using System; using System.Collections; /* * $Id: PageResources.cs,v 1.6 2006/09/24 15:48:24 psoares33 Exp $ * * Copyright 2003-2005 by Paulo Soares. * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (the "License"); you may not use this file except in compliance with the License. * You may obtain a copy of the License at http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code is 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above. If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library is free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more * details. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */ namespace iTextSharp.text.pdf { public class PageResources { protected PdfDictionary fontDictionary = new PdfDictionary(); protected PdfDictionary xObjectDictionary = new PdfDictionary(); protected PdfDictionary colorDictionary = new PdfDictionary(); protected PdfDictionary patternDictionary = new PdfDictionary(); protected PdfDictionary shadingDictionary = new PdfDictionary(); protected PdfDictionary extGStateDictionary = new PdfDictionary(); protected PdfDictionary propertyDictionary = new PdfDictionary(); protected Hashtable forbiddenNames; protected PdfDictionary originalResources; protected int[] namePtr = {0}; protected Hashtable usedNames; internal PageResources() { } internal void SetOriginalResources(PdfDictionary resources, int[] newNamePtr) { if (newNamePtr != null) namePtr = newNamePtr; forbiddenNames = new Hashtable(); usedNames = new Hashtable(); if (resources == null) return; originalResources = new PdfDictionary(); originalResources.Merge(resources); foreach (PdfName key in resources.Keys) { PdfObject sub = PdfReader.GetPdfObject(resources.Get(key)); if (sub != null && sub.IsDictionary()) { PdfDictionary dic = (PdfDictionary)sub; foreach (PdfName name in dic.Keys) { forbiddenNames[name] = null; } PdfDictionary dic2 = new PdfDictionary(); dic2.Merge(dic); originalResources.Put(key, dic2); } } } internal PdfName TranslateName(PdfName name) { PdfName translated = name; if (forbiddenNames != null) { translated = (PdfName)usedNames[name]; if (translated == null) { while (true) { translated = new PdfName("Xi" + (namePtr[0]++)); if (!forbiddenNames.ContainsKey(translated)) break; } usedNames[name] = translated; } } return translated; } internal PdfName AddFont(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); fontDictionary.Put(name, reference); return name; } internal PdfName AddXObject(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); xObjectDictionary.Put(name, reference); return name; } internal PdfName AddColor(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); colorDictionary.Put(name, reference); return name; } internal void AddDefaultColor(PdfName name, PdfObject obj) { if (obj == null || obj.IsNull()) colorDictionary.Remove(name); else colorDictionary.Put(name, obj); } internal void AddDefaultColor(PdfDictionary dic) { colorDictionary.Merge(dic); } internal void AddDefaultColorDiff(PdfDictionary dic) { colorDictionary.MergeDifferent(dic); } internal PdfName AddShading(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); shadingDictionary.Put(name, reference); return name; } internal PdfName AddPattern(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); patternDictionary.Put(name, reference); return name; } internal PdfName AddExtGState(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); extGStateDictionary.Put(name, reference); return name; } internal PdfName AddProperty(PdfName name, PdfIndirectReference reference) { name = TranslateName(name); propertyDictionary.Put(name, reference); return name; } internal PdfDictionary Resources { get { PdfResources resources = new PdfResources(); if (originalResources != null) resources.Merge(originalResources); resources.Put(PdfName.PROCSET, new PdfLiteral("[/PDF /Text /ImageB /ImageC /ImageI]")); resources.Add(PdfName.FONT, fontDictionary); resources.Add(PdfName.XOBJECT, xObjectDictionary); resources.Add(PdfName.COLORSPACE, colorDictionary); resources.Add(PdfName.PATTERN, patternDictionary); resources.Add(PdfName.SHADING, shadingDictionary); resources.Add(PdfName.EXTGSTATE, extGStateDictionary); resources.Add(PdfName.PROPERTIES, propertyDictionary); return resources; } } internal bool HasResources() { return (fontDictionary.Size > 0 || xObjectDictionary.Size > 0 || colorDictionary.Size > 0 || patternDictionary.Size > 0 || shadingDictionary.Size > 0 || extGStateDictionary.Size > 0 || propertyDictionary.Size > 0); } } }