Fix BadMatch error for wrapper window

The wrapper window must define a border background if the depth doesn't
match the parent window.

src/x11/tray_client.cpp

@@ -9,33 +9,41 @@
 
 POLYBAR_NS
 
-// TODO create wrapper window
 tray_client::tray_client(const logger& log, connection& conn, xcb_window_t tray, xcb_window_t win, size s)
     : m_log(log), m_connection(conn), m_client(win), m_size(s) {
   auto geom = conn.get_geometry(win);
   auto attrs = conn.get_window_attributes(win);
-  int depth = geom->depth;
+  int client_depth = geom->depth;
-  xcb_visualid_t visual = attrs->visual;
+  auto client_visual = attrs->visual;
-  m_log.trace("tray(%s): depth: %u, width: %u, height: %u, visual: 0x%x", conn.id(win), depth, geom->width, geom->height, visual);
+  auto client_colormap = attrs->colormap;
 
+  m_log.trace("tray(%s): depth: %u, width: %u, height: %u", conn.id(win), client_depth, geom->width, geom->height);
+
+  /*
+   * Create embedder window for tray icon
+   *
+   * The embedder window inherits the depth, visual and color map from the icon window in order for reparenting to
+   * always work, even if the icon window uses ParentRelative for some of its pixmaps (back pixmap or border pixmap).
+   */
   // clang-format off
   m_wrapper = winspec(conn)
     << cw_size(s.h, s.w)
     << cw_pos(0, 0)
-    // TODO fix BadMatch error for redshift-gtk window
+    << cw_depth(client_depth)
-    // << cw_depth(depth)
+    << cw_visual(client_visual)
-    // << cw_visual(visual)
     << cw_parent(tray)
+    << cw_class(XCB_WINDOW_CLASS_INPUT_OUTPUT)
     // TODO add proper pixmap
     << cw_params_back_pixmap(XCB_PIXMAP_NONE)
-    // << cw_class(XCB_WINDOW_CLASS_INPUT_OUTPUT)
+    // The X server requires the border pixel to be defined if the depth doesn't match the parent window
+    << cw_params_border_pixel(conn.screen()->black_pixel)
     << cw_params_backing_store(XCB_BACKING_STORE_WHEN_MAPPED)
+    << cw_params_save_under(true)
     << cw_params_event_mask(XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
         | XCB_EVENT_MASK_PROPERTY_CHANGE
         | XCB_EVENT_MASK_STRUCTURE_NOTIFY
         | XCB_EVENT_MASK_EXPOSURE)
-    // << cw_flush(false);
+    << cw_params_colormap(client_colormap)
-    // TODO Make unchecked
     << cw_flush(true);
   // clang-format on
 }

src/x11/tray_manager.cpp

@@ -475,13 +475,14 @@ void tray_manager::create_window() {
   auto win = winspec(m_connection)
     << cw_size(calculate_w(), calculate_h())
     << cw_pos(calculate_x(calculate_w()), calculate_y())
+    << cw_depth(XCB_COPY_FROM_PARENT)
+    << cw_visual(XCB_COPY_FROM_PARENT)
+    << cw_params_colormap(XCB_COPY_FROM_PARENT)
     << cw_class(XCB_WINDOW_CLASS_INPUT_OUTPUT)
     << cw_params_backing_store(XCB_BACKING_STORE_WHEN_MAPPED)
     << cw_params_event_mask(XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
         |XCB_EVENT_MASK_STRUCTURE_NOTIFY
         |XCB_EVENT_MASK_EXPOSURE)
-    // TODO
-    // << cw_params_override_redirect(true)
     << cw_parent(m_opts.bar_window);
   // clang-format on
 
@@ -700,6 +701,7 @@ void tray_manager::track_selection_owner(xcb_window_t owner) {
 void tray_manager::process_docking_request(xcb_window_t win) {
   m_log.info("Processing docking request from '%s' (%s)", ewmh_util::get_wm_name(win), m_connection.id(win));
 
+  try {
     tray_client client(m_log, m_connection, m_tray, win, m_opts.client_size);
 
     try {
@@ -715,7 +717,6 @@ void tray_manager::process_docking_request(xcb_window_t win) {
           client.get_xembed().get_flags(), client.get_xembed().is_mapped() ? "true" : "false");
     }
 
-  try {
     const uint32_t mask = XCB_CW_EVENT_MASK;
     const uint32_t value = XCB_EVENT_MASK_PROPERTY_CHANGE | XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 
@@ -746,13 +747,13 @@ void tray_manager::process_docking_request(xcb_window_t win) {
       m_connection.map_window_checked(client.client());
       m_connection.map_window_checked(client.embedder());
     }
+
+    m_clients.emplace_back(std::move(client));
   } catch (const std::exception& err) {
     m_log.err("Failed to setup tray client '%s' (%s) removing... (%s)", ewmh_util::get_wm_name(win),
         m_connection.id(win), err.what());
     return;
   }
-
-  m_clients.emplace_back(std::move(client));
 }
 
 /**
@@ -976,7 +977,8 @@ void tray_manager::handle(const evt::property_notify& evt) {
   }
 
   // React an wallpaper change, if bar has transparency
-  if (m_opts.transparent && (evt->atom == _XROOTPMAP_ID || evt->atom == _XSETROOT_ID || evt->atom == ESETROOT_PMAP_ID)) {
+  if (m_opts.transparent &&
+      (evt->atom == _XROOTPMAP_ID || evt->atom == _XSETROOT_ID || evt->atom == ESETROOT_PMAP_ID)) {
     redraw_window();
     return;
   }