sbbs_t::center() and thusly JS console.center() now accepts an optional

"width" argument (in columns), defaults the user's current screen column-width
but you can now over-ride this value when an additional/optional argument.
Also, center() now clears-to-EOL before sending the CRLF to the terminal.
Hopefully this doesn't mess up anyone's existing use of center().

src/sbbs3/con_out.cpp

@@ -746,18 +746,22 @@ void sbbs_t::inc_column(int count)
 	}
 }
 
-void sbbs_t::center(char *instr)
+void sbbs_t::center(char *instr, unsigned int columns)
 {
 	char str[256];
 	int i,j;
 
+	if(columns < 1)
+		columns = cols;
+
 	SAFECOPY(str,instr);
 	truncsp(str);
 	j=bstrlen(str);
-	if(j < cols)
-		for(i=0;i<(cols-j)/2;i++)
+	if(j < columns)
+		for(i=0;i<(columns-j)/2;i++)
 			outchar(' ');
 	bputs(str);
+	cleartoeol();
 	newline();
 }
 

src/sbbs3/js_console.cpp

@@ -1445,6 +1445,7 @@ js_center(JSContext *cx, uintN argc, jsval *arglist)
     JSString*	str;
 	sbbs_t*		sbbs;
 	char*		cstr;
+	int32		cols = 0;
 	jsrefcount	rc;
 
 	if((sbbs=(sbbs_t*)js_GetClassPrivate(cx, JS_THIS_OBJECT(cx, arglist), &js_console_class))==NULL)
@@ -1456,11 +1457,16 @@ js_center(JSContext *cx, uintN argc, jsval *arglist)
 	if (!str)
 		return(JS_FALSE);
 
+	if(argc > 1) {
+		if(!JS_ValueToInt32(cx, argv[1], &cols))
+			return JS_FALSE;
+	}
+
 	JSSTRING_TO_MSTRING(cx, str, cstr, NULL);
 	if(cstr==NULL)
 		return JS_FALSE;
 	rc=JS_SUSPENDREQUEST(cx);
-	sbbs->center(cstr);
+	sbbs->center(cstr, cols);
 	free(cstr);
 	JS_RESUMEREQUEST(cx, rc);
     return(JS_TRUE);
@@ -2033,8 +2039,8 @@ static jsSyncMethodSpec js_console_functions[] = {
 		"When <tt>P_WORDWRAP</tt> mode flag is specified, <i>orig_columns</i> specifies the original text column width, if known")
 	,310
 	},
-	{"center",			js_center,			1, JSTYPE_VOID,		JSDOCSTR("text")
-	,JSDOCSTR("display a string centered on the screen")
+	{"center",			js_center,			1, JSTYPE_VOID,		JSDOCSTR("text [,width]")
+	,JSDOCSTR("display a string centered on the screen, with an optionally-specified screen width (in columns)")
 	,310
 	},
 	{"wide",			js_wide,			1, JSTYPE_VOID,		JSDOCSTR("text")

src/sbbs3/sbbs.h

@@ -734,7 +734,7 @@ public:
 	int		outchar(enum unicode_codepoint, char cp437_fallback);
 	int		outchar(enum unicode_codepoint, const char* cp437_fallback = NULL);
 	void	inc_column(int count);
-	void	center(char *str);
+	void	center(char *str, unsigned int columns = 0);
 	void	wide(const char*);
 	void	clearline(void);
 	void	cleartoeol(void);