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Daniel Colascione <danc at merrillpress.com>

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(which-func-imenu-joiner-function): New.
(which-function): Handle nested imenu trees.
This commit is contained in:
Glenn Morris 2008-09-30 03:41:35 +00:00
parent c27c178cd2
commit fd1c81ef84
1 changed files with 38 additions and 19 deletions
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57
lisp/progmodes/which-func.el
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@ -152,6 +152,12 @@ Zero means compute the Imenu menu regardless of size."
:type 'sexp)
;;;###autoload (put 'which-func-format 'risky-local-variable t)
(defvar which-func-imenu-joiner-function #'last
"Function to call when using imenu to join together multiple
levels of nomenclature. Called with a single argument, a list of
strings giving the names of the menus we had to traverse to get
to the item. Return a single string, the new name of the item.")
(defvar which-func-cleanup-function nil
"Function to transform a string before displaying it in the mode line.
The function is called with one argument, the string to display.
@ -281,25 +287,38 @@ If no function name is found, return nil."
(boundp 'imenu--index-alist) imenu--index-alist)
(let ((alist imenu--index-alist)
(minoffset (point-max))
offset elem pair mark)
(while alist
(setq elem (car-safe alist)
alist (cdr-safe alist))
;; Elements of alist are either ("name" . marker), or
;; ("submenu" ("name" . marker) ... ).
(unless (listp (cdr elem))
(setq elem (list elem)))
(while elem
(setq pair (car elem)
elem (cdr elem))
(and (consp pair)
(number-or-marker-p (setq mark (cdr pair)))
(if (>= (setq offset (- (point) mark)) 0)
(if (< offset minoffset) ; find the closest item
(setq minoffset offset
name (car pair)))
;; Entries in order, so can skip all those after point.
(setq elem nil)))))))
offset pair mark imstack namestack)
;; Elements of alist are either ("name" . marker), or
;; ("submenu" ("name" . marker) ... ). The list can be
;; arbitrarily nested.
(while (or alist imstack)
(if alist
(progn
(setq pair (car-safe alist)
alist (cdr-safe alist))
(cond ((atom pair)) ; skip anything not a cons
((imenu--subalist-p pair)
(setq imstack (cons alist imstack)
namestack (cons (car pair) namestack)
alist (cdr pair)))
((number-or-marker-p (setq mark (cdr pair)))
(if (>= (setq offset (- (point) mark)) 0)
(if (< offset minoffset) ; find the closest item
(setq minoffset offset
name (funcall
which-func-imenu-joiner-function
(reverse (cons (car pair) namestack)))))
;; Entries in order, so can skip all those after point.
(setq alist nil
imstack nil)))))
(setq alist (car imstack)
namestack (cdr namestack)
imstack (cdr imstack))))))
;; Try using add-log support.
(when (and (null name) (boundp 'add-log-current-defun-function)
add-log-current-defun-function)