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1 ;;; lisp-mode.el --- Lisp mode, and its idiosyncratic commands.
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2
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3 ;; Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Tinker Systems
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5
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6 ;; Maintainer: FSF
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7 ;; Keywords: lisp, languages
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify it
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12 ;; under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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23 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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24
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25 ;;; Synched up with: FSF 19.30.
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26
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27 ;;; Commentary:
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28
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29 ;; The base major mode for editing Lisp code (used also for Emacs Lisp).
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30 ;; This mode is documented in the Emacs manual
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31
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32 ;;; Code:
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33
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34 (defvar lisp-mode-syntax-table nil "")
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35 (defvar emacs-lisp-mode-syntax-table nil "")
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36 (defvar lisp-mode-abbrev-table nil "")
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37
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38 (defvar lisp-interaction-mode-popup-menu
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39 (purecopy '("Lisp Interaction Menu"
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40 ["Evaluate Last S-expression" eval-last-sexp t]
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41 ["Evaluate Entire Buffer" eval-current-buffer t]
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42 ["Evaluate Region" eval-region (region-exists-p)]
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43 "---"
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44 ["Evaluate This Defun" eval-defun t]
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45 ;; FSF says "Instrument Function for Debugging"
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46 ["Debug This Defun" edebug-defun t]
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47 "---"
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48 ["Trace a Function" trace-function-background t]
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49 ["Untrace All Functions" untrace-all (fboundp 'untrace-all)]
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50 "---"
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51 ["Comment Out Region" comment-region (region-exists-p)]
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52 ["Indent Region" indent-region (region-exists-p)]
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53 ["Indent Line" lisp-indent-line t]
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54 "---"
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55 ["Debug On Error" (setq debug-on-error (not debug-on-error))
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56 :style toggle :selected debug-on-error]
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57 ["Debug On Quit" (setq debug-on-quit (not debug-on-quit))
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58 :style toggle :selected debug-on-quit]
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59 )))
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60
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61 (defvar emacs-lisp-mode-popup-menu
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62 (purecopy
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63 (nconc
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64 '("Emacs-Lisp Menu"
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65 ["Byte-compile This File" emacs-lisp-byte-compile t]
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66 ["Byte-recompile Directory..." byte-recompile-directory t]
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67 "---")
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68 (cdr lisp-interaction-mode-popup-menu))))
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69
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70 ;Don't have a menubar entry in Lisp Interaction mode. Otherwise, the
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71 ;*scratch* buffer has a Lisp menubar item! Very confusing.
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72 ;(defvar lisp-interaction-mode-menubar-menu
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73 ; (purecopy (cons "Lisp" (cdr lisp-interaction-mode-popup-menu))))
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74
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75 (defvar emacs-lisp-mode-menubar-menu
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76 (purecopy (cons "Lisp" (cdr emacs-lisp-mode-popup-menu))))
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77
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78 (if (not emacs-lisp-mode-syntax-table)
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79 (let ((i 0))
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80 (setq emacs-lisp-mode-syntax-table (make-syntax-table))
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81 (while (< i ?0)
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82 (modify-syntax-entry i "_ " emacs-lisp-mode-syntax-table)
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83 (setq i (1+ i)))
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84 (setq i (1+ ?9))
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85 (while (< i ?A)
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86 (modify-syntax-entry i "_ " emacs-lisp-mode-syntax-table)
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87 (setq i (1+ i)))
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88 (setq i (1+ ?Z))
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89 (while (< i ?a)
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90 (modify-syntax-entry i "_ " emacs-lisp-mode-syntax-table)
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91 (setq i (1+ i)))
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92 (setq i (1+ ?z))
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93 (while (< i 128)
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94 (modify-syntax-entry i "_ " emacs-lisp-mode-syntax-table)
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95 (setq i (1+ i)))
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96 (modify-syntax-entry ? " " emacs-lisp-mode-syntax-table)
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97 (modify-syntax-entry ?\t " " emacs-lisp-mode-syntax-table)
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98 (modify-syntax-entry ?\n "> " emacs-lisp-mode-syntax-table)
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99 ;; Give CR the same syntax as newline, for selective-display.
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100 (modify-syntax-entry ?\^m "> " emacs-lisp-mode-syntax-table)
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101 ;; Treat ^L as whitespace.
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102 (modify-syntax-entry ?\f " " emacs-lisp-mode-syntax-table)
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103 (modify-syntax-entry ?\; "< " emacs-lisp-mode-syntax-table)
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104 (modify-syntax-entry ?` "' " emacs-lisp-mode-syntax-table)
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105 (modify-syntax-entry ?' "' " emacs-lisp-mode-syntax-table)
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106 (modify-syntax-entry ?, "' " emacs-lisp-mode-syntax-table)
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107 ;; Used to be singlequote; changed for flonums.
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108 (modify-syntax-entry ?. "_ " emacs-lisp-mode-syntax-table)
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109 (modify-syntax-entry ?# "' " emacs-lisp-mode-syntax-table)
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110 (modify-syntax-entry ?\" "\" " emacs-lisp-mode-syntax-table)
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111 (modify-syntax-entry ?\\ "\\ " emacs-lisp-mode-syntax-table)
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112 (modify-syntax-entry ?\( "() " emacs-lisp-mode-syntax-table)
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113 (modify-syntax-entry ?\) ")( " emacs-lisp-mode-syntax-table)
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114 (modify-syntax-entry ?\[ "(] " emacs-lisp-mode-syntax-table)
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115 (modify-syntax-entry ?\] ")[ " emacs-lisp-mode-syntax-table)))
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116
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117 (if (not lisp-mode-syntax-table)
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118 (progn (setq lisp-mode-syntax-table
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119 (copy-syntax-table emacs-lisp-mode-syntax-table))
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120 (modify-syntax-entry ?\[ "_ " lisp-mode-syntax-table)
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121 (modify-syntax-entry ?\] "_ " lisp-mode-syntax-table)
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122 ;;
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123 ;; If emacs was compiled with NEW_SYNTAX, then do
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124 ;; CL's #| |# block comments.
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125 (if (= 8 (length (parse-partial-sexp (point) (point))))
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126 (progn
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127 (modify-syntax-entry ?# "' 58" lisp-mode-syntax-table)
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128 (modify-syntax-entry ?| ". 67" lisp-mode-syntax-table))
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129 ;; else, old style
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130 (modify-syntax-entry ?\| "\" " lisp-mode-syntax-table))))
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131
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132 (define-abbrev-table 'lisp-mode-abbrev-table ())
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133
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134 ;(defvar lisp-imenu-generic-expression
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135 ; '(
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136 ; (nil
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137 ; "^\\s-*(def\\(un\\|subst\\|macro\\|advice\\)\\s-+\\([-A-Za-z0-9+]+\\)" 2)
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138 ; ("Variables"
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139 ; "^\\s-*(def\\(var\\|const\\)\\s-+\\([-A-Za-z0-9+]+\\)" 2)
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140 ; ("Types"
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141 ; "^\\s-*(def\\(type\\|struct\\|class\\|ine-condition\\)\\s-+\\([-A-Za-z0-9+]+\\)"
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142 ; 2))
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143 ;
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144 ; "Imenu generic expression for Lisp mode. See `imenu-generic-expression'.")
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145
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146 (defun lisp-mode-variables (lisp-syntax)
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147 (if lisp-syntax
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148 (set-syntax-table lisp-mode-syntax-table))
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149 (setq local-abbrev-table lisp-mode-abbrev-table)
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150 (make-local-variable 'paragraph-start)
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151 (setq paragraph-start (concat page-delimiter "\\|$" ))
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152 (make-local-variable 'paragraph-separate)
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153 (setq paragraph-separate paragraph-start)
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154 (make-local-variable 'paragraph-ignore-fill-prefix)
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155 (setq paragraph-ignore-fill-prefix t)
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156 (make-local-variable 'fill-paragraph-function)
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157 (setq fill-paragraph-function 'lisp-fill-paragraph)
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158 (make-local-variable 'indent-line-function)
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159 (setq indent-line-function 'lisp-indent-line)
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160 (make-local-variable 'indent-region-function)
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161 (setq indent-region-function 'lisp-indent-region)
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162 (make-local-variable 'parse-sexp-ignore-comments)
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163 (setq parse-sexp-ignore-comments t)
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164 (make-local-variable 'outline-regexp)
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165 (setq outline-regexp ";;; \\|(....")
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166 (set (make-local-variable 'comment-start) ";")
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167 (set (make-local-variable 'block-comment-start) ";;")
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168 (make-local-variable 'comment-start-skip)
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169 (setq comment-start-skip ";+[ \t]*")
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170 (make-local-variable 'comment-column)
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171 (setq comment-column 40)
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172 (make-local-variable 'comment-indent-function)
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173 (setq comment-indent-function 'lisp-comment-indent)
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174 ; (make-local-variable 'imenu-generic-expression)
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175 ; (setq imenu-generic-expression lisp-imenu-generic-expression)
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176 (set (make-local-variable 'dabbrev-case-fold-search) nil)
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177 (set (make-local-variable 'dabbrev-case-replace) nil)
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178 )
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179
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180
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181 (defvar shared-lisp-mode-map ()
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182 "Keymap for commands shared by all sorts of Lisp modes.")
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183
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184 (if shared-lisp-mode-map
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185 ()
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186 (setq shared-lisp-mode-map (make-sparse-keymap))
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187 (set-keymap-name shared-lisp-mode-map 'shared-lisp-mode-map)
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188 (define-key shared-lisp-mode-map "\e\C-q" 'indent-sexp)
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189 (define-key shared-lisp-mode-map "\177" 'backward-delete-char-untabify)
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190 (define-key shared-lisp-mode-map "\M-;" 'lisp-indent-for-comment))
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191
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192 (defvar emacs-lisp-mode-map ()
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193 "Keymap for Emacs Lisp mode.
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194 All commands in `shared-lisp-mode-map' are inherited by this map.")
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195
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196 (if emacs-lisp-mode-map
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197 ()
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198 (setq emacs-lisp-mode-map (make-sparse-keymap))
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199 (set-keymap-name emacs-lisp-mode-map 'emacs-lisp-mode-map)
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200 (set-keymap-parents emacs-lisp-mode-map (list shared-lisp-mode-map))
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201 (define-key emacs-lisp-mode-map "\e\t" 'lisp-complete-symbol)
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202 (define-key emacs-lisp-mode-map "\e\C-x" 'eval-defun))
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203
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204 (defun emacs-lisp-byte-compile ()
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205 "Byte compile the file containing the current buffer."
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206 (interactive)
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207 (if buffer-file-name
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208 (progn
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209 (save-buffer)
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210 (byte-compile-file buffer-file-name))
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211 (error "The buffer must be saved in a file first.")))
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212
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213 (defun emacs-lisp-mode ()
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214 "Major mode for editing Lisp code to run in Emacs.
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215 Commands:
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216 Delete converts tabs to spaces as it moves back.
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217 Blank lines separate paragraphs. Semicolons start comments.
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218 \\{emacs-lisp-mode-map}
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219 Entry to this mode calls the value of `emacs-lisp-mode-hook'
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220 if that value is non-nil."
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221 (interactive)
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222 (kill-all-local-variables)
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223 (use-local-map emacs-lisp-mode-map)
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224 (set-syntax-table emacs-lisp-mode-syntax-table)
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225 (setq major-mode 'emacs-lisp-mode
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226 mode-popup-menu emacs-lisp-mode-popup-menu
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227 mode-name "Emacs-Lisp")
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228 (if (and (featurep 'menubar)
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229 current-menubar)
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230 (progn
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231 ;; make a local copy of the menubar, so our modes don't
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232 ;; change the global menubar
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233 (set-buffer-menubar current-menubar)
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234 (add-submenu nil emacs-lisp-mode-menubar-menu)))
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235 (lisp-mode-variables nil)
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236 (run-hooks 'emacs-lisp-mode-hook))
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237
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238 (defvar lisp-mode-map ()
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239 "Keymap for ordinary Lisp mode.
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240 All commands in `shared-lisp-mode-map' are inherited by this map.")
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241
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242 (if lisp-mode-map
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243 ()
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244 (setq lisp-mode-map (make-sparse-keymap))
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245 (set-keymap-name lisp-mode-map 'lisp-mode-map)
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246 (set-keymap-parents lisp-mode-map (list shared-lisp-mode-map))
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247 (define-key lisp-mode-map "\e\C-x" 'lisp-send-defun)
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248 ;; gag, no. use ilisp. -jwz
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249 ;; (define-key lisp-mode-map "\C-c\C-z" 'run-lisp)
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250 )
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251
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252 (defun lisp-mode ()
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253 "Major mode for editing Lisp code for Lisps other than GNU Emacs Lisp.
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254 Commands:
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255 Delete converts tabs to spaces as it moves back.
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256 Blank lines separate paragraphs. Semicolons start comments.
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257 \\{lisp-mode-map}
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258 Note that `run-lisp' may be used either to start an inferior Lisp job
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259 or to switch back to an existing one.
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260
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261 Entry to this mode calls the value of `lisp-mode-hook'
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262 if that value is non-nil."
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263 (interactive)
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264 (kill-all-local-variables)
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265 (use-local-map lisp-mode-map)
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266 (setq major-mode 'lisp-mode)
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267 (setq mode-name "Lisp")
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268 (lisp-mode-variables t)
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269 (set-syntax-table lisp-mode-syntax-table)
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270 (run-hooks 'lisp-mode-hook))
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271
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272 ;; This will do unless shell.el is loaded.
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273 (defun lisp-send-defun ()
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274 "Send the current defun to the Lisp process made by \\[run-lisp]."
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275 (interactive)
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276 (error "Process lisp does not exist"))
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277
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278 ;; XEmacs change: emacs-lisp-mode-map is a more appropriate parent.
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279 (defvar lisp-interaction-mode-map nil
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280 "Keymap for Lisp Interaction moe.
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281 All commands in `emacs-lisp-mode-map' are inherited by this map.")
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282
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283 (if lisp-interaction-mode-map
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284 ()
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285 (setq lisp-interaction-mode-map (make-sparse-keymap))
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286 (set-keymap-name lisp-interaction-mode-map 'lisp-interaction-mode-map)
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287 (set-keymap-parents lisp-interaction-mode-map (list emacs-lisp-mode-map))
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288 (define-key lisp-interaction-mode-map "\e\C-x" 'eval-defun)
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289 (define-key lisp-interaction-mode-map "\e\t" 'lisp-complete-symbol)
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290 (define-key lisp-interaction-mode-map "\n" 'eval-print-last-sexp))
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291
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292 (defun lisp-interaction-mode ()
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293 "Major mode for typing and evaluating Lisp forms.
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294 Like Lisp mode except that \\[eval-print-last-sexp] evals the Lisp expression
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295 before point, and prints its value into the buffer, advancing point.
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296
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297 Commands:
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298 Delete converts tabs to spaces as it moves back.
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299 Paragraphs are separated only by blank lines. Semicolons start comments.
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300 \\{lisp-interaction-mode-map}
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301 Entry to this mode calls the value of `lisp-interaction-mode-hook'
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302 if that value is non-nil."
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303 (interactive)
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304 (kill-all-local-variables)
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305 (use-local-map lisp-interaction-mode-map)
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306 (setq major-mode 'lisp-interaction-mode
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307 mode-popup-menu lisp-interaction-mode-popup-menu
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308 mode-name "Lisp Interaction")
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309 (set-syntax-table emacs-lisp-mode-syntax-table)
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310 (lisp-mode-variables nil)
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311 (run-hooks 'lisp-interaction-mode-hook))
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312
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313 (defun eval-print-last-sexp ()
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314 "Evaluate sexp before point; print value into current buffer."
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315 (interactive)
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316 (let ((standard-output (current-buffer)))
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317 (terpri)
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318 (eval-last-sexp t)
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319 (terpri)))
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320
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321 (defun eval-interactive (expr)
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322 "Like `eval' except that it transforms defvars to defconsts."
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323 ;; by Stig@hackvan.com
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324 (if (and (consp expr)
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325 (eq (car expr) 'defvar)
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326 (> (length expr) 2))
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327 (progn (eval (cons 'defconst (cdr expr)))
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328 (message "defvar treated as defconst")
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329 (sit-for 1)
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330 (message ""))
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331 (eval expr)))
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332
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333 (defun eval-last-sexp (eval-last-sexp-arg-internal) ;dynamic scoping wonderment
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334 "Evaluate sexp before point; print value in minibuffer.
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335 With argument, print output into current buffer."
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336 (interactive "P")
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337 (let ((standard-output (if eval-last-sexp-arg-internal (current-buffer) t))
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338 (opoint (point)))
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|
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339 (prin1 (let ((stab (syntax-table)))
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|
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340 (eval-interactive (unwind-protect
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341 (save-excursion
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342 (set-syntax-table emacs-lisp-mode-syntax-table)
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343 (forward-sexp -1)
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|
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344 (save-restriction
|
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345 (narrow-to-region (point-min) opoint)
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|
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346 (read (current-buffer))))
|
|
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347 (set-syntax-table stab)))))))
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|
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348
|
|
|
349 (defun eval-defun (eval-defun-arg-internal) ;dynamic scoping wonderment
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|
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350 "Evaluate defun that point is in or before.
|
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351 Print value in minibuffer.
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|
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352 With argument, insert value in current buffer after the defun."
|
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353 (interactive "P")
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354 (let ((standard-output (if eval-defun-arg-internal (current-buffer) t)))
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355 (prin1 (eval-interactive (save-excursion
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356 (end-of-defun)
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357 (beginning-of-defun)
|
|
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358 (read (current-buffer)))))))
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359
|
|
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360 (defun lisp-comment-indent ()
|
|
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361 (if (looking-at "\\s<\\s<\\s<")
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362 (current-column)
|
|
|
363 (if (looking-at "\\s<\\s<")
|
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364 (let ((tem (calculate-lisp-indent)))
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365 (if (listp tem) (car tem) tem))
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366 (skip-chars-backward " \t")
|
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367 (max (if (bolp) 0 (1+ (current-column)))
|
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368 comment-column))))
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369
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370 (defun lisp-indent-for-comment ()
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371 "Indent this line's comment appropriately, or insert an empty comment.
|
|
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372 If adding a new comment on a blank line, use `block-comment-start' instead
|
|
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373 of `comment-start' to open the comment."
|
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374 ;; by Stig@hackvan.com
|
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375 ;; #### - This functionality, the recognition of block-comment-{start,end},
|
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376 ;; will perhaps be standardized across modes and move to indent-for-comment.
|
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377 (interactive)
|
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|
378 (if (and block-comment-start
|
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|
379 (save-excursion (beginning-of-line) (looking-at "^[ \t]*$")))
|
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|
380 (insert block-comment-start))
|
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381 (indent-for-comment))
|
|
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382
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|
|
383 (defconst lisp-indent-offset nil "")
|
|
|
384 (defconst lisp-indent-function 'lisp-indent-function "")
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|
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385
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|
|
386 (defun lisp-indent-line (&optional whole-exp)
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387 "Indent current line as Lisp code.
|
|
|
388 With argument, indent any additional lines of the same expression
|
|
|
389 rigidly along with this one."
|
|
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390 (interactive "P")
|
|
|
391 (let ((indent (calculate-lisp-indent)) shift-amt beg end
|
|
|
392 (pos (- (point-max) (point))))
|
|
|
393 (beginning-of-line)
|
|
|
394 (setq beg (point))
|
|
|
395 (skip-chars-forward " \t")
|
|
|
396 (if (looking-at "\\s<\\s<\\s<")
|
|
|
397 ;; Don't alter indentation of a ;;; comment line.
|
|
|
398 (goto-char (- (point-max) pos))
|
|
|
399 (if (and (looking-at "\\s<") (not (looking-at "\\s<\\s<")))
|
|
|
400 ;; Single-semicolon comment lines should be indented
|
|
|
401 ;; as comment lines, not as code.
|
|
|
402 (progn (indent-for-comment) (forward-char -1))
|
|
|
403 (if (listp indent) (setq indent (car indent)))
|
|
|
404 (setq shift-amt (- indent (current-column)))
|
|
|
405 (if (zerop shift-amt)
|
|
|
406 nil
|
|
|
407 (delete-region beg (point))
|
|
|
408 (indent-to indent)))
|
|
|
409 ;; If initial point was within line's indentation,
|
|
|
410 ;; position after the indentation. Else stay at same point in text.
|
|
|
411 (if (> (- (point-max) pos) (point))
|
|
|
412 (goto-char (- (point-max) pos)))
|
|
|
413 ;; If desired, shift remaining lines of expression the same amount.
|
|
|
414 (and whole-exp (not (zerop shift-amt))
|
|
|
415 (save-excursion
|
|
|
416 (goto-char beg)
|
|
|
417 (forward-sexp 1)
|
|
|
418 (setq end (point))
|
|
|
419 (goto-char beg)
|
|
|
420 (forward-line 1)
|
|
|
421 (setq beg (point))
|
|
|
422 (> end beg))
|
|
|
423 (indent-code-rigidly beg end shift-amt)))))
|
|
|
424
|
|
|
425 (defvar calculate-lisp-indent-last-sexp)
|
|
|
426
|
|
|
427 (defun calculate-lisp-indent (&optional parse-start)
|
|
|
428 "Return appropriate indentation for current line as Lisp code.
|
|
|
429 In usual case returns an integer: the column to indent to.
|
|
|
430 Can instead return a list, whose car is the column to indent to.
|
|
|
431 This means that following lines at the same level of indentation
|
|
|
432 should not necessarily be indented the same way.
|
|
|
433 The second element of the list is the buffer position
|
|
|
434 of the start of the containing expression."
|
|
|
435 (save-excursion
|
|
|
436 (beginning-of-line)
|
|
|
437 (let ((indent-point (point))
|
|
|
438 state ;;paren-depth
|
|
|
439 ;; setting this to a number inhibits calling hook
|
|
|
440 (desired-indent nil)
|
|
|
441 (retry t)
|
|
|
442 calculate-lisp-indent-last-sexp containing-sexp)
|
|
|
443 (if parse-start
|
|
|
444 (goto-char parse-start)
|
|
|
445 (beginning-of-defun))
|
|
|
446 ;; Find outermost containing sexp
|
|
|
447 (while (< (point) indent-point)
|
|
|
448 (setq state (parse-partial-sexp (point) indent-point 0)))
|
|
|
449 ;; Find innermost containing sexp
|
|
|
450 (while (and retry
|
|
|
451 state
|
|
|
452 (> ;;(setq paren-depth (elt state 0))
|
|
|
453 (elt state 0)
|
|
|
454 0))
|
|
|
455 (setq retry nil)
|
|
|
456 (setq calculate-lisp-indent-last-sexp (elt state 2))
|
|
|
457 (setq containing-sexp (elt state 1))
|
|
|
458 ;; Position following last unclosed open.
|
|
|
459 (goto-char (1+ containing-sexp))
|
|
|
460 ;; Is there a complete sexp since then?
|
|
|
461 (if (and calculate-lisp-indent-last-sexp
|
|
|
462 (> calculate-lisp-indent-last-sexp (point)))
|
|
|
463 ;; Yes, but is there a containing sexp after that?
|
|
|
464 (let ((peek (parse-partial-sexp calculate-lisp-indent-last-sexp
|
|
|
465 indent-point 0)))
|
|
|
466 (if (setq retry (car (cdr peek))) (setq state peek)))))
|
|
|
467 (if retry
|
|
|
468 nil
|
|
|
469 ;; Innermost containing sexp found
|
|
|
470 (goto-char (1+ containing-sexp))
|
|
|
471 (if (not calculate-lisp-indent-last-sexp)
|
|
|
472 ;; indent-point immediately follows open paren.
|
|
|
473 ;; Don't call hook.
|
|
|
474 (setq desired-indent (current-column))
|
|
|
475 ;; Find the start of first element of containing sexp.
|
|
|
476 (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
|
|
|
477 (cond ((looking-at "\\s(")
|
|
|
478 ;; First element of containing sexp is a list.
|
|
|
479 ;; Indent under that list.
|
|
|
480 )
|
|
|
481 ((> (save-excursion (forward-line 1) (point))
|
|
|
482 calculate-lisp-indent-last-sexp)
|
|
|
483 ;; This is the first line to start within the containing sexp.
|
|
|
484 ;; It's almost certainly a function call.
|
|
|
485 (if (= (point) calculate-lisp-indent-last-sexp)
|
|
|
486 ;; Containing sexp has nothing before this line
|
|
|
487 ;; except the first element. Indent under that element.
|
|
|
488 nil
|
|
|
489 ;; Skip the first element, find start of second (the first
|
|
|
490 ;; argument of the function call) and indent under.
|
|
|
491 (progn (forward-sexp 1)
|
|
|
492 (parse-partial-sexp (point)
|
|
|
493 calculate-lisp-indent-last-sexp
|
|
|
494 0 t)))
|
|
|
495 (backward-prefix-chars))
|
|
|
496 (t
|
|
|
497 ;; Indent beneath first sexp on same line as
|
|
|
498 ;; calculate-lisp-indent-last-sexp. Again, it's
|
|
|
499 ;; almost certainly a function call.
|
|
|
500 (goto-char calculate-lisp-indent-last-sexp)
|
|
|
501 (beginning-of-line)
|
|
|
502 (parse-partial-sexp (point) calculate-lisp-indent-last-sexp
|
|
|
503 0 t)
|
|
|
504 (backward-prefix-chars)))))
|
|
|
505 ;; Point is at the point to indent under unless we are inside a string.
|
|
|
506 ;; Call indentation hook except when overridden by lisp-indent-offset
|
|
|
507 ;; or if the desired indentation has already been computed.
|
|
|
508 (let ((normal-indent (current-column)))
|
|
|
509 (cond ((elt state 3)
|
|
|
510 ;; Inside a string, don't change indentation.
|
|
|
511 (goto-char indent-point)
|
|
|
512 (skip-chars-forward " \t")
|
|
|
513 (current-column))
|
|
|
514 (desired-indent)
|
|
|
515 ((and (boundp 'lisp-indent-function)
|
|
|
516 lisp-indent-function
|
|
|
517 (not retry))
|
|
|
518 (or (funcall lisp-indent-function indent-point state)
|
|
|
519 normal-indent))
|
|
|
520 ;; lisp-indent-offset shouldn't override lisp-indent-function !
|
|
|
521 ((and (integerp lisp-indent-offset) containing-sexp)
|
|
|
522 ;; Indent by constant offset
|
|
|
523 (goto-char containing-sexp)
|
|
|
524 (+ normal-indent lisp-indent-offset))
|
|
|
525 (t
|
|
|
526 normal-indent))))))
|
|
|
527
|
|
|
528 (defun lisp-indent-function (indent-point state)
|
|
|
529 ;; free reference to `calculate-lisp-indent-last-sexp'
|
|
|
530 ;; in #'calculate-lisp-indent
|
|
|
531 (let ((normal-indent (current-column)))
|
|
|
532 (goto-char (1+ (elt state 1)))
|
|
|
533 (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
|
|
|
534 (if (and (elt state 2)
|
|
|
535 (not (looking-at "\\sw\\|\\s_")))
|
|
|
536 ;; car of form doesn't seem to be a a symbol
|
|
|
537 (progn
|
|
|
538 (if (not (> (save-excursion (forward-line 1) (point))
|
|
|
539 calculate-lisp-indent-last-sexp))
|
|
|
540 (progn (goto-char calculate-lisp-indent-last-sexp)
|
|
|
541 (beginning-of-line)
|
|
|
542 (parse-partial-sexp (point)
|
|
|
543 calculate-lisp-indent-last-sexp 0 t)))
|
|
|
544 ;; Indent under the list or under the first sexp on the same
|
|
|
545 ;; line as calculate-lisp-indent-last-sexp. Note that first
|
|
|
546 ;; thing on that line has to be complete sexp since we are
|
|
|
547 ;; inside the innermost containing sexp.
|
|
|
548 (backward-prefix-chars)
|
|
|
549 (current-column))
|
|
|
550 (let ((function (buffer-substring (point)
|
|
|
551 (progn (forward-sexp 1) (point))))
|
|
|
552 method)
|
|
|
553 (setq method (or (get (intern-soft function) 'lisp-indent-function)
|
|
|
554 (get (intern-soft function) 'lisp-indent-hook)))
|
|
|
555 (cond ((or (eq method 'defun)
|
|
|
556 (and (null method)
|
|
|
557 (> (length function) 3)
|
|
|
558 (string-match "\\`def" function)))
|
|
|
559 (lisp-indent-defform state indent-point))
|
|
|
560 ((integerp method)
|
|
|
561 (lisp-indent-specform method state
|
|
|
562 indent-point normal-indent))
|
|
|
563 (method
|
|
|
564 (funcall method state indent-point)))))))
|
|
|
565
|
|
|
566 (defconst lisp-body-indent 2
|
|
|
567 "Number of columns to indent the second line of a `(def...)' form.")
|
|
|
568
|
|
|
569 (defun lisp-indent-specform (count state indent-point normal-indent)
|
|
|
570 (let ((containing-form-start (elt state 1))
|
|
|
571 (i count)
|
|
|
572 body-indent containing-form-column)
|
|
|
573 ;; Move to the start of containing form, calculate indentation
|
|
|
574 ;; to use for non-distinguished forms (> count), and move past the
|
|
|
575 ;; function symbol. lisp-indent-function guarantees that there is at
|
|
|
576 ;; least one word or symbol character following open paren of containing
|
|
|
577 ;; form.
|
|
|
578 (goto-char containing-form-start)
|
|
|
579 (setq containing-form-column (current-column))
|
|
|
580 (setq body-indent (+ lisp-body-indent containing-form-column))
|
|
|
581 (forward-char 1)
|
|
|
582 (forward-sexp 1)
|
|
|
583 ;; Now find the start of the last form.
|
|
|
584 (parse-partial-sexp (point) indent-point 1 t)
|
|
|
585 (while (and (< (point) indent-point)
|
|
|
586 (condition-case ()
|
|
|
587 (progn
|
|
|
588 (setq count (1- count))
|
|
|
589 (forward-sexp 1)
|
|
|
590 (parse-partial-sexp (point) indent-point 1 t))
|
|
|
591 (error nil))))
|
|
|
592 ;; Point is sitting on first character of last (or count) sexp.
|
|
|
593 (if (> count 0)
|
|
|
594 ;; A distinguished form. If it is the first or second form use double
|
|
|
595 ;; lisp-body-indent, else normal indent. With lisp-body-indent bound
|
|
|
596 ;; to 2 (the default), this just happens to work the same with if as
|
|
|
597 ;; the older code, but it makes unwind-protect, condition-case,
|
|
|
598 ;; with-output-to-temp-buffer, et. al. much more tasteful. The older,
|
|
|
599 ;; less hacked, behavior can be obtained by replacing below with
|
|
|
600 ;; (list normal-indent containing-form-start).
|
|
|
601 (if (<= (- i count) 1)
|
|
|
602 (list (+ containing-form-column (* 2 lisp-body-indent))
|
|
|
603 containing-form-start)
|
|
|
604 (list normal-indent containing-form-start))
|
|
|
605 ;; A non-distinguished form. Use body-indent if there are no
|
|
|
606 ;; distinguished forms and this is the first undistinguished form,
|
|
|
607 ;; or if this is the first undistinguished form and the preceding
|
|
|
608 ;; distinguished form has indentation at least as great as body-indent.
|
|
|
609 (if (or (and (= i 0) (= count 0))
|
|
|
610 (and (= count 0) (<= body-indent normal-indent)))
|
|
|
611 body-indent
|
|
|
612 normal-indent))))
|
|
|
613
|
|
|
614 (defun lisp-indent-defform (state indent-point)
|
|
|
615 (goto-char (car (cdr state)))
|
|
|
616 (forward-line 1)
|
|
|
617 (if (> (point) (car (cdr (cdr state))))
|
|
|
618 (progn
|
|
|
619 (goto-char (car (cdr state)))
|
|
|
620 (+ lisp-body-indent (current-column)))))
|
|
|
621
|
|
|
622
|
|
|
623 ;; (put 'progn 'lisp-indent-function 0), say, causes progn to be indented
|
|
|
624 ;; like defun if the first form is placed on the next line, otherwise
|
|
|
625 ;; it is indented like any other form (i.e. forms line up under first).
|
|
|
626
|
|
|
627 (put 'lambda 'lisp-indent-function 'defun)
|
|
|
628 (put 'autoload 'lisp-indent-function 'defun)
|
|
|
629 (put 'progn 'lisp-indent-function 0)
|
|
|
630 (put 'prog1 'lisp-indent-function 1)
|
|
|
631 (put 'prog2 'lisp-indent-function 2)
|
|
|
632 (put 'save-excursion 'lisp-indent-function 0)
|
|
|
633 (put 'save-window-excursion 'lisp-indent-function 0)
|
|
|
634 (put 'save-selected-window 'lisp-indent-function 0)
|
|
|
635 (put 'save-restriction 'lisp-indent-function 0)
|
|
|
636 (put 'save-match-data 'lisp-indent-function 0)
|
|
|
637 (put 'let 'lisp-indent-function 1)
|
|
|
638 (put 'let* 'lisp-indent-function 1)
|
|
|
639 (put 'while 'lisp-indent-function 1)
|
|
|
640 (put 'if 'lisp-indent-function 2)
|
|
|
641 (put 'catch 'lisp-indent-function 1)
|
|
|
642 (put 'condition-case 'lisp-indent-function 2)
|
|
|
643 (put 'unwind-protect 'lisp-indent-function 1)
|
|
|
644 (put 'with-output-to-temp-buffer 'lisp-indent-function 1)
|
|
|
645
|
|
|
646 (defun indent-sexp (&optional endpos)
|
|
|
647 "Indent each line of the list starting just after point.
|
|
|
648 If optional arg ENDPOS is given, indent each line, stopping when
|
|
|
649 ENDPOS is encountered."
|
|
|
650 (interactive)
|
|
|
651 (let ((indent-stack (list nil))
|
|
|
652 (next-depth 0)
|
|
|
653 ;; If ENDPOS is non-nil, use nil as STARTING-POINT
|
|
|
654 ;; so that calculate-lisp-indent will find the beginning of
|
|
|
655 ;; the defun we are in.
|
|
|
656 ;; If ENDPOS is nil, it is safe not to scan before point
|
|
|
657 ;; since every line we indent is more deeply nested than point is.
|
|
|
658 (starting-point (if endpos nil (point)))
|
|
|
659 (last-point (point))
|
|
|
660 last-depth
|
|
|
661 bol
|
|
|
662 (outer-loop-done nil)
|
|
|
663 inner-loop-done
|
|
|
664 state
|
|
|
665 this-indent)
|
|
|
666 ;; Get error now if we don't have a complete sexp after point.
|
|
|
667 (or endpos
|
|
|
668 ;; Get error now if we don't have a complete sexp after point.
|
|
|
669 (save-excursion (forward-sexp 1)))
|
|
|
670 (save-excursion
|
|
|
671 (setq outer-loop-done nil)
|
|
|
672 (while (if endpos (< (point) endpos)
|
|
|
673 (not outer-loop-done))
|
|
|
674 (setq last-depth next-depth
|
|
|
675 inner-loop-done nil)
|
|
|
676 ;; Parse this line so we can learn the state
|
|
|
677 ;; to indent the next line.
|
|
|
678 ;; This inner loop goes through only once
|
|
|
679 ;; unless a line ends inside a string.
|
|
|
680 (while (and (not inner-loop-done)
|
|
|
681 (not (setq outer-loop-done (eobp))))
|
|
|
682 (setq state (parse-partial-sexp (point) (progn (end-of-line) (point))
|
|
|
683 nil nil state))
|
|
|
684 (setq next-depth (car state))
|
|
|
685 ;; If the line contains a comment other than the sort
|
|
|
686 ;; that is indented like code,
|
|
|
687 ;; indent it now with indent-for-comment.
|
|
|
688 ;; Comments indented like code are right already.
|
|
|
689 ;; In any case clear the in-comment flag in the state
|
|
|
690 ;; because parse-partial-sexp never sees the newlines.
|
|
|
691 (if (car (nthcdr 4 state))
|
|
|
692 (progn (indent-for-comment)
|
|
|
693 (end-of-line)
|
|
|
694 (setcar (nthcdr 4 state) nil)))
|
|
|
695 ;; If this line ends inside a string,
|
|
|
696 ;; go straight to next line, remaining within the inner loop,
|
|
|
697 ;; and turn off the \-flag.
|
|
|
698 (if (car (nthcdr 3 state))
|
|
|
699 (progn
|
|
|
700 (forward-line 1)
|
|
|
701 (setcar (nthcdr 5 state) nil))
|
|
|
702 (setq inner-loop-done t)))
|
|
|
703 ; Chuck had a comment here saying that the alternate code
|
|
|
704 ; (the next sexp after this one) led to an infine loop.
|
|
|
705 ; Since merging some changes in from FSF 19.30, I'm going
|
|
|
706 ; to try going the FSF way and see what happens.
|
|
|
707 ; (and endpos
|
|
|
708 ; (while (<= next-depth 0) ;XEmacs change
|
|
|
709 ; (setq indent-stack (append indent-stack (list nil)))
|
|
|
710 ; (setq next-depth (1+ next-depth))
|
|
|
711 ; (setq last-depth (1+ last-depth))))
|
|
|
712 (and endpos
|
|
|
713 (<= next-depth 0)
|
|
|
714 (progn
|
|
|
715 (setq indent-stack (append indent-stack
|
|
|
716 (make-list (- next-depth) nil))
|
|
|
717 last-depth (- last-depth next-depth)
|
|
|
718 next-depth 0)))
|
|
|
719 (or outer-loop-done endpos
|
|
|
720 (setq outer-loop-done (<= next-depth 0)))
|
|
|
721 (if outer-loop-done
|
|
|
722 (forward-line 1)
|
|
|
723 (while (> last-depth next-depth)
|
|
|
724 (setq indent-stack (cdr indent-stack)
|
|
|
725 last-depth (1- last-depth)))
|
|
|
726 (while (< last-depth next-depth)
|
|
|
727 (setq indent-stack (cons nil indent-stack)
|
|
|
728 last-depth (1+ last-depth)))
|
|
|
729 ;; Now go to the next line and indent it according
|
|
|
730 ;; to what we learned from parsing the previous one.
|
|
|
731 (forward-line 1)
|
|
|
732 (setq bol (point))
|
|
|
733 (skip-chars-forward " \t")
|
|
|
734 ;; But not if the line is blank, or just a comment
|
|
|
735 ;; (except for double-semi comments; indent them as usual).
|
|
|
736 (if (or (eobp) (looking-at "\\s<\\|\n"))
|
|
|
737 nil
|
|
|
738 (if (and (car indent-stack)
|
|
|
739 (>= (car indent-stack) 0))
|
|
|
740 (setq this-indent (car indent-stack))
|
|
|
741 (let ((val (calculate-lisp-indent
|
|
|
742 (if (car indent-stack)
|
|
|
743 (- (car indent-stack))
|
|
|
744 starting-point))))
|
|
|
745 (if (integerp val)
|
|
|
746 (setcar indent-stack
|
|
|
747 (setq this-indent val))
|
|
|
748 (setcar indent-stack (- (car (cdr val))))
|
|
|
749 (setq this-indent (car val)))))
|
|
|
750 (if (/= (current-column) this-indent)
|
|
|
751 (progn (delete-region bol (point))
|
|
|
752 (indent-to this-indent)))))
|
|
|
753 (or outer-loop-done
|
|
|
754 (setq outer-loop-done (= (point) last-point))
|
|
|
755 (setq last-point (point)))))))
|
|
|
756
|
|
|
757 ;; Indent every line whose first char is between START and END inclusive.
|
|
|
758 (defun lisp-indent-region (start end)
|
|
|
759 (save-excursion
|
|
|
760 (let ((endmark (copy-marker end)))
|
|
|
761 (goto-char start)
|
|
|
762 (and (bolp) (not (eolp))
|
|
|
763 (lisp-indent-line))
|
|
|
764 (indent-sexp endmark)
|
|
|
765 (set-marker endmark nil))))
|
|
|
766
|
|
|
767
|
|
|
768 ;;;; Lisp paragraph filling commands.
|
|
|
769
|
|
|
770 (defun lisp-fill-paragraph (&optional justify)
|
|
|
771 "Like \\[fill-paragraph], but handle Emacs Lisp comments.
|
|
|
772 If any of the current line is a comment, fill the comment or the
|
|
|
773 paragraph of it that point is in, preserving the comment's indentation
|
|
|
774 and initial semicolons."
|
|
|
775 (interactive "P")
|
|
|
776 (let (
|
|
|
777 ;; Non-nil if the current line contains a comment.
|
|
|
778 has-comment
|
|
|
779
|
|
|
780 ;; If has-comment, the appropriate fill-prefix for the comment.
|
|
|
781 comment-fill-prefix
|
|
|
782 )
|
|
|
783
|
|
|
784 ;; Figure out what kind of comment we are looking at.
|
|
|
785 (save-excursion
|
|
|
786 (beginning-of-line)
|
|
|
787 (cond
|
|
|
788
|
|
|
789 ;; A line with nothing but a comment on it?
|
|
|
790 ((looking-at "[ \t]*;[; \t]*")
|
|
|
791 (setq has-comment t
|
|
|
792 comment-fill-prefix (buffer-substring (match-beginning 0)
|
|
|
793 (match-end 0))))
|
|
|
794
|
|
|
795 ;; A line with some code, followed by a comment? Remember that the
|
|
|
796 ;; semi which starts the comment shouldn't be part of a string or
|
|
|
797 ;; character.
|
|
|
798 ((progn
|
|
|
799 (while (not (looking-at ";\\|$"))
|
|
|
800 (skip-chars-forward "^;\n\"\\\\?")
|
|
|
801 (cond
|
|
|
802 ((eq (char-after (point)) ?\\) (forward-char 2))
|
|
|
803 ((memq (char-after (point)) '(?\" ??)) (forward-sexp 1))))
|
|
|
804 (looking-at ";+[\t ]*"))
|
|
|
805 (setq has-comment t)
|
|
|
806 (setq comment-fill-prefix
|
|
|
807 (concat (make-string (current-column) ? )
|
|
|
808 (buffer-substring (match-beginning 0) (match-end 0)))))))
|
|
|
809
|
|
|
810 (if (not has-comment)
|
|
|
811 (fill-paragraph justify)
|
|
|
812
|
|
|
813 ;; Narrow to include only the comment, and then fill the region.
|
|
|
814 (save-restriction
|
|
|
815 (narrow-to-region
|
|
|
816 ;; Find the first line we should include in the region to fill.
|
|
|
817 (save-excursion
|
|
|
818 (while (and (zerop (forward-line -1))
|
|
|
819 (looking-at "^[ \t]*;")))
|
|
|
820 ;; We may have gone to far. Go forward again.
|
|
|
821 (or (looking-at "^[ \t]*;")
|
|
|
822 (forward-line 1))
|
|
|
823 (point))
|
|
|
824 ;; Find the beginning of the first line past the region to fill.
|
|
|
825 (save-excursion
|
|
|
826 (while (progn (forward-line 1)
|
|
|
827 (looking-at "^[ \t]*;")))
|
|
|
828 (point)))
|
|
|
829
|
|
|
830 ;; Lines with only semicolons on them can be paragraph boundaries.
|
|
|
831 (let ((paragraph-start (concat paragraph-start "\\|[ \t;]*$"))
|
|
|
832 (paragraph-separate (concat paragraph-start "\\|[ \t;]*$"))
|
|
|
833 (fill-prefix comment-fill-prefix))
|
|
|
834 (fill-paragraph justify))))
|
|
|
835 t))
|
|
|
836
|
|
|
837
|
|
|
838 (defun indent-code-rigidly (start end arg &optional nochange-regexp)
|
|
|
839 "Indent all lines of code, starting in the region, sideways by ARG columns.
|
|
|
840 Does not affect lines starting inside comments or strings,
|
|
|
841 assuming that the start of the region is not inside them.
|
|
|
842 Called from a program, takes args START, END, COLUMNS and NOCHANGE-REGEXP.
|
|
|
843 The last is a regexp which, if matched at the beginning of a line,
|
|
|
844 means don't indent that line."
|
|
|
845 (interactive "r\np")
|
|
|
846 (let (state)
|
|
|
847 (save-excursion
|
|
|
848 (goto-char end)
|
|
|
849 (setq end (point-marker))
|
|
|
850 (goto-char start)
|
|
|
851 (or (bolp)
|
|
|
852 (setq state (parse-partial-sexp (point)
|
|
|
853 (progn
|
|
|
854 (forward-line 1) (point))
|
|
|
855 nil nil state)))
|
|
|
856 (while (< (point) end)
|
|
|
857 (or (car (nthcdr 3 state))
|
|
|
858 (and nochange-regexp
|
|
|
859 (looking-at nochange-regexp))
|
|
|
860 ;; If line does not start in string, indent it
|
|
|
861 (let ((indent (current-indentation)))
|
|
|
862 (delete-region (point) (progn (skip-chars-forward " \t") (point)))
|
|
|
863 (or (eolp)
|
|
|
864 (indent-to (max 0 (+ indent arg)) 0))))
|
|
|
865 (setq state (parse-partial-sexp (point)
|
|
|
866 (progn
|
|
|
867 (forward-line 1) (point))
|
|
|
868 nil nil state))))))
|
|
|
869
|
|
|
870 (provide 'lisp-mode)
|
|
|
871
|
|
|
872 ;;; lisp-mode.el ends here
|
