pemdash

A small calculator overlay with proper operator precedence.

Install on Arch Linux

yay -S pemdash

Use

cargo run --release

Type an expression. The result updates as you type.

• Enter copies the result and closes pemdash.
• Escape closes pemdash.
• Copy copies the result without closing.

Supported operators are +, -, *, /, and ^. Constants include pi, e, and tau. Functions include sqrt, sin, cos, tan, abs, ln, log10, min, max, and pow.

Examples:

2 + 2 * 2
-2^2
sin(pi / 2)
50 / sqrt(3) * 1e5
max(2, 8, 3)

Bind to Alt+F2 in niri

Build and install the binary somewhere on PATH, then add a binding to the binds block in ~/.config/niri/config.kdl:

Alt+F2 { spawn "pemdash"; }

A floating-window rule is optional:

window-rule {
    match app-id="dev.pixelcluster.pemdash"
    open-floating true
}