Simulate (a subset of) a VT-5xx ANSI terminal

Source: R/vt.R

This is utility function that calculates the state of a VT-5xx screen after a certain set of output.

vt_output(output, width = 80L, height = 25L)

Arguments

output

Character vector or raw vector. Character vectors are collapsed (without a separater), and converted to a raw vector using base::charToRaw().

width

Terminal width.

height

Terminal height.

Value

Data frame with columns lineno, segmentno, segment, attributes.

Details

Currently it supports:

  • configurable terminal width and height

  • ASCII printable characters.

  • \n, \r.

  • ANSI SGR colors, 8 color mode, 256 color mode and true color mode.

  • Other ANSI SGR features: bold, italic, underline, strikethrough, blink, inverse.

It does not currently supports other features, mode notably:

  • Other ANSI control sequences and features. Other control sequences are silently ignored.

  • Wide Unicode characters. Their width is not taken into account correctly.

  • Unicode graphemes.

Note

This function is experimental, and the virtual temrinal API will likely change in future versions of cli.