[jira] [Comment Edited] (GUACAMOLE-278) Add support for xterm's 256-color control codes

["Michael Jumper (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GUACAMOLE-278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15980601#comment-15980601 ] 

Michael Jumper edited comment on GUACAMOLE-278 at 4/24/17 12:21 AM:
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*NOTE:* There are additional codes which are somewhat applicable here. xterm adds SGR codes 90-97 for intense foreground color and 100-107 for intense background color. From the documentation link above:

{code:none}
          If 16-color support is compiled, the following apply.  Assume
          that xterm's resources are set so that the ISO color codes are
          the first 8 of a set of 16.  Then the aixterm colors are the
          bright versions of the ISO colors:
            Ps = 9 0  -> Set foreground color to Black.
            Ps = 9 1  -> Set foreground color to Red.
            Ps = 9 2  -> Set foreground color to Green.
            Ps = 9 3  -> Set foreground color to Yellow.
            Ps = 9 4  -> Set foreground color to Blue.
            Ps = 9 5  -> Set foreground color to Magenta.
            Ps = 9 6  -> Set foreground color to Cyan.
            Ps = 9 7  -> Set foreground color to White.
            Ps = 1 0 0  -> Set background color to Black.
            Ps = 1 0 1  -> Set background color to Red.
            Ps = 1 0 2  -> Set background color to Green.
            Ps = 1 0 3  -> Set background color to Yellow.
            Ps = 1 0 4  -> Set background color to Blue.
            Ps = 1 0 5  -> Set background color to Magenta.
            Ps = 1 0 6  -> Set background color to Cyan.
            Ps = 1 0 7  -> Set background color to White.
{code}



was (Author: mike.jumper):
*NOTE:* There are additional codes which are somewhat applicable here. xterm adds SGR codes 90-97 for intense foreground color and 100-107 for intense background color. From the documentation link above:

{code:none}

          If 16-color support is compiled, the following apply.  Assume
          that xterm's resources are set so that the ISO color codes are
          the first 8 of a set of 16.  Then the aixterm colors are the
          bright versions of the ISO colors:
            Ps = 9 0  -> Set foreground color to Black.
            Ps = 9 1  -> Set foreground color to Red.
            Ps = 9 2  -> Set foreground color to Green.
            Ps = 9 3  -> Set foreground color to Yellow.
            Ps = 9 4  -> Set foreground color to Blue.
            Ps = 9 5  -> Set foreground color to Magenta.
            Ps = 9 6  -> Set foreground color to Cyan.
            Ps = 9 7  -> Set foreground color to White.
            Ps = 1 0 0  -> Set background color to Black.
            Ps = 1 0 1  -> Set background color to Red.
            Ps = 1 0 2  -> Set background color to Green.
            Ps = 1 0 3  -> Set background color to Yellow.
            Ps = 1 0 4  -> Set background color to Blue.
            Ps = 1 0 5  -> Set background color to Magenta.
            Ps = 1 0 6  -> Set background color to Cyan.
            Ps = 1 0 7  -> Set background color to White.
{code}


> 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
>            Assignee: 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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