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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 .
*/
package com.itextpdf.kernel.pdf.action;
import com.itextpdf.io.logs.IoLogMessageConstant;
import com.itextpdf.kernel.exceptions.PdfException;
import com.itextpdf.kernel.exceptions.KernelExceptionMessageConstant;
import com.itextpdf.kernel.pdf.PdfArray;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfNameTree;
import com.itextpdf.kernel.pdf.PdfNumber;
import com.itextpdf.kernel.pdf.PdfObject;
import com.itextpdf.kernel.pdf.PdfObjectWrapper;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfString;
import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
import com.itextpdf.kernel.pdf.annot.PdfFileAttachmentAnnotation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.Map;
/**
* A target dictionary locates the target in relation to the source,
* in much the same way that a relative path describes the physical
* relationship between two files in a file system. Target dictionaries may be
* nested recursively to specify one or more intermediate targets before reaching the final one.
*/
public class PdfTarget extends PdfObjectWrapper {
private PdfTarget(PdfDictionary pdfObject) {
super(pdfObject);
}
/**
* Creates a new {@link PdfTarget} object by the underlying dictionary.
*
* @param pdfObject the underlying dictionary object
* @return a new {@link PdfTarget} object by the underlying dictionary
*/
public static PdfTarget create(PdfDictionary pdfObject) {
return new PdfTarget(pdfObject);
}
/**
* Creates a new {@link PdfTarget} object given its type. The type must be either
* {@link PdfName#P}, or {@link PdfName#C}. If it is {@link PdfName#C}, additional entries must be specified
* according to the spec.
*
* @param r the relationship between the current document and the target
*/
private static PdfTarget create(PdfName r) {
PdfTarget pdfTarget = new PdfTarget(new PdfDictionary());
pdfTarget.put(PdfName.R, r);
return pdfTarget;
}
/**
* Creates a new target object pointing to the parent of the current document.
*
* @return created {@link PdfTarget}
*/
public static PdfTarget createParentTarget() {
return PdfTarget.create(PdfName.P);
}
/**
* Creates a new target object pointing to the child of the current document.
*
* @return created {@link PdfTarget}
*/
public static PdfTarget createChildTarget() {
return PdfTarget.create(PdfName.C);
}
/**
* Creates a new target object pointing to a file in the EmbeddedFiles name tree.
*
* @param embeddedFileName the name of the file in the EmbeddedFiles name tree
* @return created object
*/
public static PdfTarget createChildTarget(String embeddedFileName) {
return PdfTarget.create(PdfName.C).
put(PdfName.N, new PdfString(embeddedFileName));
}
/**
* Creates a new target object pointing to a file attachment annotation.
*
* @param namedDestination a named destination in the current document that
* provides the page number of the file attachment annotation
* @param annotationIdentifier a unique annotation identifier ({@link PdfName#NM} entry) of the annotation
* @return created object
*/
public static PdfTarget createChildTarget(String namedDestination, String annotationIdentifier) {
return PdfTarget.create(PdfName.C).
put(PdfName.P, new PdfString(namedDestination)).
put(PdfName.A, new PdfString(annotationIdentifier));
}
/**
* Creates a new target object pointing to a file attachment annotation.
*
* @param pageNumber the number of the page in the current document, one-based
* @param annotationIndex the index of the annotation in the Annots entry of the page, zero-based
* @return created object
*/
public static PdfTarget createChildTarget(int pageNumber, int annotationIndex) {
return PdfTarget.create(PdfName.C).
put(PdfName.P, new PdfNumber(pageNumber - 1)).
put(PdfName.A, new PdfNumber(annotationIndex));
}
/**
* Sets the name of the file in the EmbeddedFiles name tree for the child target located
* in the EmbeddedFiles.
*
* @param name the name of the file
* @return this object wrapper
*/
public PdfTarget setName(String name) {
return put(PdfName.N, new PdfString(name));
}
/**
* Gets name of the file in the EmbeddedFiles name tree for the child target located
* in the EmbeddedFiles.
*
* @return the name of the child file for this target
*/
public String getName() {
return getPdfObject().getAsString(PdfName.N).toString();
}
/**
* Sets the /P and /A values corresponding to provided annotation, which is already added to a page.
*
* @param pdfAnnotation the annotation to be set
* @param pdfDocument the corresponding document
* @return this object wrapper
*/
public PdfTarget setAnnotation(PdfFileAttachmentAnnotation pdfAnnotation, PdfDocument pdfDocument) {
PdfPage page = pdfAnnotation.getPage();
if (null == page) {
throw new PdfException(KernelExceptionMessageConstant.ANNOTATION_SHALL_HAVE_REFERENCE_TO_PAGE);
} else {
put(PdfName.P, new PdfNumber(pdfDocument.getPageNumber(page) - 1));
int indexOfAnnotation = -1;
final List annots = page.getAnnotations();
for (int i = 0; i < annots.size(); i++) {
if (annots.get(i) != null &&
pdfAnnotation.getPdfObject().equals(annots.get(i).getPdfObject())) {
indexOfAnnotation = i;
break;
}
}
put(PdfName.A, new PdfNumber(indexOfAnnotation));
}
return this;
}
/**
* Gets the annotation specified by /A and /P entry values.
*
* @param pdfDocument specifies the corresponding document
* @return the annotation specified by /A and /P entry value.
*/
public PdfFileAttachmentAnnotation getAnnotation(PdfDocument pdfDocument) {
PdfObject pValue = getPdfObject().get(PdfName.P);
PdfPage page = null;
if (pValue instanceof PdfNumber) {
// zero-based index is used
page = pdfDocument.getPage(((PdfNumber) pValue).intValue() + 1);
} else if (pValue instanceof PdfString) {
PdfNameTree destsTree = pdfDocument.getCatalog().getNameTree(PdfName.Dests);
Map dests = destsTree.getNames();
PdfArray pdfArray = (PdfArray) dests.get((PdfString) pValue);
if (null != pdfArray) {
if (pdfArray.get(0) instanceof PdfNumber) {
page = pdfDocument.getPage(((PdfNumber) pdfArray.get(0)).intValue());
} else {
page = pdfDocument.getPage((PdfDictionary) pdfArray.get(0));
}
}
}
List pageAnnotations = null;
if (null != page) {
pageAnnotations = page.getAnnotations();
}
PdfObject aValue = getPdfObject().get(PdfName.A);
PdfFileAttachmentAnnotation resultAnnotation = null;
if (null != pageAnnotations) {
if (aValue instanceof PdfNumber) {
resultAnnotation = (PdfFileAttachmentAnnotation) pageAnnotations.get(((PdfNumber) aValue).intValue());
} else if (aValue instanceof PdfString) {
for (PdfAnnotation annotation : pageAnnotations) {
if (aValue.equals(annotation.getName())) {
resultAnnotation = (PdfFileAttachmentAnnotation) annotation;
break;
}
}
}
}
if (null == resultAnnotation) {
Logger logger = LoggerFactory.getLogger(PdfTarget.class);
logger.error(IoLogMessageConstant.SOME_TARGET_FIELDS_ARE_NOT_SET_OR_INCORRECT);
}
return resultAnnotation;
}
/**
* Sets a target dictionary specifying additional path information to the target document.
* If this entry is absent, the current document is the target file containing the destination.
*
* @param target the additional path target dictionary
* @return this object wrapper
*/
public PdfTarget setTarget(PdfTarget target) {
return put(PdfName.T, target.getPdfObject());
}
/**
* Get a target dictionary specifying additional path information to the target document.
* If the current target object is the final node in the target path, null is returned.
*
* @return a target dictionary specifying additional path information to the target document
*/
public PdfTarget getTarget() {
PdfDictionary targetDictObject = getPdfObject().getAsDictionary(PdfName.T);
return targetDictObject != null ? new PdfTarget(targetDictObject) : null;
}
/**
* This is a convenient method to put key-value pairs to the underlying {@link PdfObject}.
*
* @param key the key, a {@link PdfName} instance
* @param value the value
* @return this object wrapper
*/
public PdfTarget put(PdfName key, PdfObject value) {
getPdfObject().put(key, value);
return this;
}
/**
* {@inheritDoc}
*/
@Override
protected boolean isWrappedObjectMustBeIndirect() {
return false;
}
}
