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#include "a.h"
/*
* 5. Vertical spacing.
*/
/* set vertical baseline spacing */
void
vs(int v)
{
if(v == 0)
v = getnr(L(".v0"));
nr(L(".v0"), getnr(L(".v")));
nr(L(".v"), v);
}
void
r_vs(int argc, Rune **argv)
{
if(argc < 2)
vs(eval(L("12p")));
else if(argv[1][0] == '+')
vs(getnr(L(".v"))+evalscale(argv[1]+1, 'p'));
else if(argv[1][0] == '-')
vs(getnr(L(".v"))-evalscale(argv[1]+1, 'p'));
else
vs(evalscale(argv[1], 'p'));
}
/* set line spacing */
void
ls(int v)
{
if(v == 0)
v = getnr(L(".ls0"));
nr(L(".ls0"), getnr(L(".ls")));
nr(L(".ls"), v);
}
void
r_ls(int argc, Rune **argv)
{
ls(argc < 2 ? 0 : eval(argv[1]));
}
/* .sp - space vertically */
/* .sv - save a contiguous vertical block */
void
sp(int v)
{
Rune buf[100];
double fv;
br();
fv = v * 1.0/UPI;
if(fv > 5)
fv = eval(L("1v")) * 1.0/UPI;
runesnprint(buf, nelem(buf), "<p style=\"margin-top: 0; margin-bottom: %.2fin\"></p>\n", fv);
outhtml(buf);
}
void
r_sp(int argc, Rune **argv)
{
if(getnr(L(".ns")))
return;
if(argc < 2)
sp(eval(L("1v")));
else{
if(argv[1][0] == '|'){
/* XXX if there's no output yet, do the absolute! */
if(verbose)
warn("ignoring absolute .sp %d", eval(argv[1]+1));
return;
}
sp(evalscale(argv[1], 'v'));
}
}
void
r_ns(int argc, Rune **argv)
{
USED(argc);
USED(argv);
nr(L(".ns"), 1);
}
void
r_rs(int argc, Rune **argv)
{
USED(argc);
USED(argv);
nr(L(".ns"), 0);
}
void
t5init(void)
{
addreq(L("vs"), r_vs, -1);
addreq(L("ls"), r_ls, -1);
addreq(L("sp"), r_sp, -1);
addreq(L("sv"), r_sp, -1);
addreq(L("os"), r_nop, -1);
addreq(L("ns"), r_ns, 0);
addreq(L("rs"), r_rs, 0);
nr(L(".v"), eval(L("12p")));
nr(L(".v0"), eval(L("12p")));
nr(L(".ls"), 1);
nr(L(".ls0"), 1);
}
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