001: /*
002: * $Id: PageResources.java 2414 2006-09-24 15:49:14Z psoares33 $
003: *
004: * Copyright 2003-2005 by Paulo Soares.
005: *
006: * The contents of this file are subject to the Mozilla Public License Version 1.1
007: * (the "License"); you may not use this file except in compliance with the License.
008: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
009: *
010: * Software distributed under the License is distributed on an "AS IS" basis,
011: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
012: * for the specific language governing rights and limitations under the License.
013: *
014: * The Original Code is 'iText, a free JAVA-PDF library'.
015: *
016: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
017: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
018: * All Rights Reserved.
019: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
020: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
021: *
022: * Contributor(s): all the names of the contributors are added in the source code
023: * where applicable.
024: *
025: * Alternatively, the contents of this file may be used under the terms of the
026: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
027: * provisions of LGPL are applicable instead of those above. If you wish to
028: * allow use of your version of this file only under the terms of the LGPL
029: * License and not to allow others to use your version of this file under
030: * the MPL, indicate your decision by deleting the provisions above and
031: * replace them with the notice and other provisions required by the LGPL.
032: * If you do not delete the provisions above, a recipient may use your version
033: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
034: *
035: * This library is free software; you can redistribute it and/or modify it
036: * under the terms of the MPL as stated above or under the terms of the GNU
037: * Library General Public License as published by the Free Software Foundation;
038: * either version 2 of the License, or any later version.
039: *
040: * This library is distributed in the hope that it will be useful, but WITHOUT
041: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
042: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
043: * details.
044: *
045: * If you didn't download this code from the following link, you should check if
046: * you aren't using an obsolete version:
047: * http://www.lowagie.com/iText/
048: */
049: package com.lowagie.text.pdf;
050:
051: import java.util.HashMap;
052: import java.util.Iterator;
053:
054: class PageResources {
055:
056: protected PdfDictionary fontDictionary = new PdfDictionary();
057: protected PdfDictionary xObjectDictionary = new PdfDictionary();
058: protected PdfDictionary colorDictionary = new PdfDictionary();
059: protected PdfDictionary patternDictionary = new PdfDictionary();
060: protected PdfDictionary shadingDictionary = new PdfDictionary();
061: protected PdfDictionary extGStateDictionary = new PdfDictionary();
062: protected PdfDictionary propertyDictionary = new PdfDictionary();
063: protected HashMap forbiddenNames;
064: protected PdfDictionary originalResources;
065: protected int namePtr[] = { 0 };
066: protected HashMap usedNames;
067:
068: PageResources() {
069: }
070:
071: void setOriginalResources(PdfDictionary resources, int newNamePtr[]) {
072: if (newNamePtr != null)
073: namePtr = newNamePtr;
074: forbiddenNames = new HashMap();
075: usedNames = new HashMap();
076: if (resources == null)
077: return;
078: originalResources = new PdfDictionary();
079: originalResources.merge(resources);
080: for (Iterator i = resources.getKeys().iterator(); i.hasNext();) {
081: PdfName key = (PdfName) i.next();
082: PdfObject sub = PdfReader.getPdfObject(resources.get(key));
083: if (sub != null && sub.isDictionary()) {
084: PdfDictionary dic = (PdfDictionary) sub;
085: for (Iterator j = dic.getKeys().iterator(); j.hasNext();) {
086: forbiddenNames.put(j.next(), null);
087: }
088: PdfDictionary dic2 = new PdfDictionary();
089: dic2.merge(dic);
090: originalResources.put(key, dic2);
091: }
092: }
093: }
094:
095: PdfName translateName(PdfName name) {
096: PdfName translated = name;
097: if (forbiddenNames != null) {
098: translated = (PdfName) usedNames.get(name);
099: if (translated == null) {
100: while (true) {
101: translated = new PdfName("Xi" + (namePtr[0]++));
102: if (!forbiddenNames.containsKey(translated))
103: break;
104: }
105: usedNames.put(name, translated);
106: }
107: }
108: return translated;
109: }
110:
111: PdfName addFont(PdfName name, PdfIndirectReference reference) {
112: name = translateName(name);
113: fontDictionary.put(name, reference);
114: return name;
115: }
116:
117: PdfName addXObject(PdfName name, PdfIndirectReference reference) {
118: name = translateName(name);
119: xObjectDictionary.put(name, reference);
120: return name;
121: }
122:
123: PdfName addColor(PdfName name, PdfIndirectReference reference) {
124: name = translateName(name);
125: colorDictionary.put(name, reference);
126: return name;
127: }
128:
129: void addDefaultColor(PdfName name, PdfObject obj) {
130: if (obj == null || obj.isNull())
131: colorDictionary.remove(name);
132: else
133: colorDictionary.put(name, obj);
134: }
135:
136: void addDefaultColor(PdfDictionary dic) {
137: colorDictionary.merge(dic);
138: }
139:
140: void addDefaultColorDiff(PdfDictionary dic) {
141: colorDictionary.mergeDifferent(dic);
142: }
143:
144: PdfName addShading(PdfName name, PdfIndirectReference reference) {
145: name = translateName(name);
146: shadingDictionary.put(name, reference);
147: return name;
148: }
149:
150: PdfName addPattern(PdfName name, PdfIndirectReference reference) {
151: name = translateName(name);
152: patternDictionary.put(name, reference);
153: return name;
154: }
155:
156: PdfName addExtGState(PdfName name, PdfIndirectReference reference) {
157: name = translateName(name);
158: extGStateDictionary.put(name, reference);
159: return name;
160: }
161:
162: PdfName addProperty(PdfName name, PdfIndirectReference reference) {
163: name = translateName(name);
164: propertyDictionary.put(name, reference);
165: return name;
166: }
167:
168: PdfDictionary getResources() {
169: PdfResources resources = new PdfResources();
170: if (originalResources != null)
171: resources.putAll(originalResources);
172: resources.put(PdfName.PROCSET, new PdfLiteral(
173: "[/PDF /Text /ImageB /ImageC /ImageI]"));
174: resources.add(PdfName.FONT, fontDictionary);
175: resources.add(PdfName.XOBJECT, xObjectDictionary);
176: resources.add(PdfName.COLORSPACE, colorDictionary);
177: resources.add(PdfName.PATTERN, patternDictionary);
178: resources.add(PdfName.SHADING, shadingDictionary);
179: resources.add(PdfName.EXTGSTATE, extGStateDictionary);
180: resources.add(PdfName.PROPERTIES, propertyDictionary);
181: return resources;
182: }
183:
184: boolean hasResources() {
185: return (fontDictionary.size() > 0
186: || xObjectDictionary.size() > 0
187: || colorDictionary.size() > 0
188: || patternDictionary.size() > 0
189: || shadingDictionary.size() > 0
190: || extGStateDictionary.size() > 0 || propertyDictionary
191: .size() > 0);
192: }
193: }
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