Support for true color in ChromeOS hterm

[lescx]

Summary

ChromeOS's terminal hterm does provide support for true color.

Helix seems to not recognize the capability of hterm for 24-bit color support. Instead, it returns the fallback light/dark color scheme with the following log notification:

Unsupported theme: theme requires true color support

Helix log

~/.cache/helix/helix.log

luca@penguin:~/.cache/helix$ tail -30 helix.log
2024-02-07T23:58:50.122 helix_view::theme [WARN] Theme: invalid modifier: "normal"
2024-02-07T23:58:50.122 helix_view::theme [WARN] Theme: invalid modifier: "normal"
2024-02-07T23:58:50.122 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.622 helix_view::theme [WARN] Theme: invalid modifier: "normal"
2024-02-07T23:58:50.623 helix_view::theme [WARN] Theme: invalid modifier: "normal"
2024-02-07T23:58:50.623 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.674 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.726 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.777 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.827 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.930 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:50.981 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:51.140 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:51.192 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:51.249 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:51.295 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:51.346 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-07T23:58:55.642 helix_view::editor [ERROR] editor error: Unsupported theme: theme requires true color support
2024-02-08T00:04:02.659 helix_view::clipboard [DEBUG] Using tmux to interact with the system clipboard
2024-02-08T00:04:02.659 helix_tui::backend::crossterm [DEBUG] The keyboard enhancement protocol is not supported in this terminal (checked in 140.276µs)
2024-02-08T00:04:02.659 helix_view::document [DEBUG] id 1 modified - last saved: 0, current: 0
2024-02-08T00:04:02.659 helix_term::application [DEBUG] received editor event: IdleTimer
2024-02-08T00:04:03.340 helix_view::document [DEBUG] id 1 modified - last saved: 0, current: 0
2024-02-08T00:04:03.342 helix_term::application [DEBUG] received editor event: IdleTimer
2024-02-08T00:04:03.522 helix_term::commands::typed [DEBUG] quitting...
2024-02-08T00:04:03.523 helix_view::document [DEBUG] id 1 modified - last saved: 0, current: 0
2024-02-08T00:04:03.697 helix_term::commands::typed [DEBUG] quitting...
2024-02-08T00:04:03.697 helix_view::document [DEBUG] id 1 modified - last saved: 0, current: 0
2024-02-08T00:04:03.697 helix_term::job [DEBUG] waiting on jobs...
2024-02-08T00:04:03.697 helix_term::job [DEBUG] waiting on jobs...
luca@penguin:~/.cache/helix$

Platform

ChromeOS Version 120.0.6099.272 (Official Build) (64-bit)

Terminal Emulator

hterm + chrome-untrusted://terminal

TERM=screen-256color

Installation Method

releases page

Helix Version

helix 23.10 (f6021dd)

[kirawi]

I think I prematurely converted this into a discussion, but we use COLORTERM which needs to be set to either truecolor or 24bit:

helix/helix-term/src/lib.rs

Lines 25 to 30 in a1272bd

	#[cfg(not(windows))]
	fn true_color() -> bool {
	std::env::var("COLORTERM")
	.map(|v| matches!(v.as_str(), "truecolor" | "24bit"))
	.unwrap_or(false)
	}

You can set editor.true-color = true in your config to force it for now