;;; dict-mode.el --- major mode for dict dictionary source files

;; Copyright (C) 2011 by Oleksandr Gavenko <gavenkoa@gmail.com>

;; You can do anything with this file without any warranty.

;; Author: Oleksandr Gavenko <gavenkoa@gmail.com>

;; Maintainer: Oleksandr Gavenko <gavenkoa@gmail.com>

;; Created: 2011-09-04

;; Version: 0.1

;; Keywords: dict, dictionary

;;; Commentary:

;;

;; Very pure release.

;;; Code:

(defvar dict-c5-font-lock-keywords

  '(

    ("^\\(_\\{5,\\}\\)\n\n\\(\\w.*\\)$"

     (1 font-lock-function-name-face) (2 font-lock-keyword-face))

    ("\\[[^]\n]+]" . font-lock-type-face)

    ))

(eval-when-compile

  (defvar font-lock-beg)

  (defvar font-lock-end))

(defun dict-c5-font-lock-extend-region ()

  "Look for '_____' expression and extend `font-lock-beg' and `font-lock-end'."

  ;; (message "%d:%d, %d lines" font-lock-beg font-lock-end (count-lines font-lock-beg font-lock-end))

  (cond

   ((and

     (< (count-lines font-lock-beg font-lock-end) 5)

     (not (and (<= (point-max) font-lock-end) (<= font-lock-beg (point-min)) )))

    (save-excursion

      (goto-char font-lock-beg)

      (forward-line -2)

      (setq font-lock-beg (point))

      (goto-char font-lock-end)

      (forward-line 3)

      (setq font-lock-end (point))

      )

    t)

   (t nil)

   ))

(defun dict-c5-new-entry ()

  "Insert new entry template."

  (interactive)

  (if (re-search-forward "^_____" nil t)

      (beginning-of-line)

    (goto-char (point-max)))

  (while (eq (char-before) ?\n)

    (delete-backward-char 1))

  (insert-char ?\n)

  (insert-char ?_ 5)

  (insert-char ?\n 3)

  (backward-char))

(defvar dict-c5-mode-map (make-sparse-keymap))

(define-key dict-c5-mode-map [C-return] 'dict-c5-new-entry)

;;;###autoload

(define-derived-mode dict-c5-mode fundamental-mode "Dict-c5"

  "Derived mode for editing C5 dictd source file."

  (add-to-list 'auto-mode-alist (cons "\\.dict-c5$" 'dict-c5-mode))

  (setq font-lock-defaults

        '(dict-c5-font-lock-keywords

          t nil nil nil

          (font-lock-multiline . t)

          ))

  (use-local-map dict-c5-mode-map)

  (modify-syntax-entry ?' ".")

  (modify-syntax-entry ?\" ".")

  (make-local-variable 'paragraph-separate)

  (setq paragraph-separate "\\([ \t\f]*\\|_\\{5,\\}\\)$")

  (make-local-variable 'paragraph-start)

  (setq paragraph-start paragraph-separate)

  (add-hook 'font-lock-extend-region-functions 'dict-c5-font-lock-extend-region t)

  )

;;; dict-mode.el ends here