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1 ;;; hide-ifdef-mode.el --- hides selected code within ifdef.
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3 ;; Copyright (C) 1988, 1994 Free Software Foundation, Inc.
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5 ;; Author: Dan LaLiberte <liberte@a.cs.uiuc.edu>
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6 ;; Maintainer: FSF
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7 ;; Keywords: c, outlines
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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, Inc., 59 Temple Place - Suite 330, Boston, MA
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24 ;; 02111-1307, USA.
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25
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26 ;;; Synched up with: FSF 19.34.
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27
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28 ;;; Commentary:
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29
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30 ;; To initialize, toggle the hide-ifdef minor mode with
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31 ;;
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32 ;; M-x hide-ifdef-mode
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33 ;;
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34 ;; This will set up key bindings and call hide-ifdef-mode-hook if it
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35 ;; has a value. To explicitly hide ifdefs using a buffer-local
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36 ;; define list (default empty), type
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37 ;;
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38 ;; M-x hide-ifdefs or C-c @ h
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39 ;;
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40 ;; Hide-ifdef suppresses the display of code that the preprocessor wouldn't
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41 ;; pass through. The support of constant expressions in #if lines is
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42 ;; limited to identifiers, parens, and the operators: &&, ||, !, and
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43 ;; "defined". Please extend this.
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44 ;;
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45 ;; The hidden code is marked by ellipses (...). Be
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46 ;; cautious when editing near ellipses, since the hidden text is
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47 ;; still in the buffer, and you can move the point into it and modify
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48 ;; text unawares. If you don't want to see the ellipses, set
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49 ;; selective-display-ellipses to nil. But this can be dangerous.
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50 ;; You can make your buffer read-only while hide-ifdef-hiding by setting
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51 ;; hide-ifdef-read-only to a non-nil value. You can toggle this
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52 ;; variable with hide-ifdef-toggle-read-only (C-c @ C-q).
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53 ;;
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54 ;; You can undo the effect of hide-ifdefs by typing
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55 ;;
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56 ;; M-x show-ifdefs or C-c @ s
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57 ;;
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58 ;; Use M-x hide-ifdef-define (C-c @ d) to define a symbol.
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59 ;; Use M-x hide-ifdef-undef (C-c @ u) to undefine a symbol.
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60 ;;
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61 ;; If you define or undefine a symbol while hide-ifdef-mode is in effect,
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62 ;; the display will be updated. Only the define list for the current
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63 ;; buffer will be affected. You can save changes to the local define
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64 ;; list with hide-ifdef-set-define-alist. This adds entries
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65 ;; to hide-ifdef-define-alist.
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66 ;;
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67 ;; If you have defined a hide-ifdef-mode-hook, you can set
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68 ;; up a list of symbols that may be used by hide-ifdefs as in the
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69 ;; following example:
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70 ;;
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71 ;; (setq hide-ifdef-mode-hook
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72 ;; '(lambda ()
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73 ;; (if (not hide-ifdef-define-alist)
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74 ;; (setq hide-ifdef-define-alist
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75 ;; '((list1 ONE TWO)
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76 ;; (list2 TWO THREE)
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77 ;; )))
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78 ;; (hide-ifdef-use-define-alist 'list2) ; use list2 by default
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79 ;; ))
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80 ;;
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81 ;; You can call hide-ifdef-use-define-alist (C-c u) at any time to specify
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82 ;; another list to use.
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83 ;;
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84 ;; To cause ifdefs to be hidden as soon as hide-ifdef-mode is called,
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85 ;; set hide-ifdef-initially to non-nil.
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86 ;;
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87 ;; If you set hide-ifdef-lines to t, hide-ifdefs hides all the #ifdef lines.
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88 ;; In the absence of highlighting, that might be a bad idea. If you set
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89 ;; hide-ifdef-lines to nil (the default), the surrounding preprocessor
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90 ;; lines will be displayed. That can be confusing in its own
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91 ;; right. Other variations on display are possible, but not much
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92 ;; better.
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93 ;;
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94 ;; You can explicitly hide or show individual ifdef blocks irrespective
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95 ;; of the define list by using hide-ifdef-block and show-ifdef-block.
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96 ;;
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97 ;; You can move the point between ifdefs with forward-ifdef, backward-ifdef,
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98 ;; up-ifdef, down-ifdef, next-ifdef, and previous-ifdef.
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99 ;;
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100 ;; If you have minor-mode-alist in your mode line (the default) two labels
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101 ;; may appear. "Ifdef" will appear when hide-ifdef-mode is active. "Hiding"
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102 ;; will appear when text may be hidden ("hide-ifdef-hiding" is non-nil).
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103 ;;
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104 ;; Written by Brian Marick, at Gould, Computer Systems Division, Urbana IL.
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105 ;; Extensively modified by Daniel LaLiberte (while at Gould).
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106 ;;
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107 ;; You may freely modify and distribute this, but keep a record
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108 ;; of modifications and send comments to:
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109 ;; liberte@a.cs.uiuc.edu or ihnp4!uiucdcs!liberte
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110 ;; I will continue to upgrade hide-ifdef-mode
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111 ;; with your contributions.
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112
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113 ;;; Code:
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114
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115 (require 'cc-mode)
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116
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117 (defvar hide-ifdef-mode-submap nil
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118 "Keymap used with Hide-Ifdef mode.")
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119
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120 (defvar hide-ifdef-mode-map nil
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121 "Keymap used with Hide-Ifdef mode.")
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122
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123 (defconst hide-ifdef-mode-prefix-key "\C-c@"
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124 "Prefix key for all Hide-Ifdef mode commands.")
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125
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126 ;; Set up the submap that goes after the prefix key.
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127 (if hide-ifdef-mode-submap
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128 () ; Don't redefine it.
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129 (setq hide-ifdef-mode-submap (make-sparse-keymap))
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130 (define-key hide-ifdef-mode-submap "d" 'hide-ifdef-define)
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131 (define-key hide-ifdef-mode-submap "u" 'hide-ifdef-undef)
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132 (define-key hide-ifdef-mode-submap "D" 'hide-ifdef-set-define-alist)
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133 (define-key hide-ifdef-mode-submap "U" 'hide-ifdef-use-define-alist)
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134
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135 (define-key hide-ifdef-mode-submap "h" 'hide-ifdefs)
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136 (define-key hide-ifdef-mode-submap "s" 'show-ifdefs)
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137 (define-key hide-ifdef-mode-submap "\C-d" 'hide-ifdef-block)
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138 (define-key hide-ifdef-mode-submap "\C-s" 'show-ifdef-block)
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139
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140 (define-key hide-ifdef-mode-submap "\C-q" 'hide-ifdef-toggle-read-only)
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141 (let ((where (where-is-internal 'toggle-read-only '(keymap) t)))
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142 (if where
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143 (define-key hide-ifdef-mode-submap
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144 where
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145 'hide-ifdef-toggle-outside-read-only)))
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146 )
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147
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148 ;; Set up the mode's main map, which leads via the prefix key to the submap.
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149 (if hide-ifdef-mode-map
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150 ()
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151 (setq hide-ifdef-mode-map (make-sparse-keymap))
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152 (define-key hide-ifdef-mode-map hide-ifdef-mode-prefix-key
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153 hide-ifdef-mode-submap))
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154
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155 (defvar hide-ifdef-mode nil
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156 "Non-nil when hide-ifdef-mode is activated.")
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157
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158 (defvar hide-ifdef-hiding nil
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159 "Non-nil when text may be hidden.")
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160
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161 (or (assq 'hide-ifdef-hiding minor-mode-alist)
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162 (setq minor-mode-alist
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163 (cons '(hide-ifdef-hiding " Hiding")
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164 minor-mode-alist)))
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165
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166 ;(or (assq 'hide-ifdef-mode minor-mode-alist)
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167 ; (setq minor-mode-alist
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168 ; (cons '(hide-ifdef-mode " Ifdef")
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169 ; minor-mode-alist)))
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170 ;; XEmacs: do it right.
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171 ;;;###autoload
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172 (add-minor-mode 'hide-ifdef-mode " Ifdef")
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173
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174 ;; fix c-mode syntax table so we can recognize whole symbols.
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175 (defvar hide-ifdef-syntax-table
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176 (copy-syntax-table c-mode-syntax-table)
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177 "Syntax table used for tokenizing #if expressions.")
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178
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179 (modify-syntax-entry ?_ "w" hide-ifdef-syntax-table)
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180 (modify-syntax-entry ?& "." hide-ifdef-syntax-table)
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181 (modify-syntax-entry ?\| "." hide-ifdef-syntax-table)
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182
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183 ;;;###autoload
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184 (defun hide-ifdef-mode (arg)
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185 "Toggle Hide-Ifdef mode. This is a minor mode, albeit a large one.
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186 With ARG, turn Hide-Ifdef mode on if arg is positive, off otherwise.
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187 In Hide-Ifdef mode, code within #ifdef constructs that the C preprocessor
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188 would eliminate may be hidden from view. Several variables affect
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189 how the hiding is done:
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190
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191 hide-ifdef-env
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192 An association list of defined and undefined symbols for the
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193 current buffer. Initially, the global value of `hide-ifdef-env'
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194 is used.
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195
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196 hide-ifdef-define-alist
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197 An association list of defined symbol lists.
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198 Use `hide-ifdef-set-define-alist' to save the current `hide-ifdef-env'
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199 and `hide-ifdef-use-define-alist' to set the current `hide-ifdef-env'
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200 from one of the lists in `hide-ifdef-define-alist'.
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201
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202 hide-ifdef-lines
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203 Set to non-nil to not show #if, #ifdef, #ifndef, #else, and
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204 #endif lines when hiding.
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205
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206 hide-ifdef-initially
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207 Indicates whether `hide-ifdefs' should be called when Hide-Ifdef mode
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208 is activated.
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209
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210 hide-ifdef-read-only
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211 Set to non-nil if you want to make buffers read only while hiding.
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212 After `show-ifdefs', read-only status is restored to previous value.
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213
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214 \\{hide-ifdef-mode-map}"
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215
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216 (interactive "P")
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217 (make-local-variable 'hide-ifdef-mode)
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218 (setq hide-ifdef-mode
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219 (if (null arg)
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220 (not hide-ifdef-mode)
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221 (> (prefix-numeric-value arg) 0)))
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222
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223 ;; XEmacs change
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224 (redraw-modeline)
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225
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226 (if hide-ifdef-mode
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227 (progn
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228 ; fix c-mode syntax table so we can recognize whole symbols.
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229 ;; XEmacs: Maybe we don't need this any more with cc-mode? -sb
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230 ;; (modify-syntax-entry ?_ "w")
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231 ;; (modify-syntax-entry ?& ".")
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232 ;; (modify-syntax-entry ?\| ".")
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233
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234 ; inherit global values
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235 (make-local-variable 'hide-ifdef-env)
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236 (setq hide-ifdef-env (default-value 'hide-ifdef-env))
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237
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238 (make-local-variable 'hide-ifdef-hiding)
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239 (setq hide-ifdef-hiding (default-value 'hide-ifdef-hiding))
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240
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241 (make-local-variable 'hif-outside-read-only)
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242 (setq hif-outside-read-only buffer-read-only)
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243
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244 (run-hooks 'hide-ifdef-mode-hook)
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245
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246 (if hide-ifdef-initially
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247 (hide-ifdefs)
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248 (show-ifdefs))
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249 (message "Enter Hide-Ifdef mode")
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250 )
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251 ; else end hide-ifdef-mode
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252 (if hide-ifdef-hiding
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253 (show-ifdefs))
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254 (message "Exit Hide-Ifdef mode")
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255 ))
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256
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257
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258 ;; from outline.el with docstring fixed.
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259 (defun hif-outline-flag-region (from to flag)
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260 "Hides or shows lines from FROM to TO, according to FLAG.
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261 If FLAG is \\n (newline character) then text is shown, while if FLAG is \\^M
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262 \(control-M) the text is hidden."
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263 (let ((modp (buffer-modified-p)))
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264 (unwind-protect (progn
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265 (subst-char-in-region from to
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266 (if (= flag ?\n) ?\^M ?\n)
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267 flag t) )
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268 (set-buffer-modified-p modp))
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269 ))
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270
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271 (defun hif-show-all ()
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272 "Show all of the text in the current buffer."
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273 (interactive)
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274 (hif-outline-flag-region (point-min) (point-max) ?\n))
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275
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276 ;; By putting this on after-revert-hook, we arrange that it only
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277 ;; does anything when revert-buffer avoids turning off the mode.
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278 ;; (That can happen in VC.)
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279 (defun hif-before-revert-function ()
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280 (and hide-ifdef-mode hide-ifdef-hiding
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281 (hide-ifdefs t)))
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282 (add-hook 'after-revert-hook 'hif-before-revert-function)
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283
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284 (defun hide-ifdef-region (start end)
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285 "START is the start of a #if or #else form. END is the ending part.
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286 Everything including these lines is made invisible."
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287 (hif-outline-flag-region start end ?\^M)
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288 )
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289
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290 (defun hif-show-ifdef-region (start end)
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291 "Everything between START and END is made visible."
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292 (hif-outline-flag-region start end ?\n)
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293 )
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294
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295
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296
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297 ;===%%SF%% evaluation (Start) ===
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298
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299 ;; It is not useful to set this to anything but `eval'.
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300 ;; In fact, the variable might as well be eliminated.
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301 (defvar hide-ifdef-evaluator 'eval
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302 "The function to use to evaluate a form.
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303 The evaluator is given a canonical form and returns t if text under
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304 that form should be displayed.")
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305
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306 (defvar hif-undefined-symbol nil
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307 "...is by default considered to be false.")
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308
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309 (defvar hide-ifdef-env nil
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310 "An alist of defined symbols and their values.")
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311
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312
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313 (defun hif-set-var (var value)
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314 "Prepend (var value) pair to hide-ifdef-env."
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315 (setq hide-ifdef-env (cons (cons var value) hide-ifdef-env)))
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316
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317
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318 (defun hif-lookup (var)
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319 ; (message "hif-lookup %s" var)
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320 (let ((val (assoc var hide-ifdef-env)))
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321 (if val
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322 (cdr val)
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323 hif-undefined-symbol)))
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324
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325 (defun hif-defined (var)
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326 (hif-lookup var)
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327 ; when #if expressions are fully supported, defined result should be 1
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328 ; (if (assoc var hide-ifdef-env)
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329 ; 1
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330 ; nil)
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331 )
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332
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333
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334 ;===%%SF%% evaluation (End) ===
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335
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336
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337
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338 ;===%%SF%% parsing (Start) ===
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339 ;;; The code that understands what ifs and ifdef in files look like.
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340
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341 (defconst hif-cpp-prefix "\\(^\\|\r\\)[ \t]*#[ \t]*")
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342 (defconst hif-ifndef-regexp (concat hif-cpp-prefix "ifndef"))
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343 (defconst hif-ifx-regexp (concat hif-cpp-prefix "if\\(n?def\\)?[ \t]+"))
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344 (defconst hif-else-regexp (concat hif-cpp-prefix "else"))
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345 (defconst hif-endif-regexp (concat hif-cpp-prefix "endif"))
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346 (defconst hif-ifx-else-endif-regexp
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347 (concat hif-ifx-regexp "\\|" hif-else-regexp "\\|" hif-endif-regexp))
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348
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349
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350 (defun hif-infix-to-prefix (token-list)
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351 "Convert list of tokens in infix into prefix list"
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352 ; (message "hif-infix-to-prefix: %s" token-list)
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353 (if (= 1 (length token-list))
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354 (` (hif-lookup (quote (, (car token-list)))))
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355 (hif-parse-if-exp token-list))
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356 )
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357
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358 ; pattern to match initial identifier, !, &&, ||, (, or ).
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359 ; Added ==, + and -: garyo@avs.com 8/9/94
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360 (defconst hif-token-regexp "^\\(!\\|&&\\|||\\|[!=]=\\|[()+-]\\|\\w+\\)")
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361 (defconst hif-end-of-comment "\\*/")
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362
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363
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364 (defun hif-tokenize (expr-string)
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365 "Separate string into a list of tokens"
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366 (let ((token-list nil)
|
|
|
367 (expr-start 0)
|
|
2
|
368 (expr-length (length expr-string))
|
|
|
369 (current-syntax-table (syntax-table)))
|
|
|
370 (unwind-protect
|
|
|
371 (progn
|
|
|
372 (set-syntax-table hide-ifdef-syntax-table)
|
|
|
373 (while (< expr-start expr-length)
|
|
|
374 ; (message "expr-start = %d" expr-start) (sit-for 1)
|
|
|
375 (cond
|
|
|
376 ((string-match "^[ \t]+" expr-string expr-start)
|
|
|
377 ;; skip whitespace
|
|
|
378 (setq expr-start (match-end 0))
|
|
|
379 ;; stick newline in string so ^ matches on the next string-match
|
|
|
380 (aset expr-string (1- expr-start) ?\n))
|
|
0
|
381
|
|
2
|
382 ((string-match "^/\\*" expr-string expr-start)
|
|
|
383 (setq expr-start (match-end 0))
|
|
|
384 (aset expr-string (1- expr-start) ?\n)
|
|
|
385 (or
|
|
|
386 (string-match hif-end-of-comment
|
|
|
387 expr-string expr-start) ; eat comment
|
|
|
388 (string-match "$" expr-string expr-start)) ; multi-line comment
|
|
|
389 (setq expr-start (match-end 0))
|
|
|
390 (aset expr-string (1- expr-start) ?\n))
|
|
0
|
391
|
|
2
|
392 ((string-match "^//" expr-string expr-start)
|
|
|
393 (string-match "$" expr-string expr-start)
|
|
|
394 (setq expr-start (match-end 0)))
|
|
0
|
395
|
|
2
|
396 ((string-match hif-token-regexp expr-string expr-start)
|
|
|
397 (let ((token (substring expr-string expr-start (match-end 0))))
|
|
|
398 (setq expr-start (match-end 0))
|
|
|
399 (aset expr-string (1- expr-start) ?\n)
|
|
|
400 ; (message "token: %s" token) (sit-for 1)
|
|
|
401 (setq token-list
|
|
|
402 (cons
|
|
|
403 (cond
|
|
|
404 ((string-equal token "||") 'or)
|
|
|
405 ((string-equal token "&&") 'and)
|
|
|
406 ((string-equal token "==") 'equal)
|
|
|
407 ((string-equal token "!=") 'hif-notequal)
|
|
|
408 ((string-equal token "!") 'not)
|
|
|
409 ((string-equal token "defined") 'hif-defined)
|
|
|
410 ((string-equal token "(") 'lparen)
|
|
|
411 ((string-equal token ")") 'rparen)
|
|
|
412 ((string-equal token "+") 'hif-plus)
|
|
|
413 ((string-equal token "-") 'hif-minus)
|
|
|
414 (t (intern token)))
|
|
|
415 token-list))))
|
|
|
416 (t (error "Bad #if expression: %s" expr-string)))))
|
|
|
417 (set-syntax-table current-syntax-table))
|
|
|
418 (nreverse token-list)))
|
|
0
|
419
|
|
|
420 ;;;-----------------------------------------------------------------
|
|
|
421 ;;; Translate C preprocessor #if expressions using recursive descent.
|
|
|
422 ;;; This parser is limited to the operators &&, ||, !, and "defined".
|
|
2
|
423 ;;; Added ==, !=, +, and -. Gary Oberbrunner, garyo@avs.com, 8/9/94
|
|
0
|
424
|
|
|
425 (defun hif-parse-if-exp (token-list)
|
|
|
426 "Parse the TOKEN-LIST. Return translated list in prefix form."
|
|
|
427 (hif-nexttoken)
|
|
|
428 (prog1
|
|
|
429 (hif-expr)
|
|
|
430 (if token ; is there still a token?
|
|
2
|
431 (error "Error: unexpected token: %s" token))))
|
|
0
|
432
|
|
|
433 (defun hif-nexttoken ()
|
|
|
434 "Pop the next token from token-list into the let variable \"token\"."
|
|
|
435 (setq token (car token-list))
|
|
|
436 (setq token-list (cdr token-list))
|
|
2
|
437 token)
|
|
0
|
438
|
|
|
439 (defun hif-expr ()
|
|
2
|
440 "Parse an expression as found in #if.
|
|
0
|
441 expr : term | expr '||' term."
|
|
|
442 (let ((result (hif-term)))
|
|
|
443 (while (eq token 'or)
|
|
|
444 (hif-nexttoken)
|
|
|
445 (setq result (list 'or result (hif-term))))
|
|
2
|
446 result))
|
|
0
|
447
|
|
|
448 (defun hif-term ()
|
|
2
|
449 "Parse a term : eq-expr | term '&&' eq-expr."
|
|
|
450 (let ((result (hif-eq-expr)))
|
|
0
|
451 (while (eq token 'and)
|
|
|
452 (hif-nexttoken)
|
|
2
|
453 (setq result (list 'and result (hif-eq-expr))))
|
|
|
454 result))
|
|
|
455
|
|
|
456 (defun hif-eq-expr ()
|
|
|
457 "Parse an eq-expr : math | eq-expr '=='|'!=' math."
|
|
|
458 (let ((result (hif-math))
|
|
|
459 (eq-token nil))
|
|
|
460 (while (or (eq token 'equal) (eq token 'hif-notequal))
|
|
|
461 (setq eq-token token)
|
|
|
462 (hif-nexttoken)
|
|
|
463 (setq result (list eq-token result (hif-math))))
|
|
|
464 result))
|
|
|
465
|
|
|
466 (defun hif-math ()
|
|
|
467 "Parse an expression with + or - and simpler things.
|
|
|
468 math : factor | math '+|-' factor."
|
|
|
469 (let ((result (hif-factor))
|
|
|
470 (math-op nil))
|
|
|
471 (while (or (eq token 'hif-plus) (eq token 'hif-minus))
|
|
|
472 (setq math-op token)
|
|
|
473 (hif-nexttoken)
|
|
|
474 (setq result (list math-op result (hif-factor))))
|
|
|
475 result))
|
|
0
|
476
|
|
|
477 (defun hif-factor ()
|
|
2
|
478 "Parse a factor: '!' factor | '(' expr ')' | 'defined(' id ')' | id."
|
|
0
|
479 (cond
|
|
|
480 ((eq token 'not)
|
|
|
481 (hif-nexttoken)
|
|
|
482 (list 'not (hif-factor)))
|
|
|
483
|
|
|
484 ((eq token 'lparen)
|
|
|
485 (hif-nexttoken)
|
|
|
486 (let ((result (hif-expr)))
|
|
|
487 (if (not (eq token 'rparen))
|
|
|
488 (error "Bad token in parenthesized expression: %s" token)
|
|
|
489 (hif-nexttoken)
|
|
|
490 result)))
|
|
|
491
|
|
|
492 ((eq token 'hif-defined)
|
|
|
493 (hif-nexttoken)
|
|
|
494 (if (not (eq token 'lparen))
|
|
|
495 (error "Error: expected \"(\" after \"defined\""))
|
|
|
496 (hif-nexttoken)
|
|
|
497 (let ((ident token))
|
|
|
498 (if (memq token '(or and not hif-defined lparen rparen))
|
|
|
499 (error "Error: unexpected token: %s" token))
|
|
|
500 (hif-nexttoken)
|
|
|
501 (if (not (eq token 'rparen))
|
|
|
502 (error "Error: expected \")\" after identifier"))
|
|
|
503 (hif-nexttoken)
|
|
|
504 (` (hif-defined (quote (, ident))))
|
|
|
505 ))
|
|
|
506
|
|
|
507 (t ; identifier
|
|
|
508 (let ((ident token))
|
|
|
509 (if (memq ident '(or and))
|
|
|
510 (error "Error: missing identifier"))
|
|
|
511 (hif-nexttoken)
|
|
|
512 (` (hif-lookup (quote (, ident))))
|
|
|
513 ))
|
|
2
|
514 ))
|
|
0
|
515
|
|
2
|
516 (defun hif-mathify (val)
|
|
|
517 "Treat VAL as a number: if it's t or nil, use 1 or 0."
|
|
|
518 (cond ((eq val t)
|
|
|
519 1)
|
|
|
520 ((null val)
|
|
|
521 0)
|
|
|
522 (t val)))
|
|
|
523
|
|
|
524 (defun hif-plus (a b)
|
|
|
525 "Like ordinary plus but treat t and nil as 1 and 0."
|
|
|
526 (+ (hif-mathify a) (hif-mathify b)))
|
|
|
527 (defun hif-minus (a b)
|
|
|
528 "Like ordinary minus but treat t and nil as 1 and 0."
|
|
|
529 (- (hif-mathify a) (hif-mathify b)))
|
|
|
530 (defun hif-notequal (a b)
|
|
|
531 "Like (not (equal A B)) but as one symbol."
|
|
|
532 (not (equal a b)))
|
|
0
|
533
|
|
|
534 ;;;----------- end of parser -----------------------
|
|
|
535
|
|
|
536
|
|
|
537 (defun hif-canonicalize ()
|
|
2
|
538 "When at beginning of #ifX, returns a Lisp expression for its condition."
|
|
0
|
539 (save-excursion
|
|
|
540 (let ((negate (looking-at hif-ifndef-regexp)))
|
|
|
541 (re-search-forward hif-ifx-regexp)
|
|
|
542 (let* ((expr-string
|
|
|
543 (buffer-substring (point)
|
|
|
544 (progn (skip-chars-forward "^\n\r") (point))))
|
|
|
545 (expr (hif-infix-to-prefix (hif-tokenize expr-string))))
|
|
|
546 ; (message "hif-canonicalized: %s" expr)
|
|
|
547 (if negate
|
|
|
548 (list 'not expr)
|
|
|
549 expr)))))
|
|
|
550
|
|
|
551
|
|
|
552 (defun hif-find-any-ifX ()
|
|
2
|
553 "Move to next #if..., or #ifndef, at point or after."
|
|
0
|
554 ; (message "find ifX at %d" (point))
|
|
|
555 (prog1
|
|
|
556 (re-search-forward hif-ifx-regexp (point-max) t)
|
|
|
557 (beginning-of-line)))
|
|
|
558
|
|
|
559
|
|
|
560 (defun hif-find-next-relevant ()
|
|
2
|
561 "Move to next #if..., #else, or #endif, after the current line."
|
|
0
|
562 ; (message "hif-find-next-relevant at %d" (point))
|
|
|
563 (end-of-line)
|
|
|
564 ; avoid infinite recursion by only going to beginning of line if match found
|
|
|
565 (if (re-search-forward hif-ifx-else-endif-regexp (point-max) t)
|
|
2
|
566 (beginning-of-line)))
|
|
0
|
567
|
|
|
568 (defun hif-find-previous-relevant ()
|
|
2
|
569 "Move to previous #if..., #else, or #endif, before the current line."
|
|
0
|
570 ; (message "hif-find-previous-relevant at %d" (point))
|
|
|
571 (beginning-of-line)
|
|
|
572 ; avoid infinite recursion by only going to beginning of line if match found
|
|
|
573 (if (re-search-backward hif-ifx-else-endif-regexp (point-min) t)
|
|
2
|
574 (beginning-of-line)))
|
|
0
|
575
|
|
|
576
|
|
|
577 (defun hif-looking-at-ifX () ;; Should eventually see #if
|
|
|
578 (looking-at hif-ifx-regexp))
|
|
|
579 (defun hif-looking-at-endif ()
|
|
|
580 (looking-at hif-endif-regexp))
|
|
|
581 (defun hif-looking-at-else ()
|
|
|
582 (looking-at hif-else-regexp))
|
|
|
583
|
|
|
584
|
|
|
585
|
|
|
586 (defun hif-ifdef-to-endif ()
|
|
|
587 "If positioned at #ifX or #else form, skip to corresponding #endif."
|
|
|
588 ; (message "hif-ifdef-to-endif at %d" (point)) (sit-for 1)
|
|
|
589 (hif-find-next-relevant)
|
|
|
590 (cond ((hif-looking-at-ifX)
|
|
|
591 (hif-ifdef-to-endif) ; find endif of nested if
|
|
|
592 (hif-ifdef-to-endif)) ; find outer endif or else
|
|
|
593 ((hif-looking-at-else)
|
|
|
594 (hif-ifdef-to-endif)) ; find endif following else
|
|
|
595 ((hif-looking-at-endif)
|
|
|
596 'done)
|
|
|
597 (t
|
|
2
|
598 (error "Mismatched #ifdef #endif pair"))))
|
|
0
|
599
|
|
|
600
|
|
|
601 (defun hif-endif-to-ifdef ()
|
|
|
602 "If positioned at #endif form, skip backward to corresponding #ifX."
|
|
|
603 ; (message "hif-endif-to-ifdef at %d" (point))
|
|
|
604 (let ((start (point)))
|
|
|
605 (hif-find-previous-relevant)
|
|
|
606 (if (= start (point))
|
|
2
|
607 (error "Mismatched #ifdef #endif pair")))
|
|
0
|
608 (cond ((hif-looking-at-endif)
|
|
|
609 (hif-endif-to-ifdef) ; find beginning of nested if
|
|
|
610 (hif-endif-to-ifdef)) ; find beginning of outer if or else
|
|
|
611 ((hif-looking-at-else)
|
|
|
612 (hif-endif-to-ifdef))
|
|
|
613 ((hif-looking-at-ifX)
|
|
|
614 'done)
|
|
2
|
615 (t))) ; never gets here
|
|
0
|
616
|
|
|
617
|
|
|
618 (defun forward-ifdef (&optional arg)
|
|
|
619 "Move point to beginning of line of the next ifdef-endif.
|
|
2
|
620 With argument, do this that many times."
|
|
0
|
621 (interactive "p")
|
|
|
622 (or arg (setq arg 1))
|
|
|
623 (if (< arg 0)
|
|
|
624 (backward-ifdef (- arg)))
|
|
|
625 (while (< 0 arg)
|
|
|
626 (setq arg (- arg))
|
|
|
627 (let ((start (point)))
|
|
|
628 (if (not (hif-looking-at-ifX))
|
|
|
629 (hif-find-next-relevant))
|
|
|
630 (if (hif-looking-at-ifX)
|
|
|
631 (hif-ifdef-to-endif)
|
|
|
632 (goto-char start)
|
|
|
633 (error "No following #ifdef")
|
|
|
634 ))))
|
|
|
635
|
|
|
636
|
|
|
637 (defun backward-ifdef (&optional arg)
|
|
|
638 "Move point to beginning of the previous ifdef-endif.
|
|
2
|
639 With argument, do this that many times."
|
|
0
|
640 (interactive "p")
|
|
|
641 (or arg (setq arg 1))
|
|
|
642 (if (< arg 0)
|
|
|
643 (forward-ifdef (- arg)))
|
|
|
644 (while (< 0 arg)
|
|
|
645 (setq arg (1- arg))
|
|
|
646 (beginning-of-line)
|
|
|
647 (let ((start (point)))
|
|
|
648 (if (not (hif-looking-at-endif))
|
|
|
649 (hif-find-previous-relevant))
|
|
|
650 (if (hif-looking-at-endif)
|
|
|
651 (hif-endif-to-ifdef)
|
|
|
652 (goto-char start)
|
|
2
|
653 (error "No previous #ifdef")))))
|
|
0
|
654
|
|
|
655
|
|
|
656 (defun down-ifdef ()
|
|
|
657 "Move point to beginning of nested ifdef or else-part."
|
|
|
658 (interactive)
|
|
|
659 (let ((start (point)))
|
|
|
660 (hif-find-next-relevant)
|
|
|
661 (if (or (hif-looking-at-ifX) (hif-looking-at-else))
|
|
|
662 ()
|
|
|
663 (goto-char start)
|
|
2
|
664 (error "No following #ifdef"))))
|
|
0
|
665
|
|
|
666
|
|
|
667 (defun up-ifdef ()
|
|
|
668 "Move point to beginning of enclosing ifdef or else-part."
|
|
|
669 (interactive)
|
|
|
670 (beginning-of-line)
|
|
|
671 (let ((start (point)))
|
|
|
672 (if (not (hif-looking-at-endif))
|
|
|
673 (hif-find-previous-relevant))
|
|
|
674 (if (hif-looking-at-endif)
|
|
|
675 (hif-endif-to-ifdef))
|
|
|
676 (if (= start (point))
|
|
2
|
677 (error "No previous #ifdef"))))
|
|
0
|
678
|
|
|
679 (defun next-ifdef (&optional arg)
|
|
|
680 "Move to the beginning of the next #ifX, #else, or #endif.
|
|
2
|
681 With argument, do this that many times."
|
|
0
|
682 (interactive "p")
|
|
|
683 (or arg (setq arg 1))
|
|
|
684 (if (< arg 0)
|
|
|
685 (previous-ifdef (- arg)))
|
|
|
686 (while (< 0 arg)
|
|
|
687 (setq arg (1- arg))
|
|
|
688 (hif-find-next-relevant)
|
|
|
689 (if (eolp)
|
|
|
690 (progn
|
|
|
691 (beginning-of-line)
|
|
2
|
692 (error "No following #ifdefs, #elses, or #endifs")))))
|
|
0
|
693
|
|
|
694 (defun previous-ifdef (&optional arg)
|
|
|
695 "Move to the beginning of the previous #ifX, #else, or #endif.
|
|
2
|
696 With argument, do this that many times."
|
|
0
|
697 (interactive "p")
|
|
|
698 (or arg (setq arg 1))
|
|
|
699 (if (< arg 0)
|
|
|
700 (next-ifdef (- arg)))
|
|
|
701 (while (< 0 arg)
|
|
|
702 (setq arg (1- arg))
|
|
|
703 (let ((start (point)))
|
|
|
704 (hif-find-previous-relevant)
|
|
|
705 (if (= start (point))
|
|
2
|
706 (error "No previous #ifdefs, #elses, or #endifs")))))
|
|
0
|
707
|
|
|
708
|
|
|
709 ;===%%SF%% parsing (End) ===
|
|
|
710
|
|
|
711
|
|
|
712 ;===%%SF%% hide-ifdef-hiding (Start) ===
|
|
|
713
|
|
|
714
|
|
|
715 ;;; A range is a structure with four components:
|
|
|
716 ;;; ELSE-P True if there was an else clause for the ifdef.
|
|
|
717 ;;; START The start of the range. (beginning of line)
|
|
|
718 ;;; ELSE The else marker (beginning of line)
|
|
|
719 ;;; Only valid if ELSE-P is true.
|
|
|
720 ;;; END The end of the range. (beginning of line)
|
|
|
721
|
|
|
722 (defun hif-make-range (else-p start end &optional else)
|
|
|
723 (list else-p start else end))
|
|
|
724
|
|
|
725 (defun hif-range-else-p (range) (elt range 0))
|
|
|
726 (defun hif-range-start (range) (elt range 1))
|
|
|
727 (defun hif-range-else (range) (elt range 2))
|
|
|
728 (defun hif-range-end (range) (elt range 3))
|
|
|
729
|
|
|
730
|
|
|
731
|
|
|
732 ;;; Find-Range
|
|
|
733 ;;; The workhorse, it delimits the #if region. Reasonably simple:
|
|
|
734 ;;; Skip until an #else or #endif is found, remembering positions. If
|
|
|
735 ;;; an #else was found, skip some more, looking for the true #endif.
|
|
|
736
|
|
|
737 (defun hif-find-range ()
|
|
|
738 "Returns a Range structure describing the current #if region.
|
|
|
739 Point is left unchanged."
|
|
|
740 ; (message "hif-find-range at %d" (point))
|
|
|
741 (save-excursion
|
|
|
742 (beginning-of-line)
|
|
|
743 (let ((start (point))
|
|
|
744 (else-p nil)
|
|
|
745 (else nil)
|
|
|
746 (end nil))
|
|
|
747 ;; Part one. Look for either #endif or #else.
|
|
|
748 ;; This loop-and-a-half dedicated to E. Dijkstra.
|
|
|
749 (hif-find-next-relevant)
|
|
|
750 (while (hif-looking-at-ifX) ; Skip nested ifdef
|
|
|
751 (hif-ifdef-to-endif)
|
|
|
752 (hif-find-next-relevant))
|
|
|
753 ;; Found either a #else or an #endif.
|
|
|
754 (cond ((hif-looking-at-else)
|
|
|
755 (setq else-p t)
|
|
|
756 (setq else (point)))
|
|
|
757 (t
|
|
|
758 (setq end (point)) ; (save-excursion (end-of-line) (point))
|
|
|
759 ))
|
|
|
760 ;; If found #else, look for #endif.
|
|
|
761 (if else-p
|
|
|
762 (progn
|
|
|
763 (hif-find-next-relevant)
|
|
|
764 (while (hif-looking-at-ifX) ; Skip nested ifdef
|
|
|
765 (hif-ifdef-to-endif)
|
|
|
766 (hif-find-next-relevant))
|
|
|
767 (if (hif-looking-at-else)
|
|
|
768 (error "Found two elses in a row? Broken!"))
|
|
|
769 (setq end (point)) ; (save-excursion (end-of-line) (point))
|
|
|
770 ))
|
|
|
771 (hif-make-range else-p start end else))))
|
|
|
772
|
|
|
773
|
|
|
774 ;;; A bit slimy.
|
|
|
775 ;;; NOTE: If there's an #ifdef at the beginning of the file, we can't
|
|
|
776 ;;; hide it. There's no previous newline to replace. If we added
|
|
|
777 ;;; one, we'd throw off all the counts. Feh.
|
|
|
778
|
|
|
779 (defun hif-hide-line (point)
|
|
2
|
780 "Hide the line containing point. Does nothing if `hide-ifdef-lines' is nil."
|
|
0
|
781 (if hide-ifdef-lines
|
|
|
782 (save-excursion
|
|
|
783 (goto-char point)
|
|
|
784 (let ((modp (buffer-modified-p)))
|
|
|
785 (unwind-protect
|
|
|
786 (progn
|
|
|
787 (beginning-of-line)
|
|
|
788 (if (not (= (point) 1))
|
|
|
789 (hide-ifdef-region (1- (point)) (point))))
|
|
|
790 (set-buffer-modified-p modp))
|
|
|
791 ))
|
|
|
792 ))
|
|
|
793
|
|
|
794
|
|
|
795 ;;; Hif-Possibly-Hide
|
|
|
796 ;;; There are four cases. The #ifX expression is "taken" if it
|
|
|
797 ;;; the hide-ifdef-evaluator returns T. Presumably, this means the code
|
|
|
798 ;;; inside the #ifdef would be included when the program was
|
|
|
799 ;;; compiled.
|
|
|
800 ;;;
|
|
|
801 ;;; Case 1: #ifX taken, and there's an #else.
|
|
|
802 ;;; The #else part must be hidden. The #if (then) part must be
|
|
|
803 ;;; processed for nested #ifX's.
|
|
|
804 ;;; Case 2: #ifX taken, and there's no #else.
|
|
|
805 ;;; The #if part must be processed for nested #ifX's.
|
|
|
806 ;;; Case 3: #ifX not taken, and there's an #else.
|
|
|
807 ;;; The #if part must be hidden. The #else part must be processed
|
|
|
808 ;;; for nested #ifs.
|
|
|
809 ;;; Case 4: #ifX not taken, and there's no #else.
|
|
|
810 ;;; The #ifX part must be hidden.
|
|
|
811 ;;;
|
|
|
812 ;;; Further processing is done by narrowing to the relevant region
|
|
|
813 ;;; and just recursively calling hide-ifdef-guts.
|
|
|
814 ;;;
|
|
|
815 ;;; When hif-possibly-hide returns, point is at the end of the
|
|
|
816 ;;; possibly-hidden range.
|
|
|
817
|
|
|
818 (defun hif-recurse-on (start end)
|
|
2
|
819 "Call `hide-ifdef-guts' after narrowing to end of START line and END line."
|
|
0
|
820 (save-excursion
|
|
|
821 (save-restriction
|
|
|
822 (goto-char start)
|
|
|
823 (end-of-line)
|
|
|
824 (narrow-to-region (point) end)
|
|
|
825 (hide-ifdef-guts))))
|
|
|
826
|
|
|
827 (defun hif-possibly-hide ()
|
|
2
|
828 "Called at #ifX expression, this hides those parts that should be hidden.
|
|
|
829 It uses the judgement of `hide-ifdef-evaluator'."
|
|
0
|
830 ; (message "hif-possibly-hide") (sit-for 1)
|
|
|
831 (let ((test (hif-canonicalize))
|
|
|
832 (range (hif-find-range)))
|
|
|
833 ; (message "test = %s" test) (sit-for 1)
|
|
|
834
|
|
|
835 (hif-hide-line (hif-range-end range))
|
|
|
836 (if (funcall hide-ifdef-evaluator test)
|
|
|
837 (cond ((hif-range-else-p range) ; case 1
|
|
|
838 (hif-hide-line (hif-range-else range))
|
|
|
839 (hide-ifdef-region (hif-range-else range)
|
|
|
840 (1- (hif-range-end range)))
|
|
|
841 (hif-recurse-on (hif-range-start range)
|
|
|
842 (hif-range-else range)))
|
|
|
843 (t ; case 2
|
|
|
844 (hif-recurse-on (hif-range-start range)
|
|
|
845 (hif-range-end range))))
|
|
|
846 (cond ((hif-range-else-p range) ; case 3
|
|
|
847 (hif-hide-line (hif-range-else range))
|
|
|
848 (hide-ifdef-region (hif-range-start range)
|
|
|
849 (1- (hif-range-else range)))
|
|
|
850 (hif-recurse-on (hif-range-else range)
|
|
|
851 (hif-range-end range)))
|
|
|
852 (t ; case 4
|
|
|
853 (hide-ifdef-region (point)
|
|
|
854 (1- (hif-range-end range))))
|
|
|
855 ))
|
|
|
856 (hif-hide-line (hif-range-start range)) ; Always hide start.
|
|
|
857 (goto-char (hif-range-end range))
|
|
|
858 (end-of-line)
|
|
|
859 ))
|
|
|
860
|
|
|
861
|
|
|
862
|
|
|
863 (defun hide-ifdef-guts ()
|
|
2
|
864 "Does most of the work of `hide-ifdefs'.
|
|
|
865 It does not do the work that's pointless to redo on a recursive entry."
|
|
0
|
866 ; (message "hide-ifdef-guts")
|
|
|
867 (save-excursion
|
|
|
868 (goto-char (point-min))
|
|
|
869 (while (hif-find-any-ifX)
|
|
|
870 (hif-possibly-hide))))
|
|
|
871
|
|
|
872 ;===%%SF%% hide-ifdef-hiding (End) ===
|
|
|
873
|
|
|
874
|
|
|
875 ;===%%SF%% exports (Start) ===
|
|
|
876
|
|
2
|
877 ;;;###autoload
|
|
0
|
878 (defvar hide-ifdef-initially nil
|
|
2
|
879 "*Non-nil means call `hide-ifdefs' when Hide-Ifdef mode is first activated.")
|
|
0
|
880
|
|
2
|
881 ;;;###autoload
|
|
0
|
882 (defvar hide-ifdef-read-only nil
|
|
|
883 "*Set to non-nil if you want buffer to be read-only while hiding text.")
|
|
|
884
|
|
|
885 (defvar hif-outside-read-only nil
|
|
2
|
886 "Internal variable. Saves the value of `buffer-read-only' while hiding.")
|
|
0
|
887
|
|
2
|
888 ;;;###autoload
|
|
0
|
889 (defvar hide-ifdef-lines nil
|
|
2
|
890 "*Non-nil means hide the #ifX, #else, and #endif lines.")
|
|
0
|
891
|
|
|
892 (defun hide-ifdef-toggle-read-only ()
|
|
|
893 "Toggle hide-ifdef-read-only."
|
|
|
894 (interactive)
|
|
|
895 (setq hide-ifdef-read-only (not hide-ifdef-read-only))
|
|
|
896 (message "Hide-Read-Only %s"
|
|
|
897 (if hide-ifdef-read-only "ON" "OFF"))
|
|
|
898 (if hide-ifdef-hiding
|
|
|
899 (setq buffer-read-only (or hide-ifdef-read-only hif-outside-read-only)))
|
|
2
|
900 ;; XEmacs change
|
|
|
901 (redraw-modeline))
|
|
0
|
902
|
|
|
903 (defun hide-ifdef-toggle-outside-read-only ()
|
|
2
|
904 "Replacement for `toggle-read-only' within Hide-Ifdef mode."
|
|
0
|
905 (interactive)
|
|
|
906 (setq hif-outside-read-only (not hif-outside-read-only))
|
|
|
907 (message "Read only %s"
|
|
|
908 (if hif-outside-read-only "ON" "OFF"))
|
|
|
909 (setq buffer-read-only
|
|
|
910 (or (and hide-ifdef-hiding hide-ifdef-read-only)
|
|
|
911 hif-outside-read-only)
|
|
|
912 )
|
|
2
|
913 ;; XEmacs change
|
|
|
914 (redraw-modeline))
|
|
0
|
915
|
|
|
916
|
|
|
917 (defun hide-ifdef-define (var)
|
|
|
918 "Define a VAR so that #ifdef VAR would be included."
|
|
|
919 (interactive "SDefine what? ")
|
|
2
|
920 (hif-set-var var 1)
|
|
0
|
921 (if hide-ifdef-hiding (hide-ifdefs)))
|
|
|
922
|
|
|
923 (defun hide-ifdef-undef (var)
|
|
|
924 "Undefine a VAR so that #ifdef VAR would not be included."
|
|
|
925 (interactive "SUndefine what? ")
|
|
|
926 (hif-set-var var nil)
|
|
|
927 (if hide-ifdef-hiding (hide-ifdefs)))
|
|
|
928
|
|
|
929
|
|
2
|
930 (defun hide-ifdefs (&optional nomsg)
|
|
|
931 "Hide the contents of some #ifdefs.
|
|
|
932 Assume that defined symbols have been added to `hide-ifdef-env'.
|
|
|
933 The text hidden is the text that would not be included by the C
|
|
|
934 preprocessor if it were given the file with those symbols defined.
|
|
0
|
935
|
|
2
|
936 Turn off hiding by calling `show-ifdefs'."
|
|
0
|
937
|
|
|
938 (interactive)
|
|
|
939 (message "Hiding...")
|
|
2
|
940 (setq hif-outside-read-only buffer-read-only)
|
|
0
|
941 (if (not hide-ifdef-mode)
|
|
|
942 (hide-ifdef-mode 1)) ; turn on hide-ifdef-mode
|
|
|
943 (if hide-ifdef-hiding
|
|
|
944 (show-ifdefs)) ; Otherwise, deep confusion.
|
|
2
|
945 (let ((inhibit-read-only t))
|
|
|
946 (setq selective-display t)
|
|
|
947 (setq hide-ifdef-hiding t)
|
|
|
948 (hide-ifdef-guts))
|
|
|
949 (setq buffer-read-only (or hide-ifdef-read-only hif-outside-read-only))
|
|
|
950 (or nomsg
|
|
|
951 (message "Hiding done")))
|
|
0
|
952
|
|
|
953
|
|
|
954 (defun show-ifdefs ()
|
|
2
|
955 "Cancel the effects of `hide-ifdef': show the contents of all #ifdefs."
|
|
0
|
956 (interactive)
|
|
2
|
957 (setq buffer-read-only hif-outside-read-only)
|
|
0
|
958 (setq selective-display nil) ; defaults
|
|
2
|
959 (let ((inhibit-read-only t))
|
|
|
960 (hif-show-all))
|
|
|
961 (setq hide-ifdef-hiding nil))
|
|
0
|
962
|
|
|
963
|
|
|
964 (defun hif-find-ifdef-block ()
|
|
2
|
965 "Utility for hide and show `ifdef-block'.
|
|
|
966 Set top and bottom of ifdef block."
|
|
0
|
967 (let (max-bottom)
|
|
|
968 (save-excursion
|
|
|
969 (beginning-of-line)
|
|
|
970 (if (not (or (hif-looking-at-else) (hif-looking-at-ifX)))
|
|
|
971 (up-ifdef))
|
|
|
972 (setq top (point))
|
|
|
973 (hif-ifdef-to-endif)
|
|
2
|
974 (setq max-bottom (1- (point))))
|
|
0
|
975 (save-excursion
|
|
|
976 (beginning-of-line)
|
|
|
977 (if (not (hif-looking-at-endif))
|
|
|
978 (hif-find-next-relevant))
|
|
|
979 (while (hif-looking-at-ifX)
|
|
|
980 (hif-ifdef-to-endif)
|
|
2
|
981 (hif-find-next-relevant))
|
|
|
982 (setq bottom (min max-bottom (1- (point)))))))
|
|
0
|
983
|
|
|
984
|
|
|
985 (defun hide-ifdef-block ()
|
|
|
986 "Hide the ifdef block (true or false part) enclosing or before the cursor."
|
|
|
987 (interactive)
|
|
|
988 (if (not hide-ifdef-mode)
|
|
|
989 (hide-ifdef-mode 1))
|
|
|
990 (setq selective-display t)
|
|
2
|
991 (let (top bottom (inhibit-read-only t))
|
|
0
|
992 (hif-find-ifdef-block) ; set top and bottom - dynamic scoping
|
|
|
993 (hide-ifdef-region top bottom)
|
|
|
994 (if hide-ifdef-lines
|
|
|
995 (progn
|
|
|
996 (hif-hide-line top)
|
|
|
997 (hif-hide-line (1+ bottom))))
|
|
2
|
998 (setq hide-ifdef-hiding t))
|
|
|
999 (setq buffer-read-only (or hide-ifdef-read-only hif-outside-read-only)))
|
|
0
|
1000
|
|
|
1001
|
|
|
1002 (defun show-ifdef-block ()
|
|
|
1003 "Show the ifdef block (true or false part) enclosing or before the cursor."
|
|
|
1004 (interactive)
|
|
2
|
1005 (let ((inhibit-read-only t))
|
|
0
|
1006 (if hide-ifdef-lines
|
|
|
1007 (save-excursion
|
|
|
1008 (beginning-of-line)
|
|
|
1009 (hif-show-ifdef-region (1- (point)) (progn (end-of-line) (point))))
|
|
|
1010
|
|
|
1011 (let (top bottom)
|
|
|
1012 (hif-find-ifdef-block)
|
|
2
|
1013 (hif-show-ifdef-region (1- top) bottom)))))
|
|
0
|
1014
|
|
|
1015
|
|
2
|
1016 ;;; definition alist support
|
|
0
|
1017
|
|
|
1018 (defvar hide-ifdef-define-alist nil
|
|
|
1019 "A global assoc list of pre-defined symbol lists")
|
|
|
1020
|
|
|
1021 (defun hif-compress-define-list (env)
|
|
|
1022 "Compress the define list ENV into a list of defined symbols only."
|
|
|
1023 (let ((defs (mapcar '(lambda (arg)
|
|
|
1024 (if (hif-lookup (car arg)) (car arg)))
|
|
|
1025 env))
|
|
|
1026 (new-defs nil))
|
|
|
1027 (while defs
|
|
|
1028 (if (car defs)
|
|
|
1029 (setq new-defs (cons (car defs) new-defs)))
|
|
|
1030 (setq defs (cdr defs)))
|
|
2
|
1031 new-defs))
|
|
0
|
1032
|
|
|
1033 (defun hide-ifdef-set-define-alist (name)
|
|
2
|
1034 "Set the association for NAME to `hide-ifdef-env'."
|
|
0
|
1035 (interactive "SSet define list: ")
|
|
|
1036 (setq hide-ifdef-define-alist
|
|
|
1037 (cons (cons name (hif-compress-define-list hide-ifdef-env))
|
|
2
|
1038 hide-ifdef-define-alist)))
|
|
0
|
1039
|
|
|
1040 (defun hide-ifdef-use-define-alist (name)
|
|
2
|
1041 "Set `hide-ifdef-env' to the define list specified by NAME."
|
|
0
|
1042 (interactive "SUse define list: ")
|
|
|
1043 (let ((define-list (assoc name hide-ifdef-define-alist)))
|
|
|
1044 (if define-list
|
|
|
1045 (setq hide-ifdef-env
|
|
|
1046 (mapcar '(lambda (arg) (cons arg t))
|
|
|
1047 (cdr define-list)))
|
|
|
1048 (error "No define list for %s" name))
|
|
2
|
1049 (if hide-ifdef-hiding (hide-ifdefs))))
|
|
0
|
1050
|
|
2
|
1051 (provide 'hideif)
|
|
|
1052
|
|
|
1053 ;;; hideif.el ends here
|
