TerminalCapabilities class

Properties of the output stream that drive preset composition.

Three orthogonal capabilities:

• ansi: whether the stream supports ANSI escape codes (color, cursor manipulation, etc.).
• tty: whether the stream is connected to a real terminal. This distinguishes a true terminal (where decorators can rely on a stable line width) from an IDE Run Console (which typically supports ANSI but is a pipe with unknown width) or a file redirection.
• width: the detected terminal width in columns when the stream is a TTY and the SDK can query it. null means width is unknown — usually because tty is false, occasionally because the underlying VM call threw.

Constructors

TerminalCapabilities({required bool ansi, required bool tty, int? width})

const

Properties

ansi → bool

Stream supports ANSI escape codes.

final

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

tty → bool

Stream is connected to a real terminal (TTY).

final

width → int?

Stream's column count, when known. null otherwise.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override