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