;;; ein-ipynb-mode.el --- A simple mode for ipynb file    -*- lexical-binding:t -*-

;; Copyright (C) 2012 Takafumi Arakaki

;; Author: Takafumi Arakaki <aka.tkf at gmail.com>

;; This file is NOT part of GNU Emacs.

;; ein-ipynb-mode.el 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.

;; ein-ipynb-mode.el 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 ein-ipynb-mode.el.
;; If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;;

;;; Code:

(require 'ein-process)
(require 'js)

;;;###autoload
(define-derived-mode ein:ipynb-mode js-mode "ein:ipynb"
  "A simple mode for ipynb file.

\\{ein:ipynb-mode-map}
"
  :group 'ein
  :after-hook
  (let* ((filename (file-name-nondirectory buffer-file-truename))
         (remote-filename (concat (file-name-as-directory "run-remote") filename)))
    ;; fragile hack to refresh s3fuse
    (call-process "cat" nil nil nil remote-filename)
    (when (and (file-readable-p remote-filename)
               (file-newer-than-file-p remote-filename filename)
               (prog1
                   (let ((inhibit-quit t))
                     (prog1
                         (with-local-quit
                           (y-or-n-p "Corresponding run-remote is newer. Replace? (will first backup) "))
                       (setq quit-flag nil)))
                 (message "")))
      (if-let ((make-backup-files t)
               (where-to (funcall make-backup-file-name-function buffer-file-name)))
          (let* (backup-inhibited
                 (orig-hooks find-file-hook)
                 (reassure (lambda ()
                             (message "Backed up to %s" where-to)
                             (setq find-file-hook orig-hooks))))
            (backup-buffer)
            (copy-file remote-filename filename t t)
            (add-hook 'find-file-hook reassure nil)
            (find-file-noselect filename t))
        (message "Backup failed.  Not replaced")))))

(let ((map ein:ipynb-mode-map))
  (set-keymap-parent map js-mode-map)
  (define-key map "\C-c\C-z" 'ein:process-find-file-callback)
  (define-key map "\C-c\C-o" 'ein:process-find-file-callback)
  (define-key map "\C-c\C-r" 'ein:gat-run-remote)
  (easy-menu-define ein:ipynb-menu map "EIN IPyNB Mode Menu"
    `("EIN IPyNB File"
      ,@(ein:generate-menu
         '(("Open notebook" ein:process-find-file-callback))))))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.ipynb\\'" . ein:ipynb-mode))

(provide 'ein-ipynb-mode)

;;; ein-ipynb-mode.el ends here