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ncptl-mode.el.in
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ncptl-mode.el.in
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;;; ncptl-mode.el --- Major mode for editing coNCePTuaL programs
;; Author: Scott Pakin <pakin@lanl.gov>
;; Maintainer: Scott Pakin <pakin@lanl.gov>
;; Created: August 2003
;; Version: 2.0
;; Keywords: languages coNCePTuaL ncptl
;;; Copyright and license:
;;
;; Copyright (C) 2003, Triad National Security, LLC
;; All rights reserved.
;;
;; Copyright (2003). Triad National Security, LLC. This software
;; was produced under U.S. Government contract 89233218CNA000001 for
;; Los Alamos National Laboratory (LANL), which is operated by Los
;; Alamos National Security, LLC (Triad) for the U.S. Department
;; of Energy. The U.S. Government has rights to use, reproduce,
;; and distribute this software. NEITHER THE GOVERNMENT NOR TRIAD
;; MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY
;; FOR THE USE OF THIS SOFTWARE. If software is modified to produce
;; derivative works, such modified software should be clearly marked,
;; so as not to confuse it with the version available from LANL.
;;
;; Additionally, redistribution and use in source and binary forms,
;; with or without modification, are permitted provided that the
;; following conditions are met:
;;
;; * Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;;
;; * Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer
;; in the documentation and/or other materials provided with the
;; distribution.
;;
;; * Neither the name of Triad National Security, LLC, Los Alamos
;; National Laboratory, the U.S. Government, nor the names of its
;; contributors may be used to endorse or promote products derived
;; from this software without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY TRIAD AND CONTRIBUTORS "AS IS" AND ANY
;; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL TRIAD OR CONTRIBUTORS BE
;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
;; OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
;; OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
;; BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
;; OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
;; EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;
;;; Commentary:
;; This is a major mode for editing coNCePTuaL programs. It is an
;; early draft (not to mention my first Emacs major mode) and
;; therefore doesn't do very much yet. It's also not very thoroughly
;; tested; I tried a few trivial things in GNU Emacs and they seemed
;; to work.
;;
;; To automatically load ncptl-mode whenever you load a .ncptl file,
;; add like the following to your .emacs file:
;;
;; (autoload 'ncptl-mode "ncptl-mode"
;; "Major mode for editing coNCePTuaL programs." t)
;; (add-to-list 'auto-mode-alist '("\\.ncptl$" . ncptl-mode))
;;; History:
;; coNCePTuaL mode for GNU Emacs was written by Scott Pakin in August
;; 2003 and revised in February 2006.
;;; Code:
;; Syntax highlighting
(defvar ncptl-mode-syntax-table
(let ((st (make-syntax-table (standard-syntax-table))))
(modify-syntax-entry ?# "<" st)
(modify-syntax-entry ?\n ">" st)
(modify-syntax-entry ?\\ "\\" st)
(modify-syntax-entry ?_ "w" st)
(modify-syntax-entry ?[ "." st)
(modify-syntax-entry ?] "." st)
st)
"Syntax table in use in `ncptl-mode' buffers.")
(defvar ncptl-mode-abbrev-table nil
"Abbrev table in use in `ncptl-mode' buffers.")
(unless ncptl-mode-abbrev-table
(define-abbrev-table 'ncptl-mode-abbrev-table ()))
(defconst ncptl-all-keywords
'(MAKE SHOULD HAVE REPLACED THIS LINE)
"List of all keywords recognized by coNCePTuaL. See also `font-lock-keywords'.")
(defvar ncptl-font-lock-keywords
(list
(cons (concat "\\b\\("
(regexp-opt ncptl-all-keywords)
"\\)\\b") 1))
"Keywords to highlight for coNCePTuaL. See variable `font-lock-keywords'.")
(put 'ncptl-mode 'font-lock-defaults '(ncptl-font-lock-keywords))
;; Code indentation
(defcustom ncptl-indent 2
"*Size of coNCePTuaL indentation."
:type 'integer
:group 'ncptl)
(defun ncptl-indent-line ()
"Indent the current line of coNCePTuaL code."
(interactive "*")
(beginning-of-line)
(if (bobp)
(indent-line-to 0)
(let* ((find-indent-delta) ; Suppress the byte-compiler's "reference to free variable" warning.
(find-indent-delta
#'(lambda (indent-delta)
"Return the sum of `indent-delta' plus the number of open curlies in the current line (starting from the point) minus the number of close curlies"
(or
(if (eolp) indent-delta)
(if (looking-at "#") indent-delta)
(if (looking-at "{")
(progn
(forward-char)
(funcall find-indent-delta (1+ indent-delta))))
(if (looking-at "}")
(progn
(forward-char)
(funcall find-indent-delta (1- indent-delta))))
(if (looking-at "\"")
(progn
(forward-char)
(while (not (or (eolp) (looking-at "\"")))
(if (and (not (eolp)) (looking-at "\\\\"))
(forward-char))
(forward-char))
(if (eolp)
indent-delta
(progn
(forward-char)
(funcall find-indent-delta indent-delta)))))
(progn
(forward-char)
(funcall find-indent-delta indent-delta)))))
(backward-line-to-non-empty
#'(lambda ()
"Move back to the beginning of the previous non-empty line"
(beginning-of-line)
(forward-line -1)
(while (and (looking-at "^[:space:]*$")
(not (bobp)))
(forward-line -1))))
(previous-indentation
(save-excursion
(funcall backward-line-to-non-empty)
(current-indentation)))
(previous-indent-delta
(save-excursion
(funcall backward-line-to-non-empty)
(* ncptl-indent (funcall find-indent-delta 0))))
(current-indent-delta
(* ncptl-indent (funcall find-indent-delta 0)))
(new-indentation
(+ previous-indentation
previous-indent-delta
(if (< previous-indent-delta 0) ncptl-indent 0)
(if (< current-indent-delta 0) current-indent-delta 0))))
(indent-line-to
(if (< new-indentation 0) 0 new-indentation)))))
;; Keyboard mapping
(defvar ncptl-mode-map
(let ((ncptl-mode-map (make-sparse-keymap)))
(define-key ncptl-mode-map "\C-j" 'newline-and-indent)
ncptl-mode-map)
"Keymap for the coNCePTuaL major mode.")
;; Initialization
(defvar ncptl-mode-hook nil
"Hook called by `ncptl-mode'.")
(defun ncptl-mode ()
"Major mode for editing coNCePTuaL files.
Currently, `ncptl-mode' does little more than support syntax highlighting."
(interactive)
(kill-all-local-variables)
(make-local-variable 'font-lock-defaults)
(make-local-variable 'comment-start-skip)
(make-local-variable 'comment-start)
(make-local-variable 'comment-end)
(make-local-variable 'indent-line-function)
(setq major-mode 'ncptl-mode
mode-name "coNCePTuaL"
font-lock-defaults '(ncptl-font-lock-keywords nil t)
indent-line-function 'ncptl-indent-line
local-abbrev-table ncptl-mode-abbrev-table
comment-start-skip "#+ *"
comment-start "#"
comment-end "")
(set-syntax-table ncptl-mode-syntax-table)
(use-local-map ncptl-mode-map)
(if ncptl-mode-hook
(run-hooks 'ncptl-mode-hook)))
(add-to-list 'auto-mode-alist '("\\.ncptl\\'" . ncptl-mode))
(provide 'ncptl-mode)
;;; ncptl-mode.el ends here