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iTechSharp/iTextSharp/text/pdf/PageResources.cs
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194
iTechSharp/iTextSharp/text/pdf/PageResources.cs
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using System;
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using System.Collections;
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/*
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* $Id: PageResources.cs,v 1.6 2006/09/24 15:48:24 psoares33 Exp $
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*
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* Copyright 2003-2005 by Paulo Soares.
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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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public class PageResources {
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protected PdfDictionary fontDictionary = new PdfDictionary();
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protected PdfDictionary xObjectDictionary = new PdfDictionary();
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protected PdfDictionary colorDictionary = new PdfDictionary();
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protected PdfDictionary patternDictionary = new PdfDictionary();
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protected PdfDictionary shadingDictionary = new PdfDictionary();
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protected PdfDictionary extGStateDictionary = new PdfDictionary();
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protected PdfDictionary propertyDictionary = new PdfDictionary();
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protected Hashtable forbiddenNames;
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protected PdfDictionary originalResources;
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protected int[] namePtr = {0};
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protected Hashtable usedNames;
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internal PageResources() {
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}
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internal void SetOriginalResources(PdfDictionary resources, int[] newNamePtr) {
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if (newNamePtr != null)
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namePtr = newNamePtr;
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forbiddenNames = new Hashtable();
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usedNames = new Hashtable();
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if (resources == null)
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return;
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originalResources = new PdfDictionary();
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originalResources.Merge(resources);
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foreach (PdfName key in resources.Keys) {
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PdfObject sub = PdfReader.GetPdfObject(resources.Get(key));
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if (sub != null && sub.IsDictionary()) {
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PdfDictionary dic = (PdfDictionary)sub;
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foreach (PdfName name in dic.Keys) {
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forbiddenNames[name] = null;
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}
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PdfDictionary dic2 = new PdfDictionary();
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dic2.Merge(dic);
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originalResources.Put(key, dic2);
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}
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}
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}
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internal PdfName TranslateName(PdfName name) {
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PdfName translated = name;
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if (forbiddenNames != null) {
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translated = (PdfName)usedNames[name];
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if (translated == null) {
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while (true) {
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translated = new PdfName("Xi" + (namePtr[0]++));
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if (!forbiddenNames.ContainsKey(translated))
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break;
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}
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usedNames[name] = translated;
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}
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}
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return translated;
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}
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internal PdfName AddFont(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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fontDictionary.Put(name, reference);
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return name;
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}
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internal PdfName AddXObject(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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xObjectDictionary.Put(name, reference);
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return name;
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}
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internal PdfName AddColor(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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colorDictionary.Put(name, reference);
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return name;
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}
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internal void AddDefaultColor(PdfName name, PdfObject obj) {
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if (obj == null || obj.IsNull())
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colorDictionary.Remove(name);
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else
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colorDictionary.Put(name, obj);
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}
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internal void AddDefaultColor(PdfDictionary dic) {
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colorDictionary.Merge(dic);
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}
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internal void AddDefaultColorDiff(PdfDictionary dic) {
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colorDictionary.MergeDifferent(dic);
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}
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internal PdfName AddShading(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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shadingDictionary.Put(name, reference);
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return name;
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}
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internal PdfName AddPattern(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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patternDictionary.Put(name, reference);
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return name;
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}
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internal PdfName AddExtGState(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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extGStateDictionary.Put(name, reference);
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return name;
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}
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internal PdfName AddProperty(PdfName name, PdfIndirectReference reference) {
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name = TranslateName(name);
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propertyDictionary.Put(name, reference);
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return name;
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}
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internal PdfDictionary Resources {
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get {
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PdfResources resources = new PdfResources();
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if (originalResources != null)
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resources.Merge(originalResources);
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resources.Put(PdfName.PROCSET, new PdfLiteral("[/PDF /Text /ImageB /ImageC /ImageI]"));
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resources.Add(PdfName.FONT, fontDictionary);
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resources.Add(PdfName.XOBJECT, xObjectDictionary);
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resources.Add(PdfName.COLORSPACE, colorDictionary);
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resources.Add(PdfName.PATTERN, patternDictionary);
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resources.Add(PdfName.SHADING, shadingDictionary);
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resources.Add(PdfName.EXTGSTATE, extGStateDictionary);
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resources.Add(PdfName.PROPERTIES, propertyDictionary);
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return resources;
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}
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}
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internal bool HasResources() {
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return (fontDictionary.Size > 0
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|| xObjectDictionary.Size > 0
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|| colorDictionary.Size > 0
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|| patternDictionary.Size > 0
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|| shadingDictionary.Size > 0
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|| extGStateDictionary.Size > 0
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|| propertyDictionary.Size > 0);
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}
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}
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}
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