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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2024 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;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.kernel.colors.Color;
import com.itextpdf.kernel.pdf.action.PdfAction;
import com.itextpdf.kernel.pdf.colorspace.PdfColorSpace;
import com.itextpdf.kernel.pdf.navigation.PdfDestination;
import java.util.ArrayList;
import java.util.List;
/**
* Document outline object
* See ISO-320001, 12.3.3 Document Outline.
*/
public class PdfOutline {
/**
* A flag for displaying the outline item’s text with italic font.
*/
public static int FLAG_ITALIC = 1;
/**
* A flag for displaying the outline item’s text with bold font.
*/
public static int FLAG_BOLD = 2;
private List children = new ArrayList<>();
private String title;
private PdfDictionary content;
private PdfDestination destination;
private PdfOutline parent;
private PdfDocument pdfDoc;
/**
* Create instance of document outline.
*
* @param title the text that shall be displayed on the screen for this item.
* @param content Outline dictionary
* @param pdfDocument {@link PdfDocument} the outline belongs to.
*/
PdfOutline(String title, PdfDictionary content, PdfDocument pdfDocument) {
this.title = title;
this.content = content;
this.pdfDoc = pdfDocument;
}
/**
* Create instance of document outline.
*
* @param title the text that shall be displayed on the screen for this item.
* @param content Outline dictionary
* @param parent parent outline.
* {@link #addOutline(String, int)} and {@link #addOutline(String)} instead.
*/
PdfOutline(String title, PdfDictionary content, PdfOutline parent) {
this.title = title;
this.content = content;
this.parent = parent;
this.pdfDoc = parent.pdfDoc;
content.makeIndirect(parent.pdfDoc);
}
/**
* This constructor creates root outline in the document.
*
* @param doc {@link PdfDocument}
*/
PdfOutline(PdfDocument doc) {
content = new PdfDictionary();
content.put(PdfName.Type, PdfName.Outlines);
this.pdfDoc = doc;
content.makeIndirect(doc);
doc.getCatalog().addRootOutline(this);
}
/**
* Gets title of the outline.
*
* @return String value.
*/
public String getTitle() {
return title;
}
/**
* Sets title of the outline with {@link PdfEncodings#UNICODE_BIG} encoding,
* {@code Title} key.
*
* @param title String value.
*/
public void setTitle(String title) {
this.title = title;
this.content.put(PdfName.Title, new PdfString(title, PdfEncodings.UNICODE_BIG));
}
/**
* Sets color for the outline entry’s text, {@code C} key.
*
* @param color {@link Color}
*/
public void setColor(Color color) {
content.put(PdfName.C, new PdfArray(color.getColorValue()));
}
/**
* Gets color for the outline entry's text, {@code C} key.
*
* @return color {@link Color}.
*/
public Color getColor() {
PdfArray colorArray = content.getAsArray(PdfName.C);
if (colorArray == null) {
return null;
} else {
return Color.makeColor(PdfColorSpace.makeColorSpace(PdfName.DeviceRGB),
colorArray.toFloatArray());
}
}
/**
* Sets text style for the outline entry’s text, {@code F} key.
*
* @param style Could be either {@link #FLAG_BOLD} or {@link #FLAG_ITALIC}. Default value is {@code 0}.
*/
public void setStyle(int style) {
if (style == FLAG_BOLD || style == FLAG_ITALIC) {
content.put(PdfName.F, new PdfNumber(style));
}
}
/**
* Gets text style for the outline entry's text, {@code F} key.
*
* @return style value.
*/
public Integer getStyle() {
return content.getAsInt(PdfName.F);
}
/**
* Gets content dictionary.
*
* @return {@link PdfDictionary}.
*/
public PdfDictionary getContent() {
return content;
}
/**
* Gets list of children outlines.
*
* @return List of {@link PdfOutline}.
*/
public List getAllChildren() {
return children;
}
/**
* Gets parent outline.
*
* @return {@link PdfOutline}.
*/
public PdfOutline getParent() {
return parent;
}
/**
* Gets {@link PdfDestination}.
*
* @return {@link PdfDestination}.
*/
public PdfDestination getDestination() {
return destination;
}
/**
* Adds {@link PdfDestination} for the outline, {@code Dest} key.
*
* @param destination instance of {@link PdfDestination}.
*/
public void addDestination(PdfDestination destination) {
setDestination(destination);
content.put(PdfName.Dest, destination.getPdfObject());
}
/**
* Adds {@link PdfAction} for the outline, {@code A} key.
*
* @param action instance of {@link PdfAction}.
*/
public void addAction(PdfAction action) {
PdfName actionType = action.getPdfObject().getAsName(PdfName.S);
if (PdfName.GoTo.equals(actionType)) {
PdfObject destObject = action.getPdfObject().get(PdfName.D);
if (destObject != null) {
setDestination(PdfDestination.makeDestination(destObject));
}
}
content.put(PdfName.A, action.getPdfObject());
}
/**
* Defines if the outline needs to be closed or not.
* By default, outlines are open.
*
* @param open if false, the outline will be closed by default
*/
public void setOpen(boolean open) {
if (!open)
content.put(PdfName.Count, new PdfNumber(-1));
else if (children.size() > 0)
content.put(PdfName.Count, new PdfNumber(children.size()));
else
content.remove(PdfName.Count);
}
/**
* Defines if the outline is open or closed.
*
* @return true if open,false otherwise.
*/
public boolean isOpen() {
Integer count = content.getAsInt(PdfName.Count);
return count == null || count >= 0;
}
/**
* Adds a new {@code PdfOutline} with specified parameters as a child to existing {@code PdfOutline}
* and put it to specified position in the existing {@code PdfOutline} children list.
*
* @param title an outline title
* @param position a position in the current outline child List where a new outline should be added.
* If the position equals -1, then the outline will be put in the end of children list.
* @return just created outline
*/
public PdfOutline addOutline(String title, int position) {
if (position == -1)
position = children.size();
PdfDictionary dictionary = new PdfDictionary();
PdfOutline outline = new PdfOutline(title, dictionary, this);
dictionary.put(PdfName.Title, new PdfString(title, PdfEncodings.UNICODE_BIG));
dictionary.put(PdfName.Parent, content);
if (children.size() > 0) {
if (position != 0) {
PdfDictionary prevContent = children.get(position - 1).getContent();
dictionary.put(PdfName.Prev, prevContent);
prevContent.put(PdfName.Next, dictionary);
}
if (position != children.size()) {
PdfDictionary nextContent = children.get(position).getContent();
dictionary.put(PdfName.Next, nextContent);
nextContent.put(PdfName.Prev, dictionary);
}
}
if (position == 0)
content.put(PdfName.First, dictionary);
if (position == children.size())
content.put(PdfName.Last, dictionary);
PdfNumber count = this.content.getAsNumber(PdfName.Count);
if (count == null || count.getValue() != -1) {
content.put(PdfName.Count, new PdfNumber(children.size() + 1));
}
children.add(position, outline);
return outline;
}
/**
* Adds an {@code PdfOutline} as a child to existing {@code PdfOutline}
* and put it in the end of the existing {@code PdfOutline} children list.
*
* @param title an outline title
* @return just created outline
*/
public PdfOutline addOutline(String title) {
return addOutline(title, -1);
}
/**
* Adds an {@code PdfOutline} as a child to existing {@code PdfOutline}
* and put it to the end of the existing {@code PdfOutline} children list.
*
* @param outline an outline to add.
* @return just created outline
*/
public PdfOutline addOutline(PdfOutline outline) {
PdfOutline newOutline = addOutline(outline.getTitle());
newOutline.addDestination(outline.getDestination());
List children = outline.getAllChildren();
for (PdfOutline child : children) {
newOutline.addOutline(child);
}
return newOutline;
}
/**
* Remove this outline from the document. Outlines that are children of this outline are removed recursively
*/
public void removeOutline() {
if (!pdfDoc.hasOutlines() || isOutlineRoot()) {
pdfDoc.getCatalog().remove(PdfName.Outlines);
return;
}
PdfOutline parent = this.parent;
List children = parent.children;
children.remove(this);
PdfDictionary parentContent = parent.content;
if (children.size() > 0) {
parentContent.put(PdfName.First, children.get(0).content);
parentContent.put(PdfName.Last, children.get(children.size() - 1).content);
} else {
parent.removeOutline();
return;
}
PdfDictionary next = content.getAsDictionary(PdfName.Next);
PdfDictionary prev = content.getAsDictionary(PdfName.Prev);
if (prev != null) {
if (next != null) {
prev.put(PdfName.Next, next);
next.put(PdfName.Prev, prev);
} else {
prev.remove(PdfName.Next);
}
} else if (next != null) {
next.remove(PdfName.Prev);
}
}
/**
* Clear list of children.
*/
void clear() {
children.clear();
}
/**
* Sets {@link PdfDestination}.
*
* @param destination instance of {@link PdfDestination}.
*/
void setDestination(PdfDestination destination) {
this.destination = destination;
}
/**
* Gets the Outline root in {@link PdfOutline#pdfDoc}'s catalog entry
*
* @return The {@link PdfDictionary} of the document's Outline root, or {@code null} if it can't be found.
*/
private PdfDictionary getOutlineRoot() {
if (!pdfDoc.hasOutlines()) {
return null;
}
return pdfDoc.getCatalog().getPdfObject().getAsDictionary(PdfName.Outlines);
}
/**
* Determines if the current {@link PdfOutline} object is the Outline Root.
*
* @return {@code false} if this is not the outline root or the root can not be found, {@code true} otherwise.
*/
private boolean isOutlineRoot() {
PdfDictionary outlineRoot = getOutlineRoot();
return outlineRoot == content;
}
}
