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Add basic Imenu support for easy navigation. #8

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Add basic Imenu support for easy navigation. #8

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39 changes: 39 additions & 0 deletions rpm-spec-mode.el
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Original file line number Diff line number Diff line change
Expand Up @@ -646,7 +646,45 @@ value returned by function `user-mail-address'."
(define-abbrev-table 'rpm-spec-mode-abbrev-table ())

;;------------------------------------------------------------
;; Imenu support
(defun rpm-spec-mode-imenu-setup ()
"An all-in-one setup function to add `imenu' support to
`rpm-spec-mode'."
(setq imenu-create-index-function
#'rpm-spec-mode-imenu-create-index-function))

(defun rpm-spec-mode-imenu-create-index-function ()
"Creating a buffer index for `rpm-spec-mode' The function
should take no arguments, and return an index alist for the
current buffer. It is called within `save-excursion', so where it
leaves point makes no difference."
(goto-char (point-min))
(let (rpm-imenu-index
(sub-package-name-regexp "[[:space:]]+-n[[:space:]]+\\([-_[:alnum:]]+\\)")
rpm-spec-imenu-index-alist
section
pos-marker
subpkg-name
submenu
new-index)
(while (re-search-forward rpm-section-regexp nil t)
(setq pos-marker (point-marker))
(setq section (match-string-no-properties 1))
;; try to extract sub package name
(if (re-search-forward sub-package-name-regexp
(line-end-position) t)
(setq subpkg-name (match-string-no-properties 1))
(setq subpkg-name "__default"))
;; create/add the matched item to the index list
(setq new-index (cons subpkg-name pos-marker))
(if (setq submenu (assoc section rpm-imenu-index))
(setf (cdr submenu)
(cons new-index (cdr submenu)))
(add-to-list 'rpm-imenu-index
(list section new-index))))
rpm-imenu-index))

;;------------------------------------------------------------
(add-hook 'rpm-spec-mode-new-file-hook 'rpm-spec-initialize)

;;;###autoload
Expand Down Expand Up @@ -707,6 +745,7 @@ with no args, if that value is non-nil."
;;Initialize font lock for GNU emacs.
(make-local-variable 'font-lock-defaults)
(setq font-lock-defaults '(rpm-spec-font-lock-keywords nil t))
(rpm-spec-mode-imenu-setup)
(run-hooks 'rpm-spec-mode-hook))

(defun rpm-command-filter (process string)
Expand Down