Quickly jumping to symbols
September 3, 2008
This is brilliant.
For a while, I have been using ido to quickly jump between buffers and files by just typing any part of the file/buffer name I want. In fact, typing any sequence of letters narrows the interactive search to candidates with names that contain those letters in that order:
fb -> Foobar, FrancisGailBrown
But for finding method definitions in a big source file, I have always just used isearch. It turns out that there is a better way.
By combining imenu with ido, I can quickly find methods as well:
All it takes is this method in my init.el:
(defun ido-goto-symbol () "Will update the imenu index and then use ido to select a symbol to navigate to" (interactive) (imenu--make-index-alist) (let ((name-and-pos '()) (symbol-names '())) (flet ((addsymbols (symbol-list) (when (listp symbol-list) (dolist (symbol symbol-list) (let ((name nil) (position nil)) (cond ((and (listp symbol) (imenu--subalist-p symbol)) (addsymbols symbol)) ((listp symbol) (setq name (car symbol)) (setq position (cdr symbol))) ((stringp symbol) (setq name symbol) (setq position (get-text-property 1 'org-imenu-marker symbol)))) (unless (or (null position) (null name)) (add-to-list 'symbol-names name) (add-to-list 'name-and-pos (cons name position)))))))) (addsymbols imenu--index-alist)) (let* ((selected-symbol (ido-completing-read "Symbol? " symbol-names)) (position (cdr (assoc selected-symbol name-and-pos)))) (goto-char position))))
I have bound it to C-t, because I realized that I don’t use transpose-chars (or whichever transpose method was there..I don’t use any of those, really).
I found this trick on the imenu wiki page.