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Support OSC 4 terminal colour-palette queries.

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Markus Gans points out that some applications which (not at all
unreasonably) don't trust $TERM to tell them the full capabilities of
their terminal will use the sequence "OSC 4 ; nn ; ? BEL" to ask for
the colour-palette value in position nn, and they may not particularly
care _what_ the results are but they will use them to decide whether
the right number of colour palette entries even exist.
This commit is contained in:
Simon Tatham
2017-10-05 20:43:02 +01:00
parent 262376a054
commit 4743798400
5 changed files with 96 additions and 35 deletions
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11
unix/gtkwin.c
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@ -2222,6 +2222,17 @@ void palette_set(void *frontend, int n, int r, int g, int b)
}
}
int palette_get(void *frontend, int n, int *r, int *g, int *b)
{
struct gui_data *inst = (struct gui_data *)frontend;
if (n < 0 || n >= NALLCOLOURS)
return FALSE;
*r = inst->cols[n].red >> 8;
*g = inst->cols[n].green >> 8;
*b = inst->cols[n].blue >> 8;
return TRUE;
}
void palette_reset(void *frontend)
{
struct gui_data *inst = (struct gui_data *)frontend;