feat: simple overlay and window modes with intention setting

src/window_state.c

@@ -0,0 +1,54 @@
+#include "window_state.h"
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+struct state *s = NULL;
+
+#define INTENTION_MAX_SIZE 2048
+
+struct state {
+  Mode mode;
+  char intention[INTENTION_MAX_SIZE];
+};
+
+void init_window_state() {
+  s = malloc(sizeof(struct state));
+  s->mode = WINDOW;
+
+  memset(s->intention, 0, sizeof(s->intention));
+}
+
+void cleanup_window_state() {
+  if (!s) {
+    return;
+  }
+  free(s);
+  s = NULL;
+}
+
+void set_intention(char *intention) {
+  assert(s);
+  
+  strncpy(s->intention, intention, sizeof(s->intention));
+  s->intention[sizeof(s->intention) - 1] = '\0';
+}
+
+char *get_intention() {
+  assert(s);
+  return s->intention;
+}
+
+size_t get_intention_size() {
+  assert(s);
+  return sizeof(s->intention);
+}
+
+Mode get_mode() {
+  assert(s);
+  return s->mode;
+}
+
+void set_mode(Mode new_mode) {
+  s->mode = new_mode;
+}