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;;; cider-scratch.el --- *scratch* buffer for Clojure -*- lexical-binding: t -*-
;; Copyright © 2014-2018 Bozhidar Batsov and CIDER contributors
;;
;; Author: Tim King <kingtim@gmail.com>
;; Phil Hagelberg <technomancy@gmail.com>
;; Bozhidar Batsov <bozhidar@batsov.com>
;; Artur Malabarba <bruce.connor.am@gmail.com>
;; Hugo Duncan <hugo@hugoduncan.org>
;; Steve Purcell <steve@sanityinc.com>
;; 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/>.
;; This file is not part of GNU Emacs.
;;; Commentary:
;; Imitate Emacs's *scratch* buffer.
;;; Code:
(require 'cider-eval)
(require 'clojure-mode)
(require 'easymenu)
(defcustom cider-scratch-initial-message
";; This buffer is for Clojure experiments and evaluation.\n
;; Press C-j to evaluate the last expression.\n\n"
"The initial message displayed in new scratch buffers."
:type 'string
:group 'cider
:package-version '(cider . "0.18.0"))
(defvar cider-clojure-interaction-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map clojure-mode-map)
(define-key map (kbd "C-j") #'cider-eval-print-last-sexp)
(define-key map [remap paredit-newline] #'cider-eval-print-last-sexp)
(easy-menu-define cider-clojure-interaction-mode-menu map
"Menu for Clojure Interaction mode"
'("Clojure Interaction"
(["Eval and print last sexp" #'cider-eval-print-last-sexp]
"--"
["Reset" #'cider-scratch-reset])))
map))
(defconst cider-scratch-buffer-name "*cider-scratch*")
;;;###autoload
(defun cider-scratch ()
"Go to the scratch buffer named `cider-scratch-buffer-name'."
(interactive)
(pop-to-buffer (cider-scratch-find-or-create-buffer)))
(defun cider-scratch-find-or-create-buffer ()
"Find or create the scratch buffer."
(or (get-buffer cider-scratch-buffer-name)
(cider-scratch--create-buffer)))
(define-derived-mode cider-clojure-interaction-mode clojure-mode "Clojure Interaction"
"Major mode for typing and evaluating Clojure forms.
Like clojure-mode except that \\[cider-eval-print-last-sexp] evals the Lisp expression
before point, and prints its value into the buffer, advancing point.
\\{cider-clojure-interaction-mode-map}"
(setq-local sesman-system 'CIDER))
(defun cider-scratch--insert-welcome-message ()
"Insert the welcome message for the scratch buffer."
(insert cider-scratch-initial-message))
(defun cider-scratch--create-buffer ()
"Create a new scratch buffer."
(with-current-buffer (get-buffer-create cider-scratch-buffer-name)
(cider-clojure-interaction-mode)
(cider-scratch--insert-welcome-message)
(current-buffer)))
(defun cider-scratch-reset ()
"Reset the current scratch buffer."
(interactive)
(erase-buffer)
(cider-scratch--insert-welcome-message))
(provide 'cider-scratch)
;;; cider-scratch.el ends here
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