feat(tray): 实现 tray_api_t 定义的所有接口

src/backend/x11/internal.h

@@ -9,6 +9,7 @@
 
 #include "common/window.h"
 #include "interface/event.h"
+#include "interface/tray.h"
 
 #define EWMH_ATOMS(X)                  \
   X(_NET_WM_NAME)                      \
@@ -86,6 +87,18 @@ typedef enum cursor_t {
   ZDWM_CURSOR_COUNT,
 } cursor_t;
 
+typedef struct tray_host_t {
+  bool enabled;
+  xcb_window_t host_window;
+  xcb_window_t container;
+  int32_t icon_size;
+  size_t icon_count;
+  tray_icons_change_cb_t icon_change_cb;
+  void *cb_user_data;
+} tray_host_t;
+
+extern const tray_api_t tray_api;
+
 typedef struct backend_t {
   xcb_key_symbols_t *key_symbols;
   xcb_connection_t *conn;
@@ -109,6 +122,8 @@ typedef struct backend_t {
   window_list_t unmap;
   window_list_t map;
   window_list_t kill;
+
+  tray_host_t tray;
 } backend_t;
 
 bool populate_window_event(

src/backend/x11/tray.c

@@ -0,0 +1,59 @@
+#include "interface/tray.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <zdwm/types.h>
+
+#include "interface/types.h"
+#include "internal.h"
+
+static window_id_t tray_host_window(void *handle) {
+  backend_t *backend = handle;
+  if (backend == nullptr || !backend->tray.enabled) {
+    return ZDWM_WINDOW_ID_INVALID;
+  }
+
+  return backend->tray.host_window;
+}
+
+static size_t tray_icon_count(void *handle) {
+  backend_t *backend = handle;
+  if (backend == nullptr || !backend->tray.enabled) return 0;
+
+  return backend->tray.icon_count;
+}
+
+static int32_t tray_icon_size(void *handle) {
+  backend_t *backend = handle;
+  if (backend == nullptr || !backend->tray.enabled) return 0;
+
+  return backend->tray.icon_size;
+}
+
+static void tray_place(void *handle, int32_t x) {
+  backend_t *backend = handle;
+  if (backend == nullptr || !backend->tray.enabled) return;
+
+  auto conn = backend->conn;
+  auto tray = &backend->tray;
+  uint16_t value_mask = XCB_CONFIG_WINDOW_X;
+  xcb_configure_window_value_list_t value_list = {.x = x};
+  xcb_configure_window_aux(conn, tray->container, value_mask, &value_list);
+}
+
+static void
+tray_set_listeners(void *handle, tray_icons_change_cb_t cb, void *user_data) {
+  backend_t *backend = handle;
+  if (backend == nullptr) return;
+
+  backend->tray.icon_change_cb = cb;
+  backend->tray.cb_user_data = user_data;
+}
+
+const tray_api_t tray_api = {
+  .host_window = tray_host_window,
+  .icon_count = tray_icon_count,
+  .icon_size = tray_icon_size,
+  .place = tray_place,
+  .set_listener = tray_set_listeners,
+};