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WebSVN – planix.SVN – Blame – /os/branches/feature_unix/sys/src/libdraw/scroll.c – Rev 2

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