/**
* Concatenates a PDF document selecting the pages to keep. The pages are described as
* ranges. The page ordering can be changed but
* no page repetitions are allowed.
* @param reader the PDF document
* @param ranges the comma separated ranges as described in {@link SequenceList}
* @throws DocumentException on error
*/
public void AddDocument(PdfReader reader, String ranges)
{
fc.AddDocument(reader, SequenceList.Expand(ranges, reader.NumberOfPages));
}
/**
* Generates a list of numbers from a string.
* @param ranges the comma separated ranges
* @param maxNumber the maximum number in the range
* @return a list with the numbers as <CODE>Integer</CODE>
*/
public static ArrayList Expand(String ranges, int maxNumber)
{
SequenceList parse = new SequenceList(ranges);
ArrayList list = new ArrayList();
bool sair = false;
while (!sair)
{
sair = parse.GetAttributes();
if (parse.low == -1 && parse.high == -1 && !parse.even && !parse.odd)
{
continue;
}
if (parse.low < 1)
{
parse.low = 1;
}
if (parse.high < 1 || parse.high > maxNumber)
{
parse.high = maxNumber;
}
if (parse.low > maxNumber)
{
parse.low = maxNumber;
}
//System.out.Println("low="+parse.low+",high="+parse.high+",odd="+parse.odd+",even="+parse.even+",inverse="+parse.inverse);
int inc = 1;
if (parse.inverse)
{
if (parse.low > parse.high)
{
int t = parse.low;
parse.low = parse.high;
parse.high = t;
}
for (ListIterator it = new ListIterator(list); it.HasNext();)
{
int n = (int)it.Next();
if (parse.even && (n & 1) == 1)
{
continue;
}
if (parse.odd && (n & 1) == 0)
{
continue;
}
if (n >= parse.low && n <= parse.high)
{
it.Remove();
}
}
}
else
{
if (parse.low > parse.high)
{
inc = -1;
if (parse.odd || parse.even)
{
--inc;
if (parse.even)
{
parse.low &= ~1;
}
else
{
parse.low -= ((parse.low & 1) == 1 ? 0 : 1);
}
}
for (int k = parse.low; k >= parse.high; k += inc)
{
list.Add(k);
}
}
else
{
if (parse.odd || parse.even)
{
++inc;
if (parse.odd)
{
parse.low |= 1;
}
else
{
parse.low += ((parse.low & 1) == 1 ? 1 : 0);
}
}
for (int k = parse.low; k <= parse.high; k += inc)
{
list.Add(k);
}
}
}
}
return(list);
}
