Wayland: fix GL thread races, reconnect ordering and sizing bugs

- GL swaps on a rendering thread no longer touch frame callbacks or
  presentation feedback. They set a per-surface flag and wake the loop; the
  owner thread arms both at its next flush and commits, so the frame callback
  fires without waiting for the application's next swap.
- Clear the offline flag only after the reconnect rebuild succeeds, and not
  when the connection was lost again during it.
- make_current fails with ENOTCONN for a window without a context. Detaching
  is a no-op when nothing is current or the EGL display is gone.
- Window move, resize, window menu and drag start need a pointer button or
  tablet tip that is still held; otherwise they fail with ESTALE and use that
  press's serial. Popups fail with ESTALE without an input serial and with
  ENOTCONN while the display is lost.
- An oversized device size shrinks to the buffer limits, keeping the aspect
  ratio, instead of closing the window.
- FIXED_SIZE windows pin xdg min and max on every set_size. The 64px minimum
  applies only to compositor-suggested sizes, not to application sizes.
- The keyboard-enter serial becomes the input serial. Clipboard copy with no
  keyboard focus fails with ESTALE.
- Relative-pointer windows relock after a reconnect rebuild.
- errno: EBUSY for an active drag, ENOTSUP for place_under_pointer and for GL
  without EGL, EINVAL for drag carry without a drag.
- Default window title and app ID are "YASL".
- Pointer motion and button events carry unrounded device-pixel positions in
  precise_x/precise_y with precise_position set.

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

1 files changed, 7 insertions, 5 deletions

diff --git a/src/platform/wayland/keyboard.c b/src/platform/wayland/keyboard.c
index 9637341..cf6d56c 100644
--- a/src/platform/wayland/keyboard.c
+++ b/src/platform/wayland/keyboard.c
@@ -144,7 +144,7 @@ static void push_focus(struct wayland_surface *w, bool focused)
 static void keyboard_enter(void *data, struct wl_keyboard *keyboard,
         uint32_t serial, struct wl_surface *surface, struct wl_array *keys)
 {
-    (void)keyboard; (void)serial; (void)keys;
+    (void)keyboard; (void)keys;
     struct seat *s = data;
     struct wayland_surface *w = surface_root(surface ?
         (struct wayland_surface *)wl_surface_get_user_data(surface) : NULL);
@@ -155,6 +155,8 @@ static void keyboard_enter(void *data, struct wl_keyboard *keyboard,
         s->keyboard_focus = NULL;
         return;
     }
+    /* The enter serial is a valid input serial, e.g. for set_selection. */
+    seat_note_input(s, serial);
     bool focused = conn_keyboard_on(s->conn, w, s);
     s->keyboard_focus = w;
     keyboard_reset_keys(s, w);
@@ -433,12 +435,12 @@ bool wayland_display_copy_text(struct wayland_display *c, enum yasl_private_sele
         errno = EINVAL;
         return false;
     }
-    if (!s || !s->clipboard) {
-        errno = ENOTSUP;
+    if (!s || !s->keyboard_focus || !s->input_serial) {
+        errno = ESTALE;
         return false;
     }
-    if (!s->input_serial) {
-        errno = EAGAIN;
+    if (!s->clipboard) {
+        errno = ENOTSUP;
         return false;
     }
     errno = 0;