Report held pointer buttons on every pointer event

Pointer events set button only on press and release, so wsap_term tracked
held buttons itself to tell a drag from a hover.

yasl_pointer_event.buttons now holds a YASL_BUTTON_BIT() mask of the buttons
held after each event. The common input queue tracks it from the DOWN and
UP events it queues, and clears it on INPUT_RESET and on allocation
failure. Wayland also clears it on leave, since the compositor sends leave
during a press only when it takes the pointer and no release follows. X11
and Cocoa keep it, because they deliver motion and the release to the
pressed window after leave.

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

1 files changed, 6 insertions, 1 deletions

diff --git a/src/common/input.h b/src/common/input.h
index ffd1663..aad5c9a 100644
--- a/src/common/input.h
+++ b/src/common/input.h
@@ -15,11 +15,16 @@ struct input_queue {
     bool relative;
     struct yasl_surface *reset_surface;
     bool reset_pending;
+    /* YASL_BUTTON_BIT() mask from pushed DOWN/UP events. */
+    uint32_t buttons;
+    /* Set by backends whose pointer leave ends any press: no release follows. */
+    bool leave_ends_press;
 };
 
 /* 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. */
+ * backend-supplied delta is kept. Leave and reset clear the position history.
+ * Pointer events get the held-button mask; reset clears it. */
 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);