Struct TerminalCaps 

pub struct TerminalCaps {
    pub tty: bool,
    pub colors: bool,
    pub spinner: bool,
    pub bracketed_paste: bool,
    pub raw_mode: bool,
    pub scroll_region: bool,
    pub unicode_symbols: bool,
}

Fields

tty: bool

stdout is a TTY (vs. pipe/redirect/CI).

colors: bool

Emit SGR colour codes.

spinner: bool

Show animated spinner (requires overwritable current line).

bracketed_paste: bool

Enable bracketed paste mode (DECSET 2004).

raw_mode: bool

Raw mode for key-by-key input.

scroll_region: bool

DECSTBM scroll region support (\x1b[top;bot r) — lets us pin a fixed-footer area at the bottom and have streaming content scroll only in the upper region. VT100+ standard; supported by every modern emulator (Terminal.app, iTerm2, Alacritty, WezTerm, Windows Terminal, tmux). Disabled on dumb terminals and non-TTY contexts.

unicode_symbols: bool

Render decorative Unicode glyphs (❯, ◆, box-drawing corners). Off → use ASCII fallbacks (>, *, +) so minimal terminals (Windows legacy console, Docker/CI, POSIX locale without a full font) don’t show □ tofu. Set via:

• ATOMCODE_ASCII=1 env var (explicit opt-out)
• TERM=dumb
• LC_ALL/LANG being C / POSIX / ANSI_X3.4-1968

Implementations

impl TerminalCaps

pub fn from_env(env: EnvView) -> Self

pub fn probe() -> Self

pub fn prompt_chevron(&self) -> &'static str

Two-cell prompt prefix for the input box and echoed user lines. "❯ " when the terminal can render Unicode glyphs, "> " as the ASCII fallback. Both are exactly 2 display columns, so layout math (text_budget = w - 2) stays identical in both branches.

Trait Implementations

impl Clone for TerminalCaps

fn clone(&self) -> TerminalCaps

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TerminalCaps

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for TerminalCaps