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iText, a free Java-PDF library
/*
* $Id: PageResources.java 3117 2008-01-31 05:53:22Z xlv $
*
* 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/
*/
package com.lowagie.text.pdf;
import java.util.HashMap;
import java.util.Iterator;
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 HashMap forbiddenNames;
protected PdfDictionary originalResources;
protected int namePtr[] = {0};
protected HashMap usedNames;
PageResources() {
}
void setOriginalResources(PdfDictionary resources, int newNamePtr[]) {
if (newNamePtr != null)
namePtr = newNamePtr;
forbiddenNames = new HashMap();
usedNames = new HashMap();
if (resources == null)
return;
originalResources = new PdfDictionary();
originalResources.merge(resources);
for (Iterator i = resources.getKeys().iterator(); i.hasNext();) {
PdfName key = (PdfName)i.next();
PdfObject sub = PdfReader.getPdfObject(resources.get(key));
if (sub != null && sub.isDictionary()) {
PdfDictionary dic = (PdfDictionary)sub;
for (Iterator j = dic.getKeys().iterator(); j.hasNext();) {
forbiddenNames.put(j.next(), null);
}
PdfDictionary dic2 = new PdfDictionary();
dic2.merge(dic);
originalResources.put(key, dic2);
}
}
}
PdfName translateName(PdfName name) {
PdfName translated = name;
if (forbiddenNames != null) {
translated = (PdfName)usedNames.get(name);
if (translated == null) {
while (true) {
translated = new PdfName("Xi" + (namePtr[0]++));
if (!forbiddenNames.containsKey(translated))
break;
}
usedNames.put(name, translated);
}
}
return translated;
}
PdfName addFont(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
fontDictionary.put(name, reference);
return name;
}
PdfName addXObject(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
xObjectDictionary.put(name, reference);
return name;
}
PdfName addColor(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
colorDictionary.put(name, reference);
return name;
}
void addDefaultColor(PdfName name, PdfObject obj) {
if (obj == null || obj.isNull())
colorDictionary.remove(name);
else
colorDictionary.put(name, obj);
}
void addDefaultColor(PdfDictionary dic) {
colorDictionary.merge(dic);
}
void addDefaultColorDiff(PdfDictionary dic) {
colorDictionary.mergeDifferent(dic);
}
PdfName addShading(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
shadingDictionary.put(name, reference);
return name;
}
PdfName addPattern(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
patternDictionary.put(name, reference);
return name;
}
PdfName addExtGState(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
extGStateDictionary.put(name, reference);
return name;
}
PdfName addProperty(PdfName name, PdfIndirectReference reference) {
name = translateName(name);
propertyDictionary.put(name, reference);
return name;
}
PdfDictionary getResources() {
PdfResources resources = new PdfResources();
if (originalResources != null)
resources.putAll(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;
}
boolean hasResources() {
return (fontDictionary.size() > 0
|| xObjectDictionary.size() > 0
|| colorDictionary.size() > 0
|| patternDictionary.size() > 0
|| shadingDictionary.size() > 0
|| extGStateDictionary.size() > 0
|| propertyDictionary.size() > 0);
}
}