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;;; helm-imenu.el --- Helm interface for Imenu
;; Copyright (C) 2012 Thierry Volpiatto <thierry.volpiatto@gmail.com>
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Code:
(require 'cl)
(require 'helm)
(require 'imenu)
(defgroup helm-imenu nil
"Imenu related libraries and applications for helm."
:group 'helm)
(defcustom helm-c-imenu-delimiter " / "
"Delimit type of candidates and his value in `helm-buffer'."
:group 'helm-imenu
:type 'string)
;;; Internals
(defvar helm-c-imenu-index-filter nil)
(make-variable-buffer-local 'helm-c-imenu-index-filter)
(defvar helm-c-cached-imenu-alist nil)
(make-variable-buffer-local 'helm-c-cached-imenu-alist)
(defvar helm-c-cached-imenu-candidates nil)
(make-variable-buffer-local 'helm-c-cached-imenu-candidates)
(defvar helm-c-cached-imenu-tick nil)
(make-variable-buffer-local 'helm-c-cached-imenu-tick)
(defun helm-imenu-create-candidates (entry)
"Create candidates with ENTRY."
(if (listp (cdr entry))
(mapcan
(lambda (sub)
(if (consp (cdr sub))
(mapcar
(lambda (subentry)
(concat (car entry) helm-c-imenu-delimiter subentry))
(helm-imenu-create-candidates sub))
(list (concat (car entry) helm-c-imenu-delimiter (car sub)))))
(cdr entry))
(list entry)))
(defvar helm-c-source-imenu
'((name . "Imenu")
(candidates . helm-c-imenu-candidates)
(persistent-action . (lambda (elm)
(helm-c-imenu-default-action elm)
(unless (fboundp 'semantic-imenu-tag-overlay)
(helm-match-line-color-current-line))))
(persistent-help . "Show this entry")
(action . helm-c-imenu-default-action))
"See (info \"(emacs)Imenu\")")
(defun helm-c-imenu-candidates ()
(with-helm-current-buffer
(let ((tick (buffer-modified-tick)))
(if (eq helm-c-cached-imenu-tick tick)
helm-c-cached-imenu-candidates
(setq imenu--index-alist nil)
(setq helm-c-cached-imenu-tick tick
helm-c-cached-imenu-candidates
(ignore-errors
(mapcan
'helm-imenu-create-candidates
(setq helm-c-cached-imenu-alist
(let ((index (imenu--make-index-alist)))
(if helm-c-imenu-index-filter
(funcall helm-c-imenu-index-filter index)
index))))))
(setq helm-c-cached-imenu-candidates
(mapcar #'(lambda (x)
(if (stringp x) x (car x)))
helm-c-cached-imenu-candidates))))))
(defun helm-c-imenu-default-action (elm)
"The default action for `helm-c-source-imenu'."
(let ((path (split-string elm helm-c-imenu-delimiter))
(alist helm-c-cached-imenu-alist))
(dolist (elm path)
(setq alist (assoc elm alist)))
(imenu alist)))
;;;###autoload
(defun helm-imenu ()
"Preconfigured `helm' for `imenu'."
(interactive)
(let ((imenu-auto-rescan t)
(imenu-default-goto-function
(if (fboundp 'semantic-imenu-goto-function)
'semantic-imenu-goto-function
'imenu-default-goto-function)))
(helm :sources 'helm-c-source-imenu
:buffer "*helm imenu*")))
(provide 'helm-imenu)
;; Local Variables:
;; byte-compile-warnings: (not cl-functions obsolete)
;; coding: utf-8
;; indent-tabs-mode: nil
;; End:
;;; helm-imenu.el ends here
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