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ac-jsxを補完強化版に対応してみた。

emacs jsx autocomplete

JSXの補完を強化します - Islands in the byte stream


まあ auto-completeの勉強です。
jsx-mode.elのブランチに auto-completeの機能が実装されているので、
それを待つほうが無難でしょう。

ソース

;;; ac-jsx.el --- auto-complete for JSX

;; Copyright (C) 2012 by Syohei YOSHIDA

;; Author: Syohei YOSHIDA <syohex@gmail.com>
;; URL:

;; 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:

;;; Code:

(eval-when-compile
  (require 'cl))

(require 'json)

(defgroup ac-jsx nil
  "auto-complete for jsx"
  :group 'jsx
  :prefix "ac-jsx:")

(defvar ac-jsx:command (or (and (boundp 'jsx-cmd) jsx-cmd) "jsx"))

(defun ac-jsx:complete-command (tempfile)
  (let ((file (buffer-file-name)))
    (format "%s --input-filename %s --complete %d:%d '%s'"
            ac-jsx:command file
            (line-number-at-pos) (ac-jsx:current-char-number) tempfile)))

(defun ac-jsx:current-char-number ()
  (length (buffer-substring-no-properties
           (line-beginning-position) (1+ (point)))))

(defun ac-jsx:write-temp-file ()
  (let ((temp (concat (make-temp-name "jsx") ".jsx")))
    (let ((str (buffer-substring-no-properties (point-min) (point-max))))
      (with-temp-file temp
        (insert str))
      (expand-file-name temp))))

(defun ac-jsx:decode-json-buffer ()
  (let ((str (buffer-substring-no-properties (point-min) (point-max))))
    (json-read-from-string str)))

(defun ac-jsx:completion-at-point ()
  (let* ((tempfile (ac-jsx:write-temp-file))
         (cmd (ac-jsx:complete-command tempfile)))
    (with-temp-buffer
      (let (retval)
        (unwind-protect
            (setq retval (call-process-shell-command cmd nil t nil))
          (delete-file tempfile))
        (unless (zerop retval)
          (error (format "Failed: '%s'(ret=%d)" cmd retval))))
      (loop for compinfo across (ac-jsx:decode-json-buffer)
            for word = (assoc-default 'word compinfo)
            for menu = (assoc-default 'menu compinfo)
            collect (propertize word 'menu menu)))))

(defun ac-jsx:document (item)
  (get-text-property 0 'menu item))

(defvar ac-source-jsx
  '((candidates . ac-jsx:completion-at-point)
    (document . ac-jsx:document)
    (prefix . "\\(.*\\)")
    (requires . 0))
  "Source for JSX completion")

(add-hook 'jsx-mode-hook (lambda () (add-to-list 'ac-sources 'ac-source-jsx)))

(provide 'ac-jsx)

;;; ac-jsx.el ends here

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