symbol used for babel headers") | |
(defun rasmus/org-prettify-src--update () | |
(let ((case-fold-search t) | |
(re "^[ \t]*#\\+begin_src[ \t]+[^ \f\t\n\r\v]+[ \t]*") | |
found) | |
(save-excursion | |
(goto-char (point-min)) | |
(while (re-search-forward re nil t) | |
(goto-char (match-end 0)) | |
(let ((args (org-trim | |
(buffer-substring-no-properties (point) | |
(line-end-position))))) | |
(when (org-string-nw-p args) | |
(let ((new-cell (cons args rasmus/ob-header-symbol))) | |
(cl-pushnew new-cell prettify-symbols-alist :test #'equal) | |
(cl-pushnew new-cell found :test #'equal))))) | |
(setq prettify-symbols-alist | |
(cl-set-difference prettify-symbols-alist | |
(cl-set-difference | |
(cl-remove-if-not | |
(lambda (elm) | |
(eq (cdr elm) rasmus/ob-header-symbol)) | |
prettify-symbols-alist) | |
found :test #'equal))) | |
;; Clean up old font-lock-keywords. | |
(font-lock-remove-keywords nil prettify-symbols--keywords) | |
(setq prettify-symbols--keywords (prettify-symbols--make-keywords)) | |
(font-lock-add-keywords nil prettify-symbols--keywords) | |
(while (re-search-forward re nil t) | |
(font-lock-flush (line-beginning-position) (line-end-position)))))) | |
(defun rasmus/org-prettify-src () | |
"Hide src options via `prettify-symbols-mode'. | |
`prettify-symbols-mode' is used because it has uncollpasing. It's | |
may not be efficient." | |
(let* ((case-fold-search t) | |
(at-src-block (save-excursion | |
(beginning-of-line) | |
(looking-at "^[ \t]*#\\+begin_src[ \t]+[^ \f\t\n\r\v]+[ \t]*")))) | |
;; Test if we moved out of a block. | |
(when (or (and rasmus/org-at-src-begin | |
(not at-src-block)) | |
;; File was just opened. | |
(eq rasmus/org-at-src-begin -1)) | |
(rasmus/org-prettify-src--update)) | |
;; Remove composition if at line; doesn't work properly. | |
;; (when at-src-block | |
;; (with-silent-modifications | |
;; (remove-text-properties (match-end 0) | |
;; (1+ (line-end-position)) | |
;; '(composition)))) | |
(setq rasmus/org-at-src-begin at-src-block))) | |
(defun rasmus/org-prettify-symbols () | |
(mapc (apply-partially 'add-to-list 'prettify-symbols-alist) | |
(cl-reduce 'append | |
(mapcar (lambda (x) (list x (cons (upcase (car x)) (cdr x)))) | |
`(("#+begin_src" . ?✎) ;; ➤ 🖝 ➟ ➤ ✎ | |
("#+end_src" . ?□) ;; ⏹ | |
("#+header:" . ,rasmus/ob-header-symbol) | |
("#+begin_quote" . ?») | |
("#+end_quote" . ?«))))) | |
(turn-on-prettify-symbols-mode) | |
(add-hook 'post-command-hook 'rasmus/org-prettify-src t t)) | |
(add-hook 'org-mode-hook #'rasmus/org-prettify-symbols) |
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