Conversion to pdf with java in epub

Grandtoubab · 01-22-2025, 09:19 AM

Hello
I add an xhtml file called time.xhtml

Code:

 <?xml version='1.0' encoding='utf-8'?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
<head>
  <title>template</title>
  <link type="text/css" rel="stylesheet" href="stylesheet-tgp.css"/>
</head>



<body>
    <h1>Date et Heure</h1>
    <p id="datetime"></p>

    <!-- Include JavaScript at the end of the body -->
    <script src="META-INF/script.js"></script>
      

</body>
</html>

Then I add the java Script in META-INF/script.js

Code:

window.onload = function() {
    setInterval(function(){
        var date = new Date();
        var displayDate = date.toLocaleDateString();
        var displayTime = date.toLocaleTimeString();

        document.getElementById('datetime').innerHTML = displayDate + " " + displayTime;
    }, 1000); // 1000 milliseconds = 1 second
}

Then I add in the manifest

Code:

      <item href="META-INF/script.js" media-type="application/javascript" properties="scripted"/>
    <item id="id4" href="time.xhtml" media-type="application/xhtml+xml" properties="scripted"/>

All is runing perfect when I am in ebook-editor: Date and Time are displayed in the viewer.

But When I convert in pdf

Code:

ebook-convert testimp.epub testimp.pdf
1% Conversion de l’entrée en HTML…
InputFormatPlugin: EPUB Input running
on /home/guy/Documents/Livres/testimp.epub
Found HTML cover titlepage.xhtml
Parsing all content...
34% Exécution des transformations du livre numérique…
Merging user specified metadata...
Detecting structure...
Flattening CSS and remapping font sizes...
Source base font size is 12.00000pt
Removing fake margins...
Cleaning up manifest...
Trimming unused files from manifest...
Trimming 'nav.xhtml' from manifest
Creating PDF Output...
67% Exécution de l'extension PDF Output
Traceback (most recent call last):
  File "runpy.py", line 198, in _run_module_as_main
  File "runpy.py", line 88, in _run_code
  File "site.py", line 47, in <module>
  File "site.py", line 43, in main
  File "calibre/ebooks/conversion/cli.py", line 422, in main
  File "calibre/ebooks/conversion/plumber.py", line 1294, in run
  File "calibre/ebooks/conversion/plugins/pdf_output.py", line 190, in convert
  File "calibre/ebooks/conversion/plugins/pdf_output.py", line 256, in convert_text
  File "calibre/ebooks/conversion/plugins/oeb_output.py", line 32, in convert
  File "calibre/ebooks/oeb/base.py", line 1971, in to_opf2
  File "calibre/ebooks/oeb/base.py", line 1278, in to_opf2
  File "calibre/ebooks/oeb/base.py", line 364, in element
  File "src/lxml/etree.pyx", line 3186, in lxml.etree.SubElement
  File "src/lxml/apihelpers.pxi", line 206, in lxml.etree._makeSubElement
  File "src/lxml/apihelpers.pxi", line 201, in lxml.etree._makeSubElement
  File "src/lxml/apihelpers.pxi", line 325, in lxml.etree._initNodeAttributes
  File "src/lxml/apihelpers.pxi", line 336, in lxml.etree._addAttributeToNode
  File "src/lxml/apihelpers.pxi", line 1528, in lxml.etree._utf8
TypeError: Argument must be bytes or unicode, got 'NoneType'

Is it impossible the date and time when the conversion occurs?

kovidgoyal · 01-22-2025, 11:43 AM

Yeah there are no guarantees about how arbitrary javascript will work when converting. Converting to PDF works by using chromiums print to pdf function.

Quoth · 01-22-2025, 12:45 PM

Don't add Javascript if wanting a PDF.

If I wanted anything special, I'd export the epub as docx, edit as odt in LO Writer (setting margins, headers, footers, page numbering etc) and export PDF from LO Writer.a

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01-22-2025, 11:43 AM	#2
kovidgoyal creator of calibre Posts: 45,149 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Yeah there are no guarantees about how arbitrary javascript will work when converting. Converting to PDF works by using chromiums print to pdf function.

01-22-2025, 12:45 PM	#3
Quoth Still reading Posts: 13,651 Karma: 103503445 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	Don't add Javascript if wanting a PDF. If I wanted anything special, I'd export the epub as docx, edit as odt in LO Writer (setting margins, headers, footers, page numbering etc) and export PDF from LO Writer.a

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