kconfig: Add print_title helper in lxdialog

Simplify check for long title and use a helper function in util.c

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/lxdialog/checklist.c

@@ -158,20 +158,7 @@ int dialog_checklist(const char *title, const char *prompt, int height,
 	wattrset(dialog, dialog_attr);
 	waddch(dialog, ACS_RTEE);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
-
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
+	print_title(dialog, title, width);
 
 	wattrset(dialog, dialog_attr);
 	print_autowrap(dialog, prompt, width - 2, 1, 3);

scripts/lxdialog/dialog.h

@@ -145,6 +145,7 @@ void dialog_clear(void);
 void color_setup(void);
 void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x);
 void print_button(WINDOW * win, const char *label, int y, int x, int selected);
+void print_title(WINDOW *dialog, const char *title, int width);
 void draw_box(WINDOW * win, int y, int x, int height, int width, chtype box,
 	      chtype border);
 void draw_shadow(WINDOW * win, int y, int x, int height, int width);

scripts/lxdialog/inputbox.c

@@ -66,20 +66,7 @@ int dialog_inputbox(const char *title, const char *prompt, int height, int width
 	wattrset(dialog, dialog_attr);
 	waddch(dialog, ACS_RTEE);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
-
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
+	print_title(dialog, title, width);
 
 	wattrset(dialog, dialog_attr);
 	print_autowrap(dialog, prompt, width - 2, 1, 3);

scripts/lxdialog/menubox.c

@@ -189,20 +189,7 @@ int dialog_menu(const char *title, const char *prompt, int height, int width,
 	wbkgdset(dialog, dialog_attr & A_COLOR);
 	waddch(dialog, ACS_RTEE);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
-
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
+	print_title(dialog, title, width);
 
 	wattrset(dialog, dialog_attr);
 	print_autowrap(dialog, prompt, width - 2, 1, 3);

scripts/lxdialog/msgbox.c

@@ -42,20 +42,8 @@ int dialog_msgbox(const char *title, const char *prompt, int height, int width,
 
 	draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
+	print_title(dialog, title, width);
 
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
 	wattrset(dialog, dialog_attr);
 	print_autowrap(dialog, prompt, width - 2, 1, 2);
 

scripts/lxdialog/textbox.c

@@ -103,20 +103,8 @@ int dialog_textbox(const char *title, const char *file, int height, int width)
 	wbkgdset(dialog, dialog_attr & A_COLOR);
 	waddch(dialog, ACS_RTEE);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
+	print_title(dialog, title, width);
 
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
 	print_button(dialog, " Exit ", height - 2, width / 2 - 4, TRUE);
 	wnoutrefresh(dialog);
 	getyx(dialog, cur_y, cur_x);	/* Save cursor position */

scripts/lxdialog/util.c

@@ -177,6 +177,20 @@ void end_dialog(void)
 	endwin();
 }
 
+/* Print the title of the dialog. Center the title and truncate
+ * tile if wider than dialog (- 2 chars).
+ **/
+void print_title(WINDOW *dialog, const char *title, int width)
+{
+	if (title) {
+		int tlen = MIN(width - 2, strlen(title));
+		wattrset(dialog, title_attr);
+		mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
+		mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
+		waddch(dialog, ' ');
+	}
+}
+
 /*
  * Print a string of text in a window, automatically wrap around to the
  * next line if the string is too long to fit on one line. Newline

scripts/lxdialog/yesno.c

@@ -61,20 +61,7 @@ int dialog_yesno(const char *title, const char *prompt, int height, int width)
 	wattrset(dialog, dialog_attr);
 	waddch(dialog, ACS_RTEE);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
-
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
+	print_title(dialog, title, width);
 
 	wattrset(dialog, dialog_attr);
 	print_autowrap(dialog, prompt, width - 2, 1, 3);