;;; predictive-prog-mode.el ---

;; Copyright (C) 2006 Dmitry Galinsky <dima dot exe at gmail dot com>

;; Authors: Dmitry Galinsky <dima dot exe at gmail dot com>,

;; Keywords: ruby rails languages oop

;; $URL: svn+ssh://rubyforge/var/svn/emacs-rails/trunk/rails.el $

;; $Id: rails.el 149 2007-03-29 15:07:49Z dimaexe $

;;; 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 2

;; 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 this program; if not, write to the Free Software

;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

;;; Code:

(eval-when-compile

  (require 'predictive nil t)

  (require 'completion-ui nil t))

(require 'flyspell)

(defconst predictive-prog-text-faces

  '(font-lock-comment-face font-lock-doc-face)

  "Faces corresponding to text in programming-mode buffers.")

(defvar predictive-prog-mode-main-dict nil)

(defun activate-predictive-inside-comments (start end len)

  "Looking at symbol at point and activate the `predictive-mode'

if there a string or a comment."

  (save-excursion

    (let ((p (get-text-property (- (point) 1) 'face))

          (f (get-text-property (point) 'face)))

      (if (or (memq f predictive-prog-text-faces)

              (memq p predictive-prog-text-faces))

          (setq predictive-main-dict predictive-prog-mode-main-dict)

        (setq predictive-main-dict nil)))))

(defun predictive-prog-mode ()

  "Enable the `predictive-mode' inside strings and comments

only, like `flyspell-prog-mode'."

  (interactive)

  (when (fboundp 'predictive-mode)

    (set (make-local-variable 'predictive-main-dict) nil)

    (set (make-local-variable 'predictive-prog-mode-main-dict) predictive-main-dict)

    (if (find 'activate-predictive-inside-comments after-change-functions)

        (progn

          (remove-hook 'after-change-functions 'activate-predictive-inside-comments t)

          (predictive-mode -1))

      (progn

;        (set (make-local-variable 'predictive-use-auto-learn-cache) nil)

        (set (make-local-variable 'predictive-dict-autosave-on-kill-buffer) nil)

        (predictive-mode 1)

        (add-hook 'after-change-functions 'activate-predictive-inside-comments nil t)))))

(provide 'predictive-prog-mode)