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Refactor imenu-index flattening

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Ivan Malison 2016-08-17 17:25:35 -07:00
parent 7f5c885fef
commit 46551d0518
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1 changed files with 31 additions and 12 deletions
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dotfiles/emacs.d/README.org
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@ -504,32 +504,51 @@ times to find what I'm looking for. The functions that follow allow me
to get this behavior out of functions that provide a nested imenu
index.
#+BEGIN_SRC emacs-lisp
(defun imalison:imenu-prefix-flattened (index)
(let ((flattened (imalison:flatten-imenu-index (cdr index))))
(cl-loop for sub-item in flattened
collect
`(,(concat (car index) "." (car sub-item)) . ,(cdr sub-item)))))
(defvar imalison:imenu-separator ".")
(cl-defun imalison:flatten-index-entry (index-entry &optional (prefix ""))
(cl-destructuring-bind (entry-name . rest) index-entry
(message "%s" rest)
(let ((new-entry-name (concat prefix entry-name))
(original-properties (text-properties-at 0 entry-name)))
;; Inherit any text-properties that were attached to the
;; original entry.
(set-text-properties 0 (length new-entry-name)
original-properties
new-entry-name)
(if (listp rest)
;; Internal Node
(let* ((new-prefix (concat new-entry-name imalison:imenu-separator))
(flattened-subentries
(cl-mapcan (lambda (entry)
(imalison:flatten-index-entry entry new-prefix))
rest)))
(if original-properties
;; When the entry had properties, we may want to keep
;; it around, because it might have a marker attached.
(cons (list new-entry-name) flattened-subentries)
flattened-subentries))
;; Leaf Node
(list (cons new-entry-name rest))))))
(defun imalison:flatten-imenu-index (index)
(let ((cdr-is-index (listp (cdr index))))
(cond ((not (stringp (car index))) (cl-mapcan
#'imalison:flatten-imenu-index index))
(cdr-is-index (imalison:imenu-prefix-flattened index))
(t (list index)))))
(cl-mapcan 'imalison:flatten-index-entry index))
(defun imalison:make-imenu-index-flat ()
(defun imalison:make-current-imenu-index-flat ()
(let ((original-imenu-function imenu-create-index-function))
(setq imenu-create-index-function
(lambda ()
(imalison:flatten-imenu-index
(funcall original-imenu-function))))))
#+END_SRC
By advising ~imenu--make-index-alist~ with
~imalison:flatten-imenu-index~ we make it so that imenu indexes are
always flattened. This is still experimental, so copy to your own
dotfiles with caution.
#+BEGIN_SRC emacs-lisp
(defvar imalison:flatten-imenu-global t)
(defvar imalison:flatten-imenu-global nil)
(defvar imalison:flatten-imenu-local t)
(make-variable-buffer-local 'imalison:flatten-imenu-local)