;;; imenu.el --- framework for mode-specific buffer indexes -*- lexical-binding: t -*-
-;; Copyright (C) 1994-1998, 2001-2015 Free Software Foundation, Inc.
+;; Copyright (C) 1994-1998, 2001-2016 Free Software Foundation, Inc.
;; Author: Ake Stenhoff <etxaksf@aom.ericsson.se>
;; Lars Lindberg <lli@sypro.cap.se>
;;; Lisp
;;;
+(define-error 'imenu-unavailable "imenu unavailable")
+
+(defun imenu-unavailable-error (format &rest args)
+ (signal 'imenu-unavailable
+ (list (apply #'format-message format args))))
+
(defun imenu-example--lisp-extract-index-name ()
;; Example of a candidate for `imenu-extract-index-name-function'.
;; This will generate a flat index of definitions in a lisp file.
Simple elements in the alist look like (INDEX-NAME . POSITION).
POSITION is the buffer position of the item; to go to the item
is simply to move point to that position.
-POSITION is passed to `imenu-default-goto-function', so it can be a non-number
-if that variable has been changed (e.g. Semantic uses overlays for POSITIONs).
-Special elements look like (INDEX-NAME POSITION FUNCTION ARGUMENTS...).
-To \"go to\" a special element means applying FUNCTION
-to INDEX-NAME, POSITION, and the ARGUMENTS.
+POSITION is passed to `imenu-default-goto-function', so it can be
+a non-number if that variable has been changed (e.g. Semantic
+uses overlays for POSITIONs).
+
+Special elements look like
+\(INDEX-NAME POSITION FUNCTION ARGUMENTS...).
+To \"go to\" a special element means applying FUNCTION to
+INDEX-NAME, POSITION, and the ARGUMENTS.
A nested sub-alist element looks like (INDEX-NAME . SUB-ALIST).
The function `imenu--subalist-p' tests an element and returns t
(defvar imenu--history-list nil
;; Making this buffer local caused it not to work!
- "History list for 'jump-to-function-in-buffer'.")
+ "History list for `jump-to-function-in-buffer'.")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
(let ((pos (point))
(total (buffer-size)))
(and reverse (setq pos (- total pos)))
- (if (> total 50000)
- ;; Avoid overflow from multiplying by 100!
- (/ (1- pos) (max (/ total 100) 1))
- (/ (* 100 (1- pos)) (max total 1)))))
+ (floor (* 100.0 (1- pos)) (max total 1))))
(defun imenu--split (list n)
"Split LIST into sublists of max length N.
-Example (imenu--split '(1 2 3 4 5 6 7 8) 3)-> '((1 2 3) (4 5 6) (7 8))
+Example (imenu--split \\='(1 2 3 4 5 6 7 8) 3) => ((1 2 3) (4 5 6) (7 8))
The returned list DOES NOT share structure with LIST."
(let ((remain list)
(result '())
(funcall imenu-create-index-function))))
(imenu--truncate-items imenu--index-alist)))
(or imenu--index-alist noerror
- (user-error "No items suitable for an index found in this buffer"))
+ (imenu-unavailable-error
+ "No items suitable for an index found in this buffer"))
(or imenu--index-alist
(setq imenu--index-alist (list nil)))
;; Add a rescan option to the index.
((and imenu-generic-expression)
(imenu--generic-function imenu-generic-expression))
(t
- (user-error "This buffer cannot use `imenu-default-create-index-function'"))))
+ (imenu-unavailable-error "This buffer cannot use `imenu-default-create-index-function'"))))
;;;
;;; Generic index gathering function.
(setq result t imenu--index-alist nil)))
result))
+(defvar-local imenu--menubar-keymap nil)
+
;;;###autoload
(defun imenu-add-to-menubar (name)
"Add an `imenu' entry to the menu bar for the current buffer.
(let ((newmap (make-sparse-keymap)))
(set-keymap-parent newmap (current-local-map))
(setq imenu--last-menubar-index-alist nil)
+ (setq imenu--menubar-keymap (make-sparse-keymap "Imenu"))
(define-key newmap [menu-bar index]
- `(menu-item ,name ,(make-sparse-keymap "Imenu")))
+ `(menu-item ,name ,imenu--menubar-keymap))
(use-local-map newmap)
(add-hook 'menu-bar-update-hook 'imenu-update-menubar)))
- (user-error "The mode `%s' does not support Imenu"
- (format-mode-line mode-name))))
+ (imenu-unavailable-error "The mode `%s' does not support Imenu"
+ (format-mode-line mode-name))))
;;;###autoload
(defun imenu-add-menubar-index ()
(defun imenu-update-menubar ()
(when (and (current-local-map)
- (keymapp (lookup-key (current-local-map) [menu-bar index]))
+ imenu--menubar-keymap
(/= (buffer-chars-modified-tick) imenu-menubar-modified-tick))
(setq imenu-menubar-modified-tick (buffer-chars-modified-tick))
(let ((index-alist (imenu--make-index-alist t)))
;; Don't bother updating if the index-alist has not changed
;; since the last time we did it.
(unless (equal index-alist imenu--last-menubar-index-alist)
- (let (menu menu1 old)
- (setq imenu--last-menubar-index-alist index-alist)
- (setq index-alist (imenu--split-submenus index-alist))
- (setq menu (imenu--split-menu index-alist
- (buffer-name)))
- (setq menu1 (imenu--create-keymap (car menu)
+ (setq imenu--last-menubar-index-alist index-alist)
+ (setq index-alist (imenu--split-submenus index-alist))
+ (let* ((menu (imenu--split-menu index-alist
+ (buffer-name)))
+ (menu1 (imenu--create-keymap (car menu)
(cdr (if (< 1 (length (cdr menu)))
menu
(car (cdr menu))))
- 'imenu--menubar-select))
- (setq old (lookup-key (current-local-map) [menu-bar index]))
- ;; This should never happen, but in some odd cases, potentially,
- ;; lookup-key may return a dynamically composed keymap.
- (if (keymapp (cadr old)) (setq old (cadr old)))
- (setcdr old (cdr menu1)))))))
+ 'imenu--menubar-select)))
+ (setcdr imenu--menubar-keymap (cdr menu1)))))))
(defun imenu--menubar-select (item)
"Use Imenu to select the function or variable named in this menu ITEM."
(if (stringp index-item)
(setq index-item (assoc index-item (imenu--make-index-alist))))
(when index-item
- (push-mark nil t)
- (let* ((is-special-item (listp (cdr index-item)))
- (function
- (if is-special-item
- (nth 2 index-item) imenu-default-goto-function))
- (position (if is-special-item
- (cadr index-item) (cdr index-item)))
- (args (if is-special-item (cdr (cddr index-item)))))
- (apply function (car index-item) position args))
- (run-hooks 'imenu-after-jump-hook)))
+ (pcase index-item
+ (`(,name ,pos ,fn . ,args)
+ (push-mark nil t)
+ (apply fn name pos args)
+ (run-hooks 'imenu-after-jump-hook))
+ (`(,name . ,pos) (imenu (list name pos imenu-default-goto-function)))
+ (_ (error "Unknown imenu item: %S" index-item)))))
(provide 'imenu)