2021-04-26 07:53:20 -04:00
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#| -*-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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;;;; Buffer Set Abstraction
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2021-04-26 07:57:47 -04:00
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2021-04-26 07:53:20 -04:00
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(define-structure (bufferset (constructor %make-bufferset))
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buffer-list
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(names #f read-only #t))
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(define (make-bufferset initial-buffer)
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(%make-bufferset (list initial-buffer)
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(let ((names (make-string-table 16 false)))
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(string-table-put! names
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(buffer-name initial-buffer)
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initial-buffer)
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names)))
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(define (bufferset-select-buffer! bufferset buffer)
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(if (memq buffer (bufferset-buffer-list bufferset))
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(set-bufferset-buffer-list!
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bufferset
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(cons buffer (delq! buffer (bufferset-buffer-list bufferset)))))
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unspecific)
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(define (bufferset-bury-buffer! bufferset buffer)
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(if (memq buffer (bufferset-buffer-list bufferset))
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(set-bufferset-buffer-list!
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bufferset
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(append! (delq! buffer (bufferset-buffer-list bufferset))
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(list buffer))))
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unspecific)
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(define (bufferset-guarantee-buffer! bufferset buffer)
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(if (not (memq buffer (bufferset-buffer-list bufferset)))
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(begin
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(string-table-put! (bufferset-names bufferset)
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(buffer-name buffer)
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buffer)
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(set-bufferset-buffer-list! bufferset
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(append! (bufferset-buffer-list bufferset)
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(list buffer)))))
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unspecific)
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(define (bufferset-find-buffer bufferset name)
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(string-table-get (bufferset-names bufferset) name))
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(define (bufferset-create-buffer bufferset name)
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(if (bufferset-find-buffer bufferset name)
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(error "Attempt to re-create buffer" name))
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(let ((buffer
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(make-buffer name
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(ref-variable editor-default-mode)
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(if within-editor?
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(buffer-default-directory (current-buffer))
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(working-directory-pathname)))))
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(string-table-put! (bufferset-names bufferset) name buffer)
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(set-bufferset-buffer-list!
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bufferset
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(append! (bufferset-buffer-list bufferset) (list buffer)))
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buffer))
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(define (bufferset-find-or-create-buffer bufferset name)
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(or (bufferset-find-buffer bufferset name)
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(bufferset-create-buffer bufferset name)))
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(define (bufferset-kill-buffer! bufferset buffer)
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(if (not (memq buffer (bufferset-buffer-list bufferset)))
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(error "Attempt to kill unknown buffer" buffer))
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(set-bufferset-buffer-list! bufferset
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(delq! buffer (bufferset-buffer-list bufferset)))
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(string-table-remove! (bufferset-names bufferset) (buffer-name buffer)))
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(define (bufferset-rename-buffer bufferset buffer new-name)
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(if (not (memq buffer (bufferset-buffer-list bufferset)))
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(error "Attempt to rename unknown buffer" buffer))
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(if (bufferset-find-buffer bufferset new-name)
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(error "Attempt to rename buffer to existing buffer name" new-name))
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(let ((names (bufferset-names bufferset)))
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(string-table-remove! names (buffer-name buffer))
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(set-buffer-name! buffer new-name)
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2021-04-26 07:57:47 -04:00
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(string-table-put! names new-name buffer)))
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