com.openhtmltopdf.render.ContentLimitContainer failing in updateTop method in some cases.

[adilxoxo]

I am not able to get this issue as it is happening in one particular setup. It is working on other setups. Can you please help me to understand this methods purpose. So I can understand where I need to check.

It is failing with no exception message.

#Class Name::com.openhtmltopdf.render.ContentLimitContainer:: Method Name::updateTop:: Line Number::69#

[syjer]

hi @adilxoxo , what do you mean by "it fail" (if there are no exception)?

Do you have an example ?

[adilxoxo]

I can not tell certain example but I would like to know in which cases it might fail. Just give me clear idea or guide me to doc regarding same.

Because this is happening only for some particular reports.

This is log generated my app. I will share stack trace soon.

2020.09.14 14:33:24 diff: 0 Thread: 3b Session: 0 Event: ERROR Source: AbstractPDFReport::printPDFReport[150] >
#Class Name::com.openhtmltopdf.render.ContentLimitContainer:: Method Name::updateTop:: Line Number::69#
2020.09.14 14:33:24 diff: 0 Thread: 3b Session: 0 Event: ERROR Source: AbstractPDFReport::printPDFReport[152] >

[adilxoxo]

Please find stack trace below for same issue.

2020.09.15 15:48:52 diff: 0 Thread: 2f Session: 0 Event: ERROR Source: AbstractPDFReport::printPDFReport[157] > null
java.lang.NullPointerException
at com.openhtmltopdf.render.ContentLimitContainer.updateTop(ContentLimitContainer.java:69)
at com.openhtmltopdf.render.Box.analyzePageBreaks(Box.java:1279)
at com.openhtmltopdf.newtable.TableBox.analyzePageBreaks(TableBox.java:388)
at com.openhtmltopdf.render.Box.analyzePageBreaks(Box.java:1281)
at com.openhtmltopdf.render.Box.analyzePageBreaks(Box.java:1281)
at com.openhtmltopdf.newtable.TableRowBox.analyzePageBreaks(TableRowBox.java:141)
at com.openhtmltopdf.render.Box.analyzePageBreaks(Box.java:1281)
at com.openhtmltopdf.newtable.TableBox.analyzePageBreaks(TableBox.java:388)
at com.openhtmltopdf.newtable.TableBox.analyzePageBreaks(TableBox.java:374)
at com.openhtmltopdf.newtable.TableBox.layoutTable(TableBox.java:287)
at com.openhtmltopdf.newtable.TableBox.layout(TableBox.java:242)
at com.openhtmltopdf.layout.BlockBoxing.layoutBlockChild0(BlockBoxing.java:321)
at com.openhtmltopdf.layout.BlockBoxing.layoutBlockChild(BlockBoxing.java:299)
at com.openhtmltopdf.layout.BlockBoxing.layoutContent(BlockBoxing.java:90)
at com.openhtmltopdf.render.BlockBox.layoutChildren(BlockBox.java:1204)
at com.openhtmltopdf.render.BlockBox.layout(BlockBox.java:1058)
at com.openhtmltopdf.render.BlockBox.layout(BlockBox.java:973)
at com.openhtmltopdf.layout.BlockBoxing.layoutBlockChild0(BlockBoxing.java:321)
at com.openhtmltopdf.layout.BlockBoxing.layoutBlockChild(BlockBoxing.java:299)
at com.openhtmltopdf.layout.BlockBoxing.layoutContent(BlockBoxing.java:90)
at com.openhtmltopdf.render.BlockBox.layoutChildren(BlockBox.java:1204)
at com.openhtmltopdf.render.BlockBox.layout(BlockBox.java:1058)
at com.openhtmltopdf.render.BlockBox.layout(BlockBox.java:973)
at com.openhtmltopdf.pdfboxout.PdfBoxRenderer.layout(PdfBoxRenderer.java:339)
at com.openhtmltopdf.pdfboxout.PdfRendererBuilder.run(PdfRendererBuilder.java:41)
at com.brixip.core.pdf.report.abstracts.AbstractPDFReport.printPDFReport(AbstractPDFReport.java:147)
at com.brixip.core.pdf.report.impl.PDFMapImpl.generate(PDFMapImpl.java:40)
at com.brixip.buss.reports.impl.ReportServiceImpl.merge(ReportServiceImpl.java:2866)
at com.brixip.controller.reportmgmt.ReportsDownloadServlet.getMergedPDF(ReportsDownloadServlet.java:108)
at com.brixip.controller.reportmgmt.ReportsDownloadServlet$1.call(ReportsDownloadServlet.java:71)
at com.brixip.controller.reportmgmt.ReportsDownloadServlet$1.call(ReportsDownloadServlet.java:68)
at com.pvmsys.brix.app.session.provider.SessionProvider.execute(SessionProvider.java:600)
at com.pvmsys.brix.app.session.ods.OdsSession.execute(OdsSession.java:447)
at com.brixip.controller.reportmgmt.ReportsDownloadServlet.doPost(ReportsDownloadServlet.java:68)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:126)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:60)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet.java:120)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

[syjer]

thank you, the NullPointerException is the one i expected, as in the code:

openhtmltopdf/openhtmltopdf-core/src/main/java/com/openhtmltopdf/render/ContentLimitContainer.java

Line 69 in 8be80a4

getContentLimit(page.getPageNo(), true).updateTop(absY);

I can't really see other possibilities.

So it seems getContentLimit return a null. Looks like there is some kind of corner case.

Could you provide a minimal reproducer? Unfortunately I don't think I'm able to debug without it.

[adilxoxo]

What kind of data do you need ?

We use free marker to generate html string from template then by using jsoup we convert that data into w3c doc.

Data passed to free marker is map and json.

[syjer]

The html template that generates this error. You should try to remove as much as possible html/text/css.

…

On Tue, Sep 15, 2020 at 1:39 PM Adil ***@***.***> wrote: What kind of data do you need ? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#553 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AADZTYV7GNNVEH6DVEZQF7LSF5G7NANCNFSM4RLQ75VQ> .

[adilxoxo]

Code snippet :

            PdfRendererBuilder builder = new PdfRendererBuilder();
            builder.useFastMode();
            builder.withW3cDocument(getDocument(input),null);
            builder.toStream(outputStream);
            builder.run();

     public  Document getDocument(String input) throws Exception {
	org.w3c.dom.Document w3cDoc = null;
	org.jsoup.nodes.Document jsoupdoc = Jsoup.parse(input,"UTF-8");
	W3CDom w3cDom = new W3CDom();
	w3cDoc = w3cDom.fromJsoup(jsoupdoc);
	return w3cDoc;
  }

PFA for html template causing issue.

template.zip

[syjer]

I did a try with the version 1.0.4 using the following code:

       try (OutputStream os = new FileOutputStream("test.pdf")) {
            PdfRendererBuilder builder = new PdfRendererBuilder();
            builder.useFastMode();
            builder.withW3cDocument(W3CDom.convert(Jsoup.parse(new File("template.html"), "UTF-8", "")), "");

            builder.toStream(os);
            builder.run();
        }

and it generate the following pdf, without any issues:

test.pdf

[adilxoxo]

Can you please try adding fonts to it.

        File calibri = new File(fontpath+"calibri.ttf");
        File math = new File(fontpath+"maths.ttf");
        File jp = new File(fontpath+"arialuni.ttf");
        builder.useFont(calibri, Font.createFont(Font.TRUETYPE_FONT, calibri).getFamily());
        builder.useFont(math, Font.createFont(Font.TRUETYPE_FONT, math).getFamily());

        builder.useFont(jp, Font.createFont(Font.TRUETYPE_FONT, jp).getFamily());

After looking at your code I tried removing fonts from builder and found that after adding arialuni font to builder is causing issue. I am using version 1.0.3.
PFA for font files.

fonts.zip

[syjer]

Using your template.html with the provided fonts work as expected, with both version 1.0.3 and 1.0.4.

Full code:

package test;

import com.openhtmltopdf.pdfboxout.PdfRendererBuilder;
import org.jsoup.Jsoup;
import org.jsoup.helper.W3CDom;

import java.awt.*;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

public class App {
    public static void main(String[] args) throws Exception {

        try (OutputStream os = new FileOutputStream("test.pdf")) {
            PdfRendererBuilder builder = new PdfRendererBuilder();
            builder.useFastMode();

            File calibri = new File("calibri.ttf");
            File math = new File("MATHS.ttf");
            File jp = new File("arialuni.ttf");
            builder.useFont(calibri, Font.createFont(Font.TRUETYPE_FONT, calibri).getFamily());
            builder.useFont(math, Font.createFont(Font.TRUETYPE_FONT, math).getFamily());
            builder.useFont(jp, Font.createFont(Font.TRUETYPE_FONT, jp).getFamily());

            builder.withW3cDocument(W3CDom.convert(Jsoup.parse(new File("template.html"), "UTF-8", "")), "");
            builder.toStream(os);
            builder.run();
        }
    }
}

Maybe it's some data that you have removed from the template.html file which cause an issue?

[adilxoxo]

Actually I might be able to fix it as I was ignoring warning for missing ; in style tag.

After adding ; to ** box-sizing: border-box** now its working.

Let me run more scenarios. If issue comes up again will ping you.

Thank you for the help by the way @syjer

[adilxoxo]

Hi,

I am able to reproduce this issue again.

Please try attached template file.

template.zip

This issue occurs when we add empty lines to some data... in my case empty line looks like <p>&nbsp;</p>.

Also I found this issue #399 which seems similar to mine as it is occurring while page break inside table.

[adilxoxo]

I tried debugging code in library and at one point it returns null with input values as below,

pageNo ==== 1
_contentLimits.size() ==== 0
_initialPageNo ==== 2
_contentLimits ==== []
target ==== -1

Also I am able to reslove this issue by replacing border-spacing: 0; -fs-table-paginate: paginate; by -fs-table-paginate: paginate; border-collapse: collapse;

Does order of applying css matters??

also the table border is not proper at page break as shown in below image,

[danfickle]

Hi @adilxoxo,

In answer to your original question, the method is designed to reserve space as required for paginated table header and footer on each page.

I'll try to have a look over the weekend.