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;;; ghci-script-mode.el --- GHCi scripts major mode -*- lexical-binding: t -*-
;; Copyright (c) 2014 Chris Done. All rights reserved.
;; This file 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, or (at your option)
;; any later version.
;; This file 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/>.
;;; Code:
(require 'haskell)
(defvar ghci-script-mode-keywords
;; The comment syntax can't be described simply in syntax-table.
;; We could use font-lock-syntactic-keywords, but is it worth it?
'(("^[ \t]*--.*" . font-lock-comment-face)
("^ *\\([^ \t:]+\\):" (1 font-lock-keyword-face))
("^:[a-z{]+ *\\+" . font-lock-keyword-face)
("^:[a-z{]+ " . font-lock-keyword-face)))
;;;###autoload
(define-derived-mode ghci-script-mode text-mode "GHCi-Script"
"Major mode for working with .ghci files."
(set (make-local-variable 'adaptive-fill-mode) nil)
(set (make-local-variable 'comment-start) "-- ")
(set (make-local-variable 'comment-padding) 0)
(set (make-local-variable 'comment-start-skip) "[-{]-[ \t]*")
(set (make-local-variable 'comment-end) "")
(set (make-local-variable 'comment-end-skip) "[ \t]*\\(-}\\|\\s>\\)")
(set (make-local-variable 'indent-line-function) 'haskell-mode-suggest-indent-choice)
(set (make-local-variable 'font-lock-defaults)
'(ghci-script-mode-keywords t t nil nil))
(set (make-local-variable 'indent-tabs-mode) nil)
(set (make-local-variable 'tab-width) 8)
(when (boundp 'electric-indent-inhibit)
(setq electric-indent-inhibit t))
(set (make-local-variable 'dabbrev-case-fold-search) nil)
(set (make-local-variable 'dabbrev-case-distinction) nil)
(set (make-local-variable 'dabbrev-case-replace) nil)
(set (make-local-variable 'dabbrev-abbrev-char-regexp) "\\sw\\|[.]")
(setq haskell-literate nil))
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.ghci\\'" . ghci-script-mode))
(define-key ghci-script-mode-map (kbd "C-c C-l") 'ghci-script-mode-load)
(defun ghci-script-mode-load ()
"Load the current script file into the GHCi session."
(interactive)
(let ((buffer (haskell-session-interactive-buffer (haskell-session)))
(filename (buffer-file-name)))
(save-buffer)
(with-current-buffer buffer
(set-marker haskell-interactive-mode-prompt-start (point-max))
(haskell-interactive-mode-run-expr
(concat ":script " filename)))))
(provide 'ghci-script-mode)