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

;;; 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, 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
f8c25f1b	3	;; Copyright (C) 1993, 1995 Free Software Foundation, Inc.
6de6752c RS	4
	5	;; This file is part of GNU Emacs.
	6
	7	;; GNU Emacs is free software; you can redistribute it and/or modify
	8	;; it under the terms of the GNU General Public License as published by
	9	;; the Free Software Foundation; either version 2, or (at your option)
	10	;; any later version.
	11
	12	;; GNU Emacs is distributed in the hope that it will be useful,
	13	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	;; GNU General Public License for more details.
	16
	17	;; You should have received a copy of the GNU General Public License
b578f267 EN	18	;; along with GNU Emacs; see the file COPYING. If not, write to the
	19	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	20	;; Boston, MA 02111-1307, USA.
6de6752c	21
60370d40 PJ	22	;;; Commentary:
60370d40 PJ	23
b578f267	24	;;; Code:
6de6752c	25
5e2dfaa4 SM	26	;; XEmacs autoloads CL so we might as well make use of it.
5e2dfaa4 SM	27	(require 'cl)
330fba95	28
31e1d920	29	(defalias 'current-time-seconds 'current-time)
330fba95	30
7d18d35c	31	(defun map-keymap (function keymap &optional sort-first)
3e6580d0	32	"Call FUNCTION for every binding in KEYMAP.
5e2dfaa4	33	This does not include bindings inherited from a parent keymap.
3e6580d0 JB	34	FUNCTION receives two arguments each time it is called:
3e6580d0 JB	35	the character (more generally, the event type) that is bound,
aef4422e RS	36	and the binding it has.
	37
	38	Note that passing the event type directly to `define-key' does not work
	39	in Emacs 19. We do not emulate that particular feature of Lucid Emacs.
	40	If your code does that, modify it to make a vector containing the event
	41	type that you get. That will work in both versions of Emacs."
7d18d35c JB	42	(if sort-first
7d18d35c JB	43	(let (list)
5e2dfaa4 SM	44	(cl-map-keymap (lambda (a b) (push (cons a b) list))
5e2dfaa4 SM	45	keymap)
7d18d35c	46	(setq list (sort list
5e2dfaa4 SM	47	(lambda (a b)
	48	(setq a (car a) b (car b))
	49	(if (integerp a)
	50	(if (integerp b) (< a b)
	51	t)
	52	(if (integerp b) t
	53	(string< a b))))))
	54	(dolist (p list)
	55	(funcall function (car p) (cdr p))))
	56	(cl-map-keymap function keymap)))
7d18d35c	57
3b787dc3 RS	58	(defun read-number (prompt &optional integers-only)
	59	"Read a number from the minibuffer.
	60	Keep reentering the minibuffer until we get suitable input.
	61	If optional argument INTEGERS-ONLY is non-nil, insist on an integer."
	62	(interactive)
	63	(let (success
	64	(number nil)
	65	(predicate (if integers-only 'integerp 'numberp)))
	66	(while (not success)
	67	(let ((input-string (read-string prompt)))
	68	(condition-case ()
	69	(setq number (read input-string))
	70	(error))
	71	(if (funcall predicate number)
	72	(setq success t)
	73	(let ((cursor-in-echo-area t))
	74	(message "Please type %s"
	75	(if integers-only "an integer" "a number"))
	76	(sit-for 1)))))
	77	number))
	78
7d18d35c JB	79	(defun real-path-name (name &optional default)
	80	(file-truename (expand-file-name name default)))
	81
	82	;; It's not clear what to return if the mouse is not in FRAME.
	83	(defun read-mouse-position (frame)
	84	(let ((pos (mouse-position)))
	85	(if (eq (car pos) frame)
	86	(cdr pos))))
	87
	88	(defun switch-to-other-buffer (arg)
	89	"Switch to the previous buffer.
	90	With a numeric arg N, switch to the Nth most recent buffer.
	91	With an arg of 0, buries the current buffer at the
	92	bottom of the buffer stack."
	93	(interactive "p")
	94	(if (eq arg 0)
	95	(bury-buffer (current-buffer)))
	96	(switch-to-buffer
	97	(if (<= arg 1) (other-buffer (current-buffer))
7c7daa22	98	(nth arg
e084483d JB	99	(apply 'nconc
	100	(mapcar
	101	(lambda (buf)
0b9be2e7	102	(if (= ?\ (string-to-char (buffer-name buf)))
e084483d	103	nil
0b9be2e7 JB	104	(list buf)))
0b9be2e7 JB	105	(buffer-list)))))))
e15765f5	106
31e1d920 ER	107	(defalias 'find-face 'internal-find-face)
	108	(defalias 'get-face 'internal-get-face)
	109	(defalias 'try-face-font 'internal-try-face-font)
6b4268b0 RS	110
6b4268b0 RS	111	(defalias 'exec-to-string 'shell-command-to-string)
7d18d35c	112	\f
51566783 RS	113	(defun make-extent (beg end &optional buffer)
	114	(make-overlay beg end buffer))
	115
5e2dfaa4 SM	116	(defun extent-properties (extent) (overlay-properties extent))
5e2dfaa4 SM	117	(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
c9411d2f RS	118
	119	(defun extent-at (pos &optional object property before)
	120	(with-current-buffer (or object (current-buffer))
	121	(let ((overlays (overlays-at pos)))
	122	(when property
	123	(let (filtered)
	124	(while overlays
	125	(if (overlay-get (car overlays) property)
	126	(setq filtered (cons (car overlays) filtered)))
	127	(setq overlays (cdr overlays)))
	128	(setq overlays filtered)))
	129	(setq overlays
	130	(sort overlays
	131	(function (lambda (o1 o2)
	132	(let ((p1 (or (overlay-get o1 'priority) 0))
	133	(p2 (or (overlay-get o2 'priority) 0)))
	134	(or (> p1 p2)
	135	(and (= p1 p2)
	136	(> (overlay-start o1) (overlay-start o2)))))))))
	137	(if before
	138	(nth 1 (memq before overlays))
	139	(car overlays)))))
	140
51566783	141	(defun set-extent-property (extent prop value)
c27d895b RS	142	;; Make sure that separate adjacent extents
	143	;; with the same mouse-face value
	144	;; do not run together as one extent.
	145	(and (eq prop 'mouse-face)
	146	(symbolp value)
	147	(setq value (list value)))
51566783 RS	148	(if (eq prop 'duplicable)
	149	(cond ((and value (not (overlay-get extent prop)))
	150	;; If becoming duplicable, copy all overlayprops to text props.
	151	(add-text-properties (overlay-start extent)
	152	(overlay-end extent)
	153	(overlay-properties extent)
	154	(overlay-buffer extent)))
	155	;; If becoming no longer duplicable, remove these text props.
	156	((and (not value) (overlay-get extent prop))
	157	(remove-text-properties (overlay-start extent)
	158	(overlay-end extent)
	159	(overlay-properties extent)
	160	(overlay-buffer extent))))
	161	;; If extent is already duplicable, put this property
	162	;; on the text as well as on the overlay.
	163	(if (overlay-get extent 'duplicable)
	164	(put-text-property (overlay-start extent)
	165	(overlay-end extent)
	166	prop value (overlay-buffer extent))))
	167	(overlay-put extent prop value))
	168
	169	(defun set-extent-face (extent face)
	170	(set-extent-property extent 'face face))
	171
5e2dfaa4 SM	172	(defun set-extent-end-glyph (extent glyph)
	173	(set-extent-property extent 'after-string glyph))
	174
51566783 RS	175	(defun delete-extent (extent)
	176	(set-extent-property extent 'duplicable nil)
	177	(delete-overlay extent))
	178	\f
7d18d35c JB	179	;; Support the Lucid names with `screen' instead of `frame'.
7d18d35c JB	180
31e1d920 ER	181	(defalias 'current-screen-configuration 'current-frame-configuration)
	182	(defalias 'delete-screen 'delete-frame)
	183	(defalias 'find-file-new-screen 'find-file-other-frame)
	184	(defalias 'find-file-read-only-new-screen 'find-file-read-only-other-frame)
	185	(defalias 'find-tag-new-screen 'find-tag-other-frame)
	186	;;(defalias 'focus-screen 'focus-frame)
	187	(defalias 'iconify-screen 'iconify-frame)
	188	(defalias 'mail-new-screen 'mail-other-frame)
	189	(defalias 'make-screen-invisible 'make-frame-invisible)
	190	(defalias 'make-screen-visible 'make-frame-visible)
	191	;; (defalias 'minibuffer-screen-list 'minibuffer-frame-list)
	192	(defalias 'modify-screen-parameters 'modify-frame-parameters)
	193	(defalias 'next-screen 'next-frame)
	194	;; (defalias 'next-multiscreen-window 'next-multiframe-window)
	195	;; (defalias 'previous-multiscreen-window 'previous-multiframe-window)
	196	;; (defalias 'redirect-screen-focus 'redirect-frame-focus)
	197	(defalias 'redraw-screen 'redraw-frame)
	198	;; (defalias 'screen-char-height 'frame-char-height)
	199	;; (defalias 'screen-char-width 'frame-char-width)
	200	;; (defalias 'screen-configuration-to-register 'frame-configuration-to-register)
	201	;; (defalias 'screen-focus 'frame-focus)
31e1d920 ER	202	(defalias 'screen-list 'frame-list)
	203	;; (defalias 'screen-live-p 'frame-live-p)
	204	(defalias 'screen-parameters 'frame-parameters)
	205	(defalias 'screen-pixel-height 'frame-pixel-height)
	206	(defalias 'screen-pixel-width 'frame-pixel-width)
	207	(defalias 'screen-root-window 'frame-root-window)
	208	(defalias 'screen-selected-window 'frame-selected-window)
	209	(defalias 'lower-screen 'lower-frame)
	210	(defalias 'raise-screen 'raise-frame)
	211	(defalias 'screen-visible-p 'frame-visible-p)
31e1d920 ER	212	(defalias 'screenp 'framep)
	213	(defalias 'select-screen 'select-frame)
	214	(defalias 'selected-screen 'selected-frame)
	215	;; (defalias 'set-screen-configuration 'set-frame-configuration)
	216	;; (defalias 'set-screen-height 'set-frame-height)
	217	(defalias 'set-screen-position 'set-frame-position)
	218	(defalias 'set-screen-size 'set-frame-size)
e084483d	219	;; (defalias 'set-screen-width 'set-frame-width)
31e1d920 ER	220	(defalias 'switch-to-buffer-new-screen 'switch-to-buffer-other-frame)
	221	;; (defalias 'unfocus-screen 'unfocus-frame)
	222	(defalias 'visible-screen-list 'visible-frame-list)
	223	(defalias 'window-screen 'window-frame)
	224	(defalias 'x-create-screen 'x-create-frame)
c731cd93	225	(defalias 'x-new-screen 'make-frame)
6de6752c	226
e084483d JB	227	(provide 'lucid)
e084483d JB	228
60370d40	229	;;; lucid.el ends here