;;; json-mode.el --- Major mode for editing JSON files

;; Copyright (C) 2011-2014 Josh Johnston

;; Author: Josh Johnston
;; URL: https://github.com/joshwnj/json-mode
;; Package-Version: 20160803.1606
;; Version: 1.6.0
;; Package-Requires: ((json-reformat "0.0.5") (json-snatcher "1.0.0"))

;; 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 this program.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; extend the builtin js-mode's syntax highlighting

;;; Code:

(require 'js)
(require 'rx)
(require 'json-snatcher)
(require 'json-reformat)

(defconst json-mode-quoted-string-re
  (rx (group (char ?\")
             (zero-or-more (or (seq ?\\ ?\\)
                               (seq ?\\ ?\")
                               (seq ?\\ (not (any ?\" ?\\)))
                               (not (any ?\" ?\\))))
             (char ?\"))))
(defconst json-mode-quoted-key-re
  (rx (group (char ?\")
             (zero-or-more (or (seq ?\\ ?\\)
                               (seq ?\\ ?\")
                               (seq ?\\ (not (any ?\" ?\\)))
                               (not (any ?\" ?\\))))
             (char ?\"))
      (zero-or-more blank)
      ?\:))
(defconst json-mode-number-re (rx (group (one-or-more digit)
                                         (optional ?\. (one-or-more digit)))))
(defconst json-mode-keyword-re  (rx (group (or "true" "false" "null"))))

(defconst json-font-lock-keywords-1
  (list
   (list json-mode-quoted-key-re 1 font-lock-keyword-face)
   (list json-mode-quoted-string-re 1 font-lock-string-face)
   (list json-mode-keyword-re 1 font-lock-constant-face)
   (list json-mode-number-re 1 font-lock-constant-face)
   )
  "Level one font lock.")

;;;###autoload
(define-derived-mode json-mode javascript-mode "JSON"
  "Major mode for editing JSON files"
  (set (make-local-variable 'font-lock-defaults) '(json-font-lock-keywords-1 t)))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.json$" . json-mode))
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.jsonld$" . json-mode))

;;;###autoload
(defun json-mode-show-path ()
  (interactive)
  (let ((temp-name "*json-path*"))
    (with-output-to-temp-buffer temp-name (jsons-print-path))

    (let ((temp-window (get-buffer-window temp-name)))
      ;; delete the window if we have one,
      ;; so we can recreate it in the correct position
      (if temp-window
	  (delete-window temp-window))

      ;; always put the temp window below the json window
      (set-window-buffer (if (fboundp 'split-window-below)
			     (split-window-below)
			   (split-window-vertically)) temp-name))
    ))

(define-key json-mode-map (kbd "C-c C-p") 'json-mode-show-path)

;;;###autoload
(defun json-mode-beautify ()
  "Beautify / pretty-print the active region (or the entire buffer if no active region)."
  (interactive)
  (let ((json-reformat:indent-width js-indent-level)
        (json-reformat:pretty-string? t))
    (if (use-region-p)
        (json-reformat-region (region-beginning) (region-end))
      (json-reformat-region (buffer-end -1) (buffer-end 1)))))

(define-key json-mode-map (kbd "C-c C-f") 'json-mode-beautify)


(provide 'json-mode)
;;; json-mode.el ends here