* mdocml: Implement a long-standing desideratum, hanging indentation for
@ 2013-12-23 2:20 schwarze
0 siblings, 0 replies; only message in thread
From: schwarze @ 2013-12-23 2:20 UTC (permalink / raw)
To: source
Log Message:
-----------
Implement a long-standing desideratum,
hanging indentation for .Fn in SYNOPSIS mode,
exploiting the new trailspace feature
by deliberately *NOT* using it.
Modified Files:
--------------
mdocml:
term.c
mdoc_term.c
Revision Data
-------------
Index: term.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/term.c,v
retrieving revision 1.211
retrieving revision 1.212
diff -Lterm.c -Lterm.c -u -p -r1.211 -r1.212
--- term.c
+++ term.c
@@ -120,7 +120,12 @@ term_flushln(struct termp *p)
* First, establish the maximum columns of "visible" content.
* This is usually the difference between the right-margin and
* an indentation, but can be, for tagged lists or columns, a
- * small set of values.
+ * small set of values.
+ *
+ * The following unsigned-signed subtractions look strange,
+ * but they are actually correct. If the int p->overstep
+ * is negative, it gets sign extended. Subtracting that
+ * very large size_t effectively adds a small number to dv.
*/
assert (p->rmargin >= p->offset);
dv = p->rmargin - p->offset;
@@ -199,7 +204,11 @@ term_flushln(struct termp *p)
if (0 < ntab)
vbl += ntab * p->tabwidth;
- /* Remove the p->overstep width. */
+ /*
+ * Remove the p->overstep width.
+ * Again, if p->overstep is negative,
+ * sign extension does the right thing.
+ */
bp += (size_t)p->overstep;
p->overstep = 0;
@@ -275,8 +284,10 @@ term_flushln(struct termp *p)
* If we have overstepped the margin, temporarily move
* it to the right and flag the rest of the line to be
* shorter.
+ * If there is a request to keep the columns together,
+ * allow negative overstep when the column is not full.
*/
- if (p->overstep < 0)
+ if (p->trailspace && p->overstep < 0)
p->overstep = 0;
return;
Index: mdoc_term.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mdoc_term.c,v
retrieving revision 1.250
retrieving revision 1.251
diff -Lmdoc_term.c -Lmdoc_term.c -u -p -r1.250 -r1.251
--- mdoc_term.c
+++ mdoc_term.c
@@ -1538,6 +1538,7 @@ termp_ft_pre(DECL_ARGS)
static int
termp_fn_pre(DECL_ARGS)
{
+ size_t width, rmargin = 0;
int pretty;
pretty = MDOC_SYNPRETTY & n->flags;
@@ -1547,11 +1548,25 @@ termp_fn_pre(DECL_ARGS)
if (NULL == (n = n->child))
return(0);
+ if (pretty) {
+ width = term_len(p, 4);
+ rmargin = p->rmargin;
+ p->rmargin = p->offset + width;
+ p->flags |= TERMP_NOBREAK | TERMP_HANG;
+ }
+
assert(MDOC_TEXT == n->type);
term_fontpush(p, TERMFONT_BOLD);
term_word(p, n->string);
term_fontpop(p);
+ if (pretty) {
+ term_flushln(p);
+ p->flags &= ~(TERMP_NOBREAK | TERMP_HANG);
+ p->offset = p->rmargin;
+ p->rmargin = rmargin;
+ }
+
p->flags |= TERMP_NOSPACE;
term_word(p, "(");
p->flags |= TERMP_NOSPACE;
@@ -1574,6 +1589,7 @@ termp_fn_pre(DECL_ARGS)
if (pretty) {
p->flags |= TERMP_NOSPACE;
term_word(p, ";");
+ term_flushln(p);
}
return(0);
--
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