From: Richard M. Stallman Date: Tue, 25 Mar 1997 03:49:38 +0000 (+0000) Subject: Initial revision X-Git-Tag: emacs-20.1~2699 X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=43e34a410df76a1512e74821cd88d521bd17dcde;p=emacs.git Initial revision --- diff --git a/lisp/progmodes/dcl-mode.el b/lisp/progmodes/dcl-mode.el new file mode 100644 index 00000000000..cd6bcf8f016 --- /dev/null +++ b/lisp/progmodes/dcl-mode.el @@ -0,0 +1,2120 @@ +;;; dcl-mode.el --- major mode for editing DCL command files + +;; Author: Odd Gripenstam +;; Maintainer: Odd Gripenstam +;; Keywords: DCL editing major-mode languages + +;;; Commentary: + +;; DCL mode is a package for editing DCL command files. It helps you +;; indent lines, add leading `$' and trailing `-', move around in the +;; code and insert lexical functions. +;; +;; Type `C-h m' when you are editing a .COM file to get more +;; information about this mode. +;; +;; To use templates you will need a version of tempo.el that is at +;; least later than the buggy 1.1.1, which was included with my versions of +;; Emacs. I used version 1.2.4. +;; The latest tempo.el distribution can be fetched from +;; ftp.lysator.liu.se in the directory /pub/emacs. +;; I recommend setting (setq tempo-interactive t). This will make +;; tempo prompt you for values to put in the blank spots in the templates. +;; +;; There is limited support for imenu. The limitation is that you need +;; a version of imenu.el that uses imenu-generic-expression. I found +;; the version I use in Emacs 19.30. (It was *so* much easier to hook +;; into that version than the one in 19.27...) +;; +;; Any feedback will be welcomed. If you write functions for +;; dcl-calc-command-indent-function or dcl-calc-cont-indent-function, +;; please send them to the maintainer. +;; +;; +;; Ideas for improvement: +;; * Change meaning of `left margin' when dcl-tab-always-indent is nil. +;; Consider the following line (`_' is the cursor): +;; $ label: _ command +;; Pressing tab with the cursor at the underline now inserts a tab. +;; This should be part of the left margin and pressing tab should indent +;; the line. +;; * Make M-LFD work properly with comments in all cases. Now it only +;; works on comment-only lines. But what is "properly"? New rules for +;; indenting comments? +;; * Even smarter indentation of continuation lines. +;; * A delete-indentation function (M-^) that joins continued lines, +;; including lines with end line comments? +;; * Handle DECK/EOD. +;; * `indent list' commands: C-M-q, C-u TAB. What is a list in DCL? One +;; complete command line? A block? A subroutine? + +;;; Code: + +;;; *** Customization ***************************************************** + + +(defvar dcl-basic-offset 4 + "*Number of columns to indent a block in DCL. +A block is the commands between THEN-ELSE-ENDIF and between the commands +dcl-block-begin-regexp and dcl-block-end-regexp. + +The meaning of this variable may be changed if +dcl-calc-command-indent-function is set to a function.") + + +(defvar dcl-continuation-offset 6 + "*Number of columns to indent a continuation line in DCL. +A continuation line is a line that follows a line ending with `-'. + +The meaning of this variable may be changed if +dcl-calc-cont-indent-function is set to a function.") + + +(defvar dcl-margin-offset 8 + "*Indentation for the first command line in DCL. +The first command line in a file or after a SUBROUTINE statement is indented +this much. Other command lines are indented the same number of columns as +the preceding command line. +A command line is a line that starts with `$'.") + + +(defvar dcl-margin-label-offset 2 + "*Number of columns to indent a margin label in DCL. +A margin label is a label that doesn't begin or end a block, i.e. it +doesn't match dcl-block-begin-regexp or dcl-block-end-regexp.") + + +(defvar dcl-comment-line-regexp "^\\$!" + "*Regexp describing the start of a comment line in DCL. +Comment lines are not indented.") + + +(defvar dcl-block-begin-regexp "loop[0-9]*:" + "*Regexp describing a command that begins an indented block in DCL. +Set to nil to only indent at THEN-ELSE-ENDIF.") + + +(defvar dcl-block-end-regexp "endloop[0-9]*:" + "*Regexp describing a command that ends an indented block in DCL. +Set to nil to only indent at THEN-ELSE-ENDIF.") + + +(defvar dcl-calc-command-indent-function nil + "*Function to calculate indentation for a command line in DCL. +If this variable is non-nil it is called as a function: + +\(func INDENT-TYPE CUR-INDENT EXTRA-INDENT LAST-POINT THIS-POINT) + +The function must return the number of columns to indent the current line or +nil to get the default indentation. + +INDENT-TYPE is a symbol indicating what kind of indentation should be done. +It can have the following values: + indent the lines indentation should be increased, e.g. after THEN. + outdent the lines indentation should be decreased, e.g a line with ENDIF. + first-line indentation for the first line in a buffer or SUBROUTINE. +CUR-INDENT is the indentation of the preceding command line. +EXTRA-INDENT is the default change in indentation for this line +\(a negative number for 'outdent). +LAST-POINT is the buffer position of the first significant word on the +previous line or nil if the current line is the first line. +THIS-POINT is the buffer position of the first significant word on the +current line. + +If this variable is nil, the indentation is calculated as +CUR-INDENT + EXTRA-INDENT. + +This package includes two functions suitable for this: + dcl-calc-command-indent-multiple + dcl-calc-command-indent-hang +") + + +(defvar dcl-calc-cont-indent-function 'dcl-calc-cont-indent-relative + "*Function to calculate indentation for a continuation line. +If this variable is non-nil it is called as a function: + +\(func CUR-INDENT EXTRA-INDENT) + +The function must return the number of columns to indent the current line or +nil to get the default indentation. + +If this variable is nil, the indentation is calculated as +CUR-INDENT + EXTRA-INDENT. + +This package includes one function suitable for this: + dcl-calc-cont-indent-relative +") + + +(defvar dcl-tab-always-indent t + "*Controls the operation of the TAB key in DCL mode. +If t, pressing TAB always indents the current line. +If nil, pressing TAB indents the current line if point is at the left margin. +Data lines (i.e. lines not part of a command line or continuation line) are +never indented.") + + +(defvar dcl-electric-characters t + "*Non-nil means reindent immediately when a label, ELSE or ENDIF is inserted.") + + +(defvar dcl-tempo-comma ", " + "*Text to insert when a comma is needed in a template, in DCL mode.") + +(defvar dcl-tempo-left-paren "(" + "*Text to insert when a left parenthesis is needed in a template in DCL.") + + +(defvar dcl-tempo-right-paren ")" + "*Text to insert when a right parenthesis is needed in a template in DCL.") + +; I couldn't decide what looked best, so I'll let you decide... +; Remember, you can also customize this with imenu-submenu-name-format. +(defvar dcl-imenu-label-labels "Labels" + "*Imenu menu title for sub-listing with label names.") +(defvar dcl-imenu-label-goto "GOTO" + "*Imenu menu title for sub-listing with GOTO statements.") +(defvar dcl-imenu-label-gosub "GOSUB" + "*Imenu menu title for sub-listing with GOSUB statements.") +(defvar dcl-imenu-label-call "CALL" + "*Imenu menu title for sub-listing with CALL statements.") + +(defvar dcl-imenu-generic-expression + (` + ((nil "^\\$[ \t]*\\([A-Za-z0-9_\$]+\\):[ \t]+SUBROUTINE\\b" 1) + ((, dcl-imenu-label-labels) + "^\\$[ \t]*\\([A-Za-z0-9_\$]+\\):\\([ \t]\\|$\\)" 1) + ((, dcl-imenu-label-goto) "\\s-GOTO[ \t]+\\([A-Za-z0-9_\$]+\\)" 1) + ((, dcl-imenu-label-gosub) "\\s-GOSUB[ \t]+\\([A-Za-z0-9_\$]+\\)" 1) + ((, dcl-imenu-label-call) "\\s-CALL[ \t]+\\([A-Za-z0-9_\$]+\\)" 1))) +"*Default imenu generic expression for DCL. + +The default includes SUBROUTINE labels in the main listing and +sub-listings for other labels, CALL, GOTO and GOSUB statements. +See `imenu-generic-expression' for details.") + + +(defvar dcl-mode-hook nil + "*Hook called by `dcl-mode'.") + + +;;; *** Global variables **************************************************** + + +(defvar dcl-mode-syntax-table nil + "Syntax table used in DCL-buffers.") +(if dcl-mode-syntax-table + () + (setq dcl-mode-syntax-table (make-syntax-table)) + (modify-syntax-entry ?! "<" dcl-mode-syntax-table) ; comment start + (modify-syntax-entry ?\n ">" dcl-mode-syntax-table) ; comment end + (modify-syntax-entry ?< "(>" dcl-mode-syntax-table) ; < and ... + (modify-syntax-entry ?> ")<" dcl-mode-syntax-table) ; > is a matching pair +) + + +(defvar dcl-mode-map () + "Keymap used in DCL-mode buffers.") +(if dcl-mode-map + () + (setq dcl-mode-map (make-sparse-keymap)) + (define-key dcl-mode-map "\e\n" 'dcl-split-line) + (define-key dcl-mode-map "\e\t" 'tempo-complete-tag) + (define-key dcl-mode-map "\e^" 'dcl-delete-indentation) + (define-key dcl-mode-map "\em" 'dcl-back-to-indentation) + (define-key dcl-mode-map "\ee" 'dcl-forward-command) + (define-key dcl-mode-map "\ea" 'dcl-backward-command) + (define-key dcl-mode-map "\e\C-q" 'dcl-indent-command) + (define-key dcl-mode-map "\t" 'dcl-tab) + (define-key dcl-mode-map ":" 'dcl-electric-character) + (define-key dcl-mode-map "F" 'dcl-electric-character) + (define-key dcl-mode-map "f" 'dcl-electric-character) + (define-key dcl-mode-map "E" 'dcl-electric-character) + (define-key dcl-mode-map "e" 'dcl-electric-character) + (define-key dcl-mode-map "\C-c\C-o" 'dcl-set-option) + (define-key dcl-mode-map "\C-c\C-f" 'tempo-forward-mark) + (define-key dcl-mode-map "\C-c\C-b" 'tempo-backward-mark) + + (define-key dcl-mode-map [menu-bar] (make-sparse-keymap)) + (define-key dcl-mode-map [menu-bar dcl] + (cons "DCL" (make-sparse-keymap "DCL"))) + + ;; Define these in bottom-up order + (define-key dcl-mode-map [menu-bar dcl tempo-backward-mark] + '("Previous template mark" . tempo-backward-mark)) + (define-key dcl-mode-map [menu-bar dcl tempo-forward-mark] + '("Next template mark" . tempo-forward-mark)) + (define-key dcl-mode-map [menu-bar dcl tempo-complete-tag] + '("Complete template tag" . tempo-complete-tag)) + (define-key dcl-mode-map [menu-bar dcl dcl-separator-tempo] + '("--")) + (define-key dcl-mode-map [menu-bar dcl dcl-save-all-options] + '("Save all options" . dcl-save-all-options)) + (define-key dcl-mode-map [menu-bar dcl dcl-save-nondefault-options] + '("Save changed options" . dcl-save-nondefault-options)) + (define-key dcl-mode-map [menu-bar dcl dcl-set-option] + '("Set option" . dcl-set-option)) + (define-key dcl-mode-map [menu-bar dcl dcl-separator-option] + '("--")) + (define-key dcl-mode-map [menu-bar dcl dcl-delete-indentation] + '("Delete indentation" . dcl-delete-indentation)) + (define-key dcl-mode-map [menu-bar dcl dcl-split-line] + '("Split line" . dcl-split-line)) + (define-key dcl-mode-map [menu-bar dcl dcl-indent-command] + '("Indent command" . dcl-indent-command)) + (define-key dcl-mode-map [menu-bar dcl dcl-tab] + '("Indent line/insert tab" . dcl-tab)) + (define-key dcl-mode-map [menu-bar dcl dcl-back-to-indentation] + '("Back to indentation" . dcl-back-to-indentation)) + (define-key dcl-mode-map [menu-bar dcl dcl-forward-command] + '("End of statement" . dcl-forward-command)) + (define-key dcl-mode-map [menu-bar dcl dcl-backward-command] + '("Beginning of statement" . dcl-backward-command)) + ;; imenu is only supported for versions with imenu-generic-expression + (if (boundp 'imenu-generic-expression) + (progn + (define-key dcl-mode-map [menu-bar dcl dcl-separator-movement] + '("--")) + (define-key dcl-mode-map [menu-bar dcl imenu] + '("Buffer index menu" . imenu)))) + ) + + +(defvar dcl-ws-r + "\\([ \t]*-[ \t]*\\(!.*\\)*\n\\)*[ \t]*" + "Regular expression describing white space in a DCL command line. +White space is any number of continued lines with only space,tab,endcomment +followed by space or tab.") + + +(defvar dcl-label-r + "[a-zA-Z0-9_\$]*:\\([ \t!]\\|$\\)" + "Regular expression describing a label. +A label is a name followed by a colon followed by white-space or end-of-line.") + + +(defvar dcl-cmd-r + "^\\$\\(.*-[ \t]*\\(!.*\\)*\n\\)*[^!\"\n]*\\(\".*\\(\"\".*\\)*\"\\)*[^!\"\n]*" + "Regular expression describing a DCL command line up to a trailing comment. +A line starting with $, optionally followed by continuation lines, +followed by the end of the command line. +A continuation line is any characters followed by `-', +optionally followed by a comment, followed by a newline.") + + +(defvar dcl-command-regexp + "^\\$\\(.*-[ \t]*\\(!.*\\)*\n\\)*.*\\(\".*\\(\"\".*\\)*\"\\)*" + "Regular expression describing a DCL command line. +A line starting with $, optionally followed by continuation lines, +followed by the end of the command line. +A continuation line is any characters followed by `-', +optionally followed by a comment, followed by a newline.") + + +(defvar dcl-electric-reindent-regexps + (list "endif" "else" dcl-label-r) + "*Regexps that can trigger an electric reindent. +A list of regexps that will trigger a reindent if the last letter +is defined as dcl-electric-character. + +E.g.: if this list contains `endif', the key `f' is defined as +dcl-electric-character and the you have just typed the `f' in +`endif', the line will be reindented.") + + +(defvar dcl-option-alist + '((dcl-basic-offset dcl-option-value-basic) + (dcl-continuation-offset curval) + (dcl-margin-offset dcl-option-value-margin-offset) + (dcl-margin-label-offset dcl-option-value-offset) + (dcl-comment-line-regexp dcl-option-value-comment-line) + (dcl-block-begin-regexp curval) + (dcl-block-end-regexp curval) + (dcl-tab-always-indent toggle) + (dcl-electric-characters toggle) + (dcl-electric-reindent-regexps curval) + (dcl-tempo-comma curval) + (dcl-tempo-left-paren curval) + (dcl-tempo-right-paren curval) + (dcl-calc-command-indent-function curval) + (dcl-calc-cont-indent-function curval) + (comment-start curval) + (comment-start-skip curval) + ) + "Options and default values for dcl-set-option. + +An alist with option variables and functions or keywords to get a +default value for the option. + +The keywords are: +curval the current value +toggle the opposite of the current value (for t/nil)") + + +(defvar dcl-option-history + (mapcar (lambda (option-assoc) + (format "%s" (car option-assoc))) + dcl-option-alist) + "The history list for dcl-set-option. +Preloaded with all known option names from dcl-option-alist") + + +;; Must be defined after dcl-cmd-r +;; This version is more correct but much slower than the one +;; above. This version won't find GOTOs in comments or text strings. +;(defvar dcl-imenu-generic-expression +; (` +; ((nil "^\\$[ \t]*\\([A-Za-z0-9_\$]+\\):[ \t]+SUBROUTINE\\b" 1) +; ("Labels" "^\\$[ \t]*\\([A-Za-z0-9_\$]+\\):\\([ \t]\\|$\\)" 1) +; ("GOTO" (, (concat dcl-cmd-r "GOTO[ \t]+\\([A-Za-z0-9_\$]+\\)")) 5) +; ("GOSUB" (, (concat dcl-cmd-r +; "GOSUB[ \t]+\\([A-Za-z0-9_\$]+\\)")) 5) +; ("CALL" (, (concat dcl-cmd-r "CALL[ \t]+\\([A-Za-z0-9_\$]+\\)")) 5))) +; "*Default imenu generic expression for DCL. + +;The default includes SUBROUTINE labels in the main listing and +;sub-listings for other labels, CALL, GOTO and GOSUB statements. +;See `imenu-generic-expression' in a recent (e.g. Emacs 19.30) imenu.el +;for details.") + + +;;; *** Mode initialization ************************************************* + + +;;;###autoload +(defun dcl-mode () + "Major mode for editing DCL-files. + +This mode indents command lines in blocks. (A block is commands between +THEN-ELSE-ENDIF and between lines matching dcl-block-begin-regexp and +dcl-block-end-regexp.) + +Labels are indented to a fixed position unless they begin or end a block. +Whole-line comments (matching dcl-comment-line-regexp) are not indented. +Data lines are not indented. + +Key bindings: + +\\{dcl-mode-map} +Commands not usually bound to keys: + +\\[dcl-save-nondefault-options]\t\tSave changed options +\\[dcl-save-all-options]\t\tSave all options +\\[dcl-save-option]\t\t\tSave any option +\\[dcl-save-mode]\t\t\tSave buffer mode + +Variables controlling indentation style and extra features: + + dcl-basic-offset + Extra indentation within blocks. + + dcl-continuation-offset + Extra indentation for continued lines. + + dcl-margin-offset + Indentation for the first command line in a file or SUBROUTINE. + + dcl-margin-label-offset + Indentation for a label. + + dcl-comment-line-regexp + Lines matching this regexp will not be indented. + + dcl-block-begin-regexp + dcl-block-end-regexp + Regexps that match command lines that begin and end, respectively, + a block of commmand lines that will be given extra indentation. + Command lines between THEN-ELSE-ENDIF are always indented; these variables + make it possible to define other places to indent. + Set to nil to disable this feature. + + dcl-calc-command-indent-function + Can be set to a function that customizes indentation for command lines. + Two such functions are included in the package: + dcl-calc-command-indent-multiple + dcl-calc-command-indent-hang + + dcl-calc-cont-indent-function + Can be set to a function that customizes indentation for continued lines. + One such function is included in the package: + dcl-calc-cont-indent-relative (set by default) + + dcl-tab-always-indent + If t, pressing TAB always indents the current line. + If nil, pressing TAB indents the current line if point is at the left + margin. + + dcl-electric-characters + Non-nil causes lines to be indented at once when a label, ELSE or ENDIF is + typed. + + dcl-electric-reindent-regexps + Use this variable and function dcl-electric-character to customize + which words trigger electric indentation. + + dcl-tempo-comma + dcl-tempo-left-paren + dcl-tempo-right-paren + These variables control the look of expanded templates. + + dcl-imenu-generic-expression + Default value for imenu-generic-expression. The default includes + SUBROUTINE labels in the main listing and sub-listings for + other labels, CALL, GOTO and GOSUB statements. + + dcl-imenu-label-labels + dcl-imenu-label-goto + dcl-imenu-label-gosub + dcl-imenu-label-call + Change the text that is used as sub-listing labels in imenu. + +Loading this package calls the value of the variable +`dcl-mode-load-hook' with no args, if that value is non-nil. +Turning on DCL mode calls the value of the variable `dcl-mode-hook' +with no args, if that value is non-nil. + + +The following example uses the default values for all variables: + +$! This is a comment line that is not indented (it matches +$! dcl-comment-line-regexp) +$! Next follows the first command line. It is indented dcl-margin-offset. +$ i = 1 +$ ! Other comments are indented like command lines. +$ ! A margin label indented dcl-margin-label-offset: +$ label: +$ if i.eq.1 +$ then +$ ! Lines between THEN-ELSE and ELSE-ENDIF are +$ ! indented dcl-basic-offset +$ loop1: ! This matches dcl-block-begin-regexp... +$ ! ...so this line is indented dcl-basic-offset +$ text = \"This \" + - ! is a continued line + \"lined up with the command line\" +$ type sys$input +Data lines are not indented at all. +$ endloop1: ! This matches dcl-block-end-regexp +$ endif +$ +" + (interactive) + (kill-all-local-variables) + (set-syntax-table dcl-mode-syntax-table) + + (make-local-variable 'indent-line-function) + (setq indent-line-function 'dcl-indent-line) + + (make-local-variable 'comment-start) + (setq comment-start "!") + + (make-local-variable 'comment-end) + (setq comment-end "") + + (make-local-variable 'comment-multi-line) + (setq comment-multi-line nil) + + ;; This used to be "^\\$[ \t]*![ \t]*" which looks more correct. + ;; The drawback was that you couldn't make empty comment lines by pressing + ;; C-M-j repeatedly - only the first line became a comment line. + ;; This version has the drawback that the "$" can be anywhere in the line, + ;; and something inappropriate might be interpreted as a comment. + (make-local-variable 'comment-start-skip) + (setq comment-start-skip "\\$[ \t]*![ \t]*") + + (if (boundp 'imenu-generic-expression) + (setq imenu-generic-expression dcl-imenu-generic-expression)) + (setq imenu-create-index-function 'dcl-imenu-create-index-function) + + (make-local-variable 'dcl-comment-line-regexp) + (make-local-variable 'dcl-block-begin-regexp) + (make-local-variable 'dcl-block-end-regexp) + (make-local-variable 'dcl-basic-offset) + (make-local-variable 'dcl-continuation-offset) + (make-local-variable 'dcl-margin-label-offset) + (make-local-variable 'dcl-margin-offset) + (make-local-variable 'dcl-tab-always-indent) + (make-local-variable 'dcl-electric-characters) + (make-local-variable 'dcl-calc-command-indent-function) + (make-local-variable 'dcl-calc-cont-indent-function) + (make-local-variable 'dcl-electric-reindent-regexps) + + (setq major-mode 'dcl-mode) + (setq mode-name "DCL") + (use-local-map dcl-mode-map) + (tempo-use-tag-list 'dcl-tempo-tags) + (run-hooks 'dcl-mode-hook)) + + +;;; *** Movement commands *************************************************** + + +;;;------------------------------------------------------------------------- +(defun dcl-beginning-of-statement () + "Go to the beginning of the preceding or current command line." + (interactive) + (re-search-backward dcl-command-regexp nil t)) + + +;;;------------------------------------------------------------------------- +(defun dcl-end-of-statement () + "Go to the end of the next or current command line." + (interactive) + (if (or (dcl-end-of-command-p) + (dcl-beginning-of-command-p) + (not (dcl-command-p))) + () + (dcl-beginning-of-statement)) + (re-search-forward dcl-command-regexp nil t)) + + +;;;------------------------------------------------------------------------- +(defun dcl-beginning-of-command () + "Move point to beginning of current command." + (interactive) + (let ((type (dcl-get-line-type))) + (if (and (eq type '$) + (bolp)) + () ; already in the correct position + (dcl-beginning-of-statement)))) + + +;;;------------------------------------------------------------------------- +(defun dcl-end-of-command () + "Move point to end of current command or next command if not on a command." + (interactive) + (let ((type (dcl-get-line-type)) + (start (point))) + (if (or (eq type '$) + (eq type '-)) + (progn + (dcl-beginning-of-command) + (dcl-end-of-statement)) + (dcl-end-of-statement)))) + + +;;;------------------------------------------------------------------------- +(defun dcl-backward-command (&optional incl-comment-commands) + "Move backward to a command. +Move point to the preceding command line that is not a comment line, +a command line with only a comment, only contains a `$' or only +contains a label. + +Returns point of the found command line or nil if not able to move." + (interactive) + (let ((start (point)) + done + retval) + ;; Find first non-empty command line + (while (not done) + ;; back up one statement and look at the command + (if (dcl-beginning-of-statement) + (cond + ((and dcl-block-begin-regexp ; might be nil + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-begin-regexp))) + (setq done t retval (point))) + ((and dcl-block-end-regexp ; might be nil + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-end-regexp))) + (setq done t retval (point))) + ((looking-at dcl-comment-line-regexp) + t) ; comment line, one more loop + ((and (not incl-comment-commands) + (looking-at "\\$[ \t]*!")) + t) ; comment only command, loop... + ((looking-at "^\\$[ \t]*$") + t) ; empty line, one more loop + ((not (looking-at + (concat "^\\$" dcl-ws-r dcl-label-r dcl-ws-r "$"))) + (setq done t) ; not a label-only line, exit the loop + (setq retval (point)))) + ;; We couldn't go further back, and we haven't found a command yet. + ;; Return to the start positionn + (goto-char start) + (setq done t) + (setq retval nil))) + retval)) + + +;;;------------------------------------------------------------------------- +(defun dcl-forward-command (&optional incl-comment-commands) + "Move forward to a command. +Move point to the end of the next command line that is not a comment line, +a command line with only a comment, only contains a `$' or only +contains a label. + +Returns point of the found command line or nil if not able to move." + (interactive) + (let ((start (point)) + done + retval) + ;; Find first non-empty command line + (while (not done) + ;; go forward one statement and look at the command + (if (dcl-end-of-statement) + (save-excursion + (dcl-beginning-of-statement) + (cond + ((and dcl-block-begin-regexp ; might be nil + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-begin-regexp))) + (setq done t) + (setq retval (point))) + ((and dcl-block-end-regexp ; might be nil + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-end-regexp))) + (setq done t) + (setq retval (point))) + ((looking-at dcl-comment-line-regexp) + t) ; comment line, one more loop + ((and (not incl-comment-commands) + (looking-at "\\$[ \t]*!")) + t) ; comment only command, loop... + ((looking-at "^\\$[ \t]*$") + t) ; empty line, one more loop + ((not (looking-at + (concat "^\\$" dcl-ws-r dcl-label-r dcl-ws-r "$"))) + (setq done t) ; not a label-only line, exit the loop + (setq retval (point))))) + ;; We couldn't go further back, and we haven't found a command yet. + ;; Return to the start positionn + (goto-char start) + (setq done t) + (setq retval nil))) + retval)) + + +;;;------------------------------------------------------------------------- +(defun dcl-back-to-indentation () + "Move point to the first non-whitespace character on this line. +Leading $ and labels counts as whitespace in this case. +If this is a comment line then move to the first non-whitespace character +in the comment. + +Typing \\[dcl-back-to-indentation] several times in a row will move point to other +`interesting' points closer to the left margin, and then back to the +rightmost point again. + +E.g. on the following line, point would go to the positions indicated +by the numbers in order 1-2-3-1-... : + + $ label: command + 3 2 1" + (interactive) + (if (eq last-command 'dcl-back-to-indentation) + (dcl-back-to-indentation-1 (point)) + (dcl-back-to-indentation-1))) +(defun dcl-back-to-indentation-1 (&optional limit) + "Helper function for dcl-back-to-indentation" + + ;; "Indentation points" that we will travel to + ;; $ l: ! comment + ;; 4 3 2 1 + ;; + ;; $ ! text + ;; 3 2 1 + ;; + ;; $ l: command ! + ;; 3 2 1 + ;; + ;; text + ;; 1 + + (let* ((default-limit (save-excursion (end-of-line) (1+ (point)))) + (limit (or limit default-limit)) + (last-good-point (point)) + (opoint (point))) + ;; Move over blanks + (back-to-indentation) + + ;; If we already were at the outermost indentation point then we + ;; start searching for the innermost point again. + (if (= (point) opoint) + (setq limit default-limit)) + + (if (< (point) limit) + (setq last-good-point (point))) + + (cond + ;; Special treatment for comment lines. We are trying to allow + ;; things like "$ !*" as comment lines. + ((looking-at dcl-comment-line-regexp) + (re-search-forward (concat dcl-comment-line-regexp "[ \t]*") limit t) + (if (< (point) limit) + (setq last-good-point (point)))) + + ;; Normal command line + ((looking-at "^\\$[ \t]*") + ;; Move over leading "$" and blanks + (re-search-forward "^\\$[ \t]*" limit t) + (if (< (point) limit) + (setq last-good-point (point))) + + ;; Move over a label (if it isn't a block begin/end) + ;; We must treat block begin/end labels as commands because + ;; dcl-set-option relies on it. + (if (and (looking-at dcl-label-r) + (not (or (and dcl-block-begin-regexp + (looking-at dcl-block-begin-regexp)) + (and dcl-block-end-regexp + (looking-at dcl-block-end-regexp))))) + (re-search-forward (concat dcl-label-r "[ \t]*") limit t)) + (if (< (point) limit) + (setq last-good-point (point))) + + ;; Move over the beginning of a comment + (if (looking-at "![ \t]*") + (re-search-forward "![ \t]*" limit t)) + (if (< (point) limit) + (setq last-good-point (point))))) + (goto-char last-good-point))) + + +;;; *** Support for indentation ********************************************* + + +(defun dcl-get-line-type () + "Determine the type of the current line. +Returns one of the following symbols: + $ for a complete command line or the beginning of a command line. + - for a continuation line + $! for a comment line + data for a data line + empty-data for an empty line following a data line + empty-$ for an empty line following a command line" + (or + ;; Check if it's a comment line. + ;; A comment line starts with $! + (save-excursion + (beginning-of-line) + (if (looking-at dcl-comment-line-regexp) + '$!)) + ;; Check if it's a command line. + ;; A command line starts with $ + (save-excursion + (beginning-of-line) + (if (looking-at "^\\$") + '$)) + ;; Check if it's a continuation line + (save-excursion + (beginning-of-line) + ;; If we're at the beginning of the buffer it can't be a continuation + (if (bobp) + () + (let ((opoint (point))) + (dcl-beginning-of-statement) + (re-search-forward dcl-command-regexp opoint t) + (if (>= (point) opoint) + '-)))) + ;; Empty lines might be different things + (save-excursion + (if (and (bolp) (eolp)) + (if (bobp) + 'empty-$ + (forward-line -1) + (let ((type (dcl-get-line-type))) + (cond + ((or (equal type '$) (equal type '$!) (equal type '-)) + 'empty-$) + ((equal type 'data) + 'empty-data)))))) + ;; Anything else must be a data line + (progn 'data) + )) + + +;;;------------------------------------------------------------------------- +(defun dcl-indentation-point () + "Return point of first non-`whitespace' on this line." + (save-excursion + (dcl-back-to-indentation) + (point))) + + +;;;--------------------------------------------------------------------------- +(defun dcl-show-line-type () + "Test dcl-get-line-type." + (interactive) + (let ((type (dcl-get-line-type))) + (cond + ((equal type '$) + (message "command line")) + ((equal type '\?) + (message "?")) + ((equal type '$!) + (message "comment line")) + ((equal type '-) + (message "continuation line")) + ((equal type 'data) + (message "data")) + ((equal type 'empty-data) + (message "empty-data")) + ((equal type 'empty-$) + (message "empty-$")) + (t + (message "hupp")) + ))) + + +;;; *** Perform indentation ************************************************* + + +;;;--------------------------------------------------------------------------- +(defun dcl-calc-command-indent-multiple + (indent-type cur-indent extra-indent last-point this-point) + "Indent lines to a multiple of dcl-basic-offset. + +Set dcl-calc-command-indent-function to this function to customize +indentation of command lines. + +Command lines that need to be indented beyond the left margin are +always indented to a column that is a multiple of dcl-basic-offset, as +if tab stops were set at 4, 8, 12, etc. + +This supports a formatting style like this (dcl-margin offset = 2, +dcl-basic-offset = 4): + +$ if cond +$ then +$ if cond +$ then +$ ! etc +" + ;; calculate indentation if it's an interesting indent-type, + ;; otherwise return nil to get the default indentation + (let ((indent)) + (cond + ((equal indent-type 'indent) + (setq indent (- cur-indent (% cur-indent dcl-basic-offset))) + (setq indent (+ indent extra-indent)))))) + + +;;;--------------------------------------------------------------------------- +;; Some people actually writes likes this. To each his own... +(defun dcl-calc-command-indent-hang + (indent-type cur-indent extra-indent last-point this-point) + "Indent lines as default, but indent THEN, ELSE and ENDIF extra. + +Set dcl-calc-command-indent-function to this function to customize +indentation of command lines. + +This function supports a formatting style like this: + +$ if cond +$ then +$ xxx +$ endif +$ xxx + +If you use this function you will probably want to add \"then\" to +dcl-electric-reindent-regexps and define the key \"n\" as +dcl-electric-character. +" + (let ((case-fold-search t)) + (save-excursion + (cond + ;; No indentation, this word is `then': +2 + ;; last word was endif: -2 + ((null indent-type) + (or (progn + (goto-char this-point) + (if (looking-at "\\bthen\\b") + (+ cur-indent extra-indent 2))) + (progn + (goto-char last-point) + (if (looking-at "\\bendif\\b") + (- (+ cur-indent extra-indent) 2))))) + ;; Indentation, last word was `then' or `else': -2 + ((equal indent-type 'indent) + (goto-char last-point) + (cond + ((looking-at "\\bthen\\b") + (- (+ cur-indent extra-indent) 2)) + ((looking-at "\\belse\\b") + (- (+ cur-indent extra-indent) 2)))) + ;; Outdent, this word is `endif' or `else': + 2 + ((equal indent-type 'outdent) + (goto-char this-point) + (cond + ((looking-at "\\bendif\\b") + (+ cur-indent extra-indent 2)) + ((looking-at "\\belse\\b") + (+ cur-indent extra-indent 2)))))))) + + +;;;--------------------------------------------------------------------------- +(defun dcl-calc-command-indent () + "Calculate how much the current line shall be indented. +The line is known to be a command line. + +Find the indentation of the preceding line and analyze its contents to +see if the current lines should be indented. +Analyze the current line to see if it should be `outdented'. + +Calculate the indentation of the current line, either with the default +method or by calling dcl-calc-command-indent-function if it is +non-nil. + +If the current line should be outdented, calculate its indentation, +either with the default method or by calling +dcl-calc-command-indent-function if it is non-nil. + + +Rules for default indentation: + +If it is the first line in the buffer, indent dcl-margin-offset. + +Go to the previous command line with a command on it. +Find out how much it is indented (cur-indent). +Look at the first word on the line to see if the indentation should be +adjusted. Skip margin-label, continuations and comments while looking for +the first word. Save this buffer position as `last-point'. +If the first word after a label is SUBROUTINE, set extra-indent to +dcl-margin-offset. + +First word extra-indent +THEN +dcl-basic-offset +ELSE +dcl-basic-offset +block-begin +dcl-basic-offset + +Then return to the current line and look at the first word to see if the +indentation should be adjusted again. Save this buffer position as +`this-point'. + +First word extra-indent +ELSE -dcl-basic-offset +ENDIF -dcl-basic-offset +block-end -dcl-basic-offset + + +If dcl-calc-command-indent-function is nil or returns nil set +cur-indent to cur-indent+extra-indent. + +If an extra adjustment is necessary and if +dcl-calc-command-indent-function is nil or returns nil set cur-indent +to cur-indent+extra-indent. + +See also documentation for dcl-calc-command-indent-function. +The indent-type classification could probably be expanded upon. +" + () + (save-excursion + (beginning-of-line) + (let ((is-block nil) + (case-fold-search t) + cur-indent + (extra-indent 0) + indent-type last-point this-point extra-indent2 cur-indent2 + indent-type2) + (if (bobp) ; first line in buffer + (setq cur-indent 0 extra-indent dcl-margin-offset + indent-type 'first-line + this-point (dcl-indentation-point)) + (save-excursion + (let (done) + ;; Find first non-empty command line + (while (not done) + ;; back up one statement and look at the command + (if (dcl-beginning-of-statement) + (cond + ((and dcl-block-begin-regexp ; might be nil + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-begin-regexp))) + (setq done t) (setq is-block t)) + ((and dcl-block-end-regexp ; might be nil + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-end-regexp))) + (setq done t) (setq is-block t)) + ((looking-at dcl-comment-line-regexp) + t) ; comment line, one more loop + ((looking-at "^\\$[ \t]*$") + t) ; empty line, one more loop + ((not (looking-at + (concat "^\\$" dcl-ws-r dcl-label-r dcl-ws-r "$"))) + (setq done t))) ; not a label-only line, exit the loop + ;; We couldn't go further back, so this must have been the + ;; first line. + (setq cur-indent dcl-margin-offset + last-point (dcl-indentation-point)) + (setq done t))) + ;; Examine the line to get current indentation and possibly a + ;; reason to indent. + (cond + (cur-indent) + ((looking-at (concat "^\\$[ \t]*" dcl-label-r dcl-ws-r + "\\(subroutine\\b\\)")) + (setq cur-indent dcl-margin-offset + last-point (1+ (match-beginning 1)))) + (t + ;; Find out how much this line is indented. + ;; Look at comment, continuation character, command but not label + ;; unless it's a block. + (if is-block + (re-search-forward "^\\$[ \t]*") + (re-search-forward (concat "^\\$[ \t]*\\(" dcl-label-r + "\\)*[ \t]*"))) + (setq cur-indent (current-column)) + ;; Look for a reason to indent: Find first word on this line + (re-search-forward dcl-ws-r) + (setq last-point (point)) + (cond + ((looking-at "\\bthen\\b") + (setq extra-indent dcl-basic-offset indent-type 'indent)) + ((looking-at "\\belse\\b") + (setq extra-indent dcl-basic-offset indent-type 'indent)) + ((and dcl-block-begin-regexp ; might be nil + (looking-at dcl-block-begin-regexp)) + (setq extra-indent dcl-basic-offset indent-type 'indent)) + )))))) + (setq extra-indent2 0) + ;; We're back at the beginning of the original line. + ;; Look for a reason to outdent: Find first word on this line + (re-search-forward (concat "^\\$" dcl-ws-r)) + (setq this-point (dcl-indentation-point)) + (cond + ((looking-at "\\belse\\b") + (setq extra-indent2 (- dcl-basic-offset) indent-type2 'outdent)) + ((looking-at "\\bendif\\b") + (setq extra-indent2 (- dcl-basic-offset) indent-type2 'outdent)) + ((and dcl-block-end-regexp ; might be nil + (looking-at dcl-block-end-regexp)) + (setq extra-indent2 (- dcl-basic-offset) indent-type2 'outdent)) + ((looking-at (concat dcl-label-r dcl-ws-r "\\(subroutine\\b\\)")) + (setq cur-indent2 0 extra-indent2 dcl-margin-offset + indent-type2 'first-line + this-point (1+ (match-beginning 1))))) + ;; Calculate indent + (setq cur-indent + (or (and dcl-calc-command-indent-function + (funcall dcl-calc-command-indent-function + indent-type cur-indent extra-indent + last-point this-point)) + (+ cur-indent extra-indent))) + ;; Calculate outdent + (if indent-type2 + (progn + (or cur-indent2 (setq cur-indent2 cur-indent)) + (setq cur-indent + (or (and dcl-calc-command-indent-function + (funcall dcl-calc-command-indent-function + indent-type2 cur-indent2 extra-indent2 + last-point this-point)) + (+ cur-indent2 extra-indent2))))) + cur-indent + ))) + + +;;;--------------------------------------------------------------------------- +(defun dcl-calc-cont-indent-relative (cur-indent extra-indent) + "Indent continuation lines to align with words on previous line. + +Indent continuation lines to a position relative to preceding +significant command line elements. + +Set `dcl-calc-cont-indent-function' to this function to customize +indentation of continuation lines. + +Indented lines will align with either: + +* the second word on the command line + $ set default - + [-] +* the word after an asignment + $ a = b + - + d +* the third word if it's a qualifier + $ set terminal/width=80 - + /page=24 +* the innermost nonclosed parenthesis + $ if ((a.eq.b .and. - + d.eq.c .or. f$function(xxxx, - + yyy))) +" + (let ((case-fold-search t) + indent) + (save-excursion + (dcl-beginning-of-statement) + (let ((end (save-excursion (forward-line 1) (point)))) + ;; Move over blanks and label + (if (re-search-forward (concat "^\\$[ \t]*\\(" dcl-label-r + "\\)*[ \t]*") end t) + (progn + ;; Move over the first word (might be `@filespec') + (if (> (skip-chars-forward "@:[]<>$\\-a-zA-Z0-9_.;" end) 0) + (let (was-assignment) + (skip-chars-forward " \t" end) + ;; skip over assignment if there is one + (if (looking-at ":?==?") + (progn + (setq was-assignment t) + (skip-chars-forward " \t:=" end))) + ;; This could be the position to indent to + (setq indent (current-column)) + + ;; Move to the next word unless we have seen an + ;; assignment. If it starts with `/' it's a + ;; qualifier and we will indent to that position + (if (and (not was-assignment) + (> (skip-chars-forward "a-zA-Z0-9_" end) 0)) + (progn + (skip-chars-forward " \t" end) + (if (= (char-after (point)) ?/) + (setq indent (current-column))))) + )))))) + ;; Now check if there are any parenthesis to adjust to. + ;; If there is, we will indent to the position after the last non-closed + ;; opening parenthesis. + (save-excursion + (beginning-of-line) + (let* ((start (save-excursion (dcl-beginning-of-statement) (point))) + (parse-sexp-ignore-comments t) ; for parse-partial + (par-pos (nth 1 (parse-partial-sexp start (point))))) + (if par-pos ; is nil if no parenthesis was found + (setq indent (save-excursion + (goto-char par-pos) + (1+ (current-column))))))) + indent)) + + +;;;--------------------------------------------------------------------------- +(defun dcl-calc-continuation-indent () + "Calculate how much the current line shall be indented. +The line is known to be a continuation line. + +Go to the previous command line. +Find out how much it is indented." +;; This was copied without much thought from dcl-calc-command-indent, so +;; it's a bit clumsy. + () + (save-excursion + (beginning-of-line) + (if (bobp) + ;; Huh? a continuation line first in the buffer?? + dcl-margin-offset + (let ((is-block nil) + (indent)) + (save-excursion + ;; Find first non-empty command line + (let ((done)) + (while (not done) + (if (dcl-beginning-of-statement) + (cond + ((and dcl-block-begin-regexp + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-begin-regexp))) + (setq done t) (setq is-block t)) + ((and dcl-block-end-regexp + (looking-at (concat "^\\$" dcl-ws-r + dcl-block-end-regexp))) + (setq done t) (setq is-block t)) + ((looking-at dcl-comment-line-regexp) + t) + ((looking-at "^\\$[ \t]*$") + t) + ((not (looking-at + (concat "^\\$" dcl-ws-r dcl-label-r dcl-ws-r "$"))) + (setq done t))) + ;; This must have been the first line. + (setq indent dcl-margin-offset) + (setq done t))) + (if indent + () + ;; Find out how much this line is indented. + ;; Look at comment, continuation character, command but not label + ;; unless it's a block. + (if is-block + (re-search-forward "^\\$[ \t]*") + (re-search-forward (concat "^\\$[ \t]*\\(" dcl-label-r + "\\)*[ \t]*"))) + (setq indent (current-column)) + ))) + ;; We're back at the beginning of the original line. + (or (and dcl-calc-cont-indent-function + (funcall dcl-calc-cont-indent-function indent + dcl-continuation-offset)) + (+ indent dcl-continuation-offset)) + )))) + + +;;;--------------------------------------------------------------------------- +(defun dcl-indent-command-line () + "Indent a line known to be a command line." + (let ((indent (dcl-calc-command-indent)) + (pos (- (point-max) (point)))) + (save-excursion + (beginning-of-line) + (re-search-forward "^\\$[ \t]*") + ;; Indent any margin-label if the offset is set + ;; (Don't look at block labels) + (if (and dcl-margin-label-offset + (looking-at dcl-label-r) + (not (and dcl-block-begin-regexp + (looking-at dcl-block-begin-regexp))) + (not (and dcl-block-end-regexp + (looking-at dcl-block-end-regexp)))) + (progn + (dcl-indent-to dcl-margin-label-offset) + (re-search-forward dcl-label-r))) + (dcl-indent-to indent 1) + ) + ;; + (if (> (- (point-max) pos) (point)) + (goto-char (- (point-max) pos))) + )) + + +;;;------------------------------------------------------------------------- +(defun dcl-indent-continuation-line () + "Indent a line known to be a continuation line. + +Notice that no special treatment is made for labels. They have to be +on the first part on a command line to be taken into consideration." + (let ((indent (dcl-calc-continuation-indent))) + (save-excursion + (beginning-of-line) + (re-search-forward "^[ \t]*") + (dcl-indent-to indent)) + (skip-chars-forward " \t"))) + + +;;;--------------------------------------------------------------------------- +(defun dcl-delete-chars (chars) + "Delete all characters in the set CHARS around point." + (skip-chars-backward chars) + (delete-region (point) (progn (skip-chars-forward chars) (point)))) + + +;;;--------------------------------------------------------------------------- +(defun dcl-indent-line () + "The DCL version of `indent-line-function'. +Adjusts indentation on the current line. Data lines are not indented." + (let ((type (dcl-get-line-type))) + (cond + ((equal type '$) + (dcl-indent-command-line)) + ((equal type '\?) + (message "Unknown line type!")) + ((equal type '$!)) + ((equal type 'data)) + ((equal type 'empty-data)) + ((equal type '-) + (dcl-indent-continuation-line)) + ((equal type 'empty-$) + (insert "$" ) + (dcl-indent-command-line)) + (t + (message "dcl-indent-line: unknown type")) + ))) + + +;;;------------------------------------------------------------------------- +(defun dcl-indent-command () + "Indents the complete command line that point is on. +This includes continuation lines." + (interactive "*") + (let ((type (dcl-get-line-type))) + (if (or (equal type '$) + (equal type '-) + (equal type 'empty-$)) + (save-excursion + (indent-region (progn (or (looking-at "^\\$") + (dcl-beginning-of-statement)) + (point)) + (progn (dcl-end-of-statement) (point)) + nil))))) + + +;;;------------------------------------------------------------------------- +(defun dcl-tab () + "Insert tab in data lines or indent code. +If `dcl-tab-always-indent' is t, code lines are always indented. +If nil, indent the current line only if point is at the left margin or in +the lines indentation; otherwise insert a tab." + (interactive "*") + (let ((type (dcl-get-line-type)) + (start-point (point))) + (cond + ;; Data line : always insert tab + ((or (equal type 'data) (equal type 'empty-data)) + (tab-to-tab-stop)) + ;; Indent only at start of line + ((not dcl-tab-always-indent) ; nil + (let ((search-end-point + (save-excursion + (beginning-of-line) + (re-search-forward "^\\$?[ \t]*" start-point t)))) + (if (or (bolp) + (and search-end-point + (>= search-end-point start-point))) + (dcl-indent-line) + (tab-to-tab-stop)))) + ;; Always indent + ((eq dcl-tab-always-indent t) ; t + (dcl-indent-line)) + ))) + + +;;;------------------------------------------------------------------------- +(defun dcl-electric-character (arg) + "Inserts a character and indents if necessary. +Insert a character if the user gave a numeric argument or the flag +`dcl-electric-characters' is not set. If an argument was given, +insert that many characters. + +The line is only reindented if the word just typed matches any of the +regexps in `dcl-electric-reindent-regexps'." + (interactive "*P") + (if (or arg (not dcl-electric-characters)) + (if arg + (self-insert-command (prefix-numeric-value arg)) + (self-insert-command 1)) + ;; Insert the character and indent + (self-insert-command 1) + (let ((case-fold-search t)) + ;; There must be a better way than (memq t ...). + ;; (apply 'or ...) didn't work + (if (memq t (mapcar 'dcl-was-looking-at dcl-electric-reindent-regexps)) + (dcl-indent-line))))) + + +;;;------------------------------------------------------------------------- +(defun dcl-indent-to (col &optional minimum) + "Like indent-to, but only indents if indentation would change" + (interactive) + (let (cur-indent collapsed indent) + (save-excursion + (skip-chars-forward " \t") + (setq cur-indent (current-column)) + (skip-chars-backward " \t") + (setq collapsed (current-column))) + (setq indent (max col (+ collapsed (or minimum 0)))) + (if (/= indent cur-indent) + (progn + (dcl-delete-chars " \t") + (indent-to col minimum))))) + + +;;;------------------------------------------------------------------------- +(defun dcl-split-line () + "Break line at point and insert text to keep the syntax valid. + +Inserts continuation marks and splits character strings." + ;; Still don't know what to do with comments at the end of a command line. + (interactive "*") + (let (done + (type (dcl-get-line-type))) + (cond + ((or (equal type '$) (equal type '-)) + (let ((info (parse-partial-sexp + (save-excursion (dcl-beginning-of-statement) (point)) + (point)))) + ;; handle some special cases + (cond + ((nth 3 info) ; in text constant + (insert "\" + -\n\"") + (indent-according-to-mode) + (setq done t)) + ((not (nth 4 info)) ; not in comment + (cond + ((and (not (eolp)) + (= (char-after (point)) ?\") + (= (char-after (1- (point))) ?\")) + (progn ; a " "" " situation + (forward-char -1) + (insert "\" + -\n\"") + (forward-char 1) + (indent-according-to-mode) + (setq done t))) + ((and (dcl-was-looking-at "[ \t]*-[ \t]*") ; after cont mark + (looking-at "[ \t]*\\(!.*\\)?$")) + ;; Do default below. This might considered wrong if we're + ;; after a subtraction: $ x = 3 - + ) + (t + (delete-horizontal-space) + (insert " -") + (insert "\n") (indent-according-to-mode) + (setq done t)))) + )))) + ;; use the normal function for other cases + (if (not done) ; normal M-LFD action + (indent-new-comment-line)))) + + +;;;------------------------------------------------------------------------- +(defun dcl-delete-indentation (&optional arg) + "Join this line to previous like delete-indentation. +Also remove the continuation mark if easily detected." + (interactive "*P") + (delete-indentation arg) + (let ((type (dcl-get-line-type))) + (if (and (or (equal type '$) + (equal type '-) + (equal type 'empty-$)) + (not (bobp)) + (= (char-after (1- (point))) ?-)) + (progn + (delete-backward-char 1) + (fixup-whitespace))))) + + +;;; *** Set options ********************************************************* + + +;;;------------------------------------------------------------------------- +(defun dcl-option-value-basic (option-assoc) + "Guess a value for basic-offset." + (save-excursion + (dcl-beginning-of-command) + (let* (;; current lines indentation + (this-indent (save-excursion + (dcl-back-to-indentation) + (current-column))) + ;; previous lines indentation + (prev-indent (save-excursion + (if (dcl-backward-command) + (progn + (dcl-back-to-indentation) + (current-column))))) + (next-indent (save-excursion + (dcl-end-of-command) + (if (dcl-forward-command) + (progn + (dcl-beginning-of-command) + (dcl-back-to-indentation) + (current-column))))) + (diff (if prev-indent + (abs (- this-indent prev-indent))))) + (cond + ((and diff + (/= diff 0)) + diff) + ((and next-indent + (/= (- this-indent next-indent) 0)) + (abs (- this-indent next-indent))) + (t + dcl-basic-offset))))) + + +;;;------------------------------------------------------------------------- +(defun dcl-option-value-offset (option-assoc) + "Guess a value for an offset. +Find the column of the first non-blank character on the line. +Returns a number as a string." + (save-excursion + (beginning-of-line) + (re-search-forward "^$[ \t]*" nil t) + (current-column))) + + +;;;------------------------------------------------------------------------- +(defun dcl-option-value-margin-offset (option-assoc) + "Guess a value for margin offset. +Find the column of the first non-blank character on the line, not +counting labels. +Returns a number as a string." + (save-excursion + (beginning-of-line) + (dcl-back-to-indentation) + (current-column))) + + +;;;------------------------------------------------------------------------- +(defun dcl-option-value-comment-line (option-assoc) + "Guess a value for `dcl-comment-line-regexp'. +Must return a string." + ;; Should we set comment-start and comment-start-skip as well? + ;; If someone wants `$!&' as a comment line, C-M-j won't work well if + ;; they aren't set. + ;; This must be done after the user has given the real value in + ;; dcl-set-option. + (format + "%S" + (save-excursion + (beginning-of-line) + ;; We could search for "^\\$.*!+[^ \t]*", but, as noted above, we + ;; can't handle that case very good, so there is no point in + ;; suggesting it. + (if (looking-at "^\\$[^!\n]*!") + (let ((regexp (buffer-substring (match-beginning 0) (match-end 0)))) + (concat "^" (regexp-quote regexp))) + dcl-comment-line-regexp)))) + + +;;;------------------------------------------------------------------------- +(defun dcl-guess-option-value (option) + "Guess what value the user would like to give the symbol option." + (let* ((option-assoc (assoc option dcl-option-alist)) + (option (car option-assoc)) + (action (car (cdr option-assoc))) + (value (cond + ((fboundp action) + (funcall action option-assoc)) + ((eq action 'toggle) + (not (eval option))) + ((eq action 'curval) + (cond ((or (stringp (symbol-value option)) + (numberp (symbol-value option))) + (format "%S" (symbol-value option))) + (t + (format "'%S" (symbol-value option)))))))) + ;; format the value as a string if not already done + (if (stringp value) + value + (format "%S" value)))) + + +;;;------------------------------------------------------------------------- +(defun dcl-guess-option () + "Guess what option the user wants to set by looking around in the code. +Returns the name of the option variable as a string." + (let ((case-fold-search t)) + (cond + ;; Continued line + ((eq (dcl-get-line-type) '-) + "dcl-calc-cont-indent-function") + ;; Comment line + ((save-excursion + (beginning-of-line) + (looking-at "^\\$[ \t]*!")) + "dcl-comment-line-regexp") + ;; Margin offset: subroutine statement or first line in buffer + ;; Test this before label indentation to detect a subroutine + ((save-excursion + (beginning-of-line) + (or (looking-at (concat "^\\$[ \t]*" dcl-label-r dcl-ws-r + "subroutine")) + (save-excursion + (not (dcl-backward-command t))))) + "dcl-margin-offset") + ;; Margin offset: on command line after subroutine statement + ((save-excursion + (beginning-of-line) + (and (eq (dcl-get-line-type) '$) + (dcl-backward-command) + (looking-at (concat "^\\$[ \t]*" dcl-label-r dcl-ws-r + "subroutine")))) + "dcl-margin-offset") + ;; Label indentation + ((save-excursion + (beginning-of-line) + (and (looking-at (concat "^\\$[ \t]*" dcl-label-r)) + (not (and dcl-block-begin-regexp + (looking-at (concat "^\\$[ \t]*" + dcl-block-begin-regexp)))) + (not (and dcl-block-end-regexp + (looking-at (concat "^\\$[ \t]*" + dcl-block-end-regexp)))))) + "dcl-margin-label-offset") + ;; Basic offset + ((and (eq (dcl-get-line-type) '$) ; beginning of command + (save-excursion + (beginning-of-line) + (let* ((this-indent (save-excursion + (dcl-back-to-indentation) + (current-column))) + (prev-indent (save-excursion + (if (dcl-backward-command) + (progn + (dcl-back-to-indentation) + (current-column))))) + (next-indent (save-excursion + (dcl-end-of-command) + (if (dcl-forward-command) + (progn + (dcl-beginning-of-command) + (dcl-back-to-indentation) + (current-column)))))) + (or (and prev-indent ; last cmd is indented differently + (/= (- this-indent prev-indent) 0)) + (and next-indent + (/= (- this-indent next-indent) 0)))))) + "dcl-basic-offset") + ;; No more guesses. + (t + "")))) + + +;;;------------------------------------------------------------------------- +(defun dcl-set-option (option-sym option-value) + "Set a value for one of the dcl customization variables. +The function tries to guess which variable should be set and to what value. +All variable names are available as completions and in the history list." + (interactive + (let* ((option-sym + (intern (completing-read + "Set DCL option: " ; prompt + (mapcar (function ; alist of valid values + (lambda (option-assoc) + (cons (format "%s" (car option-assoc)) nil))) + dcl-option-alist) + nil ; no predicate + t ; only value from the list OK + (dcl-guess-option) ; initial (default) value + 'dcl-option-history))) ; history list + (option-value + (eval-minibuffer + (format "Set DCL option %s to: " option-sym) + (dcl-guess-option-value option-sym)))) + (list option-sym option-value))) + ;; Should make a sanity check on the symbol/value pair. + ;; `set' instead of `setq' because we want option-sym to be evaluated. + (set option-sym option-value)) + + +;;; *** Save options ******************************************************** + + +;;;------------------------------------------------------------------------- +(defun dcl-save-local-variable (var &optional def-prefix def-suffix) + "Save a variable in a `Local Variables' list. +Set or update the value of VAR in the current buffers +`Local Variables:' list." + ;; Look for "Local variables:" line in last page. + (save-excursion + (goto-char (point-max)) + (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) + (if (let ((case-fold-search t)) + (search-forward "Local Variables:" nil t)) + (let ((continue t) + prefix prefixlen suffix beg + prefix-string suffix-string) + ;; The prefix is what comes before "local variables:" in its line. + ;; The suffix is what comes after "local variables:" in its line. + (skip-chars-forward " \t") + (or (eolp) + (setq suffix-string (buffer-substring (point) + (progn (end-of-line) (point))))) + (goto-char (match-beginning 0)) + (or (bolp) + (setq prefix-string + (buffer-substring (point) + (progn (beginning-of-line) (point))))) + + (if prefix-string (setq prefixlen (length prefix-string) + prefix (regexp-quote prefix-string))) + (if suffix-string (setq suffix (concat (regexp-quote suffix-string) + "$"))) + (while continue + ;; Look at next local variable spec. + (if selective-display (re-search-forward "[\n\C-m]") + (forward-line 1)) + ;; Skip the prefix, if any. + (if prefix + (if (looking-at prefix) + (forward-char prefixlen) + (error "Local variables entry is missing the prefix"))) + ;; Find the variable name; strip whitespace. + (skip-chars-forward " \t") + (setq beg (point)) + (skip-chars-forward "^:\n") + (if (eolp) (error "Missing colon in local variables entry")) + (skip-chars-backward " \t") + (let* ((str (buffer-substring beg (point))) + (found-var (read str)) + val) + ;; Setting variable named "end" means end of list. + (if (string-equal (downcase str) "end") + (progn + ;; Not found. Insert a new entry before this line + (setq continue nil) + (beginning-of-line) + (insert (concat prefix-string (symbol-name var) ": " + (prin1-to-string (eval var)) " " + suffix-string "\n"))) + ;; Is it the variable we are looking for? + (if (eq var found-var) + (progn + ;; Found it: delete the variable value and insert the + ;; new value. + (setq continue nil) + (skip-chars-forward "^:") + (forward-char 1) + (delete-region (point) (progn (read (current-buffer)) + (point))) + (insert " ") + (prin1 (eval var) (current-buffer)) + (skip-chars-backward "\n") + (skip-chars-forward " \t") + (or (if suffix (looking-at suffix) (eolp)) + (error + "Local variables entry is terminated incorrectly"))) + (end-of-line)))))) + ;; Did not find "Local variables:" + (goto-char (point-max)) + (if (not (bolp)) + (insert "\n")) + ;; If def- parameter not set, use comment- if set. In that case, make + ;; sure there is a space in a suitable position + (let ((def-prefix + (cond + (def-prefix + def-prefix) + (comment-start + (if (or (equal comment-start "") + (string-match "[ \t]$" comment-start)) + comment-start + (concat comment-start " "))))) + (def-suffix + (cond + (def-suffix + def-suffix) + (comment-end + (if (or (equal comment-end "") + (string-match "^[ \t]" comment-end)) + comment-end + (concat " " comment-end)))))) + (insert (concat def-prefix "Local variables:" def-suffix "\n")) + (insert (concat def-prefix (symbol-name var) ": " + (prin1-to-string (eval var)) def-suffix "\n")) + (insert (concat def-prefix "end:" def-suffix))) + ))) + + +;;;------------------------------------------------------------------------- +(defun dcl-save-all-options () + "Save all dcl-mode options for this buffer. +Saves or updates all dcl-mode related options in a `Local Variables:' +section at the end of the current buffer." + (interactive "*") + (mapcar (lambda (option-assoc) + (let* ((option (car option-assoc))) + (dcl-save-local-variable option "$! "))) + dcl-option-alist)) + + +;;;------------------------------------------------------------------------- +(defun dcl-save-nondefault-options () + "Save changed DCL mode options for this buffer. +Saves or updates all DCL mode related options that don't have their +default values in a `Local Variables:' section at the end of the +current buffer. + +No entries are removed from the `Local Variables:' section. This means +that if a variable is given a non-default value in the section and +later is manually reset to its default value, the variable's entry will +still be present in the `Local Variables:' section with its old value." + (interactive "*") + (mapcar (lambda (option-assoc) + (let* ((option (car option-assoc)) + (option-name (symbol-name option))) + (if (and (string-equal "dcl-" + (substring option-name 0 4)) + (not (equal (default-value option) (eval option)))) + (dcl-save-local-variable option "$! ")))) + dcl-option-alist)) + + +;;;------------------------------------------------------------------------- +(defun dcl-save-option (option) + "Save a DCL mode option for this buffer. +Saves or updates an option in a `Local Variables:' +section at the end of the current buffer." + (interactive + (let ((option (intern (completing-read "Option: " obarray)))) + (list option))) + (dcl-save-local-variable option)) + + +;;;------------------------------------------------------------------------- +(defun dcl-save-mode () + "Save the current mode for this buffer. +Save the current mode in a `Local Variables:' +section at the end of the current buffer." + (interactive) + (let ((mode (prin1-to-string major-mode))) + (if (string-match "-mode$" mode) + (let ((mode (intern (substring mode 0 (match-beginning 0))))) + (dcl-save-option 'mode)) + (message "Strange mode: %s" mode)))) + + +;;; *** Templates *********************************************************** +;; tempo seems to be the only suitable package among those included in +;; standard Emacs. I would have liked something closer to the functionality +;; of LSE templates... + + +(require 'tempo) +(defvar dcl-tempo-tags nil + "Tempo tags for DCL mode.") + +(tempo-define-template "dcl-f$context" + '("f$context" dcl-tempo-left-paren + (p "context-type: ") dcl-tempo-comma + (p "context-symbol: ") dcl-tempo-comma + (p "selection-item: ") dcl-tempo-comma + (p "selection-value: ") dcl-tempo-comma + (p "value-qualifier: ") dcl-tempo-right-paren) + "f$context" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$csid" + '("f$csid" dcl-tempo-left-paren + (p "context-symbol: ") dcl-tempo-right-paren) + "f$csid" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$cvsi" + '("f$cvsi" dcl-tempo-left-paren + (p "start-bit: ") dcl-tempo-comma + (p "number-of-bits: ") dcl-tempo-comma + (p "string: ") dcl-tempo-right-paren) + "f$cvsi" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$cvtime" + '("f$cvtime" dcl-tempo-left-paren + (p "[input_time]: ") dcl-tempo-comma + (p "[output_time_format]: ") dcl-tempo-comma + (p "[output_field]: ") dcl-tempo-right-paren) + "f$cvtime" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$cvui" + '("f$cvui" dcl-tempo-left-paren + (p "start-bit: ") dcl-tempo-comma + (p "number-of-bits: ") dcl-tempo-comma + (p "string") dcl-tempo-right-paren) + "f$cvui" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$device" + '("f$device" dcl-tempo-left-paren + (p "[search_devnam]: ") dcl-tempo-comma + (p "[devclass]: ") dcl-tempo-comma + (p "[devtype]: ") dcl-tempo-comma + (p "[stream-id]: ") dcl-tempo-right-paren) + "f$device" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$directory" + '("f$directory" dcl-tempo-left-paren + dcl-tempo-right-paren) + "f$directory" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$edit" + '("f$edit" dcl-tempo-left-paren + (p "string: ") dcl-tempo-comma + (p "edit-list: ") dcl-tempo-right-paren) + "f$edit" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$element" + '("f$element" dcl-tempo-left-paren + (p "element-number: ") dcl-tempo-comma + (p "delimiter: ") dcl-tempo-comma + (p "string: ") dcl-tempo-right-paren) + "f$element" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$environment" + '("f$environment" dcl-tempo-left-paren + (p "item: ") dcl-tempo-right-paren) + "f$environment" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$extract" + '("f$extract" dcl-tempo-left-paren + (p "start: ") dcl-tempo-comma + (p "length: ") dcl-tempo-comma + (p "string: ") dcl-tempo-right-paren) + "f$extract" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$fao" + '("f$fao" dcl-tempo-left-paren + (p "control-string: ") dcl-tempo-comma + ("argument[,...]: ") dcl-tempo-right-paren) + "f$fao" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$file_attributes" + '("f$file_attributes" dcl-tempo-left-paren + (p "filespec: ") dcl-tempo-comma + (p "item: ") dcl-tempo-right-paren) + "f$file_attributes" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$getdvi" + '("f$getdvi" dcl-tempo-left-paren + (p "device-name: ") dcl-tempo-comma + (p "item: ") dcl-tempo-right-paren) + "f$getdvi" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$getjpi" + '("f$getjpi" dcl-tempo-left-paren + (p "pid: ") dcl-tempo-comma + (p "item: ") dcl-tempo-right-paren ) + "f$getjpi" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$getqui" + '("f$getqui" dcl-tempo-left-paren + (p "function: ") dcl-tempo-comma + (p "[item]: ") dcl-tempo-comma + (p "[object-id]: ") dcl-tempo-comma + (p "[flags]: ") dcl-tempo-right-paren) + "f$getqui" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$getsyi" + '("f$getsyi" dcl-tempo-left-paren + (p "item: ") dcl-tempo-comma + (p "[node-name]: ") dcl-tempo-comma + (p "[cluster-id]: ") dcl-tempo-right-paren) + "f$getsyi" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$identifier" + '("f$identifier" dcl-tempo-left-paren + (p "identifier: ") dcl-tempo-comma + (p "conversion-type: ") dcl-tempo-right-paren) + "f$identifier" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$integer" + '("f$integer" dcl-tempo-left-paren + (p "expression: ") dcl-tempo-right-paren) + "f$integer" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$length" + '("f$length" dcl-tempo-left-paren + (p "string: ") dcl-tempo-right-paren ) + "f$length" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$locate" + '("f$locate" dcl-tempo-left-paren + (p "substring: ") dcl-tempo-comma + (p "string: ") dcl-tempo-right-paren) + "f$locate" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$message" + '("f$message" dcl-tempo-left-paren + (p "status-code: ") dcl-tempo-right-paren ) + "f$message" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$mode" + '("f$mode" dcl-tempo-left-paren dcl-tempo-right-paren) + "f$mode" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$parse" + '("f$parse" dcl-tempo-left-paren + (p "filespec: ") dcl-tempo-comma + (p "[default-spec]: ") dcl-tempo-comma + (p "[related-spec]: ") dcl-tempo-comma + (p "[field]: ") dcl-tempo-comma + (p "[parse-type]: ") dcl-tempo-right-paren) + "f$parse" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$pid" + '("f$pid" dcl-tempo-left-paren + (p "context-symbol: ") dcl-tempo-right-paren) + "f$pid" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$privilege" + '("f$privilege" dcl-tempo-left-paren + (p "priv-states: ") dcl-tempo-right-paren) + "f$privilege" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$process" + '("f$process()") + "f$process" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$search" + '("f$search" dcl-tempo-left-paren + (p "filespec: ") dcl-tempo-comma + (p "[stream-id]: ") dcl-tempo-right-paren) + "f$search" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$setprv" + '("f$setprv" dcl-tempo-left-paren + (p "priv-states: ") dcl-tempo-right-paren) + "f$setprv" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$string" + '("f$string" dcl-tempo-left-paren + (p "expression: ") dcl-tempo-right-paren) + "f$string" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$time" + '("f$time" dcl-tempo-left-paren dcl-tempo-right-paren) + "f$time" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$trnlnm" + '("f$trnlnm" dcl-tempo-left-paren + (p "logical-name: ") dcl-tempo-comma + (p "[table]: ") dcl-tempo-comma + (p "[index]: ") dcl-tempo-comma + (p "[mode]: ") dcl-tempo-comma + (p "[case]: ") dcl-tempo-comma + (p "[item]: ") dcl-tempo-right-paren) + "f$trnlnm" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$type" + '("f$type" dcl-tempo-left-paren + (p "symbol-name: ") dcl-tempo-right-paren) + "f$type" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$user" + '("f$user" dcl-tempo-left-paren dcl-tempo-right-paren) + "f$user" "" 'dcl-tempo-tags) + +(tempo-define-template "dcl-f$verify" + '("f$verify" dcl-tempo-left-paren + (p "[procedure-value]: ") dcl-tempo-comma + (p "[image-value]: ") dcl-tempo-right-paren) + "f$verify" "" 'dcl-tempo-tags) + + + + +;;; *** Unsorted stuff ***************************************************** + + +;;;------------------------------------------------------------------------- +(defun dcl-beginning-of-command-p () + "Return t if point is at the beginning of a command. +Otherwise return nil." + (and (bolp) + (eq (dcl-get-line-type) '$))) + + +;;;------------------------------------------------------------------------- +(defun dcl-end-of-command-p () + "Check if point is at the end of a command. +Return t if point is at the end of a command, either the end of an +only line or at the end of the last continuation line. +Otherwise return nil." + ;; Must be at end-of-line on a command line or a continuation line + (let ((type (dcl-get-line-type))) + (if (and (eolp) + (or (eq type '$) + (eq type '-))) + ;; Next line must not be a continuation line + (save-excursion + (forward-line) + (not (eq (dcl-get-line-type) '-)))))) + + +;;;------------------------------------------------------------------------- +(defun dcl-command-p () + "Check if point is on a command line. +Return t if point is on a command line or a continuation line, +otherwise return nil." + (let ((type (dcl-get-line-type))) + (or (eq type '$) + (eq type '-)))) + + +;;;------------------------------------------------------------------------- +(defun dcl-was-looking-at (regexp) + (save-excursion + (let ((start (point)) + (found (re-search-backward regexp 0 t))) + (if (not found) + () + (equal start (match-end 0)))))) + + +;;;------------------------------------------------------------------------- +(defun dcl-imenu-create-index-function () + "Jacket routine to make imenu searches non case sensitive." + (let ((case-fold-search t)) + (imenu-default-create-index-function))) + + + +;;; *** Epilogue ************************************************************ + + +(provide 'dcl-mode) + +(run-hooks 'dcl-mode-load-hook) ; for your customizations + +;;; dcl-mode.el ends here