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988 lines
39 KiB
EmacsLisp
988 lines
39 KiB
EmacsLisp
;;; meta-mode.el --- major mode for editing Metafont or MetaPost sources -*- lexical-binding:t -*-
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;; Copyright (C) 1997, 2001-2015 Free Software Foundation, Inc.
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;; Author: Ulrik Vieth <vieth@thphy.uni-duesseldorf.de>
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;; Version: 1.0
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;; Keywords: Metafont, MetaPost, tex, languages
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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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;; GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Description:
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;;
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;; This Emacs Lisp package provides a major mode for editing Metafont
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;; or MetaPost sources. It includes all the necessary code to set up
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;; a major mode including an appropriate syntax table, keymap, and a
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;; mode-specific pull-down menu. It also provides a sophisticated set
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;; of font-lock patterns, a fancy indentation function adapted from
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;; AUCTeX's latex.el, and some basic mode-specific editing functions
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;; such as functions to move to the beginning or end of the enclosing
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;; environment, or to mark, re-indent, or comment-out environments.
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;; On the other hand, it doesn't yet provide any functionality for
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;; running Metafont or MetaPost in a shell buffer from within Emacs,
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;; but such functionality might be added later, either as part of this
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;; package or as a separate Emacs Lisp package.
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;; Customization:
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;;
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;; Following the usual Emacs Lisp coding conventions, the major modes
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;; defined in this package provide several hook variables to allow for
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;; local customization when entering the modes. In particular, there
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;; is a `meta-common-mode-hook' which applies to both modes as well as
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;; `metafont-mode-hook' and `metapost-mode-hook' which apply to the
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;; individual modes. In addition, there are several variables and
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;; regexps controlling e.g. the behavior of the indentation function,
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;; which may be customized via `edit-options'. Please refer to the
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;; docstrings in the code below for details.
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;; Availability:
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;;
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;; As of this version 1.0, this package will be uploaded to CTAN
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;; archives, where it shall find a permanent home, presumably in
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;; tex-archive/support/emacs-modes. It will also be submitted for
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;; integration into the GNU Emacs distribution at that time.
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;;
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;; History:
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;;
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;; v 0.0 -- 1997/02/01 UV Started writing meta-mode.el.
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;; v 0.1 -- 1997/02/02 UV Added preliminary set of font-lock patterns.
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;; v 0.2 -- 1997/02/03 UV Improved and debugged font-lock patterns.
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;; Added indent-line-function for TAB.
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;; v 0.3 -- 1997/02/17 UV Improved font-lock patterns and syntax table.
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;; Improved and debugged indentation function.
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;; v 0.4 -- 1997/02/18 UV Added functions to indent regions for M-C-q,
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;; also added a preliminary mode-specific menu.
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;; v 0.5 -- 1997/02/19 UV Added functions to skip to next or previous
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;; defun and to re-indent or comment-out defuns.
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;; v 0.6 -- 1997/02/20 UV More debugging, testing and clean-up.
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;; v 0.7 -- 1997/02/22 UV Use easymenu to define mode-specific menu.
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;; v 0.8 -- 1997/02/24 UV Added completion function for M-TAB.
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;; v 0.9 -- 1997/03/08 UV Added fill-paragraph function for comments.
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;; Also fixed a few remaining font-lock problems.
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;; Added meta-mode-load-hook to load meta-buf.el.
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;; v 1.0 -- 1997/04/07 UV Cleanup for official public release.
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;;
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;; Historical Footnote:
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;;
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;; This package was begun on February 1, 1997, exactly 20 years after
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;; the genesis of TeX took place according to Don Knuth's own account
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;; (cf. ``The Errors of TeX'', reprinted in ``Literate Programming'',
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;; Chapter 10, p. 249). What better date could there be to choose?
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;;
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;;; Code:
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(require 'easymenu)
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(defgroup meta-font nil
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"Major mode for editing Metafont or MetaPost sources."
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:link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
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:group 'languages)
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;;; Fontification.
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(defvar meta-font-lock-keywords
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(let ((input-keywords
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"\\(input\\|generate\\)")
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(begin-keywords
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(concat "\\(begin\\(char\\|fig\\|graph\\|logochar\\)\\|"
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"\\cmchar\\|dcchar\\|ecchar\\)"))
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(end-keywords
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"\\(end\\(char\\|fig\\|graph\\)\\)")
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(macro-keywords-1
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"\\(def\\|let\\|mode_def\\|vardef\\)")
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(macro-keywords-2
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"\\(primarydef\\|secondarydef\\|tertiarydef\\)")
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;(make-regexp
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; '("expr" "suffix" "text" "primary" "secondary" "tertiary") t)
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(args-keywords
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(concat "\\(expr\\|primary\\|s\\(econdary\\|uffix\\)\\|"
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"te\\(rtiary\\|xt\\)\\)"))
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;(make-regexp
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; '("boolean" "color" "numeric" "pair" "path" "pen" "picture"
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; "string" "transform" "newinternal") t)
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(type-keywords
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(concat "\\(boolean\\|color\\|n\\(ewinternal\\|umeric\\)\\|"
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"p\\(a\\(ir\\|th\\)\\|en\\|icture\\)\\|string\\|"
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"transform\\)"))
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;(make-regexp
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; '("for" "forever" "forsuffixes" "endfor"
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; "step" "until" "upto" "downto" "thru" "within"
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; "iff" "if" "elseif" "else" "fi" "exitif" "exitunless"
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; "let" "def" "vardef" "enddef" "mode_def"
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; "true" "false" "known" "unknown" "and" "or" "not"
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; "save" "interim" "inner" "outer" "relax"
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; "begingroup" "endgroup" "expandafter" "scantokens"
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; "generate" "input" "endinput" "end" "bye"
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; "message" "errmessage" "errhelp" "special" "numspecial"
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; "readstring" "readfrom" "write") t)
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(syntactic-keywords
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(concat "\\(and\\|b\\(egingroup\\|ye\\)\\|"
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"d\\(ef\\|ownto\\)\\|e\\(lse\\(\\|if\\)"
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"\\|nd\\(\\|def\\|for\\|group\\|input\\)"
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"\\|rr\\(help\\|message\\)"
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"\\|x\\(it\\(if\\|unless\\)\\|pandafter\\)\\)\\|"
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"f\\(alse\\|i\\|or\\(\\|ever\\|suffixes\\)\\)\\|"
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"generate\\|i\\(ff?\\|n\\(ner\\|put\\|terim\\)\\)\\|"
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"known\\|let\\|m\\(essage\\|ode_def\\)\\|"
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"n\\(ot\\|umspecial\\)\\|o\\(r\\|uter\\)\\|"
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"re\\(ad\\(from\\|string\\)\\|lax\\)\\|"
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"s\\(ave\\|cantokens\\|pecial\\|tep\\)\\|"
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"t\\(hru\\|rue\\)\\|"
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"u\\(n\\(known\\|til\\)\\|pto\\)\\|"
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"vardef\\|w\\(ithin\\|rite\\)\\)"))
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)
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(list
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;; embedded TeX code in btex ... etex
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(cons (concat "\\(btex\\|verbatimtex\\)"
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"[ \t\f]+\\(.*\\)[ \t\f]+"
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"\\(etex\\)")
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'((1 font-lock-keyword-face)
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(2 font-lock-string-face)
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(3 font-lock-keyword-face)))
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;; unary macro definitions: def, vardef, let
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(cons (concat "\\<" macro-keywords-1 "\\>"
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"[ \t\f]+\\(\\sw+\\|\\s_+\\|\\s.+\\)")
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'((1 font-lock-keyword-face)
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(2 font-lock-function-name-face)))
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;; binary macro definitions: <leveldef> x operator y
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(cons (concat "\\<" macro-keywords-2 "\\>"
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"[ \t\f]+\\(\\sw+\\)"
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"[ \t\f]*\\(\\sw+\\|\\s.+\\)"
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"[ \t\f]*\\(\\sw+\\)")
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'((1 font-lock-keyword-face)
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(2 font-lock-variable-name-face nil t)
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(3 font-lock-function-name-face nil t)
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(4 font-lock-variable-name-face nil t)))
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;; variable declarations: numeric, pair, color, ...
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(cons (concat "\\<" type-keywords "\\>"
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"\\([ \t\f]+\\(\\sw+\\)\\)*")
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'((1 font-lock-type-face)
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(font-lock-match-meta-declaration-item-and-skip-to-next
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(goto-char (match-end 1)) nil
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(1 font-lock-variable-name-face nil t))))
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;; argument declarations: expr, suffix, text, ...
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(cons (concat "\\<" args-keywords "\\>"
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"\\([ \t\f]+\\(\\sw+\\|\\s_+\\)\\)*")
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'((1 font-lock-type-face)
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(font-lock-match-meta-declaration-item-and-skip-to-next
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(goto-char (match-end 1)) nil
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(1 font-lock-variable-name-face nil t))))
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;; special case of arguments: expr x of y
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(cons (concat "\\(expr\\)[ \t\f]+\\(\\sw+\\)"
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"[ \t\f]+\\(of\\)[ \t\f]+\\(\\sw+\\)")
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'((1 font-lock-type-face)
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(2 font-lock-variable-name-face)
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(3 font-lock-keyword-face nil t)
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(4 font-lock-variable-name-face nil t)))
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;; syntactic keywords
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(cons (concat "\\<" syntactic-keywords "\\>")
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'font-lock-keyword-face)
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;; beginchar, beginfig
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(cons (concat "\\<" begin-keywords "\\>")
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'font-lock-keyword-face)
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;; endchar, endfig
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(cons (concat "\\<" end-keywords "\\>")
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'font-lock-keyword-face)
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;; input, generate
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(cons (concat "\\<" input-keywords "\\>"
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"[ \t\f]+\\(\\sw+\\)")
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'((1 font-lock-keyword-face)
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(2 font-lock-constant-face)))
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;; embedded Metafont/MetaPost code in comments
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(cons "|\\([^|]+\\)|"
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'(1 font-lock-constant-face t))
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))
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"Default expressions to highlight in Metafont or MetaPost mode.")
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(defun font-lock-match-meta-declaration-item-and-skip-to-next (limit)
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;; Match and move over Metafont/MetaPost declaration item after point.
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;;
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;; The expected syntax of an item is either "word" or "symbol",
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;; possibly ending with optional whitespace. Everything following
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;; the item (but belonging to it) is expected to by skipable by
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;; `forward-sexp'. The list of items is expected to be separated
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;; by commas and terminated by semicolons or equals signs.
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;;
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(if (looking-at "[ \t\f]*\\(\\sw+\\|\\s_+\\)")
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(save-match-data
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(condition-case nil
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(save-restriction
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;; Restrict to end of line, currently guaranteed to be LIMIT.
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(narrow-to-region (point-min) limit)
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(goto-char (match-end 1))
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;; Move over any item value, etc., to the next item.
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(while (not (looking-at "[ \t\f]*\\(\\(,\\)\\|;\\|=\\|$\\)"))
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(goto-char (or (scan-sexps (point) 1) (point-max))))
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(goto-char (match-end 2)))
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(error t)))))
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;;; Completion.
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;; The data used to prepare the following lists of primitives and
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;; standard macros available in Metafont or MetaPost was extracted
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;; from the original sources like this:
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;;
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;; grep '^primitive' texk-7.0/web2c/{mf,mp}.web |\
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;; sed 's/primitive(\("[a-zA-Z]*"\).*/\1/' > {mf,mp}_prim.list
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;;
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;; grep '\(let\|def\|vardef\|primarydef\|secondarydef\|tertiarydef\)'
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;; texmf/meta{font,post}/plain.{mf,mp} > {mf,mp}_plain.list
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(defconst meta-common-primitives-list
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'("ASCII" "addto" "also" "and" "angle" "atleast" "batchmode"
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"begingroup" "boolean" "boundarychar" "char" "charcode" "chardp"
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"charexists" "charext" "charht" "charic" "charlist" "charwd"
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"contour" "controls" "cosd" "curl" "cycle" "day" "decimal" "def"
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"delimiters" "designsize" "directiontime" "doublepath" "dump" "else"
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"elseif" "end" "enddef" "endfor" "endgroup" "endinput" "errhelp"
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"errmessage" "errorstopmode" "everyjob" "exitif" "expandafter"
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"expr" "extensible" "false" "fi" "floor" "fontdimen" "fontmaking"
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"for" "forever" "forsuffixes" "headerbyte" "hex" "if" "inner"
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"input" "interim" "intersectiontimes" "jobname" "kern" "known"
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"length" "let" "ligtable" "makepath" "makepen" "message" "mexp"
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"mlog" "month" "newinternal" "nonstopmode" "normaldeviate" "not"
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"nullpen" "nullpicture" "numeric" "oct" "odd" "of" "or" "outer"
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"pair" "path" "pausing" "pen" "pencircle" "penoffset" "picture"
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"point" "postcontrol" "precontrol" "primary" "primarydef" "quote"
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"randomseed" "readstring" "reverse" "rotated" "save" "scaled"
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"scantokens" "scrollmode" "secondary" "secondarydef" "shifted"
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"shipout" "show" "showdependencies" "showstats" "showstopping"
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"showtoken" "showvariable" "sind" "skipto" "slanted" "special"
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"sqrt" "step" "str" "string" "subpath" "substring" "suffix"
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"tension" "tertiary" "tertiarydef" "text" "time" "to"
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"tracingcapsules" "tracingchoices" "tracingcommands"
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"tracingequations" "tracingmacros" "tracingonline" "tracingoutput"
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"tracingrestores" "tracingspecs" "tracingstats" "tracingtitles"
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"transform" "transformed" "true" "turningnumber" "uniformdeviate"
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"unknown" "until" "vardef" "warningcheck" "withpen" "xpart"
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"xscaled" "xxpart" "xypart" "year" "ypart" "yscaled" "yxpart"
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"yypart" "zscaled")
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"List of primitives common to Metafont and MetaPost.")
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(defconst metafont-primitives-list
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'("at" "autorounding" "chardx" "chardy" "cull" "display"
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"dropping" "fillin" "from" "granularity" "hppp" "inwindow"
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"keeping" "numspecial" "openwindow" "proofing" "smoothing"
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"totalweight" "tracingedges" "tracingpens" "turningcheck" "vppp"
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"withweight" "xoffset" "yoffset")
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"List of primitives only defined in Metafont.")
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(defconst metapost-primitives-list
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'("arclength" "arctime" "bluepart" "bounded" "btex" "clip"
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"clipped" "color" "dashed" "dashpart" "etex" "filled" "fontpart"
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"fontsize" "greenpart" "infont" "linecap" "linejoin" "llcorner"
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"lrcorner" "miterlimit" "mpxbreak" "pathpart" "penpart"
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"prologues" "readfrom" "redpart" "setbounds" "stroked" "textpart"
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"textual" "tracinglostchars" "truecorners" "ulcorner" "urcorner"
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"verbatimtex" "withcolor" "within" "write")
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"List of primitives only defined in MetaPost.")
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(defconst meta-common-plain-macros-list
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'( "abs" "bot" "bye" "byte" "ceiling" "clear_pen_memory"
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"clearit" "clearpen" "clearxy" "counterclockwise" "cutdraw" "decr"
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"dir" "direction" "directionpoint" "div" "dotprod" "downto" "draw"
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"drawdot" "erase" "exitunless" "fill" "filldraw" "flex" "gobble"
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"hide" "incr" "interact" "interpath" "intersectionpoint" "inverse"
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"label" "labels" "lft" "loggingall" "magstep" "makelabel" "max"
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"min" "mod" "numtok" "penlabels" "penpos" "penstroke" "pickup"
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"range" "reflectedabout" "relax" "rotatedabout" "rotatedaround"
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"round" "rt" "savepen" "shipit" "softjoin" "solve" "stop"
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"superellipse" "takepower" "tensepath" "thru" "top" "tracingall"
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"tracingnone" "undraw" "undrawdot" "unfill" "unfilldraw"
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"unitvector" "upto" "whatever")
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"List of macros common to plain Metafont and MetaPost.")
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(defconst metafont-plain-macros-list
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'("beginchar" "change_width" "culldraw" "cullit" "cutoff"
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"define_blacker_pixels" "define_corrected_pixels"
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"define_good_x_pixels" "define_good_y_pixels"
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"define_horizontal_corrected_pixels" "define_pixels"
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"define_whole_blacker_pixels" "define_whole_pixels"
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"define_whole_vertical_blacker_pixels"
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"define_whole_vertical_pixels" "endchar" "fix_units"
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"font_coding_scheme" "font_extra_space" "font_identifier"
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"font_normal_shrink" "font_normal_space" "font_normal_stretch"
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"font_quad" "font_size" "font_slant" "font_x_height" "gfcorners"
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"good.bot" "good.lft" "good.rt" "good.top" "good.x" "good.y"
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"grayfont" "hround" "imagerules" "italcorr" "labelfont"
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"lowres_fix" "makebox" "makegrid" "maketicks" "mode_lowres"
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"mode_proof" "mode_setup" "mode_smoke" "nodisplays" "notransforms"
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"openit" "penrazor" "pensquare" "proofoffset" "proofrule"
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"proofrulethickness" "screenchars" "screenrule" "screenstrokes"
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"showit" "slantfont" "smode" "titlefont" "vround")
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"List of macros only defined in plain Metafont.")
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(defconst metapost-plain-macros-list
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'("arrowhead" "bbox" "beginfig" "buildcycle" "center" "cutafter"
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"cutbefore" "dashpattern" "dotlabel" "dotlabels" "drawarrow"
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"drawdblarrow" "drawoptions" "endfig" "image" "label" "off" "on"
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"thelabel")
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"List of macros only defined in plain MetaPost.")
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(defconst metapost-graph-macros-list
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'("augment" "auto.x" "auto.y" "autogrid" "begingraph" "endgraph"
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"format" "frame" "gdata" "gdotlabel" "gdraw" "gdrawarrow"
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"gdrawdblarrow" "gfill" "glabel" "grid" "itick" "otick" "plot"
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"setcoords" "setrange")
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"List of macros only defined in MetaPost \"graph\" package.")
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(defconst metapost-boxes-macros-list
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'("boxit" "boxjoin" "bpath" "circleit" "drawboxed" "drawboxes"
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"drawunboxed" "fixpos" "fixsize" "pic" "rboxit")
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"List of macros only defined in MetaPost \"boxes\" package.")
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(defvar metafont-symbol-list
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(append meta-common-primitives-list
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metafont-primitives-list
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meta-common-plain-macros-list
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metafont-plain-macros-list)
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"List of known symbols to complete in Metafont mode.")
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(defvar metapost-symbol-list
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(append meta-common-primitives-list
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metapost-primitives-list
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meta-common-plain-macros-list
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metapost-plain-macros-list
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metapost-graph-macros-list
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metapost-boxes-macros-list)
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"List of known symbols to complete in MetaPost mode.")
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(defvar meta-symbol-list nil
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"List of known symbols to complete in Metafont or MetaPost mode.")
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(defvar meta-symbol-changed nil
|
||
"Flag indicating whether `meta-symbol-list' has been initialized.")
|
||
|
||
(defvar meta-complete-list nil
|
||
; (list (list "\\<\\(\\sw+\\)" 1 'meta-symbol-list)
|
||
; (list "" 'ispell-complete-word))
|
||
"List of ways to perform completion in Metafont or MetaPost mode.
|
||
|
||
Each entry is a list with the following elements:
|
||
1. Regexp matching the preceding text.
|
||
2. A number indicating the subgroup in the regexp containing the text.
|
||
3. A function returning an alist of possible completions.
|
||
4. Text to append after a successful completion (if any).
|
||
|
||
Or alternatively:
|
||
1. Regexp matching the preceding text.
|
||
2. Function to do the actual completion.")
|
||
|
||
|
||
(defun meta-add-symbols (&rest entries)
|
||
"Add entries to list of known symbols in Metafont or MetaPost mode."
|
||
(if meta-symbol-changed
|
||
(setq meta-symbol-list (cons entries meta-symbol-list))
|
||
(setq meta-symbol-changed t)
|
||
(setq meta-symbol-list (cons entries meta-symbol-list))))
|
||
|
||
(defun meta-symbol-list ()
|
||
"Return value of list of known symbols in Metafont or MetaPost mode.
|
||
If the list was changed, sort the list and remove duplicates first."
|
||
(if (not meta-symbol-changed)
|
||
()
|
||
(setq meta-symbol-changed nil)
|
||
(message "Preparing completion list...")
|
||
;; sort list of symbols
|
||
(setq meta-symbol-list
|
||
(sort (mapcar 'meta-listify (apply 'append meta-symbol-list))
|
||
'meta-car-string-lessp))
|
||
;; remove duplicates
|
||
(let ((entry meta-symbol-list))
|
||
(while (and entry (cdr entry))
|
||
(let ((this (car entry))
|
||
(next (car (cdr entry))))
|
||
(if (not (string-equal (car this) (car next)))
|
||
(setq entry (cdr entry))
|
||
(if (> (length next) (length this))
|
||
(setcdr this (cdr next)))
|
||
(setcdr entry (cdr (cdr entry)))))))
|
||
(message "Preparing completion list... done"))
|
||
meta-symbol-list)
|
||
|
||
(defun meta-listify (a)
|
||
;; utility function used in `meta-add-symbols'
|
||
(if (listp a) a (list a)))
|
||
|
||
(defun meta-car-string-lessp (a b)
|
||
;; utility function used in `meta-add-symbols'
|
||
(string-lessp (car a) (car b)))
|
||
|
||
|
||
(defun meta-completions-at-point ()
|
||
(let ((list meta-complete-list)
|
||
entry)
|
||
(while list
|
||
(setq entry (car list)
|
||
list (cdr list))
|
||
(if (looking-back (car entry) (max (point-min) (- (point) 200)))
|
||
(setq list nil)))
|
||
(if (numberp (nth 1 entry))
|
||
(let* ((sub (nth 1 entry))
|
||
(close (nth 3 entry))
|
||
(begin (match-beginning sub))
|
||
(end (match-end sub))
|
||
(list (funcall (nth 2 entry))))
|
||
(list
|
||
begin end list
|
||
:exit-function
|
||
(unless (zerop (length close))
|
||
(lambda (_s finished)
|
||
(when (memq finished '(sole finished))
|
||
(if (looking-at (regexp-quote close))
|
||
(goto-char (match-end 0))
|
||
(insert close)))))))
|
||
(nth 1 entry))))
|
||
|
||
(define-obsolete-function-alias 'meta-complete-symbol
|
||
'completion-at-point "24.1")
|
||
|
||
;;; Indentation.
|
||
|
||
(defcustom meta-indent-level 2
|
||
"Indentation of begin-end blocks in Metafont or MetaPost mode."
|
||
:type 'integer
|
||
:group 'meta-font)
|
||
|
||
|
||
(defcustom meta-left-comment-regexp "%%+"
|
||
"Regexp matching comments that should be placed on the left margin."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
(defcustom meta-right-comment-regexp nil
|
||
"Regexp matching comments that should be placed on the right margin."
|
||
:type '(choice regexp
|
||
(const :tag "None" nil))
|
||
:group 'meta-font)
|
||
|
||
(defcustom meta-ignore-comment-regexp "%[^%]"
|
||
"Regexp matching comments whose indentation should not be touched."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
|
||
(defcustom meta-begin-environment-regexp
|
||
(concat "\\(begin\\(char\\|fig\\|gr\\(aph\\|oup\\)\\|logochar\\)\\|"
|
||
"def\\|for\\(\\|ever\\|suffixes\\)\\|if\\|mode_def\\|"
|
||
"primarydef\\|secondarydef\\|tertiarydef\\|vardef\\)")
|
||
"Regexp matching the beginning of environments to be indented."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
(defcustom meta-end-environment-regexp
|
||
(concat "\\(end\\(char\\|def\\|f\\(ig\\|or\\)\\|gr\\(aph\\|oup\\)\\)"
|
||
"\\|fi\\)")
|
||
"Regexp matching the end of environments to be indented."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
(defcustom meta-within-environment-regexp
|
||
; (concat "\\(e\\(lse\\(\\|if\\)\\|xit\\(if\\|unless\\)\\)\\)")
|
||
(concat "\\(else\\(\\|if\\)\\)")
|
||
"Regexp matching keywords within environments not to be indented."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
|
||
(defun meta-comment-indent ()
|
||
"Return the indentation for a comment in Metafont or MetaPost mode."
|
||
(if (and meta-left-comment-regexp
|
||
(looking-at meta-left-comment-regexp))
|
||
(current-column)
|
||
(skip-chars-backward "\t\f ")
|
||
(max (if (bolp) 0 (1+ (current-column)))
|
||
comment-column)))
|
||
|
||
(defun meta-indent-line ()
|
||
"Indent the line containing point as Metafont or MetaPost source."
|
||
(interactive)
|
||
(let ((indent (meta-indent-calculate)))
|
||
(if (/= (current-indentation) indent)
|
||
(save-excursion
|
||
(delete-region (line-beginning-position)
|
||
(progn (back-to-indentation) (point)))
|
||
(indent-to indent)))
|
||
(if (< (current-column) indent)
|
||
(back-to-indentation))))
|
||
|
||
(defun meta-indent-calculate ()
|
||
"Return the indentation of current line of Metafont or MetaPost source."
|
||
;; Indentation within strings is not considered as Meta* don't allow multi
|
||
;; line strings.
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(cond
|
||
;; Comments to the left margin.
|
||
((and meta-left-comment-regexp
|
||
(looking-at meta-left-comment-regexp))
|
||
0)
|
||
;; Comments to the right margin.
|
||
((and meta-right-comment-regexp
|
||
(looking-at meta-right-comment-regexp))
|
||
comment-column)
|
||
;; Comments best left alone.
|
||
((and meta-ignore-comment-regexp
|
||
(looking-at meta-ignore-comment-regexp))
|
||
(current-indentation))
|
||
;; Beginning of buffer.
|
||
((eq (point-at-bol) (point-min))
|
||
0)
|
||
;; Backindent at end of environments.
|
||
((meta-indent-looking-at-code
|
||
(concat "\\<" meta-end-environment-regexp "\\>"))
|
||
(- (meta-indent-current-indentation) meta-indent-level))
|
||
;; Backindent at keywords within environments.
|
||
((meta-indent-looking-at-code
|
||
(concat "\\<" meta-within-environment-regexp "\\>"))
|
||
(- (meta-indent-current-indentation) meta-indent-level))
|
||
(t (meta-indent-current-indentation)))))
|
||
|
||
(defun meta-indent-in-string-p ()
|
||
"Tell if the point is in a string."
|
||
(or (nth 3 (syntax-ppss))
|
||
(eq (get-text-property (point) 'face) font-lock-string-face)))
|
||
|
||
(defun meta-indent-looking-at-code (regexp)
|
||
"Same as `looking-at' but checks that the point is not in a string."
|
||
(unless (meta-indent-in-string-p)
|
||
(looking-at regexp)))
|
||
|
||
(defun meta-indent-previous-line ()
|
||
"Go to the previous line of code, skipping comments."
|
||
(skip-chars-backward "\n\t\f ")
|
||
(move-to-column (current-indentation))
|
||
;; Ignore comments.
|
||
(while (and (looking-at comment-start) (not (bobp)))
|
||
(skip-chars-backward "\n\t\f ")
|
||
(when (not (bobp))
|
||
(move-to-column (current-indentation)))))
|
||
|
||
(defun meta-indent-unfinished-line ()
|
||
"Tell if the current line of code ends with an unfinished expression."
|
||
(save-excursion
|
||
(end-of-line)
|
||
;; Skip backward the comments.
|
||
(let ((point-not-in-string (point)))
|
||
(while (search-backward comment-start (point-at-bol) t)
|
||
(unless (meta-indent-in-string-p)
|
||
(setq point-not-in-string (point))))
|
||
(goto-char point-not-in-string))
|
||
;; Search for the end of the previous expression.
|
||
(if (search-backward ";" (point-at-bol) t)
|
||
(progn (while (and (meta-indent-in-string-p)
|
||
(search-backward ";" (point-at-bol) t)))
|
||
(if (= (char-after) ?\;)
|
||
(forward-char)
|
||
(beginning-of-line)))
|
||
(beginning-of-line))
|
||
;; See if the last statement of the line is environment-related,
|
||
;; or exists at all.
|
||
(if (meta-indent-looking-at-code
|
||
(concat "[ \t\f]*\\($\\|" (regexp-quote comment-start)
|
||
"\\|\\<" meta-end-environment-regexp "\\>"
|
||
"\\|\\<" meta-begin-environment-regexp "\\>"
|
||
"\\|\\<" meta-within-environment-regexp "\\>\\)"))
|
||
nil
|
||
t)))
|
||
|
||
(defun meta-indent-current-indentation ()
|
||
"Return the indentation wanted for the current line of code."
|
||
(+ (meta-indent-current-nesting)
|
||
(if (save-excursion
|
||
(back-to-indentation)
|
||
(and (not (looking-at (concat "\\<" meta-end-environment-regexp "\\>"
|
||
"\\|\\<" meta-within-environment-regexp "\\>")))
|
||
(progn (meta-indent-previous-line)
|
||
(meta-indent-unfinished-line))))
|
||
meta-indent-level
|
||
0)))
|
||
|
||
(defun meta-indent-current-nesting ()
|
||
"Return the indentation according to the nearest environment keyword."
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(back-to-indentation)
|
||
(let ((to-add 0))
|
||
;; If we found some environment marker backward...
|
||
(if (catch 'found
|
||
(while (re-search-backward
|
||
(concat "(\\|)\\|\\<" meta-end-environment-regexp "\\>"
|
||
"\\|\\<" meta-begin-environment-regexp "\\>"
|
||
"\\|\\<" meta-within-environment-regexp "\\>")
|
||
nil t)
|
||
;; If we aren't in a string or in a comment, we've found something.
|
||
(unless (or (meta-indent-in-string-p)
|
||
(nth 4 (syntax-ppss)))
|
||
(cond ((= (char-after) ?\()
|
||
(setq to-add (+ to-add meta-indent-level)))
|
||
((= (char-after) ?\))
|
||
(setq to-add (- to-add meta-indent-level)))
|
||
(t (throw 'found t))))))
|
||
(progn
|
||
;; ... then use it to compute the current indentation.
|
||
(back-to-indentation)
|
||
(+ to-add (current-indentation) (meta-indent-level-count)
|
||
;; Compensate for backindent of end and within keywords.
|
||
(if (meta-indent-looking-at-code
|
||
(concat "\\<" meta-end-environment-regexp "\\>\\|"
|
||
"\\<" meta-within-environment-regexp "\\>"))
|
||
meta-indent-level
|
||
;; Compensate for unfinished line.
|
||
(if (save-excursion
|
||
(meta-indent-previous-line)
|
||
(meta-indent-unfinished-line))
|
||
(- meta-indent-level)
|
||
0))))
|
||
0)))))
|
||
|
||
(defun meta-indent-level-count ()
|
||
"Count indentation change for begin-end commands in the current line."
|
||
(save-excursion
|
||
(save-restriction
|
||
(let ((count 0))
|
||
(narrow-to-region
|
||
(point) (save-excursion
|
||
(re-search-forward "[^\\\\\"]%\\|\n\\|\\'" nil t)
|
||
(backward-char) (point)))
|
||
(while (re-search-forward "\\<\\sw+\\>\\|(\\|)" nil t)
|
||
(save-excursion
|
||
(goto-char (match-beginning 0))
|
||
(cond
|
||
;; Count number of begin-end keywords within line.
|
||
((meta-indent-looking-at-code
|
||
(concat "\\<" meta-begin-environment-regexp "\\>"))
|
||
(setq count (+ count meta-indent-level)))
|
||
((meta-indent-looking-at-code
|
||
(concat "\\<" meta-end-environment-regexp "\\>"))
|
||
(setq count (- count meta-indent-level))))))
|
||
count))))
|
||
|
||
|
||
|
||
;;; Editing commands.
|
||
|
||
(defcustom meta-begin-defun-regexp
|
||
(concat "\\(begin\\(char\\|fig\\|logochar\\)\\|def\\|mode_def\\|"
|
||
"primarydef\\|secondarydef\\|tertiarydef\\|vardef\\)")
|
||
"Regexp matching beginning of defuns in Metafont or MetaPost mode."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
(defcustom meta-end-defun-regexp
|
||
(concat "\\(end\\(char\\|def\\|fig\\)\\)")
|
||
"Regexp matching the end of defuns in Metafont or MetaPost mode."
|
||
:type 'regexp
|
||
:group 'meta-font)
|
||
|
||
|
||
(defun meta-beginning-of-defun (&optional arg)
|
||
"Move backward to beginning of a defun in Metafont or MetaPost code.
|
||
With numeric argument, do it that many times.
|
||
Negative arg -N means move forward to Nth following beginning of defun.
|
||
Returns t unless search stops due to beginning or end of buffer."
|
||
(interactive "p")
|
||
(if (or (null arg) (= 0 arg)) (setq arg 1))
|
||
(and arg (< arg 0) (not (eobp)) (forward-char 1))
|
||
(and (re-search-backward
|
||
(concat "\\<" meta-begin-defun-regexp "\\>") nil t arg)
|
||
(progn (goto-char (match-beginning 0))
|
||
(skip-chars-backward "%")
|
||
(skip-chars-backward " \t\f") t)))
|
||
|
||
(defun meta-end-of-defun (&optional arg)
|
||
"Move forward to end of a defun in Metafont or MetaPost code.
|
||
With numeric argument, do it that many times.
|
||
Negative argument -N means move back to Nth preceding end of defun.
|
||
Returns t unless search stops due to beginning or end of buffer."
|
||
(interactive "p")
|
||
(if (or (null arg) (= 0 arg)) (setq arg 1))
|
||
(and (< arg 0) (not (bobp)) (forward-line -1))
|
||
(and (re-search-forward
|
||
(concat "\\<" meta-end-defun-regexp "\\>") nil t arg)
|
||
(progn (goto-char (match-end 0))
|
||
(skip-chars-forward ";")
|
||
(skip-chars-forward " \t\f")
|
||
(if (looking-at "\n") (forward-line 1)) t)))
|
||
|
||
|
||
(defun meta-comment-region (beg end &optional arg)
|
||
"Comment out active region as Metafont or MetaPost source."
|
||
(interactive "r")
|
||
(comment-region beg end arg))
|
||
|
||
(defun meta-uncomment-region (beg end)
|
||
"Uncomment active region as Metafont or MetaPost source."
|
||
(interactive "r")
|
||
(comment-region beg end -1))
|
||
|
||
(defun meta-comment-defun (&optional arg)
|
||
"Comment out current environment as Metafont or MetaPost source.
|
||
With prefix argument, uncomment the environment.
|
||
The environment used is the one that contains point or follows point."
|
||
(interactive "P")
|
||
(save-excursion
|
||
(let* ((end (if (meta-end-of-defun) (point) (point-max)))
|
||
(beg (if (meta-beginning-of-defun) (point) (point-min))))
|
||
(comment-region beg end arg))))
|
||
|
||
(defun meta-uncomment-defun ()
|
||
"Uncomment current environment as Metafont or MetaPost source."
|
||
(interactive)
|
||
(meta-comment-defun -1))
|
||
|
||
|
||
(defun meta-indent-region (beg end)
|
||
"Indent the active region as Metafont or MetaPost source."
|
||
(interactive "r")
|
||
(indent-region beg end nil))
|
||
|
||
(defun meta-indent-buffer ()
|
||
"Indent the whole buffer contents as Metafont or MetaPost source."
|
||
(interactive)
|
||
(save-excursion
|
||
(indent-region (point-min) (point-max) nil)))
|
||
|
||
(defun meta-indent-defun ()
|
||
"Indent the current environment as Metafont or MetaPost source.
|
||
The environment indented is the one that contains point or follows point."
|
||
(interactive)
|
||
(save-excursion
|
||
(let* ((end (if (meta-end-of-defun) (point) (point-max)))
|
||
(beg (if (meta-beginning-of-defun) (point) (point-min))))
|
||
(indent-region beg end nil))))
|
||
|
||
|
||
(defun meta-mark-defun ()
|
||
"Put mark at end of the environment, point at the beginning.
|
||
The environment marked is the one that contains point or follows point."
|
||
(interactive)
|
||
(push-mark (point))
|
||
(meta-end-of-defun)
|
||
(push-mark (point) nil t)
|
||
(meta-beginning-of-defun))
|
||
|
||
|
||
|
||
;;; Syntax table, keymap and menu.
|
||
|
||
(define-abbrev-table 'meta-mode-abbrev-table ()
|
||
"Abbrev table used in Metafont or MetaPost mode.")
|
||
|
||
(defvar meta-common-mode-syntax-table
|
||
(let ((st (make-syntax-table)))
|
||
;; FIXME: This goes against the convention!
|
||
;; underscores are word constituents
|
||
(modify-syntax-entry ?_ "w" st)
|
||
;; miscellaneous non-word symbols
|
||
(modify-syntax-entry ?# "_" st)
|
||
(modify-syntax-entry ?@ "_" st)
|
||
(modify-syntax-entry ?$ "_" st)
|
||
(modify-syntax-entry ?? "_" st)
|
||
(modify-syntax-entry ?! "_" st)
|
||
;; binary operators
|
||
(modify-syntax-entry ?& "." st)
|
||
(modify-syntax-entry ?+ "." st)
|
||
(modify-syntax-entry ?- "." st)
|
||
(modify-syntax-entry ?/ "." st)
|
||
(modify-syntax-entry ?* "." st)
|
||
(modify-syntax-entry ?. "." st)
|
||
(modify-syntax-entry ?: "." st)
|
||
(modify-syntax-entry ?= "." st)
|
||
(modify-syntax-entry ?< "." st)
|
||
(modify-syntax-entry ?> "." st)
|
||
(modify-syntax-entry ?| "." st)
|
||
;; opening and closing delimiters
|
||
(modify-syntax-entry ?\( "()" st)
|
||
(modify-syntax-entry ?\) ")(" st)
|
||
(modify-syntax-entry ?\[ "(]" st)
|
||
(modify-syntax-entry ?\] ")[" st)
|
||
(modify-syntax-entry ?\{ "(}" st)
|
||
(modify-syntax-entry ?\} "){" st)
|
||
;; comment character
|
||
(modify-syntax-entry ?% "<" st)
|
||
(modify-syntax-entry ?\n ">" st)
|
||
;; escape character, needed for embedded TeX code
|
||
(modify-syntax-entry ?\\ "\\" st)
|
||
st)
|
||
"Syntax table used in Metafont or MetaPost mode.")
|
||
|
||
(define-obsolete-variable-alias 'meta-mode-map 'meta-common-mode-map "24.1")
|
||
(defvar meta-common-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
;; Comment Paragraphs:
|
||
;; (define-key map "\M-a" 'backward-sentence)
|
||
;; (define-key map "\M-e" 'forward-sentence)
|
||
;; (define-key map "\M-h" 'mark-paragraph)
|
||
;; (define-key map "\M-q" 'fill-paragraph)
|
||
;; Navigation:
|
||
(define-key map "\M-\C-a" 'meta-beginning-of-defun)
|
||
(define-key map "\M-\C-e" 'meta-end-of-defun)
|
||
(define-key map "\M-\C-h" 'meta-mark-defun)
|
||
;; Indentation:
|
||
(define-key map "\M-\C-q" 'meta-indent-defun)
|
||
(define-key map "\C-c\C-qe" 'meta-indent-defun)
|
||
(define-key map "\C-c\C-qr" 'meta-indent-region)
|
||
(define-key map "\C-c\C-qb" 'meta-indent-buffer)
|
||
;; Commenting Out:
|
||
(define-key map "\C-c%" 'meta-comment-defun)
|
||
;; (define-key map "\C-uC-c%" 'meta-uncomment-defun)
|
||
(define-key map "\C-c;" 'meta-comment-region)
|
||
(define-key map "\C-c:" 'meta-uncomment-region)
|
||
;; Symbol Completion:
|
||
(define-key map "\M-\t" 'completion-at-point)
|
||
;; Shell Commands:
|
||
;; (define-key map "\C-c\C-c" 'meta-command-file)
|
||
;; (define-key map "\C-c\C-k" 'meta-kill-job)
|
||
;; (define-key map "\C-c\C-l" 'meta-recenter-output)
|
||
map)
|
||
"Keymap used in Metafont or MetaPost mode.")
|
||
|
||
(easy-menu-define
|
||
meta-mode-menu meta-common-mode-map
|
||
"Menu used in Metafont or MetaPost mode."
|
||
(list "Meta"
|
||
["Forward Environment" meta-beginning-of-defun t]
|
||
["Backward Environment" meta-end-of-defun t]
|
||
"--"
|
||
["Indent Line" meta-indent-line t]
|
||
["Indent Environment" meta-indent-defun t]
|
||
["Indent Region" meta-indent-region
|
||
:active (meta-mark-active)]
|
||
["Indent Buffer" meta-indent-buffer t]
|
||
"--"
|
||
["Comment Out Environment" meta-comment-defun t]
|
||
["Uncomment Environment" meta-uncomment-defun t]
|
||
["Comment Out Region" meta-comment-region
|
||
:active (meta-mark-active)]
|
||
["Uncomment Region" meta-uncomment-region
|
||
:active (meta-mark-active)]
|
||
"--"
|
||
["Complete Symbol" completion-at-point t]
|
||
; "--"
|
||
; ["Command on Buffer" meta-command-file t]
|
||
; ["Kill Job" meta-kill-job t]
|
||
; ["Recenter Output Buffer" meta-recenter-output-buffer t]
|
||
))
|
||
|
||
;; Compatibility: XEmacs doesn't have the `mark-active' variable.
|
||
(defun meta-mark-active ()
|
||
"Return whether the mark and region are currently active in this buffer."
|
||
(if (boundp 'mark-active) mark-active (mark)))
|
||
|
||
|
||
|
||
;;; Hook variables.
|
||
|
||
(defcustom meta-mode-load-hook nil
|
||
"Hook evaluated when first loading Metafont or MetaPost mode."
|
||
:type 'hook
|
||
:group 'meta-font)
|
||
|
||
(defcustom meta-common-mode-hook nil
|
||
"Hook evaluated by both `metafont-mode' and `metapost-mode'."
|
||
:type 'hook
|
||
:group 'meta-font)
|
||
|
||
(defcustom metafont-mode-hook nil
|
||
"Hook evaluated by `metafont-mode' after `meta-common-mode-hook'."
|
||
:type 'hook
|
||
:group 'meta-font)
|
||
(defcustom metapost-mode-hook nil
|
||
"Hook evaluated by `metapost-mode' after `meta-common-mode-hook'."
|
||
:type 'hook
|
||
:group 'meta-font)
|
||
|
||
|
||
|
||
;;; Initialization.
|
||
|
||
(define-derived-mode meta-common-mode prog-mode "-Meta-common-"
|
||
"Common initialization for Metafont or MetaPost mode."
|
||
:abbrev-table meta-mode-abbrev-table
|
||
(set (make-local-variable 'paragraph-start)
|
||
(concat page-delimiter "\\|$"))
|
||
(set (make-local-variable 'paragraph-separate)
|
||
(concat page-delimiter "\\|$"))
|
||
|
||
(set (make-local-variable 'paragraph-ignore-fill-prefix) t)
|
||
|
||
(set (make-local-variable 'comment-start-skip) "%+[ \t\f]*")
|
||
(set (make-local-variable 'comment-start) "%")
|
||
(set (make-local-variable 'comment-end) "")
|
||
(set (make-local-variable 'comment-multi-line) nil)
|
||
|
||
;; We use `back-to-indentation' but \f is no indentation sign.
|
||
(modify-syntax-entry ?\f "_ ")
|
||
|
||
(set (make-local-variable 'parse-sexp-ignore-comments) t)
|
||
|
||
(add-hook 'completion-at-point-functions #'meta-completions-at-point nil t)
|
||
(set (make-local-variable 'comment-indent-function) #'meta-comment-indent)
|
||
(set (make-local-variable 'indent-line-function) #'meta-indent-line)
|
||
;; No need to define a mode-specific 'indent-region-function.
|
||
;; Simply use the generic 'indent-region and 'comment-region.
|
||
|
||
;; Set defaults for font-lock mode.
|
||
(set (make-local-variable 'font-lock-defaults)
|
||
'(meta-font-lock-keywords
|
||
nil nil ((?_ . "w")) nil
|
||
(font-lock-comment-start-regexp . "%")))
|
||
|
||
;; Activate syntax table, keymap and menu.
|
||
(easy-menu-add meta-mode-menu))
|
||
|
||
|
||
;;;###autoload
|
||
(define-derived-mode metafont-mode meta-common-mode "Metafont"
|
||
"Major mode for editing Metafont sources."
|
||
;; Set defaults for completion function.
|
||
(set (make-local-variable 'meta-symbol-list) nil)
|
||
(set (make-local-variable 'meta-symbol-changed) nil)
|
||
(apply 'meta-add-symbols metafont-symbol-list)
|
||
(set (make-local-variable 'meta-complete-list)
|
||
(list (list "\\<\\(\\sw+\\)" 1 'meta-symbol-list)
|
||
(list "" 'ispell-complete-word))))
|
||
|
||
;;;###autoload
|
||
(define-derived-mode metapost-mode meta-common-mode "MetaPost"
|
||
"Major mode for editing MetaPost sources."
|
||
;; Set defaults for completion function.
|
||
(set (make-local-variable 'meta-symbol-list) nil)
|
||
(set (make-local-variable 'meta-symbol-changed) nil)
|
||
(apply 'meta-add-symbols metapost-symbol-list)
|
||
(set (make-local-variable 'meta-complete-list)
|
||
(list (list "\\<\\(\\sw+\\)" 1 'meta-symbol-list)
|
||
(list "" 'ispell-complete-word))))
|
||
|
||
|
||
;;; Just in case ...
|
||
|
||
(provide 'meta-mode)
|
||
(run-hooks 'meta-mode-load-hook)
|
||
|
||
;;; meta-mode.el ends here
|