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wezterm/termwiz
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Wez Furlong 225e7a1243 introduce unicode_version config 
This is a fairly far-reaching commit. The idea is:

* Introduce a unicode_version config that specifies the default level
  of unicode conformance for each newly created Terminal (each Pane)
* The unicode_version is passed down to the `grapheme_column_width`
  function which interprets the width based on the version
* `Cell` records the width so that later calculations don't need to
  know the unicode version

In a subsequent diff, I will introduce an escape sequence that allows
setting/pushing/popping the unicode version so that it can be overridden
via eg: a shell alias prior to launching an application that uses a
different version of unicode from the default.

This approach allows output from multiple applications with differing
understanding of unicode to coexist on the same screen a little more
sanely.

Note that the default `unicode_version` is set to 9, which means that
emoji presentation selectors are now by-default ignored.  This was
selected to better match the level of support in widely deployed
applications.

I expect to raise that default version in the future.

Also worth noting: there are a number of callers of
`unicode_column_width` in things like overlays and lua helper functions
that pass `None` for the unicode version: these will assume the latest
known-to-wezterm/termwiz version of unicode to be desired. If those
overlays do things with emoji presentation selectors, then there may be
some alignment artifacts. That can be tackled in a follow up commit.

refs: #1231
refs: #997
2021-11-25 09:00:45 -07:00
..
data fixup terminfo for underline color 2021-09-04 15:52:20 -07:00
examples termwiz: Remove anyhow::Result from public API 2021-01-08 00:32:30 -08:00
src introduce unicode_version config 2021-11-25 09:00:45 -07:00
Cargo.toml introduce unicode_version config 2021-11-25 09:00:45 -07:00
LICENSE.md restructure termwiz tree prior to merging into wezterm repo 2018-08-05 07:55:30 -07:00
README.md termwiz: cut 0.9.0 release 2020-05-17 12:05:46 -07:00

README.md

Terminal Wizardry

This is a rust crate that provides a number of support functions for applications interested in either displaying data to a terminal or in building a terminal emulator.

It is currently in active development and subject to fairly wild sweeping changes.

Included functionality:

  • Surface models a terminal display and its component Cells
  • Terminal attributes are aware of modern features such as True Color, Hyperlinks and will also support sixel and iterm style terminal graphics display.
  • Surfaces include a log of Changes and an API for consuming and applying deltas. This is a powerful building block for synchronizing screen instances.
  • Escape sequence parser decodes inscrutable escape sequences and gives them semantic meaning, making the code that uses them clearer. The decoded escapes can be re-encoded, allowing applications to start with the semantic meaning and emit the appropriate escape sequence without embedding obscure binary bytes.
  • Capabilities allows probing for terminal capabilities that may not be included in the system terminfo database, and overriding them in an embedding application.
  • Terminal trait provides an abstraction over unix style ttys and Windows style console APIs. Changes from Surface can be rendered to Terminals. Terminals allow decoding mouse and keyboard inputs in both blocking or non-blocking mode.
  • Widget trait allows composition of UI elements at a higher level.
  • LineEditor implements shell-like line editing functionality.

Windows Support

Termwiz understands how to work with both the legacy console APIs and the new PTY and virtual terminal features available in Windows 10, allowing for true color terminal applications on Windows 10.

Documentation

https://docs.rs/termwiz