A JavaScript development environment for Emacs https://indium.readthedocs.io
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;;; jade-scratch.el --- Scratch buffer for JS evaluation -*- lexical-binding: t; -*-
;; Copyright (C) 2016 Nicolas Petton
;; Author: Nicolas Petton <nicolas@petton.fr>
;; Keywords: javascript, tools
;; 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
;; 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:
;; Open a scratch buffer with `jade-scratch'.
;;; Code:
(require 'jade-interaction)
(require 'jade-repl)
(defun jade-scratch ()
"Pop to the scratch buffer.
If no scratch buffer exists for the current connection, create
one first."
(pop-to-buffer (jade-scratch-get-buffer-create)))
(defun jade-scratch-get-buffer-create ()
"Return a scratch buffer for the current connection.
If no buffer exists, create one.
If there is no current connection, throw an error."
(unless jade-connection
(user-error "No current connection"))
(let* ((url (map-elt jade-connection 'url))
(bufname (jade-scratch-buffer-name url))
(buf (get-buffer bufname)))
(unless buf
(setq buf (get-buffer-create bufname))
(jade-scratch-setup-buffer buf jade-connection))
(defun jade-scratch-buffer-name (url)
"Return the scratch buffer name for URL."
(format "*JS scratch %s*" url))
(defun jade-scratch-setup-buffer (buffer connection)
"Setup the scratch BUFFER for CONNECTION."
(with-current-buffer buffer
;; TODO: enable completion like in the REPL
(setq-local jade-connection connection)
(defun jade-scratch-insert-welcome-message ()
"Insert a welcome message to help use the scratch buffer."
(insert "// This buffer is for JavaScript evaluation.
// Press C-x C-e to evaluate the last expression.
// Press C-c M-i to inspect the last expression.\n\n"))
(provide 'jade-scratch)
;;; jade-scratch.el ends here