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225e7a1243
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 |
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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 componentCell
s- Terminal attributes are aware of modern features such as True Color, Hyperlinks and will also support sixel and iterm style terminal graphics display.
Surface
s include a log ofChange
s 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.Change
s fromSurface
can be rendered toTerminal
s.Terminal
s 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.