feat: output configuration

include/bar.hpp

@@ -18,7 +18,7 @@ class Bar {
   public:
     Bar(const Client&, std::unique_ptr<struct wl_output *>&&, uint32_t);
     Bar(const Bar&) = delete;
-    ~Bar() = default;
+    ~Bar();
 
     auto toggle() -> void;
 
@@ -44,6 +44,9 @@ class Bar {
     static void layerSurfaceHandleClosed(void *,
       struct zwlr_layer_surface_v1 *);
 
+    void initBar();
+    bool isValidOutput(const Json::Value &config);
+    void destroyOutput();
     auto setupConfig() -> void;
     auto setupWidgets() -> void;
     auto setupCss() -> void;

src/bar.cpp

@@ -33,8 +33,16 @@ waybar::Bar::Bar(const Client& client,
   GdkWindow *gdk_window = gtk_widget_get_window(wrap);
   gdk_wayland_window_set_use_custom_surface(gdk_window);
   surface = gdk_wayland_window_get_wl_surface(gdk_window);
+}
 
-  std::size_t layer_top = config_["layer"] == "top"
+waybar::Bar::~Bar()
+{
+  destroyOutput();
+}
+
+void waybar::Bar::initBar()
+{
+    std::size_t layer_top = config_["layer"] == "top"
     ? ZWLR_LAYER_SHELL_V1_LAYER_TOP : ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM;
   layer_surface = zwlr_layer_shell_v1_get_layer_surface(
     client.layer_shell, surface, *output, layer_top, "waybar");
@@ -43,8 +51,7 @@ waybar::Bar::Bar(const Client& client,
     .configure = layerSurfaceHandleConfigure,
     .closed = layerSurfaceHandleClosed,
   };
-  zwlr_layer_surface_v1_add_listener(layer_surface,
-    &layer_surface_listener, this);
+  zwlr_layer_surface_v1_add_listener(layer_surface, &layer_surface_listener, this);
 
   std::size_t anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
     | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
@@ -65,6 +72,17 @@ waybar::Bar::Bar(const Client& client,
   setupWidgets();
 }
 
+void waybar::Bar::destroyOutput()
+{
+  if (layer_surface != nullptr) {
+    zwlr_layer_surface_v1_destroy(layer_surface);
+  }
+  if (surface != nullptr) {
+    wl_surface_destroy(surface);
+  }
+  wl_output_destroy(*output);
+}
+
 void waybar::Bar::handleLogicalPosition(void* /*data*/,
   struct zxdg_output_v1* /*zxdg_output_v1*/, int32_t /*x*/, int32_t /*y*/)
 {
@@ -84,11 +102,49 @@ void waybar::Bar::handleDone(void* /*data*/,
   // Nothing here
 }
 
+bool waybar::Bar::isValidOutput(const Json::Value &config)
+{
+  bool found = true;
+  if (config["output"].isArray()) {
+    bool in_array = false;
+    for (auto const &output : config["output"]) {
+      if (output.isString() && output.asString() == output_name) {
+        in_array = true;
+        break;
+      }
+    }
+    found = in_array;
+  }
+  if (config["output"].isString() && config["output"].asString() != output_name) {
+    found = false;
+  }
+  return found;
+}
+
 void waybar::Bar::handleName(void* data, struct zxdg_output_v1* /*xdg_output*/,
   const char* name)
 {
 	auto o = static_cast<waybar::Bar *>(data);
   o->output_name = name;
+  bool found = true;
+  if (o->config_.isArray()) {
+    bool in_array = false;
+    for (auto const &config : o->config_) {
+      if (config.isObject() && o->isValidOutput(config)) {
+        in_array = true;
+        o->config_ = config;
+        break;
+      }
+    }
+    found = in_array;
+  } else {
+    found = o->isValidOutput(o->config_);
+  }
+  if (!found) {
+    o->destroyOutput();
+  } else {
+    o->initBar();
+  }
 }
 
 void waybar::Bar::handleDescription(void* /*data*/,
@@ -102,7 +158,6 @@ void waybar::Bar::layerSurfaceHandleConfigure(void* data,
   uint32_t height)
 {
   auto o = static_cast<waybar::Bar *>(data);
-  o->window.show_all();
   zwlr_layer_surface_v1_ack_configure(surface, serial);
   if (width != o->width_ || height != o->height_) {
     o->width_ = width;
@@ -221,4 +276,5 @@ auto waybar::Bar::setupWidgets() -> void
   for (auto const& module : modules_right_) {
     right_.pack_end(*module, false, false, 0);
   }
+  window.show_all();
 }

src/modules/network.cpp

@@ -65,7 +65,7 @@ void waybar::modules::Network::createInfoSocket()
   }
   nl_socket_disable_seq_check(info_sock_);
   nl_socket_set_nonblocking(info_sock_);
-  nl_socket_modify_cb(info_sock_, NL_CB_MSG_IN, NL_CB_CUSTOM, handleEvents, this);
+  nl_socket_modify_cb(info_sock_, NL_CB_VALID, NL_CB_CUSTOM, handleEvents, this);
   efd_ = epoll_create1(0);
   if (efd_ < 0) {
     throw std::runtime_error("Can't create epoll");