Class AnsiOutput

Pure ANSI console output.

ANSI Output Architecture:

Pure ANSI - All output operations use ANSI escape sequences via EscSeqUtils, making it portable across ANSI-compatible terminals (Unix, Windows Terminal, ConEmu, etc.).
Buffer Capture - GetLastBuffer() provides access to the last written IOutputBuffer for test verification, independent of actual console output.
Graceful Degradation - Detects if console is unavailable or redirected, silently operating in buffer-only mode for CI/headless environments.
Size Management - Uses SetSize(int, int) for controlling terminal dimensions in tests. In real terminals, size would be queried via ANSI requests (see CSI_ReportWindowSizeInChars) or platform APIs.

Color Support: Supports both 16-color (via Force16Colors) and true-color (24-bit RGB) output through ANSI SGR sequences.

public class AnsiOutput : OutputBase, IOutput, IDisposable

Inherited Members: OutputBase.GetSixels()

OutputBase.GetLastOutput()

OutputBase.AppendOrWriteAttribute(StringBuilder, Attribute, TextStyle)

OutputBase.BuildAnsiForRegion(IOutputBuffer, int, int, int, int, StringBuilder, ref Attribute?, Func<int, int, bool>, bool)

OutputBase.AppendCellAnsi(Cell, StringBuilder, ref Attribute?, ref TextStyle, int, ref int, ref int)

OutputBase.ToAnsi(IOutputBuffer)

OutputBase.IsAttachedToTerminal

OutputBase.Force16Colors

OutputBase.IsLegacyConsole

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Constructors

AnsiOutput(): Initializes a new instance of AnsiOutput. Checks if a real console is available for ANSI output and activates the alternate screen buffer.

GetLastBuffer(): Gets or sets the last output buffer written. The Contents contains a reference to the buffer last written with Write(IOutputBuffer).

GetSize(): Returns the current size of the console in rows/columns (i.e. of characters not pixels).

HandleSizeQueryResponse(string?): Handles ANSI size query responses. Expected format: ESC [ 8 ; height ; width t

SetCursorPositionImpl(int, int): When overriden in derived class, positions the terminal draw cursor to the specified point on the screen. Note, this does NOT update any internal cursor position state - that is the responsibility of the caller.

Suspend(): Suspend the application / terminal (e.g. SIGTSTP on Unix) and perform any driver-specific state save/restore required across the suspend/resume cycle. Implementations on platforms that do not support suspension may be a no-op.

Write(ReadOnlySpan<char>): Writes the given text directly to the console. Use to send ansi escape codes etc. Regular screen output should use the IOutputBuffer overload.