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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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16
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19 ;; along with XEmacs; see the file COPYING. If not, write to the
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20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 ;; Boston, MA 02111-1307, USA.
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22
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23 ;;; Synched up with: Not in FSF.
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24
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25 ;;; AUTHOR
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26 ;;; Anders Lindgren, d91ali@csd.uu.se
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27 ;;;
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108
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28 ;;; Abbreviation table due to:
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29 ;;; Johan Bergkvist, nv91-jbe@nada.kth.se
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30 ;;;
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31 ;;; USAGE
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32 ;;; This file contains code for a GNU Emacs major mode for
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33 ;;; editing REXX program files.
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34 ;;;
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35 ;;; Type C-h m in Emacs for information on how to configurate
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36 ;;; the rexx-mode, or see rexx-mode.doc.
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37 ;;;
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38 ;;; Put the following lines into your .emacs and rexx-mode
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39 ;;; will be automatically loaded when editing a REXX program.
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40 ;;; If rexx-mode shall be used for files with other extensions
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41 ;;; you can create more (cons ...) lines with these extensions.
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42 ;;;
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43 ;;; (autoload 'rexx-mode "rexx-mode" "REXX mode" nil t)
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44 ;;; (setq auto-mode-alist
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45 ;;; (append
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46 ;;; (list (cons "\\.rexx$" 'rexx-mode)
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47 ;;; (cons "\\.elx$" 'rexx-mode)
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48 ;;; (cons "\\.ncomm$" 'rexx-mode)
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49 ;;; (cons "\\.cpr$" 'rexx-mode)
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50 ;;; )
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51 ;;; auto-mode-alist))
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52 ;;;
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53 ;;; HISTORY
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54 ;;; 93-01-07 V0.1 ALi Works for the first time.
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55 ;;; 92-01-11 V0.2 ALi rexx-calc-indent totally rewritten.
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56 ;;; 93-03-08 V0.3 JB rexx-indent-and-newline-and-indent added.
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57 ;;; Abbrev-table containing 173 entries created.
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58 ;;; rexx-check-expansion added.
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59 ;;; rexx-mode enables use of abbrev-table.
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60 ;;; 93-03-15 V0.4 ALi abbrev-mode removed, better to call
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61 ;;; (abbrev-mode 1) from the hook.
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62 ;;; case-fold-search set to t to recognize capital
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63 ;;; letters in keywords.
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64 ;;; Old (setq case-fold-search nil) removed which
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65 ;;; prevented the recognition of END.
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66 ;;; rexx-indent-and-newline-and-indent renamed to
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67 ;;; rexx-indent-newline-indent.
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68 ;;; rexx-i-n-i now only expands abbrevs when
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69 ;;; buffer is in abbrev-mode.
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70 ;;; New rexx-newline-and-indent added.
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71 ;;; 93-03-20 ALi A serious bug in the routine for checking
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72 ;;; strings and comments found and fixed.
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73 ;;; V1.0 Relesed!
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74 ;;;
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75
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76
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77 (provide 'rexx-mode)
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78
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134
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79 (defgroup rexx nil
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80 "Major mode for editing REXX program files"
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81 :group 'languages)
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82
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83
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84 (defcustom rexx-indent 8
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85 "*This variable contains the indentation in rexx-mode."
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86 :type 'integer
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87 :group 'rexx)
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88
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89 (defcustom rexx-end-indent 0
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90 "*This variable indicates the relative position of the \"end\" in REXX mode."
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91 :type 'integer
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92 :group 'rexx)
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93
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94 (defcustom rexx-cont-indent 8
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95 "*This variable indicates how far a continued line shall be intended."
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96 :type 'integer
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97 :group 'rexx)
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98
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99 (defcustom rexx-comment-col 32
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100 "*This variable gives the desired comment column
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101 for comments to the right of text."
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102 :type 'integer
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103 :group 'rexx)
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104
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105 (defcustom rexx-tab-always-indent t
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106 "*Non-nil means TAB in REXX mode should always reindent the current line,
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107 regardless of where in the line point is when the TAB command is used."
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108 :type 'boolean
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109 :group 'rexx)
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110
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111 (defcustom rexx-special-regexp
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112 ".*\\(,\\|then\\|else\\)[ \t]*\\(/\\*.*\\*/\\)?[ \t]*$"
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113 "*Regular expression for parsing lines which shall be followed by
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134
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114 a extra indention"
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115 :type 'regexp
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116 :group 'rexx)
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117
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118 (defconst rexx-font-lock-keywords
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119 (purecopy
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120 (list
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121 (cons (concat "\\<\\("
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122 (mapconcat 'identity
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123 '("address" "arg" "break" "call" "do" "drop" "echo" "else" "end"
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124 "exit" "if" "interpret" "iterate" "leave" "nop" "numeric"
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125 "options" "otherwise" "parse" "procedure" "pull" "push" "queue"
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126 "return" "say" "select" "shell" "signal" "then" "trace" "upper"
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127 "when" "value" "to" "by" "for" "forever" "while" "until" "form"
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128 "digits" "fuzz" "scientific" "engineering" "failat" "prompt"
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129 "results" "upper" "external" "source" "with" "command"
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130 "function" "var" "version" "expose" "on" "off")
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131 "\\|") "\\)\\>") 'font-lock-keyword-face)
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132 '("\\(\\sw+\\):" 1 font-lock-function-name-face)))
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133 "Additional expressions to highlight in Rexx mode.")
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134 (put 'rexx-mode 'font-lock-defaults '(rexx-font-lock-keywords))
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135
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136 (defvar rexx-mode-map nil
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137 "Keymap for rexx-mode.")
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138 (if rexx-mode-map
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139 nil
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140 (setq rexx-mode-map (make-sparse-keymap))
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141 (define-key rexx-mode-map "\t" 'rexx-indent-command)
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142 (define-key rexx-mode-map "\C-m" 'rexx-indent-and-newline)
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143 (define-key rexx-mode-map 'backspace 'backward-delete-char-untabify)
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144 (define-key rexx-mode-map "\C-c\C-p" 'rexx-find-matching-do)
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145 (define-key rexx-mode-map "\C-c\C-c" 'rexx-debug)
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146 )
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147
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148 (defvar rexx-mode-syntax-table nil
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149 "Syntax table in use in REXX-mode buffers.")
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150
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151 (if rexx-mode-syntax-table
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152 ()
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153 (setq rexx-mode-syntax-table (make-syntax-table))
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154 (modify-syntax-entry ?\\ "\\" rexx-mode-syntax-table)
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155 (modify-syntax-entry ?/ ". 14" rexx-mode-syntax-table)
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156 (modify-syntax-entry ?* ". 23" rexx-mode-syntax-table)
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157 (modify-syntax-entry ?+ "." rexx-mode-syntax-table)
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158 (modify-syntax-entry ?- "." rexx-mode-syntax-table)
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159 (modify-syntax-entry ?= "." rexx-mode-syntax-table)
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160 (modify-syntax-entry ?% "." rexx-mode-syntax-table)
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161 (modify-syntax-entry ?< "." rexx-mode-syntax-table)
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162 (modify-syntax-entry ?> "." rexx-mode-syntax-table)
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163 (modify-syntax-entry ?& "." rexx-mode-syntax-table)
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164 (modify-syntax-entry ?| "." rexx-mode-syntax-table)
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165 (modify-syntax-entry ?. "_" rexx-mode-syntax-table)
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166 (modify-syntax-entry ?\' "\"" rexx-mode-syntax-table))
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167
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168 (defvar rexx-mode-abbrev-table nil
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169 "*Abbrev table in use in rexx-mode buffers.")
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170
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171 (if rexx-mode-abbrev-table
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172 nil
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173 (define-abbrev-table 'rexx-mode-abbrev-table '(
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174 ("address" "ADDRESS" rexx-check-expansion 0)
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175 ("arg" "ARG" rexx-check-expansion 0)
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176 ("break" "BREAK" rexx-check-expansion 0)
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177 ("call" "CALL" rexx-check-expansion 0)
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178 ("do" "DO" rexx-check-expansion 0)
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179 ("drop" "DROP" rexx-check-expansion 0)
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180 ("echo" "ECHO" rexx-check-expansion 0)
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181 ("else" "ELSE" rexx-check-expansion 0)
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182 ("end" "END" rexx-check-expansion 0)
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183 ("exit" "EXIT" rexx-check-expansion 0)
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184 ("if" "IF" rexx-check-expansion 0)
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185 ("interpret" "INTERPRET" rexx-check-expansion 0)
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186 ("iterate" "ITERATE" rexx-check-expansion 0)
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187 ("leave" "LEAVE" rexx-check-expansion 0)
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188 ("nop" "NOP" rexx-check-expansion 0)
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189 ("numeric" "NUMERIC" rexx-check-expansion 0)
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190 ("options" "OPTIONS" rexx-check-expansion 0)
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191 ("otherwise" "OTHERWISE" rexx-check-expansion 0)
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192 ("parse" "PARSE" rexx-check-expansion 0)
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193 ("procedure" "PROCEDURE" rexx-check-expansion 0)
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194 ("pull" "PULL" rexx-check-expansion 0)
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195 ("push" "PUSH" rexx-check-expansion 0)
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196 ("queue" "QUEUE" rexx-check-expansion 0)
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197 ("return" "RETURN" rexx-check-expansion 0)
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198 ("say" "SAY" rexx-check-expansion 0)
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199 ("select" "SELECT" rexx-check-expansion 0)
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200 ("shell" "SHELL" rexx-check-expansion 0)
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201 ("signal" "SIGNAL" rexx-check-expansion 0)
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202 ("then" "THEN" rexx-check-expansion 0)
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203 ("trace" "TRACE" rexx-check-expansion 0)
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204 ("upper" "UPPER" rexx-check-expansion 0)
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205 ("when" "WHEN" rexx-check-expansion 0)
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206 ("value" "VALUE" rexx-check-expansion 0)
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207 ("to" "TO" rexx-check-expansion 0)
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208 ("by" "BY" rexx-check-expansion 0)
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209 ("for" "FOR" rexx-check-expansion 0)
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210 ("forever" "FOREVER" rexx-check-expansion 0)
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211 ("while" "WHILE" rexx-check-expansion 0)
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212 ("until" "UNTIL" rexx-check-expansion 0)
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213 ("form" "FORM" rexx-check-expansion 0)
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214 ("digits" "DIGITS" rexx-check-expansion 0)
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215 ("fuzz" "FUZZ" rexx-check-expansion 0)
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216 ("scientific" "SCIENTIFIC" rexx-check-expansion 0)
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217 ("engineering" "ENGINEERING" rexx-check-expansion 0)
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218 ("failat" "FAILAT" rexx-check-expansion 0)
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219 ("prompt" "PROMPT" rexx-check-expansion 0)
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220 ("results" "RESULTS" rexx-check-expansion 0)
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221 ("upper" "UPPER" rexx-check-expansion 0)
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222 ("external" "EXTERNAL" rexx-check-expansion 0)
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223 ("source" "SOURCE" rexx-check-expansion 0)
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224 ("with" "WITH" rexx-check-expansion 0)
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225 ("command" "COMMAND" rexx-check-expansion 0)
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226 ("function" "FUNCTION" rexx-check-expansion 0)
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227 ("var" "VAR" rexx-check-expansion 0)
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228 ("version" "VERSION" rexx-check-expansion 0)
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229 ("expose" "EXPOSE" rexx-check-expansion 0)
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230 ("on" "ON" rexx-check-expansion 0)
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231 ("off" "OFF" rexx-check-expansion 0)
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232 ("abbrev" "ABBREV" rexx-check-expansion 0)
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233 ("abs" "ABS" rexx-check-expansion 0)
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234 ("addlib" "ADDLIB" rexx-check-expansion 0)
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235 ("b2c" "B2C" rexx-check-expansion 0)
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236 ("bitand" "BITAND" rexx-check-expansion 0)
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237 ("bitchg" "BITCHG" rexx-check-expansion 0)
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238 ("bitclr" "BITCLR" rexx-check-expansion 0)
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239 ("bitcomp" "BITCOMP" rexx-check-expansion 0)
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240 ("bitor" "BITOR" rexx-check-expansion 0)
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241 ("bittst" "BITTST" rexx-check-expansion 0)
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242 ("bitset" "BITSET" rexx-check-expansion 0)
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243 ("c2b" "C2B" rexx-check-expansion 0)
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244 ("c2d" "C2D" rexx-check-expansion 0)
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245 ("c2x" "C2X" rexx-check-expansion 0)
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246 ("center" "CENTER" rexx-check-expansion 0)
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247 ("centre" "CENTRE" rexx-check-expansion 0)
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248 ("close" "CLOSE" rexx-check-expansion 0)
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249 ("compress" "COMPRESS" rexx-check-expansion 0)
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250 ("compare" "COMPARE" rexx-check-expansion 0)
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251 ("copies" "COPIES" rexx-check-expansion 0)
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252 ("d2c" "D2C" rexx-check-expansion 0)
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253 ("datatype" "DATATYPE" rexx-check-expansion 0)
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254 ("delstr" "DELSTR" rexx-check-expansion 0)
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255 ("delword" "DELWORD" rexx-check-expansion 0)
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256 ("eof" "EOF" rexx-check-expansion 0)
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257 ("errortext" "ERRORTEXT" rexx-check-expansion 0)
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258 ("exists" "EXISTS" rexx-check-expansion 0)
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259 ("export" "EXPORT" rexx-check-expansion 0)
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260 ("freespace" "FREESPACE" rexx-check-expansion 0)
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261 ("getclip" "GETCLIP" rexx-check-expansion 0)
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262 ("getspace" "GETSPACE" rexx-check-expansion 0)
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263 ("hash" "HASH" rexx-check-expansion 0)
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264 ("import" "IMPORT" rexx-check-expansion 0)
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265 ("index" "INDEX" rexx-check-expansion 0)
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266 ("insert" "INSERT" rexx-check-expansion 0)
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267 ("lastpos" "LASTPOS" rexx-check-expansion 0)
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268 ("left" "LEFT" rexx-check-expansion 0)
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269 ("length" "LENGTH" rexx-check-expansion 0)
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270 ("max" "MAX" rexx-check-expansion 0)
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271 ("min" "MIN" rexx-check-expansion 0)
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272 ("open" "OPEN" rexx-check-expansion 0)
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273 ("overlay" "OVERLAY" rexx-check-expansion 0)
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274 ("pos" "POS" rexx-check-expansion 0)
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275 ("pragma" "PRAGMA" rexx-check-expansion 0)
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276 ("random" "RANDOM" rexx-check-expansion 0)
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277 ("randu" "RANDU" rexx-check-expansion 0)
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278 ("readch" "READCH" rexx-check-expansion 0)
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279 ("readln" "READLN" rexx-check-expansion 0)
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280 ("remlib" "REMLIB" rexx-check-expansion 0)
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281 ("reverse" "REVERSE" rexx-check-expansion 0)
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282 ("right" "RIGHT" rexx-check-expansion 0)
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283 ("seek" "SEEK" rexx-check-expansion 0)
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284 ("setclip" "SETCLIP" rexx-check-expansion 0)
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285 ("show" "SHOW" rexx-check-expansion 0)
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286 ("sign" "SIGN" rexx-check-expansion 0)
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287 ("space" "SPACE" rexx-check-expansion 0)
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288 ("storage" "STORAGE" rexx-check-expansion 0)
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289 ("strip" "STRIP" rexx-check-expansion 0)
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290 ("substr" "SUBSTR" rexx-check-expansion 0)
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291 ("subword" "SUBWORD" rexx-check-expansion 0)
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292 ("symbol" "SYMBOL" rexx-check-expansion 0)
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293 ("time" "TIME" rexx-check-expansion 0)
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294 ("trace" "TRACE" rexx-check-expansion 0)
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295 ("translate" "TRANSLATE" rexx-check-expansion 0)
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296 ("trim" "TRIM" rexx-check-expansion 0)
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297 ("verify" "VERIFY" rexx-check-expansion 0)
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298 ("word" "WORD" rexx-check-expansion 0)
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299 ("wordindex" "WORDINDEX" rexx-check-expansion 0)
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300 ("wordlength" "WORDLENGTH" rexx-check-expansion 0)
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301 ("words" "WORDS" rexx-check-expansion 0)
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302 ("writech" "WRITECH" rexx-check-expansion 0)
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303 ("writeln" "WRITELN" rexx-check-expansion 0)
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304 ("x2c" "X2C" rexx-check-expansion 0)
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305 ("xrange" "XRANGE" rexx-check-expansion 0)
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306 ("allocmem" "ALLOCMEM" rexx-check-expansion 0)
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307 ("baddr" "BADDR" rexx-check-expansion 0)
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308 ("bitxor" "BITXOR" rexx-check-expansion 0)
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309 ("break_c" "BREAK_C" rexx-check-expansion 0)
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310 ("break_d" "BREAK_D" rexx-check-expansion 0)
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311 ("break_e" "BREAK_E" rexx-check-expansion 0)
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312 ("break_f" "BREAK_F" rexx-check-expansion 0)
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313 ("cache" "CACHE" rexx-check-expansion 0)
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314 ("closeport" "CLOSEPORT" rexx-check-expansion 0)
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315 ("d2x" "D2X" rexx-check-expansion 0)
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316 ("date" "DATA" rexx-check-expansion 0)
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317 ("delay" "DELAY" rexx-check-expansion 0)
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318 ("delete" "DELETE" rexx-check-expansion 0)
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319 ("error" "ERROR" rexx-check-expansion 0)
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320 ("failure" "FAILURE" rexx-check-expansion 0)
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321 ("find" "FIND" rexx-check-expansion 0)
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322 ("forbid" "FORBID" rexx-check-expansion 0)
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323 ("freemem" "FREEMEM" rexx-check-expansion 0)
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324 ("getarg" "GETARG" rexx-check-expansion 0)
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325 ("getpkt" "GETPKT" rexx-check-expansion 0)
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326 ("halt" "HALT" rexx-check-expansion 0)
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327 ("ioerr" "IOERR" rexx-check-expansion 0)
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328 ("lines" "LINES" rexx-check-expansion 0)
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329 ("makedir" "MAKEDIR" rexx-check-expansion 0)
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330 ("next" "NEXT" rexx-check-expansion 0)
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331 ("novalue" "NOVALUE" rexx-check-expansion 0)
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332 ("null" "NULL" rexx-check-expansion 0)
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333 ("offset" "OFFSET" rexx-check-expansion 0)
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334 ("openport" "OPENPORT" rexx-check-expansion 0)
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335 ("permit" "PERMIT" rexx-check-expansion 0)
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336 ("rename" "RENAME" rexx-check-expansion 0)
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337 ("reply" "REPLY" rexx-check-expansion 0)
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338 ("showdir" "SHOWDIR" rexx-check-expansion 0)
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339 ("showlist" "SHOWLIST" rexx-check-expansion 0)
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340 ("sourceline" "SOURCELINE" rexx-check-expansion 0)
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341 ("statef" "STATEF" rexx-check-expansion 0)
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342 ("syntax" "SYNTAX" rexx-check-expansion 0)
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343 ("trunc" "TRUNC" rexx-check-expansion 0)
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344 ("typepkt" "TYPEPKT" rexx-check-expansion 0)
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345 ("waitpkt" "WAITPKT" rexx-check-expansion 0)
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346 ("x2d" "X2D" rexx-check-expansion 0))))
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347
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348 ;;;###autoload
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349 (defun rexx-mode ()
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350 "Major mode for editing REXX code.
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351 \\{rexx-mode-map}
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352
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353 Variables controlling indentation style:
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354 rexx-indent
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355 The basic indentation for do-blocks.
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356 rexx-end-indent
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357 The relative offset of the \"end\" statement. 0 places it in the
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358 same column as the statements of the block. Setting it to the same
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359 value as rexx-indent places the \"end\" under the do-line.
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360 rexx-cont-indent
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361 The indention for lines following \"then\", \"else\" and \",\"
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362 (continued) lines.
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363 rexx-tab-always-indent
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364 Non-nil means TAB in REXX mode should always reindent the current
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365 line, regardless of where in the line the point is when the TAB
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366 command is used.
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367
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368 If you have set rexx-end-indent to a nonzero value, you probably want to
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369 remap RETURN to rexx-indent-newline-indent. It makes sure that lines
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370 indents correctly when you press RETURN.
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371
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108
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372 An extensive abbreviation table consisting of all the keywords of REXX are
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0
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373 supplied. Expanded keywords are converted into upper case making it
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374 easier to distinguish them. To use this feature the buffer must be in
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375 abbrev-mode. (See example below.)
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376
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377 Turning on REXX mode calls the value of the variable rexx-mode-hook with
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378 no args, if that value is non-nil.
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379
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380 For example:
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381 (setq rexx-mode-hook '(lambda ()
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382 (setq rexx-indent 4)
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383 (setq rexx-end-indent 4)
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384 (setq rexx-cont-indent 4)
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385 (local-set-key \"\\C-m\" 'rexx-indent-newline-indent)
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386 (abbrev-mode 1)
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387 ))
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388
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389 will make the END aligned with the DO/SELECT. It will indent blocks and
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108
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390 IF-statements four steps and make sure that the END jumps into the
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391 correct position when RETURN is pressed. Finally it will use the abbrev
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0
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392 table to convert all REXX keywords into upper case."
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393 (interactive)
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394 (kill-all-local-variables)
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395 (use-local-map rexx-mode-map)
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396 (set-syntax-table rexx-mode-syntax-table)
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397 (setq major-mode 'rexx-mode)
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398 (setq mode-name "REXX")
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399 (setq local-abbrev-table rexx-mode-abbrev-table)
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400 (make-local-variable 'case-fold-search)
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401 (setq case-fold-search t)
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402 (make-local-variable 'paragraph-start)
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403 (setq paragraph-start (concat "^$\\|" page-delimiter))
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404 (make-local-variable 'paragraph-separate)
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405 (setq paragraph-separate paragraph-start)
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406 (make-local-variable 'paragraph-ignore-fill-prefix)
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407 (setq paragraph-ignore-fill-prefix t)
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408 (make-local-variable 'indent-line-function)
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409 (setq indent-line-function 'rexx-indent-command)
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410 (make-local-variable 'parse-sexp-ignore-comments)
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411 (setq parse-sexp-ignore-comments t)
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412 (make-local-variable 'comment-start)
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413 (setq comment-start "/* ")
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414 (make-local-variable 'comment-end)
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415 (setq comment-end " */")
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416 (make-local-variable 'comment-column)
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417 (setq comment-column 32)
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418 (make-local-variable 'comment-start-skip)
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419 (setq comment-start-skip "/\\*+ *")
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420 (make-local-variable 'comment-indent-hook)
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421 (setq comment-indent-hook 'rexx-comment-indent)
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422 (run-hooks 'rexx-mode-hook))
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423
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424
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425 (defun rexx-indent-command (&optional whole-exp)
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426 "Indent the current line as REXX code."
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427 (interactive "P")
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428 (if whole-exp
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429 (let ((shift-amt (rexx-indent-line))
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430 beg
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431 end)
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432 (save-excursion
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433 (if rexx-tab-always-indent
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434 (beginning-of-line))
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435 (setq beg (point))
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436 (forward-sexp 1)
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437 (setq end (point))
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438 (goto-char beg)
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439 (forward-line 1)
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440 (setq beg (point)))
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441 (if (> end beg)
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442 (indent-code-rigidly beg end shift-amt)))
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443 (if (and (not rexx-tab-always-indent)
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444 (save-excursion
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445 (skip-chars-backward " \t")
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446 (not (bolp))))
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447 (insert-tab)
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448 (rexx-indent-line))))
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449
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450 (defun rexx-indent-line ()
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451 "Indent the current line as REXX code.
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452 Return the amount the indentation changed by."
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453 (let ((indent (rexx-calc-indent))
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454 beg
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455 shift-amt
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456 (pos (- (point-max) (point))))
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457 (beginning-of-line)
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458 (setq beg (point))
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459 (cond ((eq indent nil) (setq indent (current-indentation)))
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460 ((eq indent t) (setq indent (rexx-calculate-indent-within-comment)))
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461 ((looking-at "[ \t]*#") (setq indent 0))
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462 (t (skip-chars-forward " \t")
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463 (if (listp indent) (setq indent (car indent)))
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464 ;; /* Sprekspecifik kod! */
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465 (if (looking-at "end") (setq indent (- indent rexx-end-indent)))))
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466 (skip-chars-forward " \t")
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467 (setq shift-amt (- indent (current-column)))
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468 (if (zerop shift-amt)
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469 (if (> (- (point-max) pos) (point))
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470 (goto-char (- (point-max) pos)))
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471 (delete-region beg (point))
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472 (indent-to indent)
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473 (if (> (- (point-max) pos) (point))
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474 (goto-char (- (point-max) pos))))
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475 shift-amt))
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476
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477 (defun rexx-calc-indent ()
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478 "Return the appropriate indentation for this line as an int."
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479 (save-excursion
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480 (beginning-of-line)
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481 (let ((block (rexx-find-environment))
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482 beg
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483 state
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484 indent)
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485 (save-excursion (setq state (rexx-inside-comment-or-string)))
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486 (cond ((or (nth 3 state) (nth 4 state))
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487 (nth 4 state)) ;; Inside a comment or string
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488 (t
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489 ;; Find line to indent current line after.
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490 (rexx-backup-to-noncomment 1)
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491 (beginning-of-line)
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492 (setq beg (rexx-find-environment))
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493 (while (> beg block)
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494 (goto-char beg)
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495 (beginning-of-line)
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496 (setq beg (rexx-find-environment)))
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497
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498 (if (> (point) block)
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499 ;; Check to see if we shall make a special indention
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|
500 (if (looking-at rexx-special-regexp)
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501 (+ (current-indentation) rexx-cont-indent)
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502 ;; If not, find the basic indention by stepping
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503 ;; by all special indented lines.
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504 (progn
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505 (setq indent (current-indentation))
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506 (rexx-backup-to-noncomment 1)
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507 (beginning-of-line)
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|
|
508 (while (looking-at rexx-special-regexp)
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509 (setq indent (current-indentation))
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510 (rexx-backup-to-noncomment 1)
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511 (beginning-of-line))
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512 indent))
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513 (if (= 1 block)
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514 0
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515 ;; Indent after the do-line.
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|
516 (progn
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|
517 (goto-char block)
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|
518 (+ (current-indentation) rexx-indent)))))))))
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519
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|
520 (defun rexx-backup-to-noncomment (lim)
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|
521 "Backup the point to the previous noncomment REXX line."
|
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|
522 (let (stop)
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|
523 (while (not stop)
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524 (skip-chars-backward " \t\n\f" lim)
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525 (if (and (>= (point) (+ 2 lim))
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526 (save-excursion
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|
527 (forward-char -2)
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528 (looking-at "\\*/")))
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529 (search-backward "/*" lim 'move)
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|
530 (setq stop t)))
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|
531 (>= (point) lim)))
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532
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|
533 (defun rexx-find-environment ()
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|
534 "Return the position of the corresponding \"do\" or \"select\".
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|
535 If none found, return the beginning of buffer."
|
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|
536 (save-excursion
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|
537 (let ((do-level 1)
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538 (cont t)
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539 state)
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540 (while (and cont (not (zerop do-level)))
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|
541 (setq cont (re-search-backward "\\b\\(do\\|select\\|end\\)\\b" 1 t))
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542 (save-excursion (setq state (rexx-inside-comment-or-string)))
|
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|
543 (setq do-level (+ do-level
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544 (cond ((or (nth 3 state) (nth 4 state)) 0)
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545 ((looking-at "do") -1)
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546 ((looking-at "select") -1)
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547 ((looking-at "end") +1)
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|
548 (t 0)))))
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549
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550 (if cont (point) 1))))
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551
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|
552 (defun rexx-calculate-indent-within-comment ()
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|
553 "Return the indentation amount for line, assuming that
|
|
|
554 the current line is to be regarded as part of a block comment."
|
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|
555 (let (end star-start)
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|
556 (save-excursion
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|
557 (beginning-of-line)
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558 (skip-chars-forward " \t")
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559 (setq star-start (= (following-char) ?\*))
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560 (skip-chars-backward " \t\n")
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561 (setq end (point))
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562 (beginning-of-line)
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|
563 (skip-chars-forward " \t")
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564 (and (re-search-forward "/\\*[ \t]*" end t)
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565 star-start
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566 (goto-char (1+ (match-beginning 0))))
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567 (current-column))))
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568
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|
569 (defun rexx-comment-indent ()
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|
570 (if (looking-at "^/\\*")
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|
571 0 ;Existing comment at bol stays there.
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|
572 (save-excursion
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|
573 (skip-chars-backward " \t")
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|
574 (max (1+ (current-column)) ;Else indent at comment column
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|
575 comment-column)))) ; except leave at least one space.
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|
576
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|
|
577 (defun rexx-find-matching-do ()
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|
578 "Set mark, look for the \"do\" or \"select\" for the present block."
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|
|
579 (interactive)
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|
580 (set-mark-command nil)
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|
581 (beginning-of-line)
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|
|
582 (goto-char (rexx-find-environment)))
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|
|
583
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|
|
584 (defun rexx-check-expansion ()
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|
|
585 "If abbrev was made within a comment or a string, de-abbrev!"
|
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|
586 (let ((state (rexx-inside-comment-or-string)))
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|
587 (if (or (nth 3 state) (nth 4 state))
|
|
|
588 (unexpand-abbrev))))
|
|
|
589
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|
|
590 (defun rexx-inside-comment-or-string ()
|
|
|
591 "Check if the point is inside a comment or a string.
|
|
|
592 It returns the state from parse-partial-sexp for the search that
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|
593 terminated on the points position"
|
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|
594 (let ((origpoint (point))
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|
|
595 state)
|
|
|
596 (save-excursion
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|
|
597 (goto-char 1)
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|
598 (while (> origpoint (point))
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|
599 (setq state (parse-partial-sexp (point) origpoint 0))))
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|
600 state))
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601
|
|
|
602 (defun rexx-indent-and-newline ()
|
|
|
603 "New newline-and-indent which expands abbrevs before running
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|
|
604 a regular newline-and-indent."
|
|
|
605 (interactive)
|
|
|
606 (if abbrev-mode
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|
|
607 (expand-abbrev))
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|
608 (newline-and-indent))
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|
609
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|
610 (defun rexx-indent-newline-indent ()
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|
|
611 "New newline-and-indent which expands abbrevs and indent the line
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|
|
612 before running a regular newline-and-indent."
|
|
|
613 (interactive)
|
|
|
614 (rexx-indent-command)
|
|
|
615 (if abbrev-mode
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|
|
616 (expand-abbrev))
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|
|
617 (newline-and-indent))
|
