[haiku-gsoc] Re: Rendering of Indic Languages in Haiku
- From: Stephan Aßmus <superstippi@xxxxxx>
- To: haiku-gsoc@xxxxxxxxxxxxx
- Date: Fri, 19 May 2017 10:25:41 +0200
Hi,
Am 19.05.2017 um 09:54 schrieb digib0y:
I just realized that we forgot in your project proposal that
BTextView needs adjustments for the cursor navigation and selection
to handle clusters properly.
What adjustments exactly? I read about BTextView and I personally I
think it works the way it should. Please tell me more about it.
I am almost sure that BTextView caret positioning works on the
"character" level. Which should be wrong if multiple characters are
needed to encode a single "glyph".
You demonstrate this well in your video. I mean to say that if you
change the text rendering to use shaping, BTextView would still allow to
position the text cursor inbetween two characters which are actually
combined by shaping.
In other text layout APIs, there are usually methods to know the "next"
and "previous" possible caret position from a given position. We would
need to offer the same and make BTextView use it.
Also, just after post we need to start working on the application. I
will require you help. I went through the application you suggested also
I have found one which uses ICU.
https://github.com/tangrams/harfbuzz-example
Can you please check and then we can decide which one to work on?
Sure, no problem.
Best regards,
-Stephan
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