/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: sales@itextpdf.com
*/
package com.itextpdf.text.pdf;
import java.util.HashMap;
import java.util.HashSet;
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 HashSet<PdfName> forbiddenNames;
protected PdfDictionary originalResources;
protected int namePtr[] = {0};
protected HashMap<PdfName, PdfName> usedNames;
PageResources() {
}
void setOriginalResources(PdfDictionary resources, int newNamePtr[]) {
if (newNamePtr != null)
namePtr = newNamePtr;
forbiddenNames = new HashSet<PdfName>();
usedNames = new HashMap<PdfName, PdfName>();
if (resources == null)
return;
originalResources = new PdfDictionary();
originalResources.merge(resources);
for (Object element : resources.getKeys()) {
PdfName key = (PdfName)element;
PdfObject sub = PdfReader.getPdfObject(resources.get(key));
if (sub != null && sub.isDictionary()) {
PdfDictionary dic = (PdfDictionary)sub;
for (PdfName element2 : dic.getKeys()) {
forbiddenNames.add(element2);
}
PdfDictionary dic2 = new PdfDictionary();
dic2.merge(dic);
originalResources.put(key, dic2);
}
}
}
PdfName translateName(PdfName name) {
PdfName translated = name;
if (forbiddenNames != null) {
translated = usedNames.get(name);
if (translated == null) {
while (true) {
translated = new PdfName("Xi" + namePtr[0]++);
if (!forbiddenNames.contains(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.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;
}
}