Module term_query 

Terminal graphics capability + cell-pixel-size detection. The response PARSERS here are pure and unit-tested; the I/O round-trip in detect is verified manually (no PTY tests, per project policy).

Structs

TermGraphics

What the terminal supports, plus its cell pixel size when reported.

Functions

detect

Probe the terminal for graphics support. Writes the query sequences to /dev/tty, reads the response with a short deadline, and parses it. Falls back to environment heuristics when the round-trip yields nothing. Pure ASCII (no support) is represented by an all-false TermGraphics.

env_fallback

Best-effort capability guess from environment variables, used when the active query times out (e.g. inside some terminal multiplexers).

parse_responses

Parse a batch of terminal query responses (raw bytes) into capabilities. Looks for: Kitty ESC _ G ... ; OK ESC \, a DA1 ESC [ ? <attrs> c whose attribute list contains 4 (Sixel), and a cell-size report ESC [ 6 ; <h> ; <w> t.