prompt: concentrate manipulations of 'statusbar_x' into a single file

src/files.c

@@ -1112,18 +1112,7 @@ void do_insertfile(void)
 #endif
 #ifndef NANO_TINY
 			if (func == flip_pipe) {
-				/* Remove or add the pipe character at the answer's head. */
-				if (answer[0] == '|') {
-					charmove(answer, answer + 1, strlen(answer) + 1);
-					if (statusbar_x > 0)
-						statusbar_x--;
-				} else {
-					answer = charealloc(answer, strlen(answer) + 2);
-					charmove(answer + 1, answer, strlen(answer) + 1);
-					answer[0] = '|';
-					statusbar_x++;
-				}
-
+				add_or_remove_pipe_symbol_from_answer();
 				given = mallocstrcpy(given, answer);
 				continue;
 			}

src/global.c

@@ -152,8 +152,6 @@ char *word_chars = NULL;
 
 char *answer = NULL;
 		/* The answer string used by the statusbar prompt. */
-size_t statusbar_x = HIGHEST_POSITIVE;
-		/* The cursor position in answer. */
 
 ssize_t tabsize = -1;
 		/* The width of a tab in spaces.  The default is set in main(). */

src/prompt.c

@@ -25,6 +25,8 @@
 
 static char *prompt = NULL;
 		/* The prompt string used for statusbar questions. */
+static size_t statusbar_x = HIGHEST_POSITIVE;
+		/* The cursor position in answer. */
 
 #ifdef ENABLE_MOUSE
 /* Handle a mouse click on the statusbar prompt or the shortcut list. */
@@ -417,6 +419,23 @@ void update_the_statusbar(void)
 	wnoutrefresh(bottomwin);
 }
 
+#ifndef NANO_TINY
+/* Remove or add the pipe character at the answer's head. */
+void add_or_remove_pipe_symbol_from_answer(void)
+{
+	if (answer[0] == '|') {
+		charmove(answer, answer + 1, strlen(answer) + 1);
+		if (statusbar_x > 0)
+			statusbar_x--;
+	} else {
+		answer = charealloc(answer, strlen(answer) + 2);
+		charmove(answer + 1, answer, strlen(answer) + 1);
+		answer[0] = '|';
+		statusbar_x++;
+	}
+}
+#endif
+
 /* Get a string of input at the statusbar prompt. */
 functionptrtype acquire_an_answer(int *actual, bool allow_tabs,
 		bool allow_files, bool *listed, filestruct **history_list,

src/proto.h

@@ -124,7 +124,6 @@ extern char *quoteerr;
 extern char *word_chars;
 
 extern char *answer;
-extern size_t statusbar_x;
 
 extern ssize_t tabsize;
 
@@ -465,6 +464,7 @@ size_t statusbar_xplustabs(void);
 size_t get_statusbar_page_start(size_t start_col, size_t column);
 void reinit_statusbar_x(void);
 void update_the_statusbar(void);
+void add_or_remove_pipe_symbol_from_answer(void);
 int do_prompt(bool allow_tabs, bool allow_files,
 		int menu, const char *curranswer, filestruct **history_list,
 		void (*refresh_func)(void), const char *msg, ...);