ref: 8a4a2dea70aa77475a50968f4c5bd6cdab5d2fb1
dir: /sys/src/cmd/plot/libplot/text.c/
/*
t string Place the string so that its first character is
centered on the current point (default). If
string begins with `\C' (`\R'), it is centered
(right-adjusted) on the current point. A
backslash at the beginning of the string may be
escaped with another backslash.
*/
#include "mplot.h"
void text(char *s){
register int kx, ky;
int centered, right, more;
char *ss;
ss=s;
for(;;){
centered=right=more=0;
if(*ss=='\\'){
ss++;
switch(*ss){
case 'C': centered++; ss++; break;
case 'R': right++; ss++; break;
case 'L': ss++; break;
case 'n': --ss; break;
}
}
for(s=ss;*ss!='\0';ss++)
if(ss[0]=='\\' && ss[1]=='n'){
more++;
break;
}
kx = SCX(e1->copyx);
ky = SCY(e1->copyy);
ky=m_text(kx, ky, s, ss, e1->foregr, centered, right);
if(!more)break;
e1->copyy = ( (double)(ky) - e1->bottom)/e1->scaley + e1->ymin + .5;
move(e1->copyx, e1->copyy);
ss+=2;
}
}