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1 ;;; rexx-mode.el --- major mode for editing REXX program files
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2 ;; Keywords: languages
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3
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4 ;; Copyright (C) 1993 by Anders Lindgren.
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5
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6 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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20 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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21
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22 ;;; Synched up with: Not in FSF.
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23
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24 ;;; AUTHOR
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25 ;;; Anders Lindgren, d91ali@csd.uu.se
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26 ;;;
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27 ;;; Abbrevationtable due to:
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28 ;;; Johan Bergkvist, nv91-jbe@nada.kth.se
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29 ;;;
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30 ;;; USAGE
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31 ;;; This file contains code for a GNU Emacs major mode for
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32 ;;; editing REXX program files.
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33 ;;;
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34 ;;; Type C-h m in Emacs for information on how to configurate
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35 ;;; the rexx-mode, or see rexx-mode.doc.
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36 ;;;
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37 ;;; Put the following lines into your .emacs and rexx-mode
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38 ;;; will be automatically loaded when editing a REXX program.
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39 ;;; If rexx-mode shall be used for files with other extensions
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40 ;;; you can create more (cons ...) lines with these extensions.
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41 ;;;
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42 ;;; (autoload 'rexx-mode "rexx-mode" "REXX mode" nil t)
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43 ;;; (setq auto-mode-alist
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44 ;;; (append
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45 ;;; (list (cons "\\.rexx$" 'rexx-mode)
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46 ;;; (cons "\\.elx$" 'rexx-mode)
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47 ;;; (cons "\\.ncomm$" 'rexx-mode)
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48 ;;; (cons "\\.cpr$" 'rexx-mode)
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49 ;;; )
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50 ;;; auto-mode-alist))
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51 ;;;
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52 ;;; HISTORY
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53 ;;; 93-01-07 V0.1 ALi Works for the first time.
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54 ;;; 92-01-11 V0.2 ALi rexx-calc-indent totally rewritten.
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55 ;;; 93-03-08 V0.3 JB rexx-indent-and-newline-and-indent added.
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56 ;;; Abbrev-table containing 173 entries created.
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57 ;;; rexx-check-expansion added.
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58 ;;; rexx-mode enables use of abbrev-table.
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59 ;;; 93-03-15 V0.4 ALi abbrev-mode removed, better to call
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60 ;;; (abbrev-mode 1) from the hook.
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61 ;;; case-fold-search set to t to recognize capital
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62 ;;; letters in keywords.
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63 ;;; Old (setq case-fold-search nil) removed which
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64 ;;; prevented the recognition of END.
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65 ;;; rexx-indent-and-newline-and-indent renamed to
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66 ;;; rexx-indent-newline-indent.
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67 ;;; rexx-i-n-i now only expands abbrevs when
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68 ;;; buffer is in abbrev-mode.
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69 ;;; New rexx-newline-and-indent added.
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70 ;;; 93-03-20 ALi A serious bug in the routine for checking
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71 ;;; strings and comments found and fixed.
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72 ;;; V1.0 Relesed!
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73 ;;;
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74
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75
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76 (provide 'rexx-mode)
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77
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78 (defconst rexx-indent 8
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79 "*This variable contains the indentation in rexx-mode.")
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80
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81 (defconst rexx-end-indent 0
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82 "*This variable indicates the relative position of the \"end\" in REXX mode.")
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83
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84 (defconst rexx-cont-indent 8
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85 "*This variable indicates how far a continued line shall be intended.")
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86
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87 (defconst rexx-comment-col 32
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88 "*This variable gives the desired comment column
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89 for comments to the right of text.")
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90
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91 (defconst rexx-tab-always-indent t
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92 "*Non-nil means TAB in REXX mode should always reindent the current line,
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93 regardless of where in the line point is when the TAB command is used.")
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94
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95 (defconst rexx-special-regexp
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96 ".*\\(,\\|then\\|else\\)[ \t]*\\(/\\*.*\\*/\\)?[ \t]*$"
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97 "*Regular expression for parsing lines which shall be followed by
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98 a extra indention")
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99
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100 (defconst rexx-font-lock-keywords
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101 (purecopy
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102 (list
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103 (cons (concat "\\<\\("
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104 (mapconcat 'identity
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105 '("address" "arg" "break" "call" "do" "drop" "echo" "else" "end"
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106 "exit" "if" "interpret" "iterate" "leave" "nop" "numeric"
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107 "options" "otherwise" "parse" "procedure" "pull" "push" "queue"
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108 "return" "say" "select" "shell" "signal" "then" "trace" "upper"
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109 "when" "value" "to" "by" "for" "forever" "while" "until" "form"
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110 "digits" "fuzz" "scientific" "engineering" "failat" "prompt"
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111 "results" "upper" "external" "source" "with" "command"
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112 "function" "var" "version" "expose" "on" "off")
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113 "\\|") "\\)\\>") 'font-lock-keyword-face)
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114 '("\\(\\sw+\\):" 1 font-lock-function-name-face)))
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115 "Additional expressions to highlight in Rexx mode.")
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116 (put 'rexx-mode 'font-lock-defaults '(rexx-font-lock-keywords))
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117
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118 (defvar rexx-mode-map nil
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119 "Keymap for rexx-mode.")
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120 (if rexx-mode-map
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121 nil
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122 (setq rexx-mode-map (make-sparse-keymap))
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123 (define-key rexx-mode-map "\t" 'rexx-indent-command)
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124 (define-key rexx-mode-map "\C-m" 'rexx-indent-and-newline)
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125 (define-key rexx-mode-map 'backspace 'backward-delete-char-untabify)
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126 (define-key rexx-mode-map "\C-c\C-p" 'rexx-find-matching-do)
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127 (define-key rexx-mode-map "\C-c\C-c" 'rexx-debug)
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128 )
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129
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130 (defvar rexx-mode-syntax-table nil
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131 "Syntax table in use in REXX-mode buffers.")
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132
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133 (if rexx-mode-syntax-table
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134 ()
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135 (setq rexx-mode-syntax-table (make-syntax-table))
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136 (modify-syntax-entry ?\\ "\\" rexx-mode-syntax-table)
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137 (modify-syntax-entry ?/ ". 14" rexx-mode-syntax-table)
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138 (modify-syntax-entry ?* ". 23" rexx-mode-syntax-table)
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139 (modify-syntax-entry ?+ "." rexx-mode-syntax-table)
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140 (modify-syntax-entry ?- "." rexx-mode-syntax-table)
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141 (modify-syntax-entry ?= "." rexx-mode-syntax-table)
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142 (modify-syntax-entry ?% "." rexx-mode-syntax-table)
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143 (modify-syntax-entry ?< "." rexx-mode-syntax-table)
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144 (modify-syntax-entry ?> "." rexx-mode-syntax-table)
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145 (modify-syntax-entry ?& "." rexx-mode-syntax-table)
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146 (modify-syntax-entry ?| "." rexx-mode-syntax-table)
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147 (modify-syntax-entry ?. "_" rexx-mode-syntax-table)
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148 (modify-syntax-entry ?\' "\"" rexx-mode-syntax-table))
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149
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150 (defvar rexx-mode-abbrev-table nil
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151 "*Abbrev table in use in rexx-mode buffers.")
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152
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153 (if rexx-mode-abbrev-table
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154 nil
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155 (define-abbrev-table 'rexx-mode-abbrev-table '(
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156 ("address" "ADDRESS" rexx-check-expansion 0)
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157 ("arg" "ARG" rexx-check-expansion 0)
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158 ("break" "BREAK" rexx-check-expansion 0)
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159 ("call" "CALL" rexx-check-expansion 0)
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160 ("do" "DO" rexx-check-expansion 0)
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161 ("drop" "DROP" rexx-check-expansion 0)
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162 ("echo" "ECHO" rexx-check-expansion 0)
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163 ("else" "ELSE" rexx-check-expansion 0)
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164 ("end" "END" rexx-check-expansion 0)
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165 ("exit" "EXIT" rexx-check-expansion 0)
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166 ("if" "IF" rexx-check-expansion 0)
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167 ("interpret" "INTERPRET" rexx-check-expansion 0)
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168 ("iterate" "ITERATE" rexx-check-expansion 0)
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169 ("leave" "LEAVE" rexx-check-expansion 0)
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170 ("nop" "NOP" rexx-check-expansion 0)
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171 ("numeric" "NUMERIC" rexx-check-expansion 0)
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172 ("options" "OPTIONS" rexx-check-expansion 0)
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173 ("otherwise" "OTHERWISE" rexx-check-expansion 0)
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174 ("parse" "PARSE" rexx-check-expansion 0)
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175 ("procedure" "PROCEDURE" rexx-check-expansion 0)
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176 ("pull" "PULL" rexx-check-expansion 0)
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177 ("push" "PUSH" rexx-check-expansion 0)
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178 ("queue" "QUEUE" rexx-check-expansion 0)
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179 ("return" "RETURN" rexx-check-expansion 0)
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180 ("say" "SAY" rexx-check-expansion 0)
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181 ("select" "SELECT" rexx-check-expansion 0)
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182 ("shell" "SHELL" rexx-check-expansion 0)
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183 ("signal" "SIGNAL" rexx-check-expansion 0)
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184 ("then" "THEN" rexx-check-expansion 0)
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185 ("trace" "TRACE" rexx-check-expansion 0)
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186 ("upper" "UPPER" rexx-check-expansion 0)
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187 ("when" "WHEN" rexx-check-expansion 0)
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188 ("value" "VALUE" rexx-check-expansion 0)
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189 ("to" "TO" rexx-check-expansion 0)
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190 ("by" "BY" rexx-check-expansion 0)
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191 ("for" "FOR" rexx-check-expansion 0)
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192 ("forever" "FOREVER" rexx-check-expansion 0)
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193 ("while" "WHILE" rexx-check-expansion 0)
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194 ("until" "UNTIL" rexx-check-expansion 0)
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195 ("form" "FORM" rexx-check-expansion 0)
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196 ("digits" "DIGITS" rexx-check-expansion 0)
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197 ("fuzz" "FUZZ" rexx-check-expansion 0)
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198 ("scientific" "SCIENTIFIC" rexx-check-expansion 0)
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199 ("engineering" "ENGINEERING" rexx-check-expansion 0)
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200 ("failat" "FAILAT" rexx-check-expansion 0)
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201 ("prompt" "PROMPT" rexx-check-expansion 0)
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202 ("results" "RESULTS" rexx-check-expansion 0)
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203 ("upper" "UPPER" rexx-check-expansion 0)
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204 ("external" "EXTERNAL" rexx-check-expansion 0)
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205 ("source" "SOURCE" rexx-check-expansion 0)
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206 ("with" "WITH" rexx-check-expansion 0)
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207 ("command" "COMMAND" rexx-check-expansion 0)
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208 ("function" "FUNCTION" rexx-check-expansion 0)
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209 ("var" "VAR" rexx-check-expansion 0)
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210 ("version" "VERSION" rexx-check-expansion 0)
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211 ("expose" "EXPOSE" rexx-check-expansion 0)
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212 ("on" "ON" rexx-check-expansion 0)
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213 ("off" "OFF" rexx-check-expansion 0)
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214 ("abbrev" "ABBREV" rexx-check-expansion 0)
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215 ("abs" "ABS" rexx-check-expansion 0)
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216 ("addlib" "ADDLIB" rexx-check-expansion 0)
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217 ("b2c" "B2C" rexx-check-expansion 0)
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218 ("bitand" "BITAND" rexx-check-expansion 0)
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219 ("bitchg" "BITCHG" rexx-check-expansion 0)
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220 ("bitclr" "BITCLR" rexx-check-expansion 0)
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221 ("bitcomp" "BITCOMP" rexx-check-expansion 0)
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222 ("bitor" "BITOR" rexx-check-expansion 0)
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223 ("bittst" "BITTST" rexx-check-expansion 0)
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224 ("bitset" "BITSET" rexx-check-expansion 0)
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225 ("c2b" "C2B" rexx-check-expansion 0)
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226 ("c2d" "C2D" rexx-check-expansion 0)
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227 ("c2x" "C2X" rexx-check-expansion 0)
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228 ("center" "CENTER" rexx-check-expansion 0)
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229 ("centre" "CENTRE" rexx-check-expansion 0)
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230 ("close" "CLOSE" rexx-check-expansion 0)
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231 ("compress" "COMPRESS" rexx-check-expansion 0)
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232 ("compare" "COMPARE" rexx-check-expansion 0)
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233 ("copies" "COPIES" rexx-check-expansion 0)
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234 ("d2c" "D2C" rexx-check-expansion 0)
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235 ("datatype" "DATATYPE" rexx-check-expansion 0)
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236 ("delstr" "DELSTR" rexx-check-expansion 0)
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237 ("delword" "DELWORD" rexx-check-expansion 0)
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238 ("eof" "EOF" rexx-check-expansion 0)
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239 ("errortext" "ERRORTEXT" rexx-check-expansion 0)
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240 ("exists" "EXISTS" rexx-check-expansion 0)
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241 ("export" "EXPORT" rexx-check-expansion 0)
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242 ("freespace" "FREESPACE" rexx-check-expansion 0)
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243 ("getclip" "GETCLIP" rexx-check-expansion 0)
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244 ("getspace" "GETSPACE" rexx-check-expansion 0)
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245 ("hash" "HASH" rexx-check-expansion 0)
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246 ("import" "IMPORT" rexx-check-expansion 0)
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247 ("index" "INDEX" rexx-check-expansion 0)
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248 ("insert" "INSERT" rexx-check-expansion 0)
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249 ("lastpos" "LASTPOS" rexx-check-expansion 0)
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250 ("left" "LEFT" rexx-check-expansion 0)
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251 ("length" "LENGTH" rexx-check-expansion 0)
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252 ("max" "MAX" rexx-check-expansion 0)
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253 ("min" "MIN" rexx-check-expansion 0)
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254 ("open" "OPEN" rexx-check-expansion 0)
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255 ("overlay" "OVERLAY" rexx-check-expansion 0)
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256 ("pos" "POS" rexx-check-expansion 0)
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257 ("pragma" "PRAGMA" rexx-check-expansion 0)
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258 ("random" "RANDOM" rexx-check-expansion 0)
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259 ("randu" "RANDU" rexx-check-expansion 0)
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260 ("readch" "READCH" rexx-check-expansion 0)
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261 ("readln" "READLN" rexx-check-expansion 0)
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262 ("remlib" "REMLIB" rexx-check-expansion 0)
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263 ("reverse" "REVERSE" rexx-check-expansion 0)
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264 ("right" "RIGHT" rexx-check-expansion 0)
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265 ("seek" "SEEK" rexx-check-expansion 0)
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266 ("setclip" "SETCLIP" rexx-check-expansion 0)
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267 ("show" "SHOW" rexx-check-expansion 0)
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268 ("sign" "SIGN" rexx-check-expansion 0)
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269 ("space" "SPACE" rexx-check-expansion 0)
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270 ("storage" "STORAGE" rexx-check-expansion 0)
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271 ("strip" "STRIP" rexx-check-expansion 0)
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272 ("substr" "SUBSTR" rexx-check-expansion 0)
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273 ("subword" "SUBWORD" rexx-check-expansion 0)
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274 ("symbol" "SYMBOL" rexx-check-expansion 0)
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275 ("time" "TIME" rexx-check-expansion 0)
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276 ("trace" "TRACE" rexx-check-expansion 0)
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277 ("translate" "TRANSLATE" rexx-check-expansion 0)
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278 ("trim" "TRIM" rexx-check-expansion 0)
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279 ("verify" "VERIFY" rexx-check-expansion 0)
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280 ("word" "WORD" rexx-check-expansion 0)
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281 ("wordindex" "WORDINDEX" rexx-check-expansion 0)
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282 ("wordlength" "WORDLENGTH" rexx-check-expansion 0)
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283 ("words" "WORDS" rexx-check-expansion 0)
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284 ("writech" "WRITECH" rexx-check-expansion 0)
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285 ("writeln" "WRITELN" rexx-check-expansion 0)
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286 ("x2c" "X2C" rexx-check-expansion 0)
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287 ("xrange" "XRANGE" rexx-check-expansion 0)
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288 ("allocmem" "ALLOCMEM" rexx-check-expansion 0)
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289 ("baddr" "BADDR" rexx-check-expansion 0)
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290 ("bitxor" "BITXOR" rexx-check-expansion 0)
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291 ("break_c" "BREAK_C" rexx-check-expansion 0)
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292 ("break_d" "BREAK_D" rexx-check-expansion 0)
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293 ("break_e" "BREAK_E" rexx-check-expansion 0)
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294 ("break_f" "BREAK_F" rexx-check-expansion 0)
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295 ("cache" "CACHE" rexx-check-expansion 0)
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296 ("closeport" "CLOSEPORT" rexx-check-expansion 0)
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297 ("d2x" "D2X" rexx-check-expansion 0)
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298 ("date" "DATA" rexx-check-expansion 0)
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299 ("delay" "DELAY" rexx-check-expansion 0)
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300 ("delete" "DELETE" rexx-check-expansion 0)
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301 ("error" "ERROR" rexx-check-expansion 0)
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302 ("failure" "FAILURE" rexx-check-expansion 0)
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303 ("find" "FIND" rexx-check-expansion 0)
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304 ("forbid" "FORBID" rexx-check-expansion 0)
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305 ("freemem" "FREEMEM" rexx-check-expansion 0)
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306 ("getarg" "GETARG" rexx-check-expansion 0)
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307 ("getpkt" "GETPKT" rexx-check-expansion 0)
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308 ("halt" "HALT" rexx-check-expansion 0)
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309 ("ioerr" "IOERR" rexx-check-expansion 0)
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310 ("lines" "LINES" rexx-check-expansion 0)
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311 ("makedir" "MAKEDIR" rexx-check-expansion 0)
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312 ("next" "NEXT" rexx-check-expansion 0)
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313 ("novalue" "NOVALUE" rexx-check-expansion 0)
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314 ("null" "NULL" rexx-check-expansion 0)
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315 ("offset" "OFFSET" rexx-check-expansion 0)
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316 ("openport" "OPENPORT" rexx-check-expansion 0)
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317 ("permit" "PERMIT" rexx-check-expansion 0)
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318 ("rename" "RENAME" rexx-check-expansion 0)
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319 ("reply" "REPLY" rexx-check-expansion 0)
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320 ("showdir" "SHOWDIR" rexx-check-expansion 0)
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321 ("showlist" "SHOWLIST" rexx-check-expansion 0)
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322 ("sourceline" "SOURCELINE" rexx-check-expansion 0)
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323 ("statef" "STATEF" rexx-check-expansion 0)
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324 ("syntax" "SYNTAX" rexx-check-expansion 0)
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325 ("trunc" "TRUNC" rexx-check-expansion 0)
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326 ("typepkt" "TYPEPKT" rexx-check-expansion 0)
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327 ("waitpkt" "WAITPKT" rexx-check-expansion 0)
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328 ("x2d" "X2D" rexx-check-expansion 0))))
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329
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330 ;;;###autoload
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331 (defun rexx-mode ()
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332 "Major mode for editing REXX code.
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333 \\{rexx-mode-map}
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334
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335 Variables controlling indentation style:
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336 rexx-indent
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337 The basic indentation for do-blocks.
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338 rexx-end-indent
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339 The relative offset of the \"end\" statement. 0 places it in the
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340 same column as the statements of the block. Setting it to the same
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341 value as rexx-indent places the \"end\" under the do-line.
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342 rexx-cont-indent
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343 The indention for lines following \"then\", \"else\" and \",\"
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344 (continued) lines.
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345 rexx-tab-always-indent
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346 Non-nil means TAB in REXX mode should always reindent the current
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347 line, regardless of where in the line the point is when the TAB
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348 command is used.
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349
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350 If you have set rexx-end-indent to a nonzero value, you probably want to
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351 remap RETURN to rexx-indent-newline-indent. It makes sure that lines
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352 indents correctly when you press RETURN.
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353
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354 An extensive abbrevation table consisting of all the keywords of REXX are
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355 supplied. Expanded keywords are converted into upper case making it
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356 easier to distinguish them. To use this feature the buffer must be in
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357 abbrev-mode. (See example below.)
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358
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359 Turning on REXX mode calls the value of the variable rexx-mode-hook with
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360 no args, if that value is non-nil.
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361
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362 For example:
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363 (setq rexx-mode-hook '(lambda ()
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364 (setq rexx-indent 4)
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365 (setq rexx-end-indent 4)
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366 (setq rexx-cont-indent 4)
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367 (local-set-key \"\\C-m\" 'rexx-indent-newline-indent)
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368 (abbrev-mode 1)
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369 ))
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370
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371 will make the END aligned with the DO/SELECT. It will indent blocks and
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372 IF-statenents four steps and make sure that the END jumps into the
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373 correct position when RETURN is pressed. Finaly it will use the abbrev
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374 table to convert all REXX keywords into upper case."
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375 (interactive)
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376 (kill-all-local-variables)
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377 (use-local-map rexx-mode-map)
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378 (set-syntax-table rexx-mode-syntax-table)
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379 (setq major-mode 'rexx-mode)
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380 (setq mode-name "REXX")
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381 (setq local-abbrev-table rexx-mode-abbrev-table)
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382 (make-local-variable 'case-fold-search)
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383 (setq case-fold-search t)
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384 (make-local-variable 'paragraph-start)
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385 (setq paragraph-start (concat "^$\\|" page-delimiter))
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386 (make-local-variable 'paragraph-separate)
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387 (setq paragraph-separate paragraph-start)
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388 (make-local-variable 'paragraph-ignore-fill-prefix)
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389 (setq paragraph-ignore-fill-prefix t)
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390 (make-local-variable 'indent-line-function)
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391 (setq indent-line-function 'rexx-indent-command)
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392 (make-local-variable 'parse-sexp-ignore-comments)
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393 (setq parse-sexp-ignore-comments t)
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394 (make-local-variable 'comment-start)
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395 (setq comment-start "/* ")
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396 (make-local-variable 'comment-end)
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397 (setq comment-end " */")
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398 (make-local-variable 'comment-column)
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399 (setq comment-column 32)
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400 (make-local-variable 'comment-start-skip)
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401 (setq comment-start-skip "/\\*+ *")
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402 (make-local-variable 'comment-indent-hook)
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403 (setq comment-indent-hook 'rexx-comment-indent)
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404 (run-hooks 'rexx-mode-hook))
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405
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406
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407 (defun rexx-indent-command (&optional whole-exp)
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408 "Indent the current line as REXX code."
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409 (interactive "P")
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410 (if whole-exp
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411 (let ((shift-amt (rexx-indent-line))
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412 beg
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413 end)
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414 (save-excursion
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415 (if rexx-tab-always-indent
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416 (beginning-of-line))
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417 (setq beg (point))
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418 (forward-sexp 1)
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419 (setq end (point))
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420 (goto-char beg)
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421 (forward-line 1)
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422 (setq beg (point)))
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423 (if (> end beg)
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424 (indent-code-rigidly beg end shift-amt)))
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425 (if (and (not rexx-tab-always-indent)
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426 (save-excursion
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427 (skip-chars-backward " \t")
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428 (not (bolp))))
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429 (insert-tab)
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430 (rexx-indent-line))))
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431
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432 (defun rexx-indent-line ()
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433 "Indent the current line as REXX code.
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434 Return the amount the indentation changed by."
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435 (let ((indent (rexx-calc-indent))
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436 beg
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437 shift-amt
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438 (pos (- (point-max) (point))))
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439 (beginning-of-line)
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440 (setq beg (point))
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441 (cond ((eq indent nil) (setq indent (current-indentation)))
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442 ((eq indent t) (setq indent (rexx-calculate-indent-within-comment)))
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443 ((looking-at "[ \t]*#") (setq indent 0))
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444 (t (skip-chars-forward " \t")
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445 (if (listp indent) (setq indent (car indent)))
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446 ;; /* Sprekspecifik kod! */
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447 (if (looking-at "end") (setq indent (- indent rexx-end-indent)))))
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448 (skip-chars-forward " \t")
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449 (setq shift-amt (- indent (current-column)))
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450 (if (zerop shift-amt)
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451 (if (> (- (point-max) pos) (point))
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452 (goto-char (- (point-max) pos)))
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453 (delete-region beg (point))
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454 (indent-to indent)
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455 (if (> (- (point-max) pos) (point))
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456 (goto-char (- (point-max) pos))))
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457 shift-amt))
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458
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459 (defun rexx-calc-indent ()
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460 "Return the appropriate indentation for this line as an int."
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461 (save-excursion
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462 (beginning-of-line)
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463 (let ((block (rexx-find-environment))
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464 beg
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465 state
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466 indent)
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467 (save-excursion (setq state (rexx-inside-comment-or-string)))
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468 (cond ((or (nth 3 state) (nth 4 state))
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469 (nth 4 state)) ;; Inside a comment or string
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470 (t
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471 ;; Find line to indent current line after.
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472 (rexx-backup-to-noncomment 1)
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473 (beginning-of-line)
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474 (setq beg (rexx-find-environment))
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475 (while (> beg block)
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476 (goto-char beg)
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477 (beginning-of-line)
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478 (setq beg (rexx-find-environment)))
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479
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480 (if (> (point) block)
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481 ;; Check to see if we shall make a special indention
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482 (if (looking-at rexx-special-regexp)
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483 (+ (current-indentation) rexx-cont-indent)
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484 ;; If not, find the basic indention by stepping
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485 ;; by all special indented lines.
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486 (progn
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487 (setq indent (current-indentation))
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488 (rexx-backup-to-noncomment 1)
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489 (beginning-of-line)
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490 (while (looking-at rexx-special-regexp)
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491 (setq indent (current-indentation))
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492 (rexx-backup-to-noncomment 1)
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493 (beginning-of-line))
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494 indent))
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495 (if (= 1 block)
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496 0
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497 ;; Indent after the do-line.
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498 (progn
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499 (goto-char block)
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500 (+ (current-indentation) rexx-indent)))))))))
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501
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502 (defun rexx-backup-to-noncomment (lim)
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503 "Backup the point to the previous noncomment REXX line."
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504 (let (stop)
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505 (while (not stop)
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506 (skip-chars-backward " \t\n\f" lim)
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507 (if (and (>= (point) (+ 2 lim))
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508 (save-excursion
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509 (forward-char -2)
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510 (looking-at "\\*/")))
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511 (search-backward "/*" lim 'move)
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512 (setq stop t)))
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513 (>= (point) lim)))
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514
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515 (defun rexx-find-environment ()
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516 "Return the position of the corresponding \"do\" or \"select\".
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517 If none found, return the beginning of buffer."
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518 (save-excursion
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519 (let ((do-level 1)
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520 (cont t)
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521 state)
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522 (while (and cont (not (zerop do-level)))
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523 (setq cont (re-search-backward "\\b\\(do\\|select\\|end\\)\\b" 1 t))
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524 (save-excursion (setq state (rexx-inside-comment-or-string)))
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525 (setq do-level (+ do-level
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526 (cond ((or (nth 3 state) (nth 4 state)) 0)
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527 ((looking-at "do") -1)
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528 ((looking-at "select") -1)
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529 ((looking-at "end") +1)
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530 (t 0)))))
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531
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532 (if cont (point) 1))))
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533
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534 (defun rexx-calculate-indent-within-comment ()
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535 "Return the indentation amount for line, assuming that
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536 the current line is to be regarded as part of a block comment."
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537 (let (end star-start)
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538 (save-excursion
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539 (beginning-of-line)
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540 (skip-chars-forward " \t")
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541 (setq star-start (= (following-char) ?\*))
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542 (skip-chars-backward " \t\n")
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543 (setq end (point))
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544 (beginning-of-line)
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545 (skip-chars-forward " \t")
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546 (and (re-search-forward "/\\*[ \t]*" end t)
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547 star-start
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548 (goto-char (1+ (match-beginning 0))))
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549 (current-column))))
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550
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551 (defun rexx-comment-indent ()
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552 (if (looking-at "^/\\*")
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553 0 ;Existing comment at bol stays there.
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554 (save-excursion
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555 (skip-chars-backward " \t")
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556 (max (1+ (current-column)) ;Else indent at comment column
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557 comment-column)))) ; except leave at least one space.
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558
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559 (defun rexx-find-matching-do ()
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560 "Set mark, look for the \"do\" or \"select\" for the present block."
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561 (interactive)
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562 (set-mark-command nil)
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563 (beginning-of-line)
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564 (goto-char (rexx-find-environment)))
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565
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566 (defun rexx-check-expansion ()
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567 "If abbrev was made within a comment or a string, de-abbrev!"
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568 (let ((state (rexx-inside-comment-or-string)))
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569 (if (or (nth 3 state) (nth 4 state))
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570 (unexpand-abbrev))))
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571
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572 (defun rexx-inside-comment-or-string ()
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573 "Check if the point is inside a comment or a string.
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574 It returns the state from parse-partial-sexp for the search that
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575 terminated on the points position"
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576 (let ((origpoint (point))
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577 state)
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578 (save-excursion
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|
579 (goto-char 1)
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580 (while (> origpoint (point))
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581 (setq state (parse-partial-sexp (point) origpoint 0))))
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582 state))
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583
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584 (defun rexx-indent-and-newline ()
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585 "New newline-and-indent which expands abbrevs before running
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586 a regular newline-and-indent."
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587 (interactive)
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588 (if abbrev-mode
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589 (expand-abbrev))
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590 (newline-and-indent))
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591
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592 (defun rexx-indent-newline-indent ()
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593 "New newline-and-indent which expands abbrevs and indent the line
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594 before running a regular newline-and-indent."
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595 (interactive)
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596 (rexx-indent-command)
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597 (if abbrev-mode
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598 (expand-abbrev))
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599 (newline-and-indent))
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