DOCX -> EPUB NCX generation?

jindroush · 11-08-2024, 07:50 AM

Hi,
how is NCX generation supposed to work?

I have defined several heading styles NOT based on Heading styles. But with correct depth settings. In docx file I see the correct levels 1-3 in Navigation pane. I have included Word TOC in text, it's correctly generated for levels 1 and 2 only.

When I convert DOCX to EPUB, everything is fine, EXCEPT for the fact that NCX is flat. Ie. it contains both levels 1 and 2, but in 'root' level only, not nested.

I've checked all the TOC settings in conversions, but I can't find anything regarding NCX and all the settings are most probably only for inclusion of HTML TOC, which I don't need. I'm pretty sure I docx->epub converted files in the past and they had multi-level NCX files.

To sum up: Everything is okay, works okay, except that NCX is flat.

kovidgoyal · 11-08-2024, 09:03 AM

Create a ToC in the word document and it will be automatically used. See the sample at https://manual.calibre-ebook.com/con...word-documents

jindroush · 11-08-2024, 09:15 AM

Sorry, I don't understand. That's what I think I did.

There is TOC in the text of the document - { TOC \o "1-2" \h \z \u }.
It's displayed correctly in the text of DOCX and in the text of calibre-converted EPUB.

But generated NCX file - ie. the TOC displayed on the side of the Calibre Viewer (or in ebook reader) is flattened. That means that Calibre has correctly found all TOC items, but works with them as with 'level 1' items (incorrectly, as they use level 1 and level 2).

kovidgoyal · 11-08-2024, 10:53 AM

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

jindroush · 11-08-2024, 11:15 AM

Attached is minimal example DOCX, which, when converted by Calibre 7.21.0, does create NCX with 4 items, but all on level 1. Word TOC contains two items on level 1, and two on level 2.

DOCX was created on latest Office365 version. (2410, 18129.20116)

kovidgoyal · 11-08-2024, 11:31 AM

https://github.com/kovidgoyal/calibr...31a0622ec1a7a1

jindroush · 11-08-2024, 11:42 AM

That was quite unexpected.
I tried to workaround it temporarily by changing TOC2 style 'left' to integer in centimeters, but, alas, it has to be integer in points. That is quite confusing in word.

Thanks for the fix anyway!

Quoth · 11-09-2024, 03:46 AM

Centimetres & Inches are ONLY for PDF and direct print. Use em, pt, % or px in ebooks according to context.
A px can mean a pixel, but it's not really.

Mostly for text 12 pt = 1 em. Occasionally some ereaders might get indents in pt wrong, so converting pt of margins to em is recommended.

11-08-2024, 07:50 AM	#1
jindroush Connoisseur Posts: 94 Karma: 104 Join Date: Nov 2014 Device: Kindle	DOCX -> EPUB NCX generation? Hi, how is NCX generation supposed to work? I have defined several heading styles NOT based on Heading styles. But with correct depth settings. In docx file I see the correct levels 1-3 in Navigation pane. I have included Word TOC in text, it's correctly generated for levels 1 and 2 only. When I convert DOCX to EPUB, everything is fine, EXCEPT for the fact that NCX is flat. Ie. it contains both levels 1 and 2, but in 'root' level only, not nested. I've checked all the TOC settings in conversions, but I can't find anything regarding NCX and all the settings are most probably only for inclusion of HTML TOC, which I don't need. I'm pretty sure I docx->epub converted files in the past and they had multi-level NCX files. To sum up: Everything is okay, works okay, except that NCX is flat.

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11-08-2024, 09:03 AM	#2
kovidgoyal creator of calibre Posts: 45,146 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Create a ToC in the word document and it will be automatically used. See the sample at https://manual.calibre-ebook.com/con...word-documents

11-08-2024, 09:15 AM	#3
jindroush Connoisseur Posts: 94 Karma: 104 Join Date: Nov 2014 Device: Kindle	Sorry, I don't understand. That's what I think I did. There is TOC in the text of the document - { TOC \o "1-2" \h \z \u }. It's displayed correctly in the text of DOCX and in the text of calibre-converted EPUB. But generated NCX file - ie. the TOC displayed on the side of the Calibre Viewer (or in ebook reader) is flattened. That means that Calibre has correctly found all TOC items, but works with them as with 'level 1' items (incorrectly, as they use level 1 and level 2).

11-08-2024, 10:53 AM	#4
kovidgoyal creator of calibre Posts: 45,146 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	https://www.mobileread.com/forums/sh...d.php?t=186697

11-08-2024, 11:31 AM	#6
kovidgoyal creator of calibre Posts: 45,146 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	https://github.com/kovidgoyal/calibr...31a0622ec1a7a1

11-08-2024, 11:42 AM	#7
jindroush Connoisseur Posts: 94 Karma: 104 Join Date: Nov 2014 Device: Kindle	That was quite unexpected. I tried to workaround it temporarily by changing TOC2 style 'left' to integer in centimeters, but, alas, it has to be integer in points. That is quite confusing in word. Thanks for the fix anyway!

11-09-2024, 03:46 AM	#8
Quoth Still reading Posts: 13,643 Karma: 103503445 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	Centimetres & Inches are ONLY for PDF and direct print. Use em, pt, % or px in ebooks according to context. A px can mean a pixel, but it's not really. Mostly for text 12 pt = 1 em. Occasionally some ereaders might get indents in pt wrong, so converting pt of margins to em is recommended.

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