A JavaScript development environment for Emacs
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72 lines
2.4 KiB
72 lines
2.4 KiB
;;; jade-scratch.el --- Scratch buffer for JS evaluation -*- lexical-binding: t; -*-
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;; Copyright (C) 2016 Nicolas Petton
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;; Author: Nicolas Petton <nicolas@petton.fr>
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;; Keywords: javascript, tools
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Open a scratch buffer with `jade-scratch'.
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;;; Code:
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(require 'jade-interaction)
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(require 'jade-repl)
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(defun jade-scratch ()
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"Pop to the scratch buffer.
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If no scratch buffer exists for the current connection, create
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one first."
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(interactive)
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(pop-to-buffer (jade-scratch-get-buffer-create)))
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(defun jade-scratch-get-buffer-create ()
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"Return a scratch buffer for the current connection.
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If no buffer exists, create one.
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If there is no current connection, throw an error."
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(unless jade-connection
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(user-error "No current connection"))
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(let* ((url (map-elt jade-connection 'url))
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(bufname (jade-scratch-buffer-name url))
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(buf (get-buffer bufname)))
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(unless buf
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(setq buf (get-buffer-create bufname))
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(jade-scratch-setup-buffer buf jade-connection))
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buf))
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(defun jade-scratch-buffer-name (url)
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"Return the scratch buffer name for URL."
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(format "*JS scratch %s*" url))
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(defun jade-scratch-setup-buffer (buffer connection)
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"Setup the scratch BUFFER for CONNECTION."
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(with-current-buffer buffer
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;; TODO: enable completion like in the REPL
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(js2-mode)
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(jade-interaction-mode)
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(setq-local jade-connection connection)
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(jade-scratch-insert-welcome-message)))
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(defun jade-scratch-insert-welcome-message ()
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"Insert a welcome message to help use the scratch buffer."
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(insert "// This buffer is for JavaScript evaluation.
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// Press C-x C-e to evaluate the last expression.
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// Press C-c M-i to inspect the last expression.\n\n"))
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(provide 'jade-scratch)
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;;; jade-scratch.el ends here
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