Merge branch 'backend-selection' into main

- Implement runtime backend selection (Wayland, X11, Cocoa)
- Add native X11 backend with clipboard, keyboard, mouse, and placement
- Integrate multi-backend integration tests running under Weston and Xwayland
- Retain zero-hole struct packing, branchless ALU/LUT primitives, and paced event loop

1 files changed, 16 insertions, 16 deletions

diff --git a/src/wayland/keyboard.c b/src/wayland/keyboard.c
index 6045962..6bdd58c 100644
--- a/src/wayland/keyboard.c
+++ b/src/wayland/keyboard.c
@@ -112,13 +112,13 @@ static void keyboard_keymap(void *data, struct wl_keyboard *keyboard,
     }
 }
 
-static void keyboard_reset_keys(struct seat *s, struct yasl_surface *w)
+static void keyboard_reset_keys(struct seat *s, struct wayland_surface *w)
 {
     (void)w;
     keyboard_repeat_stop(s);
 }
 
-bool conn_keyboard_on(const struct yasl_display *c, const struct yasl_surface *w,
+bool conn_keyboard_on(const struct wayland_display *c, const struct wayland_surface *w,
                       const struct seat *except)
 {
     for (const struct seat *s = c->seats; s; s = s->next)
@@ -127,11 +127,11 @@ bool conn_keyboard_on(const struct yasl_display *c, const struct yasl_surface *w
     return false;
 }
 
-static void push_focus(struct yasl_surface *w, bool focused)
+static void push_focus(struct wayland_surface *w, bool focused)
 {
     struct yasl_input_event ev = {
         .kind = YASL_INPUT_FOCUS,
-        .surface = w,
+        .surface = &w->base,
         .focus = { .focused = focused },
     };
     input_queue_push(&w->input, &ev);
@@ -142,7 +142,7 @@ static void keyboard_enter(void *data, struct wl_keyboard *keyboard,
 {
     (void)keyboard; (void)serial; (void)keys;
     struct seat *s = data;
-    struct yasl_surface *w = surface_root(conn_surface_for(s->conn, surface));
+    struct wayland_surface *w = surface_root(conn_surface_for(s->conn, surface));
     bool same_window = w && w == s->focus_leaving;
     if (same_window)
         s->focus_leaving = NULL;
@@ -159,7 +159,7 @@ static void keyboard_enter(void *data, struct wl_keyboard *keyboard,
 
 static void seat_settle_focus(struct seat *s)
 {
-    struct yasl_surface *w = s->focus_leaving;
+    struct wayland_surface *w = s->focus_leaving;
     if (!w)
         return;
     s->focus_leaving = NULL;
@@ -167,7 +167,7 @@ static void seat_settle_focus(struct seat *s)
         push_focus(w, false);
 }
 
-void keyboard_settle_focus(struct yasl_display *c)
+void keyboard_settle_focus(struct wayland_display *c)
 {
     for (struct seat *s = c->seats; s; s = s->next)
         seat_settle_focus(s);
@@ -178,7 +178,7 @@ static void keyboard_leave(void *data, struct wl_keyboard *keyboard,
 {
     (void)keyboard; (void)serial; (void)surface;
     struct seat *s = data;
-    struct yasl_surface *w = s->keyboard_focus;
+    struct wayland_surface *w = s->keyboard_focus;
     s->keyboard_focus = NULL;
     if (!w) return;
     keyboard_reset_keys(s, w);
@@ -231,7 +231,7 @@ static struct yasl_key_event xkb_key_event(struct seat *s, uint32_t key,
     return k;
 }
 
-static bool keyboard_dispatch_key(struct seat *s, struct yasl_surface *w, uint32_t key,
+static bool keyboard_dispatch_key(struct seat *s, struct wayland_surface *w, uint32_t key,
                                   enum yasl_key_action action)
 {
     if (!s->xkb_state || !w->cbs) return false;
@@ -239,7 +239,7 @@ static bool keyboard_dispatch_key(struct seat *s, struct yasl_surface *w, uint32
     struct yasl_key_event k = xkb_key_event(s, key, action);
     struct yasl_input_event ev = {
         .kind = YASL_INPUT_KEY,
-        .surface = w,
+        .surface = &w->base,
         .key = k,
     };
     input_queue_push(&w->input, &ev);
@@ -251,7 +251,7 @@ static void keyboard_key(void *data, struct wl_keyboard *keyboard,
 {
     (void)keyboard; (void)time;
     struct seat *s = data;
-    struct yasl_surface *w = s->keyboard_focus;
+    struct wayland_surface *w = s->keyboard_focus;
     if (!w) return;
     seat_note_input(s, serial);
     if (state == WL_KEYBOARD_KEY_STATE_RELEASED) {
@@ -276,7 +276,7 @@ static int keyboard_repeat_ready(int fd, short revents, void *data)
     uint64_t count;
     if (!(revents & POLLIN) || read(fd, &count, sizeof(count)) != sizeof(count)) return 0;
 
-    struct yasl_surface *w = s->keyboard_focus;
+    struct wayland_surface *w = s->keyboard_focus;
     if (!w) {
         keyboard_repeat_stop(s);
         return 0;
@@ -353,12 +353,12 @@ int seat_modifiers(const struct seat *s)
            (mod_index_active(s, s->mod_super) * YASL_MOD_SUPER);
 }
 
-int yasl_display_modifiers(const struct yasl_display *c)
+int wayland_display_modifiers(const struct wayland_display *c)
 {
     return c ? seat_modifiers(conn_active_seat(c)) : 0;
 }
 
-void yasl_display_copy(struct yasl_display *c, enum yasl_selection sel, const char *text)
+void wayland_display_copy(struct wayland_display *c, enum yasl_selection sel, const char *text)
 {
     struct seat *s = c ? conn_active_seat(c) : NULL;
     if (!s || !s->clipboard)
@@ -369,7 +369,7 @@ void yasl_display_copy(struct yasl_display *c, enum yasl_selection sel, const ch
         clipboard_copy(s->clipboard, text, s->input_serial);
 }
 
-void yasl_display_paste(struct yasl_display *c, enum yasl_selection sel, struct yasl_surface *target)
+void wayland_display_paste(struct wayland_display *c, enum yasl_selection sel, struct wayland_surface *target)
 {
     struct seat *s = c ? conn_active_seat(c) : NULL;
     if (!s || !s->clipboard)
@@ -381,7 +381,7 @@ void yasl_display_paste(struct yasl_display *c, enum yasl_selection sel, struct
         clipboard_paste(s->clipboard);
 }
 
-bool yasl_surface_input_poll(struct yasl_surface *w, struct yasl_input_event *ev)
+bool wayland_surface_input_poll(struct wayland_surface *w, struct yasl_input_event *ev)
 {
     return w && ev && input_queue_pop(&w->input, ev);
 }