This page refers to an older version of Emacs!
These days, you can use
‘M-s o’ while using isearch to run occur on the current search term!
(defun isearch-occur () "Invoke `occur' from within isearch." (interactive) (let ((case-fold-search isearch-case-fold-search)) (occur (if isearch-regexp isearch-string (regexp-quote isearch-string)))))
Assign the command to a key in Isearch:
(define-key isearch-mode-map (kbd "C-o") 'isearch-occur)
Note that in Emacs 22 all Isearch matches are highlighted anyway, but this can still be useful for accessing specific hits and for quickly seeing a summary of all the hits in a single buffer.
When I found this I was quite happy but using it the occur buffer sometimes irritated me. The point is, when I start isearch, open the occur buffer and then quit the search I felt like the occur buffer should go away. Not only that, I wanted my old window configuration restored. Thus I came up with the following (with help from ScottJaderholm?)
(defvar ska-isearch-occur-opened nil) (defvar ska-isearch-window-configuration nil) (defun ska-isearch-occur () (interactive) (when (fboundp 'occur) (setq ska-isearch-occur-opened t) (let ((case-fold-search isearch-case-fold-search)) (occur (if isearch-regexp isearch-string (regexp-quote isearch-string)))))) (defun ska-isearch-maybe-remove-occur-buffer () "Restore window-configuration when quitting isearch. This function is meant to be used together with a function storing the window configuration into a variable and together with a setup opening the occur buffer from within isearch. This function ... - will do nothing if you you did not cancel the search, - will kill the occur buffer if occur buffer was opened from isearch, - will restore your old window configuration when you saved it in `isearch-mode-hook'." (interactive) (let ((occ-buffer (get-buffer "*Occur*"))) (when (and ska-isearch-occur-opened isearch-mode-end-hook-quit (buffer-live-p occ-buffer)) (kill-buffer occ-buffer) (when (and ska-isearch-window-configuration (window-configuration-p (car ska-isearch-window-configuration))) (set-window-configuration (car ska-isearch-window-configuration)) (goto-char (cadr ska-isearch-window-configuration)))))) (add-hook 'isearch-mode-hook '(lambda () (setq ska-isearch-window-configuration (list (current-window-configuration) (point-marker))))) (add-hook 'isearch-mode-end-hook '(lambda () (ska-isearch-maybe-remove-occur-buffer) (setq ska-isearch-occur-opened nil))) (define-key isearch-mode-map (kbd "M-o") 'ska-isearch-occur)
Please note that at the time of this writing the code is very fresh not heavily tested.