-;;; fortran.el --- Fortran mode for GNU Emacs (version 1.28.3, July 15, 1991)
-
-;;; Copyright (c) 1991 Free Software Foundation, Inc.
-;;; Written by Michael D. Prange (prange@erl.mit.edu)
-;;; Maintained (as of version 1.28) by Stephen A. Wood (saw@hallc1.cebaf.gov)
-;;; This version is an update of version 1.21 (Oct 1, 1985).
-;;; Updated by Stephen A. Wood (saw@hallc1.cebaf.gov) to use tab format
-;;; continuation control and indentation. (Digit after TAB to signify
-;;; continuation line. This version also incorporates suggestions from
-;;; Richard Stallman, and the ideas in two previous unpublished versions of
-;;; fortran .el (version 1.21.1 (from gildea@expo.lcs.mit.edu) and 1.27
-;;; (prange@erl.mit.edu).)
-
-;;; 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.
+;;; fortran.el --- Fortran mode for GNU Emacs
+
+;; Copyright (c) 1986, 93, 94, 95, 97, 98, 1999 Free Software Foundation, Inc.
+
+;; Author: Michael D. Prange <prange@erl.mit.edu>
+;; Maintainer: Dave Love <fx@gnu.org>
+;; 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 1, or (at your option)
+;; 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,
;; 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.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; This mode is documented in the Emacs manual.
+;;
+;; Note that it is for editing Fortran77 or Fortran90 fixed source
+;; form. For editing Fortran 90 free format source, use `f90-mode'
+;; (f90.el).
+
+;;; History:
+
+;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
+
+;; We acknowledge 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.
+
+;;; Code:
+
+;; Todo:
-;;; Author acknowledges help from Stephen Gildea <gildea@erl.mit.edu>
+;; * Tidy it all up! (including renaming non-`fortran' prefixed
+;; functions).
+;; * Implement insertion and removal of statement continuations in
+;; mixed f77/f90 style, with the first `&' past column 72 and the
+;; second in column 6.
+;; * Support any other extensions to f77 grokked by GNU Fortran.
+;; * Change fontification to use font-lock-syntactic-keywords for
+;; fixed-form comments. (Done, but doesn't work properly with
+;; lazy-lock in pre-20.4.)
+
+(require 'easymenu)
+
+(defgroup fortran nil
+ "Fortran mode for Emacs"
+ :link '(custom-manual "(emacs)Fortran")
+ :group 'languages)
+
+(defgroup fortran-indent nil
+ "Indentation variables in Fortran mode"
+ :prefix "fortran-"
+ :group 'fortran)
+
+(defgroup fortran-comment nil
+ "Comment-handling variables in Fortran mode"
+ :prefix "fortran-"
+ :group 'fortran)
-;;; Bugs to bug-fortran-mode@erl.mit.edu
;;;###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.")
+(defcustom fortran-tab-mode-default nil
+ "*Default tabbing/carriage control style for empty files in Fortran mode.
+A value of t specifies tab-digit style of continuation control.
+A value of nil specifies that continuation lines are marked
+with a character in column 6."
+ :type 'boolean
+ :group 'fortran-indent)
-(defvar fortran-do-indent 3
- "*Extra indentation applied to `do' blocks.")
+;; Buffer local, used to display mode line.
+(defcustom fortran-tab-mode-string nil
+ "String to appear in mode line when TAB format mode is on."
+ :type '(choice (const nil) string)
+ :group 'fortran-indent)
+(make-variable-buffer-local 'fortran-tab-mode-string)
-(defvar fortran-if-indent 3
- "*Extra indentation applied to `if' blocks.")
+(defcustom fortran-do-indent 3
+ "*Extra indentation applied to DO blocks."
+ :type 'integer
+ :group 'fortran-indent)
-(defvar fortran-continuation-indent 5
- "*Extra indentation applied to `continuation' lines.")
+(defcustom fortran-if-indent 3
+ "*Extra indentation applied to IF blocks."
+ :type 'integer
+ :group 'fortran-indent)
-(defvar fortran-comment-indent-style 'fixed
- "*nil forces comment lines not to be touched,
-'fixed produces fixed comment indentation to comment-column,
-and 'relative indents to current fortran indentation plus comment-column.")
+(defcustom fortran-structure-indent 3
+ "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
+ :type 'integer
+ :group 'fortran-indent)
-(defvar fortran-comment-line-column 6
- "*Indentation for text in comment lines.")
+(defcustom fortran-continuation-indent 5
+ "*Extra indentation applied to Fortran continuation lines."
+ :type 'integer
+ :group 'fortran-indent)
-(defvar comment-line-start nil
- "*Delimiter inserted to start new full-line comment.")
+(defcustom fortran-comment-indent-style 'fixed
+ "*How to indent comments.
+nil forces comment lines not to be touched,
+'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
+columns beyond `fortran-minimum-statement-indent-fixed' (for
+`indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
+`indent-tabs-mode' of t), and 'relative indents to current
+Fortran indentation plus `fortran-comment-line-extra-indent'."
+ :type '(radio (const :tag "Untouched" nil) (const fixed) (const relative))
+ :group 'fortran-indent)
-(defvar comment-line-start-skip nil
- "*Regexp to match the start of a full-line comment.")
+(defcustom fortran-comment-line-extra-indent 0
+ "*Amount of extra indentation for text within full-line comments."
+ :type 'integer
+ :group 'fortran-indent
+ :group 'fortran-comment)
-(defvar fortran-minimum-statement-indent 6
- "*Minimum indentation for fortran statements.")
+(defcustom comment-line-start nil
+ "*Delimiter inserted to start new full-line comment."
+ :type '(choice string (const nil))
+ :group 'fortran-comment)
+
+(defcustom comment-line-start-skip nil
+ "*Regexp to match the start of a full-line comment."
+ :type '(choice string (const nil))
+ :group 'fortran-comment)
+
+(defcustom fortran-minimum-statement-indent-fixed 6
+ "*Minimum statement indentation for fixed format continuation style."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-minimum-statement-indent-tab (max tab-width 6)
+ "*Minimum statement indentation for TAB format continuation style."
+ :type 'integer
+ :group 'fortran-indent)
;; 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 " "
+(defcustom fortran-comment-indent-char " "
"*Single-character string inserted for Fortran comment indentation.
-Normally a space.")
+Normally a space."
+ :type 'string
+ :group 'fortran-comment)
-(defvar fortran-line-number-indent 1
+(defcustom fortran-line-number-indent 1
"*Maximum indentation for Fortran line numbers.
-5 means right-justify them within their five-column field.")
+5 means right-justify them within their five-column field."
+ :type 'integer
+ :group 'fortran-indent)
-(defvar fortran-check-all-num-for-matching-do nil
- "*Non-nil causes all numbered lines to be treated as possible do-loop ends.")
+(defcustom fortran-check-all-num-for-matching-do nil
+ "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
+ :type 'boolean
+ :group 'fortran)
-(defvar fortran-blink-matching-if nil
- "*From a fortran `endif' statement, blink the matching `if' statement.")
+(defcustom fortran-blink-matching-if nil
+ "*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
+Also, from an ENDDO statement blink on matching DO [WHILE] statement."
+ :type 'boolean
+ :group 'fortran)
-(defvar fortran-continuation-string "$"
- "*Single-character string used for fortran continuation lines.
+(defcustom fortran-continuation-string "$"
+ "*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$$$"
- "*String inserted by \\[fortran-comment-region]\
- at start of each line in region.")
+Normally $."
+ :type 'string
+ :group 'fortran)
-(defvar fortran-electric-line-number t
- "*Non-nil causes line number digits to be moved to the correct column as\
- typed.")
+(defcustom fortran-comment-region "c$$$"
+ "*String inserted by \\[fortran-comment-region] at start of each \
+line in region."
+ :type 'string
+ :group 'fortran-comment)
-(defvar fortran-startup-message t
- "*Non-nil displays a startup message when Fortran mode is first called.")
+(defcustom fortran-electric-line-number t
+ "*Non-nil causes line number digits to be moved to the correct \
+column as typed."
+ :type 'boolean
+ :group 'fortran)
-(defvar fortran-column-ruler " "
- "*String displayed above current line by \\[fortran-column-ruler].")
+(defvar fortran-column-ruler-fixed
+ "0 4 6 10 20 30 40 5\
+0 60 70\n\
+\[ ]|{ | | | | | | | | \
+\| | | | |}\n"
+ "String displayed above current line by \\[fortran-column-ruler].
+This variable used in fixed format mode.")
-(defconst bug-fortran-mode "bug-fortran-mode@erl.mit.edu"
- "Address of mailing list for Fortran mode bugs.")
-
-(defconst fortran-mode-version "1.28.3")
+(defvar fortran-column-ruler-tab
+ "0 810 20 30 40 5\
+0 60 70\n\
+\[ ]| { | | | | | | | | \
+\| | | | |}\n"
+ "String displayed above current line by \\[fortran-column-ruler].
+This variable used in TAB format mode.")
(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.")
+ "Number of lines to scan to determine whether to use fixed or TAB \
+format style.")
+
+(defcustom fortran-break-before-delimiters t
+ "*Non-nil causes filling to break lines before delimiters."
+ :type 'boolean
+ :group 'fortran)
(if fortran-mode-syntax-table
()
(setq fortran-mode-syntax-table (make-syntax-table))
+ ;; We might like `;' to be punctuation (g77 multi-statement lines),
+ ;; but that screws abbrevs.
(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 ?. "w" fortran-mode-syntax-table)
+ (modify-syntax-entry ?\\ "\\" fortran-mode-syntax-table)
+ ;; This might be better as punctuation, as for C, but this way you
+ ;; can treat floating-point numbers as symbols.
+ (modify-syntax-entry ?. "_" fortran-mode-syntax-table) ; e.g. `a.ne.b'
+ (modify-syntax-entry ?_ "_" fortran-mode-syntax-table)
+ (modify-syntax-entry ?$ "_" fortran-mode-syntax-table) ; esp. VMSisms
+ (modify-syntax-entry ?\! "<" fortran-mode-syntax-table)
(modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
-(defvar fortran-mode-map ()
- "Keymap used in fortran mode.")
+;; Comments are real pain in Fortran because there is no way to
+;; represent the standard comment syntax in an Emacs syntax table.
+;; (We can do so for F90-style). Therefore an unmatched quote in a
+;; standard comment will throw fontification off on the wrong track.
+;; So we do syntactic fontification with regexps.
+\f
+;; Regexps done by simon@gnu with help from Ulrik Dickow <dickow@nbi.dk> and
+;; probably others Si's forgotten about (sorry).
+
+(defconst fortran-font-lock-keywords-1 nil
+ "Subdued level highlighting for Fortran mode.")
+
+(defconst fortran-font-lock-keywords-2 nil
+ "Medium level highlighting for Fortran mode.")
+
+(defconst fortran-font-lock-keywords-3 nil
+ "Gaudy level highlighting for Fortran mode.")
+
+(defconst fortran-font-lock-syntactic-keywords nil
+ "`font-lock-syntactic-keywords' for Fortran.
+These get fixed-format comments fontified.")
+
+(let ((comment-chars "cd") ; `d' for `debugging' comments
+ (fortran-type-types
+ (eval-when-compile
+ (let ((re (regexp-opt
+ (let ((simple-types
+ '("character" "byte" "integer" "logical"
+ "none" "real" "complex"
+ "double precision" "double complex"))
+ (structured-types '("structure" "union" "map"))
+ (other-types '("record" "dimension"
+ "parameter" "common" "save"
+ "external" "intrinsic" "data"
+ "equivalence")))
+ (append
+ (mapcar (lambda (x) (concat "implicit " x))
+ simple-types)
+ simple-types
+ (mapcar (lambda (x) (concat "end " x))
+ structured-types)
+ structured-types
+ other-types)))))
+ ;; In the optimized regexp above, replace spaces by regexp
+ ;; for optional whitespace, which regexp-opt would have
+ ;; escaped.
+ (mapconcat #'identity (split-string re) "[ \t]*"))))
+ (fortran-keywords
+ (eval-when-compile
+ (regexp-opt '("continue" "format" "end" "enddo" "if" "then"
+ "else" "endif" "elseif" "while" "inquire" "stop"
+ "return" "include" "open" "close" "read" "write"
+ "format" "print" "select" "case" "cycle" "exit"))))
+ (fortran-logicals
+ (eval-when-compile
+ (regexp-opt '("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne"
+ "true" "false")))))
+
+ (setq fortran-font-lock-syntactic-keywords
+ ;; Fixed format comments. (!-style handled normally.)
+ (list
+ (list (concat "^[" comment-chars "]") 0 '(11))
+ (list (concat "^[^" comment-chars "\t\n]" (make-string 71 ?.)
+ "\\([^\n]+\\)")
+ 1 '(11))))
+
+ (setq fortran-font-lock-keywords-1
+ (list
+ ;;
+ ;; Program, subroutine and function declarations, plus calls.
+ (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
+ "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
+ '(1 font-lock-keyword-face)
+ '(2 font-lock-function-name-face nil t))))
+
+ (setq fortran-font-lock-keywords-2
+ (append fortran-font-lock-keywords-1
+ (list
+ ;;
+ ;; Fontify all type specifiers (must be first; see below).
+ (cons (concat "\\<\\(" fortran-type-types "\\)\\>")
+ 'font-lock-type-face)
+ ;;
+ ;; Fontify all builtin keywords (except logical, do
+ ;; and goto; see below).
+ (concat "\\<\\(" fortran-keywords "\\)\\>")
+ ;;
+ ;; Fontify all builtin operators.
+ (concat "\\.\\(" fortran-logicals "\\)\\.")
+ ;;
+ ;; Fontify do/goto keywords and targets, and goto tags.
+ (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
+ '(1 font-lock-keyword-face)
+ '(2 font-lock-constant-face nil t))
+ (cons "^ *\\([0-9]+\\)" 'font-lock-constant-face))))
+
+ (setq fortran-font-lock-keywords-3
+ (append
+ ;;
+ ;; The list `fortran-font-lock-keywords-1'.
+ fortran-font-lock-keywords-1
+ ;;
+ ;; Fontify all type specifiers plus their declared items.
+ (list
+ (list (concat "\\<\\(" fortran-type-types "\\)\\>[ \t(/]*\\(*\\)?")
+ ;; Fontify the type specifier.
+ '(1 font-lock-type-face)
+ ;; Fontify each declaration item (or just the /.../ block name).
+ `(font-lock-match-c-style-declaration-item-and-skip-to-next
+ ;; Start after any *(...) expression.
+ (condition-case nil
+ (and (and (match-beginning ,(+ 2 (regexp-opt-depth
+ fortran-type-types)))
+ (forward-sexp))
+ (forward-sexp))
+ (error nil))
+ ;; No need to clean up.
+ nil
+ ;; Fontify as a variable name, functions are
+ ;; fontified elsewhere.
+ (1 font-lock-variable-name-face nil t))))
+ ;;
+ ;; Things extra to `fortran-font-lock-keywords-3'
+ ;; (must be done first).
+ (list
+ ;;
+ ;; Fontify goto-like `err=label'/`end=label' in read/write
+ ;; statements.
+ '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
+ (1 font-lock-keyword-face) (4 font-lock-constant-face nil t))
+ ;;
+ ;; Highlight standard continuation character and in a
+ ;; TAB-formatted line.
+ '("^ \\([^ 0]\\)" 1 font-lock-string-face)
+ '("^\t\\([1-9]\\)" 1 font-lock-string-face))
+ ;;
+ ;; The list `fortran-font-lock-keywords-2' less that for types
+ ;; (see above).
+ (cdr (nthcdr (length fortran-font-lock-keywords-1)
+ fortran-font-lock-keywords-2)))))
+
+(defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
+ "Default expressions to highlight in Fortran mode.")
+\f
+(defvar fortran-imenu-generic-expression
+ ;; These patterns could be confused by sequence nos. in cols 72+ and
+ ;; don't allow continuations everywhere.
+ (list
+ (list
+ nil
+ ;; Lines below are: 1. leading whitespace; 2. function
+ ;; declaration with optional type, e.g. `real', `real*4',
+ ;; character(*), `double precision' and possible statement
+ ;; continuation; 3. untyped declarations; 4. the variable to
+ ;; index. [This will be fooled by `end function' allowed by G77.
+ ;; Also, it assumes sensible whitespace is employed.]
+ (concat "^\\s-+\\(\
+\\(\\sw\\|\\s-\\|[*()+]\\)*\
+\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)\
+[ \t" fortran-continuation-string "]+\
+\\(\\sw+\\)")
+ 3)
+ ;; Un-named block data
+ (list nil "^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
+ "Imenu generic expression for `imenu-default-create-index-function'.")
+
+(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 "\M-\C-a" 'beginning-of-fortran-subprogram)
+ (define-key fortran-mode-map "\M-\C-e" 'end-of-fortran-subprogram)
+ (define-key fortran-mode-map "\M-;" 'fortran-indent-comment)
+ (define-key fortran-mode-map "\M-\C-h" 'mark-fortran-subprogram)
+ (define-key fortran-mode-map "\M-\n" 'fortran-split-line)
+ (define-key fortran-mode-map "\n" 'fortran-indent-new-line)
+ (define-key fortran-mode-map "\M-\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 "\C-c\C-d" 'fortran-join-line) ; like f90
+ (define-key fortran-mode-map "\M-^" 'fortran-join-line) ; subvert delete-indentation
+ (define-key fortran-mode-map "\C-xnd" 'fortran-narrow-to-subprogram)
+ ;(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 "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))
+ (define-key fortran-mode-map "9" 'fortran-electric-line-number)
+
+ ;; Menu
+ (unless (boundp 'fortran-mode-menu)
+ (easy-menu-define
+ fortran-mode-menu fortran-mode-map ""
+ '("Fortran"
+ ["Toggle Auto-fill" fortran-auto-fill-mode :style toggle
+ :selected (eq auto-fill-function 'fortran-do-auto-fill)]
+ ["Toggle abbrev-mode" abbrev-mode :style toggle :selected abbrev-mode]
+ "----"
+ ["Comment-out Region" fortran-comment-region mark-active]
+ ["Uncomment-out region"
+ (fortran-comment-region (region-beginning) (region-end) 1)
+ mark-active]
+ ["Indent Region" indent-region mark-active]
+ ["Indent Subprogram" fortran-indent-subprogram t]
+ "----"
+ ["Beginning of Subprogram" beginning-of-fortran-subprogram t]
+ ["End of Subprogram" end-of-fortran-subprogram t]
+ ("Mark"
+ ["Subprogram" mark-fortran-subprogram t]
+ ["IF Block" fortran-mark-if t]
+ ["DO Block" fortran-mark-do t])
+ ["Narrow to Subprogram" fortran-narrow-to-subprogram t]
+ ["Widen" widen t]
+ "----"
+ ["Temporary column ruler" fortran-column-ruler t]
+ ["72-column window" fortran-window-create t]
+ ["Full Width Window"
+ (enlarge-window-horizontally (- (frame-width) (window-width)))
+ (< (window-width) (frame-width))]
+ ["Momentary 72-column window" fortran-window-create-momentarily t]
+ "----"
+ ["Break Line at Point" fortran-split-line t]
+ ["Join Line" fortran-join-line t]
+ ["Fill Statement/Comment" fill-paragraph t]
+ "----"
+ ["Add imenu menu"
+ (progn (imenu-add-menubar-index)
+ ;; Prod menu bar to update -- is this the right way?
+ (menu-bar-mode 1))
+ (not (and (boundp 'imenu--index-alist)
+ imenu--index-alist))]))))
\f
(defvar fortran-mode-abbrev-table nil)
(if fortran-mode-abbrev-table
(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 ";bl" "block data" 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 ";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 ";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)))
\f
+(eval-when-compile ; silence compiler
+ (defvar imenu-case-fold-search)
+ (defvar imenu-syntax-alist))
+
;;;###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'.
+ "Major mode for editing Fortran code.
+\\[fortran-indent-line] 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.
+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
+ `comment-start'
Normally nil in Fortran mode. If you want to use comments
starting with `!', set this to the string \"!\".
- fortran-do-indent
+ `fortran-do-indent'
Extra indentation within do blocks. (default 3)
- fortran-if-indent
+ `fortran-if-indent'
Extra indentation within if blocks. (default 3)
- fortran-continuation-indent
- Extra indentation appled to continuation statements. (default 5)
- fortran-comment-line-column
- Amount of indentation for text within full-line comments. (default 6)
- fortran-comment-indent-style
+ `fortran-structure-indent'
+ Extra indentation within structure, union, map and interface blocks.
+ (default 3)
+ `fortran-continuation-indent'
+ Extra indentation applied to continuation statements. (default 5)
+ `fortran-comment-line-extra-indent'
+ 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 column fortran-comment-line-column
- relative means indent at fortran-comment-line-column beyond the
+ fixed means indent that text at `fortran-comment-line-extra-indent' beyond
+ the value of `fortran-minimum-statement-indent-fixed' (for fixed
+ format continuation style) or `fortran-minimum-statement-indent-tab'
+ (for TAB format continuation style).
+ relative means indent at `fortran-comment-line-extra-indent' beyond the
indentation for a line of code.
(default 'fixed)
- fortran-comment-indent-char
- Single-character string be inserted instead of space for
+ `fortran-comment-indent-char'
+ Single-character string to 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
+ `fortran-minimum-statement-indent-fixed'
+ Minimum indentation for Fortran statements in fixed format mode. (def.6)
+ `fortran-minimum-statement-indent-tab'
+ Minimum indentation for Fortran statements in TAB format mode. (default 9)
+ `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'
+ `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
+ `fortran-blink-matching-if'
+ Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
+ matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
+ 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
+ `fortran-comment-region'
+ String inserted by \\[fortran-comment-region] at start of each line in
region. (default \"c$$$\")
- fortran-electric-line-number
- Non-nil causes line number digits to be moved to the correct column
+ `fortran-electric-line-number'
+ Non-nil causes line number digits to be moved to the correct column
as typed. (default t)
- fortran-startup-message
- Set to nil to inhibit message first time Fortran mode is used.
+ `fortran-break-before-delimiters'
+ Non-nil causes `fortran-fill' to break lines before delimiters.
+ (default t)
-Turning on Fortran mode calls the value of the variable fortran-mode-hook
+Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
with no args, if that value is non-nil."
(interactive)
(kill-all-local-variables)
- (if fortran-startup-message
- (message "Emacs Fortran mode version %s. Bugs to %s"
- fortran-mode-version bug-fortran-mode))
- (setq fortran-startup-message nil)
(setq local-abbrev-table fortran-mode-abbrev-table)
(set-syntax-table fortran-mode-syntax-table)
+ ;; Font Lock mode support.
+ (make-local-variable 'font-lock-defaults)
+ (setq font-lock-defaults '((fortran-font-lock-keywords
+ fortran-font-lock-keywords-1
+ fortran-font-lock-keywords-2
+ fortran-font-lock-keywords-3)
+ nil t ((?/ . "$/") ("_$" . "w"))
+ beginning-of-fortran-subprogram))
+ (set (make-local-variable 'font-lock-syntactic-keywords)
+ fortran-font-lock-syntactic-keywords)
+ (make-local-variable 'fortran-break-before-delimiters)
+ (setq fortran-break-before-delimiters t)
(make-local-variable 'indent-line-function)
(setq indent-line-function 'fortran-indent-line)
- (make-local-variable 'comment-indent-hook)
- (setq comment-indent-hook 'fortran-comment-hook)
+ (make-local-variable 'comment-indent-function)
+ (setq comment-indent-function 'fortran-comment-hook)
(make-local-variable 'comment-line-start-skip)
(setq comment-line-start-skip
- "^[Cc*]\\(\\([^ \t\n]\\)\\1*\\)?[ \t]*") ;[^ \t\n]* handles c$$$
+ "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
(make-local-variable 'comment-line-start)
(setq comment-line-start "c")
(make-local-variable 'comment-start-skip)
(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 abbrev-mode t) ; ?? (abbrev-mode 1) instead??
+ (set (make-local-variable 'fill-column) 72)
(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))
+ (make-local-variable 'fortran-comment-line-extra-indent)
+ (make-local-variable 'fortran-minimum-statement-indent-fixed)
+ (make-local-variable 'fortran-minimum-statement-indent-tab)
+ (make-local-variable 'fortran-column-ruler-fixed)
+ (make-local-variable 'fortran-column-ruler-tab)
+ (setq fortran-tab-mode-string " TAB-format")
+ (setq indent-tabs-mode (fortran-analyze-file-format))
+ (setq imenu-case-fold-search t)
+ (make-local-variable 'imenu-generic-expression)
+ (setq imenu-generic-expression fortran-imenu-generic-expression)
+ (setq imenu-syntax-alist '(("_$" . "w")))
+ (set (make-local-variable 'fill-paragraph-function) 'fortran-fill-paragraph)
+ (set (make-local-variable 'indent-line-function) 'fortran-indent-line)
+ (set (make-local-variable 'indent-region-function)
+ (lambda (start end)
+ (let (fortran-blink-matching-if ; avoid blinking delay
+ indent-region-function)
+ (indent-region start end nil))))
(run-hooks 'fortran-mode-hook))
\f
(defun fortran-comment-hook ()
"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.
+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)
;; Recognize existing comments of either kind.
(cond ((looking-at comment-line-start-skip)
(fortran-indent-line))
- ((re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t)
- (indent-for-comment))
+ ((fortran-find-comment-start-skip) ; 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.
(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))))))
+ fortran-comment-indent-char)
+ (- (fortran-calculate-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.
+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 save-point nil)))
\f
(defun fortran-abbrev-start ()
- "Typing \";\\[help-command]\" or \";?\" lists all the fortran abbrevs.
+ "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))
+ (if (or (eq (setq c (read-event)) ??) ;insert char if not equal to `?'
+ (eq c help-char))
(fortran-abbrev-help)
- (setq unread-command-char c))))
+ (setq unread-command-events (list 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*")
+ (display-buffer (fortran-prepare-abbrev-list-buffer))
(message "Listing abbrev table...done"))
+(defun fortran-prepare-abbrev-list-buffer ()
+ (save-excursion
+ (set-buffer (get-buffer-create "*Abbrevs*"))
+ (erase-buffer)
+ (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (edit-abbrevs-mode))
+ (get-buffer-create "*Abbrevs*"))
+
(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.
+ "Insert a column ruler momentarily above current line, till next keystroke.
+The ruler is defined by the value of `fortran-column-ruler-fixed' when in fixed
+format mode, and `fortran-column-ruler-tab' when in TAB format mode.
The key typed is executed unless it is SPC."
(interactive)
- (momentary-string-display
- fortran-column-ruler (save-excursion (beginning-of-line) (point))
+ (momentary-string-display
+ (if indent-tabs-mode
+ fortran-column-ruler-tab
+ fortran-column-ruler-fixed)
+ (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."
+ "Make 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)
+ (if (< (window-width) (frame-width))
+ (enlarge-window-horizontally (- (frame-width)
(window-width) 1)))
- (split-window-horizontally 73)
+ (let* ((window-edges (window-edges))
+ (scroll-bar-width (- (nth 2 window-edges)
+ (car window-edges)
+ (window-width))))
+ (split-window-horizontally (+ 72 scroll-bar-width)))
(other-window 1)
(switch-to-buffer " fortran-window-extra" t)
(select-window (previous-window))))
- (error (message "No room for fortran window.")
+ (error (message "No room for Fortran window.")
'error)))
(defun fortran-window-create-momentarily (&optional arg)
- "Momentarily makes the window 72 columns wide.
+ "Momentarily make the window 72 columns wide.
Optional ARG non-nil and non-unity disables the momentary feature.
-See also fortran-window-create."
+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)))
+ (let ((char (read-event)))
(or (equal char (string-to-char " "))
- (setq unread-command-char char))))))
+ (setq unread-command-events (list char)))))))
(fortran-window-create)))
(defun fortran-split-line ()
(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)))
- (fortran-indent-line))
+ (if indent-tabs-mode
+ (insert "\n\t" (fortran-numerical-continuation-char))
+ (insert "\n " fortran-continuation-string))) ; Space after \n important
+ (fortran-indent-line)) ; when the cont string is C, c or *.
+
+(defun fortran-remove-continuation ()
+ (if (looking-at "\\( [^ 0\n]\\|\t[1-9]\\|&\\)")
+ (progn (replace-match "")
+ (delete-indentation)
+ t)))
+
+(defun fortran-join-line (arg)
+ "Join current line to the previous one and re-indent.
+With a prefix argument, repeat this operation that many times.
+If the prefix argument ARG is negative, join the next -ARG lines.
+Continuation lines are correctly handled."
+ (interactive "*p")
+ (save-excursion
+ (when (> 0 arg)
+ (setq arg (- arg))
+ (forward-line arg))
+ (while (not (zerop arg))
+ (beginning-of-line)
+ (or (fortran-remove-continuation)
+ (delete-indentation))
+ (setq arg (1- arg)))
+ (fortran-indent-line)))
(defun fortran-numerical-continuation-char ()
- "Return a digit for tab-digit style of continution lines.
+ "Return a digit for tab-digit style of continuation lines.
If, previous line is a tab-digit continuation line, returns that digit
plus one. Otherwise return 1. Zero not allowed."
(save-excursion
(skip-chars-backward chars)
(delete-region (point) (progn (skip-chars-forward chars) (point))))
+(put 'fortran-electric-line-number 'delete-selection t)
(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.
+Auto-indent does not happen if a numeric ARG is used."
(interactive "P")
(if (or arg (not fortran-electric-line-number))
- (if arg
- (self-insert-command arg)
+ (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))
+ (and (= (if indent-tabs-mode
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed) (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))))
+ 'fortran-indent-new-line))))
(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)
+ 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))))
\f
+(defvar fortran-end-prog-re1
+ "end\
+\\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
+\\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?")
+(defvar fortran-end-prog-re
+ (concat "^[ \t0-9]*" fortran-end-prog-re1)
+ "Regexp possibly marking subprogram end.")
+
+(defun fortran-check-end-prog-re ()
+ "Check a preliminary match against `fortran-end-prog-re'."
+ ;; Having got a possible match for the subprogram end, we need a
+ ;; match of whitespace, avoiding possible column 73+ stuff.
+ (save-match-data
+ (string-match "^\\s-*\\(\\'\\|\\s<\\)"
+ (buffer-substring (match-end 0)
+ (min (line-end-position)
+ (+ 72 (line-beginning-position)))))))
+
+;; Note that you can't just check backwards for `subroutine' &c in
+;; case of un-marked main programs not at the start of the file.
(defun beginning-of-fortran-subprogram ()
- "Moves point to the beginning of the current 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))))
+ (save-match-data
+ (let ((case-fold-search t))
+ (beginning-of-line -1)
+ (if (catch 'ok
+ (while (re-search-backward fortran-end-prog-re nil 'move)
+ (if (fortran-check-end-prog-re)
+ (throw 'ok t))))
+ (forward-line)))))
(defun end-of-fortran-subprogram ()
- "Moves point to the end of the current 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)))
+ (save-match-data
+ (let ((case-fold-search t))
+ (if (save-excursion ; on END
+ (beginning-of-line)
+ (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re)))
+ (forward-line)
+ (beginning-of-line 2)
+ (catch 'ok
+ (while (re-search-forward fortran-end-prog-re nil 'move)
+ (if (fortran-check-end-prog-re)
+ (throw 'ok t))))
+ (goto-char (match-beginning 0))
+ (forward-line)))))
(defun mark-fortran-subprogram ()
- "Put mark at end of fortran subprogram, point at beginning.
+ "Put mark at end of Fortran subprogram, point at beginning.
The marks are pushed."
(interactive)
(end-of-fortran-subprogram)
- (push-mark (point))
+ (push-mark (point) nil t)
(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
+ "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
+ (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]"))))
+ (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]*$")
(cond ((and continue-test
(not not-first-statement))
(message "Incomplete continuation statement."))
- (continue-test
+ (continue-test
(fortran-previous-statement))
((not not-first-statement)
'first-statement))))
(defun fortran-next-statement ()
- "Moves point to beginning of the next fortran 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))
+ (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 (concat "[ \t]*" comment-start-skip)))))
(if (not not-last-statement)
'last-statement)))
+
+(defun fortran-narrow-to-subprogram ()
+ "Make text outside the current subprogram invisible.
+The subprogram visible is the one that contains or follows point."
+ (interactive)
+ (save-excursion
+ (mark-fortran-subprogram)
+ (narrow-to-region (point) (mark))))
+
+(defmacro fortran-with-subprogram-narrowing (&rest forms)
+ "Execute FORMS with buffer temporarily narrowed to current subprogram.
+Doesn't push a mark."
+ `(save-restriction
+ (save-excursion
+ (narrow-to-region (progn
+ (beginning-of-fortran-subprogram)
+ (point))
+ (progn
+ (end-of-fortran-subprogram)
+ (point))))
+ ,@forms))
\f
(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)
+ "From an ENDIF statement, blink the matching IF statement."
+ (let ((top-of-window (window-start))
+ (endif-point (point))
+ (case-fold-search t)
+ matching-if
+ message)
(if (save-excursion (beginning-of-line)
(skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*if\\b"))
+ (looking-at "e\\(nd[ \t]*if\\|lse\\([ \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 (not (setq matching-if (fortran-beginning-if)))
+ (setq message "No matching if.")
+ (if (< matching-if top-of-window)
+ (save-excursion
+ (goto-char matching-if)
+ (beginning-of-line)
+ (setq message
+ (concat "Matches "
+ (buffer-substring
+ (point) (progn (end-of-line) (point))))))))
(if message
- (message message)
+ (message "%s" message)
(goto-char matching-if)
(sit-for 1)
(goto-char endif-point))))))
+
+(defun fortran-blink-matching-do ()
+ "From an ENDDO statement, blink the matching DO or DO WHILE statement."
+ ;; This is basically copied from fortran-blink-matching-if.
+ (let ((top-of-window (window-start))
+ (enddo-point (point))
+ (case-fold-search t)
+ matching-do
+ message)
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*do\\b"))
+ (progn
+ (if (not (setq matching-do (fortran-beginning-do)))
+ (setq message "No matching do.")
+ (if (< matching-do top-of-window)
+ (save-excursion
+ (goto-char matching-do)
+ (beginning-of-line)
+ (setq message
+ (concat "Matches "
+ (buffer-substring
+ (point) (progn (end-of-line) (point))))))))
+ (if message
+ (message "%s" message)
+ (goto-char matching-do)
+ (sit-for 1)
+ (goto-char enddo-point))))))
+
+(defun fortran-mark-do ()
+ "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
+The marks are pushed."
+ (interactive)
+ (let (enddo-point do-point)
+ (if (setq enddo-point (fortran-end-do))
+ (if (not (setq do-point (fortran-beginning-do)))
+ (message "No matching do.")
+ ;; Set mark, move point.
+ (goto-char enddo-point)
+ (push-mark)
+ (goto-char do-point)))))
+
+(defun fortran-end-do ()
+ "Search forward for first unmatched ENDDO.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*do\\b"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (= count 0))
+ (not (eq (fortran-next-statement) 'last-statement))
+ ;; Keep local to subprogram
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "end[ \t]*do\\b")
+ (setq count (1- count)))
+ ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
+ (setq count (+ count 1)))))
+ (and (= count 0)
+ ;; All pairs accounted for.
+ (point)))))))
+
+(defun fortran-beginning-do ()
+ "Search backwards for first unmatched DO [WHILE].
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (= count 0))
+ (not (eq (fortran-previous-statement) 'first-statement))
+ ;; Keep local to subprogram
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
+ (setq count (1- count)))
+ ((looking-at "end[ \t]*do\\b")
+ (setq count (1+ count)))))
+
+ (and (= count 0)
+ ;; All pairs accounted for.
+ (point)))))))
+
+(defun fortran-mark-if ()
+ "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
+The marks are pushed."
+ (interactive)
+ (let (endif-point if-point)
+ (if (setq endif-point (fortran-end-if))
+ (if (not (setq if-point (fortran-beginning-if)))
+ (message "No matching if.")
+ ;; Set mark, move point.
+ (goto-char endif-point)
+ (push-mark)
+ (goto-char if-point)))))
+
+(defvar fortran-if-start-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
+
+(defun fortran-end-if ()
+ "Search forwards for first unmatched ENDIF.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*if\\b"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one. The point has been already been moved to first
+ ;; letter on line but this should not cause troubles.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (= count 0))
+ (not (eq (fortran-next-statement) 'last-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "end[ \t]*if\\b")
+ (setq count (- count 1)))
+
+ ((looking-at fortran-if-start-re)
+ (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)))))))
+
+ (and (= count 0)
+ ;; All pairs accounted for.
+ (point)))))))
+
+(defun fortran-beginning-if ()
+ "Search backwards for first unmatched IF-THEN.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion
+ ;; May be sitting on multi-line if-then statement, first move to
+ ;; beginning of current statement. Note: `fortran-previous-statement'
+ ;; moves to previous statement *unless* current statement is first
+ ;; one. Only move forward if not first-statement.
+ (if (not (eq (fortran-previous-statement) 'first-statement))
+ (fortran-next-statement))
+ (skip-chars-forward " \t0-9")
+ (and
+ (looking-at fortran-if-start-re)
+ (save-match-data
+ (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ ;; Multi-line if-then.
+ (let (then-test)
+ (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)))))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
+ (while (and (not (= count 0))
+ (not (eq (fortran-previous-statement) 'first-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at fortran-if-start-re)
+ (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)))))
+
+ (and (= count 0)
+ ;; All pairs accounted for.
+ (point)))))))
\f
(defun fortran-indent-line ()
- "Indents current fortran line based on its contents and on previous lines."
+ "Indent current Fortran line based on its contents and on previous lines."
(interactive)
- (let ((cfi (calculate-fortran-indent)))
+ (let ((cfi (fortran-calculate-indent)))
(save-excursion
(beginning-of-line)
(if (or (not (= cfi (fortran-current-line-indentation)))
(fortran-indent-to-column cfi)
(beginning-of-line)
(if (and (not (looking-at comment-line-start-skip))
- (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) 'move))
+ (fortran-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-function
+ (> (save-excursion (end-of-line) (current-column)) fill-column))
+ (save-excursion
+ (end-of-line)
+ (fortran-fill)))
(if fortran-blink-matching-if
- (fortran-blink-matching-if))))
+ (progn
+ (fortran-blink-matching-if)
+ (fortran-blink-matching-do)))))
-(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."
+(defun fortran-indent-new-line ()
+ "Reindent the current Fortran line, insert a newline and indent the newline.
+An abbrev before point is expanded if variable `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)))
- (insert "\n")
+ (let ((case-fold-search 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."
+ "Properly indent the Fortran subprogram which contains point."
(interactive)
(save-excursion
(mark-fortran-subprogram)
(indent-region (point) (mark) nil))
(message "Indenting subprogram...done."))
-(defun calculate-fortran-indent ()
- "Calculates the fortran indent column based on previous lines."
+(defun fortran-calculate-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))
+ (if indent-tabs-mode
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed)))
(save-excursion
(setq first-statement (fortran-previous-statement))
(if first-statement
(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]")
+ (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?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
+ ;;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\\b[ \t]\
+*[^ \t_$(=a-z0-9]")))))
then-test))
(setq icol (+ icol fortran-if-indent))))
- ((looking-at "\\(else\\|elseif\\)\\b")
+ ((looking-at "else\\(if\\)?\\b")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "select[ \t]*case[ \t](.*)")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "case[ \t]*(.*)")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "case[ \t]*default\\b")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
+ (setq icol (+ icol fortran-if-indent)))
+ ((looking-at "where[ \t]*(.*)[ \t]*\n")
(setq icol (+ icol fortran-if-indent)))
((looking-at "do\\b")
(setq icol (+ icol fortran-do-indent)))
- ((looking-at "end\\b[ \t]*[^ \t=(a-z]")
- ; Previous END resets indent to minimum
+ ((looking-at
+ "\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
+ (setq icol (+ icol fortran-structure-indent)))
+ ((and (looking-at fortran-end-prog-re1)
+ (fortran-check-end-prog-re))
+ ;; Previous END resets indent to minimum
(setq icol fortran-minimum-statement-indent))))))
(save-excursion
(beginning-of-line)
(cond ((looking-at "[ \t]*$"))
((looking-at comment-line-start-skip)
- (setq fortran-minimum-statement-indent 0)
(cond ((eq fortran-comment-indent-style 'relative)
- (setq icol (+ icol fortran-comment-line-column)))
+ (setq icol (+ icol fortran-comment-line-extra-indent)))
((eq fortran-comment-indent-style 'fixed)
- (setq icol fortran-comment-line-column))))
+ (setq icol (+ fortran-minimum-statement-indent
+ fortran-comment-line-extra-indent))))
+ (setq fortran-minimum-statement-indent 0))
((or (looking-at (concat "[ \t]*"
- (regexp-quote fortran-continuation-string)))
+ (regexp-quote
+ fortran-continuation-string)))
(looking-at " [^ 0\n]")
(looking-at "\t[1-9]"))
(setq icol (+ icol fortran-continuation-indent)))
+ ((looking-at "[ \t]*#") ; Check for cpp directive.
+ (setq fortran-minimum-statement-indent 0 icol 0))
(first-statement)
((and fortran-check-all-num-for-matching-do
(looking-at "[ \t]*[0-9]+")
(setq icol (- icol fortran-do-indent)))
(t
(skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*if\\b")
+ (cond ((looking-at "end[ \t]*\\(if\\|select\\|where\\)\\b")
+ (setq icol (- icol fortran-if-indent)))
+ ((looking-at "else\\(if\\)?\\b")
(setq icol (- icol fortran-if-indent)))
- ((looking-at "\\(else\\|elseif\\)\\b")
+ ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
+ (setq icol (- icol fortran-if-indent)))
+ ((looking-at "\\(otherwise\\|else[ \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)))
- ((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
+ ((looking-at "end[ \t]*\
+\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
+ (setq icol (- icol fortran-structure-indent)))
+ ((and (looking-at fortran-end-prog-re1)
+ (fortran-check-end-prog-re)
(not (= icol fortran-minimum-statement-indent)))
(message "Warning: `end' not in column %d. Probably\
an unclosed block." fortran-minimum-statement-indent))))))
(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))))
+ (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]"))
+ (looking-at "\t[1-9]"))
(goto-char (match-end 0)))
(t
;; Move past line number.
- (re-search-forward "^[ \t0-9]*" (+ (point) 4) t)))
+ (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.
+ "Indent 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;
+ 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."
+ 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)))
+ 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
+ (if indent-tabs-mode
(goto-char (match-end 0))
(delete-char 2)
(insert " ")
(insert fortran-continuation-string))
(if (looking-at " [^ 0\n]")
- (if fortran-tab-mode
+ (if indent-tabs-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.
+ ;; 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
+ (if indent-tabs-mode
(progn
- (indent-to fortran-minimum-statement-indent)
+ (indent-to
+ (if indent-tabs-mode
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed))
(delete-char 1)
(insert-char (fortran-numerical-continuation-char) 1))
- (indent-to 5))
- (forward-char 1))
+ (indent-to 5)
+ (forward-char 1)))
((looking-at "[0-9]+")
(let ((extra-space (- 5 (- (match-end 0) (point)))))
(if (< extra-space 0)
(indent-to col)
;; Indent any comment following code on the same line.
(if (and comment-start-skip
- (re-search-forward comment-start-skip
- (save-excursion (end-of-line) (point)) t))
+ (fortran-find-comment-start-skip))
(progn (goto-char (match-beginning 0))
(if (not (= (current-column) (fortran-comment-hook)))
(progn (delete-horizontal-space)
(= (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."
+ "When called from a numbered statement, return t if matching DO is found.
+Otherwise return nil."
(let (charnum
(case-fold-search t))
(save-excursion
(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))))))))
+ (fortran-with-subprogram-narrowing
+ (and (re-search-backward
+ (concat "\\(^[ \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."
+(defun fortran-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)
+ (if (save-excursion
+ (re-search-forward comment-start-skip
+ (save-excursion (end-of-line) (point)) t))
+ (let ((save-match-beginning (match-beginning 0))
+ (save-match-end (match-end 0)))
+ (if (fortran-is-in-string-p (match-beginning 0))
+ (save-excursion
+ (goto-char save-match-end)
+ (fortran-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))
+
+;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
+;; Test if TAB format continuation lines work.
+(defun fortran-is-in-string-p (where)
+ "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
(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)))
+ (goto-char where)
(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"
+ ((bolp) nil) ; bol is never inside a string
+ ((save-excursion ; comment lines too
+ (beginning-of-line)
+ (looking-at comment-line-start-skip)) nil)
+ (t (let (;; ok, serious now. Init some local vars:
+ (parse-state '(0 nil nil nil nil nil 0))
+ (quoted-comment-start (if comment-start
+ (regexp-quote comment-start)))
+ (not-done t)
+ parse-limit
+ end-of-line
+ )
+ ;; move to start of current statement
+ (fortran-next-statement)
+ (fortran-previous-statement)
+ ;; now parse up to WHERE
+ (while not-done
+ (if (or ;; skip to next line if:
+ ;; - comment line?
+ (looking-at comment-line-start-skip)
+ ;; - at end of line?
+ (eolp)
+ ;; - not in a string and after comment-start?
+ (and (not (nth 3 parse-state))
+ comment-start
+ (equal comment-start
+ (char-to-string (preceding-char)))))
+ (if (> (forward-line) 0)
+ (setq not-done nil))
+ ;; else:
+ ;; if we are at beginning of code line, skip any
+ ;; whitespace, labels and tab continuation markers.
+ (if (bolp) (skip-chars-forward " \t0-9"))
+ ;; if we are in column <= 5 now, check for continuation char
+ (cond ((= 5 (current-column)) (forward-char 1))
+ ((and (< (current-column) 5)
+ (equal fortran-continuation-string
+ (char-to-string (following-char)))
+ (forward-char 1))))
+ ;; find out parse-limit from here
+ (setq end-of-line (save-excursion (end-of-line)(point)))
+ (setq parse-limit (min where end-of-line))
+ ;; parse max up to comment-start, if non-nil and in current line
+ (if comment-start
+ (save-excursion
+ (if (re-search-forward quoted-comment-start end-of-line t)
+ (setq parse-limit (min (point) parse-limit)))))
+ ;; now parse if still in limits
+ (if (< (point) where)
+ (setq parse-state (parse-partial-sexp
+ (point) parse-limit nil nil parse-state))
+ (setq not-done nil))
+ ))
+ ;; result is
+ (nth 3 parse-state))))))
+
+(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")
- (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-comment-line-column (max tab-width 6))
- (setq fortran-minimum-statement-indent (max tab-width 6))
- (setq indent-tabs-mode t)
- (setq fortran-column-ruler
- (concat
- "0 810 20 30 40 50 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-comment-line-column 6)
- (setq fortran-minimum-statement-indent 6)
- (setq indent-tabs-mode nil)
- (setq fortran-column-ruler
- (concat
- "0 4 6 10 20 30 40 50 60 70\n"
- "[ ]|{ | | | | | | | | | | | | |}\n"))
- (setq fortran-tab-mode-string " Fixed-format")
- (set-buffer-modified-p (buffer-modified-p)))
-
-(or (assq 'fortran-tab-mode minor-mode-alist)
+ (prog1 (setq auto-fill-function
+ (if (if (null arg)
+ (not auto-fill-function)
+ (> (prefix-numeric-value arg) 0))
+ #'fortran-do-auto-fill
+ nil))
+ (force-mode-line-update)))
+
+(defun fortran-do-auto-fill ()
+ (if (> (current-column) fill-column)
+ (fortran-indent-line)))
+
+(defun fortran-fill ()
+ (interactive)
+ (let* ((auto-fill-function #'fortran-do-auto-fill)
+ (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)
+ (if (fortran-is-in-string-p (point))
+ (save-excursion (re-search-backward "\\S\"\\s\"\\S\"" bol t)
+ (if fortran-break-before-delimiters
+ (point)
+ (1+ (point))))))))
+ ;; 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.
+ ;; Delimiters 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 fortran-break-before-delimiters
+;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
+ )
+ (if (<= (point) (1+ bos))
+ (progn
+ (move-to-column (1+ fill-column))
+ ;;what is this doing???
+ (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t))
+ (goto-char bol))))
+ (if (bolp)
+ (re-search-forward "[ \t]" opoint t)
+ (backward-char)
+ (if (looking-at "\\s\"")
+ (forward-char)
+ (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 fortran-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 (fortran-is-in-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))
+ (+ (fortran-calculate-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 (fortran-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)
+ (or (looking-at " [^ 0\n]")
+ (looking-at "\t[1-9]")))
+ (progn
+ (end-of-line)
+ (delete-region (point) (match-end 0))
+ (delete-horizontal-space)
+ (fortran-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)))))
+
+(defun fortran-analyze-file-format ()
+ "Return nil if fixed format is used, t 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."
+ (let ((i 0))
+ (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") t)
+ ((looking-at " ") nil)
+ (fortran-tab-mode-default t)
+ (t nil)))))
+
+(or (assq 'fortran-tab-mode-string minor-mode-alist)
(setq minor-mode-alist (cons
- '(fortran-tab-mode-string fortran-tab-mode-string)
+ '(fortran-tab-mode-string
+ (indent-tabs-mode fortran-tab-mode-string))
minor-mode-alist)))
+(defun fortran-fill-paragraph (&optional justify)
+ "Fill surrounding comment block as paragraphs, else fill statement.
+
+Intended as the value of `fill-paragraph-function'."
+ (interactive "P")
+ (save-excursion
+ (beginning-of-line)
+ (if (not (looking-at "[Cc*]"))
+ (fortran-fill-statement)
+ ;; We're in a comment block. Find the start and end of a
+ ;; paragraph, delimited either by non-comment lines or empty
+ ;; comments. (Get positions as markers, since the
+ ;; `indent-region' below can shift the block's end).
+ (let* ((non-empty-comment (concat "\\(" comment-line-start-skip
+ "\\)" "[^ \t\n]"))
+ (start (save-excursion
+ ;; Find (start of) first line.
+ (while (and (zerop (forward-line -1))
+ (looking-at non-empty-comment)))
+ (or (looking-at non-empty-comment)
+ (forward-line)) ; overshot
+ (point-marker)))
+ (end (save-excursion
+ ;; Find start of first line past region to fill.
+ (while (progn (forward-line)
+ (looking-at non-empty-comment)))
+ (point-marker))))
+ ;; Indent the block, find the string comprising the effective
+ ;; comment start skip and use that as a fill-prefix for
+ ;; filling the region.
+ (indent-region start end nil)
+ (let ((paragraph-ignore-fill-prefix nil)
+ (fill-prefix (progn (beginning-of-line)
+ (looking-at comment-line-start-skip)
+ (match-string 0))))
+ (let (fill-paragraph-function)
+ (fill-region start end justify))) ; with normal `fill-paragraph'
+ (set-marker start nil)
+ (set-marker end nil))))
+ t)
+
+(defun fortran-fill-statement ()
+ "Fill a fortran statement up to `fill-column'."
+ (interactive)
+ (let ((auto-fill-function #'fortran-do-auto-fill))
+ (if (not (save-excursion
+ (beginning-of-line)
+ (or (looking-at "[ \t]*$")
+ (looking-at comment-line-start-skip)
+ (and comment-start-skip
+ (looking-at (concat "[ \t]*" comment-start-skip))))))
+ (save-excursion
+ ;; Find beginning of statement.
+ (fortran-next-statement)
+ (fortran-previous-statement)
+ ;; Re-indent initially.
+ (fortran-indent-line)
+ ;; Replace newline plus continuation field plus indentation with
+ ;; single space.
+ (while (progn
+ (forward-line)
+ (fortran-remove-continuation)))
+ (fortran-previous-statement)))
+ (fortran-indent-line)))
+
(provide 'fortran)
;;; fortran.el ends here