;;; prelude-programming.el --- Emacs Prelude: prog-mode configuration
;;
;; Copyright (c) 2011-2012 Bozhidar Batsov
;;
;; Author: Bozhidar Batsov <bozhidar@batsov.com>
;; URL: http://batsov.com/emacs-prelude
;; Version: 1.0.0
;; Keywords: convenience
;; Package-Requires: ((guru-mode "0.1"))

;; This file is not part of GNU Emacs.

;;; Commentary:

;; Some basic prog-mode configuration and programming related utilities.

;;; License:

;; This program 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 3
;; of the License, or (at your option) any later version.
;;
;; This program 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 GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Code:

(defun prelude-ido-goto-symbol (&optional symbol-list)
  "Refresh imenu and jump to a place in the buffer using Ido."
  (interactive)
  (unless (featurep 'imenu)
    (require 'imenu nil t))
  (cond
   ((not symbol-list)
    (let ((ido-mode ido-mode)
          (ido-enable-flex-matching
           (if (boundp 'ido-enable-flex-matching)
               ido-enable-flex-matching t))
          name-and-pos symbol-names position)
      (unless ido-mode
        (ido-mode 1)
        (setq ido-enable-flex-matching t))
      (while (progn
               (imenu--cleanup)
               (setq imenu--index-alist nil)
               (prelude-ido-goto-symbol (imenu--make-index-alist))
               (setq selected-symbol
                     (ido-completing-read "Symbol? " symbol-names))
               (string= (car imenu--rescan-item) selected-symbol)))
      (unless (and (boundp 'mark-active) mark-active)
        (push-mark nil t nil))
      (setq position (cdr (assoc selected-symbol name-and-pos)))
      (cond
       ((overlayp position)
        (goto-char (overlay-start position)))
       (t
        (goto-char position)))))
   ((listp symbol-list)
    (dolist (symbol symbol-list)
      (let (name position)
        (cond
         ((and (listp symbol) (imenu--subalist-p symbol))
          (prelude-ido-goto-symbol symbol))
         ((listp symbol)
          (setq name (car symbol))
          (setq position (cdr symbol)))
         ((stringp symbol)
          (setq name symbol)
          (setq position
                (get-text-property 1 'org-imenu-marker symbol))))
        (unless (or (null position) (null name)
                    (string= (car imenu--rescan-item) name))
          (add-to-list 'symbol-names (substring-no-properties name))
          (add-to-list 'name-and-pos (cons (substring-no-properties name) position))))))))

;; add a shortcut for prelude-ido-goto-symbol
(eval-after-load 'prelude-mode
  '(define-key prelude-mode-map (kbd "C-c i") 'prelude-ido-goto-symbol))

(defun prelude-local-comment-auto-fill ()
  (set (make-local-variable 'comment-auto-fill-only-comments) t))

(defun prelude-add-watchwords ()
  (font-lock-add-keywords
   nil '(("\\<\\(FIX\\|TODO\\|FIXME\\|HACK\\|REFACTOR\\):"
          1 font-lock-warning-face t))))

;; show the name of the current function definition in the modeline
(require 'which-func)
(which-function-mode 1)

;; in Emacs 24 programming major modes generally derive from a common
;; mode named prog-mode; for others, we'll arrange for our mode
;; defaults function to run prelude-prog-mode-hook directly.  To
;; augment and/or counteract these defaults your own function
;; to prelude-prog-mode-hook, using:
;;
;;     (add-hook 'prelude-prog-mode-hook 'my-prog-mode-defaults t)
;;
;; (the final optional t sets the *append* argument)

(defun prelude-prog-mode-defaults ()
  "Default coding hook, useful with any programming language."
  (when (and (executable-find ispell-program-name)
             prelude-flyspell)
    (flyspell-prog-mode))
  (when prelude-guru
    (guru-mode +1))
  (when prelude-whitespace
    ;; keep the whitespace decent all the time (in this buffer)
    (add-hook 'before-save-hook 'whitespace-cleanup nil t)
    (whitespace-mode +1))
  (prelude-local-comment-auto-fill)
  (prelude-add-watchwords))

(setq prelude-prog-mode-hook 'prelude-prog-mode-defaults)

(add-hook 'prog-mode-hook (lambda ()
                            (run-hooks 'prelude-prog-mode-hook)))

(provide 'prelude-programming)
;;; prelude-programming.el ends here