diff options
| -rw-r--r-- | lisp/init-outline.el | 55 |
1 files changed, 53 insertions, 2 deletions
diff --git a/lisp/init-outline.el b/lisp/init-outline.el index 433ab0f..440db21 100644 --- a/lisp/init-outline.el +++ b/lisp/init-outline.el @@ -1,4 +1,54 @@ +(defun km/outline--parent-levels (n) + "Return list of parent levels. +4 -> (1 2 3) +1 -> nil" + (unless (> n 0) + (user-error "N must be positive")) + (let (parents) + (while (/= n 1) + (setq n (1- n)) + (push n parents)) + parents)) + +(defun km/outline-imenu-create-index () + "Generate Imenu index for headings. +This assumes that `outline-regexp' marks the characters that +indicate a heading, but not the text following it. The heading +text is taken as everything on the line after the +`outline-regexp' match (except for any leading whitespace)." + (goto-char (point-min)) + (let (path-alist ; ((level . heading)) + index) + (while (re-search-forward (concat "^" outline-regexp) nil t) + (let* ((head (replace-regexp-in-string + "\\`\\s-*" "" + (buffer-substring-no-properties (point) (point-at-eol)))) + (head-level (save-excursion (beginning-of-line) + (funcall outline-level))) + (parent-levels (km/outline--parent-levels head-level)) + (parent-heads + (delq nil (mapcar (lambda (n) (cdr (assoc n path-alist))) + parent-levels))) + (target (concat (mapconcat #'identity + (append parent-heads + (list head)) + " / ")))) + (unless (string= head "") + (push (cons target (save-excursion (beginning-of-line) (point-marker))) + index)) + (push (cons head-level head) path-alist))) + (nreverse index))) + +(defun km/outline-jump-to-heading () + "Jump to heading specified by `outline-regexp'." + (interactive) + (let ((imenu-create-index-function #'km/outline-imenu-create-index) + helm-cached-imenu-tick + helm-cached-imenu-alist + helm-cached-imenu-candidates) + (call-interactively #'helm-imenu))) + ;; Modified from https://github.com/abo-abo/hydra/wiki/Emacs (defhydra hydra-outline-mode (:hint nil) " @@ -7,7 +57,7 @@ _q_ sublevels _a_ all _u_ up _t_ body _e_ entry _n_ next visible _o_ other _i_ children _p_ previous visible _c_ entry _k_ branches _f_ forward same level -_l_ leaves _s_ subtree _b_ backward same level +_h_ leaves _s_ subtree _b_ backward same level _d_ subtree " @@ -15,7 +65,7 @@ _d_ subtree ("t" hide-body) ("o" hide-other) ("c" hide-entry) - ("l" hide-leaves) + ("h" hide-leaves) ("d" hide-subtree) ("a" show-all) @@ -30,6 +80,7 @@ _d_ subtree ("f" outline-forward-same-level) ("b" outline-backward-same-level) + ("l" km/outline-jump-to-heading "jump" :color blue) ("m" outline-mark-subtree "mark" :color blue)) (defun km/hydra-outline-mode () |