Unify core and runner events into struct yasl_event

The core input queue and the yasl_run() runner each had their own event
type, and the runner translated one into the other. Both now share
struct yasl_event in <yasl/yasl.h>: yasl_surface_poll_event() returns the
same events the app event callback receives, so the runner forwards them
unchanged.

Pointer input becomes POINTER_DOWN/UP/MOTION/SCROLL/LEAVE with a named
yasl_pointer_button and a motion delta computed in the input queue. TEXT,
PASTE and DROP share one text payload, scale changes fold into
WINDOW_RESIZE, and every event carries a monotonic time_ns.
yasl_surface_set_mouse_mode() is replaced by
yasl_surface_set_pointer_mode(); no backend implements relative mode yet.

The export check now only counts YASL_API declarations, so function
pointer fields returning enum yasl_app_result are not mistaken for
exports.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/src/common/input.h b/src/common/input.h
index d7264f6..ffd1663 100644
--- a/src/common/input.h
+++ b/src/common/input.h
@@ -5,15 +5,23 @@
 
 /* Each queued string and the last successfully polled string are owned here. */
 struct input_queue {
-    struct yasl_input_event *events;
+    struct yasl_event *events;
     size_t head, count, capacity;
     char *last_text;
+    /* Last pointer position, for computing absolute-mode motion deltas. */
+    struct yasl_vector2i last_pos;
+    bool has_last_pos;
+    /* Set by backends while YASL_POINTER_RELATIVE is active: keep pushed deltas. */
+    bool relative;
     struct yasl_surface *reset_surface;
     bool reset_pending;
 };
 
-bool input_queue_push(struct input_queue *q, const struct yasl_input_event *ev);
-bool input_queue_pop(struct input_queue *q, struct yasl_input_event *ev);
+/* Copies text payloads and stamps time_ns when zero. Unless q->relative is set,
+ * POINTER_MOTION delta is computed from the previous position; otherwise the
+ * backend-supplied delta is kept. Leave and reset clear the position history. */
+bool input_queue_push(struct input_queue *q, const struct yasl_event *ev);
+bool input_queue_pop(struct input_queue *q, struct yasl_event *ev);
 void input_queue_clear(struct input_queue *q);
 
 #endif