Merge pull request #1991 from alex-courtis/add-river-layout

src/factory.cpp

@@ -64,6 +64,9 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name) const {
     if (ref == "river/window") {
       return new waybar::modules::river::Window(id, bar_, config_[name]);
     }
+    if (ref == "river/layout") {
+      return new waybar::modules::river::Layout(id, bar_, config_[name]);
+    }
 #endif
 #ifdef HAVE_HYPRLAND
     if (ref == "hyprland/window") {

src/modules/river/layout.cpp

@@ -0,0 +1,174 @@
+#include "modules/river/layout.hpp"
+
+#include <spdlog/spdlog.h>
+#include <wayland-client.h>
+
+#include "client.hpp"
+
+namespace waybar::modules::river {
+
+static void listen_focused_tags(void *data, struct zriver_output_status_v1 *zriver_output_status_v1,
+                                uint32_t tags) {
+  // Intentionally empty
+}
+
+static void listen_view_tags(void *data, struct zriver_output_status_v1 *zriver_output_status_v1,
+                             struct wl_array *tags) {
+  // Intentionally empty
+}
+
+static void listen_urgent_tags(void *data, struct zriver_output_status_v1 *zriver_output_status_v1,
+                               uint32_t tags) {
+  // Intentionally empty
+}
+
+static void listen_layout_name(void *data, struct zriver_output_status_v1 *zriver_output_status_v1,
+                               const char *layout) {
+  static_cast<Layout *>(data)->handle_name(layout);
+}
+
+static void listen_layout_name_clear(void *data,
+                                     struct zriver_output_status_v1 *zriver_output_status_v1) {
+  static_cast<Layout *>(data)->handle_clear();
+}
+
+static void listen_focused_output(void *data, struct zriver_seat_status_v1 *zriver_seat_status_v1,
+                                  struct wl_output *output) {
+  static_cast<Layout *>(data)->handle_focused_output(output);
+}
+
+static void listen_unfocused_output(void *data, struct zriver_seat_status_v1 *zriver_seat_status_v1,
+                                    struct wl_output *output) {
+  static_cast<Layout *>(data)->handle_unfocused_output(output);
+}
+
+static void listen_focused_view(void *data, struct zriver_seat_status_v1 *zriver_seat_status_v1,
+                                const char *title) {
+  // Intentionally empty
+}
+
+static void listen_mode(void *data, struct zriver_seat_status_v1 *zriver_seat_status_v1,
+                        const char *mode) {
+  // Intentionally empty
+}
+
+static const zriver_output_status_v1_listener output_status_listener_impl{
+    .focused_tags = listen_focused_tags,
+    .view_tags = listen_view_tags,
+    .urgent_tags = listen_urgent_tags,
+    .layout_name = listen_layout_name,
+    .layout_name_clear = listen_layout_name_clear,
+};
+
+static const zriver_seat_status_v1_listener seat_status_listener_impl{
+    .focused_output = listen_focused_output,
+    .unfocused_output = listen_unfocused_output,
+    .focused_view = listen_focused_view,
+    .mode = listen_mode,
+};
+
+static void handle_global(void *data, struct wl_registry *registry, uint32_t name,
+                          const char *interface, uint32_t version) {
+  if (std::strcmp(interface, zriver_status_manager_v1_interface.name) == 0) {
+    version = std::min<uint32_t>(version, 4);
+
+    // implies ZRIVER_OUTPUT_STATUS_V1_LAYOUT_NAME_CLEAR_SINCE_VERSION
+    if (version < ZRIVER_OUTPUT_STATUS_V1_LAYOUT_NAME_SINCE_VERSION) {
+      spdlog::error(
+          "river server does not support the \"layout_name\" and \"layout_clear\" events; the "
+          "module will be disabled" +
+          std::to_string(version));
+      return;
+    }
+    static_cast<Layout *>(data)->status_manager_ = static_cast<struct zriver_status_manager_v1 *>(
+        wl_registry_bind(registry, name, &zriver_status_manager_v1_interface, version));
+  }
+
+  if (std::strcmp(interface, wl_seat_interface.name) == 0) {
+    version = std::min<uint32_t>(version, 1);
+    static_cast<Layout *>(data)->seat_ = static_cast<struct wl_seat *>(
+        wl_registry_bind(registry, name, &wl_seat_interface, version));
+  }
+}
+
+static void handle_global_remove(void *data, struct wl_registry *registry, uint32_t name) {
+  // Nobody cares
+}
+
+static const wl_registry_listener registry_listener_impl = {.global = handle_global,
+                                                            .global_remove = handle_global_remove};
+
+Layout::Layout(const std::string &id, const waybar::Bar &bar, const Json::Value &config)
+    : waybar::ALabel(config, "layout", id, "{}"),
+      status_manager_{nullptr},
+      seat_{nullptr},
+      bar_(bar),
+      output_status_{nullptr} {
+  struct wl_display *display = Client::inst()->wl_display;
+  struct wl_registry *registry = wl_display_get_registry(display);
+  wl_registry_add_listener(registry, &registry_listener_impl, this);
+  wl_display_roundtrip(display);
+
+  output_ = gdk_wayland_monitor_get_wl_output(bar_.output->monitor->gobj());
+
+  if (!status_manager_) {
+    spdlog::error("river_status_manager_v1 not advertised");
+    return;
+  }
+
+  if (!seat_) {
+    spdlog::error("wl_seat not advertised");
+  }
+
+  label_.hide();
+  ALabel::update();
+
+  seat_status_ = zriver_status_manager_v1_get_river_seat_status(status_manager_, seat_);
+  zriver_seat_status_v1_add_listener(seat_status_, &seat_status_listener_impl, this);
+
+  output_status_ = zriver_status_manager_v1_get_river_output_status(status_manager_, output_);
+  zriver_output_status_v1_add_listener(output_status_, &output_status_listener_impl, this);
+
+  zriver_status_manager_v1_destroy(status_manager_);
+}
+
+Layout::~Layout() {
+  if (output_status_) {
+    zriver_output_status_v1_destroy(output_status_);
+  }
+  if (seat_status_) {
+    zriver_seat_status_v1_destroy(seat_status_);
+  }
+}
+
+void Layout::handle_name(const char *name) {
+  if (std::strcmp(name, "") == 0 || format_.empty()) {
+    label_.hide();  // hide empty labels or labels with empty format
+  } else {
+    label_.show();
+    label_.set_markup(fmt::format(fmt::runtime(format_), Glib::Markup::escape_text(name).raw()));
+  }
+  ALabel::update();
+}
+
+void Layout::handle_clear() {
+  label_.hide();
+  ALabel::update();
+}
+
+void Layout::handle_focused_output(struct wl_output *output) {
+  if (output_ == output) {  // if we focused the output this bar belongs to
+    label_.get_style_context()->add_class("focused");
+    ALabel::update();
+  }
+  focused_output_ = output;
+}
+
+void Layout::handle_unfocused_output(struct wl_output *output) {
+  if (output_ == output) {  // if we unfocused the output this bar belongs to
+    label_.get_style_context()->remove_class("focused");
+    ALabel::update();
+  }
+}
+
+} /* namespace waybar::modules::river */