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BB-AE97C-BM
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sources/keyfmtstr.bli
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%TITLE 'KEYFMTSTR - translate a key string'
MODULE KEYFMTSTR ( ! Translate a key string
IDENT = '3-003' ! File: KEYFMTSTR.BLI Edit: CJG3003
) =
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:
!
! Translate a key string.
!
! ENVIRONMENT: Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: April 7, 1979
!
! MODIFIED BY:
!
! 1-001 - Original. DJS 24-Feb-1981. This module was created by
! extracting routine COM_STRING from module KEYTRAN.
!
! 1-002. DJS 26-Feb-1981. Handling of prompt following ? in a key
! definition modified to allow double quotes as well as single
! quotes to enclose a prompt string.
! 1-003 - Regularize headers. JBS 09-Mar-1981
! 1-004 - Build in T_ADV, T_BACK and T_RESET. JBS 31-Mar-1981
! 1-005 - Add return value for end of journal file. JBS 02-Oct-1981
! 1-006 - Add an additional terminator when prompt is ?*. STS 21-Oct-1981
! 1-007 - If terminator of search string begins with adv or back then insert
! this and throw away rest of key definition. STS 16-Nov-1981
! 1-008 - Revise the call to turn on autorepeat. JBS 30-Jan-1982
! 1-009 - Remove an unused external reference. JBS 09-Jun-1982
! 1-010 - Modify message output. SMB 30-Jun-1982
! 1-011 - Add resetting search string and sett direction forward to RESET.
! STS 02-Jul-1982
! 1-012 - Only erase the last line on a reset. SMB 15-Jul-1982
! 1-013 - Change the string match call. JBS 19-Jul-1982
! 1-014 - Catch errors in prompt string. STS 03-Aug-1982
! 1-015 - Position cursor after error message. STS 10-Aug-1982
! 1-016 - New implementation of defined keys. JBS 13-Aug-1982
! 1-017 - Fix a bug in recognizing ADV and BACK. JBS 16-Aug-1982
! 1-018 - Make RESET not reset the search string. JBS for STS 26-Aug-1982
! 1-019 - New screen update logic. JBS 13-Sep-1982
! 1-020 - Remove external declaration of EDT$$FMT_LIT, not used. JBS 05-Oct-1982
! 1-021 - Change the cursor positioning call, to obsolete a module. JBS 05-Oct-1982
! 1-022 - Use partial matching for ADV and BACK. JBS 14-Dec-1982
! 1-023 - Insert the whole text of a terminator to a prompt, if it starts with
! ADV or BACK. This is for compatibility with EDT version 2. JBS 15-Dec-1982
! 1-024 - Don't position cursor if no position recorded, and treat a cancelled command the same
! as an undefined key. JBS 17-Jan-1983
! 1-025 - Put WPS support under a conditional. JBS 10-Feb-1983
! 3-001 - Add updates from V3 source kit. GB 27-Apr-1983
! 3-002 - Add PROMPT_LENGTH so errors point to right place. CJG 7-Oct-1983
! 3-003 - Call EDT$$TI_RDCMDLN directly. CJG 3-Jan-1983
!--
%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!
REQUIRE 'EDTSRC:TRAROUNAM';
FORWARD ROUTINE
EDT$$TRN_KSTR;
!
! INCLUDE FILES:
!
REQUIRE 'EDTSRC:EDTREQ';
LIBRARY 'EDTSRC:KEYPADDEF';
!
! MACROS:
!
! NONE
!
! EQUATED SYMBOLS:
!
! NONE
!
! OWN STORAGE:
!
! NONE
!
! EXTERNAL REFERENCES:
!
! In the routine
%SBTTL 'EDT$$TRN_KSTR - translate a key string'
GLOBAL ROUTINE EDT$$TRN_KSTR ( ! Translate a key string
K, ! Key number
EXPAND, ! 1 = do prompting
ECHO ! 1 = echo characters
) =
!++
! FUNCTIONAL DESCRIPTION:
!
! This routine processes the translation string of a key placing the
! characters in the buffer. If a '?' is seen, and the EXPAND parameter
! is 1, then the user is prompted for input which replaces the '?' and
! the prompt string in the buffer.
!
! FORMAL PARAMETERS:
!
! K The number of the key to translate.
!
! EXPAND Flag indicating ? should be expanded.
!
! ECHO Flag indicating that the characters should be echoed.
!
! IMPLICIT INPUTS:
!
! MESSAGE_LINE
! CS_LNO
! CUR_COL
! SEL_BUF
! CMD_BUF
! CUR_BUF
! TI_TYP
! TIN_ECHOPOS
!
! IMPLICIT OUTPUTS:
!
! CMD_PTR
! CMD_END
! TIN_ECHOPOS
! TIN_ECHOFLG
! PROMPT_LENGTH
!
! ROUTINE VALUE:
!
! 0 = definition did not end with a period
! 1 = key was null or translation was successful and definition ended with period
! or translation was cancelled
! 2 = end of journal file
!
! SIDE EFFECTS:
!
! This routine calls itself recursively when an input string is terminated
! by ADV or BACK.
!
!--
BEGIN
EXTERNAL ROUTINE
EDT$$SC_ERATOEOL,
EDT$$MSG_BELL,
EDT$$OUT_MSG,
EDT$$SC_REVID,
EDT$$SC_NONREVID,
EDT$$OUT_FMTBUF,
EDT$$TI_RDCMDLN,
EDT$$PUT_CMDCH : NOVALUE, ! Put a character in the command buffer
EDT$$SC_POSCSIF : NOVALUE,
EDT$$TI_ENBLAUTREP, ! Enable or disable autorepeat
EDT$$TI_INPCH,
EDT$$TI_DELK,
EDT$$TST_KEYDEF, ! See if a key is defined as aparticular string
EDT$$FIND_KEY; ! Find the definition of a key
EXTERNAL
MESSAGE_LINE, ! Message line is this + 1
CS_LNO, ! Line on which the cursor is positioned
CUR_COL, ! Column on which the cursor is positioned.
SEL_BUF, ! Buffer in which the mark resides
CMD_BUF, ! Command buffer
CMD_PTR, ! Pointer to next char in command buffer
CMD_END, ! Pointer to end of info in command buffer
CUR_BUF, ! Pointer to current text buffer TBCB
PROMPT_LENGTH, ! Length of prompt issued
TI_TYP, ! terminal type
TIN_ECHOFLG, ! Was a character echoed?
TIN_ECHOPOS, ! The position on the echo line.
DIR_MOD, ! the current direction
DFLT_VERB, ! the current default mode
SEA_STRLEN; ! length of the current search string
MESSAGES ((INVSUBCOM));
LOCAL
C,
TERM,
ALT_TERM,
TRAN_POINT,
TRAN_END,
KEY_PTR : REF BLOCK [] FIELD (KEY_DEF_FIELD);
!+
! Check for a key that is null.
!-
IF ( NOT EDT$$FIND_KEY (.K, KEY_PTR))
THEN
BEGIN
CMD_END = .CMD_PTR;
RETURN (1);
END;
!+
! Look for the string RESET, which is handled specially.
!-
IF EDT$$TST_KEYDEF (.K, UPLIT ('RESET'), 5, 0)
THEN
BEGIN
!+
! Reset was seen. Flush the buffer, and undo the select range.
!-
CMD_PTR = CH$PTR (CMD_BUF,, BYTE_SIZE);
CMD_END = CH$PTR (CMD_BUF,, BYTE_SIZE);
IF (.ECHO)
THEN
BEGIN
EDT$$SC_POSCSIF (.MESSAGE_LINE + 1, 0); ! Erase key definition
EDT$$SC_ERATOEOL ();
EDT$$OUT_FMTBUF ();
END;
DFLT_VERB = VERB_K_MOVE; ! reset mode to move
DIR_MOD = DIR_FORWARD; ! reset direction to forward
SEL_BUF = 0;
RETURN (1);
END;
!+
! Get a pointer to the end of the translation string.
!-
TRAN_POINT = CH$PTR (KEY_PTR [KEY_DEF_TEXT],, BYTE_SIZE);
TRAN_END = CH$PLUS (.TRAN_POINT, .KEY_PTR [KEY_DEF_LEN]);
TERM = 0;
!+
! Loop through the string.
!-
WHILE CH$PTR_LSS (.TRAN_POINT, .TRAN_END) DO
IF ((CH$RCHAR (.TRAN_POINT) EQL %C'?') AND .EXPAND)
THEN
!+
! Character is ? and expand is on.
!-
BEGIN
LOCAL
QUOTE, ! Character following ?
P_ADDR, ! Address of prompt.
STATUS, ! for status of kpad_inp routine
P_LEN; ! Length of prompt.
TRAN_POINT = CH$PLUS (.TRAN_POINT, 1);
!+
! Look for a second ?, in which case it is literal.
!-
IF (CH$RCHAR (.TRAN_POINT) EQL %C'?')
THEN
EDT$$PUT_CMDCH (CH$RCHAR_A (TRAN_POINT), .ECHO)
ELSE
!+
! Expand the ?.
!-
BEGIN
P_LEN = 0;
!+
! See if it's the special prompt which takes a CR.
!-
IF (CH$RCHAR (.TRAN_POINT) EQL %C'*')
THEN
BEGIN
TRAN_POINT = CH$PLUS (.TRAN_POINT, 1); ! point to the next char
ALT_TERM = ASC_K_CR; ! set up an alternative terminator of CR
END
ELSE
ALT_TERM = ASC_K_ESC; ! otherwise we just stop at escapes
!+
! Look for a quote mark following to start the prompt.
!-
QUOTE = CH$RCHAR (.TRAN_POINT);
IF ((.QUOTE EQL %C'''') OR (.QUOTE EQL %C'"'))
THEN
BEGIN
!+
! Get the entire prompt string.
!-
TRAN_POINT = CH$PLUS (.TRAN_POINT, 1);
P_ADDR = .TRAN_POINT;
WHILE (CH$PTR_GTR (.TRAN_END, .TRAN_POINT) AND (CH$RCHAR_A (TRAN_POINT) NEQ .QUOTE)) DO
P_LEN = .P_LEN + 1;
END
ELSE
BEGIN
CMD_PTR = CH$PTR (CMD_BUF,, BYTE_SIZE);
EDT$$MSG_BELL (EDT$_INVSUBCOM);
IF (.CS_LNO GEQ 0) THEN EDT$$SC_POSCSIF (.CS_LNO, .CUR_COL);
RETURN (0);
END;
!+
! Position the cursor and put out the prompt.
!-
EDT$$OUT_MSG (.MESSAGE_LINE, 0, .P_ADDR, .P_LEN);
EDT$$TI_ENBLAUTREP (1);
PROMPT_LENGTH = .P_LEN - 1;
TIN_ECHOPOS = .TIN_ECHOPOS + .P_LEN;
TIN_ECHOFLG = 1;
!+
! Now, read up to the next escape character.
!-
IF (EDT$$TI_INPCH (C) EQL 0) THEN RETURN (2);
STATUS = EDT$$TI_RDCMDLN (.C, .CMD_PTR, CMD_PTR, .ALT_TERM, TERM);
IF (.STATUS EQL 2) THEN RETURN (2);
IF (.STATUS EQL 0)
THEN
!+
! Command was canceled, flush the buffer and return 1.
!-
BEGIN
EDT$$SC_NONREVID ();
IF (.CS_LNO GEQ 0) THEN EDT$$SC_POSCSIF (.CS_LNO, .CUR_COL);
CMD_PTR = CH$PTR (CMD_BUF,, BYTE_SIZE);
CMD_END = CH$PTR (CMD_BUF,, BYTE_SIZE);
RETURN (1);
END;
!+
! Do a positioning sequence to left column so that we know
! the command has been seen.
!-
EDT$$SC_POSCSIF (.MESSAGE_LINE, 0);
EDT$$OUT_FMTBUF ();
END
END
ELSE
EDT$$PUT_CMDCH (CH$RCHAR_A (TRAN_POINT), .ECHO);
!+
! If the translation ended with a period, then remove it from the
! buffer and return a one, otherwise, return a 0.
!-
IF (CH$RCHAR (CH$PLUS (.CMD_PTR, -1)) EQL %C'.')
THEN
BEGIN
CMD_PTR = CH$PLUS (.CMD_PTR, -1);
IF .ECHO THEN EDT$$TI_DELK (CH$RCHAR (.CMD_PTR));
!+
! If the terminator of input was advance or backup, then throw it into the buffer
! so we can implement the KED feature of hitting advance or backup after a search
! string. For compatibility with EDT version 2, any key whose definition starts
! with ADV is considered an advance key, and any key whose definition starts with
! BACK is considered a backup key. The entire text of the definition is inserted.
!-
IF (EDT$$TST_KEYDEF (.TERM, UPLIT ('ADV'), 3, 1) OR !
EDT$$TST_KEYDEF (.TERM, UPLIT ('BACK'), 4, 1))
THEN
EDT$$TRN_KSTR (.TERM, .EXPAND, .ECHO);
CMD_END = .CMD_PTR;
RETURN (1);
END;
RETURN (0);
END; ! of routine EDT$$TRN_KSTR
!<BLF/PAGE>
END ! of module EDT$KEYFMTSTR
ELUDOM