Text Surrounding

[Thiago Milczarek Sayão]

Hi Andy,

I understand you're working on a Rich Text control.

While working on IME (Input Method Editor) for Linux, I noticed that there
is a feature called "surrounding"
that it supports to give the IME information about the text being inputted.
More info here:

https://docs.gtk.org/gtk3/class.IMContext.html

It works like this:

When user is typing using an IME language, the underlying IME (for example
https://github.com/tlwg/ibus-libthai)
may ask the Toolkit for the surrounding text and it should reply with:

https://docs.gtk.org/gtk3/method.IMContext.set_surrounding.html

That contains:
- The text
- The length
- The cursor position within the text

So this way the underlying IME can provide accurate suggestions using the
user context.

That would be a nice feature to have but it requires some work to retrieve
it from the text-based control.

Just letting you know about this, it may be out of the scope of your rich
text work for now.

-- Thiago.
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