+;;; lucid.el --- Emulate some Lucid Emacs functions.
+;; Copyright (C) 1993, 1995 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
(defun add-timeout (secs function object &optional resignal)
(run-at-time secs resignal function object))
(defun disable-timeout (timeout)
(cancel-timer timeout))
+
+(defun copy-tree (tree)
+ (if (consp tree)
+ (cons (copy-tree (car tree))
+ (copy-tree (cdr tree)))
+ (if (vectorp tree)
+ (let* ((new (copy-sequence tree))
+ (i (1- (length new))))
+ (while (>= i 0)
+ (aset new i (copy-tree (aref new i)))
+ (setq i (1- i)))
+ new)
+ tree)))
+
+(defalias 'current-time-seconds 'current-time)
+
+(defun keymap-parent (keymap)
+ (let ((tail (cdr keymap)))
+ (while (and tail (not (eq (car tail) 'keymap)))
+ (setq tail (cdr tail)))
+ tail))
+
+(defun set-keymap-parent (keymap new-parent)
+ (let ((tail keymap))
+ (while (and tail (cdr tail) (not (eq (car (cdr tail)) 'keymap)))
+ (setq tail (cdr tail)))
+ (if tail
+ (setcdr tail new-parent))))
+
+(defun remprop (symbol prop)
+ (let ((plist (symbol-plist symbol)))
+ (while (eq (car plist) prop)
+ (setplist symbol (setq plist (cdr (cdr plist)))))
+ (while plist
+ (if (eq (nth 2 plist) prop)
+ (setcdr (cdr plist) (nthcdr 4 plist)))
+ (setq plist (cdr (cdr plist))))))
+
+(defun map-keymap (function keymap &optional sort-first)
+ "Call FUNCTION for every binding in KEYMAP.
+This includes bindings inherited from a parent keymap.
+FUNCTION receives two arguments each time it is called:
+the character (more generally, the event type) that is bound,
+and the binding it has.
+
+Note that passing the event type directly to `define-key' does not work
+in Emacs 19. We do not emulate that particular feature of Lucid Emacs.
+If your code does that, modify it to make a vector containing the event
+type that you get. That will work in both versions of Emacs."
+ (if sort-first
+ (let (list)
+ (map-keymap (function (lambda (a b)
+ (setq list (cons (cons a b) list))))
+ keymap)
+ (setq list (sort list
+ (function (lambda (a b)
+ (setq a (car a) b (car b))
+ (if (integerp a)
+ (if (integerp b) (< a b)
+ t)
+ (if (integerp b) t
+ (string< a b)))))))
+ (while list
+ (funcall function (car (car list)) (cdr (car list)))
+ (setq list (cdr list))))
+ (while (consp keymap)
+ (if (consp (car keymap))
+ (funcall function (car (car keymap)) (cdr (car keymap)))
+ (if (vectorp (car keymap))
+ (let ((i (1- (length (car keymap))))
+ (vector (car keymap)))
+ (while (>= i 0)
+ (funcall function i (aref vector i))
+ (setq i (1- i))))))
+ (setq keymap (cdr keymap)))))
+
+(defun read-number (prompt &optional integers-only)
+ "Read a number from the minibuffer.
+Keep reentering the minibuffer until we get suitable input.
+If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
+ (interactive)
+ (let (success
+ (number nil)
+ (predicate (if integers-only 'integerp 'numberp)))
+ (while (not success)
+ (let ((input-string (read-string prompt)))
+ (condition-case ()
+ (setq number (read input-string))
+ (error))
+ (if (funcall predicate number)
+ (setq success t)
+ (let ((cursor-in-echo-area t))
+ (message "Please type %s"
+ (if integers-only "an integer" "a number"))
+ (sit-for 1)))))
+ number))
+
+(defun real-path-name (name &optional default)
+ (file-truename (expand-file-name name default)))
+
+;; It's not clear what to return if the mouse is not in FRAME.
+(defun read-mouse-position (frame)
+ (let ((pos (mouse-position)))
+ (if (eq (car pos) frame)
+ (cdr pos))))
+
+(defun switch-to-other-buffer (arg)
+ "Switch to the previous buffer.
+With a numeric arg N, switch to the Nth most recent buffer.
+With an arg of 0, buries the current buffer at the
+bottom of the buffer stack."
+ (interactive "p")
+ (if (eq arg 0)
+ (bury-buffer (current-buffer)))
+ (switch-to-buffer
+ (if (<= arg 1) (other-buffer (current-buffer))
+ (nth arg
+ (apply 'nconc
+ (mapcar
+ (lambda (buf)
+ (if (= ?\ (string-to-char (buffer-name buf)))
+ nil
+ (list buf)))
+ (buffer-list)))))))
+
+(defalias 'find-face 'internal-find-face)
+(defalias 'get-face 'internal-get-face)
+(defalias 'try-face-font 'internal-try-face-font)
+\f
+(defun make-extent (beg end &optional buffer)
+ (make-overlay beg end buffer))
+
+(defun set-extent-property (extent prop value)
+ (if (eq prop 'duplicable)
+ (cond ((and value (not (overlay-get extent prop)))
+ ;; If becoming duplicable, copy all overlayprops to text props.
+ (add-text-properties (overlay-start extent)
+ (overlay-end extent)
+ (overlay-properties extent)
+ (overlay-buffer extent)))
+ ;; If becoming no longer duplicable, remove these text props.
+ ((and (not value) (overlay-get extent prop))
+ (remove-text-properties (overlay-start extent)
+ (overlay-end extent)
+ (overlay-properties extent)
+ (overlay-buffer extent))))
+ ;; If extent is already duplicable, put this property
+ ;; on the text as well as on the overlay.
+ (if (overlay-get extent 'duplicable)
+ (put-text-property (overlay-start extent)
+ (overlay-end extent)
+ prop value (overlay-buffer extent))))
+ (overlay-put extent prop value))
+
+(defun set-extent-face (extent face)
+ (set-extent-property extent 'face face))
+
+(defun delete-extent (extent)
+ (set-extent-property extent 'duplicable nil)
+ (delete-overlay extent))
+\f
+;; Support the Lucid names with `screen' instead of `frame'.
+
+(defalias 'current-screen-configuration 'current-frame-configuration)
+(defalias 'delete-screen 'delete-frame)
+(defalias 'find-file-new-screen 'find-file-other-frame)
+(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
+(defalias 'find-tag-new-screen 'find-tag-other-frame)
+;;(defalias 'focus-screen 'focus-frame)
+(defalias 'iconify-screen 'iconify-frame)
+(defalias 'mail-new-screen 'mail-other-frame)
+(defalias 'make-screen-invisible 'make-frame-invisible)
+(defalias 'make-screen-visible 'make-frame-visible)
+;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
+(defalias 'modify-screen-parameters 'modify-frame-parameters)
+(defalias 'next-screen 'next-frame)
+;; (defalias 'next-multiscreen-window 'next-multiframe-window)
+;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
+;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
+(defalias 'redraw-screen 'redraw-frame)
+;; (defalias 'screen-char-height 'frame-char-height)
+;; (defalias 'screen-char-width 'frame-char-width)
+;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
+;; (defalias 'screen-focus 'frame-focus)
+(defalias 'screen-height 'frame-height)
+(defalias 'screen-list 'frame-list)
+;; (defalias 'screen-live-p 'frame-live-p)
+(defalias 'screen-parameters 'frame-parameters)
+(defalias 'screen-pixel-height 'frame-pixel-height)
+(defalias 'screen-pixel-width 'frame-pixel-width)
+(defalias 'screen-root-window 'frame-root-window)
+(defalias 'screen-selected-window 'frame-selected-window)
+(defalias 'lower-screen 'lower-frame)
+(defalias 'raise-screen 'raise-frame)
+(defalias 'screen-visible-p 'frame-visible-p)
+(defalias 'screen-width 'frame-width)
+(defalias 'screenp 'framep)
+(defalias 'select-screen 'select-frame)
+(defalias 'selected-screen 'selected-frame)
+;; (defalias 'set-screen-configuration 'set-frame-configuration)
+;; (defalias 'set-screen-height 'set-frame-height)
+(defalias 'set-screen-position 'set-frame-position)
+(defalias 'set-screen-size 'set-frame-size)
+;; (defalias 'set-screen-width 'set-frame-width)
+(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
+;; (defalias 'unfocus-screen 'unfocus-frame)
+(defalias 'visible-screen-list 'visible-frame-list)
+(defalias 'window-screen 'window-frame)
+(defalias 'x-create-screen 'x-create-frame)
+(defalias 'x-new-screen 'make-frame)
+
+(provide 'lucid)
+
+;;; end of lucid.el