add Hyprland/windowcount module

include/modules/hyprland/windowcount.hpp

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <fmt/format.h>
+
+#include <string>
+
+#include "AAppIconLabel.hpp"
+#include "bar.hpp"
+#include "modules/hyprland/backend.hpp"
+#include "util/json.hpp"
+
+namespace waybar::modules::hyprland {
+
+class WindowCount : public waybar::AAppIconLabel, public EventHandler {
+ public:
+  WindowCount(const std::string&, const waybar::Bar&, const Json::Value&);
+  ~WindowCount() override;
+
+  auto update() -> void override;
+
+ private:
+  struct Workspace {
+    int id;
+    int windows;
+    bool hasfullscreen;
+    static auto parse(const Json::Value& value) -> Workspace;
+  };
+
+  static auto getActiveWorkspace(const std::string&) -> Workspace;
+  static auto getActiveWorkspace() -> Workspace;
+  void onEvent(const std::string& ev) override;
+  void queryActiveWorkspace();
+  void setClass(const std::string&, bool enable);
+
+  bool separateOutputs_;
+  std::mutex mutex_;
+  const Bar& bar_;
+  Workspace workspace_;
+};
+
+}  // namespace waybar::modules::hyprland

man/waybar-hyprland-windowcount.5.scd

@@ -0,0 +1,46 @@
+waybar-hyprland-windowcount(5)
+
+# NAME
+
+waybar - hyprland window count module
+
+# DESCRIPTION
+
+The *windowcount* module displays the number of windows in the current Hyprland workspace.
+
+# CONFIGURATION
+
+Addressed by *hyprland/windowcount*
+
+*format*: ++
+	typeof: string ++
+	default: {} ++
+	The format for how information should be displayed. On {} the current workspace window count is displayed.
+
+*format-empty*: ++
+	typeof: string ++
+	Override the format when the workspace contains no windows window
+
+*format-windowed*: ++
+	typeof: string ++
+	Override the format when the workspace contains no fullscreen windows
+
+*format-fullscreen*: ++
+	typeof: string ++
+	Override the format when the workspace contains a fullscreen window
+
+*separate-outputs*: ++
+	typeof: bool ++
+	default: true ++
+	Show the active workspace window count of the monitor the bar belongs to, instead of the focused workspace.
+
+# STYLE
+
+- *#windowcount*
+
+The following classes are applied to the entire Waybar rather than just the
+windowcount widget:
+
+- *window#waybar.empty* When no windows are in the workspace
+- *window#waybar.fullscreen* When there is a fullscreen window in the workspace;
+  useful with Hyprland's *fullscreen, 1* mode

meson.build

@@ -306,6 +306,7 @@ if true
         'src/modules/hyprland/language.cpp',
         'src/modules/hyprland/submap.cpp',
         'src/modules/hyprland/window.cpp',
+        'src/modules/hyprland/windowcount.cpp',
         'src/modules/hyprland/workspace.cpp',
         'src/modules/hyprland/workspaces.cpp',
         'src/modules/hyprland/windowcreationpayload.cpp',

src/factory.cpp

@@ -34,6 +34,7 @@
 #include "modules/hyprland/language.hpp"
 #include "modules/hyprland/submap.hpp"
 #include "modules/hyprland/window.hpp"
+#include "modules/hyprland/windowcount.hpp"
 #include "modules/hyprland/workspaces.hpp"
 #endif
 #ifdef HAVE_NIRI
@@ -201,6 +202,9 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name,
     if (ref == "hyprland/window") {
       return new waybar::modules::hyprland::Window(id, bar_, config_[name]);
     }
+    if (ref == "hyprland/windowcount") {
+      return new waybar::modules::hyprland::WindowCount(id, bar_, config_[name]);
+    }
     if (ref == "hyprland/language") {
       return new waybar::modules::hyprland::Language(id, bar_, config_[name]);
     }

src/modules/hyprland/windowcount.cpp

@@ -0,0 +1,142 @@
+#include "modules/hyprland/windowcount.hpp"
+
+#include <glibmm/fileutils.h>
+#include <glibmm/keyfile.h>
+#include <glibmm/miscutils.h>
+#include <spdlog/spdlog.h>
+
+#include <algorithm>
+#include <vector>
+
+#include "modules/hyprland/backend.hpp"
+#include "util/sanitize_str.hpp"
+
+namespace waybar::modules::hyprland {
+
+WindowCount::WindowCount(const std::string& id, const Bar& bar, const Json::Value& config)
+    : AAppIconLabel(config, "windowcount", id, "{count}", 0, true), bar_(bar) {
+  modulesReady = true;
+  separateOutputs_ =
+      config.isMember("separate-outputs") ? config["separate-outputs"].asBool() : true;
+
+  if (!gIPC) {
+    gIPC = std::make_unique<IPC>();
+  }
+
+  queryActiveWorkspace();
+  update();
+  dp.emit();
+
+  // register for hyprland ipc
+  gIPC->registerForIPC("fullscreen", this);
+  gIPC->registerForIPC("workspace", this);
+  gIPC->registerForIPC("focusedmon", this);
+  gIPC->registerForIPC("openwindow", this);
+  gIPC->registerForIPC("closewindow", this);
+  gIPC->registerForIPC("movewindow", this);
+}
+
+WindowCount::~WindowCount() {
+  gIPC->unregisterForIPC(this);
+  // wait for possible event handler to finish
+  std::lock_guard<std::mutex> lg(mutex_);
+}
+
+auto WindowCount::update() -> void {
+  std::lock_guard<std::mutex> lg(mutex_);
+
+  std::string format = config_["format"].asString();
+  std::string formatEmpty = config_["format-empty"].asString();
+  std::string formatWindowed = config_["format-windowed"].asString();
+  std::string formatFullscreen = config_["format-fullscreen"].asString();
+
+  setClass("empty", workspace_.windows == 0);
+  setClass("fullscreen", workspace_.hasfullscreen);
+
+  if (workspace_.windows == 0 && !formatEmpty.empty()) {
+    label_.set_markup(fmt::format(fmt::runtime(formatEmpty), workspace_.windows));
+  } else if (!workspace_.hasfullscreen && !formatWindowed.empty()) {
+    label_.set_markup(fmt::format(fmt::runtime(formatWindowed), workspace_.windows));
+  } else if (workspace_.hasfullscreen && !formatFullscreen.empty()) {
+    label_.set_markup(fmt::format(fmt::runtime(formatFullscreen), workspace_.windows));
+  } else if (!format.empty()) {
+    label_.set_markup(fmt::format(fmt::runtime(format), workspace_.windows));
+  } else {
+    label_.set_text(fmt::format("{}", workspace_.windows));
+  }
+
+  label_.show();
+  AAppIconLabel::update();
+}
+
+auto WindowCount::getActiveWorkspace() -> Workspace {
+  const auto workspace = gIPC->getSocket1JsonReply("activeworkspace");
+
+  if (workspace.isObject()) {
+    return Workspace::parse(workspace);
+  }
+
+  return {};
+}
+
+auto WindowCount::getActiveWorkspace(const std::string& monitorName) -> Workspace {
+  const auto monitors = gIPC->getSocket1JsonReply("monitors");
+  if (monitors.isArray()) {
+    auto monitor = std::find_if(monitors.begin(), monitors.end(), [&](Json::Value monitor) {
+      return monitor["name"] == monitorName;
+    });
+    if (monitor == std::end(monitors)) {
+      spdlog::warn("Monitor not found: {}", monitorName);
+      return Workspace{-1, 0, false};
+    }
+    const int id = (*monitor)["activeWorkspace"]["id"].asInt();
+
+    const auto workspaces = gIPC->getSocket1JsonReply("workspaces");
+    if (workspaces.isArray()) {
+      auto workspace = std::find_if(workspaces.begin(), workspaces.end(),
+                                    [&](Json::Value workspace) { return workspace["id"] == id; });
+      if (workspace == std::end(workspaces)) {
+        spdlog::warn("No workspace with id {}", id);
+        return Workspace{-1, 0, false};
+      }
+      return Workspace::parse(*workspace);
+    };
+  };
+
+  return {};
+}
+
+auto WindowCount::Workspace::parse(const Json::Value& value) -> WindowCount::Workspace {
+  return Workspace{
+      value["id"].asInt(),
+      value["windows"].asInt(),
+      value["hasfullscreen"].asBool(),
+  };
+}
+
+void WindowCount::queryActiveWorkspace() {
+  std::lock_guard<std::mutex> lg(mutex_);
+
+  if (separateOutputs_) {
+    workspace_ = getActiveWorkspace(this->bar_.output->name);
+  } else {
+    workspace_ = getActiveWorkspace();
+  }
+}
+
+void WindowCount::onEvent(const std::string& ev) {
+  queryActiveWorkspace();
+  dp.emit();
+}
+
+void WindowCount::setClass(const std::string& classname, bool enable) {
+  if (enable) {
+    if (!bar_.window.get_style_context()->has_class(classname)) {
+      bar_.window.get_style_context()->add_class(classname);
+    }
+  } else {
+    bar_.window.get_style_context()->remove_class(classname);
+  }
+}
+
+}  // namespace waybar::modules::hyprland