;;; imenu.el --- Framework for mode-specific buffer indexes.
-;; Copyright (C) 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
;; Author: Ake Stenhoff <etxaksf@aom.ericsson.se>
;; Lars Lindberg <lli@sypro.cap.se>
;; Created: 8 Feb 1994
-;; Version: 1.7
;; Keywords: tools
-;;
-;; This program is free software; you can redistribute it and/or modify
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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 2, or (at your option)
;; any later version.
-;;
-;; This program is distributed in the hope that it will be useful,
+
+;; GNU Emacs 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, write to the Free Software
-;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Commentary:
-;;
+
;; Purpose of this package:
;; To present a framework for mode-specific buffer indexes.
;; A buffer index is an alist of names and buffer positions.
;; The package comes with a set of example functions for how to
;; utilize this package.
-;; There are *examples* for index gathering functions for C/C++ and
-;; Lisp/Emacs Lisp but it is easy to customize for other modes. A
-;; function for jumping to the chosen index position is also
-;; supplied.
-
-;;; Change Log:
-;; v1.7 Apr 12 1994 Ake Stenhoff
-;; Changed doc strings refering to symbols.
-;; Require 'cl' when compiling only.
-;; Only uses 'cl' macros.
-;; v1.6 Feb 28 1994 Ake Stenhoff
-;; Added alist as an optional argument to
-;; 'imenu-choose-buffer-index'.
-;; Thanks [dean].
-;; v1.5 Feb 25 1994 Ake Stenhoff
-;; Added code to parse DEFSTRUCT, DEFCLASS, DEFTYPE,
-;; DEFINE-CONDITION in the lisp example function.
-;; Thanks [simon].
-;; v1.4 Feb 18 1994 Ake Stenhoff
-;; Added 'imenu-create-submenu-name' for creating a submenu name.
-;; This is for getting a general look of submenu names.
-;; Added variable 'imenu-submenu-name-format' used by
-;; 'imenu-create-submenu-name'.
-;; v1.3 Feb 17 1994 Lars Lindberg
-;; Added 'imenu--flatten-index-alist' for flatten nexted index
-;; alists.
-;; New examples for lisp mode that utilizes the features better.
-;; Added the variable 'imenu-space-replacement'.
-;; The completion-buffer version of the index menu now replaces
-;; spaces in the index-names to make tokens of them.
-;; v1.2 Feb 14 1994 Ake Stenhoff & Lars Lindberg
-;; Now handles nested index lists.
-;; v1.1 Feb 9 1994 Ake Stenhoff & Lars Lindberg
-;; Better comments (?).
-;; v1.0 Feb 8 1994 Ake Stenhoff & Lars Lindberg
-;; Based on func-menu.el 3.5.
+;; There are *examples* for index gathering functions/regular
+;; expressions for C/C++ and Lisp/Emacs Lisp but it is easy to
+;; customize for other modes. A function for jumping to the chosen
+;; index position is also supplied.
;;; Thanks goes to
;; [simon] - Simon Leinen simon@lia.di.epfl.ch
;; [dean] - Dean Andrews ada@unison.com
-;;
+;; [alon] - Alon Albert al@mercury.co.il
+;; [greg] - Greg Thompson gregt@porsche.visix.COM
+;; [wolfgang] - Wolfgang Bangerth zcg51122@rpool1.rus.uni-stuttgart.de
+;; [kai] - Kai Grossjohann grossjoh@linus.informatik.uni-dortmund.de
+;; [david] - David M. Smith dsmith@stats.adelaide.edu.au
+;; [christian] - Christian Egli Christian.Egli@hcsd.hac.com
+;; [karl] - Karl Fogel kfogel@floss.life.uiuc.edu
;;; Code
+
(eval-when-compile (require 'cl))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(defvar imenu-auto-rescan nil
+ "*Non-nil means Imenu should always rescan the buffers.")
+
+(defvar imenu-auto-rescan-maxout 60000
+ "* auto-rescan is disabled in buffers larger than this.
+This variable is buffer-local.")
+
(defvar imenu-always-use-completion-buffer-p nil
"*Set this to non-nil for displaying the index in a completion buffer.
Non-nil means always display the index in a completion buffer.
Nil means display the index as a mouse menu when the mouse was
-used to invoke `imenu'.")
+used to invoke `imenu'.
+`never' means never automatically display a listing of any kind.")
(defvar imenu-sort-function nil
"*The function to use for sorting the index mouse-menu.
\(NAME . POSITION). Look at `imenu--sort-by-name' for an example.")
(defvar imenu-max-items 25
- "*Maximum number of elements in an index mouse-menu.")
+ "*Maximum number of elements in an mouse menu for Imenu.")
-(defvar imenu-scanning-message "Scanning buffer for index. (%3d%%)"
+(defvar imenu-scanning-message "Scanning buffer for index (%3d%%)"
"*Progress message during the index scanning of the buffer.
-If non NIL, user gets a message during the scanning of the buffer
+If non-nil, user gets a message during the scanning of the buffer
Relevant only if the mode-specific function that creates the buffer
index use `imenu-progress-message'.")
Used for making mouse-menu titles and for flattening nested indexes
with name concatenation.")
-(defvar imenu-submenu-name-format "%s..."
- "*The format for making a submenu name.")
+;;;###autoload
+(defvar imenu-generic-expression nil
+ "The regex pattern to use for creating a buffer index.
+
+If non-nil this pattern is passed to `imenu-create-index-with-pattern'
+to create a buffer index.
+
+The value should be an alist with elements that look like this:
+ (MENU-TITLE REGEXP INDEX)
+or like this:
+ (MENU-TITLE REGEXP INDEX FUNCTION ARGUMENTS...)
+with zero or more ARGUMENTS. The former format creates a simple element in
+the index alist when it matches; the latter creates a special element
+of the form (NAME FUNCTION NAME POSITION-MARKER ARGUMENTS...)
+with FUNCTION and ARGUMENTS beiong copied from `imenu-generic-expression'.
+
+MENU-TITLE is a string used as the title for the submenu or nil if the
+entries are not nested.
+
+REGEXP is a regexp that should match a construct in the buffer that is
+to be displayed in the menu; i.e., function or variable definitions,
+etc. It contains a substring which is the name to appear in the
+menu. See the info section on Regexps for more information.
+
+INDEX points to the substring in REGEXP that contains the name (of the
+function, variable or type) that is to appear in the menu.
+
+For emacs-lisp-mode for example PATTERN would look like:
+
+'((nil \"^\\\\s-*(def\\\\(un\\\\|subst\\\\|macro\\\\|advice\\\\)\\\\s-+\\\\([-A-Za-z0-9+]+\\\\)\" 2)
+ (\"*Vars*\" \"^\\\\s-*(def\\\\(var\\\\|const\\\\)\\\\s-+\\\\([-A-Za-z0-9+]+\\\\)\" 2)
+ (\"*Types*\" \"^\\\\s-*(def\\\\(type\\\\|struct\\\\|class\\\\|ine-condition\\\\)\\\\s-+\\\\([-A-Za-z0-9+]+\\\\)\" 2))
+
+The variable is buffer-local.")
+
+;;;###autoload
+(make-variable-buffer-local 'imenu-generic-expression)
;;;; Hooks
"The function to use for creating a buffer index.
It should be a function that takes no arguments and returns an index
-of the current buffer as an alist. The elements in the alist look
-like: (INDEX-NAME . INDEX-POSITION). You may also nest index list like
-\(INDEX-NAME . INDEX-ALIST).
+of the current buffer as an alist.
+
+Simple elements in the alist look like (INDEX-NAME . INDEX-POSITION).
+Special elements look like (INDEX-NAME FUNCTION ARGUMENTS...).
+A nested sub-alist element looks like (INDEX-NAME SUB-ALIST).
+The function `imenu--subalist-p' tests an element and returns t
+ if it is a sub-alist.
This function is called within a `save-excursion'.
file.
The function should leave point at the place to be connected to the
-index and it should return nil when it doesn't find another index. ")
+index and it should return nil when it doesn't find another index.")
(make-variable-buffer-local 'imenu-prev-index-position-function)
(defvar imenu-extract-index-name-function nil
`imenu-prev-index-position-function'.")
(make-variable-buffer-local 'imenu-extract-index-name-function)
+(defun imenu--subalist-p (item)
+ (and (consp (cdr item)) (listp (cadr item))
+ (not (eq (caadr item) 'lambda))))
+
+;;;
+;;; Macro to display a progress message.
+;;; RELPOS is the relative position to display.
+;;; If RELPOS is nil, then the relative position in the buffer
+;;; is calculated.
+;;; PREVPOS is the variable in which we store the last position displayed.
+(defmacro imenu-progress-message (prevpos &optional relpos reverse)
+ (` (and
+ imenu-scanning-message
+ (let ((pos (, (if relpos
+ relpos
+ (` (imenu--relative-position (, reverse)))))))
+ (if (, (if relpos t
+ (` (> pos (+ 5 (, prevpos))))))
+ (progn
+ (message imenu-scanning-message pos)
+ (setq (, prevpos) pos)))))))
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;;;
+;;;; Some examples of functions utilizing the framework of this
+;;;; package.
+;;;;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; Return the current/previous sexp and the location of the sexp (its
+;; beginning) without moving the point.
+(defun imenu-example--name-and-position ()
+ (save-excursion
+ (forward-sexp -1)
+ (let ((beg (point))
+ (end (progn (forward-sexp) (point)))
+ (marker (make-marker)))
+ (set-marker marker beg)
+ (cons (buffer-substring beg end)
+ marker))))
+
+;;;
+;;; Lisp
+;;;
+
+(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.
+ (save-match-data
+ (and (looking-at "(def")
+ (condition-case nil
+ (progn
+ (down-list 1)
+ (forward-sexp 2)
+ (let ((beg (point))
+ (end (progn (forward-sexp -1) (point))))
+ (buffer-substring beg end)))
+ (error nil)))))
+
+(defun imenu-example--create-lisp-index ()
+ ;; Example of a candidate for `imenu-create-index-function'.
+ ;; It will generate a nested index of definitions.
+ (let ((index-alist '())
+ (index-var-alist '())
+ (index-type-alist '())
+ (index-unknown-alist '())
+ prev-pos)
+ (goto-char (point-max))
+ (imenu-progress-message prev-pos 0)
+ ;; Search for the function
+ (while (beginning-of-defun)
+ (imenu-progress-message prev-pos nil t)
+ (save-match-data
+ (and (looking-at "(def")
+ (save-excursion
+ (down-list 1)
+ (cond
+ ((looking-at "def\\(var\\|const\\)")
+ (forward-sexp 2)
+ (push (imenu-example--name-and-position)
+ index-var-alist))
+ ((looking-at "def\\(un\\|subst\\|macro\\|advice\\)")
+ (forward-sexp 2)
+ (push (imenu-example--name-and-position)
+ index-alist))
+ ((looking-at "def\\(type\\|struct\\|class\\|ine-condition\\)")
+ (forward-sexp 2)
+ (if (= (char-after (1- (point))) ?\))
+ (progn
+ (forward-sexp -1)
+ (down-list 1)
+ (forward-sexp 1)))
+ (push (imenu-example--name-and-position)
+ index-type-alist))
+ (t
+ (forward-sexp 2)
+ (push (imenu-example--name-and-position)
+ index-unknown-alist)))))))
+ (imenu-progress-message prev-pos 100)
+ (and index-var-alist
+ (push (cons "Variables" index-var-alist)
+ index-alist))
+ (and index-type-alist
+ (push (cons "Types" index-type-alist)
+ index-alist))
+ (and index-unknown-alist
+ (push (cons "Syntax-unknown" index-unknown-alist)
+ index-alist))
+ index-alist))
+
+;; Regular expression to find C functions
+(defvar imenu-example--function-name-regexp-c
+ (concat
+ "^[a-zA-Z0-9]+[ \t]?" ; type specs; there can be no
+ "\\([a-zA-Z0-9_*]+[ \t]+\\)?" ; more than 3 tokens, right?
+ "\\([a-zA-Z0-9_*]+[ \t]+\\)?"
+ "\\([*&]+[ \t]*\\)?" ; pointer
+ "\\([a-zA-Z0-9_*]+\\)[ \t]*(" ; name
+ ))
+
+(defun imenu-example--create-c-index (&optional regexp)
+ (let ((index-alist '())
+ prev-pos char)
+ (goto-char (point-min))
+ (imenu-progress-message prev-pos 0)
+ ;; Search for the function
+ (save-match-data
+ (while (re-search-forward
+ (or regexp imenu-example--function-name-regexp-c)
+ nil t)
+ (imenu-progress-message prev-pos)
+ (backward-up-list 1)
+ (save-excursion
+ (goto-char (scan-sexps (point) 1))
+ (setq char (following-char)))
+ ;; Skip this function name if it is a prototype declaration.
+ (if (not (eq char ?\;))
+ (push (imenu-example--name-and-position) index-alist))))
+ (imenu-progress-message prev-pos 100)
+ (nreverse index-alist)))
+
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Internal variables
(defvar imenu--index-alist nil)
(make-variable-buffer-local 'imenu--index-alist)
+;; The latest buffer index used to update the menu bar menu.
+(defvar imenu--last-menubar-index-alist nil)
+(make-variable-buffer-local 'imenu--last-menubar-index-alist)
+
;; History list for 'jump-to-function-in-buffer'.
-;; Buffer local.
+;; Making this buffer local caused it not to work!
(defvar imenu--history-list nil)
-(make-variable-buffer-local 'imenu--history-list)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
(/ (1- pos) (max (/ total 100) 1))
(/ (* 100 (1- pos)) (max total 1)))))
-;;;
-;;; Macro to display a progress message. This will probably be used
-;;; in a tight loop, that is why we use a macro.
-;;; RELPOS is the relative position to display.
-;;; If RELPOS is nil, then the relative position in the buffer
-;;; is calculated.
-(defmacro imenu-progress-message (&optional relpos reverse)
- (` (and
- imenu-scanning-message
- (message imenu-scanning-message
- (, (if relpos
- relpos
- (` (imenu--relative-position (, reverse)))))))))
-
-;;;
-;;; Function for suporting general looking submenu names.
-;;; Uses `imenu-submenu-name-format' for creating the name.
-;;; NAME is the base of the new submenu name.
-;;;
-(defun imenu-create-submenu-name (name)
- (format imenu-submenu-name-format name))
-
;; 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))
(defun imenu--split (list n)
(push (nreverse sublist) result))
(nreverse result)))
-;;;
-;;; Split a menu in to several menus.
-;;;
+;;; Split the alist MENULIST into a nested alist, if it is long enough.
+;;; In any case, add TITLE to the front of the alist.
(defun imenu--split-menu (menulist title)
- (cons "Function menus"
- (mapcar
- (function
- (lambda (menu)
- (cons (format "(%s)" title) menu)))
- (imenu--split menulist imenu-max-items))))
-
-;;;
-;;; Find all items in this buffer that should be in the index.
-;;; Returns an alist on the form
-;;; ((NAME . POSITION) (NAME . POSITION) ...)
-;;;
-
-(defun imenu--make-index-alist ()
- ;; Create a list for this buffer only when needed.
- (or imenu--index-alist
+ (let (keep-at-top tail)
+ (if (memq imenu--rescan-item menulist)
+ (setq keep-at-top (cons imenu--rescan-item nil)
+ menulist (delq imenu--rescan-item menulist)))
+ (setq tail menulist)
+ (while tail
+ (if (imenu--subalist-p (car tail))
+ (setq keep-at-top (cons (car tail) keep-at-top)
+ menulist (delq (car tail) menulist)))
+ (setq tail (cdr tail)))
+ (if imenu-sort-function
+ (setq menulist
+ (sort
+ (let ((res nil)
+ (oldlist menulist))
+ ;; Copy list method from the cl package `copy-list'
+ (while (consp oldlist) (push (pop oldlist) res))
+ (prog1 (nreverse res) (setcdr res oldlist)))
+ imenu-sort-function)))
+ (if (> (length menulist) imenu-max-items)
+ (let ((count 0))
+ (setq menulist
+ (mapcar
+ (function
+ (lambda (menu)
+ (cons (format "From: %s" (caar menu)) menu)))
+ (imenu--split menulist imenu-max-items)))))
+ (cons title
+ (nconc (nreverse keep-at-top) menulist))))
+
+;;; Split up each long alist that are nested within ALIST
+;;; into nested alists.
+(defun imenu--split-submenus (alist)
+ (mapcar (function (lambda (elt)
+ (if (and (consp elt)
+ (stringp (car elt))
+ (listp (cdr elt)))
+ (imenu--split-menu (cdr elt) (car elt))
+ elt)))
+ alist))
+
+(defun imenu--make-index-alist (&optional noerror)
+ "Create an index-alist for the definitions in the current buffer.
+
+Simple elements in the alist look like (INDEX-NAME . INDEX-POSITION).
+Special elements look like (INDEX-NAME FUNCTION ARGUMENTS...).
+A nested sub-alist element looks like (INDEX-NAME SUB-ALIST).
+The function `imenu--subalist-p' tests an element and returns t
+ if it is a sub-alist.
+
+There is one simple element with negative POSITION; that's intended
+as a way for the user to ask to recalculate the buffer's index alist."
+ (or (and imenu--index-alist
+ (or (not imenu-auto-rescan)
+ (and imenu-auto-rescan
+ (> (buffer-size) imenu-auto-rescan-maxout))))
;; Get the index
(setq imenu--index-alist
(save-excursion
(funcall imenu-create-index-function))))
+ (or imenu--index-alist noerror
+ (error "No items suitable for an index found in this buffer"))
(or imenu--index-alist
- (error "No items suitable for an index found in this buffer."))
+ (setq imenu--index-alist (list nil)))
;; Add a rescan option to the index.
(cons imenu--rescan-item imenu--index-alist))
+;;; Find all markers in alist and makes
+;;; them point nowhere.
+;;; The top-level call uses nil as the argument;
+;;; non-nil arguments are in recursivecalls.
+(defvar imenu--cleanup-seen)
+
+(defun imenu--cleanup (&optional alist)
+ ;; If alist is provided use that list.
+ ;; If not, empty the table of lists already seen
+ ;; and use imenu--index-alist.
+ (if alist
+ (setq imenu--cleanup-seen (cons alist imenu--cleanup-seen))
+ (setq alist imenu--index-alist imenu--cleanup-seen (list alist)))
+
+ (and alist
+ (mapcar
+ (function
+ (lambda (item)
+ (cond
+ ((markerp (cdr item))
+ (set-marker (cdr item) nil))
+ ;; Don't process one alist twice.
+ ((memq (cdr item) imenu--cleanup-seen))
+ ((imenu--subalist-p item)
+ (imenu--cleanup (cdr item))))))
+ alist)
+ t))
+
+(defun imenu--create-keymap-2 (alist counter &optional commands)
+ (let ((map nil))
+ (mapcar
+ (function
+ (lambda (item)
+ (cond
+ ((imenu--subalist-p item)
+ (append (list (setq counter (1+ counter))
+ (car item) 'keymap (car item))
+ (imenu--create-keymap-2 (cdr item) (+ counter 10) commands)))
+ (t
+ (let ((end (if commands `(lambda () (interactive)
+ (imenu--menubar-select ',item))
+ (cons '(nil) item))))
+ (cons (car item)
+ (cons (car item) end))))
+ )))
+ alist)))
+
+;; If COMMANDS is non-nil, make a real keymap
+;; with a real command used as the definition.
+;; If it is nil, make something suitable for x-popup-menu.
+(defun imenu--create-keymap-1 (title alist &optional commands)
+ (append (list 'keymap title) (imenu--create-keymap-2 alist 0 commands)))
+
+
+(defun imenu--in-alist (str alist)
+ "Check whether the string STR is contained in multi-level ALIST."
+ (let (elt head tail res)
+ (setq res nil)
+ (while alist
+ (setq elt (car alist)
+ tail (cdr elt)
+ alist (cdr alist)
+ head (car elt))
+ ;; A nested ALIST element looks like
+ ;; (INDEX-NAME (INDEX-NAME . INDEX-POSITION) ...)
+ ;; while a bottom-level element looks like
+ ;; (INDEX-NAME . INDEX-POSITION)
+ ;; We are only interested in the bottom-level elements, so we need to
+ ;; recurse if TAIL is a list.
+ (cond ((listp tail)
+ (if (setq res (imenu--in-alist str tail))
+ (setq alist nil)))
+ ((string= str head)
+ (setq alist nil res elt))))
+ res))
+
(defun imenu-default-create-index-function ()
"*Wrapper for index searching functions.
Their results are gathered into an index alist."
;; These should really be done by setting imenu-create-index-function
;; in these major modes. But save that change for later.
- (cond ((eq major-mode 'emacs-lisp-mode)
- (imenu-example--create-lisp-index))
- ((eq major-mode 'lisp-mode)
- (imenu-example--create-lisp-index))
- ((eq major-mode 'c++-mode)
- (imenu-example--create-c++-index))
- ((eq major-mode 'c-mode)
- (imenu-example--create-c-index))
- (t
- (or (and (fboundp imenu-prev-index-position-function)
- (fboundp imenu-extract-index-name-function))
- (error "The mode \"%s\" does not take full advantage of imenu.el yet."
- mode-name))
+ (cond ((and (fboundp imenu-prev-index-position-function)
+ (fboundp imenu-extract-index-name-function))
(let ((index-alist '())
- name)
+ prev-pos name)
(goto-char (point-max))
- (imenu-progress-message 0 t)
+ (imenu-progress-message prev-pos 0 t)
;; Search for the function
(while (funcall imenu-prev-index-position-function)
- (imenu-progress-message nil t)
+ (imenu-progress-message prev-pos nil t)
(save-excursion
(setq name (funcall imenu-extract-index-name-function)))
(and (stringp name)
(push (cons name (point)) index-alist)))
- (imenu-progress-message 100 t)
- index-alist))))
+ (imenu-progress-message prev-pos 100 t)
+ index-alist))
+ ;; Use generic expression if possible.
+ ((and imenu-generic-expression)
+ (imenu--generic-function imenu-generic-expression))
+ (t
+ (error "The mode \"%s\" does not take full advantage of imenu.el yet."
+ mode-name))))
(defun imenu--replace-spaces (name replacement)
;; Replace all spaces in NAME with REPLACEMENT.
(concat prefix imenu-level-separator name)
name))))
(cond
- ((numberp pos)
+ ((or (markerp pos) (numberp pos))
(list (cons new-prefix pos)))
(t
(imenu--flatten-index-alist pos new-prefix))))))
index-alist))
+;;;
+;;; Generic index gathering function.
+;;;
+
+(defun imenu--generic-function (patterns)
+;; Built on some ideas that Erik Naggum <erik@naggum.no> once posted
+;; to comp.emacs
+ "Return an index of the current buffer as an alist.
+
+PATTERN is an alist with elements that look like this: (MENU-TITLE
+REGEXP INDEX).
+
+MENU-TITLE is a string used as the title for the submenu or nil if the
+entries are not nested.
+
+REGEXP is a regexp that should match a construct in the buffer that is
+to be displayed in the menu; i.e., function or variable definitions,
+etc. It contains a substring which is the name to appear in the
+menu. See the info section on Regexps for more information.
+
+INDEX points to the substring in REGEXP that contains the name (of the
+function, variable or type) that is to appear in the menu.
+
+For emacs-lisp-mode for example PATTERN would look like:
+
+'((nil \"^\\\\s-*(def\\\\(un\\\\|subst\\\\|macro\\\\|advice\\\\)\\\\s-+\\\\([-A-Za-z0-9]+\\\\)\" 2)
+ (\"*Vars*\" \"^\\\\s-*(def\\\\(var\\\\|const\\\\)\\\\s-+\\\\([-A-Za-z0-9]+\\\\)\" 2)
+ (\"*Types*\" \"^\\\\s-*(def\\\\(type\\\\|struct\\\\|class\\\\|ine-condition\\\\)\\\\s-+\\\\([-A-Za-z0-9]+\\\\)\" 2))'
+
+Returns an index of the current buffer as an alist. The elements in
+the alist look like: (INDEX-NAME . INDEX-POSITION). They may also be
+nested index lists like (INDEX-NAME . INDEX-ALIST) depending on
+pattern.
+
+\(imenu--generic-function PATTERN\)."
+
+ (let ((index-alist (list 'dummy))
+ (found nil)
+ (global-regexp
+ (concat "\\("
+ (mapconcat
+ (function (lambda (pattern) (identity (cadr pattern))))
+ patterns "\\)\\|\\(")
+ "\\)"))
+ prev-pos)
+
+ (goto-char (point-max))
+ (imenu-progress-message prev-pos 0 t)
+ (save-match-data
+ (while (re-search-backward global-regexp nil t)
+ (imenu-progress-message prev-pos nil t)
+ (setq found nil)
+ (save-excursion
+ (goto-char (match-beginning 0))
+ (mapcar
+ (function
+ (lambda (pat)
+ (let ((menu-title (car pat))
+ (regexp (cadr pat))
+ (index (caddr pat))
+ (function (cadddr pat))
+ (rest (cddddr pat)))
+ (if (and (not found) ; Only allow one entry;
+ (looking-at regexp))
+ (let ((beg (make-marker))
+ (end (match-end index)))
+ (set-marker beg (match-beginning index))
+ (setq found t)
+ (push
+ (let ((name
+ (buffer-substring-no-properties beg end)))
+ (if function
+ (nconc (list name function name beg)
+ rest)
+ (cons name beg)))
+ (cdr
+ (or (assoc menu-title index-alist)
+ (car (push
+ (cons menu-title '())
+ index-alist))))))))))
+ patterns))))
+ (imenu-progress-message prev-pos 100 t)
+ (let ((main-element (assq nil index-alist)))
+ (nconc (delq main-element (delq 'dummy index-alist))
+ (cdr main-element)))))
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; The main functions for this package!
Returns t for rescan and otherwise a position number."
;; Create a list for this buffer only when needed.
(let (name choice
- (prepared-index-alist
- (mapcar
- (function
- (lambda (item)
- (cons (imenu--replace-spaces (car item) imenu-space-replacement)
- (cdr item))))
- index-alist)))
- (save-window-excursion
- ;; Display the completion buffer
- (with-output-to-temp-buffer "*Completions*"
- (display-completion-list
- (all-completions "" prepared-index-alist )))
- (let ((minibuffer-setup-hook
- (function (lambda ()
- (let ((buffer (current-buffer)))
- (save-excursion
- (set-buffer "*Completions*")
- (setq completion-reference-buffer buffer)))))))
- ;; Make a completion question
- (setq name (completing-read (or prompt "Index item: ")
- prepared-index-alist
- nil t nil 'imenu--history-list))))
+ (prepared-index-alist
+ (mapcar
+ (function
+ (lambda (item)
+ (cons (imenu--replace-spaces (car item) imenu-space-replacement)
+ (cdr item))))
+ index-alist)))
+ (if (eq imenu-always-use-completion-buffer-p 'never)
+ (setq name (completing-read (or prompt "Index item: ")
+ prepared-index-alist
+ nil t nil 'imenu--history-list))
+ (save-window-excursion
+ ;; Display the completion buffer
+ (with-output-to-temp-buffer "*Completions*"
+ (display-completion-list
+ (all-completions "" prepared-index-alist )))
+ (let ((minibuffer-setup-hook
+ (function (lambda ()
+ (let ((buffer (current-buffer)))
+ (save-excursion
+ (set-buffer "*Completions*")
+ (setq completion-reference-buffer buffer)))))))
+ ;; Make a completion question
+ (setq name (completing-read (or prompt "Index item: ")
+ prepared-index-alist
+ nil t nil 'imenu--history-list)))))
(cond ((not (stringp name))
nil)
((string= name (car imenu--rescan-item))
t)
(t
(setq choice (assoc name prepared-index-alist))
- (if (listp (cdr choice))
+ (if (imenu--subalist-p choice)
(imenu--completion-buffer (cdr choice) prompt)
choice)))))
INDEX-ALIST is the buffer index and EVENT is a mouse event.
-Returns t for rescan and otherwise a position number."
- (let* ((menu (imenu--split-menu
- (if imenu-sort-function
- (sort
- (let ((res nil)
- (oldlist index-alist))
- ;; Copy list method from the cl package `copy-list'
- (while (consp oldlist) (push (pop oldlist) res))
- (prog1 (nreverse res) (setcdr res oldlist)))
- imenu-sort-function)
- index-alist)
+Returns t for rescan and otherwise an element or subelement of INDEX-ALIST."
+ (setq index-alist (imenu--split-submenus index-alist))
+ (let* ((menu (imenu--split-menu index-alist
(or title (buffer-name))))
position)
+ (setq menu (imenu--create-keymap-1 (car menu)
+ (if (< 1 (length (cdr menu)))
+ (cdr menu)
+ (cdr (car (cdr menu))))))
(setq position (x-popup-menu event menu))
- (cond
- ((eq position nil)
- position)
- ((listp position)
- (imenu--mouse-menu position event
- (if title
- (concat title imenu-level-separator
- (car (rassq position index-alist)))
- (car (rassq position index-alist)))))
- ((= position (cdr imenu--rescan-item))
- t)
- (t
- (rassq position index-alist)))))
+ (cond ((eq position nil)
+ position)
+ ;; If one call to x-popup-menu handled the nested menus,
+ ;; find the result by looking down the menus here.
+ ((and (listp position)
+ (numberp (car position))
+ (stringp (nth (1- (length position)) position)))
+ (let ((final menu))
+ (while position
+ (setq final (assoc (car position) final))
+ (setq position (cdr position)))
+ (or (string= (car final) (car imenu--rescan-item))
+ (cdr (cdr (cdr final))))))
+ ;; If x-popup-menu went just one level and found a leaf item,
+ ;; return the INDEX-ALIST element for that.
+ ((and (consp position)
+ (stringp (car position))
+ (null (cdr position)))
+ (or (string= (car position) (car imenu--rescan-item))
+ (assq (car position) index-alist)))
+ ;; If x-popup-menu went just one level
+ ;; and found a non-leaf item (a submenu),
+ ;; recurse to handle the rest.
+ ((listp position)
+ (imenu--mouse-menu position event
+ (if title
+ (concat title imenu-level-separator
+ (car (rassq position index-alist)))
+ (car (rassq position index-alist))))))))
(defun imenu-choose-buffer-index (&optional prompt alist)
"Let the user select from a buffer index and return the chosen index.
completion buffer is always used, no matter if the mouse was used or
not.
-The returned value is on the form (INDEX-NAME . INDEX-POSITION)."
+The returned value is of the form (INDEX-NAME . INDEX-POSITION)."
(let (index-alist
- (mouse-triggered (listp last-command-event))
+ (mouse-triggered (listp last-nonmenu-event))
(result t) )
;; If selected by mouse, see to that the window where the mouse is
;; really is selected.
(and mouse-triggered
- (let ((window (posn-window (event-start last-command-event))))
- (or (framep window) (select-window window))))
+ (not (equal last-nonmenu-event '(menu-bar)))
+ (let ((window (posn-window (event-start last-nonmenu-event))))
+ (or (framep window) (null window) (select-window window))))
;; Create a list for this buffer only when needed.
(while (eq result t)
(setq index-alist (if alist alist (imenu--make-index-alist)))
(setq result
(if (and mouse-triggered
(not imenu-always-use-completion-buffer-p))
- (imenu--mouse-menu index-alist last-command-event)
+ (imenu--mouse-menu index-alist last-nonmenu-event)
(imenu--completion-buffer index-alist prompt)))
(and (eq result t)
+ (imenu--cleanup)
(setq imenu--index-alist nil)))
result))
;;;###autoload
-(defun imenu ()
+(defun imenu-add-to-menubar (name)
+ "Adds an `imenu' entry to the menu bar for the current buffer.
+NAME is a string used to name the menu bar item.
+See the command `imenu' for more information."
+ (interactive "sImenu menu item name: ")
+ (let ((newmap (make-sparse-keymap))
+ (menu-bar (lookup-key (current-local-map) [menu-bar])))
+ (define-key newmap [menu-bar]
+ (append (make-sparse-keymap) menu-bar))
+ (define-key newmap [menu-bar index]
+ (cons name (nconc (make-sparse-keymap "Imenu")
+ (make-sparse-keymap))))
+ (use-local-map (append newmap (current-local-map))))
+ (add-hook 'menu-bar-update-hook 'imenu-update-menubar))
+
+(defvar imenu-buffer-menubar nil)
+
+(defun imenu-update-menubar ()
+ (and (current-local-map)
+ (keymapp (lookup-key (current-local-map) [menu-bar index]))
+ (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.
+ (or (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-1 (car menu)
+ (if (< 1 (length (cdr menu)))
+ (cdr menu)
+ (cdr (car (cdr menu))))
+ t))
+ (setq old (lookup-key (current-local-map) [menu-bar index]))
+ (setcdr old (cdr menu1)))))))
+
+(defun imenu--menubar-select (item)
+ "Use Imenu to select the function or variable named in this menu item."
+ (if (equal item '("*Rescan*" . -99))
+ (progn
+ (imenu--cleanup)
+ (setq imenu--index-alist nil)
+ (imenu-update-menubar))
+ (imenu item)))
+
+;;;###autoload
+(defun imenu (index-item)
"Jump to a place in the buffer chosen using a buffer menu or mouse menu.
See `imenu-choose-buffer-index' for more information."
- (interactive)
- (let ((index-item (imenu-choose-buffer-index)))
- (and index-item
- (progn
- (push-mark)
- (goto-char (cdr index-item))))))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;;;
-;;;; Some examples of functions utilizing the framework of this
-;;;; package.
-;;;;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-;; Return the current/previous sexp and the location of the sexp (its
-;; beginning) without moving the point.
-(defun imenu-example--name-and-position ()
- (save-excursion
- (forward-sexp -1)
- (let ((beg (point))
- (end (progn (forward-sexp) (point))))
- (cons (buffer-substring beg end)
- beg))))
-
-;;;
-;;; Lisp
-;;;
-
-(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.
- (save-match-data
- (and (looking-at "(def")
- (condition-case nil
- (progn
- (down-list 1)
- (forward-sexp 2)
- (let ((beg (point))
- (end (progn (forward-sexp -1) (point))))
- (buffer-substring beg end)))
- (error nil)))))
-
-(defun imenu-example--create-lisp-index ()
- ;; Example of a candidate for `imenu-create-index-function'.
- ;; It will generate a nested index of definitions.
- (let ((index-alist '())
- (index-var-alist '())
- (index-type-alist '())
- (index-unknown-alist '()))
- (goto-char (point-max))
- (imenu-progress-message 0)
- ;; Search for the function
- (while (beginning-of-defun)
- (imenu-progress-message nil t)
- (save-match-data
- (and (looking-at "(def")
- (save-excursion
- (down-list 1)
- (cond
- ((looking-at "def\\(var\\|const\\)")
- (forward-sexp 2)
- (push (imenu-example--name-and-position)
- index-var-alist))
- ((looking-at "def\\(un\\|subst\\|macro\\|advice\\)")
- (forward-sexp 2)
- (push (imenu-example--name-and-position)
- index-alist))
- ((looking-at "def\\(type\\|struct\\|class\\|ine-condition\\)")
- (forward-sexp 2)
- (if (= (char-after (1- (point))) ?\))
- (progn
- (forward-sexp -1)
- (down-list 1)
- (forward-sexp 1)))
- (push (imenu-example--name-and-position)
- index-type-alist))
- (t
- (forward-sexp 2)
- (push (imenu-example--name-and-position)
- index-unknown-alist)))))))
- (imenu-progress-message 100)
- (and index-var-alist
- (push (cons (imenu-create-submenu-name "Variables") index-var-alist)
- index-alist))
- (and index-type-alist
- (push (cons (imenu-create-submenu-name "Types") index-type-alist)
- index-alist))
- (and index-unknown-alist
- (push (cons (imenu-create-submenu-name "Syntax-unknown") index-unknown-alist)
- index-alist))
- index-alist))
-
-
-;;;
-;;; C
-;;;
-;; Regular expression to find C functions
-(defvar imenu-example--function-name-regexp-c
- (concat
- "^[a-zA-Z0-9]+[ \t]?" ; type specs; there can be no
- "\\([a-zA-Z0-9_*]+[ \t]+\\)?" ; more than 3 tokens, right?
- "\\([a-zA-Z0-9_*]+[ \t]+\\)?"
- "\\([*&]+[ \t]*\\)?" ; pointer
- "\\([a-zA-Z0-9_*]+\\)[ \t]*(" ; name
- ))
-
-(defun imenu-example--create-c-index (&optional regexp)
- (let ((index-alist '())
- (char))
- (goto-char (point-min))
- (imenu-progress-message 0)
- ;; Search for the function
- (save-match-data
- (while (re-search-forward
- (or regexp imenu-example--function-name-regexp-c)
- nil t)
- (imenu-progress-message)
- (backward-up-list 1)
- (save-excursion
- (goto-char (scan-sexps (point) 1))
- (setq char (following-char)))
- ;; Skip this function name if it is a prototype declaration.
- (if (not (eq char ?\;))
- (push (imenu-example--name-and-position) index-alist))))
- (imenu-progress-message 100)
- (nreverse index-alist)))
-
-;;;
-;;; C++
-;;;
-;; Regular expression to find C++ functions
-(defvar imenu-example--function-name-regexp-c++
- (concat
- "^[a-zA-Z0-9:]+[ \t]?" ; type specs; there can be no
- "\\([a-zA-Z0-9_:~*]+[ \t]+\\)?" ; more than 3 tokens, right?
- "\\([a-zA-Z0-9_:~*]+[ \t]+\\)?"
- "\\([*&]+[ \t]*\\)?" ; pointer
- "\\([a-zA-Z0-9_:*]+\\)[ \t]*(" ; name
- ))
-(defun imenu-example--create-c++-index ()
- (imenu-example--create-c-index imenu-example--function-name-regexp-c++))
+ (interactive
+ (list (save-restriction
+ (widen)
+ (imenu-choose-buffer-index))))
+ ;; Convert a string to an alist element.
+ (if (stringp index-item)
+ (setq index-item (assoc index-item (imenu--make-index-alist))))
+ (and index-item
+ (progn
+ (push-mark)
+ (cond
+ ((markerp (cdr index-item))
+ (if (or (< (marker-position (cdr index-item)) (point-min))
+ (> (marker-position (cdr index-item)) (point-max)))
+ ;; widen if outside narrowing
+ (widen))
+ (goto-char (marker-position (cdr index-item))))
+ ((imenu--subalist-p index-item)
+ (if (or (< (cdr index-item) (point-min))
+ (> (cdr index-item) (point-max)))
+ ;; widen if outside narrowing
+ (widen))
+ (goto-char (cdr index-item)))
+ (t
+ ;; A special item with a function.
+ (let ((function (cadr index-item))
+ (rest (cddr index-item)))
+ (apply function (car index-item) rest)))))))
(provide 'imenu)
HCoop / bpt / emacs.git / blobdiff