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wezterm/vtparse
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Wez Furlong a249021920 vtparse: simplify csi dispatch 
This commit removes the intermediates parameter and collapses it
together with the parameters themselves.

This allows us to model DECSET (eg: `CSI ? 1 l`) correctly.
Previously this would get reported as:

```
  params: [1],
  intermediates: ['?'],
  code: 'l'
```

but since the intermediates are logically things that precede the code,
the canonical interpretation of that would be as if we'd received
`CSI 1 ? l`.

AFAICT, DECSET isn't conforming to ECMA 48 when it comes to this
sequence.

That made things a bit of a headache in the CSI parser, so what we do
now is to treat intermediates as parameters so that it is much simpler
to reason about and match in the CSI parser; we now get:

```
  params: ['?', 1],
  code: 'l',
```

refs: https://github.com/wez/wezterm/issues/955
2021-07-24 12:44:49 -07:00
..
src vtparse: simplify csi dispatch 2021-07-24 12:44:49 -07:00
Cargo.toml vtparse/termwiz: prep for release 2021-04-14 13:04:23 -07:00
README.md vtparse: document things 2019-06-29 19:13:45 -07:00

README.md

vtparse

This is an implementation of a parser for escape and control sequences. It is based on the DEC ANSI Parser.

It has been modified slightly to support UTF-8 sequences.

vtparse is the lowest level parser; it categorizes the basic types of sequences but does not ascribe any semantic meaning to them.

You may wish to look at termwiz::escape::parser::Parser in the termwiz crate if you're looking for semantic parsing.

Comparison with the vte crate

vtparse has support for dynamically sized OSC buffers, which makes it suitable for processing large escape sequences, such as those used by the iTerm2 image protocol.