Michael Jumper created GUACAMOLE-278:
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Summary: Add support for xterm's 256-color control codes
Key: GUACAMOLE-278
URL: https://issues.apache.org/jira/browse/GUACAMOLE-278
Project: Guacamole
Issue Type: Improvement
Components: SSH, Telnet, Terminal
Reporter: Michael Jumper
Guacamole currently only supports 16 colors in its terminal, whereas xterm and
its various other modern derivatives all support 256+ colors, as well as
arbitrary RGB colors. This support should be added to the Guacamole terminal,
such that applications needing 256 colors have console codes to work with.
xterm's 256-color codes are defined at
http://invisible-island.net/xterm/ctlseqs/ctlseqs.html. There are code
sequences which apply:
* Set foreground to RGB color: {{CSI 38 ; 2 ; R ; G ; B}}
* Set foreground to 256-color palette index N: {{CSI 38 ; 5 ; N}}
* Set background to RGB color: {{CSI 48 ; 2 ; R ; G ; B}}
* Set background to 256-color palette index N: {{CSI 48 ; 5 ; N}}
There is an additional {{OSC}} sequence for redefining the 256-color palette,
but that can probably be omitted for now. We have similarly omitted the
Linux-specific console code for redefining the 16-color palette, even though we
otherwise aim to support the same control sequences as the Linux console.
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