microsoft / microsoft/terminal

Investigate using ZWNJ at the beginning of COOKED_READ_DATA line

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Area-CookedRead Area-Input Issue-Feature Product-Conhost
Dominant language
C++
Stars
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Forks
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Avg merge
3d 17h
Merged PRs (30d)
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Description

This is a follow on from #514.

We could potentially insert a ZWNJ at the beginning of a cooked read data line to prevent ligature joins from happening between the immutable text and the prompt line for applications that use the cooked read data services of the conhost.exe. This would make this work automagically for cmd.exe and a bunch of little utilities.

There are some concerns about sending that through ConPTY that I think are justified (as would be required to make this work in any fashion on the Windows Terminal UI).

Either way, this is going to need someone to fool around with it and see what works and what doesn't.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the context from issue #514 and the behavior of cooked read data in conhost.exe. Experiment with inserting a ZWNJ at the beginning of a cooked read data line, checking ligature behavior for cmd.exe and other utilities, and whether sending it through ConPTY causes problems; done means the behavior and tradeoffs are established.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
cli, operating-systems
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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