Soft hyphens lost on conversion to EPUB

David Booth · 06-22-2017, 01:47 PM

We are developing an input plugin for OSIS - an XML based format used for Bibles. We are finding that on conversion to EPUB, soft hyphens are being lost. These are actual UTF-8 soft hyphen characters generated by the input plugin as opposed to entities. It appears that these characters are being removed by the EPUB output plugin, since when using the --debug-pipeline option they are there in the html files in the processed directory, but when files are unzipped from the EPUB output they have gone. We cannot rely on HTML5 soft-hyphen dictionaries since we work with documents in many languages for which there is no hyphen dictionary (e.g. Uzbek). Is there a way of preventing these characters from being removed?

kovidgoyal · 06-22-2017, 01:54 PM

https://www.mobileread.com/forums/sho...d.php?t=186697

kovidgoyal · 06-22-2017, 01:55 PM

Actually never mind, the EPUB output plugin removes them deliberately because adobe digital editions older versions have problems with them

David Booth · 06-23-2017, 06:13 AM

I understand. It's a pity there is no way to disable this behaviour though. Might you consider introducing an EPUB output option to do this?

kovidgoyal · 06-23-2017, 06:33 AM

It's pretty trivial to run calibre from source and just comeent out the copule of lines that do this in the epub output plugin. See https://manual.calibre-ebook.com/develop.html

06-22-2017, 01:47 PM	#1
David Booth Junior Member Posts: 2 Karma: 10 Join Date: Jun 2017 Location: Huntingdon, England Device: Calibre reader	Soft hyphens lost on conversion to EPUB We are developing an input plugin for OSIS - an XML based format used for Bibles. We are finding that on conversion to EPUB, soft hyphens are being lost. These are actual UTF-8 soft hyphen characters generated by the input plugin as opposed to entities. It appears that these characters are being removed by the EPUB output plugin, since when using the --debug-pipeline option they are there in the html files in the processed directory, but when files are unzipped from the EPUB output they have gone. We cannot rely on HTML5 soft-hyphen dictionaries since we work with documents in many languages for which there is no hyphen dictionary (e.g. Uzbek). Is there a way of preventing these characters from being removed?

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06-22-2017, 01:54 PM	#2
kovidgoyal creator of calibre Posts: 43,843 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	https://www.mobileread.com/forums/sho...d.php?t=186697

06-22-2017, 01:55 PM	#3
kovidgoyal creator of calibre Posts: 43,843 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Actually never mind, the EPUB output plugin removes them deliberately because adobe digital editions older versions have problems with them

06-23-2017, 06:13 AM	#4
David Booth Junior Member Posts: 2 Karma: 10 Join Date: Jun 2017 Location: Huntingdon, England Device: Calibre reader	I understand. It's a pity there is no way to disable this behaviour though. Might you consider introducing an EPUB output option to do this?

06-23-2017, 06:33 AM	#5
kovidgoyal creator of calibre Posts: 43,843 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It's pretty trivial to run calibre from source and just comeent out the copule of lines that do this in the epub output plugin. See https://manual.calibre-ebook.com/develop.html