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