Add macro to print a message

4 files changed, 10 insertions, 9 deletions

diff --git a/main.c b/main.c
index 74e283f..154fc9a 100644
--- a/main.c
+++ b/main.c
@@ -179,8 +179,7 @@ int main(int argc, char **argv) {
                       }
                       break;
             case 's':
-                      move(height + map_offset_y + 1, map_offset_x - 2); clrtoeol(); /* Clears the line */
-                      mvprintw(height + map_offset_y + 1, map_offset_x - 2, "Filename: ");
+                      message(height, "Filename: ");
                       /* TODO: figure out how to show the cursor and echo the characters */
                       curs_set(2);   /* Hide the cursor */
                       echo();      /* Don't echo characters */
@@ -189,8 +188,7 @@ int main(int argc, char **argv) {
                       noecho();      /* Don't echo characters */
                       mvgetnstr(height + map_offset_y + 1, map_offset_x - 2, filename, FILENAME_BUF_SIZE - 1);
                       map_to_bmp(map, width, height, start_pos, end_pos, path, visited, filename);
-                      move(height + map_offset_y + 1, map_offset_x - 2); clrtoeol(); /* Clears the line */
-                      mvprintw(height + map_offset_y + 1, map_offset_x - 2, "Saved to %s", filename);
+                      message(height, "Saved to %s", filename);
                       getch();
                       break;
             case 'n':
diff --git a/map.c b/map.c
index 3bd7500..57f1c65 100644
--- a/map.c
+++ b/map.c
@@ -10,8 +10,6 @@
 #include "path.h"
 #include "priority_queue.h"
 
-/* TODO: function to print a message maybe */
-
 int map_offset_x = 2;
 int map_offset_y = 1;
 
@@ -348,7 +346,7 @@ void draw_map(Map map, size_t width, size_t height, Position start, Position goa
             cur = path[cur.y][cur.x].parent;
         }
         attroff(COLOR_PAIR(PATH_COLOR));
-        mvprintw(height + map_offset_y + 1, map_offset_x - 2, "Path cost: %zu", length);
+        message(height, "Path cost: %zu", length);
     }
 
     /* Draw the start */
@@ -400,7 +398,7 @@ void print_map_out(Map map, size_t width, size_t height) {
 void map_editor(Map *map, size_t *width, size_t *height, Position *start, Position *goal) {
     clear();
     draw_map(*map, *width, *height, *start, *goal, NULL, NULL, NULL, NULL);
-    mvprintw(*height + map_offset_y + 1, map_offset_x - 2, "You've entered the map editor. 'q' to quit");
+    message(*height, "You've entered the map editor. 'q' to quit");
 
     MEVENT event;
     mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, NULL);
diff --git a/map.h b/map.h
index fef684c..e9c5bc3 100644
--- a/map.h
+++ b/map.h
@@ -6,6 +6,11 @@
 #include "path.h"
 #include "priority_queue.h"
 
+/* Prints a message at the line right below the map. Multiline messages are undefined behaviour */
+#define message(height, ...) { \
+    if (move((height) + map_offset_y + 1, map_offset_x - 2) != ERR) { clrtoeol(); /* Clear the line */\
+    mvprintw((height) + map_offset_y + 1, map_offset_x - 2, __VA_ARGS__); }}
+
 extern int map_offset_x;
 extern int map_offset_y;
 
diff --git a/path.c b/path.c
index 8145c01..e27723b 100644
--- a/path.c
+++ b/path.c
@@ -18,7 +18,7 @@ int anim(Map map, size_t width, size_t height, Position start, Position end, Pos
     static char automatic = 0;
     while (1) {
         draw_map(map, width, height, start, end, cur, NULL, visited, frontier);
-        mvprintw(height+2 + map_offset_y - 1, map_offset_x - 2, "cur: %zu %zu", cur->x, cur->y);
+        message(height, "cur: %zu %zu", cur->x, cur->y);
         if (automatic) { usleep(ANIM_DELAY_USEC); return 0; }
         switch (getch()) {
             case 'h': map_offset_x -= 2; break;