1 ;;; gutter-items.el --- Gutter content for XEmacs.
3 ;; Copyright (C) 1999 Free Software Foundation, Inc.
4 ;; Copyright (C) 1999, 2000 Andy Piper.
5 ;; Copyright (C) 2000 Ben Wing.
7 ;; Maintainer: XEmacs Development Team
8 ;; Keywords: frames, extensions, internal, dumped
10 ;; This file is part of XEmacs.
12 ;; XEmacs is free software; you can redistribute it and/or modify it
13 ;; under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; XEmacs is distributed in the hope that it will be useful, but
18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 ;; General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with Xmacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
27 ;; Some of this is taken from the buffer-menu stuff in menubar-items.el
31 (defgroup buffers-tab nil
32 "Customization of `Buffers' tab."
35 (defvar gutter-buffers-tab nil
36 "A tab widget in the gutter for displaying buffers.
37 Do not set this. Use `set-glyph-image' to change the properties of the tab.")
39 (defcustom gutter-buffers-tab-visible-p
40 (gutter-element-visible-p default-gutter-visible-p 'buffers-tab)
41 "Whether the buffers tab is globally visible.
42 This option should be set through the options menu."
45 :set #'(lambda (var val)
46 (set-gutter-element-visible-p default-gutter-visible-p
48 (setq gutter-buffers-tab-visible-p val)))
50 (defcustom gutter-buffers-tab-enabled t
51 "*Whether to enable support for buffers tab in the gutter.
52 This is different to `gutter-buffers-tab-visible-p' which still runs hooks
53 even when the gutter is invisible."
57 (defvar gutter-buffers-tab-orientation 'top
58 "Where the buffers tab currently is. Do not set this.")
60 (defcustom buffers-tab-max-size 6
61 "*Maximum number of entries which may appear on the \"Buffers\" tab.
62 If this is 10, then only the ten most-recently-selected buffers will be
63 shown. If this is nil, then all buffers will be shown. Setting this to
64 a large number or nil will slow down tab responsiveness."
65 :type '(choice (const :tag "Show all" nil)
69 (defcustom buffers-tab-switch-to-buffer-function 'buffers-tab-switch-to-buffer
70 "*The function to call to select a buffer from the buffers tab.
71 `switch-to-buffer' is a good choice, as is `pop-to-buffer'."
72 :type '(radio (function-item switch-to-buffer)
73 (function-item pop-to-buffer)
74 (function :tag "Other"))
77 (defcustom buffers-tab-omit-function 'buffers-menu-omit-invisible-buffers
78 "*If non-nil, a function specifying the buffers to omit from the buffers tab.
79 This is passed a buffer and should return non-nil if the buffer should be
80 omitted. The default value `buffers-menu-omit-invisible-buffers' omits
81 buffers that are normally considered \"invisible\" (those whose name
82 begins with a space)."
83 :type '(choice (const :tag "None" nil)
87 (defcustom buffers-tab-selection-function 'select-buffers-tab-buffers-by-mode
88 "*If non-nil, a function specifying the buffers to select from the
89 buffers tab. This is passed two buffers and should return non-nil if
90 the second buffer should be selected. The default value
91 `select-buffers-tab-buffers-by-mode' groups buffers by major mode and
92 by `buffers-tab-grouping-regexp'."
94 :type '(choice (const :tag "None" nil)
98 (defcustom buffers-tab-filter-functions (list buffers-tab-selection-function)
99 "*If non-nil, a list of functions specifying the buffers to select
100 from the buffers tab.
101 Each function in the list is passed two buffers, the buffer to
102 potentially select and the context buffer, and should return non-nil
103 if the first buffer should be selected. The default value groups
104 buffers by major mode and by `buffers-tab-grouping-regexp'."
106 :type '(choice (const :tag "None" nil)
110 (defcustom buffers-tab-sort-function nil
111 "*If non-nil, a function specifying the buffers to select from the
112 buffers tab. This is passed the buffer list and returns the list in the
113 order desired for the tab widget. The default value `nil' leaves the
114 list in `buffer-list' order (usual most-recently-selected-first)."
116 :type '(choice (const :tag "None" nil)
120 (make-face 'buffers-tab "Face for displaying the buffers tab.")
121 (set-face-parent 'buffers-tab 'default)
123 (defcustom buffers-tab-face 'buffers-tab
124 "*Face to use for displaying the buffers tab."
128 (defcustom buffers-tab-grouping-regexp
129 '("^\\(gnus-\\|message-mode\\|mime/viewer-mode\\)"
130 "^\\(emacs-lisp-\\|lisp-\\)")
131 "*If non-nil, a list of regular expressions for buffer grouping.
132 Each regular expression is applied to the current major-mode symbol
133 name and mode-name, if it matches then any other buffers that match
134 the same regular expression be added to the current group."
135 :type '(choice (const :tag "None" nil)
139 (defcustom buffers-tab-format-buffer-line-function 'format-buffers-tab-line
140 "*The function to call to return a string to represent a buffer in the
141 buffers tab. The function is passed a buffer and should return a
142 string. The default value `format-buffers-tab-line' just returns the
143 name of the buffer, optionally truncated to
144 `buffers-tab-max-buffer-line-length'. Also check out
145 `slow-format-buffers-menu-line' which returns a whole bunch of info
150 (defvar buffers-tab-default-buffer-line-length
151 (make-specifier-and-init 'generic '((global ((default) . 25))) t)
152 "*Maximum length of text which may appear in a \"Buffers\" tab.
153 This is a specifier, use set-specifier to modify it.")
155 (defcustom buffers-tab-max-buffer-line-length
156 (specifier-instance buffers-tab-default-buffer-line-length)
157 "*Maximum length of text which may appear in a \"Buffers\" tab.
158 Buffer names over this length will be truncated with elipses.
159 If this is 0, then the full buffer name will be shown."
160 :type '(choice (const :tag "Show all" 0)
163 :set #'(lambda (var val)
164 (set-specifier buffers-tab-default-buffer-line-length val)
165 (setq buffers-tab-max-buffer-line-length val)))
167 (defun buffers-tab-switch-to-buffer (buffer)
168 "For use as a value for `buffers-tab-switch-to-buffer-function'."
169 (unless (eq (window-buffer) buffer)
170 ;; this used to add the norecord flag to both calls below.
171 ;; this is bogus because it is a pervasive assumption in XEmacs
172 ;; that the current buffer is at the front of the buffers list.
173 ;; for example, select an item and then do M-C-l
174 ;; (switch-to-other-buffer). Things get way confused.
175 (if (> (length (windows-of-buffer buffer)) 0)
176 (select-window (car (windows-of-buffer buffer)))
177 (switch-to-buffer buffer))))
179 (defun select-buffers-tab-buffers-by-mode (buffer-to-select buf1)
180 "For use as a value of `buffers-tab-selection-function'.
181 This selects buffers by major mode `buffers-tab-grouping-regexp'."
182 (let ((mode1 (symbol-name (symbol-value-in-buffer 'major-mode buf1)))
183 (mode2 (symbol-name (symbol-value-in-buffer 'major-mode
185 (modenm1 (symbol-value-in-buffer 'mode-name buf1))
186 (modenm2 (symbol-value-in-buffer 'mode-name buffer-to-select)))
187 (cond ((or (eq mode1 mode2)
189 (and (string-match "^[^-]+-" mode1)
191 (concat "^" (regexp-quote
192 (substring mode1 0 (match-end 0))))
194 (and buffers-tab-grouping-regexp
195 (find-if #'(lambda (x)
197 (and (string-match x mode1)
198 (string-match x mode2))
199 (and (string-match x modenm1)
200 (string-match x modenm2))))
201 buffers-tab-grouping-regexp)))
205 (defun format-buffers-tab-line (buffer)
206 "For use as a value of `buffers-tab-format-buffer-line-function'.
207 This just returns the buffer's name, optionally truncated."
208 (let ((len (specifier-instance buffers-tab-default-buffer-line-length)))
210 (> (length (buffer-name buffer)) len))
211 (if (string-match ".*<.>$" (buffer-name buffer))
212 (concat (substring (buffer-name buffer)
214 (substring (buffer-name buffer) -3))
215 (concat (substring (buffer-name buffer)
217 (buffer-name buffer))))
219 (defsubst build-buffers-tab-internal (buffers)
225 (funcall buffers-tab-format-buffer-line-function
227 (list buffers-tab-switch-to-buffer-function
228 (buffer-name buffer))
230 (when selected (setq selected nil))))
233 ;;; #### SJT would like this function to have a sort function list. I
234 ;;; don't see how this could work given that sorting is not
235 ;;; cumulative --andyp.
236 (defun buffers-tab-items (&optional in-deletion frame force-selection)
237 "Return a list of tab instantiators based on the current buffers list.
238 This function is used as the tab filter for the top-level buffers
239 \"Buffers\" tab. It dynamically creates a list of tab instantiators
240 to use as the contents of the tab. The contents and order of the list
241 is controlled by `buffers-tab-filter-functions' which by default
242 groups buffers according to major mode and removes invisible buffers.
243 You can control how many buffers will be shown by setting
244 `buffers-tab-max-size'. You can control the text of the tab items by
245 redefining the function `format-buffers-menu-line'."
247 ;; NB it is too late if we run the omit function as part of the
248 ;; filter functions because we need to know which buffer is the
249 ;; context buffer before they get run.
250 (let* ((buffers (delete-if
251 buffers-tab-omit-function (buffer-list frame)))
252 (first-buf (car buffers)))
253 ;; maybe force the selected window
254 (when (and force-selection
256 (not (eq first-buf (window-buffer (selected-window frame)))))
257 (setq buffers (cons (window-buffer (selected-window frame))
258 (delq first-buf buffers))))
259 ;; if we're in deletion ignore the current buffer
261 (setq buffers (delq (current-buffer) buffers))
262 (setq first-buf (car buffers)))
264 (when buffers-tab-filter-functions
268 (mapcar #'(lambda (buf)
270 (mapc #'(lambda (fun)
271 (unless (funcall fun buf first-buf)
273 buffers-tab-filter-functions)
276 ;; maybe shorten list of buffers
277 (and (integerp buffers-tab-max-size)
278 (> buffers-tab-max-size 1)
279 (> (length buffers) buffers-tab-max-size)
280 (setcdr (nthcdr (1- buffers-tab-max-size) buffers) nil))
281 ;; sort buffers in group (default is most-recently-selected)
282 (when buffers-tab-sort-function
283 (setq buffers (funcall buffers-tab-sort-function buffers)))
284 ;; convert list of buffers to list of structures used by tab widget
285 (setq buffers (build-buffers-tab-internal buffers))
288 (defun add-tab-to-gutter ()
289 "Put a tab control in the gutter area to hold the most recent buffers."
290 (setq gutter-buffers-tab-orientation (default-gutter-position))
291 (let* ((gutter-string (copy-sequence "\n"))
292 (gutter-buffers-tab-extent (make-extent 0 1 gutter-string)))
293 (set-extent-begin-glyph gutter-buffers-tab-extent
294 (setq gutter-buffers-tab
296 ;; Nuke all existing tabs
297 (remove-gutter-element top-gutter 'buffers-tab)
298 (remove-gutter-element bottom-gutter 'buffers-tab)
299 (remove-gutter-element left-gutter 'buffers-tab)
300 (remove-gutter-element right-gutter 'buffers-tab)
301 ;; Put tabs into all devices that will be able to display them
304 (when (valid-image-instantiator-format-p 'tab-control x)
305 (cond ((eq gutter-buffers-tab-orientation 'top)
306 ;; This looks better than a 3d border
307 (set-specifier top-gutter-border-width 0 'global x)
308 (set-gutter-element top-gutter 'buffers-tab
309 gutter-string 'global x))
310 ((eq gutter-buffers-tab-orientation 'bottom)
311 (set-specifier bottom-gutter-border-width 0 'global x)
312 (set-gutter-element bottom-gutter 'buffers-tab
313 gutter-string 'global x))
314 ((eq gutter-buffers-tab-orientation 'left)
315 (set-specifier left-gutter-border-width 0 'global x)
316 (set-gutter-element left-gutter 'buffers-tab
317 gutter-string 'global x))
318 ((eq gutter-buffers-tab-orientation 'right)
319 (set-specifier right-gutter-border-width 0 'global x)
320 (set-gutter-element right-gutter 'buffers-tab
321 gutter-string 'global x))
323 (console-type-list))))
325 (defun update-tab-in-gutter (frame &optional force-selection)
326 "Update the tab control in the gutter area."
327 ;; dedicated frames don't get tabs
328 (unless (or (window-dedicated-p (frame-selected-window frame))
329 (frame-property frame 'popup))
330 (when (specifier-instance default-gutter-visible-p frame)
331 (unless (and gutter-buffers-tab
332 (eq (default-gutter-position)
333 gutter-buffers-tab-orientation))
335 (when (valid-image-instantiator-format-p 'tab-control frame)
336 (let ((items (buffers-tab-items nil frame force-selection)))
340 (vector 'tab-control :descriptor "Buffers" :face buffers-tab-face
341 :orientation gutter-buffers-tab-orientation
342 (if (or (eq gutter-buffers-tab-orientation 'top)
343 (eq gutter-buffers-tab-orientation 'bottom))
344 :pixel-width :pixel-height)
345 (if (or (eq gutter-buffers-tab-orientation 'top)
346 (eq gutter-buffers-tab-orientation 'bottom))
347 '(gutter-pixel-width) '(gutter-pixel-height))
350 ;; set-glyph-image will not make the gutter dirty
351 (set-gutter-dirty-p gutter-buffers-tab-orientation)))))))
353 ;; A myriad of different update hooks all doing slightly different things
357 ;; don't add the hooks if the user really doesn't want them
358 (when gutter-buffers-tab-enabled
359 (add-hook 'create-frame-hook
361 (when gutter-buffers-tab (update-tab-in-gutter frame t))))
362 (add-hook 'buffer-list-changed-hook 'update-tab-in-gutter)
363 (add-hook 'default-gutter-position-changed-hook
365 (when gutter-buffers-tab
366 (mapc #'update-tab-in-gutter (frame-list)))))
367 (add-hook 'gutter-element-visibility-changed-hook
368 #'(lambda (prop visible-p)
369 (when (and (eq prop 'buffers-tab) visible-p)
370 (mapc #'update-tab-in-gutter (frame-list)))))
371 (update-tab-in-gutter (selected-frame) t))))
375 ;; ripped off from message display
377 (defcustom progress-feedback-use-echo-area nil
378 "*Whether progress gauge display should display in the echo area.
379 If NIL then progress gauges will be displayed with whatever native widgets
380 are available on the current console. If non-NIL then progress display will be
381 textual and displayed in the echo area."
385 (defvar progress-glyph-height 24
386 "Height of the progress gauge glyph.")
388 (defvar progress-feedback-popup-period 0.5
389 "The time that the progress gauge should remain up after completion")
391 (defcustom progress-feedback-style 'large
392 "*Control the appearance of the progress gauge.
393 If 'large, the default, then the progress-feedback text is displayed
394 above the gauge itself. If 'small then the gauge and text are arranged
397 :type '(choice (const :tag "large" large)
398 (const :tag "small" small)))
401 (defvar progress-text-instantiator [string :data ""])
402 (defvar progress-layout-glyph (make-glyph))
403 (defvar progress-layout-instantiator nil)
405 (defvar progress-gauge-instantiator
408 :pixel-height (eval progress-glyph-height)
410 :descriptor "Progress"])
412 (defun set-progress-feedback-instantiator (&optional locale)
414 ((eq progress-feedback-style 'small)
415 (setq progress-glyph-height 16)
416 (setq progress-layout-instantiator
418 :orientation horizontal
420 :items (,progress-gauge-instantiator
422 :pixel-height (eval progress-glyph-height)
423 ;; 'quit is special and acts "asynchronously".
424 :descriptor "Stop" :callback 'quit]
425 ,progress-text-instantiator)])
426 (set-glyph-image progress-layout-glyph progress-layout-instantiator
429 (setq progress-glyph-height 24)
430 (setq progress-layout-instantiator
432 :orientation vertical :justify left
434 :items (,progress-text-instantiator
436 :orientation horizontal
437 :items (,progress-gauge-instantiator
439 :pixel-height (eval progress-glyph-height)
441 ;; 'quit is special and acts "asynchronously".
442 :callback 'quit])])])
443 (set-glyph-image progress-layout-glyph progress-layout-instantiator
446 (defvar progress-abort-glyph (make-glyph))
448 (defun set-progress-abort-instantiator (&optional locale)
449 (set-glyph-image progress-abort-glyph
450 `[layout :orientation vertical :justify left
451 :items (,progress-text-instantiator
454 :pixel-height progress-glyph-height
455 :orientation horizontal])]
458 (defvar progress-stack nil
459 "An alist of label/string pairs representing active progress gauges.
460 The first element in the list is currently displayed in the gutter area.
461 Do not modify this directly--use the `progress-feedback' or
462 `display-progress-feedback'/`clear-progress-feedback' functions.")
464 (defun progress-feedback-displayed-p (&optional return-string frame)
465 "Return a non-nil value if a progress gauge is presently displayed in the
466 gutter area. If optional argument RETURN-STRING is non-nil,
467 return a string containing the message, otherwise just return t."
468 (let ((buffer (get-buffer-create " *Gutter Area*")))
469 (and (< (point-min buffer) (point-max buffer))
471 (buffer-substring nil nil buffer)
474 ;;; Returns the string which remains in the echo area, or nil if none.
475 ;;; If label is nil, the whole message stack is cleared.
476 (defun clear-progress-feedback (&optional label frame no-restore)
477 "Remove any progress gauge with LABEL from the progress gauge-stack,
478 erasing it from the gutter area if it's currently displayed there.
479 If a message remains at the head of the progress-stack and NO-RESTORE
480 is nil, it will be displayed. The string which remains in the gutter
481 area will be returned, or nil if the progress-stack is now empty.
482 If LABEL is nil, the entire progress-stack is cleared.
484 Unless you need the return value or you need to specify a label,
485 you should just use (progress nil)."
486 (if (or (not (valid-image-instantiator-format-p 'progress-gauge frame))
487 progress-feedback-use-echo-area)
488 (clear-message label frame nil no-restore)
489 (or frame (setq frame (selected-frame)))
490 (remove-progress-feedback label frame)
491 (let ((inhibit-read-only t)
492 (zmacs-region-stays zmacs-region-stays)) ; preserve from change
493 (erase-buffer (get-buffer-create " *Gutter Area*")))
495 nil ; just preparing to put another msg up
497 (let ((oldmsg (cdr (car progress-stack))))
498 (raw-append-progress-feedback oldmsg nil frame)
500 ;; nothing to display so get rid of the gauge
501 (set-specifier bottom-gutter-border-width 0 frame)
502 (set-gutter-element-visible-p bottom-gutter-visible-p
503 'progress nil frame)))))
505 (defun progress-feedback-clear-when-idle (&optional label)
506 (add-one-shot-hook 'pre-idle-hook
508 (clear-progress-feedback ',label))))
510 (defun remove-progress-feedback (&optional label frame)
511 ;; If label is nil, we want to remove all matching progress gauges.
512 (while (and progress-stack
513 (or (null label) ; null label means clear whole stack
514 (eq label (car (car progress-stack)))))
515 (setq progress-stack (cdr progress-stack)))
516 (let ((s progress-stack))
518 (let ((msg (car (cdr s))))
519 (if (eq label (car msg))
521 (setcdr s (cdr (cdr s))))
522 (setq s (cdr s)))))))
524 (defun progress-feedback-dispatch-non-command-events ()
525 ;; don't allow errors to hose things
527 ;; (sit-for 0) is too agressive and cause more display than we
529 (dispatch-non-command-events)
532 (defun append-progress-feedback (label message &optional value frame)
533 (or frame (setq frame (selected-frame)))
534 ;; Add a new entry to the message-stack, or modify an existing one
535 (let* ((top (car progress-stack))
537 (if (eq label (car top))
540 (if (equal tmsg message)
542 (set-instantiator-property progress-gauge-instantiator :value value)
543 (set-progress-feedback-instantiator (frame-selected-window frame)))
544 (raw-append-progress-feedback message value frame))
545 (redisplay-gutter-area))
546 (push (cons label message) progress-stack)
547 (raw-append-progress-feedback message value frame))
548 (progress-feedback-dispatch-non-command-events)
549 ;; either get command events or sit waiting for them
551 ; (sit-for progress-feedback-popup-period nil)
552 (clear-progress-feedback label))))
554 (defun abort-progress-feedback (label message &optional frame)
555 (if (or (not (valid-image-instantiator-format-p 'progress-gauge frame))
556 progress-feedback-use-echo-area)
557 (display-message label (concat message "aborted.") frame)
558 (or frame (setq frame (selected-frame)))
559 ;; Add a new entry to the message-stack, or modify an existing one
560 (let* ((top (car progress-stack))
561 (inhibit-read-only t)
562 (zmacs-region-stays zmacs-region-stays))
563 (if (eq label (car top))
565 (push (cons label message) progress-stack))
566 (unless (equal message "")
567 (insert-string message (get-buffer-create " *Gutter Area*"))
568 (let* ((gutter-string (copy-sequence "\n"))
569 (ext (make-extent 0 1 gutter-string)))
570 ;; do some funky display here.
571 (set-extent-begin-glyph ext progress-abort-glyph)
572 ;; fixup the gutter specifiers
573 (set-gutter-element bottom-gutter 'progress gutter-string frame)
574 (set-specifier bottom-gutter-border-width 2 frame)
575 (set-instantiator-property progress-text-instantiator :data message)
576 (set-progress-abort-instantiator (frame-selected-window frame))
577 (set-specifier bottom-gutter-height 'autodetect frame)
578 (set-gutter-element-visible-p bottom-gutter-visible-p
580 ;; we have to do this so redisplay is up-to-date and so
581 ;; redisplay-gutter-area performs optimally.
582 (redisplay-gutter-area)
583 (sit-for progress-feedback-popup-period nil)
584 (clear-progress-feedback label frame)
585 (set-extent-begin-glyph ext progress-layout-glyph)
586 (set-gutter-element bottom-gutter 'progress gutter-string frame)
589 (defun raw-append-progress-feedback (message &optional value frame)
590 (unless (equal message "")
591 (let* ((inhibit-read-only t)
592 (zmacs-region-stays zmacs-region-stays)
594 (gutter-string (copy-sequence "\n"))
595 (ext (make-extent 0 1 gutter-string)))
596 (insert-string message (get-buffer-create " *Gutter Area*"))
597 ;; do some funky display here.
598 (set-extent-begin-glyph ext progress-layout-glyph)
599 ;; fixup the gutter specifiers
600 (set-gutter-element bottom-gutter 'progress gutter-string frame)
601 (set-specifier bottom-gutter-border-width 2 frame)
602 (set-instantiator-property progress-gauge-instantiator :value val)
603 (set-progress-feedback-instantiator (frame-selected-window frame))
605 (set-instantiator-property progress-text-instantiator :data message)
606 (set-progress-feedback-instantiator (frame-selected-window frame))
607 (if (and (eq (specifier-instance bottom-gutter-height frame)
609 (gutter-element-visible-p bottom-gutter-visible-p
611 ;; if the gauge is already visible then just draw the gutter
612 ;; checking for user events
614 (redisplay-gutter-area)
615 (progress-feedback-dispatch-non-command-events))
616 ;; otherwise make the gutter visible and redraw the frame
617 (set-specifier bottom-gutter-height 'autodetect frame)
618 (set-gutter-element-visible-p bottom-gutter-visible-p
620 ;; we have to do this so redisplay is up-to-date and so
621 ;; redisplay-gutter-area performs optimally. This may also
622 ;; make sure the frame geometry looks ok.
623 (progress-feedback-dispatch-non-command-events)
624 (redisplay-frame frame)
627 (defun display-progress-feedback (label message &optional value frame)
628 "Display a progress gauge and message in the bottom gutter area.
629 First argument LABEL is an identifier for this message. MESSAGE is
630 the string to display. Use `clear-progress-feedback' to remove a labelled
632 (cond ((eq value 'abort)
633 (abort-progress-feedback label message frame))
634 ((or (not (valid-image-instantiator-format-p 'progress-gauge frame))
635 progress-feedback-use-echo-area)
636 (display-message label
637 (concat message (if (eq value 100) "done."
638 (make-string (/ value 5) ?.)))
641 (append-progress-feedback label message value frame))))
643 (defun current-progress-feedback (&optional frame)
644 "Return the current progress gauge in the gutter area, or nil.
645 The FRAME argument is currently unused."
646 (cdr (car progress-stack)))
648 ;;; may eventually be frame-dependent
649 (defun current-progress-feedback-label (&optional frame)
650 (car (car progress-stack)))
652 (defun progress-feedback (fmt &optional value &rest args)
653 "Print a progress gauge and message in the bottom gutter area of the frame.
654 The arguments are the same as to `format'.
656 If the only argument is nil, clear any existing progress gauge."
658 (if (and (null fmt) (null args))
660 (clear-progress-feedback nil))
661 (let ((str (apply 'format fmt args)))
662 (display-progress-feedback 'progress str value)
665 (defun progress-feedback-with-label (label fmt &optional value &rest args)
666 "Print a progress gauge and message in the bottom gutter area of the frame.
667 First argument LABEL is an identifier for this progress gauge. The rest of the
668 arguments are the same as to `format'."
669 ;; #### sometimes the buffer gets changed temporarily. I don't know
670 ;; why this is, so protect against it.
672 (if (and (null fmt) (null args))
674 (clear-progress-feedback label nil))
675 (let ((str (apply 'format fmt args)))
676 (display-progress-feedback label str value)
679 (provide 'gutter-items)
680 ;;; gutter-items.el ends here.