97 lines
3.2 KiB
Scheme
97 lines
3.2 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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;;;; Display-Type Abstraction
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;;; package: (edwin display-type)
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(define-structure (display-type
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(conc-name display-type/)
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(constructor %make-display-type)
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(print-procedure
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(standard-print-method 'DISPLAY-TYPE
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(lambda (display-type)
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(list (display-type/name display-type))))))
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(name false read-only true)
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(multiple-screens? false read-only true)
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(operation/available? false read-only true)
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(operation/make-screen false read-only true)
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(operation/get-input-operations false read-only true)
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(operation/with-display-grabbed false read-only true)
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(operation/with-interrupts-enabled false read-only true)
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(operation/with-interrupts-disabled false read-only true))
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(define (make-display-type name
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multiple-screens?
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available?
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make-screen
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get-input-operations
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with-display-grabbed
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with-interrupts-enabled
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with-interrupts-disabled)
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(let ((display-type
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(%make-display-type name
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multiple-screens?
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available?
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make-screen
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get-input-operations
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with-display-grabbed
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with-interrupts-enabled
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with-interrupts-disabled)))
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(set! display-types (cons display-type display-types))
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display-type))
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(define display-types '())
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(define (display-type/available? display-type)
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((display-type/operation/available? display-type)))
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(define (display-type/make-screen display-type args)
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(apply (display-type/operation/make-screen display-type) args))
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(define (display-type/get-input-operations display-type screen)
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((display-type/operation/get-input-operations display-type) screen))
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(define (display-type/with-display-grabbed display-type thunk)
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((display-type/operation/with-display-grabbed display-type) thunk))
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(define (display-type/with-interrupts-enabled display-type thunk)
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((display-type/operation/with-interrupts-enabled display-type) thunk))
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(define (display-type/with-interrupts-disabled display-type thunk)
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((display-type/operation/with-interrupts-disabled display-type) thunk))
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(define (editor-display-types)
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(filter display-type/available? display-types))
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(define (name->display-type name)
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(let ((display-type
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(find (lambda (display-type)
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(eq? name (display-type/name display-type)))
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display-types)))
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display-type))
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