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- ;;; fortran.el --- Fortran mode for GNU Emacs
-
- ;;; Copyright (c) 1992 Free Software Foundation, Inc.
-
- ;; Author: Michael D. Prange <prange@erl.mit.edu>
- ;; Maintainer: bug-fortran-mode@erl.mit.edu
- ;; Version 1.28.7
- ;; Keywords: languages
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- ;;; Commentary:
-
- ;; fortran.el version 1.28.7, October 20, 1992
- ;; Many contributions and valuable suggestions by
- ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
- ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
- ;; Gary Sabot and Richard Stallman.
-
- ;; Maintained (as of version 1.28) by Stephen A. Wood (saw@cebaf.gov)
-
- ;;; This version is an update of version 1.21 (Oct 1, 1985).
- ;;; Updated by Stephen A. Wood (saw@cebaf.gov) to use tab format
- ;;; continuation control and indentation. (Digit after TAB to signify
- ;;; continuation line.
-
- ;;; Notes to fortran-mode version 1.28
- ;;; 1. Fortran mode can support either fixed format or tab format. Fixed
- ;;; format is where statements start in column 6 (first column is 0)
- ;;; and continuation lines are denoted by a character in column 5.
- ;;; In tab mode, statements follow a tab character. Continuation lines
- ;;; are where the first character on a line is a tab and the second is
- ;;; a digit from 1 to 9.
- ;;; 2. When fortran mode is called, the buffer is analyzed to determine what
- ;;; kind of formating is used. Starting at the top of the file, lines
- ;;; are scanned until a line is found that begins with a tab or 6 spaces.
- ;;; The mode for that buffer is then set to either tab or fixed format
- ;;; based on that line. If no line starting with a tab or 6 spaces is
- ;;; found before the end of the buffer or in the first 100 lines, the
- ;;; mode is set from the variable `fortran-tab-mode-default'. t is tab
- ;;; mode, nil is fixed format mode. By default, fixed format mode is used.
- ;;; To use tabbing mode as the default, put the following line in .emacs
- ;;; (setq fortran-tab-mode-default t)
- ;;; This line should not be in the hook since the hook is called only
- ;;; after the file is analyzed.
- ;;; To force a particular mode independent of the analysis, attach
- ;;; (fortran-tab-mode t) or (fortran-tab-mode nil)
- ;;; to fortran-mode-hook.
- ;;; 3. The command `fortran-tab-mode' will toggle between fixed and tab
- ;;; formatting modes. The file will not automatically be reformatted,
- ;;; but either `indent-region' or `fortran-indent-subprogram' can be
- ;;; used to reformat portions of the file.
- ;;; 4. Several abbreviations have been added. Abbreviation mode is turned
- ;;; on by default.
- ;;; 5. The routine fortran-blink-matching if has been incorporated (from
- ;;; experimental version 1.27). If the variable of the same name is set
- ;;; to t, the the matching if statement is blinked whenever an endif
- ;;; line is indented.
- ;;; 6. C-c C-w is now bound to fortran-window-create-momentarily (from
- ;;; experimental version 1.27.)
- ;;; 7. LFD is now bound to fortran-reindent-then-newline-and-indent.
- ;;; 8. fortran-continuation-string (was fortran-continuation-char) is now
- ;;; a string rather than a character.
- ;;; 9. Fixed a bug from 1.21 that gave max-lisp-eval-depth exceeded when
- ;;; Comments lines had !'s in them.
- ;;; 10. DEC fortran recognizes a & in the first column as a continuation.
- ;;; character. This mode does not recognize the & as a continuation
- ;;; character.
- ;;; 11. fortran-blink-matching-if still is in effect when indenting a region.
- ;;; Is this a desirable effect? (It looks kind of neat)
- ;;; 12. If you strike a digit and there are exactly 5 characters, all spaces
- ;;; to the left of the point, the digit will be inserted in place to
- ;;; serve as a continuation line marker. Similarly, if the only thing to
- ;;; the left of the point is a single tab, and the last command issued
- ;;; was neither fortran-indent-line (TAB) or fortran-reindent-then-newline-
- ;;; and-indent (LFD), the digit is inserted as a tab format style
- ;;; continuation character.
- ;;; 13. Both modes should usually work with tab-width set to other than 8.
- ;;; However, in tab-mode, if tab-width is less than 6, the column number
- ;;; for the minimum indentation is set to 6 so that all line numbers will
- ;;; have have a tab after them. This may be a bit ugly, but why would
- ;;; you want to use a tab-width other than 8 anyway?
- ;;; 14. When in tab mode, the fortran column ruler will not be correct if
- ;;; tab-width is not 8.
- ;;; 15. Fortran-electic-line-number will work properly in overwrite-mode.
- ;;; Thanks to Mark Neale (mjn@jet.uk)
- ;;; 16. Fixed bug in fortran-previous-statement that gives "Incomplete
- ;;; continuation statement." when used on the first statement which
- ;;; happens to be a comment that begins with the same character as
- ;;; `fortran-continuation-string'
- ;;; 17. If `comment-start-skip' is found in a fortran string, no indenting is
- ;;; done. Thanks to Ralf Fassel (ralf@up3aud1.gwdg.de) for patches.
- ;;; This awaits a hopeful future multimode solution in which
- ;;; indentation/spacing inside of constants doesn't get touched when
- ;;; comment delimeter characters happen to be inside the constant.
- ;;; 18. Changed meaning of `fortran-comment-line-column'. If
- ;;; If `fortran-comment-indent-style' is 'fixed, then, comments are
- ;;; indented to `fortran-minimum-statement-indent' plus
- ;;; `fortran-comment-line-column'. If the style is `relative', the
- ;;; meaning remains the same in that the line-column value is added to
- ;;; the current indentation level. The default value is now zero.
- ;;; (Thanks to Ulrich Mueller (ulm@vsnhd1.cern.ch).
- ;;; 19. Fixed infinite loop in fortran-next-statement that occurs with emacs
- ;;; versions 18.55 and before because of a difference in the behavior
- ;;; of (forward-line 1) on a line that is the last in the buffer which
- ;;; doesn't have a newline. (Thanks to Ulrich Mueller)
- ;;; 20. Added indentation for structure, union and map blocks (Fortran 90
- ;;; and other post f77 fortrans.) at the suggestion of Dr. Anil Gokhale
- ;;; (avg@dynsim1.litwin.com).
- ;;; 21. The command fortran-auto-fill-mode toggles on and off fortran-auto-fill
- ;;; mode. By default it is off, and the fill column is 72. (Thanks to
- ;;; (Mark Neale for the code for auto fill.) Will split line before
- ;;; whitespace, commas, or operators. Won't break stuff betweek quotes,
- ;;; unless it is a comment line. Put (fortran-auto-fill-mode 1) into
- ;;; fortran-mode-hook to have auto fill mode automatically on.
- ;;; 22. If auto-fill-mode is on, fortran-indent-line will call the auto fill
- ;;; code to make sure that lines are not to long after indentation. This
- ;;; suggestion and improvements to auto filling provided by Eric Prestemon
- ;;; (ecprest@pocorvares.er.usgs.gov.
- ;;; 23. comment-line-start-skip treats cpp directives (beginning with #) as
- ;;; unindentable comments.
- ;;; 24. where, elsewhere indenting now supported for F90.
- ;;;
-
- ;;; Bugs to bug-fortran-mode@erl.mit.edu
-
- (defconst fortran-mode-version "version 1.28.7")
-
- ;;; Code:
-
- ;;;###autoload
- (defvar fortran-tab-mode-default nil
- "*Default tabbing/carriage control style for empty files in fortran mode.
- t indicates that tab-digit style of continuation control will be used.
- nil indicates that continuation lines are marked with a character in
- column 6.")
-
- (defvar fortran-do-indent 3
- "*Extra indentation applied to `do' blocks.")
-
- (defvar fortran-if-indent 3
- "*Extra indentation applied to `if' blocks.")
-
- (defvar fortran-structure-indent 3
- "*Extra indentation applied to `structure', `union' and `map' blocks.")
-
- (defvar fortran-continuation-indent 5
- "*Extra indentation applied to `continuation' lines.")
-
- (defvar fortran-comment-indent-style 'fixed
- "*nil forces comment lines not to be touched,
- 'fixed produces fixed comment indentation to fortran-comment-line-column
- beyond fortran-minimum-statement-indent, and 'relative indents to current
- fortran indentation plus fortran-comment-line-column.")
-
- (defvar fortran-comment-line-column 0
- "*Amount of extra indentation for text within full-line comments.")
-
- (defvar comment-line-start nil
- "*Delimiter inserted to start new full-line comment.")
-
- (defvar comment-line-start-skip nil
- "*Regexp to match the start of a full-line comment.")
-
- (defvar fortran-minimum-statement-indent 6
- "*Minimum indentation for fortran statements.")
-
- ;; Note that this is documented in the v18 manuals as being a string
- ;; of length one rather than a single character.
- ;; The code in this file accepts either format for compatibility.
- (defvar fortran-comment-indent-char " "
- "*Single-character string inserted for Fortran comment indentation.
- Normally a space.")
-
- (defvar fortran-line-number-indent 1
- "*Maximum indentation for Fortran line numbers.
- 5 means right-justify them within their five-column field.")
-
- (defvar fortran-check-all-num-for-matching-do nil
- "*Non-nil causes all numbered lines to be treated as possible do-loop ends.")
-
- (defvar fortran-blink-matching-if nil
- "*From a fortran `endif' statement, blink the matching `if' statement.")
-
- (defvar fortran-continuation-string "$"
- "*Single-character string used for fortran continuation lines.
- In fixed format continuation style, this character is inserted in
- column 6 by \\[fortran-split-line] to begin a continuation line.
- Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
- convert the line into a continuation line of the appropriate style.
- Normally $.")
-
- (defvar fortran-comment-region "c$$$"
- "*String inserted by \\[fortran-comment-region]\
- at start of each line in region.")
-
- (defvar fortran-electric-line-number t
- "*Non-nil causes line number digits to be moved to the correct column as\
- typed.")
-
- (defvar fortran-startup-message t
- "*Non-nil displays a startup message when Fortran mode is first called.")
-
- (defvar fortran-column-ruler " "
- "*String displayed above current line by \\[fortran-column-ruler].")
-
- (defconst bug-fortran-mode "bug-fortran-mode@erl.mit.edu"
- "Address of mailing list for Fortran mode bugs.")
-
- (defvar fortran-mode-syntax-table nil
- "Syntax table in use in Fortran mode buffers.")
-
- (defvar fortran-analyze-depth 100
- "Number of lines to scan to determine whether to use fixed or tab format\
- style.")
-
- (defvar fortran-break-before-delimiters t
- "Non-nil causes fortran-do-auto-fill breaks lines before delimeters.")
-
- (if fortran-mode-syntax-table
- ()
- (setq fortran-mode-syntax-table (make-syntax-table))
- (modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?\r " " fortran-mode-syntax-table)
- (modify-syntax-entry ?+ "." fortran-mode-syntax-table)
- (modify-syntax-entry ?- "." fortran-mode-syntax-table)
- (modify-syntax-entry ?= "." fortran-mode-syntax-table)
- (modify-syntax-entry ?* "." fortran-mode-syntax-table)
- (modify-syntax-entry ?/ "." fortran-mode-syntax-table)
- (modify-syntax-entry ?\' "\"" fortran-mode-syntax-table)
- (modify-syntax-entry ?\" "\"" fortran-mode-syntax-table)
- (modify-syntax-entry ?\\ "/" fortran-mode-syntax-table)
- (modify-syntax-entry ?. "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?_ "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
-
- (defvar fortran-mode-map ()
- "Keymap used in fortran mode.")
- (if fortran-mode-map
- ()
- (setq fortran-mode-map (make-sparse-keymap))
- (define-key fortran-mode-map ";" 'fortran-abbrev-start)
- (define-key fortran-mode-map "\C-c;" 'fortran-comment-region)
- (define-key fortran-mode-map "\e\C-a" 'beginning-of-fortran-subprogram)
- (define-key fortran-mode-map "\e\C-e" 'end-of-fortran-subprogram)
- (define-key fortran-mode-map "\e;" 'fortran-indent-comment)
- (define-key fortran-mode-map "\e\C-h" 'mark-fortran-subprogram)
- (define-key fortran-mode-map "\e\n" 'fortran-split-line)
- (define-key fortran-mode-map "\n" 'fortran-reindent-then-newline-and-indent)
- (define-key fortran-mode-map "\e\C-q" 'fortran-indent-subprogram)
- (define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create-momentarily)
- (define-key fortran-mode-map "\C-c\C-r" 'fortran-column-ruler)
- (define-key fortran-mode-map "\C-c\C-p" 'fortran-previous-statement)
- (define-key fortran-mode-map "\C-c\C-n" 'fortran-next-statement)
- (define-key fortran-mode-map "\t" 'fortran-indent-line)
- (define-key fortran-mode-map "0" 'fortran-electric-line-number)
- (define-key fortran-mode-map "1" 'fortran-electric-line-number)
- (define-key fortran-mode-map "2" 'fortran-electric-line-number)
- (define-key fortran-mode-map "3" 'fortran-electric-line-number)
- (define-key fortran-mode-map "4" 'fortran-electric-line-number)
- (define-key fortran-mode-map "5" 'fortran-electric-line-number)
- (define-key fortran-mode-map "6" 'fortran-electric-line-number)
- (define-key fortran-mode-map "7" 'fortran-electric-line-number)
- (define-key fortran-mode-map "8" 'fortran-electric-line-number)
- (define-key fortran-mode-map "9" 'fortran-electric-line-number))
-
- (defvar fortran-mode-abbrev-table nil)
- (if fortran-mode-abbrev-table
- ()
- (let ((ac abbrevs-changed))
- (define-abbrev-table 'fortran-mode-abbrev-table ())
- (define-abbrev fortran-mode-abbrev-table ";au" "automatic" nil)
- (define-abbrev fortran-mode-abbrev-table ";b" "byte" nil)
- (define-abbrev fortran-mode-abbrev-table ";bD" "block data" nil)
- (define-abbrev fortran-mode-abbrev-table ";ch" "character" nil)
- (define-abbrev fortran-mode-abbrev-table ";cl" "close" nil)
- (define-abbrev fortran-mode-abbrev-table ";c" "continue" nil)
- (define-abbrev fortran-mode-abbrev-table ";cm" "common" nil)
- (define-abbrev fortran-mode-abbrev-table ";cx" "complex" nil)
- (define-abbrev fortran-mode-abbrev-table ";df" "define" nil)
- (define-abbrev fortran-mode-abbrev-table ";di" "dimension" nil)
- (define-abbrev fortran-mode-abbrev-table ";do" "double" nil)
- (define-abbrev fortran-mode-abbrev-table ";dc" "double complex" nil)
- (define-abbrev fortran-mode-abbrev-table ";dp" "double precision" nil)
- (define-abbrev fortran-mode-abbrev-table ";dw" "do while" nil)
- (define-abbrev fortran-mode-abbrev-table ";e" "else" nil)
- (define-abbrev fortran-mode-abbrev-table ";ed" "enddo" nil)
- (define-abbrev fortran-mode-abbrev-table ";el" "elseif" nil)
- (define-abbrev fortran-mode-abbrev-table ";en" "endif" nil)
- (define-abbrev fortran-mode-abbrev-table ";eq" "equivalence" nil)
- (define-abbrev fortran-mode-abbrev-table ";eW" "endwhere" nil)
- (define-abbrev fortran-mode-abbrev-table ";ex" "external" nil)
- (define-abbrev fortran-mode-abbrev-table ";ey" "entry" nil)
- (define-abbrev fortran-mode-abbrev-table ";f" "format" nil)
- (define-abbrev fortran-mode-abbrev-table ";fa" ".false." nil)
- (define-abbrev fortran-mode-abbrev-table ";fu" "function" nil)
- (define-abbrev fortran-mode-abbrev-table ";g" "goto" nil)
- (define-abbrev fortran-mode-abbrev-table ";im" "implicit" nil)
- (define-abbrev fortran-mode-abbrev-table ";ib" "implicit byte" nil)
- (define-abbrev fortran-mode-abbrev-table ";ic" "implicit complex" nil)
- (define-abbrev fortran-mode-abbrev-table ";ich" "implicit character" nil)
- (define-abbrev fortran-mode-abbrev-table ";ii" "implicit integer" nil)
- (define-abbrev fortran-mode-abbrev-table ";il" "implicit logical" nil)
- (define-abbrev fortran-mode-abbrev-table ";ir" "implicit real" nil)
- (define-abbrev fortran-mode-abbrev-table ";inc" "include" nil)
- (define-abbrev fortran-mode-abbrev-table ";in" "integer" nil)
- (define-abbrev fortran-mode-abbrev-table ";intr" "intrinsic" nil)
- (define-abbrev fortran-mode-abbrev-table ";l" "logical" nil)
- (define-abbrev fortran-mode-abbrev-table ";n" "namelist" nil)
- (define-abbrev fortran-mode-abbrev-table ";o" "open" nil) ; was ;op
- (define-abbrev fortran-mode-abbrev-table ";pa" "parameter" nil)
- (define-abbrev fortran-mode-abbrev-table ";pr" "program" nil)
- (define-abbrev fortran-mode-abbrev-table ";ps" "pause" nil)
- (define-abbrev fortran-mode-abbrev-table ";p" "print" nil)
- (define-abbrev fortran-mode-abbrev-table ";rc" "record" nil)
- (define-abbrev fortran-mode-abbrev-table ";re" "real" nil)
- (define-abbrev fortran-mode-abbrev-table ";r" "read" nil)
- (define-abbrev fortran-mode-abbrev-table ";rt" "return" nil)
- (define-abbrev fortran-mode-abbrev-table ";rw" "rewind" nil)
- (define-abbrev fortran-mode-abbrev-table ";s" "stop" nil)
- (define-abbrev fortran-mode-abbrev-table ";sa" "save" nil)
- (define-abbrev fortran-mode-abbrev-table ";st" "structure" nil)
- (define-abbrev fortran-mode-abbrev-table ";sc" "static" nil)
- (define-abbrev fortran-mode-abbrev-table ";su" "subroutine" nil)
- (define-abbrev fortran-mode-abbrev-table ";tr" ".true." nil)
- (define-abbrev fortran-mode-abbrev-table ";ty" "type" nil)
- (define-abbrev fortran-mode-abbrev-table ";vo" "volatile" nil)
- (define-abbrev fortran-mode-abbrev-table ";w" "write" nil)
- (define-abbrev fortran-mode-abbrev-table ";wh" "where" nil)
- (setq abbrevs-changed ac)))
-
- ;;;###autoload
- (defun fortran-mode ()
- "Major mode for editing fortran code.
- Tab indents the current fortran line correctly.
- `do' statements must not share a common `continue'.
-
- Type `;?' or `;\\[help-command]' to display a list of built-in\
- abbrevs for Fortran keywords.
-
- Key definitions:
- \\{fortran-mode-map}
-
- Variables controlling indentation style and extra features:
-
- comment-start
- Normally nil in Fortran mode. If you want to use comments
- starting with `!', set this to the string \"!\".
- fortran-do-indent
- Extra indentation within do blocks. (default 3)
- fortran-if-indent
- Extra indentation within if blocks. (default 3)
- fortran-structure-indent
- Extra indentation within structure, union and map blocks. (default 3)
- fortran-continuation-indent
- Extra indentation applied to continuation statements. (default 5)
- fortran-comment-line-column
- Amount of extra indentation for text within full-line comments. (default 0)
- fortran-comment-indent-style
- nil means don't change indentation of text in full-line comments,
- fixed means indent that text at fortran-comment-line-column beyond
- the value of fortran-minimum-statement-indent,
- relative means indent at fortran-comment-line-column beyond the
- indentation for a line of code.
- (default 'fixed)
- fortran-comment-indent-char
- Single-character string be inserted instead of space for
- full-line comment indentation. (default \" \")
- fortran-minimum-statement-indent
- Minimum indentation for fortran statements. (default 6)
- fortran-line-number-indent
- Maximum indentation for line numbers. A line number will get
- less than this much indentation if necessary to avoid reaching
- column 5. (default 1)
- fortran-check-all-num-for-matching-do
- Non-nil causes all numbered lines to be treated as possible 'continue'
- statements. (default nil)
- fortran-blink-matching-if
- From a fortran `endif' statement, blink the matching `if' statement.
- (default nil)
- fortran-continuation-string
- Single-character string to be inserted in column 5 of a continuation
- line. (default \"$\")
- fortran-comment-region
- String inserted by \\[fortran-comment-region] at start of each line in
- region. (default \"c$$$\")
- fortran-electric-line-number
- Non-nil causes line number digits to be moved to the correct column
- as typed. (default t)
- fortran-break-before-delimiters
- Non-nil causes fortran-do-auto-fill breaks lines before delimeters.
- (default t)
- fortran-startup-message
- Set to nil to inhibit message first time Fortran mode is used.
-
- Turning on Fortran mode calls the value of the variable fortran-mode-hook
- with no args, if that value is non-nil."
- (interactive)
- (kill-all-local-variables)
- (if fortran-startup-message
- (message "Emacs Fortran mode %s. Bugs to %s"
- fortran-mode-version bug-fortran-mode))
- (setq fortran-startup-message nil)
- (setq local-abbrev-table fortran-mode-abbrev-table)
- (set-syntax-table fortran-mode-syntax-table)
- (make-local-variable 'fortran-break-before-delimiters)
- (setq fortran-break-before-delimiters t)
- (make-local-variable 'indent-line-function)
- (setq indent-line-function 'fortran-indent-line)
- (make-local-variable 'comment-indent-hook)
- (setq comment-indent-hook 'fortran-comment-hook)
- (make-local-variable 'comment-line-start-skip)
- (setq comment-line-start-skip
- "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
- (make-local-variable 'comment-line-start)
- (setq comment-line-start "c")
- (make-local-variable 'comment-start-skip)
- (setq comment-start-skip "![ \t]*")
- (make-local-variable 'comment-start)
- (setq comment-start nil)
- (make-local-variable 'require-final-newline)
- (setq require-final-newline t)
- (make-local-variable 'abbrev-all-caps)
- (setq abbrev-all-caps t)
- (make-local-variable 'indent-tabs-mode)
- (setq indent-tabs-mode nil)
- (setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
- (setq fill-column 72) ; Already local?
- (use-local-map fortran-mode-map)
- (setq mode-name "Fortran")
- (setq major-mode 'fortran-mode)
- (make-local-variable 'fortran-tab-mode)
- (make-local-variable 'fortran-comment-line-column)
- (make-local-variable 'fortran-minimum-statement-indent)
- (make-local-variable 'fortran-column-ruler)
- (make-local-variable 'fortran-tab-mode-string)
- (fortran-tab-mode (fortran-analyze-file-format))
- (run-hooks 'fortran-mode-hook))
-
- (defun fortran-comment-hook ()
- (save-excursion
- (skip-chars-backward " \t")
- (max (+ 1 (current-column))
- comment-column)))
-
- (defun fortran-indent-comment ()
- "Align or create comment on current line.
- Existing comments of all types are recognized and aligned.
- If the line has no comment, a side-by-side comment is inserted and aligned
- if the value of comment-start is not nil.
- Otherwise, a separate-line comment is inserted, on this line
- or on a new line inserted before this line if this line is not blank."
- (interactive)
- (beginning-of-line)
- ;; Recognize existing comments of either kind.
- (cond ((looking-at comment-line-start-skip)
- (fortran-indent-line))
- ((find-comment-start-skip) ; this catches any inline comment and
- ; leaves point after comment-start-skip
- (if comment-start-skip
- (progn (goto-char (match-beginning 0))
- (if (not (= (current-column) (fortran-comment-hook)))
- (progn (delete-horizontal-space)
- (indent-to (fortran-comment-hook)))))
- (end-of-line))) ; otherwise goto end of line or sth else?
- ;; No existing comment.
- ;; If side-by-side comments are defined, insert one,
- ;; unless line is now blank.
- ((and comment-start (not (looking-at "^[ \t]*$")))
- (end-of-line)
- (delete-horizontal-space)
- (indent-to (fortran-comment-hook))
- (insert comment-start))
- ;; Else insert separate-line comment, making a new line if nec.
- (t
- (if (looking-at "^[ \t]*$")
- (delete-horizontal-space)
- (beginning-of-line)
- (insert "\n")
- (forward-char -1))
- (insert comment-line-start)
- (insert-char (if (stringp fortran-comment-indent-char)
- (aref fortran-comment-indent-char 0)
- fortran-comment-indent-char)
- (- (calculate-fortran-indent) (current-column))))))
-
- (defun fortran-comment-region (beg-region end-region arg)
- "Comments every line in the region.
- Puts fortran-comment-region at the beginning of every line in the region.
- BEG-REGION and END-REGION are args which specify the region boundaries.
- With non-nil ARG, uncomments the region."
- (interactive "*r\nP")
- (let ((end-region-mark (make-marker)) (save-point (point-marker)))
- (set-marker end-region-mark end-region)
- (goto-char beg-region)
- (beginning-of-line)
- (if (not arg) ;comment the region
- (progn (insert fortran-comment-region)
- (while (and (= (forward-line 1) 0)
- (< (point) end-region-mark))
- (insert fortran-comment-region)))
- (let ((com (regexp-quote fortran-comment-region))) ;uncomment the region
- (if (looking-at com)
- (delete-region (point) (match-end 0)))
- (while (and (= (forward-line 1) 0)
- (< (point) end-region-mark))
- (if (looking-at com)
- (delete-region (point) (match-end 0))))))
- (goto-char save-point)
- (set-marker end-region-mark nil)
- (set-marker save-point nil)))
-
- (defun fortran-abbrev-start ()
- "Typing \";\\[help-command]\" or \";?\" lists all the fortran abbrevs.
- Any other key combination is executed normally."
- (interactive)
- (let (c)
- (insert last-command-char)
- (if (or (= (setq c (read-char)) ??) ;insert char if not equal to `?'
- (= c help-char))
- (fortran-abbrev-help)
- (setq unread-command-char c))))
-
- (defun fortran-abbrev-help ()
- "List the currently defined abbrevs in Fortran mode."
- (interactive)
- (message "Listing abbrev table...")
- (require 'abbrevlist)
- (list-one-abbrev-table fortran-mode-abbrev-table "*Help*")
- (message "Listing abbrev table...done"))
-
- (defun fortran-column-ruler ()
- "Inserts a column ruler momentarily above current line, till next keystroke.
- The ruler is defined by the value of fortran-column-ruler.
- The key typed is executed unless it is SPC."
- (interactive)
- (momentary-string-display
- fortran-column-ruler (save-excursion
- (beginning-of-line)
- (if (eq (window-start (selected-window))
- (window-point (selected-window)))
- (progn (forward-line) (point))
- (point)))
- nil "Type SPC or any command to erase ruler."))
-
- (defun fortran-window-create ()
- "Makes the window 72 columns wide.
- See also fortran-window-create-momentarily."
- (interactive)
- (condition-case error
- (progn
- (let ((window-min-width 2))
- (if (< (window-width) (screen-width))
- (enlarge-window-horizontally (- (screen-width)
- (window-width) 1)))
- (split-window-horizontally 73)
- (other-window 1)
- (switch-to-buffer " fortran-window-extra" t)
- (select-window (previous-window))))
- (error (message "No room for fortran window.")
- 'error)))
-
- (defun fortran-window-create-momentarily (&optional arg)
- "Momentarily makes the window 72 columns wide.
- Optional ARG non-nil and non-unity disables the momentary feature.
- See also fortran-window-create."
- (interactive "p")
- (if (or (not arg)
- (= arg 1))
- (save-window-excursion
- (if (not (equal (fortran-window-create) 'error))
- (progn (message "Type SPC to continue editing.")
- (let ((char (read-char)))
- (or (equal char (string-to-char " "))
- (setq unread-command-char char))))))
- (fortran-window-create)))
-
- (defun fortran-split-line ()
- "Break line at point and insert continuation marker and alignment."
- (interactive)
- (delete-horizontal-space)
- (if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip))
- (insert "\n" comment-line-start " ")
- (if fortran-tab-mode
- (progn
- (insert "\n\t")
- (insert-char (fortran-numerical-continuation-char) 1))
- (insert "\n " fortran-continuation-string)));Space after \n important
- (fortran-indent-line)) ;when the cont string is C, c or *.
-
- (defun fortran-numerical-continuation-char ()
- "Return a digit for tab-digit style of continution lines.
- If, previous line is a tab-digit continuation line, returns that digit
- plus one. Otherwise return 1. Zero not allowed."
- (save-excursion
- (forward-line -1)
- (if (looking-at "\t[1-9]")
- (+ ?1 (% (- (char-after (+ (point) 1)) ?0) 9))
- ?1)))
-
- (defun delete-horizontal-regexp (chars)
- "Delete all characters in CHARS around point.
- CHARS is like the inside of a [...] in a regular expression
- except that ] is never special and \ quotes ^, - or \."
- (interactive "*s")
- (skip-chars-backward chars)
- (delete-region (point) (progn (skip-chars-forward chars) (point))))
-
- (defun fortran-electric-line-number (arg)
- "Self insert, but if part of a Fortran line number indent it automatically.
- Auto-indent does not happen if a numeric arg is used."
- ;;The use of arg may be superfluous here since there apears to be no way to
- ;;prefix a digit key with an argument.
- (interactive "P")
- (if (or arg (not fortran-electric-line-number))
- (if arg
- (self-insert-command (prefix-numeric-value arg))
- (self-insert-command 1))
- (if (or (and (= 5 (current-column))
- (save-excursion
- (beginning-of-line)
- (looking-at " ")));In col 5 with only spaces to left.
- (and (= fortran-minimum-statement-indent (current-column))
- (save-excursion
- (beginning-of-line)
- (looking-at "\t"));In col 8 with a single tab to the left.
- (not (or (eq last-command 'fortran-indent-line)
- (eq last-command
- 'fortran-reindent-then-newline-and-indent))))
- (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
- )
- (self-insert-command (prefix-numeric-value arg))
- (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
- (and
- (not (looking-at comment-line-start-skip))
- (or (looking-at
- (concat "[ \t]*" (regexp-quote fortran-continuation-string)))
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")))))
- (while (and (setq not-first-statement (= (forward-line -1) 0))
- (or (looking-at comment-line-start-skip)
- (looking-at "[ \t]*$")
- (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")
- (looking-at (concat "[ \t]*" comment-start-skip)))))
- (cond ((and continue-test
- (not not-first-statement))
- (message "Incomplete continuation statement."))
- (continue-test
- (fortran-previous-statement))
- ((not not-first-statement)
- 'first-statement))))
-
- (defun fortran-next-statement ()
- "Moves point to beginning of the next fortran statement.
- Returns `last-statement' if that statement is the last
- non-comment Fortran statement in the file, and nil otherwise."
- (interactive)
- (let (not-last-statement)
- (beginning-of-line)
- (while (and (setq not-last-statement
- (and (= (forward-line 1) 0)
- (not (eobp))))
- (or (looking-at comment-line-start-skip)
- (looking-at "[ \t]*$")
- (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")
- (looking-at (concat "[ \t]*" comment-start-skip)))))
- (if (not not-last-statement)
- 'last-statement)))
-
- (defun fortran-blink-matching-if ()
- "From a fortran `endif' statement, blink the matching `if' statement."
- (let ((count 1) (top-of-window (window-start)) matching-if
- (endif-point (point)) message)
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*if\\b"))
- (progn
- (save-excursion
- (while (and (not (= count 0))
- (not (eq (fortran-previous-statement)
- 'first-statement))
- (not (looking-at
- "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
- ; Keep local to subprogram
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "if[ \t]*(")
- (save-excursion
- (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
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq
- then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test))
- (setq count (- count 1)))))
- ((looking-at "end[ \t]*if\\b")
- (setq count (+ count 1)))))
- (if (not (= count 0))
- (setq message "No matching if.")
- (if (< (point) top-of-window)
- (setq message (concat "Matches " (buffer-substring
- (progn (beginning-of-line)
- (point))
- (progn (end-of-line)
- (point)))))
- (setq matching-if (point)))))
- (if message
- (message "%s" message)
- (goto-char matching-if)
- (sit-for 1)
- (goto-char endif-point))))))
-
- (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 (and (not (looking-at comment-line-start-skip))
- (find-comment-start-skip))
- (fortran-indent-comment))))
- ;; Never leave point in left margin.
- (if (< (current-column) cfi)
- (move-to-column cfi))
- (if (and auto-fill-hook
- (> (save-excursion (end-of-line) (current-column)) fill-column))
- (save-excursion
- (end-of-line)
- (fortran-do-auto-fill)))
- (if fortran-blink-matching-if
- (fortran-blink-matching-if))))
-
- (defun fortran-reindent-then-newline-and-indent ()
- "Reindent the current fortran line, insert a newline and indent the newline.
- An abbrev before point is expanded if abbrev-mode is non-nil."
- (interactive)
- (if abbrev-mode (expand-abbrev))
- (save-excursion
- (beginning-of-line)
- (skip-chars-forward " \t")
- (if (or (looking-at "[0-9]") ;Reindent only where it is most
- (looking-at "end") ;likely to be necessary
- (looking-at "else")
- (looking-at (regexp-quote fortran-continuation-string)))
- (fortran-indent-line)))
- (newline)
- (fortran-indent-line))
-
- (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)
- (fortran-minimum-statement-indent
- fortran-minimum-statement-indent))
- (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_$(=a-z0-9]")
- (let (then-test) ;multi-line if-then
- (while (and (= (forward-line 1) 0)
- ;;search forward for then
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not (setq then-test (looking-at
- ".*then\\b[ \t]\
- *[^ \t_$(=a-z0-9]")))))
- then-test))
- (setq icol (+ icol fortran-if-indent))))
- ((looking-at "\\(else\\|elseif\\)\\b")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "where.*(.*)[ \t]*\n")
- (setq icol (+ icol fortran-if-indent)))
- ((looking-at "do\\b")
- (setq icol (+ icol fortran-do-indent)))
- ((looking-at
- "\\(structure\\|union\\|map\\)\\b[ \t]*[^ \t=(a-z]")
- (setq icol (+ icol fortran-structure-indent)))
- ((looking-at "end\\b[ \t]*[^ \t=(a-z]")
- ;; Previous END resets indent to minimum
- (setq icol fortran-minimum-statement-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-minimum-statement-indent
- fortran-comment-line-column))))
- (setq fortran-minimum-statement-indent 0))
- ((or (looking-at (concat "[ \t]*"
- (regexp-quote
- fortran-continuation-string)))
- (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (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)))
- ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
- (setq icol (- icol fortran-if-indent)))
- ((looking-at "end[ \t]*where\\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)))
- ((looking-at
- "end[ \t]*\
- \\(structure\\|union\\|map\\)\\b[ \t]*[^ \t=(a-z]")
- (setq icol (- icol fortran-structure-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 5/8 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))))
- ((or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (goto-char (match-end 0)))
- (t
- ;; Move past line number.
- (skip-chars-forward "[ \t0-9]");From Uli
- ))
- ;; 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-string 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.
- 4) A tab followed by a digit indicates a continuation 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 "\t[1-9]")
- (if fortran-tab-mode
- (goto-char (match-end 0))
- (delete-char 2)
- (insert " ")
- (insert fortran-continuation-string))
- (if (looking-at " [^ 0\n]")
- (if fortran-tab-mode
- (progn (delete-char 6)
- (insert "\t")
- (insert-char (fortran-numerical-continuation-char) 1))
- (forward-char 6))
- (delete-horizontal-space)
- ;; Put line number in columns 0-4
- ;; or put continuation character in column 5.
- (cond ((eobp))
- ((looking-at (regexp-quote fortran-continuation-string))
- (if fortran-tab-mode
- (progn
- (indent-to fortran-minimum-statement-indent)
- (delete-char 1)
- (insert-char (fortran-numerical-continuation-char) 1))
- (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 (and comment-start-skip
- (find-comment-start-skip))
- (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 indented.
- 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.
- Otherwise return a nil."
- (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))))))))
-
- (defun fortran-analyze-file-format ()
- "Return 0 if Fixed format is used, 1 if Tab formatting is used.
- Use fortran-tab-mode-default if no non-comment statements are found in the
- file before the end or the first fortran-analyze-depth lines."
- (save-excursion
- (goto-char (point-min))
- (setq i 0)
- (while (not (or
- (eobp)
- (looking-at "\t")
- (looking-at " ")
- (> i fortran-analyze-depth)))
- (forward-line)
- (setq i (1+ i)))
- (cond
- ((looking-at "\t") 1)
- ((looking-at " ") 0)
- (fortran-tab-mode-default 1)
- (t 0))))
-
- (defun fortran-tab-mode (arg)
- "Toggle fortran-tab-mode which indicates style of continuation lines.
- With no argument, toggle on/off the tabbing mode of continuation lines.
- If argument is a positive number, or non-nil if not a number, fortran-tab-mode
- is turned on. Otherwise
- If `fortran-tab-mode' is false"
- (interactive "P")
- (setq fortran-tab-mode
- (if (null arg) (not fortran-tab-mode)
- (if (numberp arg)
- (> (prefix-numeric-value arg) 0)
- (arg))))
- (if fortran-tab-mode
- (fortran-setup-tab-format-style)
- (fortran-setup-fixed-format-style))
- (set-buffer-modified-p (buffer-modified-p))) ;No-op, but updates mode line.
-
- (defun fortran-setup-tab-format-style ()
- "Set up fortran mode to use the TAB-digit mode of continuation lines.
- Use the command \\[fortran-tab-mode] to toggle between this and fixed
- format style."
- (setq fortran-minimum-statement-indent (max tab-width 6))
- (setq indent-tabs-mode t)
- (setq fortran-column-ruler
- (concat
- "0 810 20 30 40 5\
- 0 60 70\n"
- "[ ]| { | | | | | | | | \
- | | | | |}\n"))
- (setq fortran-tab-mode-string " TAB-format")
- (set-buffer-modified-p (buffer-modified-p)))
-
- (defun fortran-setup-fixed-format-style ()
- "Set up fortran mode to use the column 6 mode of continuation lines.
- Use the command \\[fortran-tab-mode] to toggle between this and tab
- character format style."
- (setq fortran-minimum-statement-indent 6)
- (setq indent-tabs-mode nil)
- (setq fortran-column-ruler
- (concat
- "0 4 6 10 20 30 40 5\
- 0 60 70\n"
- "[ ]|{ | | | | | | | | \
- | | | | |}\n"))
- (setq fortran-tab-mode-string " Fixed-format")
- (set-buffer-modified-p (buffer-modified-p)))
-
- (or (assq 'fortran-tab-mode-string minor-mode-alist)
- (setq minor-mode-alist (cons
- '(fortran-tab-mode-string fortran-tab-mode-string)
- minor-mode-alist)))
-
- (defun find-comment-start-skip ()
- "Move to past `comment-start-skip' found on current line.
- Return t if `comment-start-skip' found, nil if not."
- ;;; In order to move point only if comment-start-skip is found,
- ;;; this one uses a lot of save-excursions. Note that re-search-forward
- ;;; moves point even if comment-start-skip is inside a string-constant.
- ;;; Some code expects certain values for match-beginning and end
- (interactive)
- (let ((save-match-beginning) (save-match-end))
- (if (save-excursion
- (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t))
- (progn
- (setq save-match-beginning (match-beginning 0))
- (setq save-match-end (match-end 0))
- (if (is-in-fortran-string-p (match-beginning 0))
- (progn
- (save-excursion
- (goto-char save-match-end)
- (find-comment-start-skip)) ; recurse for rest of line
- )
- (goto-char save-match-beginning)
- (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t)
- (goto-char (match-end 0))
- t))
- nil)))
-
- (defun is-in-fortran-string-p (pos)
- "t if POS (a buffer position) is inside a standard Fortran string.
- Fortran strings are delimeted by apostrophes (\'). Quote-Escape-sequences
- (\\'), strings delimited by \" and detection of syntax-errors
- (unbalanced quotes) are NOT supported."
- ;;; The algorithm is simple: start at point with value nil
- ;;; and toggle value at each quote found until end of line.
- ;;; The quote skip is hard-coded, maybe it's possible to change this
- ;;; and use something like 'string-constant-delimiter' (which
- ;;; doesn't exist yet) so this function can be used by other modes,
- ;;; but then one must pay attention to escape sequences, multi-line-constants
- ;;; and such things.
- (let ((is-in-fortran-string nil))
- (save-excursion
- (goto-char pos)
- (fortran-previous-statement)
- (fortran-next-statement)
- (while (< (point) pos)
- ;; Make sure we don't count quotes in continuation column.
- (if (looking-at "^ ")
- (goto-char (+ 1 (match-end 0)))
- (if (and (not is-in-fortran-string)
- (looking-at comment-start-skip))
- (beginning-of-line 2)
- (if (looking-at "'")
- (setq is-in-fortran-string (not is-in-fortran-string)))
- (forward-char 1)))))
- is-in-fortran-string))
-
- (defun fortran-auto-fill-mode (arg)
- "Toggle fortran-auto-fill mode.
- With arg, turn fortran-auto-fill mode on iff arg is positive.
- In fortran-auto-fill mode, inserting a space at a column beyond fill-column
- automatically breaks the line at a previous space."
- (interactive "P")
- (prog1 (setq auto-fill-hook
- (if (if (null arg)
- (not auto-fill-hook)
- (> (prefix-numeric-value arg) 0))
- 'fortran-indent-line
- nil))
- ;; update mode-line
- (set-buffer-modified-p (buffer-modified-p))))
-
- (defun fortran-do-auto-fill ()
- (interactive)
- (let* ((opoint (point))
- (bol (save-excursion (beginning-of-line) (point)))
- (eol (save-excursion (end-of-line) (point)))
- (bos (min eol (+ bol (fortran-current-line-indentation))))
- (quote
- (save-excursion
- (goto-char bol)
- (if (looking-at comment-line-start-skip)
- nil ; OK to break quotes on comment lines.
- (move-to-column fill-column)
- (cond ((is-in-fortran-string-p (point))
- (save-excursion (re-search-backward "[^']'[^']" bol t)
- (if fortran-break-before-delimiters
- (point)
- (1+ (point)))))
- (t nil)))))
- ;;
- ;; decide where to split the line. If a position for a quoted
- ;; string was found above then use that, else break the line
- ;; before the last delimiter.
- ;; Delimeters are whitespace, commas, and operators.
- ;; Will break before a pair of *'s.
- ;;
- (fill-point
- (or quote
- (save-excursion
- (move-to-column (1+ fill-column))
- (skip-chars-backward "^ \t\n,'+-/*)=")
- (if (<= (point) (1+ bos))
- (progn
- (move-to-column (1+ fill-column))
- (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t))
- (goto-char bol))))
- (if (bolp)
- (re-search-forward "[ \t]" opoint t)
- (forward-char -1)
- (if (looking-at "'")
- (forward-char 1)
- (skip-chars-backward " \t\*")))
- (if fortran-break-before-delimiters
- (point)
- (1+ (point))))))
- )
- ;; if we are in an in-line comment, don't break unless the
- ;; line of code is longer than it should be. Otherwise
- ;; break the line at the column computed above.
- ;;
- ;; Need to use find-comment-start-skip to make sure that quoted !'s
- ;; don't prevent a break.
- (if (not (or (save-excursion
- (if (and (re-search-backward comment-start-skip bol t)
- (not (is-in-fortran-string-p (point))))
- (progn
- (skip-chars-backward " \t")
- (< (current-column) (1+ fill-column)))))
- (save-excursion
- (goto-char fill-point)
- (bolp))))
- (if (> (save-excursion
- (goto-char fill-point) (current-column))
- (1+ fill-column))
- (progn (goto-char fill-point)
- (fortran-break-line))
- (save-excursion
- (if (> (save-excursion
- (goto-char fill-point)
- (current-column))
- (+ (calculate-fortran-indent) fortran-continuation-indent))
- (progn
- (goto-char fill-point)
- (fortran-break-line))))))
- ))
- (defun fortran-break-line ()
- (let ((opoint (point))
- (bol (save-excursion (beginning-of-line) (point)))
- (eol (save-excursion (end-of-line) (point)))
- (comment-string nil))
-
- (save-excursion
- (if (and comment-start-skip (find-comment-start-skip))
- (progn
- (re-search-backward comment-start-skip bol t)
- (setq comment-string (buffer-substring (point) eol))
- (delete-region (point) eol))))
- ;;; Forward line 1 really needs to go to next non white line
- (if (save-excursion (forward-line 1)
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]")))
- (progn
- (forward-line 1)
- (delete-indentation)
- (delete-char 2)
- (delete-horizontal-space)
- (fortran-do-auto-fill))
- (fortran-split-line))
- (if comment-string
- (save-excursion
- (goto-char bol)
- (end-of-line)
- (delete-horizontal-space)
- (indent-to (fortran-comment-hook))
- (insert comment-string)))))
-
- (provide 'fortran)
-
- ;;; fortran.el ends here
-