121 lines
3.8 KiB
Scheme
121 lines
3.8 KiB
Scheme
#| -*-Scheme-*-
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Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
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1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016,
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2017, 2018, 2019, 2020 Massachusetts Institute of Technology
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This file is part of MIT/GNU Scheme.
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MIT/GNU Scheme 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 of the License, or (at
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your option) any later version.
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MIT/GNU Scheme is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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 MIT/GNU Scheme; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
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USA.
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|#
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;;;; Create a *World* buffer containing the world report.
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(define-command monitor-world
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"Find or create a buffer named *World*, insert a world report into
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it, and spawn a thread to update it after every
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\\[world-monitor-sleep] seconds."
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()
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(lambda ()
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(let* ((buffer (find-or-create-buffer "*World*"))
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(thread (buffer-get buffer 'WORLD-MONITOR #f)))
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(if (not thread)
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(start-world-monitor buffer))
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(pop-up-buffer buffer #f))))
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(define-variable world-monitor-sleep
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"Number of seconds the world monitor should sleep between reports."
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1.
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(lambda (object)
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(and (flo:flonum? object)
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(flo:< .09 object))))
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(define (start-world-monitor buffer)
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(set-buffer-major-mode! buffer (ref-mode-object read-only))
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(local-set-variable! truncate-lines #t buffer)
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(let ((registration #f)
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(report #f))
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(define (new-report)
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(call-with-output-string
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(lambda (port)
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(world-report port))))
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(define (sleep)
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(sleep-current-thread
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(flo:round->exact
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(flo:* 1000. (ref-variable world-monitor-sleep)))))
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(let ((monitor
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(create-thread editor-thread-root-continuation
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(named-lambda (monitor-world)
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(let loop ()
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(sleep)
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(if (buffer-alive? buffer)
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(begin
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(if registration
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(begin
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(set! report (new-report))
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(inferior-thread-output! registration)))
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(loop))
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(begin
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(if registration
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(deregister-inferior-thread! registration))
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(set! registration #f)
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(exit-current-thread #t)))))
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buffer)))
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(buffer-put! buffer 'WORLD-MONITOR monitor)
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(update-world-monitor! buffer (new-report))
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(set-buffer-point! buffer (buffer-start buffer))
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(set! registration
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(register-inferior-thread!
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monitor (named-lambda (world-monitor-output!)
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(update-world-monitor! buffer report)))))))
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(define (update-world-monitor! buffer report)
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(let ((saved-windows
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(map (lambda (window)
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(cons window
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(cons (mark-temporary-copy (window-point window))
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(window-start-mark window) ;already temporary
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)))
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(buffer-windows buffer)))
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(saved-mark (let ((ring (buffer-mark-ring buffer)))
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(if (ring-empty? ring)
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#f
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(mark-temporary-copy (ring-ref ring 0))))))
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(with-read-only-defeated
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buffer (lambda ()
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(with-group-undo-disabled
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(buffer-group buffer)
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(lambda ()
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(buffer-widen! buffer)
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(region-delete! (buffer-region buffer))
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(insert-string report (buffer-start buffer))
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(buffer-not-modified! buffer)))))
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(for-each (lambda (item)
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(let ((window (car item))
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(point (cadr item))
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(start (cddr item)))
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(set-window-point! window point)
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(set-window-start-mark! window start 0)))
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saved-windows)
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(if saved-mark (set-buffer-mark! buffer saved-mark))))
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