Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2020 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: [email protected]
*/
package com.itextpdf.html2pdf.attach.impl.tags;
import com.itextpdf.html2pdf.LogMessageConstant;
import com.itextpdf.html2pdf.attach.ITagWorker;
import com.itextpdf.html2pdf.attach.ProcessorContext;
import com.itextpdf.html2pdf.attach.util.AccessiblePropHelper;
import com.itextpdf.html2pdf.css.CssConstants;
import com.itextpdf.html2pdf.html.AttributeConstants;
import com.itextpdf.io.util.MessageFormatUtil;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
import com.itextpdf.kernel.pdf.xobject.PdfImageXObject;
import com.itextpdf.kernel.pdf.xobject.PdfXObject;
import com.itextpdf.layout.IPropertyContainer;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.property.ObjectFit;
import com.itextpdf.styledxmlparser.node.IElementNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* TagWorker class for the {@code img} element.
*/
public class ImgTagWorker implements ITagWorker {
/**
* The logger.
*/
private static final Logger LOGGER = LoggerFactory.getLogger(ImgTagWorker.class);
/**
* The image.
*/
private Image image;
/**
* The display value.
*/
private String display;
/**
* Creates a new {@link ImgTagWorker} instance.
*
* @param element the element
* @param context the context
*/
public ImgTagWorker(IElementNode element, ProcessorContext context) {
String src = element.getAttribute(AttributeConstants.SRC);
PdfXObject imageXObject = context.getResourceResolver().retrieveImageExtended(src);
if (imageXObject != null) {
if (imageXObject instanceof PdfImageXObject) {
image = new HtmlImage((PdfImageXObject) imageXObject);
} else if (imageXObject instanceof PdfFormXObject) {
image = new HtmlImage((PdfFormXObject) imageXObject);
} else {
throw new IllegalStateException();
}
}
display = element.getStyles() != null ? element.getStyles().get(CssConstants.DISPLAY) : null;
if (element.getStyles() != null && CssConstants.ABSOLUTE.equals(element.getStyles().get(CssConstants.POSITION))) {
// TODO DEVSIX-1393: we don't support absolute positioning in inline context.
// This workaround allows to identify image as an element which needs to be processed outside of inline context.
// See AbsoluteReplacedHeight001Test.
display = CssConstants.BLOCK;
}
if (image != null) {
String altText = element.getAttribute(AttributeConstants.ALT);
if (altText != null) {
image.getAccessibilityProperties().setAlternateDescription(altText);
}
AccessiblePropHelper.trySetLangAttribute(image, element);
}
if (image != null) {
String objectFitValue = element.getStyles() != null ?
element.getStyles().get(CssConstants.OBJECT_FIT) : null;
image.setObjectFit(getObjectFitValue(objectFitValue));
}
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#processEnd(com.itextpdf.html2pdf.html.node.IElementNode, com.itextpdf.html2pdf.attach.ProcessorContext)
*/
@Override
public void processEnd(IElementNode element, ProcessorContext context) {
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#processContent(java.lang.String, com.itextpdf.html2pdf.attach.ProcessorContext)
*/
@Override
public boolean processContent(String content, ProcessorContext context) {
return false;
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#processTagChild(com.itextpdf.html2pdf.attach.ITagWorker, com.itextpdf.html2pdf.attach.ProcessorContext)
*/
@Override
public boolean processTagChild(ITagWorker childTagWorker, ProcessorContext context) {
return false;
}
/* (non-Javadoc)
* @see com.itextpdf.html2pdf.attach.ITagWorker#getElementResult()
*/
@Override
public IPropertyContainer getElementResult() {
return image;
}
/**
* Gets the display value.
*
* @return the display value
*/
String getDisplay() {
return display;
}
private ObjectFit getObjectFitValue(String objectFitValue) {
if (objectFitValue == null) {
return ObjectFit.FILL;
}
switch (objectFitValue) {
case CssConstants.CONTAIN:
return ObjectFit.CONTAIN;
case CssConstants.COVER:
return ObjectFit.COVER;
case CssConstants.SCALE_DOWN:
return ObjectFit.SCALE_DOWN;
case CssConstants.NONE:
return ObjectFit.NONE;
case CssConstants.FILL:
return ObjectFit.FILL;
default:
LOGGER.warn(MessageFormatUtil.format(
LogMessageConstant.UNEXPECTED_VALUE_OF_OBJECT_FIT, objectFitValue));
return ObjectFit.FILL;
}
}
/**
* Implementation of the Image class when used in the context of HTML to PDF conversion.
*/
private static class HtmlImage extends Image {
private static final double PX_TO_PT_MULTIPLIER = 0.75;
/**
* In iText, we use user unit for the image sizes (and by default
* one user unit = one point), whereas images are usually measured
* in pixels.
*/
private double dimensionMultiplier = 1;
/**
* Creates a new {@link HtmlImage} instance.
*
* @param xObject an Image XObject
*/
public HtmlImage(PdfImageXObject xObject) {
super(xObject);
this.dimensionMultiplier = PX_TO_PT_MULTIPLIER;
}
/**
* Creates a new {@link HtmlImage} instance.
*
* @param xObject an Image XObject
*/
public HtmlImage(PdfFormXObject xObject) {
super(xObject);
}
/* (non-Javadoc)
* @see com.itextpdf.layout.element.Image#getImageWidth()
*/
@Override
public float getImageWidth() {
return (float) (xObject.getWidth() * dimensionMultiplier);
}
/* (non-Javadoc)
* @see com.itextpdf.layout.element.Image#getImageHeight()
*/
@Override
public float getImageHeight() {
return (float) (xObject.getHeight() * dimensionMultiplier);
}
}
}
