Enter your search terms Submit search form
	Web pdp-10.trailing-edge.com

 %TITLE 'SCRREV - reverse video screen mode'
MODULE SCRREV (				! Reverse video screen mode
		IDENT = '1-002'			! File: SCRREV.BLI Edit: JBS1002
		) =
BEGIN
!COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION 1981, 1988.  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 THAT IS NOT SUPPLIED BY DIGITAL.
!
!
!++
! FACILITY:	EDT -- The DEC Standard Editor
!
! ABSTRACT:
!
!	This module makes sure the screen is in reverse video.
!
! 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_REVID  from module SCREEN.
! 1-002	- Regularize headers.  JBS 13-Mar-1981
!--

%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$SC_REVID : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!

BIND
    REV_VIDEO = UPLIT (%STRING (%CHAR (ASC_K_ESC), '[7m'));

LITERAL
    REV_VIDEO_LEN = 4;

!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$SC_REVID  - reverse video the screen'

GLOBAL ROUTINE EDT$$SC_REVID 			! Make sure the screen is in reverse video
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine makes sure the screen is in reverse video mode.  Check
!	the flag, and if it is not, output the sequence to set reverse video
!	and set the reverse flag.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	REVID
!	TI_TYP
!
! IMPLICIT OUTPUTS:
!
!	REVID
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$FMT_LIT;

    EXTERNAL
	REVID,				! is reverse video on?
	TI_TYP;				! Terminal type.

    IF (.TI_TYP EQL TERM_VT100)
    THEN

	IF (.REVID EQL 0)
	THEN
	    BEGIN
	    EDT$$FMT_LIT (CH$PTR (REV_VIDEO), REV_VIDEO_LEN);
	    REVID = .REVID + 1;
	    END;

    END;


END
ELUDOM