Add feature detection for A_ITALIC

Doc/cmus.txt

@@ -1293,7 +1293,7 @@ the other attributes will be used.
 
 `underline` underlines the text.
 
-`italic` makes the text italic.
+`italic` makes the text italic (not supported on all ncurses versions).
 
 `blink` makes the text blink.
 

configure

@@ -156,13 +156,17 @@ check_rtsched()
 	return 0
 }
 
-ncurses_code="
+ncurses_include="
 #if defined(__sun__) || defined(__CYGWIN__)
 #include <termios.h>
 #include <ncurses.h>
 #else
 #include <curses.h>
 #endif
+"
+
+ncurses_code="
+$ncurses_include
 
 int main(void)
 {
@@ -209,6 +213,16 @@ check_ncurses()
 	check_function "use_default_colors" $NCURSES_CFLAGS $NCURSES_LIBS
 	HAVE_USE_DEFAULT_COLORS=`test $? -ne 0 ; echo $?`
 
+	msg_checking "for A_ITALIC"
+	if try_compile_link "$ncurses_include int main(int argc, char *argv[]) { unsigned long x = A_ITALIC; return !!x; }" $NCURSES_CFLAGS $NCURSES_LIBS
+	then
+		msg_result yes
+		HAVE_ITALIC="1"
+	else
+		msg_result no
+		HAVE_ITALIC="0"
+	fi
+
 	return 0
 }
 
@@ -656,7 +670,7 @@ config_header config/tremor.h CONFIG_TREMOR
 config_header config/modplug.h MODPLUG_API_8
 config_header config/mpc.h MPC_SV8
 config_header config/mp4.h USE_MPEG4IP
-config_header config/curses.h HAVE_RESIZETERM HAVE_USE_DEFAULT_COLORS
+config_header config/curses.h HAVE_RESIZETERM HAVE_USE_DEFAULT_COLORS HAVE_ITALIC
 config_header config/ffmpeg.h HAVE_FFMPEG_AVCODEC_H USE_FALLBACK_IP
 config_header config/utils.h HAVE_BYTESWAP_H
 config_header config/iconv.h HAVE_ICONV

options.c

@@ -41,6 +41,9 @@
 #include "debug.h"
 #include "discid.h"
 #include "mpris.h"
+#ifdef HAVE_CONFIG
+#include "config/curses.h"
+#endif
 
 #include <stdio.h>
 #include <errno.h>
@@ -1388,8 +1391,10 @@ static void get_attr(void *data, char *buf, size_t size)
 		blink = "blink|";
 	if (attr & A_BOLD)
 		bold = "bold|";
+	#if HAVE_ITALIC
 	if (attr & A_ITALIC)
 		italic = "italic|";
+	#endif
 
 	size_t len = snprintf(buf, size, "%s%s%s%s%s%s",
 			standout, underline, reverse, blink, bold, italic);
@@ -1422,8 +1427,10 @@ static void set_attr(void *data, const char *buf)
 				attr |= A_BLINK;
 			else if (strcmp(current, "bold") == 0)
 				attr |= A_BOLD;
+			#if HAVE_ITALIC
 			else if (strcmp(current, "italic") == 0)
 				attr |= A_ITALIC;
+			#endif
 
 			free(current);