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/*
* $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.aowagie.text.pdf;
import java.util.HashMap;
import java.util.LinkedHashMap;
class PageResources {
private final PdfDictionary fontDictionary = new PdfDictionary();
private final PdfDictionary xObjectDictionary = new PdfDictionary();
private final PdfDictionary colorDictionary = new PdfDictionary();
private final PdfDictionary patternDictionary = new PdfDictionary();
private final PdfDictionary shadingDictionary = new PdfDictionary();
private final PdfDictionary extGStateDictionary = new PdfDictionary();
private final PdfDictionary propertyDictionary = new PdfDictionary();
private HashMap forbiddenNames;
private PdfDictionary originalResources;
private int namePtr[] = {0};
private HashMap usedNames;
PageResources() {
}
void setOriginalResources(final PdfDictionary resources, final int newNamePtr[]) {
if (newNamePtr != null) {
this.namePtr = newNamePtr;
}
this.forbiddenNames = new LinkedHashMap();
this.usedNames = new LinkedHashMap();
if (resources == null) {
return;
}
this.originalResources = new PdfDictionary();
this.originalResources.merge(resources);
for (final Object element : resources.getKeys()) {
final PdfName key = (PdfName)element;
final PdfObject sub = PdfReader.getPdfObject(resources.get(key));
if (sub != null && sub.isDictionary()) {
final PdfDictionary dic = (PdfDictionary)sub;
for (final Object element2 : dic.getKeys()) {
this.forbiddenNames.put(element2, null);
}
final PdfDictionary dic2 = new PdfDictionary();
dic2.merge(dic);
this.originalResources.put(key, dic2);
}
}
}
private PdfName translateName(final PdfName name) {
PdfName translated = name;
if (this.forbiddenNames != null) {
translated = (PdfName)this.usedNames.get(name);
if (translated == null) {
while (true) {
translated = new PdfName("Xi" + this.namePtr[0]++);
if (!this.forbiddenNames.containsKey(translated)) {
break;
}
}
this.usedNames.put(name, translated);
}
}
return translated;
}
PdfName addFont(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.fontDictionary.put(name, reference);
return name;
}
PdfName addXObject(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.xObjectDictionary.put(name, reference);
return name;
}
PdfName addColor(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.colorDictionary.put(name, reference);
return name;
}
void addDefaultColor(final PdfDictionary dic) {
this.colorDictionary.merge(dic);
}
void addDefaultColorDiff(final PdfDictionary dic) {
this.colorDictionary.mergeDifferent(dic);
}
PdfName addShading(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.shadingDictionary.put(name, reference);
return name;
}
PdfName addPattern(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.patternDictionary.put(name, reference);
return name;
}
PdfName addExtGState(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.extGStateDictionary.put(name, reference);
return name;
}
PdfName addProperty(PdfName name, final PdfIndirectReference reference) {
name = translateName(name);
this.propertyDictionary.put(name, reference);
return name;
}
PdfDictionary getResources() {
final PdfResources resources = new PdfResources();
if (this.originalResources != null) {
resources.putAll(this.originalResources);
}
resources.put(PdfName.PROCSET, new PdfLiteral("[/PDF /Text /ImageB /ImageC /ImageI]"));
resources.add(PdfName.FONT, this.fontDictionary);
resources.add(PdfName.XOBJECT, this.xObjectDictionary);
resources.add(PdfName.COLORSPACE, this.colorDictionary);
resources.add(PdfName.PATTERN, this.patternDictionary);
resources.add(PdfName.SHADING, this.shadingDictionary);
resources.add(PdfName.EXTGSTATE, this.extGStateDictionary);
resources.add(PdfName.PROPERTIES, this.propertyDictionary);
return resources;
}
boolean hasResources() {
return this.fontDictionary.size() > 0
|| this.xObjectDictionary.size() > 0
|| this.colorDictionary.size() > 0
|| this.patternDictionary.size() > 0
|| this.shadingDictionary.size() > 0
|| this.extGStateDictionary.size() > 0
|| this.propertyDictionary.size() > 0;
}
}
