655 lines
27 KiB
EmacsLisp
655 lines
27 KiB
EmacsLisp
;;; Fortran mode for GNU Emacs (beta test version 1.21, Oct. 1, 1985)
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;;; Copyright (c) 1986 Free Software Foundation, Inc.
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;;; Written by Michael D. Prange (prange@erl.mit.edu)
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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 1, or (at your option)
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;; 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; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Author acknowledges help from Stephen Gildea <gildea@erl.mit.edu>
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;;; Bugs to bug-fortran-mode@erl.mit.edu.
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(defvar fortran-do-indent 3
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"*Extra indentation applied to `do' blocks.")
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(defvar fortran-if-indent 3
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"*Extra indentation applied to `if' blocks.")
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(defvar fortran-continuation-indent 5
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"*Extra indentation applied to `continuation' lines.")
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(defvar fortran-comment-indent-style 'fixed
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"*nil forces comment lines not to be touched,
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'fixed produces fixed comment indentation to comment-column,
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and 'relative indents to current fortran indentation plus comment-column.")
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(defvar fortran-comment-line-column 6
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"*Indentation for text in comment lines.")
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(defvar comment-line-start nil
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"*Delimiter inserted to start new full-line comment.")
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(defvar comment-line-start-skip nil
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"*Regexp to match the start of a full-line comment.")
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(defvar fortran-minimum-statement-indent 6
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"*Minimum indentation for fortran statements.")
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;; Note that this is documented in the v18 manuals as being a string
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;; of length one rather than a single character.
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;; The code in this file accepts either format for compatibility.
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(defvar fortran-comment-indent-char ?
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"*Character to be inserted for Fortran comment indentation.
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Normally a space.")
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(defvar fortran-line-number-indent 1
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"*Maximum indentation for Fortran line numbers.
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5 means right-justify them within their five-column field.")
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(defvar fortran-check-all-num-for-matching-do nil
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"*Non-nil causes all numbered lines to be treated as possible do-loop ends.")
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(defvar fortran-continuation-char ?$
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"*Character which is inserted in column 5 by \\[fortran-split-line]
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to begin a continuation line. Normally $.")
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(defvar fortran-comment-region "c$$$"
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"*String inserted by \\[fortran-comment-region] at start of each line in region.")
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(defvar fortran-electric-line-number t
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"*Non-nil causes line number digits to be moved to the correct column as typed.")
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(defvar fortran-startup-message t
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"*Non-nil displays a startup message when fortran-mode is first called.")
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(defvar fortran-column-ruler
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(concat "0 4 6 10 20 30 40 50 60 70\n"
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"[ ]|{ | | | | | | | | | | | | |}\n")
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"*String displayed above current line by \\[fortran-column-ruler].")
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(defconst fortran-mode-version "1.21")
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(defvar fortran-mode-syntax-table nil
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"Syntax table in use in fortran-mode buffers.")
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(if fortran-mode-syntax-table
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()
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(setq fortran-mode-syntax-table (make-syntax-table))
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(modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
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(modify-syntax-entry ?+ "." fortran-mode-syntax-table)
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(modify-syntax-entry ?- "." fortran-mode-syntax-table)
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(modify-syntax-entry ?* "." fortran-mode-syntax-table)
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(modify-syntax-entry ?/ "." fortran-mode-syntax-table)
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(modify-syntax-entry ?\' "\"" fortran-mode-syntax-table)
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(modify-syntax-entry ?\" "\"" fortran-mode-syntax-table)
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(modify-syntax-entry ?\\ "/" fortran-mode-syntax-table)
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(modify-syntax-entry ?. "w" fortran-mode-syntax-table)
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(modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
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(defvar fortran-mode-map ()
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"Keymap used in fortran mode.")
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(if fortran-mode-map
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()
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(setq fortran-mode-map (make-sparse-keymap))
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(define-key fortran-mode-map ";" 'fortran-abbrev-start)
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(define-key fortran-mode-map "\C-c;" 'fortran-comment-region)
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(define-key fortran-mode-map "\e\C-a" 'beginning-of-fortran-subprogram)
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(define-key fortran-mode-map "\e\C-e" 'end-of-fortran-subprogram)
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(define-key fortran-mode-map "\e;" 'fortran-indent-comment)
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(define-key fortran-mode-map "\e\C-h" 'mark-fortran-subprogram)
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(define-key fortran-mode-map "\e\n" 'fortran-split-line)
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(define-key fortran-mode-map "\e\C-q" 'fortran-indent-subprogram)
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(define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create)
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(define-key fortran-mode-map "\C-c\C-r" 'fortran-column-ruler)
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(define-key fortran-mode-map "\C-c\C-p" 'fortran-previous-statement)
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(define-key fortran-mode-map "\C-c\C-n" 'fortran-next-statement)
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(define-key fortran-mode-map "\t" 'fortran-indent-line)
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(define-key fortran-mode-map "0" 'fortran-electric-line-number)
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(define-key fortran-mode-map "1" 'fortran-electric-line-number)
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(define-key fortran-mode-map "2" 'fortran-electric-line-number)
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(define-key fortran-mode-map "3" 'fortran-electric-line-number)
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(define-key fortran-mode-map "4" 'fortran-electric-line-number)
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(define-key fortran-mode-map "5" 'fortran-electric-line-number)
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(define-key fortran-mode-map "6" 'fortran-electric-line-number)
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(define-key fortran-mode-map "7" 'fortran-electric-line-number)
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(define-key fortran-mode-map "8" 'fortran-electric-line-number)
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(define-key fortran-mode-map "9" 'fortran-electric-line-number))
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(defvar fortran-mode-abbrev-table nil)
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(if fortran-mode-abbrev-table
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()
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(define-abbrev-table 'fortran-mode-abbrev-table ())
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(let ((abbrevs-changed nil))
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(define-abbrev fortran-mode-abbrev-table ";b" "byte" nil)
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(define-abbrev fortran-mode-abbrev-table ";ch" "character" nil)
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(define-abbrev fortran-mode-abbrev-table ";cl" "close" nil)
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(define-abbrev fortran-mode-abbrev-table ";c" "continue" nil)
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(define-abbrev fortran-mode-abbrev-table ";cm" "common" nil)
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(define-abbrev fortran-mode-abbrev-table ";cx" "complex" nil)
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(define-abbrev fortran-mode-abbrev-table ";di" "dimension" nil)
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(define-abbrev fortran-mode-abbrev-table ";do" "double" nil)
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(define-abbrev fortran-mode-abbrev-table ";dc" "double complex" nil)
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(define-abbrev fortran-mode-abbrev-table ";dp" "double precision" nil)
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(define-abbrev fortran-mode-abbrev-table ";dw" "do while" nil)
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(define-abbrev fortran-mode-abbrev-table ";e" "else" nil)
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(define-abbrev fortran-mode-abbrev-table ";ed" "enddo" nil)
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(define-abbrev fortran-mode-abbrev-table ";el" "elseif" nil)
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(define-abbrev fortran-mode-abbrev-table ";en" "endif" nil)
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(define-abbrev fortran-mode-abbrev-table ";eq" "equivalence" nil)
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(define-abbrev fortran-mode-abbrev-table ";ex" "external" nil)
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(define-abbrev fortran-mode-abbrev-table ";ey" "entry" nil)
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(define-abbrev fortran-mode-abbrev-table ";f" "format" nil)
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(define-abbrev fortran-mode-abbrev-table ";fu" "function" nil)
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(define-abbrev fortran-mode-abbrev-table ";g" "goto" nil)
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(define-abbrev fortran-mode-abbrev-table ";im" "implicit" nil)
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(define-abbrev fortran-mode-abbrev-table ";ib" "implicit byte" nil)
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(define-abbrev fortran-mode-abbrev-table ";ic" "implicit complex" nil)
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(define-abbrev fortran-mode-abbrev-table ";ich" "implicit character" nil)
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(define-abbrev fortran-mode-abbrev-table ";ii" "implicit integer" nil)
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(define-abbrev fortran-mode-abbrev-table ";il" "implicit logical" nil)
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(define-abbrev fortran-mode-abbrev-table ";ir" "implicit real" nil)
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(define-abbrev fortran-mode-abbrev-table ";inc" "include" nil)
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(define-abbrev fortran-mode-abbrev-table ";in" "integer" nil)
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(define-abbrev fortran-mode-abbrev-table ";intr" "intrinsic" nil)
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(define-abbrev fortran-mode-abbrev-table ";l" "logical" nil)
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(define-abbrev fortran-mode-abbrev-table ";op" "open" nil)
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(define-abbrev fortran-mode-abbrev-table ";pa" "parameter" nil)
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(define-abbrev fortran-mode-abbrev-table ";pr" "program" nil)
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(define-abbrev fortran-mode-abbrev-table ";p" "print" nil)
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(define-abbrev fortran-mode-abbrev-table ";re" "real" nil)
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(define-abbrev fortran-mode-abbrev-table ";r" "read" nil)
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(define-abbrev fortran-mode-abbrev-table ";rt" "return" nil)
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(define-abbrev fortran-mode-abbrev-table ";rw" "rewind" nil)
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(define-abbrev fortran-mode-abbrev-table ";s" "stop" nil)
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(define-abbrev fortran-mode-abbrev-table ";su" "subroutine" nil)
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(define-abbrev fortran-mode-abbrev-table ";ty" "type" nil)
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(define-abbrev fortran-mode-abbrev-table ";w" "write" nil)))
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(defun fortran-mode ()
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"Major mode for editing fortran code.
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Tab indents the current fortran line correctly.
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`do' statements must not share a common `continue'.
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Type `;?' or `;\\[help-command]' to display a list of built-in abbrevs for Fortran keywords.
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Variables controlling indentation style and extra features:
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comment-start
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Normally nil in Fortran mode. If you want to use comments
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starting with `!', set this to the string \"!\".
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fortran-do-indent
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Extra indentation within do blocks. (default 3)
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fortran-if-indent
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Extra indentation within if blocks. (default 3)
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fortran-continuation-indent
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Extra indentation appled to continuation statements. (default 5)
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fortran-comment-line-column
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Amount of indentation for text within full-line comments. (default 6)
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fortran-comment-indent-style
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nil means don't change indentation of text in full-line comments,
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fixed means indent that text at column fortran-comment-line-column
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relative means indent at fortran-comment-line-column beyond the
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indentation for a line of code.
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Default value is fixed.
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fortran-comment-indent-char
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Character to be inserted instead of space for full-line comment
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indentation. (default is a space)
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fortran-minimum-statement-indent
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Minimum indentation for fortran statements. (default 6)
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fortran-line-number-indent
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Maximum indentation for line numbers. A line number will get
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less than this much indentation if necessary to avoid reaching
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column 5. (default 1)
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fortran-check-all-num-for-matching-do
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Non-nil causes all numbered lines to be treated as possible 'continue'
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statements. (default nil)
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fortran-continuation-char
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character to be inserted in column 5 of a continuation line.
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(default $)
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fortran-comment-region
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String inserted by \\[fortran-comment-region] at start of each line in
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region. (default \"c$$$\")
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fortran-electric-line-number
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Non-nil causes line number digits to be moved to the correct column
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as typed. (default t)
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fortran-startup-message
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Set to nil to inhibit message first time fortran-mode is used.
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Turning on Fortran mode calls the value of the variable fortran-mode-hook
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with no args, if that value is non-nil.
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\\{fortran-mode-map}"
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(interactive)
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(kill-all-local-variables)
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(if fortran-startup-message
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(message "Emacs Fortran mode version %s. Bugs to bug-fortran-mode@erl.mit.edu" fortran-mode-version))
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(setq fortran-startup-message nil)
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(setq local-abbrev-table fortran-mode-abbrev-table)
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(set-syntax-table fortran-mode-syntax-table)
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(make-local-variable 'indent-line-function)
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(setq indent-line-function 'fortran-indent-line)
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(make-local-variable 'comment-indent-hook)
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(setq comment-indent-hook 'fortran-comment-hook)
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(make-local-variable 'comment-line-start-skip)
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(setq comment-line-start-skip "^[Cc*][^ \t\n]*[ \t]*") ;[^ \t\n]* handles comment strings such as c$$$
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(make-local-variable 'comment-line-start)
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(setq comment-line-start "c")
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(make-local-variable 'comment-start-skip)
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(setq comment-start-skip "![ \t]*")
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(make-local-variable 'comment-start)
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(setq comment-start nil)
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(make-local-variable 'require-final-newline)
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(setq require-final-newline t)
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(make-local-variable 'abbrev-all-caps)
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(setq abbrev-all-caps t)
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(make-local-variable 'indent-tabs-mode)
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(setq indent-tabs-mode nil)
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(use-local-map fortran-mode-map)
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(setq mode-name "Fortran")
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(setq major-mode 'fortran-mode)
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(run-hooks 'fortran-mode-hook))
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(defun fortran-comment-hook ()
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(save-excursion
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(skip-chars-backward " \t")
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(max (+ 1 (current-column))
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comment-column)))
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(defun fortran-indent-comment ()
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"Align or create comment on current line.
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Existing comments of all types are recognized and aligned.
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If the line has no comment, a side-by-side comment is inserted and aligned
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if the value of comment-start is not nil.
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Otherwise, a separate-line comment is inserted, on this line
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or on a new line inserted before this line if this line is not blank."
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(interactive)
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(beginning-of-line)
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;; Recognize existing comments of either kind.
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(cond ((looking-at comment-line-start-skip)
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(fortran-indent-line))
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((re-search-forward comment-start-skip
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(save-excursion (end-of-line) (point)) t)
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(indent-for-comment))
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;; No existing comment.
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;; If side-by-side comments are defined, insert one,
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;; unless line is now blank.
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((and comment-start (not (looking-at "^[ \t]*$")))
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(end-of-line)
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(delete-horizontal-space)
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(indent-to (fortran-comment-hook))
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(insert comment-start))
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;; Else insert separate-line comment, making a new line if nec.
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(t
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(if (looking-at "^[ \t]*$")
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(delete-horizontal-space)
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(beginning-of-line)
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(insert "\n")
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(forward-char -1))
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(insert comment-line-start)
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(insert-char (if (stringp fortran-comment-indent-char)
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(aref fortran-comment-indent-char 0)
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fortran-comment-indent-char)
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(- (calculate-fortran-indent) (current-column))))))
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(defun fortran-comment-region (beg-region end-region arg)
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"Comments every line in the region.
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Puts fortran-comment-region at the beginning of every line in the region.
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BEG-REGION and END-REGION are args which specify the region boundaries.
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With non-nil ARG, uncomments the region."
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(interactive "*r\nP")
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(let ((end-region-mark (make-marker)) (save-point (point-marker)))
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(set-marker end-region-mark end-region)
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(goto-char beg-region)
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(beginning-of-line)
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(if (not arg) ;comment the region
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(progn (insert fortran-comment-region)
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(while (and (= (forward-line 1) 0)
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(< (point) end-region-mark))
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(insert fortran-comment-region)))
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(let ((com (regexp-quote fortran-comment-region))) ;uncomment the region
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(if (looking-at com)
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(delete-region (point) (match-end 0)))
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(while (and (= (forward-line 1) 0)
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(< (point) end-region-mark))
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(if (looking-at com)
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(delete-region (point) (match-end 0))))))
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(goto-char save-point)
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(set-marker end-region-mark nil)
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(set-marker save-point nil)))
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(defun fortran-abbrev-start ()
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"Typing \";\\[help-command]\" or \";?\" lists all the fortran abbrevs.
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Any other key combination is executed normally." ;\\[help-command] is just a way to print the value of the variable help-char.
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(interactive)
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(let (c)
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(insert last-command-char)
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(if (or (= (setq c (read-char)) ??) ;insert char if not equal to `?'
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(= c help-char))
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(fortran-abbrev-help)
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(setq unread-command-char c))))
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(defun fortran-abbrev-help ()
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"List the currently defined abbrevs in Fortran mode."
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(interactive)
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(message "Listing abbrev table...")
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(require 'abbrevlist)
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(list-one-abbrev-table fortran-mode-abbrev-table "*Help*")
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(message "Listing abbrev table...done"))
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(defun fortran-column-ruler ()
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"Inserts a column ruler momentarily above current line, till next keystroke.
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The ruler is defined by the value of fortran-column-ruler.
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The key typed is executed unless it is SPC."
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(interactive)
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(momentary-string-display
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fortran-column-ruler (save-excursion (beginning-of-line) (point))
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nil "Type SPC or any command to erase ruler."))
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(defun fortran-window-create ()
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"Makes the window 72 columns wide."
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(interactive)
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(let ((window-min-width 2))
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(split-window-horizontally 73))
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(other-window 1)
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(switch-to-buffer " fortran-window-extra" t)
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(select-window (previous-window)))
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(defun fortran-split-line ()
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"Break line at point and insert continuation marker and alignment."
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(interactive)
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(delete-horizontal-space)
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(if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip))
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(insert "\n" comment-line-start " ")
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(insert "\n " fortran-continuation-char))
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(fortran-indent-line))
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(defun delete-horizontal-regexp (chars)
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"Delete all characters in CHARS around point.
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CHARS is like the inside of a [...] in a regular expression
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except that ] is never special and \ quotes ^, - or \."
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(interactive "*s")
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(skip-chars-backward chars)
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(delete-region (point) (progn (skip-chars-forward chars) (point))))
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(defun fortran-electric-line-number (arg)
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"Self insert, but if part of a Fortran line number indent it automatically.
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Auto-indent does not happen if a numeric arg is used."
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(interactive "P")
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(if (or arg (not fortran-electric-line-number))
|
||
(self-insert-command arg)
|
||
(if (or (save-excursion (re-search-backward "[^ \t0-9]"
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(point))
|
||
t)) ;not a line number
|
||
(looking-at "[0-9]")) ;within a line number
|
||
(insert last-command-char)
|
||
(skip-chars-backward " \t")
|
||
(insert last-command-char)
|
||
(fortran-indent-line))))
|
||
|
||
(defun beginning-of-fortran-subprogram ()
|
||
"Moves point to the beginning of the current fortran subprogram."
|
||
(interactive)
|
||
(let ((case-fold-search t))
|
||
(beginning-of-line -1)
|
||
(re-search-backward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
|
||
(if (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")
|
||
(forward-line 1))))
|
||
|
||
(defun end-of-fortran-subprogram ()
|
||
"Moves point to the end of the current fortran subprogram."
|
||
(interactive)
|
||
(let ((case-fold-search t))
|
||
(beginning-of-line 2)
|
||
(re-search-forward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
|
||
(goto-char (match-beginning 0))
|
||
(forward-line 1)))
|
||
|
||
(defun mark-fortran-subprogram ()
|
||
"Put mark at end of fortran subprogram, point at beginning.
|
||
The marks are pushed."
|
||
(interactive)
|
||
(end-of-fortran-subprogram)
|
||
(push-mark (point))
|
||
(beginning-of-fortran-subprogram))
|
||
|
||
(defun fortran-previous-statement ()
|
||
"Moves point to beginning of the previous fortran statement.
|
||
Returns 'first-statement if that statement is the first
|
||
non-comment Fortran statement in the file, and nil otherwise."
|
||
(interactive)
|
||
(let (not-first-statement continue-test)
|
||
(beginning-of-line)
|
||
(setq continue-test
|
||
(or (looking-at
|
||
(concat "[ \t]*" (regexp-quote (char-to-string
|
||
fortran-continuation-char))))
|
||
(looking-at " [^ 0\n]")))
|
||
(while (and (setq not-first-statement (= (forward-line -1) 0))
|
||
(or (looking-at comment-line-start-skip)
|
||
(looking-at "[ \t]*$")
|
||
(looking-at " [^ 0\n]")
|
||
(looking-at (concat "[ \t]*" comment-start-skip)))))
|
||
(cond ((and continue-test
|
||
(not not-first-statement))
|
||
(message "Incomplete continuation statement."))
|
||
(continue-test
|
||
(fortran-previous-statement))
|
||
((not not-first-statement)
|
||
'first-statement))))
|
||
|
||
(defun fortran-next-statement ()
|
||
"Moves point to beginning of the next fortran statement.
|
||
Returns 'last-statement if that statement is the last
|
||
non-comment Fortran statement in the file, and nil otherwise."
|
||
(interactive)
|
||
(let (not-last-statement)
|
||
(beginning-of-line)
|
||
(while (and (setq not-last-statement (= (forward-line 1) 0))
|
||
(or (looking-at comment-line-start-skip)
|
||
(looking-at "[ \t]*$")
|
||
(looking-at " [^ 0\n]")
|
||
(looking-at (concat "[ \t]*" comment-start-skip)))))
|
||
(if (not not-last-statement)
|
||
'last-statement)))
|
||
|
||
(defun fortran-indent-line ()
|
||
"Indents current fortran line based on its contents and on previous lines."
|
||
(interactive)
|
||
(let ((cfi (calculate-fortran-indent)))
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(if (or (not (= cfi (fortran-current-line-indentation)))
|
||
(and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t)
|
||
(not (fortran-line-number-indented-correctly-p))))
|
||
(fortran-indent-to-column cfi)
|
||
(beginning-of-line)
|
||
(if (re-search-forward comment-start-skip
|
||
(save-excursion (end-of-line) (point)) 'move)
|
||
(fortran-indent-comment))))
|
||
;; Never leave point in left margin.
|
||
(if (< (current-column) cfi)
|
||
(move-to-column cfi))))
|
||
|
||
(defun fortran-indent-subprogram ()
|
||
"Properly indents the Fortran subprogram which contains point."
|
||
(interactive)
|
||
(save-excursion
|
||
(mark-fortran-subprogram)
|
||
(message "Indenting subprogram...")
|
||
(indent-region (point) (mark) nil))
|
||
(message "Indenting subprogram...done."))
|
||
|
||
(defun calculate-fortran-indent ()
|
||
"Calculates the fortran indent column based on previous lines."
|
||
(let (icol first-statement (case-fold-search t))
|
||
(save-excursion
|
||
(setq first-statement (fortran-previous-statement))
|
||
(if first-statement
|
||
(setq icol fortran-minimum-statement-indent)
|
||
(progn
|
||
(if (= (point) (point-min))
|
||
(setq icol fortran-minimum-statement-indent)
|
||
(setq icol (fortran-current-line-indentation)))
|
||
(skip-chars-forward " \t0-9")
|
||
(cond ((looking-at "if[ \t]*(")
|
||
(if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
|
||
(let (then-test) ;multi-line if-then
|
||
(while (and (= (forward-line 1) 0) ;search forward for then
|
||
(looking-at " [^ 0]")
|
||
(not (setq then-test (looking-at ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
|
||
then-test))
|
||
(setq icol (+ icol fortran-if-indent))))
|
||
((looking-at "\\(else\\|elseif\\)\\b")
|
||
(setq icol (+ icol fortran-if-indent)))
|
||
((looking-at "do\\b")
|
||
(setq icol (+ icol fortran-do-indent)))))))
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(cond ((looking-at "[ \t]*$"))
|
||
((looking-at comment-line-start-skip)
|
||
(cond ((eq fortran-comment-indent-style 'relative)
|
||
(setq icol (+ icol fortran-comment-line-column)))
|
||
((eq fortran-comment-indent-style 'fixed)
|
||
(setq icol fortran-comment-line-column))))
|
||
((or (looking-at (concat "[ \t]*"
|
||
(regexp-quote (char-to-string fortran-continuation-char))))
|
||
(looking-at " [^ 0\n]"))
|
||
(setq icol (+ icol fortran-continuation-indent)))
|
||
(first-statement)
|
||
((and fortran-check-all-num-for-matching-do
|
||
(looking-at "[ \t]*[0-9]+")
|
||
(fortran-check-for-matching-do))
|
||
(setq icol (- icol fortran-do-indent)))
|
||
(t
|
||
(skip-chars-forward " \t0-9")
|
||
(cond ((looking-at "end[ \t]*if\\b")
|
||
(setq icol (- icol fortran-if-indent)))
|
||
((looking-at "\\(else\\|elseif\\)\\b")
|
||
(setq icol (- icol fortran-if-indent)))
|
||
((and (looking-at "continue\\b")
|
||
(fortran-check-for-matching-do))
|
||
(setq icol (- icol fortran-do-indent)))
|
||
((looking-at "end[ \t]*do\\b")
|
||
(setq icol (- icol fortran-do-indent)))
|
||
((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
|
||
(not (= icol fortran-minimum-statement-indent)))
|
||
(message "Warning: `end' not in column %d. Probably an unclosed block." fortran-minimum-statement-indent))))))
|
||
(max fortran-minimum-statement-indent icol)))
|
||
|
||
(defun fortran-current-line-indentation ()
|
||
"Indentation of current line, ignoring Fortran line number or continuation.
|
||
This is the column position of the first non-whitespace character
|
||
aside from the line number and/or column 5 line-continuation character.
|
||
For comment lines, returns indentation of the first
|
||
non-indentation text within the comment."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(cond ((looking-at comment-line-start-skip)
|
||
(goto-char (match-end 0))
|
||
(skip-chars-forward
|
||
(if (stringp fortran-comment-indent-char)
|
||
fortran-comment-indent-char
|
||
(char-to-string fortran-comment-indent-char))))
|
||
((looking-at " [^ 0\n]")
|
||
(goto-char (match-end 0)))
|
||
(t
|
||
;; Move past line number.
|
||
(move-to-column 5)))
|
||
;; Move past whitespace.
|
||
(skip-chars-forward " \t")
|
||
(current-column)))
|
||
|
||
(defun fortran-indent-to-column (col)
|
||
"Indents current line with spaces to column COL.
|
||
notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
|
||
line, and this continuation character is retained on indentation;
|
||
2) If fortran-continuation-char is the first non-whitespace character,
|
||
this is a continuation line;
|
||
3) A non-continuation line which has a number as the first
|
||
non-whitespace character is a numbered line."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(if (looking-at comment-line-start-skip)
|
||
(if fortran-comment-indent-style
|
||
(let ((char (if (stringp fortran-comment-indent-char)
|
||
(aref fortran-comment-indent-char 0)
|
||
fortran-comment-indent-char)))
|
||
(goto-char (match-end 0))
|
||
(delete-horizontal-regexp (concat " \t" (char-to-string char)))
|
||
(insert-char char (- col (current-column)))))
|
||
(if (looking-at " [^ 0\n]")
|
||
(forward-char 6)
|
||
(delete-horizontal-space)
|
||
;; Put line number in columns 0-4
|
||
;; or put continuation character in column 5.
|
||
(cond ((eobp))
|
||
((= (following-char) fortran-continuation-char)
|
||
(indent-to 5)
|
||
(forward-char 1))
|
||
((looking-at "[0-9]+")
|
||
(let ((extra-space (- 5 (- (match-end 0) (point)))))
|
||
(if (< extra-space 0)
|
||
(message "Warning: line number exceeds 5-digit limit.")
|
||
(indent-to (min fortran-line-number-indent extra-space))))
|
||
(skip-chars-forward "0-9"))))
|
||
;; Point is now after any continuation character or line number.
|
||
;; Put body of statement where specified.
|
||
(delete-horizontal-space)
|
||
(indent-to col)
|
||
;; Indent any comment following code on the same line.
|
||
(if (re-search-forward comment-start-skip
|
||
(save-excursion (end-of-line) (point)) t)
|
||
(progn (goto-char (match-beginning 0))
|
||
(if (not (= (current-column) (fortran-comment-hook)))
|
||
(progn (delete-horizontal-space)
|
||
(indent-to (fortran-comment-hook)))))))))
|
||
|
||
(defun fortran-line-number-indented-correctly-p ()
|
||
"Return t if current line's line number is correctly indente.
|
||
Do not call if there is no line number."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(skip-chars-forward " \t")
|
||
(and (<= (current-column) fortran-line-number-indent)
|
||
(or (= (current-column) fortran-line-number-indent)
|
||
(progn (skip-chars-forward "0-9")
|
||
(= (current-column) 5))))))
|
||
|
||
(defun fortran-check-for-matching-do ()
|
||
"When called from a numbered statement, returns t
|
||
if matching 'do' is found, and nil otherwise."
|
||
(let (charnum
|
||
(case-fold-search t))
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(if (looking-at "[ \t]*[0-9]+")
|
||
(progn
|
||
(skip-chars-forward " \t")
|
||
(skip-chars-forward "0") ;skip past leading zeros
|
||
(setq charnum (buffer-substring (point)
|
||
(progn (skip-chars-forward "0-9")
|
||
(point))))
|
||
(beginning-of-line)
|
||
(and (re-search-backward
|
||
(concat "\\(^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]\\)\\|\\(^[ \t0-9]*do[ \t]*0*"
|
||
charnum "\\b\\)\\|\\(^[ \t]*0*" charnum "\\b\\)")
|
||
nil t)
|
||
(looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum))))))))
|
||
|
||
|