source: projects/emacsen-common/branches/0.4.x/apel-sample/usr/share/emacs/site-lisp/apel/tinyrich.el @ 7238

;;;
;;; $Id: tinyrich.el,v 1.1.1.1 2001/07/19 05:31:22 xtakei Exp $
;;;
;;;          by MORIOKA Tomohiko  <morioka@jaist.ac.jp>
;;; modified by YAMATE Keiichirou <ics9118@sem1.info.osaka-cu.ac.jp>
;;;

(defvar mime-viewer/face-list-for-text/enriched
  (cond ((and (>= emacs-major-version 19) window-system)
         '(bold italic fixed underline)
         )
        ((and (boundp 'NEMACS) NEMACS)
         '("bold" "italic" "underline")
         )))

(defun enriched-decode (beg end)
  (interactive "*r")
  (save-excursion
    (save-restriction
      (narrow-to-region beg end)
      (goto-char beg)
      (while (re-search-forward "[ \t]*\\(\n+\\)[ \t]*" nil t)
        (let ((str (buffer-substring (match-beginning 1)
                                     (match-end 1))))
          (if (string= str "\n")
              (replace-match " ")
            (replace-match (substring str 1))
            )))
      (goto-char beg)
      (let (cmd sym str (fb (point)) fe b e)
        (while (re-search-forward "<\\(<\\|[^<>\n\r \t]+>\\)" nil t)
          (setq b (match-beginning 0))
          (setq cmd (buffer-substring b (match-end 0)))
          (if (string= cmd "<<")
              (replace-match "<")
            (replace-match "")
            (setq cmd (downcase (substring cmd 1 (- (length cmd) 1))))
            )
          (setq sym (intern cmd))
          (cond ((eq sym 'param)
                 (setq b (point))
                 (save-excursion
                   (save-restriction
                     (if (search-forward "</param>" nil t)
                         (progn
                           (replace-match "")
                           (setq e (point))
                           )
                       (setq e end)
                       )))
                 (delete-region b e)
                 )
                ((memq sym mime-viewer/face-list-for-text/enriched)
                 (setq b (point))
                 (save-excursion
                   (save-restriction
                     (if (re-search-forward (concat "</" cmd ">") nil t)
                         (progn
                           (replace-match "")
                           (setq e (point))
                           )
                       (setq e end)
                       )))
                 (tm:set-face-region b e sym)
                 )))
        (goto-char (point-max))
        (if (not (eq (preceding-char) ?\n))
            (insert "\n")
          )
        ))))


;;; @ text/richtext <-> text/enriched converter
;;;

(defun richtext-to-enriched-region (beg end)
  "Convert the region of text/richtext style to text/enriched style."
  (save-excursion
    (save-restriction
      (narrow-to-region beg end)
      (goto-char (point-min))
      (let (b e i)
        (while (re-search-forward "[ \t]*<comment>" nil t)
          (setq b (match-beginning 0))
          (delete-region b
                         (if (re-search-forward "</comment>[ \t]*" nil t)
                             (match-end 0)
                           (point-max)
                           ))
          )
        (goto-char (point-min))
        (while (re-search-forward "\n\n+" nil t)
          (replace-match "\n")
          )
        (goto-char (point-min))
        (while (re-search-forward "[ \t\n]*<nl>[ \t\n]*" nil t)
          (setq b (match-beginning 0))
          (setq e (match-end 0))
          (setq i 1)
          (while (looking-at "[ \t\n]*<nl>[ \t\n]*")
            (setq e (match-end 0))
            (setq i (1+ i))
            (goto-char e)
            )
          (delete-region b e)
          (while (>= i 0)
            (insert "\n")
            (setq i (1- i))
            ))
        (goto-char (point-min))
        (while (search-forward "<lt>" nil t)
          (replace-match "<<")
          )
        ))))

(defun enriched-to-richtext-region (beg end)
  "Convert the region of text/enriched style to text/richtext style."
  (save-excursion
    (save-restriction
      (goto-char beg)
      (and (search-forward "text/enriched")
           (replace-match "text/richtext"))
      (search-forward "\n\n")
      (narrow-to-region (match-end 0) end)
      (let (str n)
        (goto-char (point-min))
        (while (re-search-forward "\n\n+" nil t)
          (setq str (buffer-substring (match-beginning 0)
                                      (match-end 0)))
          (setq n (1- (length str)))
          (setq str "")
          (while (> n 0)
            (setq str (concat str "<nl>\n"))
            (setq n (1- n))
            )
          (replace-match str)
          )
        (goto-char (point-min))
        (while (search-forward "<<" nil t)
          (replace-match "<lt>")
          )
        ))))


;;; @ encoder and decoder
;;;

(defun richtext-decode (beg end)
  (save-restriction
    (narrow-to-region beg end)
    (richtext-to-enriched-region beg (point-max))
    (enriched-decode beg (point-max))
    ))

;; (defun richtext-encode (beg end)
;;   (save-restriction
;;     (narrow-to-region beg end)
;;     (enriched-encode beg (point-max))
;;     (enriched-to-richtext-region beg (point-max))
;;     ))


;;; @ end
;;;

(require 'product)
(product-provide (provide 'tinyrich) (require 'apel-ver))

;; tinyrich.el ends here.