PuTTY wish unicode-normalisation

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summary: Apply Unicode normalisation to combining characters
class: wish: This is a request for an enhancement.
difficulty: tricky: Needs many tuits.
depends: mdpi unicode-combining
priority: low: We aren't sure whether to fix this or not.

The bug unicode-combining is marked as fixed. However, it mentioned that the sequence of code points occupying a character cell ought to be maintained in Normalisation Form C (see UAX #15). This has not yet been done, although combining character support is complete in all other respects.

I was originally convinced of the need for normalisation simply because it was what xterm did. I'm now less certain, and I wonder if it ought to be configurable (and if so whether the particular normalisation form in use ought to be configurable too).

Regardless, this is a big job, and in particular it will require considerable code size increase since normalisation is a job needing large tables. Therefore, I fear it will have to wait until we have mdpi done.

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Audit trail for this wish.

(last revision of this bug record was at 2017-04-28 16:52:45 +0100)