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sak95456465
sak95456465
Known Participant
October 4, 2025
Question

different implementing kerning from harfbuzz to old text shaping engine

  • October 4, 2025
  • 2 replies
  • 291 views

Hello

Refer to this thread

https://community.adobe.com/t5/indesign-discussions/diacritics-omitted-in-arabic-persian-text-when-exporting-to-pdf-in-indesign-19-5/m-p/15388012

 

I found a bug  in Arabic indesign. when you type "zer with none joiner" between to chracters If there is a kerning between these characters in old text shaping indesign ignors kerning but in new text shaping It ignors zwnj character and implements kerning so what happend? when you open idml of old files tou may see some changes in your layout and in long documnets It would be disaster.

sample text: می‌گرداندند 

There is zwnj between ی and گ. in screenshot you can see different.

Thanks

 

2 replies

Joel Cherney
Community Expert
Joel CherneyCommunity Expert
Community Expert
October 4, 2025

In your previous thread, @sak95456465 , you found that clearing overrides would resolve the diacritic drops. I know that doing this won't be a useful fix for you, but it makes me wonder. When I was experimenting with switching back and forth between the legacy shaping engine and HarfBuzz, I found that I often had to make some kind of change in order to get things to tender correctly. Like you, I didn't want to just clear overrides on the whole frame, as there were local overrides (e.g. tracking and kerning) that I wanted to keep. Instead I used "Recompose All Stories" which fixed the rendering of the diacritic in the given glyph renderer without affecting anything else. 

 

It's a long shot, but: does typing the non-joiner, switching to HarfBuzz, and recomposing your story work? The shortcut is Ctrl Alt / on Windows.  It might work in place of the technique you developed in the linked thread of clearing overrides, but it wouldn't touch your local formatting. 

E
Community Expert
Eugene TysonCommunity Expert
Community Expert
October 5, 2025

Another way and the way I use is the Quick Apply - it's the Lightening Bolt in the top right of the app (can't rememeber the shortcut, something like CTRL Return or CMD Return key)

 

Then type in Recompose All Stories. 

 

If that's helpful. I don't know.

    sak95456465
    sak95456465Author
    Known Participant
    October 13, 2025

    @Eugene Tyson @Joel Cherney Thanks for your reply. I think implementing harfbuzz is for improving indesign type not adding many bugs and inconsistency. by using new version of indesign I am worry every time to see new bugs. for instant in calibri font I use zwnj to disable conditional opentyp feature and in harfbuzz It will not work (see attached video and picture in دریا word) and by enabling and disabling and changing size of text box dot will moves and It is weird. or user can move curser between two element of ligature (for example affl) and type space or zwnj but In new type engine cannot. and we are confused even in version 20.5. Thanks

    E
    Community Expert
    Eugene TysonCommunity Expert
    Community Expert
    October 4, 2025

    In the InDesign preferences there's an option for something along this line - it might not be same thing

    see this thread

    https://community.adobe.com/t5/indesign-discussions/hamza-position-bug-with-novel-sans-arabic-from-adobe-fonts/m-p/15531163#M637395

     

     

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