X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/e0f712ba55fa0d073f6ab93606e428f61fc7caf2..2afd5e90eb946a0e70547e56a4c705d7d0d4cb7f:/src/term.c

diff --git a/src/term.c b/src/term.c
index c2bac22d60..3add820421 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1,5 +1,5 @@
 /* Terminal control module for terminals described by TERMCAP
-   Copyright (C) 1985, 86, 87, 93, 94, 95, 98, 2000, 2001
+   Copyright (C) 1985, 86, 87, 93, 94, 95, 98, 2000, 2001, 2002
    Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
@@ -374,7 +374,7 @@ int max_frame_width;
 
 int max_frame_height;
 
-int costs_set = 0;		/* Nonzero if costs have been calculated. */
+static int costs_set;	  /* Nonzero if costs have been calculated. */
 
 int insert_mode;			/* Nonzero when in insert mode.  */
 int standout_mode;			/* Nonzero when in standout mode.  */
@@ -810,7 +810,8 @@ encode_terminal_code (src, dst, src_len, dst_len, consumed)
   struct glyph *src_start = src, *src_end = src + src_len;
   unsigned char *dst_start = dst, *dst_end = dst + dst_len;
   register GLYPH g;
-  unsigned char workbuf[MAX_MULTIBYTE_LENGTH], *buf;
+  unsigned char workbuf[MAX_MULTIBYTE_LENGTH];
+  const unsigned char *buf;
   int len;
   register int tlen = GLYPH_TABLE_LENGTH;
   register Lisp_Object *tbase = GLYPH_TABLE_BASE;
@@ -1987,6 +1988,32 @@ 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,