feat: new theme system

[sxyazi]

Yazi now supports rewriting most of the UI using Lua and fully utilizes existing layout components.

You only need to import it as a plugin in yazi.toml:

[plugins]
preload = [
  "~/.config/yazi/my-ui.lua"
]

and rewrite the parts you want, such as:

function Header:render(area)
	local line = ui.Line {
		ui.Span("Hello, world!"):fg("red"),
		ui.Span("Hello, world!"):fg("green"),
	}

	return {
		ui.Paragraph(area, { line }),
	}
end

Then we have:

The new theme system documentation is currently in progress. For now, you can refer to the preset components at https://github.com/sxyazi/yazi/tree/main/plugin/preset/components

TODOs:

Features:

• Progress
• Highlighting
• Short path

Issues:

• Toggle for more file info #220
• fix: collect and fix all hard coded themes and color #221, default theme is not friendly for light terminal background #149
• What does the "99% 1 left" mean? #110 (comment)
• Closes A more visually explicit cut/yank mode #204
• Closes remove operation don't complete #246

The PR is bigger than anticipated and has taken more time.

There are still some unfinished works, additional PRs will be implemented shortly to prevent this one from continuing to expand.

[Brixy]

Thanks a lot for this excellent file manager! I use it on a daily basis.

I have played a bit with the current theming options and would like to suggest options to style

• executable files,
• symbolic links, and
• empty files (or maybe different colors for different file sizes, including 0 byte).

Maybe this can be (or already is?) considered in your new theme system. Thank you very much!

[sxyazi]

Thanks for the suggestions; this is something I've been planning to do all along, but it might not be included in this big PR but rather in the smaller one that follows, as part of a progressive enhancement.

[Brixy]

Excellent. Not only is your file manager of top quality, but also very well maintained! Thanks a lot for this.

[magnetophon]

Excellent. Not only is your file manager of top quality, but also very well maintained! Thanks a lot for this.

I just wanted to repeat this! ❤

[magnetophon]

Not sure it it's ready for testing, but I just tried this branch, and got a crash:

  store                   │  0a9kdk3ialqxd8ckcb4764p2x3bzpdl1-jq-1.6-man             │  share thread 'main' panicked at 'cannot create a Lua reference, out of auxiliary stack space (used 1000197 slots)', /build/cargo-vendor-dir/mlua-0.9.1/src/lua.rs:3557:133bd7x0bs-kauth-5.110.0-dev      │
                            │  0bfh848j3il4zkdf7an9lqiinote: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
                            │  0bh9girfsnxryz6s9snmrl2pka4vs40h-nghttp2-1.51.0         │                                            fish: Job 1, 'nix run' terminated by signal SIGABRT (Abort)
                            │  0bw18xfl5x1f3w6v1b65zwarvcm7c7y7-hdf5-1.14.2            │                                                                                                       ⏎            
    ~/source/yazi   pr-9712724b !1 ───────────────────────────────────────────────────────────────────────────────────────────────────────────────── ✘ ABRT   39m 39s   1.69.0-nightly  18:28:04
❮ jhhh
                            │  0cc31xc2rdafrb45bf7895hb8y75xan6-alsa-lib-1.2.9-dev     │

I was browsing my nix store, which is huge.
I just copied the output as it appeared on my terminal, some of this is fro my prompt, some of it from the yazi gui, some of it from the error.

I also noticed it was much slower than other versions of yazi, at least in this huge dir.

[sxyazi]

Hey @magnetophon, I've pushed a new optimized version, and it should work. Thanks for your interest in this ongoing feature.

[magnetophon]

Hey @magnetophon, I've pushed a new optimized version, and it should work. Thanks for your interest in this ongoing feature.

Now it's blazing fast again, with no crashes.
Thank you!

[sxyazi]

I have played a bit with the current theming options and would like to suggest options to style

@Brixy Hi, this PR is completed. I have some time to work on it next. Would you like to file an issue for that?