Escape sequences

Compatibility tests

https://invisible-island.net/vttest/

Hacking

Escape sequences are parsed in Vt102Emulation::receiveChar(). Most sequences are handled in Vt102Emulation::processToken(), and operating system commands (OSC) are handled in Vt102Emulation::processWindowAttributeChange().

TODOs

• OSC 4 (Change Color Number) https://github.com/lxqt/qtermwidget/issues/340
• OSC 11 (Change VT100 text background color) used by neovim to query the background color instead of $COLORFGBG; related to https://github.com/lxqt/qtermwidget/pull/406
• OSC 52 (Manipulate Selection Data) https://github.com/lxqt/qtermwidget/issues/488
• OSC 1337 (Inline Images Protocol) https://github.com/lxqt/qtermwidget/issues/207

References

• xterm: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
• iTerm2: https://www.iterm2.com/documentation-escape-codes.html
• Terminal Guide: https://terminalguide.netlify.com/seq/