Add region mode (for inline TUIs) (attempt 2)

codegen.sh

@@ -52,6 +52,7 @@ read -r -d '' terminfo_funcs <<'EOD'
     rmkx  EXIT_KEYPAD
     dim   DIM
     invis INVISIBLE
+    ed    CLEAR_EOS
 EOD
 
 read -r -d '' extra_keys <<'EOD'

demo/keyboard.c

@@ -699,7 +699,11 @@ int main(int argc, char **argv)
 
     setlocale(LC_ALL, "");
 
-    ret = tb_init();
+    if (argc >= 2 && atoi(argv[1]) > 0) {
+        ret = tb_init_ex(1, TB_INIT_REGION, 24);
+    } else {
+        ret = tb_init();
+    }
     if (ret) {
         fprintf(stderr, "tb_init() failed with error code %d\n", ret);
         return 1;

demo/region.c

@@ -0,0 +1,34 @@
+// cc -DTB_IMPL -I.. region.c -o region
+#include <termbox2.h>
+
+int main(int argc, char **argv) {
+    int sel, y, h, done;
+
+    tb_init_ex(1, TB_INIT_REGION, argc >= 2 ? atoi(argv[1]) : 10);
+
+    done = 0;
+    sel = 0;
+    while (!done) {
+        tb_clear();
+        for (y = 0; y < tb_height(); y++) {
+            tb_printf(0, y, 0, y == sel ? TB_REVERSE : 0, "Item %d", y);
+        }
+        tb_present();
+
+        struct tb_event ev;
+        tb_poll_event(&ev);
+        h = tb_height();
+
+        switch (ev.key) {
+            case TB_KEY_ARROW_UP:   --sel; if (sel <  0) sel = 0;      break;
+            case TB_KEY_ARROW_DOWN: ++sel; if (sel >= h) sel = h - 1;  break;
+            case TB_KEY_ENTER:      done = 1;                          break;
+            case TB_KEY_PGUP:       tb_region(h + 1);                  break;
+            case TB_KEY_PGDN:       tb_region(h - 1);                  break;
+        }
+    }
+    tb_shutdown();
+
+    printf("You picked item %d\n", sel);
+    return 0;
+}