195 lines
8.1 KiB
C#
195 lines
8.1 KiB
C#
using System;
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using System.Collections;
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using System.IO;
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/*
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* $Id: PdfPages.cs,v 1.3 2008/05/13 11:25:21 psoares33 Exp $
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*
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*
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* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is 'iText, a free JAVA-PDF library'.
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*
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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*
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* Contributor(s): all the names of the contributors are added in the source code
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* where applicable.
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* details.
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*
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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*/
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namespace iTextSharp.text.pdf {
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/**
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* <CODE>PdfPages</CODE> is the PDF Pages-object.
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* <P>
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* The Pages of a document are accessible through a tree of nodes known as the Pages tree.
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* This tree defines the ordering of the pages in the document.<BR>
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* This object is described in the 'Portable Document Format Reference Manual version 1.3'
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* section 6.3 (page 71-73)
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*
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* @see PdfPageElement
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* @see PdfPage
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*/
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public class PdfPages {
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private ArrayList pages = new ArrayList();
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private ArrayList parents = new ArrayList();
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private int leafSize = 10;
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private PdfWriter writer;
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private PdfIndirectReference topParent;
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// constructors
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/**
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* Constructs a <CODE>PdfPages</CODE>-object.
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*/
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internal PdfPages(PdfWriter writer) {
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this.writer = writer;
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}
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internal void AddPage(PdfDictionary page) {
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if ((pages.Count % leafSize) == 0)
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parents.Add(writer.PdfIndirectReference);
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PdfIndirectReference parent = (PdfIndirectReference)parents[parents.Count - 1];
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page.Put(PdfName.PARENT, parent);
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PdfIndirectReference current = writer.CurrentPage;
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writer.AddToBody(page, current);
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pages.Add(current);
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}
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internal PdfIndirectReference AddPageRef(PdfIndirectReference pageRef) {
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if ((pages.Count % leafSize) == 0)
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parents.Add(writer.PdfIndirectReference);
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pages.Add(pageRef);
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return (PdfIndirectReference)parents[parents.Count - 1];
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}
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// returns the top parent to include in the catalog
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internal PdfIndirectReference WritePageTree() {
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if (pages.Count == 0)
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throw new IOException("The document has no pages.");
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int leaf = 1;
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ArrayList tParents = parents;
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ArrayList tPages = pages;
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ArrayList nextParents = new ArrayList();
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while (true) {
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leaf *= leafSize;
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int stdCount = leafSize;
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int rightCount = tPages.Count % leafSize;
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if (rightCount == 0)
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rightCount = leafSize;
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for (int p = 0; p < tParents.Count; ++p) {
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int count;
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int thisLeaf = leaf;
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if (p == tParents.Count - 1) {
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count = rightCount;
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thisLeaf = pages.Count % leaf;
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if (thisLeaf == 0)
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thisLeaf = leaf;
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}
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else
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count = stdCount;
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PdfDictionary top = new PdfDictionary(PdfName.PAGES);
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top.Put(PdfName.COUNT, new PdfNumber(thisLeaf));
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PdfArray kids = new PdfArray();
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ArrayList intern = kids.ArrayList;
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intern.AddRange(tPages.GetRange(p * stdCount, count));
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top.Put(PdfName.KIDS, kids);
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if (tParents.Count > 1) {
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if ((p % leafSize) == 0)
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nextParents.Add(writer.PdfIndirectReference);
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top.Put(PdfName.PARENT, (PdfIndirectReference)nextParents[p / leafSize]);
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}
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writer.AddToBody(top, (PdfIndirectReference)tParents[p]);
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}
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if (tParents.Count == 1) {
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topParent = (PdfIndirectReference)tParents[0];
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return topParent;
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}
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tPages = tParents;
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tParents = nextParents;
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nextParents = new ArrayList();
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}
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}
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internal PdfIndirectReference TopParent {
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get {
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return topParent;
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}
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}
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internal void SetLinearMode(PdfIndirectReference topParent) {
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if (parents.Count > 1)
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throw new Exception("Linear page mode can only be called with a single parent.");
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if (topParent != null) {
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this.topParent = topParent;
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parents.Clear();
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parents.Add(topParent);
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}
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leafSize = 10000000;
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}
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internal void AddPage(PdfIndirectReference page) {
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pages.Add(page);
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}
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internal int ReorderPages(int[] order) {
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if (order == null)
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return pages.Count;
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if (parents.Count > 1)
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throw new DocumentException("Page reordering requires a single parent in the page tree. Call PdfWriter.SetLinearMode() after open.");
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if (order.Length != pages.Count)
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throw new DocumentException("Page reordering requires an array with the same size as the number of pages.");
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int max = pages.Count;
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bool[] temp = new bool[max];
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for (int k = 0; k < max; ++k) {
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int p = order[k];
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if (p < 1 || p > max)
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throw new DocumentException("Page reordering requires pages between 1 and " + max + ". Found " + p + ".");
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if (temp[p - 1])
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throw new DocumentException("Page reordering requires no page repetition. Page " + p + " is repeated.");
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temp[p - 1] = true;
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}
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Object[] copy = pages.ToArray();
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for (int k = 0; k < max; ++k) {
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pages[k] = copy[order[k] - 1];
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}
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return max;
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}
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}
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} |