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1 ;;!emacs
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2 ;;
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3 ;; LCD-ENTRY: hyperbole|Bob Weiner|hyperbole@infodock.com|Everyday Info Manager|23-Feb-97|4.022|ftp://ftp.xemacs.org/pub/infodock
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4 ;;
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5 ;; FILE: hversion.el
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6 ;; SUMMARY: Hyperbole version, system and load path information.
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7 ;; USAGE: GNU Emacs Lisp Library
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8 ;; KEYWORDS: hypermedia
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9 ;;
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10 ;; AUTHOR: Bob Weiner
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11 ;; ORG: InfoDock Associates
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12 ;;
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13 ;; ORIG-DATE: 1-Jan-94
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14 ;; LAST-MOD: 23-Feb-97 at 23:22:37 by Bob Weiner
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15 ;;
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16 ;; This file is part of Hyperbole.
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17 ;; Available for use and distribution under the same terms as GNU Emacs.
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18 ;;
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19 ;; Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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20 ;; Developed with support from Motorola Inc.
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21 ;;
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22 ;; DESCRIPTION:
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23 ;; DESCRIP-END.
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24
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25 ;;; ************************************************************************
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26 ;;; Public variables
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27 ;;; ************************************************************************
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28
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29 (defconst hyperb:version "04.022" "Hyperbole revision number.")
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30
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31 ;;; Support button highlighting and flashing under XEmacs.
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32 ;;;
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33 (defvar hyperb:xemacs-p
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34 (let ((case-fold-search t))
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35 (if (string-match "XEmacs" emacs-version)
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36 emacs-version))
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37 "Version string under XEmacs (not Lucid Emacs) or nil")
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38
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39 ;;; Support button highlighting and flashing under obsolete Lucid Emacs.
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40 ;;;
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41 (defvar hyperb:lemacs-p
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42 (let ((case-fold-search t))
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43 (if (string-match "XEmacs\\|Lucid" emacs-version)
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44 emacs-version))
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45 "Version string under XEmacs or Lucid Emacs or nil")
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46
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47 ;;; Support mouse handling under GNU Emacs V19.
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48 ;;;
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49 (defvar hyperb:emacs19-p
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50 (and (not hyperb:lemacs-p)
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51 (string-match "^19\\." emacs-version)
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52 emacs-version)
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53 "Version string under GNU Emacs 19 or nil")
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54
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55 ;;; Support button highlighting and flashing under obsolete Epoch.
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56 ;;;
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57 (defvar hyperb:epoch-p
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58 (if (and (boundp 'epoch::version)
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59 (stringp epoch::version))
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60 (if (string< epoch::version "Epoch 4") "V3" "V4"))
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61 "Simplified version string under Epoch, e.g. \"V4\", or nil")
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62
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63 ;;; Koutlines work only with specific versions of Emacs 19 and XEmacs.
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64 (defconst hyperb:kotl-p
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65 (if hyperb:lemacs-p
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66 ;; Only works for XEmacs 19.9 and above.
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67 (or (string-match "^19\\.9 \\|^19\\.[1-9][0-9]" emacs-version)
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68 ;; Version 20 and above.
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69 (string-lessp "20" emacs-version))
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70 hyperb:emacs19-p)
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71 "Non-nil iff this Emacs version supports the Hyperbole outliner.")
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72
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73 ;;; Account for what rain all year round and working for two ex-Harvard guys
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74 ;;; will do to programmers.
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75 (defvar hyperb:microcruft-os-p
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76 (memq system-type '(ms-windows windows-nt ms-dos))
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77 "T iff Hyperbole is running under a Microcruft OS.")
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78
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79 (defun sm-window-sys-term ()
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80 "Returns the first part of the term-type if running under a window system, else nil.
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81 Where a part in the term-type is delimited by a '-' or an '_'."
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82 (let* ((display-type (if (fboundp 'device-type) (device-type) window-system))
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83 (term (cond ((memq display-type '(x ns dps pm win32))
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84 ;; X11, NEXTSTEP (DPS), or OS/2 Presentation Manager (PM)
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85 (cond (hyperb:emacs19-p "emacs19")
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86 (hyperb:lemacs-p "lemacs")
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87 (hyperb:epoch-p "epoch")
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88 (t "xterm")))
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89 ((or (featurep 'eterm-fns)
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90 (equal (getenv "TERM") "NeXT")
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91 (equal (getenv "TERM") "eterm"))
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92 ;; NEXTSTEP add-on support to Emacs
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93 "next")
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94 ((or display-type
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95 (featurep 'sun-mouse) (featurep 'apollo))
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96 (getenv "TERM")))))
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97 (and term
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98 (substring term 0 (string-match "[-_]" term)))))
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99
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100 (defconst hyperb:window-system (sm-window-sys-term)
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101 "String name for window system or term type under which Emacs was run.
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102 If nil, no window system or mouse support is available.")
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103
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104 ;;; ************************************************************************
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105 ;;; Public functions to dynamically compute Hyperbole directory.
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106 ;;; ************************************************************************
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107
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108 (defvar hyperb:automount-prefixes
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109 (if (and (boundp 'automount-dir-prefix) (stringp automount-dir-prefix))
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110 automount-dir-prefix
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111 "^/tmp_mnt/"
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112 "*Regexp to match any automounter prefix in a pathname."))
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113
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114 (defun hyperb:stack-frame (function-list &optional debug-flag)
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115 "Return the nearest Emacs Lisp stack frame which called any function symbol from FUNCTION-LIST or nil if no match.
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116 If FUNCTION-LIST contains 'load, 'autoload or 'require, detect
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117 autoloads not visible within the Lisp level stack frames.
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118
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119 With optional DEBUG-FLAG non-nil, if no matching frame is found, return list
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120 of stack frames (from innermost to outermost)."
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121 (let ((count 0)
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122 (frame-list)
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123 (load-flag (or (memq 'load function-list)
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124 (memq 'autoload function-list)
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125 (memq 'require function-list)))
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126 fsymbol
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127 fbody
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128 frame)
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129 (or (catch 'hyperb:stack-frame
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130 (while (setq frame (backtrace-frame count))
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131 (if debug-flag (setq frame-list (cons frame frame-list)))
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132 (setq count (1+ count)
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133 fsymbol (nth 1 frame))
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134 (and (eq fsymbol 'command-execute)
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135 (not (memq 'command-execute function-list))
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136 ;; Use command being executed instead because it might not
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137 ;; show up in the stack anywhere else, e.g. if it is an
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138 ;; autoload under Emacs 19.
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139 (setq fsymbol (nth 2 frame)))
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140 (cond ((and load-flag (symbolp fsymbol)
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141 (fboundp fsymbol)
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142 (listp (setq fbody (symbol-function fsymbol)))
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143 (eq (car fbody) 'autoload))
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144 (setq frame (list (car frame) 'load
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145 (car (cdr fbody))
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146 nil noninteractive nil))
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147 (throw 'hyperb:stack-frame frame))
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148 ((memq fsymbol function-list)
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149 (throw 'hyperb:stack-frame frame))))
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150 nil)
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151 (if debug-flag (nreverse frame-list)))))
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152
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153 (defun hyperb:path-being-loaded ()
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154 "Return the full pathname used by the innermost `load' or 'require' call.
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155 Removes any matches for `hyperb:automount-prefixes' before returning
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156 the pathname."
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157 (let* ((frame (hyperb:stack-frame '(load require)))
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158 (function (nth 1 frame))
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159 file nosuffix)
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160 (cond ((eq function 'load)
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161 (setq file (nth 2 frame)
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162 nosuffix (nth 5 frame)))
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163 ((eq function 'require)
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164 (setq file (or (nth 3 frame) (symbol-name (nth 2 frame))))))
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165 (if (stringp file)
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166 (setq nosuffix (or nosuffix
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167 (string-match
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168 "\\.\\(elc?\\|elc?\\.gz\\|elc?\\.Z\\)$"
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169 file))
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170 file (substitute-in-file-name file)
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171 file (locate-file file load-path
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172 (if nosuffix "" ".elc:.el:.el.gz:.el.Z:")
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173 ;; accept any existing file
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174 0)
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175 file (if (and (stringp file)
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176 (string-match hyperb:automount-prefixes file))
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177 (substring file (1- (match-end 0)))
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178 file)))))
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179
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180 (if (fboundp 'locate-file)
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181 nil
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182 (defun locate-file (file dir-list &optional suffix-string unused)
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183 "Search for FILE in DIR-LIST.
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184 If optional SUFFIX-STRING is provided, allow file to be followed by one of the
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185 colon separated suffixes."
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186 (let ((suffix-list))
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187 (cond ((null suffix-string) (setq suffix-list '("")))
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188 ((stringp suffix-string)
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189 (let ((start 0)
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190 (len (length suffix-string)))
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191 (while (and (< start len)
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192 (string-match "[^:]+" suffix-string start))
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193 (setq suffix-list
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194 (cons (substring suffix-string
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195 (match-beginning 0)
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196 (match-end 0))
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197 suffix-list)
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198 start (1+ (match-end 0))))
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199 (setq suffix-list (nconc (nreverse suffix-list) '("")))))
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200 (t (error "(locate-file): Invalid third arg, '%s', use a colon separated string of file suffixes"
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201 suffix-string)))
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202 (if (and (file-name-absolute-p file) (file-readable-p file))
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203 file;; file exists without suffix addition, so return it
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204 (if (file-name-absolute-p file) (setq dir-list '(nil)))
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205 (if (equal file "") (error "(locate-file): Empty file argument"))
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206 (let (suffixes pathname)
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207 ;; Search dir-list for a matching, readable file.
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208 (catch 'found
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209 (while dir-list
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210 (setq suffixes suffix-list)
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211 (while suffixes
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212 (setq pathname (expand-file-name
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213 (concat file (car suffixes))
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214 (car dir-list)))
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215 (if (file-readable-p pathname)
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216 (throw 'found pathname))
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217 (setq suffixes (cdr suffixes)))
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218 (setq dir-list (cdr dir-list)))))))))
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219
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220 ;;; ************************************************************************
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221 ;;; Public functions used by pulldown and popup menus
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222 ;;; ************************************************************************
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223
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224 (if (not (fboundp 'id-browse-file))
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225 (fset 'id-browse-file 'find-file-read-only))
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226
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227 (if (not (fboundp 'id-info))
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228 (defun id-info (node)
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229 (if (br-in-browser) (br-to-view-window))
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230 (Info-goto-node node)))
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231
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232 (if (not (fboundp 'id-tool-quit)) (fset 'id-tool-quit 'eval))
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233
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234 (if (not (fboundp 'id-tool-invoke))
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235 (defun id-tool-invoke (sexp)
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236 (if (commandp sexp)
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237 (call-interactively sexp)
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238 (funcall sexp))))
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239
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240 (provide 'hversion)
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