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svg is a module for iText7 that allows you to integrate SVG images in your PDF creation and manipulation process
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2018 iText Group NV
Authors: iText Software.
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: [email protected]
*/
package com.itextpdf.svg.renderers;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
import com.itextpdf.svg.exceptions.SvgLogMessageConstant;
import com.itextpdf.svg.exceptions.SvgProcessingException;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
/**
* The SvgDrawContext keeps a stack of {@link PdfCanvas} instances, which
* represent all levels of XObjects that are added to the root canvas.
*/
public class SvgDrawContext {
private final Map namedObjects = new HashMap<>();
private final Stack canvases = new Stack<>();
private final Stack viewports = new Stack<>();
/**
* Retrieves the current top of the stack, without modifying the stack.
*
* @return the current canvas that can be used for drawing operations.
*/
public PdfCanvas getCurrentCanvas() {
return canvases.peek();
}
/**
* Retrieves the current top of the stack, thereby taking the current item
* off the stack.
*
* @return the current canvas that can be used for drawing operations.
*/
public PdfCanvas popCanvas() {
return canvases.pop();
}
/**
* Adds a {@link PdfCanvas} to the stack (by definition its top), for use in
* drawing operations.
*
* @param canvas the new top of the stack
*/
public void pushCanvas(PdfCanvas canvas) {
canvases.push(canvas);
}
/**
* Get the current size of the stack, signifying the nesting level of the
* XObjects.
*
* @return the current size of the stack.
*/
public int size() {
return canvases.size();
}
/**
* Adds a viewbox to the context.
*
* @param viewPort rectangle representing the current viewbox
*/
public void addViewPort(Rectangle viewPort) {
this.viewports.push(viewPort);
}
/**
* Get the current viewbox.
*
* @return the viewbox as it is currently set
*/
public Rectangle getCurrentViewPort() {
return this.viewports.peek();
}
/**
* Remove the currently set view box.
*/
public void removeCurrentViewPort() {
if (this.viewports.size() > 0) {
this.viewports.pop();
}
}
/**
* Adds a named object to the draw context. These objects can then be referenced from a different tag.
*
* @param name name of the object
* @param namedObject object to be referenced
*/
public void addNamedObject(String name, Object namedObject) {
if ( namedObject == null ) {
throw new SvgProcessingException(SvgLogMessageConstant.NAMED_OBJECT_NULL);
}
if ( name == null || name.isEmpty() ) {
throw new SvgProcessingException(SvgLogMessageConstant.NAMED_OBJECT_NAME_NULL_OR_EMPTY);
}
if (!this.namedObjects.containsKey(name) || namedObject instanceof PdfFormXObject) {
this.namedObjects.put(name, namedObject);
}
}
/**
* Get a named object based on its name. If the name isn't listed, this method will return null.
*
* @param name name of the object you want to reference
* @return the referenced object
*/
public Object getNamedObject(String name) {
return this.namedObjects.get(name);
}
}