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1631 lines
56 KiB
EmacsLisp
1631 lines
56 KiB
EmacsLisp
;;; pascal.el --- major mode for editing pascal source in Emacs
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;; Copyright (C) 1993, 94, 95, 96, 97, 98, 1999, 2000 Free Software Foundation, Inc.
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;; Author: Espen Skoglund <esk@gnu.org>
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;; Keywords: languages
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; USAGE
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;; =====
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;; Emacs should enter Pascal mode when you find a Pascal source file.
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;; When you have entered Pascal mode, you may get more info by pressing
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;; C-h m. You may also get online help describing various functions by:
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;; C-h f <Name of function you want described>
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;; If you want to customize Pascal mode to fit you better, you may add
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;; these lines (the values of the variables presented here are the defaults):
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;;
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;; ;; User customization for Pascal mode
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;; (setq pascal-indent-level 3
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;; pascal-case-indent 2
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;; pascal-auto-newline nil
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;; pascal-tab-always-indent t
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;; pascal-auto-endcomments t
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;; pascal-auto-lineup '(all)
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;; pascal-toggle-completions nil
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;; pascal-type-keywords '("array" "file" "packed" "char"
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;; "integer" "real" "string" "record")
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;; pascal-start-keywords '("begin" "end" "function" "procedure"
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;; "repeat" "until" "while" "read" "readln"
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;; "reset" "rewrite" "write" "writeln")
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;; pascal-separator-keywords '("downto" "else" "mod" "div" "then"))
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;; KNOWN BUGS / BUGREPORTS
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;; =======================
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;; As far as I know, there are no bugs in the current version of this
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;; package. This may not be true however, since I never use this mode
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;; myself and therefore would never notice them anyway. If you do
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;; find any bugs, you may submit them to: esk@gnu.org as well as to
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;; bug-gnu-emacs@gnu.org.
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;;; Code:
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(defgroup pascal nil
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"Major mode for editing Pascal source in Emacs"
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:group 'languages)
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(defvar pascal-mode-abbrev-table nil
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"Abbrev table in use in Pascal-mode buffers.")
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(define-abbrev-table 'pascal-mode-abbrev-table ())
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(defvar pascal-mode-map ()
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"Keymap used in Pascal mode.")
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(if pascal-mode-map
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()
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(setq pascal-mode-map (make-sparse-keymap))
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(define-key pascal-mode-map ";" 'electric-pascal-semi-or-dot)
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(define-key pascal-mode-map "." 'electric-pascal-semi-or-dot)
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(define-key pascal-mode-map ":" 'electric-pascal-colon)
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(define-key pascal-mode-map "=" 'electric-pascal-equal)
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(define-key pascal-mode-map "#" 'electric-pascal-hash)
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(define-key pascal-mode-map "\r" 'electric-pascal-terminate-line)
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(define-key pascal-mode-map "\t" 'electric-pascal-tab)
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(define-key pascal-mode-map "\M-\t" 'pascal-complete-word)
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(define-key pascal-mode-map "\M-?" 'pascal-show-completions)
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(define-key pascal-mode-map "\177" 'backward-delete-char-untabify)
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(define-key pascal-mode-map "\M-\C-h" 'pascal-mark-defun)
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(define-key pascal-mode-map "\C-c\C-b" 'pascal-insert-block)
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(define-key pascal-mode-map "\M-*" 'pascal-star-comment)
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(define-key pascal-mode-map "\C-c\C-c" 'pascal-comment-area)
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(define-key pascal-mode-map "\C-c\C-u" 'pascal-uncomment-area)
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(define-key pascal-mode-map "\M-\C-a" 'pascal-beg-of-defun)
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(define-key pascal-mode-map "\M-\C-e" 'pascal-end-of-defun)
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(define-key pascal-mode-map "\C-c\C-d" 'pascal-goto-defun)
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(define-key pascal-mode-map "\C-c\C-o" 'pascal-outline)
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;;; A command to change the whole buffer won't be used terribly
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;;; often, so no need for a key binding.
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; (define-key pascal-mode-map "\C-cd" 'pascal-downcase-keywords)
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; (define-key pascal-mode-map "\C-cu" 'pascal-upcase-keywords)
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; (define-key pascal-mode-map "\C-cc" 'pascal-capitalize-keywords)
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)
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(defvar pascal-imenu-generic-expression
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'((nil "^[ \t]*\\(function\\|procedure\\)[ \t\n]+\\([a-zA-Z0-9_.:]+\\)" 2))
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"Imenu expression for Pascal-mode. See `imenu-generic-expression'.")
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(defvar pascal-keywords
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'("and" "array" "begin" "case" "const" "div" "do" "downto" "else" "end"
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"file" "for" "function" "goto" "if" "in" "label" "mod" "nil" "not" "of"
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"or" "packed" "procedure" "program" "record" "repeat" "set" "then" "to"
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"type" "until" "var" "while" "with"
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;; The following are not standard in pascal, but widely used.
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"get" "put" "input" "output" "read" "readln" "reset" "rewrite" "write"
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"writeln"))
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;;;
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;;; Regular expressions used to calculate indent, etc.
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;;;
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(defconst pascal-symbol-re "\\<[a-zA-Z_][a-zA-Z_0-9.]*\\>")
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(defconst pascal-beg-block-re "\\<\\(begin\\|case\\|record\\|repeat\\)\\>")
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(defconst pascal-end-block-re "\\<\\(end\\|until\\)\\>")
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(defconst pascal-declaration-re "\\<\\(const\\|label\\|type\\|var\\)\\>")
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(defconst pascal-progbeg-re "\\<\\program\\>")
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(defconst pascal-defun-re "\\<\\(function\\|procedure\\|program\\)\\>")
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(defconst pascal-sub-block-re "\\<\\(if\\|else\\|for\\|while\\|with\\)\\>")
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(defconst pascal-noindent-re "\\<\\(begin\\|end\\|until\\|else\\)\\>")
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(defconst pascal-nosemi-re "\\<\\(begin\\|repeat\\|then\\|do\\|else\\)\\>")
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(defconst pascal-autoindent-lines-re
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"\\<\\(label\\|var\\|type\\|const\\|until\\|end\\|begin\\|repeat\\|else\\)\\>")
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;;; Strings used to mark beginning and end of excluded text
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(defconst pascal-exclude-str-start "{-----\\/----- EXCLUDED -----\\/-----")
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(defconst pascal-exclude-str-end " -----/\\----- EXCLUDED -----/\\-----}")
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(defvar pascal-mode-syntax-table nil
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"Syntax table in use in Pascal-mode buffers.")
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(if pascal-mode-syntax-table
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()
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(setq pascal-mode-syntax-table (make-syntax-table))
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(modify-syntax-entry ?\\ "." pascal-mode-syntax-table)
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(modify-syntax-entry ?( "()1" pascal-mode-syntax-table)
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(modify-syntax-entry ?) ")(4" pascal-mode-syntax-table)
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(modify-syntax-entry ?* ". 23b" pascal-mode-syntax-table)
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(modify-syntax-entry ?{ "<" pascal-mode-syntax-table)
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(modify-syntax-entry ?} ">" pascal-mode-syntax-table)
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(modify-syntax-entry ?+ "." pascal-mode-syntax-table)
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(modify-syntax-entry ?- "." pascal-mode-syntax-table)
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(modify-syntax-entry ?= "." pascal-mode-syntax-table)
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(modify-syntax-entry ?% "." pascal-mode-syntax-table)
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(modify-syntax-entry ?< "." pascal-mode-syntax-table)
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(modify-syntax-entry ?> "." pascal-mode-syntax-table)
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(modify-syntax-entry ?& "." pascal-mode-syntax-table)
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(modify-syntax-entry ?| "." pascal-mode-syntax-table)
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(modify-syntax-entry ?_ "_" pascal-mode-syntax-table)
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(modify-syntax-entry ?\' "\"" pascal-mode-syntax-table))
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(defconst pascal-font-lock-keywords (purecopy
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(list
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'("^[ \t]*\\(function\\|pro\\(cedure\\|gram\\)\\)\\>[ \t]*\\([a-z]\\)"
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1 font-lock-keyword-face)
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'("^[ \t]*\\(function\\|pro\\(cedure\\|gram\\)\\)\\>[ \t]*\\([a-z][a-z0-9_]*\\)"
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3 font-lock-function-name-face t)
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; ("type" "const" "real" "integer" "char" "boolean" "var"
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; "record" "array" "file")
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(cons (concat "\\<\\(array\\|boolean\\|c\\(har\\|onst\\)\\|file\\|"
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"integer\\|re\\(al\\|cord\\)\\|type\\|var\\)\\>")
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'font-lock-type-face)
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'("\\<\\(label\\|external\\|forward\\)\\>" . font-lock-constant-face)
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'("\\<\\([0-9]+\\)[ \t]*:" 1 font-lock-function-name-face)
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; ("of" "to" "for" "if" "then" "else" "case" "while"
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; "do" "until" "and" "or" "not" "in" "with" "repeat" "begin" "end")
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(concat "\\<\\("
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"and\\|begin\\|case\\|do\\|e\\(lse\\|nd\\)\\|for\\|i[fn]\\|"
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"not\\|o[fr]\\|repeat\\|t\\(hen\\|o\\)\\|until\\|w\\(hile\\|ith\\)"
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"\\)\\>")
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'("\\<\\(goto\\)\\>[ \t]*\\([0-9]+\\)?"
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1 font-lock-keyword-face)
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'("\\<\\(goto\\)\\>[ \t]*\\([0-9]+\\)?"
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2 font-lock-keyword-face t)))
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"Additional expressions to highlight in Pascal mode.")
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(put 'pascal-mode 'font-lock-defaults '(pascal-font-lock-keywords nil t))
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(defcustom pascal-indent-level 3
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"*Indentation of Pascal statements with respect to containing block."
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:type 'integer
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:group 'pascal)
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(defcustom pascal-case-indent 2
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"*Indentation for case statements."
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:type 'integer
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:group 'pascal)
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(defcustom pascal-auto-newline nil
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"*Non-nil means automatically insert newlines in certain cases.
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These include after semicolons and after the punctuation mark after an `end'."
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:type 'boolean
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:group 'pascal)
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(defcustom pascal-indent-nested-functions t
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"*Non-nil means nested functions are indented."
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:type 'boolean
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:group 'pascal)
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(defcustom pascal-tab-always-indent t
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"*Non-nil means TAB in Pascal mode should always reindent the current line.
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If this is nil, TAB inserts a tab if it is at the end of the line
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and follows non-whitespace text."
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:type 'boolean
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:group 'pascal)
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(defcustom pascal-auto-endcomments t
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"*Non-nil means automatically insert comments after certain `end's.
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Specifically, this is done after the ends of cases statements and functions.
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The name of the function or case is included between the braces."
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:type 'boolean
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:group 'pascal)
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(defcustom pascal-auto-lineup '(all)
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"*List of contexts where auto lineup of :'s or ='s should be done.
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Elements can be of type: 'paramlist', 'declaration' or 'case', which will
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do auto lineup in parameterlist, declarations or case-statements
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respectively. The word 'all' will do all lineups. '(case paramlist) for
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instance will do lineup in case-statements and parameterlist, while '(all)
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will do all lineups."
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:type '(set :extra-offset 8
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(const :tag "Everything" all)
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(const :tag "Parameter lists" paramlist)
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(const :tag "Decalrations" declaration)
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(const :tag "Case statements" case))
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:group 'pascal)
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(defcustom pascal-toggle-completions nil
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"*Non-nil means \\<pascal-mode-map>\\[pascal-complete-word] should try all possible completions one by one.
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Repeated use of \\[pascal-complete-word] will show you all of them.
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Normally, when there is more than one possible completion,
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it displays a list of all possible completions."
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:type 'boolean
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:group 'pascal)
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(defcustom pascal-type-keywords
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'("array" "file" "packed" "char" "integer" "real" "string" "record")
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"*Keywords for types used when completing a word in a declaration or parmlist.
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These include integer, real, char, etc.
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The types defined within the Pascal program
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are handled in another way, and should not be added to this list."
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:type '(repeat (string :tag "Keyword"))
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:group 'pascal)
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(defcustom pascal-start-keywords
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'("begin" "end" "function" "procedure" "repeat" "until" "while"
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"read" "readln" "reset" "rewrite" "write" "writeln")
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"*Keywords to complete when standing at the first word of a statement.
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These are keywords such as begin, repeat, until, readln.
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The procedures and variables defined within the Pascal program
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are handled in another way, and should not be added to this list."
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:type '(repeat (string :tag "Keyword"))
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:group 'pascal)
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(defcustom pascal-separator-keywords
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'("downto" "else" "mod" "div" "then")
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"*Keywords to complete when NOT standing at the first word of a statement.
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These are keywords such as downto, else, mod, then.
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Variables and function names defined within the Pascal program
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are handled in another way, and should not be added to this list."
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:type '(repeat (string :tag "Keyword"))
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:group 'pascal)
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;;;
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;;; Macros
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;;;
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(defsubst pascal-get-beg-of-line (&optional arg)
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(save-excursion
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(beginning-of-line arg)
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(point)))
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(defsubst pascal-get-end-of-line (&optional arg)
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(save-excursion
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(end-of-line arg)
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(point)))
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(defun pascal-declaration-end ()
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(let ((nest 1))
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(while (and (> nest 0)
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(re-search-forward
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"[:=]\\|\\(\\<record\\>\\)\\|\\(\\<end\\>\\)"
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(save-excursion (end-of-line 2) (point)) t))
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(cond ((match-beginning 1) (setq nest (1+ nest)))
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((match-beginning 2) (setq nest (1- nest)))
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((looking-at "[^(\n]+)") (setq nest 0))))))
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(defun pascal-declaration-beg ()
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(let ((nest 1))
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(while (and (> nest 0)
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(re-search-backward "[:=]\\|\\<\\(type\\|var\\|label\\|const\\)\\>\\|\\(\\<record\\>\\)\\|\\(\\<end\\>\\)" (pascal-get-beg-of-line 0) t))
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(cond ((match-beginning 1) (setq nest 0))
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((match-beginning 2) (setq nest (1- nest)))
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((match-beginning 3) (setq nest (1+ nest)))))
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(= nest 0)))
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(defsubst pascal-within-string ()
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(save-excursion
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(nth 3 (parse-partial-sexp (pascal-get-beg-of-line) (point)))))
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;;;###autoload
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(defun pascal-mode ()
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"Major mode for editing Pascal code. \\<pascal-mode-map>
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TAB indents for Pascal code. Delete converts tabs to spaces as it moves back.
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\\[pascal-complete-word] completes the word around current point with respect \
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to position in code
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\\[pascal-show-completions] shows all possible completions at this point.
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Other useful functions are:
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\\[pascal-mark-defun]\t- Mark function.
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\\[pascal-insert-block]\t- insert begin ... end;
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\\[pascal-star-comment]\t- insert (* ... *)
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\\[pascal-comment-area]\t- Put marked area in a comment, fixing nested comments.
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\\[pascal-uncomment-area]\t- Uncomment an area commented with \
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\\[pascal-comment-area].
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\\[pascal-beg-of-defun]\t- Move to beginning of current function.
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\\[pascal-end-of-defun]\t- Move to end of current function.
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\\[pascal-goto-defun]\t- Goto function prompted for in the minibuffer.
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\\[pascal-outline]\t- Enter pascal-outline-mode (see also pascal-outline).
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Variables controlling indentation/edit style:
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pascal-indent-level (default 3)
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Indentation of Pascal statements with respect to containing block.
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pascal-case-indent (default 2)
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Indentation for case statements.
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pascal-auto-newline (default nil)
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Non-nil means automatically newline after semicolons and the punctuation
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mark after an end.
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pascal-indent-nested-functions (default t)
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Non-nil means nested functions are indented.
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pascal-tab-always-indent (default t)
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Non-nil means TAB in Pascal mode should always reindent the current line,
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regardless of where in the line point is when the TAB command is used.
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pascal-auto-endcomments (default t)
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Non-nil means a comment { ... } is set after the ends which ends cases and
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functions. The name of the function or case will be set between the braces.
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pascal-auto-lineup (default t)
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List of contexts where auto lineup of :'s or ='s should be done.
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See also the user variables pascal-type-keywords, pascal-start-keywords and
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pascal-separator-keywords.
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Turning on Pascal mode calls the value of the variable pascal-mode-hook with
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no args, if that value is non-nil."
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(interactive)
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(kill-all-local-variables)
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(use-local-map pascal-mode-map)
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(setq major-mode 'pascal-mode)
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(setq mode-name "Pascal")
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(setq local-abbrev-table pascal-mode-abbrev-table)
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(set-syntax-table pascal-mode-syntax-table)
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(make-local-variable 'indent-line-function)
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(setq indent-line-function 'pascal-indent-line)
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(make-local-variable 'comment-indent-function)
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(setq comment-indent-function 'pascal-indent-comment)
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(make-local-variable 'parse-sexp-ignore-comments)
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(setq parse-sexp-ignore-comments nil)
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(make-local-variable 'blink-matching-paren-dont-ignore-comments)
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(setq blink-matching-paren-dont-ignore-comments t)
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(make-local-variable 'case-fold-search)
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(setq case-fold-search t)
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(make-local-variable 'comment-start)
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(setq comment-start "{")
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(make-local-variable 'comment-start-skip)
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(setq comment-start-skip "(\\*+ *\\|{ *")
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(make-local-variable 'comment-end)
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(setq comment-end "}")
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;; Font lock support
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(make-local-variable 'font-lock-defaults)
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(setq font-lock-defaults '(pascal-font-lock-keywords nil t))
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;; Imenu support
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(make-local-variable 'imenu-generic-expression)
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(setq imenu-generic-expression pascal-imenu-generic-expression)
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(setq imenu-case-fold-search t)
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(run-hooks 'pascal-mode-hook))
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;;;
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;;; Electric functions
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;;;
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(defun electric-pascal-terminate-line ()
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"Terminate line and indent next line."
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(interactive)
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;; First, check if current line should be indented
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(save-excursion
|
||
(beginning-of-line)
|
||
(skip-chars-forward " \t")
|
||
(if (looking-at pascal-autoindent-lines-re)
|
||
(pascal-indent-line)))
|
||
(delete-horizontal-space) ; Removes trailing whitespaces
|
||
(newline)
|
||
;; Indent next line
|
||
(pascal-indent-line)
|
||
;; Maybe we should set some endcomments
|
||
(if pascal-auto-endcomments
|
||
(pascal-set-auto-comments))
|
||
;; Check if we shall indent inside comment
|
||
(let ((setstar nil))
|
||
(save-excursion
|
||
(forward-line -1)
|
||
(skip-chars-forward " \t")
|
||
(cond ((looking-at "\\*[ \t]+)")
|
||
;; Delete region between `*' and `)' if there is only whitespaces.
|
||
(forward-char 1)
|
||
(delete-horizontal-space))
|
||
((and (looking-at "(\\*\\|\\*[^)]")
|
||
(not (save-excursion
|
||
(search-forward "*)" (pascal-get-end-of-line) t))))
|
||
(setq setstar t))))
|
||
;; If last line was a star comment line then this one shall be too.
|
||
(if (null setstar)
|
||
(pascal-indent-line)
|
||
(insert "* "))))
|
||
|
||
|
||
(defun electric-pascal-semi-or-dot ()
|
||
"Insert `;' or `.' character and reindent the line."
|
||
(interactive)
|
||
(insert last-command-char)
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(pascal-indent-line))
|
||
(if pascal-auto-newline
|
||
(electric-pascal-terminate-line)))
|
||
|
||
(defun electric-pascal-colon ()
|
||
"Insert `:' and do all indentions except line indent on this line."
|
||
(interactive)
|
||
(insert last-command-char)
|
||
;; Do nothing if within string.
|
||
(if (pascal-within-string)
|
||
()
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(pascal-indent-line))
|
||
(let ((pascal-tab-always-indent nil))
|
||
(pascal-indent-command))))
|
||
|
||
(defun electric-pascal-equal ()
|
||
"Insert `=', and do indention if within type declaration."
|
||
(interactive)
|
||
(insert last-command-char)
|
||
(if (eq (car (pascal-calculate-indent)) 'declaration)
|
||
(let ((pascal-tab-always-indent nil))
|
||
(pascal-indent-command))))
|
||
|
||
(defun electric-pascal-hash ()
|
||
"Insert `#', and indent to column 0 if this is a CPP directive."
|
||
(interactive)
|
||
(insert last-command-char)
|
||
(if (save-excursion (beginning-of-line) (looking-at "^[ \t]*#"))
|
||
(save-excursion (beginning-of-line)
|
||
(delete-horizontal-space))))
|
||
|
||
(defun electric-pascal-tab ()
|
||
"Function called when TAB is pressed in Pascal mode."
|
||
(interactive)
|
||
;; Do nothing if within a string or in a CPP directive.
|
||
(if (or (pascal-within-string)
|
||
(and (not (bolp))
|
||
(save-excursion (beginning-of-line) (eq (following-char) ?#))))
|
||
(insert "\t")
|
||
;; If pascal-tab-always-indent, indent the beginning of the line.
|
||
(if pascal-tab-always-indent
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(pascal-indent-line))
|
||
(if (save-excursion
|
||
(skip-chars-backward " \t")
|
||
(bolp))
|
||
(pascal-indent-line)
|
||
(insert "\t")))
|
||
(pascal-indent-command)))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Interactive functions
|
||
;;;
|
||
(defun pascal-insert-block ()
|
||
"Insert Pascal begin ... end; block in the code with right indentation."
|
||
(interactive)
|
||
(insert "begin")
|
||
(electric-pascal-terminate-line)
|
||
(save-excursion
|
||
(newline)
|
||
(insert "end;")
|
||
(beginning-of-line)
|
||
(pascal-indent-line)))
|
||
|
||
(defun pascal-star-comment ()
|
||
"Insert Pascal star comment at point."
|
||
(interactive)
|
||
(pascal-indent-line)
|
||
(insert "(*")
|
||
(electric-pascal-terminate-line)
|
||
(save-excursion
|
||
(electric-pascal-terminate-line)
|
||
(delete-horizontal-space)
|
||
(insert ")"))
|
||
(insert " "))
|
||
|
||
(defun pascal-mark-defun ()
|
||
"Mark the current pascal function (or procedure).
|
||
This puts the mark at the end, and point at the beginning."
|
||
(interactive)
|
||
(push-mark (point))
|
||
(pascal-end-of-defun)
|
||
(push-mark (point))
|
||
(pascal-beg-of-defun)
|
||
(if (fboundp 'zmacs-activate-region)
|
||
(zmacs-activate-region)))
|
||
|
||
(defun pascal-comment-area (start end)
|
||
"Put the region into a Pascal comment.
|
||
The comments that are in this area are \"deformed\":
|
||
`*)' becomes `!(*' and `}' becomes `!{'.
|
||
These deformed comments are returned to normal if you use
|
||
\\[pascal-uncomment-area] to undo the commenting.
|
||
|
||
The commented area starts with `pascal-exclude-str-start', and ends with
|
||
`pascal-include-str-end'. But if you change these variables,
|
||
\\[pascal-uncomment-area] won't recognize the comments."
|
||
(interactive "r")
|
||
(save-excursion
|
||
;; Insert start and endcomments
|
||
(goto-char end)
|
||
(if (and (save-excursion (skip-chars-forward " \t") (eolp))
|
||
(not (save-excursion (skip-chars-backward " \t") (bolp))))
|
||
(forward-line 1)
|
||
(beginning-of-line))
|
||
(insert pascal-exclude-str-end)
|
||
(setq end (point))
|
||
(newline)
|
||
(goto-char start)
|
||
(beginning-of-line)
|
||
(insert pascal-exclude-str-start)
|
||
(newline)
|
||
;; Replace end-comments within commented area
|
||
(goto-char end)
|
||
(save-excursion
|
||
(while (re-search-backward "\\*)" start t)
|
||
(replace-match "!(*" t t)))
|
||
(save-excursion
|
||
(while (re-search-backward "}" start t)
|
||
(replace-match "!{" t t)))))
|
||
|
||
(defun pascal-uncomment-area ()
|
||
"Uncomment a commented area; change deformed comments back to normal.
|
||
This command does nothing if the pointer is not in a commented
|
||
area. See also `pascal-comment-area'."
|
||
(interactive)
|
||
(save-excursion
|
||
(let ((start (point))
|
||
(end (point)))
|
||
;; Find the boundaries of the comment
|
||
(save-excursion
|
||
(setq start (progn (search-backward pascal-exclude-str-start nil t)
|
||
(point)))
|
||
(setq end (progn (search-forward pascal-exclude-str-end nil t)
|
||
(point))))
|
||
;; Check if we're really inside a comment
|
||
(if (or (equal start (point)) (<= end (point)))
|
||
(message "Not standing within commented area.")
|
||
(progn
|
||
;; Remove endcomment
|
||
(goto-char end)
|
||
(beginning-of-line)
|
||
(let ((pos (point)))
|
||
(end-of-line)
|
||
(delete-region pos (1+ (point))))
|
||
;; Change comments back to normal
|
||
(save-excursion
|
||
(while (re-search-backward "!{" start t)
|
||
(replace-match "}" t t)))
|
||
(save-excursion
|
||
(while (re-search-backward "!(\\*" start t)
|
||
(replace-match "*)" t t)))
|
||
;; Remove startcomment
|
||
(goto-char start)
|
||
(beginning-of-line)
|
||
(let ((pos (point)))
|
||
(end-of-line)
|
||
(delete-region pos (1+ (point)))))))))
|
||
|
||
(defun pascal-beg-of-defun ()
|
||
"Move backward to the beginning of the current function or procedure."
|
||
(interactive)
|
||
(catch 'found
|
||
(if (not (looking-at (concat "\\s \\|\\s)\\|" pascal-defun-re)))
|
||
(forward-sexp 1))
|
||
(let ((nest 0) (max -1) (func 0)
|
||
(reg (concat pascal-beg-block-re "\\|"
|
||
pascal-end-block-re "\\|"
|
||
pascal-defun-re)))
|
||
(while (re-search-backward reg nil 'move)
|
||
(cond ((let ((state (save-excursion
|
||
(parse-partial-sexp (point-min) (point)))))
|
||
(or (nth 3 state) (nth 4 state))) ; Inside string or comment
|
||
())
|
||
((match-end 1) ; begin|case|record|repeat
|
||
(if (and (looking-at "\\<record\\>") (>= max 0))
|
||
(setq func (1- func)))
|
||
(setq nest (1+ nest)
|
||
max (max nest max)))
|
||
((match-end 2) ; end|until
|
||
(if (and (= nest max) (>= max 0))
|
||
(setq func (1+ func)))
|
||
(setq nest (1- nest)))
|
||
((match-end 3) ; function|procedure
|
||
(if (= 0 func)
|
||
(throw 'found t)
|
||
(setq func (1- func)))))))
|
||
nil))
|
||
|
||
(defun pascal-end-of-defun ()
|
||
"Move forward to the end of the current function or procedure."
|
||
(interactive)
|
||
(if (looking-at "\\s ")
|
||
(forward-sexp 1))
|
||
(if (not (looking-at pascal-defun-re))
|
||
(pascal-beg-of-defun))
|
||
(forward-char 1)
|
||
(let ((nest 0) (func 1)
|
||
(reg (concat pascal-beg-block-re "\\|"
|
||
pascal-end-block-re "\\|"
|
||
pascal-defun-re)))
|
||
(while (and (/= func 0)
|
||
(re-search-forward reg nil 'move))
|
||
(cond ((let ((state (save-excursion
|
||
(parse-partial-sexp (point-min) (point)))))
|
||
(or (nth 3 state) (nth 4 state))) ; Inside string or comment
|
||
())
|
||
((match-end 1)
|
||
(setq nest (1+ nest))
|
||
(if (save-excursion
|
||
(goto-char (match-beginning 0))
|
||
(looking-at "\\<record\\>"))
|
||
(setq func (1+ func))))
|
||
((match-end 2)
|
||
(setq nest (1- nest))
|
||
(if (= nest 0)
|
||
(setq func (1- func))))
|
||
((match-end 3)
|
||
(setq func (1+ func))))))
|
||
(forward-line 1))
|
||
|
||
(defun pascal-end-of-statement ()
|
||
"Move forward to end of current statement."
|
||
(interactive)
|
||
(let ((parse-sexp-ignore-comments t)
|
||
(nest 0) pos
|
||
(regexp (concat "\\(" pascal-beg-block-re "\\)\\|\\("
|
||
pascal-end-block-re "\\)")))
|
||
(if (not (looking-at "[ \t\n]")) (forward-sexp -1))
|
||
(or (looking-at pascal-beg-block-re)
|
||
;; Skip to end of statement
|
||
(setq pos (catch 'found
|
||
(while t
|
||
(forward-sexp 1)
|
||
(cond ((looking-at "[ \t]*;")
|
||
(skip-chars-forward "^;")
|
||
(forward-char 1)
|
||
(throw 'found (point)))
|
||
((save-excursion
|
||
(forward-sexp -1)
|
||
(looking-at pascal-beg-block-re))
|
||
(goto-char (match-beginning 0))
|
||
(throw 'found nil))
|
||
((eobp)
|
||
(throw 'found (point))))))))
|
||
(if (not pos)
|
||
;; Skip a whole block
|
||
(catch 'found
|
||
(while t
|
||
(re-search-forward regexp nil 'move)
|
||
(setq nest (if (match-end 1)
|
||
(1+ nest)
|
||
(1- nest)))
|
||
(cond ((eobp)
|
||
(throw 'found (point)))
|
||
((= 0 nest)
|
||
(throw 'found (pascal-end-of-statement))))))
|
||
pos)))
|
||
|
||
(defun pascal-downcase-keywords ()
|
||
"Downcase all Pascal keywords in the buffer."
|
||
(interactive)
|
||
(pascal-change-keywords 'downcase-word))
|
||
|
||
(defun pascal-upcase-keywords ()
|
||
"Upcase all Pascal keywords in the buffer."
|
||
(interactive)
|
||
(pascal-change-keywords 'upcase-word))
|
||
|
||
(defun pascal-capitalize-keywords ()
|
||
"Capitalize all Pascal keywords in the buffer."
|
||
(interactive)
|
||
(pascal-change-keywords 'capitalize-word))
|
||
|
||
;; Change the keywords according to argument.
|
||
(defun pascal-change-keywords (change-word)
|
||
(save-excursion
|
||
(let ((keyword-re (concat "\\<\\("
|
||
(mapconcat 'identity pascal-keywords "\\|")
|
||
"\\)\\>")))
|
||
(goto-char (point-min))
|
||
(while (re-search-forward keyword-re nil t)
|
||
(funcall change-word -1)))))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Other functions
|
||
;;;
|
||
(defun pascal-set-auto-comments ()
|
||
"Insert `{ case }' or `{ NAME }' on this line if appropriate.
|
||
Insert `{ case }' if there is an `end' on the line which
|
||
ends a case block. Insert `{ NAME }' if there is an `end'
|
||
on the line which ends a function or procedure named NAME."
|
||
(save-excursion
|
||
(forward-line -1)
|
||
(skip-chars-forward " \t")
|
||
(if (and (looking-at "\\<end;")
|
||
(not (save-excursion
|
||
(end-of-line)
|
||
(search-backward "{" (pascal-get-beg-of-line) t))))
|
||
(let ((type (car (pascal-calculate-indent))))
|
||
(if (eq type 'declaration)
|
||
()
|
||
(if (eq type 'case)
|
||
;; This is a case block
|
||
(progn
|
||
(end-of-line)
|
||
(delete-horizontal-space)
|
||
(insert " { case }"))
|
||
(let ((nest 1))
|
||
;; Check if this is the end of a function
|
||
(save-excursion
|
||
(while (not (or (looking-at pascal-defun-re) (bobp)))
|
||
(backward-sexp 1)
|
||
(cond ((looking-at pascal-beg-block-re)
|
||
(setq nest (1- nest)))
|
||
((looking-at pascal-end-block-re)
|
||
(setq nest (1+ nest)))))
|
||
(if (bobp)
|
||
(setq nest 1)))
|
||
(if (zerop nest)
|
||
(progn
|
||
(end-of-line)
|
||
(delete-horizontal-space)
|
||
(insert " { ")
|
||
(let (b e)
|
||
(save-excursion
|
||
(setq b (progn (pascal-beg-of-defun)
|
||
(skip-chars-forward "^ \t")
|
||
(skip-chars-forward " \t")
|
||
(point))
|
||
e (progn (skip-chars-forward "a-zA-Z0-9_")
|
||
(point))))
|
||
(insert-buffer-substring (current-buffer) b e))
|
||
(insert " }"))))))))))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Indentation
|
||
;;;
|
||
(defconst pascal-indent-alist
|
||
'((block . (+ ind pascal-indent-level))
|
||
(case . (+ ind pascal-case-indent))
|
||
(caseblock . ind) (cpp . 0)
|
||
(declaration . (+ ind pascal-indent-level))
|
||
(paramlist . (pascal-indent-paramlist t))
|
||
(comment . (pascal-indent-comment))
|
||
(defun . ind) (contexp . ind)
|
||
(unknown . ind) (string . 0) (progbeg . 0)))
|
||
|
||
(defun pascal-indent-command ()
|
||
"Indent for special part of code."
|
||
(let* ((indent-str (pascal-calculate-indent))
|
||
(type (car indent-str))
|
||
(ind (car (cdr indent-str))))
|
||
(cond ((and (eq type 'paramlist)
|
||
(or (memq 'all pascal-auto-lineup)
|
||
(memq 'paramlist pascal-auto-lineup)))
|
||
(pascal-indent-paramlist)
|
||
(pascal-indent-paramlist))
|
||
((and (eq type 'declaration)
|
||
(or (memq 'all pascal-auto-lineup)
|
||
(memq 'declaration pascal-auto-lineup)))
|
||
(pascal-indent-declaration))
|
||
((and (eq type 'case) (not (looking-at "^[ \t]*$"))
|
||
(or (memq 'all pascal-auto-lineup)
|
||
(memq 'case pascal-auto-lineup)))
|
||
(pascal-indent-case)))
|
||
(if (looking-at "[ \t]+$")
|
||
(skip-chars-forward " \t"))))
|
||
|
||
(defun pascal-indent-line ()
|
||
"Indent current line as a Pascal statement."
|
||
(let* ((indent-str (pascal-calculate-indent))
|
||
(type (car indent-str))
|
||
(ind (car (cdr indent-str))))
|
||
;; Labels should not be indented.
|
||
(if (and (looking-at "^[0-9a-zA-Z]+[ \t]*:[^=]")
|
||
(not (eq type 'declaration)))
|
||
(search-forward ":" nil t))
|
||
(delete-horizontal-space)
|
||
(cond (; Some things should not be indented
|
||
(or (and (eq type 'declaration) (looking-at pascal-declaration-re))
|
||
(eq type 'cpp))
|
||
())
|
||
(; Other things should have no extra indent
|
||
(looking-at pascal-noindent-re)
|
||
(indent-to ind))
|
||
(; Nested functions should be indented
|
||
(looking-at pascal-defun-re)
|
||
(if (and pascal-indent-nested-functions
|
||
(eq type 'defun))
|
||
(indent-to (+ ind pascal-indent-level))
|
||
(indent-to ind)))
|
||
(; But most lines are treated this way
|
||
(indent-to (eval (cdr (assoc type pascal-indent-alist))))
|
||
))))
|
||
|
||
(defun pascal-calculate-indent ()
|
||
"Calculate the indent of the current Pascal line.
|
||
Return a list of two elements: (INDENT-TYPE INDENT-LEVEL)."
|
||
(save-excursion
|
||
(let* ((parse-sexp-ignore-comments t)
|
||
(oldpos (point))
|
||
(state (save-excursion (parse-partial-sexp (point-min) (point))))
|
||
(nest 0) (par 0) (complete (looking-at "[ \t]*end\\>"))
|
||
(elsed (looking-at "[ \t]*else\\>")) (funccnt 0)
|
||
(did-func (looking-at "[ \t]*\\(procedure\\|function\\)\\>"))
|
||
(type (catch 'nesting
|
||
;; Check if inside a string, comment or parenthesis
|
||
(cond ((nth 3 state) (throw 'nesting 'string))
|
||
((nth 4 state) (throw 'nesting 'comment))
|
||
((> (car state) 0)
|
||
(goto-char (scan-lists (point) -1 (car state)))
|
||
(setq par (1+ (current-column))))
|
||
((save-excursion (beginning-of-line)
|
||
(eq (following-char) ?#))
|
||
(throw 'nesting 'cpp)))
|
||
;; Loop until correct indent is found
|
||
(while t
|
||
(backward-sexp 1)
|
||
(cond (;--Escape from case statements
|
||
(and (looking-at "[A-Za-z0-9]+[ \t]*:[^=]")
|
||
(not complete)
|
||
(save-excursion (skip-chars-backward " \t")
|
||
(bolp))
|
||
(= (save-excursion
|
||
(end-of-line) (backward-sexp) (point))
|
||
(point))
|
||
(> (save-excursion (goto-char oldpos)
|
||
(beginning-of-line)
|
||
(point))
|
||
(point)))
|
||
(throw 'nesting 'caseblock))
|
||
(;--Beginning of program
|
||
(looking-at pascal-progbeg-re)
|
||
(throw 'nesting 'progbeg))
|
||
(;--No known statements
|
||
(bobp)
|
||
(throw 'nesting 'progbeg))
|
||
(;--Nest block outwards
|
||
(looking-at pascal-beg-block-re)
|
||
(if (= nest 0)
|
||
(cond ((looking-at "case\\>")
|
||
(throw 'nesting 'case))
|
||
((looking-at "record\\>")
|
||
(throw 'nesting 'declaration))
|
||
(t (throw 'nesting 'block)))
|
||
(if (and (looking-at "record\\>") (= nest 1))
|
||
(setq funccnt (1- funccnt)))
|
||
(setq nest (1- nest))))
|
||
(;--Nest block inwards
|
||
(looking-at pascal-end-block-re)
|
||
(if (and (looking-at "end\\s ")
|
||
elsed (not complete))
|
||
(throw 'nesting 'block))
|
||
(if (= nest 0)
|
||
(setq funccnt (1+ funccnt)))
|
||
(setq complete t
|
||
nest (1+ nest)))
|
||
(;--Defun (or parameter list)
|
||
(and (looking-at pascal-defun-re)
|
||
(progn (setq funccnt (1- funccnt)
|
||
did-func t)
|
||
(or (bolp) (< funccnt 0))))
|
||
;; Prevent searching whole buffer
|
||
(if (and (bolp) (>= funccnt 0))
|
||
(throw 'nesting 'progbeg))
|
||
(if (= 0 par)
|
||
(throw 'nesting 'defun)
|
||
(setq par 0)
|
||
(let ((n 0))
|
||
(while (re-search-forward
|
||
"\\(\\<record\\>\\)\\|\\<end\\>"
|
||
oldpos t)
|
||
(if (match-end 1)
|
||
(setq n (1+ n)) (setq n (1- n))))
|
||
(if (> n 0)
|
||
(throw 'nesting 'declaration)
|
||
(throw 'nesting 'paramlist)))))
|
||
(;--Declaration part
|
||
(and (looking-at pascal-declaration-re)
|
||
(not did-func)
|
||
(= funccnt 0))
|
||
(if (save-excursion
|
||
(goto-char oldpos)
|
||
(forward-line -1)
|
||
(looking-at "^[ \t]*$"))
|
||
(throw 'nesting 'unknown)
|
||
(throw 'nesting 'declaration)))
|
||
(;--If, else or while statement
|
||
(and (not complete)
|
||
(looking-at pascal-sub-block-re))
|
||
(throw 'nesting 'block))
|
||
(;--Found complete statement
|
||
(save-excursion (forward-sexp 1)
|
||
(= (following-char) ?\;))
|
||
(setq complete t))
|
||
)))))
|
||
|
||
;; Return type of block and indent level.
|
||
(if (> par 0) ; Unclosed Parenthesis
|
||
(list 'contexp par)
|
||
(list type (pascal-indent-level))))))
|
||
|
||
(defun pascal-indent-level ()
|
||
"Return the indent-level the current statement has.
|
||
Do not count labels, case-statements or records."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(if (looking-at "[ \t]*[0-9a-zA-Z]+[ \t]*:[^=]")
|
||
(search-forward ":" nil t)
|
||
(if (looking-at ".*=[ \t]*record\\>")
|
||
(search-forward "=" nil t)))
|
||
(skip-chars-forward " \t")
|
||
(current-column)))
|
||
|
||
(defun pascal-indent-comment ()
|
||
"Return indent for current comment."
|
||
(save-excursion
|
||
(re-search-backward "\\((\\*\\)\\|{" nil t)
|
||
(if (match-beginning 1)
|
||
(1+ (current-column))
|
||
(current-column))))
|
||
|
||
(defun pascal-indent-case ()
|
||
"Indent within case statements."
|
||
(let ((savepos (point-marker))
|
||
(end (prog2
|
||
(end-of-line)
|
||
(point-marker)
|
||
(re-search-backward "\\<case\\>" nil t)))
|
||
(beg (point)) oldpos
|
||
(ind 0))
|
||
;; Get right indent
|
||
(while (< (point) end)
|
||
(if (re-search-forward
|
||
"^[ \t]*[^ \t,:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
|
||
(marker-position end) 'move)
|
||
(forward-char -1))
|
||
(if (< (point) end)
|
||
(progn
|
||
(delete-horizontal-space)
|
||
(if (> (current-column) ind)
|
||
(setq ind (current-column)))
|
||
(pascal-end-of-statement))))
|
||
(goto-char beg)
|
||
(setq oldpos (marker-position end))
|
||
;; Indent all case statements
|
||
(while (< (point) end)
|
||
(if (re-search-forward
|
||
"^[ \t]*[^][ \t,\\.:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
|
||
(marker-position end) 'move)
|
||
(forward-char -1))
|
||
(indent-to (1+ ind))
|
||
(if (/= (following-char) ?:)
|
||
()
|
||
(forward-char 1)
|
||
(delete-horizontal-space)
|
||
(insert " "))
|
||
(setq oldpos (point))
|
||
(pascal-end-of-statement))
|
||
(goto-char savepos)))
|
||
|
||
(defun pascal-indent-paramlist (&optional arg)
|
||
"Indent current line in parameterlist.
|
||
If optional arg is non-nil, just return the
|
||
indent of the current line in parameterlist."
|
||
(save-excursion
|
||
(let* ((oldpos (point))
|
||
(stpos (progn (goto-char (scan-lists (point) -1 1)) (point)))
|
||
(stcol (1+ (current-column)))
|
||
(edpos (progn (pascal-declaration-end)
|
||
(search-backward ")" (pascal-get-beg-of-line) t)
|
||
(point)))
|
||
(usevar (re-search-backward "\\<var\\>" stpos t)))
|
||
(if arg (progn
|
||
;; If arg, just return indent
|
||
(goto-char oldpos)
|
||
(beginning-of-line)
|
||
(if (or (not usevar) (looking-at "[ \t]*var\\>"))
|
||
stcol (+ 4 stcol)))
|
||
(goto-char stpos)
|
||
(forward-char 1)
|
||
(delete-horizontal-space)
|
||
(if (and usevar (not (looking-at "var\\>")))
|
||
(indent-to (+ 4 stcol)))
|
||
(pascal-indent-declaration nil stpos edpos)))))
|
||
|
||
(defun pascal-indent-declaration (&optional arg start end)
|
||
"Indent current lines as declaration, lining up the `:'s or `='s."
|
||
(let ((pos (point-marker)))
|
||
(if (and (not (or arg start)) (not (pascal-declaration-beg)))
|
||
()
|
||
(let ((lineup (if (or (looking-at "\\<var\\>\\|\\<record\\>") arg start)
|
||
":" "="))
|
||
(stpos (if start start
|
||
(forward-word 2) (backward-word 1) (point)))
|
||
(edpos (set-marker (make-marker)
|
||
(if end end
|
||
(max (progn (pascal-declaration-end)
|
||
(point))
|
||
pos))))
|
||
ind)
|
||
|
||
(goto-char stpos)
|
||
;; Indent lines in record block
|
||
(if arg
|
||
(while (<= (point) edpos)
|
||
(beginning-of-line)
|
||
(delete-horizontal-space)
|
||
(if (looking-at "end\\>")
|
||
(indent-to arg)
|
||
(indent-to (+ arg pascal-indent-level)))
|
||
(forward-line 1)))
|
||
|
||
;; Do lineup
|
||
(setq ind (pascal-get-lineup-indent stpos edpos lineup))
|
||
(goto-char stpos)
|
||
(while (and (<= (point) edpos) (not (eobp)))
|
||
(if (search-forward lineup (pascal-get-end-of-line) 'move)
|
||
(forward-char -1))
|
||
(delete-horizontal-space)
|
||
(indent-to ind)
|
||
(if (not (looking-at lineup))
|
||
(forward-line 1) ; No more indent if there is no : or =
|
||
(forward-char 1)
|
||
(delete-horizontal-space)
|
||
(insert " ")
|
||
;; Indent record block
|
||
(if (looking-at "record\\>")
|
||
(pascal-indent-declaration (current-column)))
|
||
(forward-line 1)))))
|
||
|
||
;; If arg - move point
|
||
(if arg (forward-line -1)
|
||
(goto-char pos))))
|
||
|
||
; "Return the indent level that will line up several lines within the region
|
||
;from b to e nicely. The lineup string is str."
|
||
(defun pascal-get-lineup-indent (b e str)
|
||
(save-excursion
|
||
(let ((ind 0)
|
||
(reg (concat str "\\|\\(\\<record\\>\\)\\|" pascal-defun-re)))
|
||
(goto-char b)
|
||
;; Get rightmost position
|
||
(while (< (point) e)
|
||
(and (re-search-forward reg (min e (pascal-get-end-of-line 2)) 'move)
|
||
(cond ((match-beginning 1)
|
||
;; Skip record blocks
|
||
(pascal-declaration-end))
|
||
((match-beginning 2)
|
||
;; We have entered a new procedure. Exit.
|
||
(goto-char e))
|
||
(t
|
||
(goto-char (match-beginning 0))
|
||
(skip-chars-backward " \t")
|
||
(if (> (current-column) ind)
|
||
(setq ind (current-column)))
|
||
(goto-char (match-end 0))
|
||
(end-of-line)
|
||
))))
|
||
;; In case no lineup was found
|
||
(if (> ind 0)
|
||
(1+ ind)
|
||
;; No lineup-string found
|
||
(goto-char b)
|
||
(end-of-line)
|
||
(skip-chars-backward " \t")
|
||
(1+ (current-column))))))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Completion
|
||
;;;
|
||
(defvar pascal-str nil)
|
||
(defvar pascal-all nil)
|
||
(defvar pascal-pred nil)
|
||
(defvar pascal-buffer-to-use nil)
|
||
(defvar pascal-flag nil)
|
||
|
||
(defun pascal-string-diff (str1 str2)
|
||
"Return index of first letter where STR1 and STR2 differs."
|
||
(catch 'done
|
||
(let ((diff 0))
|
||
(while t
|
||
(if (or (> (1+ diff) (length str1))
|
||
(> (1+ diff) (length str2)))
|
||
(throw 'done diff))
|
||
(or (equal (aref str1 diff) (aref str2 diff))
|
||
(throw 'done diff))
|
||
(setq diff (1+ diff))))))
|
||
|
||
;; Calculate all possible completions for functions if argument is `function',
|
||
;; completions for procedures if argument is `procedure' or both functions and
|
||
;; procedures otherwise.
|
||
|
||
(defun pascal-func-completion (type)
|
||
;; Build regular expression for function/procedure names
|
||
(if (string= pascal-str "")
|
||
(setq pascal-str "[a-zA-Z_]"))
|
||
(let ((pascal-str (concat (cond
|
||
((eq type 'procedure) "\\<\\(procedure\\)\\s +")
|
||
((eq type 'function) "\\<\\(function\\)\\s +")
|
||
(t "\\<\\(function\\|procedure\\)\\s +"))
|
||
"\\<\\(" pascal-str "[a-zA-Z0-9_.]*\\)\\>"))
|
||
match)
|
||
|
||
(if (not (looking-at "\\<\\(function\\|procedure\\)\\>"))
|
||
(re-search-backward "\\<\\(function\\|procedure\\)\\>" nil t))
|
||
(forward-char 1)
|
||
|
||
;; Search through all reachable functions
|
||
(while (pascal-beg-of-defun)
|
||
(if (re-search-forward pascal-str (pascal-get-end-of-line) t)
|
||
(progn (setq match (buffer-substring (match-beginning 2)
|
||
(match-end 2)))
|
||
(if (or (null pascal-pred)
|
||
(funcall pascal-pred match))
|
||
(setq pascal-all (cons match pascal-all)))))
|
||
(goto-char (match-beginning 0)))))
|
||
|
||
(defun pascal-get-completion-decl ()
|
||
;; Macro for searching through current declaration (var, type or const)
|
||
;; for matches of `str' and adding the occurrence to `all'
|
||
(let ((end (save-excursion (pascal-declaration-end)
|
||
(point)))
|
||
match)
|
||
;; Traverse lines
|
||
(while (< (point) end)
|
||
(if (re-search-forward "[:=]" (pascal-get-end-of-line) t)
|
||
;; Traverse current line
|
||
(while (and (re-search-backward
|
||
(concat "\\((\\|\\<\\(var\\|type\\|const\\)\\>\\)\\|"
|
||
pascal-symbol-re)
|
||
(pascal-get-beg-of-line) t)
|
||
(not (match-end 1)))
|
||
(setq match (buffer-substring (match-beginning 0) (match-end 0)))
|
||
(if (string-match (concat "\\<" pascal-str) match)
|
||
(if (or (null pascal-pred)
|
||
(funcall pascal-pred match))
|
||
(setq pascal-all (cons match pascal-all))))))
|
||
(if (re-search-forward "\\<record\\>" (pascal-get-end-of-line) t)
|
||
(pascal-declaration-end)
|
||
(forward-line 1)))))
|
||
|
||
(defun pascal-type-completion ()
|
||
"Calculate all possible completions for types."
|
||
(let ((start (point))
|
||
goon)
|
||
;; Search for all reachable type declarations
|
||
(while (or (pascal-beg-of-defun)
|
||
(setq goon (not goon)))
|
||
(save-excursion
|
||
(if (and (< start (prog1 (save-excursion (pascal-end-of-defun)
|
||
(point))
|
||
(forward-char 1)))
|
||
(re-search-forward
|
||
"\\<type\\>\\|\\<\\(begin\\|function\\|procedure\\)\\>"
|
||
start t)
|
||
(not (match-end 1)))
|
||
;; Check current type declaration
|
||
(pascal-get-completion-decl))))))
|
||
|
||
(defun pascal-var-completion ()
|
||
"Calculate all possible completions for variables (or constants)."
|
||
(let ((start (point))
|
||
goon twice)
|
||
;; Search for all reachable var declarations
|
||
(while (or (pascal-beg-of-defun)
|
||
(setq goon (not goon)))
|
||
(save-excursion
|
||
(if (> start (prog1 (save-excursion (pascal-end-of-defun)
|
||
(point))))
|
||
() ; Declarations not reachable
|
||
(if (search-forward "(" (pascal-get-end-of-line) t)
|
||
;; Check parameterlist
|
||
(pascal-get-completion-decl))
|
||
(setq twice 2)
|
||
(while (>= (setq twice (1- twice)) 0)
|
||
(cond ((and (re-search-forward
|
||
(concat "\\<\\(var\\|const\\)\\>\\|"
|
||
"\\<\\(begin\\|function\\|procedure\\)\\>")
|
||
start t)
|
||
(not (match-end 2)))
|
||
;; Check var/const declarations
|
||
(pascal-get-completion-decl))
|
||
((match-end 2)
|
||
(setq twice 0)))))))))
|
||
|
||
|
||
(defun pascal-keyword-completion (keyword-list)
|
||
"Give list of all possible completions of keywords in KEYWORD-LIST."
|
||
(mapcar '(lambda (s)
|
||
(if (string-match (concat "\\<" pascal-str) s)
|
||
(if (or (null pascal-pred)
|
||
(funcall pascal-pred s))
|
||
(setq pascal-all (cons s pascal-all)))))
|
||
keyword-list))
|
||
|
||
;; Function passed to completing-read, try-completion or
|
||
;; all-completions to get completion on STR. If predicate is non-nil,
|
||
;; it must be a function to be called for every match to check if this
|
||
;; should really be a match. If flag is t, the function returns a list
|
||
;; of all possible completions. If it is nil it returns a string, the
|
||
;; longest possible completion, or t if STR is an exact match. If flag
|
||
;; is 'lambda, the function returns t if STR is an exact match, nil
|
||
;; otherwise.
|
||
|
||
(defun pascal-completion (pascal-str pascal-pred pascal-flag)
|
||
(save-excursion
|
||
(let ((pascal-all nil))
|
||
;; Set buffer to use for searching labels. This should be set
|
||
;; within functions which use pascal-completions
|
||
(set-buffer pascal-buffer-to-use)
|
||
|
||
;; Determine what should be completed
|
||
(let ((state (car (pascal-calculate-indent))))
|
||
(cond (;--Within a declaration or parameterlist
|
||
(or (eq state 'declaration) (eq state 'paramlist)
|
||
(and (eq state 'defun)
|
||
(save-excursion
|
||
(re-search-backward ")[ \t]*:"
|
||
(pascal-get-beg-of-line) t))))
|
||
(if (or (eq state 'paramlist) (eq state 'defun))
|
||
(pascal-beg-of-defun))
|
||
(pascal-type-completion)
|
||
(pascal-keyword-completion pascal-type-keywords))
|
||
(;--Starting a new statement
|
||
(and (not (eq state 'contexp))
|
||
(save-excursion
|
||
(skip-chars-backward "a-zA-Z0-9_.")
|
||
(backward-sexp 1)
|
||
(or (looking-at pascal-nosemi-re)
|
||
(progn
|
||
(forward-sexp 1)
|
||
(looking-at "\\s *\\(;\\|:[^=]\\)")))))
|
||
(save-excursion (pascal-var-completion))
|
||
(pascal-func-completion 'procedure)
|
||
(pascal-keyword-completion pascal-start-keywords))
|
||
(t;--Anywhere else
|
||
(save-excursion (pascal-var-completion))
|
||
(pascal-func-completion 'function)
|
||
(pascal-keyword-completion pascal-separator-keywords))))
|
||
|
||
;; Now we have built a list of all matches. Give response to caller
|
||
(pascal-completion-response))))
|
||
|
||
(defun pascal-completion-response ()
|
||
(cond ((or (equal pascal-flag 'lambda) (null pascal-flag))
|
||
;; This was not called by all-completions
|
||
(if (null pascal-all)
|
||
;; Return nil if there was no matching label
|
||
nil
|
||
;; Get longest string common in the labels
|
||
(let* ((elm (cdr pascal-all))
|
||
(match (car pascal-all))
|
||
(min (length match))
|
||
tmp)
|
||
(if (string= match pascal-str)
|
||
;; Return t if first match was an exact match
|
||
(setq match t)
|
||
(while (not (null elm))
|
||
;; Find longest common string
|
||
(if (< (setq tmp (pascal-string-diff match (car elm))) min)
|
||
(progn
|
||
(setq min tmp)
|
||
(setq match (substring match 0 min))))
|
||
;; Terminate with match=t if this is an exact match
|
||
(if (string= (car elm) pascal-str)
|
||
(progn
|
||
(setq match t)
|
||
(setq elm nil))
|
||
(setq elm (cdr elm)))))
|
||
;; If this is a test just for exact match, return nil ot t
|
||
(if (and (equal pascal-flag 'lambda) (not (equal match 't)))
|
||
nil
|
||
match))))
|
||
;; If flag is t, this was called by all-completions. Return
|
||
;; list of all possible completions
|
||
(pascal-flag
|
||
pascal-all)))
|
||
|
||
(defvar pascal-last-word-numb 0)
|
||
(defvar pascal-last-word-shown nil)
|
||
(defvar pascal-last-completions nil)
|
||
|
||
(defun pascal-complete-word ()
|
||
"Complete word at current point.
|
||
\(See also `pascal-toggle-completions', `pascal-type-keywords',
|
||
`pascal-start-keywords' and `pascal-separator-keywords'.)"
|
||
(interactive)
|
||
(let* ((b (save-excursion (skip-chars-backward "a-zA-Z0-9_") (point)))
|
||
(e (save-excursion (skip-chars-forward "a-zA-Z0-9_") (point)))
|
||
(pascal-str (buffer-substring b e))
|
||
;; The following variable is used in pascal-completion
|
||
(pascal-buffer-to-use (current-buffer))
|
||
(allcomp (if (and pascal-toggle-completions
|
||
(string= pascal-last-word-shown pascal-str))
|
||
pascal-last-completions
|
||
(all-completions pascal-str 'pascal-completion)))
|
||
(match (if pascal-toggle-completions
|
||
"" (try-completion
|
||
pascal-str (mapcar '(lambda (elm)
|
||
(cons elm 0)) allcomp)))))
|
||
;; Delete old string
|
||
(delete-region b e)
|
||
|
||
;; Toggle-completions inserts whole labels
|
||
(if pascal-toggle-completions
|
||
(progn
|
||
;; Update entry number in list
|
||
(setq pascal-last-completions allcomp
|
||
pascal-last-word-numb
|
||
(if (>= pascal-last-word-numb (1- (length allcomp)))
|
||
0
|
||
(1+ pascal-last-word-numb)))
|
||
(setq pascal-last-word-shown (elt allcomp pascal-last-word-numb))
|
||
;; Display next match or same string if no match was found
|
||
(if (not (null allcomp))
|
||
(insert "" pascal-last-word-shown)
|
||
(insert "" pascal-str)
|
||
(message "(No match)")))
|
||
;; The other form of completion does not necessarily do that.
|
||
|
||
;; Insert match if found, or the original string if no match
|
||
(if (or (null match) (equal match 't))
|
||
(progn (insert "" pascal-str)
|
||
(message "(No match)"))
|
||
(insert "" match))
|
||
;; Give message about current status of completion
|
||
(cond ((equal match 't)
|
||
(if (not (null (cdr allcomp)))
|
||
(message "(Complete but not unique)")
|
||
(message "(Sole completion)")))
|
||
;; Display buffer if the current completion didn't help
|
||
;; on completing the label.
|
||
((and (not (null (cdr allcomp))) (= (length pascal-str)
|
||
(length match)))
|
||
(with-output-to-temp-buffer "*Completions*"
|
||
(display-completion-list allcomp))
|
||
;; Wait for a keypress. Then delete *Completion* window
|
||
(momentary-string-display "" (point))
|
||
(delete-window (get-buffer-window (get-buffer "*Completions*")))
|
||
)))))
|
||
|
||
(defun pascal-show-completions ()
|
||
"Show all possible completions at current point."
|
||
(interactive)
|
||
(let* ((b (save-excursion (skip-chars-backward "a-zA-Z0-9_") (point)))
|
||
(e (save-excursion (skip-chars-forward "a-zA-Z0-9_") (point)))
|
||
(pascal-str (buffer-substring b e))
|
||
;; The following variable is used in pascal-completion
|
||
(pascal-buffer-to-use (current-buffer))
|
||
(allcomp (if (and pascal-toggle-completions
|
||
(string= pascal-last-word-shown pascal-str))
|
||
pascal-last-completions
|
||
(all-completions pascal-str 'pascal-completion))))
|
||
;; Show possible completions in a temporary buffer.
|
||
(with-output-to-temp-buffer "*Completions*"
|
||
(display-completion-list allcomp))
|
||
;; Wait for a keypress. Then delete *Completion* window
|
||
(momentary-string-display "" (point))
|
||
(delete-window (get-buffer-window (get-buffer "*Completions*")))))
|
||
|
||
|
||
(defun pascal-get-default-symbol ()
|
||
"Return symbol around current point as a string."
|
||
(save-excursion
|
||
(buffer-substring (progn
|
||
(skip-chars-backward " \t")
|
||
(skip-chars-backward "a-zA-Z0-9_")
|
||
(point))
|
||
(progn
|
||
(skip-chars-forward "a-zA-Z0-9_")
|
||
(point)))))
|
||
|
||
(defun pascal-build-defun-re (str &optional arg)
|
||
"Return function/procedure starting with STR as regular expression.
|
||
With optional second arg non-nil, STR is the complete name of the instruction."
|
||
(if arg
|
||
(concat "^\\(function\\|procedure\\)[ \t]+\\(" str "\\)\\>")
|
||
(concat "^\\(function\\|procedure\\)[ \t]+\\(" str "[a-zA-Z0-9_]*\\)\\>")))
|
||
|
||
;; Function passed to completing-read, try-completion or
|
||
;; all-completions to get completion on any function name. If
|
||
;; predicate is non-nil, it must be a function to be called for every
|
||
;; match to check if this should really be a match. If flag is t, the
|
||
;; function returns a list of all possible completions. If it is nil
|
||
;; it returns a string, the longest possible completion, or t if STR
|
||
;; is an exact match. If flag is 'lambda, the function returns t if
|
||
;; STR is an exact match, nil otherwise.
|
||
|
||
(defun pascal-comp-defun (pascal-str pascal-pred pascal-flag)
|
||
(save-excursion
|
||
(let ((pascal-all nil)
|
||
match)
|
||
|
||
;; Set buffer to use for searching labels. This should be set
|
||
;; within functions which use pascal-completions
|
||
(set-buffer pascal-buffer-to-use)
|
||
|
||
(let ((pascal-str pascal-str))
|
||
;; Build regular expression for functions
|
||
(if (string= pascal-str "")
|
||
(setq pascal-str (pascal-build-defun-re "[a-zA-Z_]"))
|
||
(setq pascal-str (pascal-build-defun-re pascal-str)))
|
||
(goto-char (point-min))
|
||
|
||
;; Build a list of all possible completions
|
||
(while (re-search-forward pascal-str nil t)
|
||
(setq match (buffer-substring (match-beginning 2) (match-end 2)))
|
||
(if (or (null pascal-pred)
|
||
(funcall pascal-pred match))
|
||
(setq pascal-all (cons match pascal-all)))))
|
||
|
||
;; Now we have built a list of all matches. Give response to caller
|
||
(pascal-completion-response))))
|
||
|
||
(defun pascal-goto-defun ()
|
||
"Move to specified Pascal function/procedure.
|
||
The default is a name found in the buffer around point."
|
||
(interactive)
|
||
(let* ((default (pascal-get-default-symbol))
|
||
;; The following variable is used in pascal-comp-function
|
||
(pascal-buffer-to-use (current-buffer))
|
||
(default (if (pascal-comp-defun default nil 'lambda)
|
||
default ""))
|
||
(label (if (not (string= default ""))
|
||
;; Do completion with default
|
||
(completing-read (concat "Label: (default " default ") ")
|
||
'pascal-comp-defun nil t "")
|
||
;; There is no default value. Complete without it
|
||
(completing-read "Label: "
|
||
'pascal-comp-defun nil t ""))))
|
||
;; If there was no response on prompt, use default value
|
||
(if (string= label "")
|
||
(setq label default))
|
||
;; Goto right place in buffer if label is not an empty string
|
||
(or (string= label "")
|
||
(progn
|
||
(goto-char (point-min))
|
||
(re-search-forward (pascal-build-defun-re label t))
|
||
(beginning-of-line)))))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Pascal-outline-mode
|
||
;;;
|
||
(defvar pascal-outline-map nil "Keymap used in Pascal Outline mode.")
|
||
|
||
(if pascal-outline-map
|
||
nil
|
||
(if (boundp 'set-keymap-name)
|
||
(set-keymap-name pascal-outline-map 'pascal-outline-map))
|
||
(if (not (boundp 'set-keymap-parent))
|
||
(setq pascal-outline-map (copy-keymap pascal-mode-map))
|
||
(setq pascal-outline-map (make-sparse-keymap))
|
||
(set-keymap-parent pascal-outline-map pascal-mode-map))
|
||
(define-key pascal-outline-map "\M-\C-a" 'pascal-outline-prev-defun)
|
||
(define-key pascal-outline-map "\M-\C-e" 'pascal-outline-next-defun)
|
||
(define-key pascal-outline-map "\C-c\C-d" 'pascal-outline-goto-defun)
|
||
(define-key pascal-outline-map "\C-c\C-s" 'pascal-show-all)
|
||
(define-key pascal-outline-map "\C-c\C-h" 'pascal-hide-other-defuns))
|
||
|
||
(defvar pascal-outline-mode nil "Non-nil while using Pascal Outline mode.")
|
||
(make-variable-buffer-local 'pascal-outline-mode)
|
||
(set-default 'pascal-outline-mode nil)
|
||
(if (not (assoc 'pascal-outline-mode minor-mode-alist))
|
||
(setq minor-mode-alist (append minor-mode-alist
|
||
(list '(pascal-outline-mode " Outl")))))
|
||
|
||
(defun pascal-outline (&optional arg)
|
||
"Outline-line minor mode for Pascal mode.
|
||
When in Pascal Outline mode, portions
|
||
of the text being edited may be made invisible. \\<pascal-outline-map>
|
||
|
||
Pascal Outline mode provides some additional commands.
|
||
|
||
\\[pascal-outline-prev-defun]\
|
||
\t- Move to previous function/procedure, hiding everything else.
|
||
\\[pascal-outline-next-defun]\
|
||
\t- Move to next function/procedure, hiding everything else.
|
||
\\[pascal-outline-goto-defun]\
|
||
\t- Goto function/procedure prompted for in minibuffer,
|
||
\t hide all other functions.
|
||
\\[pascal-show-all]\t- Show the whole buffer.
|
||
\\[pascal-hide-other-defuns]\
|
||
\t- Hide everything but the current function (function under the cursor).
|
||
\\[pascal-outline]\t- Leave pascal-outline-mode."
|
||
(interactive "P")
|
||
(setq pascal-outline-mode
|
||
(if (null arg) (not pascal-outline-mode) t))
|
||
(if (boundp 'redraw-mode-line)
|
||
(redraw-mode-line))
|
||
(if pascal-outline-mode
|
||
(progn
|
||
(setq selective-display t)
|
||
(use-local-map pascal-outline-map))
|
||
(progn
|
||
(setq selective-display nil)
|
||
(pascal-show-all)
|
||
(use-local-map pascal-mode-map))))
|
||
|
||
(defun pascal-outline-change (b e pascal-flag)
|
||
(let ((modp (buffer-modified-p)))
|
||
(unwind-protect
|
||
(subst-char-in-region b e (if (= pascal-flag ?\n)
|
||
?\^M ?\n) pascal-flag)
|
||
(set-buffer-modified-p modp))))
|
||
|
||
(defun pascal-show-all ()
|
||
"Show all of the text in the buffer."
|
||
(interactive)
|
||
(pascal-outline-change (point-min) (point-max) ?\n))
|
||
|
||
(defun pascal-hide-other-defuns ()
|
||
"Show only the current defun."
|
||
(interactive)
|
||
(save-excursion
|
||
(let ((beg (progn (if (not (looking-at "\\(function\\|procedure\\)\\>"))
|
||
(pascal-beg-of-defun))
|
||
(point)))
|
||
(end (progn (pascal-end-of-defun)
|
||
(backward-sexp 1)
|
||
(search-forward "\n\\|\^M" nil t)
|
||
(point)))
|
||
(opoint (point-min)))
|
||
(goto-char (point-min))
|
||
|
||
;; Hide all functions before current function
|
||
(while (re-search-forward "^\\(function\\|procedure\\)\\>" beg 'move)
|
||
(pascal-outline-change opoint (1- (match-beginning 0)) ?\^M)
|
||
(setq opoint (point))
|
||
;; Functions may be nested
|
||
(if (> (progn (pascal-end-of-defun) (point)) beg)
|
||
(goto-char opoint)))
|
||
(if (> beg opoint)
|
||
(pascal-outline-change opoint (1- beg) ?\^M))
|
||
|
||
;; Show current function
|
||
(pascal-outline-change beg end ?\n)
|
||
;; Hide nested functions
|
||
(forward-char 1)
|
||
(while (re-search-forward "^\\(function\\|procedure\\)\\>" end 'move)
|
||
(setq opoint (point))
|
||
(pascal-end-of-defun)
|
||
(pascal-outline-change opoint (point) ?\^M))
|
||
|
||
(goto-char end)
|
||
(setq opoint end)
|
||
|
||
;; Hide all function after current function
|
||
(while (re-search-forward "^\\(function\\|procedure\\)\\>" nil 'move)
|
||
(pascal-outline-change opoint (1- (match-beginning 0)) ?\^M)
|
||
(setq opoint (point))
|
||
(pascal-end-of-defun))
|
||
(pascal-outline-change opoint (point-max) ?\^M)
|
||
|
||
;; Hide main program
|
||
(if (< (progn (forward-line -1) (point)) end)
|
||
(progn
|
||
(goto-char beg)
|
||
(pascal-end-of-defun)
|
||
(backward-sexp 1)
|
||
(pascal-outline-change (point) (point-max) ?\^M))))))
|
||
|
||
(defun pascal-outline-next-defun ()
|
||
"Move to next function/procedure, hiding all others."
|
||
(interactive)
|
||
(pascal-end-of-defun)
|
||
(pascal-hide-other-defuns))
|
||
|
||
(defun pascal-outline-prev-defun ()
|
||
"Move to previous function/procedure, hiding all others."
|
||
(interactive)
|
||
(pascal-beg-of-defun)
|
||
(pascal-hide-other-defuns))
|
||
|
||
(defun pascal-outline-goto-defun ()
|
||
"Move to specified function/procedure, hiding all others."
|
||
(interactive)
|
||
(pascal-goto-defun)
|
||
(pascal-hide-other-defuns))
|
||
|
||
(provide 'pascal)
|
||
|
||
;;; pascal.el ends here
|