Review

13

com/itextpdf/text/pdf/PdfPages.java

writePageTree()

class PdfPages {
    // returns the top parent to include in the catalog
    PdfIndirectReference writePageTree() throws IOException {
        if (pages.isEmpty())
            throw new IOException(MessageLocalization.getComposedMessage("the.document.has.no.pages"));
        int leaf = 1;
        ArrayList<PdfIndirectReference> tParents = parents;
        ArrayList<PdfIndirectReference> tPages = pages;
        ArrayList<PdfIndirectReference> nextParents = new ArrayList<PdfIndirectReference>();
        while (true) {
            leaf *= leafSize;
            int stdCount = leafSize;
            int rightCount = tPages.size() % leafSize;
            if (rightCount == 0)
                rightCount = leafSize;
            for (int p = 0; p < tParents.size(); ++p) {
                int count;
                int thisLeaf = leaf;
                if (p == tParents.size() - 1) {
                    count = rightCount;
                    thisLeaf = pages.size() % leaf;
                    if (thisLeaf == 0)
                        thisLeaf = leaf;
                }
                else
                    count = stdCount;
                PdfDictionary top = new PdfDictionary(PdfName.PAGES);
                top.put(PdfName.COUNT, new PdfNumber(thisLeaf));
                PdfArray kids = new PdfArray();
                ArrayList<PdfObject> internal = kids.getArrayList();
                internal.addAll(tPages.subList(p * stdCount, p * stdCount + count));
                top.put(PdfName.KIDS, kids);
                if (tParents.size() > 1) {
                    if (p % leafSize == 0)
                        nextParents.add(writer.getPdfIndirectReference());
                    top.put(PdfName.PARENT, nextParents.get(p / leafSize));
                }
                else {
                	top.put(PdfName.ITXT, new PdfString(Document.getRelease()));
                }
                writer.addToBody(top, tParents.get(p));
            }
            if (tParents.size() == 1) {
                topParent = tParents.get(0);
                return topParent;
            }
            tPages = tParents;
            tParents = nextParents;
            nextParents = new ArrayList<PdfIndirectReference>();
        }
    }

}