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Add an "else" clause to _followrel.

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This should be in 2.2.
This commit is contained in:
John Fieber 1997-01-08 01:40:52 +00:00
parent 22d0d81b71
commit 945a701173
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=21412
2 changed files with 14 additions and 6 deletions
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6
usr.bin/sgmls/instant/transpec.5
View File

@ -311,7 +311,7 @@ l l.
\fB_filename\fP@filename of notation
\fB_find\fP \fIrel\fP \fIgi\fP \fIspec-id\fP@find gi based on relationship
\fB_followlink\fP [\fIattname\fP] \fIspec-id\fP@follow IDREFs [attname] and use spec-id
\fB_followrel\fP \fIrel\fP \fIgi\fP \fIspec-id\fP@do spec-id on rel if it matches
\fB_followrel\fP \fIrel\fP \fIgi\fP \fIspec-id\fP [\fIspec-id\fP]@do spec-id on rel if it matches
\fB_gi\fP [\fBM|L|U\fP]@return GI name; M, L, U case
\fB_id\fP \fIid [\fP\fIspec-id\fP]@find element with ID and use spec-id
\fB_include\fP \fIfilename\fP@insert file here
@ -383,9 +383,11 @@ It will then apply the transpec specified by \fIspec-id\fP to that element.
If specified, it will follow the link pointed to by \fIattname\fP.
By default, \fBinstant\fP assumes the attributes named \fBLINKEND\fP and \fBLINKENDS\fP are if type IDREF or IDREFS.
You can change this by setting the variable \fBlink_atts\fP to a space-separated list of attribute names.
.IP "\fB_followrel\fP \fIrelationship\fP \fIgi\fP \fIspec-id\fP"
.IP "\fB_followrel\fP \fIrelationship\fP \fIgi\fP \fIspec-id\fP [\fIspec-id2\fP]"
If the \fIgi\fP has the specified \fIrelationship\fP to the current element,
perform the action specified by \fIspec-id\fP on the related element.
If the \fIrelationship\fP to \fIgi\fP does not exist,
and \fIspec-id2\fP is present, perform \fIspec-id2\fP on the current element.
See the discussion of the criteria field \fBRelation\fP for acceptable relationship names.
.IP "\fB_gi\fP [\fBM|L|U\fP]"
Print the name of the current GI to the output stream.

12
usr.bin/sgmls/instant/tranvar.c
View File

@ -373,10 +373,16 @@ ExpandSpecialVar(
}
/* Do action on followed element if element has [relationship] with gi.
* Format: _followrel relationship gi action */
* If [relationship] is not met, do alternate action on this element.
* Format: _followrel relationship gi action [action] */
else if (StrEq(tok[0], "followrel")) {
if (ntok >= 4)
(void)CheckRelation(e, tok[1], tok[2], tok[3], fp, RA_Related);
if (ntok >= 4) {
if (!CheckRelation(e, tok[1], tok[2], tok[3], fp, RA_Related)) {
/* action not done, see if an alt action specified */
if (ntok >= 5)
TranTByAction(e, tok[4], fp);
}
}
}
/* Find element with matching ID and do action. If action not specified,