[bpt/emacs.git] / lisp / emacs-lisp / lucid.el

;;; lucid.el --- emulate some Lucid Emacs functions

;; Copyright (C) 1993, 1995, 2001 Free Software Foundation, Inc.

;; Maintainer: FSF
;; Keywords: emulations

;; 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, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

;; XEmacs autoloads CL so we might as well make use of it.
(require 'cl)

(defalias 'current-time-seconds 'current-time)

(defun map-keymap (function keymap &optional sort-first)
  "Call FUNCTION for every binding in KEYMAP.
This does not include 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)
	(cl-map-keymap (lambda (a b) (push (cons a b) list))
		       keymap)
	(setq list (sort list
			 (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))))))
	(dolist (p list)
	  (funcall function (car p) (cdr p))))
    (cl-map-keymap function 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)

(defalias 'exec-to-string 'shell-command-to-string)
\f
(defun make-extent (beg end &optional buffer)
  (make-overlay beg end buffer))

(defun extent-properties (extent) (overlay-properties extent))
(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))

(defun extent-at (pos &optional object property before)
  (with-current-buffer (or object (current-buffer))
    (let ((overlays (overlays-at pos)))
      (when property
	(let (filtered)
	  (while overlays
	    (if (overlay-get (car overlays) property)
		(setq filtered (cons (car overlays) filtered)))
	    (setq overlays (cdr overlays)))
	  (setq overlays filtered)))
      (setq overlays
	    (sort overlays
		  (function (lambda (o1 o2)
			      (let ((p1 (or (overlay-get o1 'priority) 0))
				    (p2 (or (overlay-get o2 'priority) 0)))
				(or (> p1 p2)
				    (and (= p1 p2)
					 (> (overlay-start o1) (overlay-start o2)))))))))
      (if before
	  (nth 1 (memq before overlays))
	(car overlays)))))

(defun set-extent-property (extent prop value)
  ;; Make sure that separate adjacent extents
  ;; with the same mouse-face value
  ;; do not run together as one extent.
  (and (eq prop 'mouse-face)
       (symbolp value)
       (setq value (list 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 set-extent-end-glyph (extent glyph)
  (set-extent-property extent 'after-string glyph))

(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-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 '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)

;;; lucid.el ends here
Commit	Line	Data
60370d40	1	;;; lucid.el --- emulate some Lucid Emacs functions
b578f267	2
284b3043	3	;; Copyright (C) 1993, 1995, 2001 Free Software Foundation, Inc.
6de6752c	4
070c251e	5	;; Maintainer: FSF
284b3043	6	;; Keywords: emulations
070c251e	7
6de6752c RS	8	;; This file is part of GNU Emacs.
	9
	10	;; GNU Emacs is free software; you can redistribute it and/or modify
	11	;; it under the terms of the GNU General Public License as published by
	12	;; the Free Software Foundation; either version 2, or (at your option)
	13	;; any later version.
	14
	15	;; GNU Emacs is distributed in the hope that it will be useful,
	16	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	;; GNU General Public License for more details.
	19
	20	;; You should have received a copy of the GNU General Public License
b578f267 EN	21	;; along with GNU Emacs; see the file COPYING. If not, write to the
	22	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	23	;; Boston, MA 02111-1307, USA.
6de6752c	24
60370d40 PJ	25	;;; Commentary:
60370d40 PJ	26
b578f267	27	;;; Code:
6de6752c	28
5e2dfaa4 SM	29	;; XEmacs autoloads CL so we might as well make use of it.
5e2dfaa4 SM	30	(require 'cl)
330fba95	31
31e1d920	32	(defalias 'current-time-seconds 'current-time)
330fba95	33
7d18d35c	34	(defun map-keymap (function keymap &optional sort-first)
3e6580d0	35	"Call FUNCTION for every binding in KEYMAP.
5e2dfaa4	36	This does not include bindings inherited from a parent keymap.
3e6580d0 JB	37	FUNCTION receives two arguments each time it is called:
3e6580d0 JB	38	the character (more generally, the event type) that is bound,
aef4422e RS	39	and the binding it has.
	40
	41	Note that passing the event type directly to `define-key' does not work
	42	in Emacs 19. We do not emulate that particular feature of Lucid Emacs.
	43	If your code does that, modify it to make a vector containing the event
	44	type that you get. That will work in both versions of Emacs."
7d18d35c JB	45	(if sort-first
7d18d35c JB	46	(let (list)
5e2dfaa4 SM	47	(cl-map-keymap (lambda (a b) (push (cons a b) list))
5e2dfaa4 SM	48	keymap)
7d18d35c	49	(setq list (sort list
5e2dfaa4 SM	50	(lambda (a b)
	51	(setq a (car a) b (car b))
	52	(if (integerp a)
	53	(if (integerp b) (< a b)
	54	t)
	55	(if (integerp b) t
	56	(string< a b))))))
	57	(dolist (p list)
	58	(funcall function (car p) (cdr p))))
	59	(cl-map-keymap function keymap)))
7d18d35c	60
3b787dc3 RS	61	(defun read-number (prompt &optional integers-only)
	62	"Read a number from the minibuffer.
	63	Keep reentering the minibuffer until we get suitable input.
	64	If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
	65	(interactive)
	66	(let (success
	67	(number nil)
	68	(predicate (if integers-only 'integerp 'numberp)))
	69	(while (not success)
	70	(let ((input-string (read-string prompt)))
	71	(condition-case ()
	72	(setq number (read input-string))
	73	(error))
	74	(if (funcall predicate number)
	75	(setq success t)
	76	(let ((cursor-in-echo-area t))
	77	(message "Please type %s"
	78	(if integers-only "an integer" "a number"))
	79	(sit-for 1)))))
	80	number))
	81
7d18d35c JB	82	(defun real-path-name (name &optional default)
	83	(file-truename (expand-file-name name default)))
	84
	85	;; It's not clear what to return if the mouse is not in FRAME.
	86	(defun read-mouse-position (frame)
	87	(let ((pos (mouse-position)))
	88	(if (eq (car pos) frame)
	89	(cdr pos))))
	90
	91	(defun switch-to-other-buffer (arg)
	92	"Switch to the previous buffer.
	93	With a numeric arg N, switch to the Nth most recent buffer.
	94	With an arg of 0, buries the current buffer at the
	95	bottom of the buffer stack."
	96	(interactive "p")
	97	(if (eq arg 0)
	98	(bury-buffer (current-buffer)))
	99	(switch-to-buffer
	100	(if (<= arg 1) (other-buffer (current-buffer))
7c7daa22	101	(nth arg
e084483d JB	102	(apply 'nconc
	103	(mapcar
	104	(lambda (buf)
0b9be2e7	105	(if (= ?\ (string-to-char (buffer-name buf)))
e084483d	106	nil
0b9be2e7 JB	107	(list buf)))
0b9be2e7 JB	108	(buffer-list)))))))
e15765f5	109
31e1d920 ER	110	(defalias 'find-face 'internal-find-face)
	111	(defalias 'get-face 'internal-get-face)
	112	(defalias 'try-face-font 'internal-try-face-font)
6b4268b0 RS	113
6b4268b0 RS	114	(defalias 'exec-to-string 'shell-command-to-string)
7d18d35c	115	\f
51566783 RS	116	(defun make-extent (beg end &optional buffer)
	117	(make-overlay beg end buffer))
	118
5e2dfaa4 SM	119	(defun extent-properties (extent) (overlay-properties extent))
5e2dfaa4 SM	120	(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
c9411d2f RS	121
	122	(defun extent-at (pos &optional object property before)
	123	(with-current-buffer (or object (current-buffer))
	124	(let ((overlays (overlays-at pos)))
	125	(when property
	126	(let (filtered)
	127	(while overlays
	128	(if (overlay-get (car overlays) property)
	129	(setq filtered (cons (car overlays) filtered)))
	130	(setq overlays (cdr overlays)))
	131	(setq overlays filtered)))
	132	(setq overlays
	133	(sort overlays
	134	(function (lambda (o1 o2)
	135	(let ((p1 (or (overlay-get o1 'priority) 0))
	136	(p2 (or (overlay-get o2 'priority) 0)))
	137	(or (> p1 p2)
	138	(and (= p1 p2)
	139	(> (overlay-start o1) (overlay-start o2)))))))))
	140	(if before
	141	(nth 1 (memq before overlays))
	142	(car overlays)))))
	143
51566783	144	(defun set-extent-property (extent prop value)
c27d895b RS	145	;; Make sure that separate adjacent extents
	146	;; with the same mouse-face value
	147	;; do not run together as one extent.
	148	(and (eq prop 'mouse-face)
	149	(symbolp value)
	150	(setq value (list value)))
51566783 RS	151	(if (eq prop 'duplicable)
	152	(cond ((and value (not (overlay-get extent prop)))
	153	;; If becoming duplicable, copy all overlayprops to text props.
	154	(add-text-properties (overlay-start extent)
	155	(overlay-end extent)
	156	(overlay-properties extent)
	157	(overlay-buffer extent)))
	158	;; If becoming no longer duplicable, remove these text props.
	159	((and (not value) (overlay-get extent prop))
	160	(remove-text-properties (overlay-start extent)
	161	(overlay-end extent)
	162	(overlay-properties extent)
	163	(overlay-buffer extent))))
	164	;; If extent is already duplicable, put this property
	165	;; on the text as well as on the overlay.
	166	(if (overlay-get extent 'duplicable)
	167	(put-text-property (overlay-start extent)
	168	(overlay-end extent)
	169	prop value (overlay-buffer extent))))
	170	(overlay-put extent prop value))
	171
	172	(defun set-extent-face (extent face)
	173	(set-extent-property extent 'face face))
	174
5e2dfaa4 SM	175	(defun set-extent-end-glyph (extent glyph)
	176	(set-extent-property extent 'after-string glyph))
	177
51566783 RS	178	(defun delete-extent (extent)
	179	(set-extent-property extent 'duplicable nil)
	180	(delete-overlay extent))
	181	\f
7d18d35c JB	182	;; Support the Lucid names with `screen' instead of `frame'.
7d18d35c JB	183
31e1d920 ER	184	(defalias 'current-screen-configuration 'current-frame-configuration)
	185	(defalias 'delete-screen 'delete-frame)
	186	(defalias 'find-file-new-screen 'find-file-other-frame)
	187	(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
	188	(defalias 'find-tag-new-screen 'find-tag-other-frame)
	189	;;(defalias 'focus-screen 'focus-frame)
	190	(defalias 'iconify-screen 'iconify-frame)
	191	(defalias 'mail-new-screen 'mail-other-frame)
	192	(defalias 'make-screen-invisible 'make-frame-invisible)
	193	(defalias 'make-screen-visible 'make-frame-visible)
	194	;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
	195	(defalias 'modify-screen-parameters 'modify-frame-parameters)
	196	(defalias 'next-screen 'next-frame)
	197	;; (defalias 'next-multiscreen-window 'next-multiframe-window)
	198	;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
	199	;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
	200	(defalias 'redraw-screen 'redraw-frame)
	201	;; (defalias 'screen-char-height 'frame-char-height)
	202	;; (defalias 'screen-char-width 'frame-char-width)
	203	;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
	204	;; (defalias 'screen-focus 'frame-focus)
31e1d920 ER	205	(defalias 'screen-list 'frame-list)
	206	;; (defalias 'screen-live-p 'frame-live-p)
	207	(defalias 'screen-parameters 'frame-parameters)
	208	(defalias 'screen-pixel-height 'frame-pixel-height)
	209	(defalias 'screen-pixel-width 'frame-pixel-width)
	210	(defalias 'screen-root-window 'frame-root-window)
	211	(defalias 'screen-selected-window 'frame-selected-window)
	212	(defalias 'lower-screen 'lower-frame)
	213	(defalias 'raise-screen 'raise-frame)
	214	(defalias 'screen-visible-p 'frame-visible-p)
31e1d920 ER	215	(defalias 'screenp 'framep)
	216	(defalias 'select-screen 'select-frame)
	217	(defalias 'selected-screen 'selected-frame)
	218	;; (defalias 'set-screen-configuration 'set-frame-configuration)
	219	;; (defalias 'set-screen-height 'set-frame-height)
	220	(defalias 'set-screen-position 'set-frame-position)
	221	(defalias 'set-screen-size 'set-frame-size)
e084483d	222	;; (defalias 'set-screen-width 'set-frame-width)
31e1d920 ER	223	(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
	224	;; (defalias 'unfocus-screen 'unfocus-frame)
	225	(defalias 'visible-screen-list 'visible-frame-list)
	226	(defalias 'window-screen 'window-frame)
	227	(defalias 'x-create-screen 'x-create-frame)
c731cd93	228	(defalias 'x-new-screen 'make-frame)
6de6752c	229
e084483d JB	230	(provide 'lucid)
e084483d JB	231
60370d40	232	;;; lucid.el ends here