lisp/obsolete/lucid.el

   1 ;;; lucid.el --- emulate some Lucid Emacs functions
   2
   3 ;; Copyright (C) 1993, 1995, 2001-2014 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: emacs-devel@gnu.org
   6 ;; Keywords: emulations
   7 ;; Obsolete-since: 23.2
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 ;; XEmacs autoloads CL so we might as well make use of it.
  29 (require 'cl)
  30
  31 (defalias 'current-time-seconds 'current-time)
  32
  33 (defun read-number (prompt &optional integers-only)
  34   "Read a number from the minibuffer.
  35 Keep reentering the minibuffer until we get suitable input.
  36 If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
  37   (interactive)
  38   (let (success
  39         (number nil)
  40         (predicate (if integers-only 'integerp 'numberp)))
  41     (while (not success)
  42       (let ((input-string (read-string prompt)))
  43         (condition-case ()
  44             (setq number (read input-string))
  45           (error))
  46         (if (funcall predicate number)
  47             (setq success t)
  48           (let ((cursor-in-echo-area t))
  49             (message "Please type %s"
  50                      (if integers-only "an integer" "a number"))
  51             (sit-for 1)))))
  52     number))
  53
  54 (defun real-path-name (name &optional default)
  55   (file-truename (expand-file-name name default)))
  56
  57 ;; It's not clear what to return if the mouse is not in FRAME.
  58 (defun read-mouse-position (frame)
  59   (let ((pos (mouse-position)))
  60     (if (eq (car pos) frame)
  61         (cdr pos))))
  62
  63 (defun switch-to-other-buffer (arg)
  64   "Switch to the previous buffer.
  65 With a numeric arg N, switch to the Nth most recent buffer.
  66 With an arg of 0, buries the current buffer at the
  67 bottom of the buffer stack."
  68   (interactive "p")
  69   (if (eq arg 0)
  70       (bury-buffer (current-buffer)))
  71   (switch-to-buffer
  72    (if (<= arg 1) (other-buffer (current-buffer))
  73      (nth arg
  74           (apply 'nconc
  75                  (mapcar
  76                   (lambda (buf)
  77                     (if (= ?\  (string-to-char (buffer-name buf)))
  78                         nil
  79                       (list buf)))
  80                   (buffer-list)))))))
  81
  82 (defun device-class (&optional device)
  83   "Return the class (color behavior) of DEVICE.
  84 This will be one of 'color, 'grayscale, or 'mono.
  85 This function exists for compatibility with XEmacs."
  86   (cond
  87    ((display-color-p device) 'color)
  88    ((display-grayscale-p device) 'grayscale)
  89    (t 'mono)))
  90
  91 (defalias 'find-face 'facep)
  92 (defalias 'get-face 'facep)
  93 ;; internal-try-face-font was removed from faces.el in rev 1.139, 1999/07/21.
  94 ;;;(defalias 'try-face-font 'internal-try-face-font)
  95
  96 (defalias 'exec-to-string 'shell-command-to-string)
  97 \f
  98
  99 ;; Buffer context
 100
 101 (defun buffer-syntactic-context (&optional buffer)
 102   "Syntactic context at point in BUFFER.
 103 Either of `string', `comment' or nil.
 104 This is an XEmacs compatibility function."
 105   (with-current-buffer (or buffer (current-buffer))
 106     (let ((state (syntax-ppss (point))))
 107       (cond
 108        ((nth 3 state) 'string)
 109        ((nth 4 state) 'comment)))))
 110
 111
 112 (defun buffer-syntactic-context-depth (&optional buffer)
 113   "Syntactic parenthesis depth at point in BUFFER.
 114 This is an XEmacs compatibility function."
 115   (with-current-buffer (or buffer (current-buffer))
 116     (nth 0 (syntax-ppss (point)))))
 117
 118
 119 ;; Extents
 120 (defun make-extent (beg end &optional buffer)
 121   (make-overlay beg end buffer))
 122
 123 (defun extent-properties (extent) (overlay-properties extent))
 124 (unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
 125
 126 (defun extent-at (pos &optional object property before)
 127   (with-current-buffer (or object (current-buffer))
 128     (let ((overlays (overlays-at pos 'sorted)))
 129       (when property
 130         (let (filtered)
 131           (while overlays
 132             (if (overlay-get (car overlays) property)
 133                 (setq filtered (cons (car overlays) filtered)))
 134             (setq overlays (cdr overlays)))
 135           (setq overlays filtered)))
 136       (if before
 137           (nth 1 (memq before overlays))
 138         (car overlays)))))
 139
 140 (defun set-extent-property (extent prop value)
 141   ;; Make sure that separate adjacent extents
 142   ;; with the same mouse-face value
 143   ;; do not run together as one extent.
 144   (and (eq prop 'mouse-face)
 145        (symbolp value)
 146        (setq value (list value)))
 147   (if (eq prop 'duplicable)
 148       (cond ((and value (not (overlay-get extent prop)))
 149              ;; If becoming duplicable, copy all overlayprops to text props.
 150              (add-text-properties (overlay-start extent)
 151                                   (overlay-end extent)
 152                                   (overlay-properties extent)
 153                                   (overlay-buffer extent)))
 154             ;; If becoming no longer duplicable, remove these text props.
 155             ((and (not value) (overlay-get extent prop))
 156              (remove-text-properties (overlay-start extent)
 157                                      (overlay-end extent)
 158                                      (overlay-properties extent)
 159                                      (overlay-buffer extent))))
 160     ;; If extent is already duplicable, put this property
 161     ;; on the text as well as on the overlay.
 162     (if (overlay-get extent 'duplicable)
 163         (put-text-property  (overlay-start extent)
 164                             (overlay-end extent)
 165                             prop value (overlay-buffer extent))))
 166   (overlay-put extent prop value))
 167
 168 (defun set-extent-face (extent face)
 169   (set-extent-property extent 'face face))
 170
 171 (defun set-extent-end-glyph (extent glyph)
 172   (set-extent-property extent 'after-string glyph))
 173
 174 (defun delete-extent (extent)
 175   (set-extent-property extent 'duplicable nil)
 176   (delete-overlay extent))
 177 \f
 178 ;; Support the Lucid names with `screen' instead of `frame'.
 179
 180 (defalias 'current-screen-configuration 'current-frame-configuration)
 181 (defalias 'delete-screen 'delete-frame)
 182 (defalias 'find-file-new-screen 'find-file-other-frame)
 183 (defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
 184 (defalias 'find-tag-new-screen 'find-tag-other-frame)
 185 ;;(defalias 'focus-screen 'focus-frame)
 186 (defalias 'iconify-screen 'iconify-frame)
 187 (defalias 'mail-new-screen 'mail-other-frame)
 188 (defalias 'make-screen-invisible 'make-frame-invisible)
 189 (defalias 'make-screen-visible 'make-frame-visible)
 190 ;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
 191 (defalias 'modify-screen-parameters 'modify-frame-parameters)
 192 (defalias 'next-screen 'next-frame)
 193 ;; (defalias 'next-multiscreen-window 'next-multiframe-window)
 194 ;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
 195 ;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
 196 (defalias 'redraw-screen 'redraw-frame)
 197 ;; (defalias 'screen-char-height 'frame-char-height)
 198 ;; (defalias 'screen-char-width 'frame-char-width)
 199 ;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
 200 ;; (defalias 'screen-focus 'frame-focus)
 201 (defalias 'screen-list 'frame-list)
 202 ;; (defalias 'screen-live-p 'frame-live-p)
 203 (defalias 'screen-parameters 'frame-parameters)
 204 (defalias 'screen-pixel-height 'frame-pixel-height)
 205 (defalias 'screen-pixel-width 'frame-pixel-width)
 206 (defalias 'screen-root-window 'frame-root-window)
 207 (defalias 'screen-selected-window 'frame-selected-window)
 208 (defalias 'lower-screen 'lower-frame)
 209 (defalias 'raise-screen 'raise-frame)
 210 (defalias 'screen-visible-p 'frame-visible-p)
 211 (defalias 'screenp 'framep)
 212 (defalias 'select-screen 'select-frame)
 213 (defalias 'selected-screen 'selected-frame)
 214 ;; (defalias 'set-screen-configuration 'set-frame-configuration)
 215 ;; (defalias 'set-screen-height 'set-frame-height)
 216 (defalias 'set-screen-position 'set-frame-position)
 217 (defalias 'set-screen-size 'set-frame-size)
 218 ;; (defalias 'set-screen-width 'set-frame-width)
 219 (defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
 220 ;; (defalias 'unfocus-screen 'unfocus-frame)
 221 (defalias 'visible-screen-list 'visible-frame-list)
 222 (defalias 'window-screen 'window-frame)
 223 (defalias 'x-create-screen 'x-create-frame)
 224 (defalias 'x-new-screen 'make-frame)
 225
 226 (provide 'lucid)
 227
 228 ;; Local Variables:
 229 ;; byte-compile-warnings: (not cl-functions)
 230 ;; End:
 231
 232 ;;; lucid.el ends here