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BB-H138E-BM
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6-1-sources/scrinit.bli
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%TITLE 'SCRINIT - initialize for screen mode'
MODULE SCRINIT ( ! Initialize for screen mode
IDENT = '3-001' ! File: SCRINIT.BLI Edit: GB3001
) =
BEGIN
!
! COPYRIGHT (c) 1981, 1985 BY
! DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
! ALL RIGHTS RESERVED.
!
! THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
! ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
! INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
! COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
! OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
! TRANSFERRED.
!
! THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
! AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
! CORPORATION.
!
! DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
! SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
!
!++
! FACILITY: EDT -- The DEC Standard Editor
!
! ABSTRACT:
!
! This module initializes the screen for change mode editingr
!
! ENVIRONMENT: Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: September 8, 1979
!
! MODIFIED BY:
!
! 1-001 - Original. DJS 12-Feb-1981. This module was created by
! extracting the routine EDT$$SC_INIT from module SCREEN.
! 1-002 - Regularize headers. JBS 13-Mar-1981
! 1-003 - Initialize for NOKEYPAD mode also. SMB 1-Mar-1982
! 1-004 - Don't turn off autowrap. JBS 02-Apr-1982
! 1-005 - Make sure we are in G0. JBS 26-May-1982
! 1-006 - Remove edit 1-005. Always sending an SI means we are
! sending a control O. EDT's automatic test procedures
! cannot handle control O's. JBS
! 1-007 - Send "exit hold-screen mode" to a VT52. JBS 30-Aug-1982
! 1-008 - New screen update logic. JBS 13-Sep-1982
! 1-009 - Do more initialization of screen update globals. SMB 20-Sep-1982
! 1-010 - Set up an EOB screen pointer. SMB 05-Oct-1982
! 1-011 - Remove an unreferenced external declaration. JBS 09-Oct-1982
! 1-012 - Force the cursor to the upper left corner. JBS 15-Oct-1982
! 1-013 - Fix the way memory is added to the free list. SMB 17-Oct-1982
! 1-014 - Don't fool with the screen data base. JBS 29-Oct-1982
! 1-015 - Make sure the scrolling region is really set. JBS 18-Jan-1983
! 1-016 - Force a cursor positioning sequence to "home". SMB 14-Feb-1983
! 1-017 - Do miscellaneous setups first, to be sure terminal will respond
! correctly to subsequent setups. JBS 23-Feb-1983
! 1-018 - Set the width also, in case this is a VT100. JBS 24-Feb-1983
! 3-001 - Add updates from V3 sources. GB 03-May-1983
!--
%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!
REQUIRE 'EDTSRC:TRAROUNAM';
FORWARD ROUTINE
EDT$$SC_INIT : NOVALUE;
!
! INCLUDE FILES:
!
REQUIRE 'EDTSRC:EDTREQ';
!
! MACROS:
!
!+
! The following macros specify the strings used to initialize the terminals. After this
! initialization more characters are sent to the terminal to complete putting it in the
! state that EDT expects.
!-
!<BLF/NOFORMAT>
MACRO
KEYPAD_MODE_STRING = %STRING (%CHAR (ASC_K_ESC), '=') %, ! Application keypad mode
NOKEYPAD_MODE_STRING = %STRING (%CHAR (ASC_K_ESC), '>') %, ! Numeric keypad mode
VT100_SETUP_STRING = %STRING ( ! VT100 initialization
%CHAR (ASC_K_ESC), '\', ! String terminator, in case we are in a REGIS string
%CHAR (ASC_K_ESC), '<', ! ANSI mode (in case we are in VT52 mode)
%CHAR (ASC_K_ESC), '[?6l', ! origin mode off
%CHAR (ASC_K_ESC), '[m', ! video attributes off
%CHAR (ASC_K_ESC), ')0' ! select special graphics for G1 (leave G0 as set up by user)
) %,
VT52_SETUP_STRING = %STRING ( ! VT52 initialization
%CHAR (ASC_K_ESC), '\' ! Exit hold-screen mode
) %;
!<BLF/FORMAT>
!
! EQUATED SYMBOLS:
!
BIND
KEYPAD_MODE = UPLIT (KEYPAD_MODE_STRING),
NOKEYPAD_MODE = UPLIT (NOKEYPAD_MODE_STRING),
VT100_SETUP = UPLIT (VT100_SETUP_STRING),
VT52_SETUP = UPLIT (VT52_SETUP_STRING);
LITERAL
KEYPAD_MODE_LEN = %CHARCOUNT (KEYPAD_MODE_STRING),
NOKEYPAD_MODE_LEN = %CHARCOUNT (NOKEYPAD_MODE_STRING),
VT100_SETUP_LEN = %CHARCOUNT (VT100_SETUP_STRING),
VT52_SETUP_LEN = %CHARCOUNT (VT52_SETUP_STRING);
!
! OWN STORAGE:
!
! NONE
!
! EXTERNAL REFERENCES:
!
! In the routine
%SBTTL 'EDT$$SC_INIT - initialize for screen mode'
GLOBAL ROUTINE EDT$$SC_INIT ! Initialize for screen mode
: NOVALUE =
!++
! FUNCTIONAL DESCRIPTION:
!
! Initialize for screen mode. The scrolling region is set up for VT100's,
! [no]keypad mode is set, and the globals pointing to the screen information
! structure are initialized to zero.
!
! FORMAL PARAMETERS:
!
! NONE
!
! IMPLICIT INPUTS:
!
! SCR_LNS
! REVID
! KPAD
! TI_TYP
! TI_WID
!
! IMPLICIT OUTPUTS:
!
! REVID
! TOP_SCREG
!
! ROUTINE VALUE:
!
! NONE
!
! SIDE EFFECTS:
!
! NONE
!
!--
BEGIN
EXTERNAL ROUTINE
EDT$$SC_POSABS, ! Position the cursor
EDT$$SC_SETSCLLREG, ! Set the scrolling region
EDT$$FMT_LIT : NOVALUE, ! Output a string without interpretation
EDT$$TI_ENTERCHM : NOVALUE, ! Set up terminal for change mode
EDT$$SC_SETWID; ! Set the width on a VT100
EXTERNAL
SCR_LNS, ! Number of screen lines
KPAD, ! Keypad activated?
TI_TYP, ! Terminal type.
REVID, ! 1 = screen is in reverse video
TOP_SCREG, ! Top of the scrolling region
TI_WID; ! Terminal width
!+
! Inform the terminal I/O routines we are entering screen mode
! and set the scrolling region to text area.
!-
EDT$$TI_ENTERCHM ();
!+
! Set the terminal's parameters properly for EDT.
!-
IF (.TI_TYP EQL TERM_VT100)
THEN
EDT$$FMT_LIT (CH$PTR (VT100_SETUP), VT100_SETUP_LEN)
ELSE
EDT$$FMT_LIT (CH$PTR (VT52_SETUP), VT52_SETUP_LEN);
!+
! Set the terminal's width if it is a VT100.
!-
EDT$$SC_SETWID (.TI_WID);
!+
! Set the scrolling region the way EDT wants it.
!-
TOP_SCREG = 1; ! Make sure control sequence is issued
EDT$$SC_SETSCLLREG (0, .SCR_LNS);
!+
! Force a cursor positioning sequence to "home". This may already have
! been done for some terminals when the scrolling region or width was set.
!-
EDT$$SC_POSABS (0, 0);
!+
! Either activate or deactivate the keypad.
!-
IF (.KPAD) !
THEN
EDT$$FMT_LIT (CH$PTR (KEYPAD_MODE), KEYPAD_MODE_LEN)
ELSE
EDT$$FMT_LIT (CH$PTR (NOKEYPAD_MODE), NOKEYPAD_MODE_LEN);
REVID = 0; ! The terminal is not in reverse video
END; ! of routine EDT$$SC_INIT
!<BLF/PAGE
END ! of module EDT$SCRINIT
ELUDOM