ref: 11025d6f4a2c3c7e75010f85c2d3108e602270b7
dir: /sys/src/libdraw/scroll.c/
#include <u.h> #include <libc.h> #include <draw.h> int mousescrollsize(int maxlines) { static int lines, pcnt; char *mss; if(lines == 0 && pcnt == 0){ mss = getenv("mousescrollsize"); if(mss){ if(strchr(mss, '%') != nil) pcnt = atof(mss); else lines = atoi(mss); free(mss); } if(lines == 0 && pcnt == 0) lines = 1; if(pcnt>=100) pcnt = 100; } if(lines) return lines; return pcnt * maxlines/100.0; }