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wezterm/termwiz
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Wez Furlong b05cb1241e force clusters to break around cursor boundary 
When rendering the IME composing text, I noticed that for the Korean
input sequence: shift+'ㅅ' followed by 'ㅏ' we'd render the 'ㅆ' (the
shifted first character) in black and the composing 'ㅏ' in white
against the cursor color, and that was very difficult to read,
especially at the default font size.

To resolve this, this commit:

* Forces clustering to break around the cursor boundary, so that
  we treat the cursor position as its own separately styled cluster
* Adjusts cursor/bg rendering so that we always consider the start of
  the cluster for the colors of that run.  We are guaranteed that a
  ligatured sequence will fit in the background area anyway.

This has the effect of "breaking" programming ligatures such as '->'
when cursoring through them, and decomposing them into their individual
'-' and '>' glyphs, which is a reasonable price to pay for being able
to see things better on screen.

refs: https://github.com/wez/wezterm/issues/1504
refs: https://github.com/wez/wezterm/issues/478
2022-01-05 09:20:11 -07:00
..
data Respect emoji-variation-sequences.txt 2021-11-25 14:37:24 -07:00
examples termwiz: Windows: force CP_UTF8, fix alt-screen and examples 2021-12-22 12:54:57 -07:00
src force clusters to break around cursor boundary 2022-01-05 09:20:11 -07:00
Cargo.toml termwiz: publish 0.15 2021-12-22 13:02:31 -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