Commit b63a55ac authored by Miles Bader's avatar Miles Bader
Browse files

(tty_capable_p): New function.

parent a0816661
......@@ -1987,6 +1987,31 @@ turn_off_face (f, face_id)
}
/* Return non-zero if the terminal on frame F supports all of the
capabilities in CAPS simultaneously, with foreground and background
colors FG and BG. */
int tty_capable_p (f, caps, fg, bg)
struct frame *f;
unsigned caps;
unsigned long fg, bg;
{
#define TTY_CAPABLE_P_TRY(cap, TS, NC_bit) \
if ((caps & (cap)) && (!(TS) || !MAY_USE_WITH_COLORS_P(NC_bit))) \
return 0;
TTY_CAPABLE_P_TRY (TTY_CAP_INVERSE, TS_standout_mode, NC_REVERSE);
TTY_CAPABLE_P_TRY (TTY_CAP_UNDERLINE, TS_enter_underline_mode, NC_UNDERLINE);
TTY_CAPABLE_P_TRY (TTY_CAP_BOLD, TS_enter_bold_mode, NC_BOLD);
TTY_CAPABLE_P_TRY (TTY_CAP_DIM, TS_enter_dim_mode, NC_DIM);
TTY_CAPABLE_P_TRY (TTY_CAP_BLINK, TS_enter_blink_mode, NC_BLINK);
TTY_CAPABLE_P_TRY (TTY_CAP_ALT_CHARSET, TS_enter_alt_charset_mode, NC_ALT_CHARSET);
/* We can do it! */
return 1;
}
/* Return non-zero if the terminal is capable to display colors. */
DEFUN ("tty-display-color-p", Ftty_display_color_p, Stty_display_color_p,
......
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