Add niri/workspaces, niri/window, niri/language

Author: YaLTeR

README.md

@@ -8,6 +8,7 @@
 - Sway (Workspaces, Binding mode, Focused window name)
 - River (Mapping mode, Tags, Focused window name)
 - Hyprland (Window Icons, Workspaces, Focused window name)
+- Niri (Workspaces, Focused window name, Language)
 - DWL (Tags, Focused window name) [requires dwl ipc patch](https://github.com/djpohly/dwl/wiki/ipc)
 - Tray [#21](https://github.com/Alexays/Waybar/issues/21)
 - Local time

include/modules/niri/backend.hpp

@@ -0,0 +1,52 @@
+#pragma once
+
+#include <list>
+#include <mutex>
+#include <string>
+#include <utility>
+
+#include "util/json.hpp"
+
+namespace waybar::modules::niri {
+
+class EventHandler {
+ public:
+  virtual void onEvent(const Json::Value& ev) = 0;
+  virtual ~EventHandler() = default;
+};
+
+class IPC {
+ public:
+  IPC() { startIPC(); }
+
+  void registerForIPC(const std::string& ev, EventHandler* ev_handler);
+  void unregisterForIPC(EventHandler* handler);
+
+  static Json::Value send(const Json::Value& request);
+
+  // The data members are only safe to access while dataMutex_ is locked.
+  std::lock_guard<std::mutex> lockData() { return std::lock_guard(dataMutex_); }
+  const std::vector<Json::Value> &workspaces() const { return workspaces_; }
+  const std::vector<Json::Value> &windows() const { return windows_; }
+  const std::vector<std::string> &keyboardLayoutNames() const { return keyboardLayoutNames_; }
+  unsigned keyboardLayoutCurrent() const { return keyboardLayoutCurrent_; }
+
+ private:
+  void startIPC();
+  static int connectToSocket();
+  void parseIPC(const std::string&);
+
+  std::mutex dataMutex_;
+  std::vector<Json::Value> workspaces_;
+  std::vector<Json::Value> windows_;
+  std::vector<std::string> keyboardLayoutNames_;
+  unsigned keyboardLayoutCurrent_;
+
+  util::JsonParser parser_;
+  std::mutex callbackMutex_;
+  std::list<std::pair<std::string, EventHandler*>> callbacks_;
+};
+
+inline std::unique_ptr<IPC> gIPC;
+
+};  // namespace waybar::modules::niri

include/modules/niri/language.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <string>
+
+#include "ALabel.hpp"
+#include "bar.hpp"
+#include "modules/niri/backend.hpp"
+
+namespace waybar::modules::niri {
+
+class Language : public ALabel, public EventHandler {
+ public:
+  Language(const std::string&, const Bar&, const Json::Value&);
+  ~Language() override;
+  void update() override;
+
+ private:
+  void updateFromIPC();
+  void onEvent(const Json::Value &ev) override;
+  void doUpdate();
+
+  struct Layout {
+    std::string full_name;
+    std::string short_name;
+    std::string variant;
+    std::string short_description;
+  };
+
+  static Layout getLayout(const std::string &fullName);
+
+  std::mutex mutex_;
+  const Bar &bar_;
+
+  std::vector<Layout> layouts_;
+  unsigned current_idx_;
+};
+
+}  // namespace waybar::modules::niri

include/modules/niri/window.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <gtkmm/button.h>
+#include <json/value.h>
+
+#include "AAppIconLabel.hpp"
+#include "bar.hpp"
+#include "modules/niri/backend.hpp"
+
+namespace waybar::modules::niri {
+
+class Window : public AAppIconLabel, public EventHandler {
+ public:
+  Window(const std::string &, const Bar &, const Json::Value &);
+  ~Window() override;
+  void update() override;
+
+ private:
+  void onEvent(const Json::Value &ev) override;
+  void doUpdate();
+  void setClass(const std::string &className, bool enable);
+
+  const Bar &bar_;
+
+  std::string oldAppId_;
+};
+
+}  // namespace waybar::modules::niri

include/modules/niri/workspaces.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <gtkmm/button.h>
+#include <json/value.h>
+
+#include "AModule.hpp"
+#include "bar.hpp"
+#include "modules/niri/backend.hpp"
+
+namespace waybar::modules::niri {
+
+class Workspaces : public AModule, public EventHandler {
+ public:
+  Workspaces(const std::string &, const Bar &, const Json::Value &);
+  ~Workspaces() override;
+  void update() override;
+
+ private:
+  void onEvent(const Json::Value &ev) override;
+  void doUpdate();
+  Gtk::Button &addButton(const Json::Value &ws);
+  std::string getIcon(const std::string &value, const Json::Value &ws);
+
+  const Bar &bar_;
+  Gtk::Box box_;
+  // Map from niri workspace id to button.
+  std::unordered_map<uint64_t, Gtk::Button> buttons_;
+};
+
+}  // namespace waybar::modules::niri

man/waybar-niri-language.5.scd

@@ -0,0 +1,60 @@
+waybar-niri-language(5)
+
+# NAME
+
+waybar - niri language module
+
+# DESCRIPTION
+
+The *language* module displays the currently selected language in niri.
+
+# CONFIGURATION
+
+Addressed by *niri/language*
+
+*format*: ++
+	typeof: string ++
+	default: {} ++
+	The format, how information should be displayed.
+
+*format-<lang>* ++
+	typeof: string++
+	Provide an alternative name to display per language where <lang> is the language of your choosing. Can be passed multiple times with multiple languages as shown by the example below.
+
+*menu*: ++
+	typeof: string ++
+	Action that popups the menu.
+
+*menu-file*: ++
+	typeof: string ++
+	Location of the menu descriptor file. There need to be an element of type GtkMenu with id *menu*
+
+*menu-actions*: ++
+	typeof: array ++
+	The actions corresponding to the buttons of the menu.
+
+
+# FORMAT REPLACEMENTS
+
+*{short}*: Short name of layout (e.g. "us"). Equals to {}.
+
+*{shortDescription}*: Short description of layout (e.g. "en").
+
+*{long}*: Long name of layout (e.g. "English (Dvorak)").
+
+*{variant}*: Variant of layout (e.g. "dvorak").
+
+
+# EXAMPLES
+
+```
+"niri/language": {
+	"format": "Lang: {long}"
+	"format-en": "AMERICA, HELL YEAH!"
+	"format-tr": "As bayrakları"
+}
+```
+
+# STYLE
+
+- *#language*

man/waybar-niri-window.5.scd

@@ -0,0 +1,81 @@
+waybar-niri-window(5)
+
+# NAME
+
+waybar - niri window module
+
+# DESCRIPTION
+
+The *window* module displays the title of the currently focused window in niri.
+
+# CONFIGURATION
+
+Addressed by *niri/window*
+
+*format*: ++
+	typeof: string ++
+	default: {title} ++
+	The format, how information should be displayed. On {} the current window title is displayed.
+
+*rewrite*: ++
+	typeof: object ++
+	Rules to rewrite window title. See *rewrite rules*.
+
+*separate-outputs*: ++
+	typeof: bool ++
+	Show the active window of the monitor the bar belongs to, instead of the focused window.
+
+*icon*: ++
+	typeof: bool ++
+	default: false ++
+	Option to hide the application icon.
+
+*icon-size*: ++
+	typeof: integer ++
+	default: 24 ++
+	Option to change the size of the application icon.
+
+# FORMAT REPLACEMENTS
+
+See the output of "niri msg focused-window" for examples
+
+*{title}*: The current title of the focused window.
+
+*{app_id}*: The current app ID of the focused window.
+
+# REWRITE RULES
+
+*rewrite* is an object where keys are regular expressions and values are
+rewrite rules if the expression matches. Rules may contain references to
+captures of the expression.
+
+Regular expression and replacement follow ECMA-script rules.
+
+If no expression matches, the title is left unchanged.
+
+Invalid expressions (e.g., mismatched parentheses) are skipped.
+
+# EXAMPLES
+
+```
+"niri/window": {
+	"format": "{}",
+	"rewrite": {
+		"(.*) - Mozilla Firefox": "🌎 $1",
+		"(.*) - zsh": "> [$1]"
+	}
+}
+```
+
+# STYLE
+
+- *#window*
+- *window#waybar.empty #window* When no windows are on the workspace
+
+The following classes are applied to the entire Waybar rather than just the
+window widget:
+
+- *window#waybar.empty* When no windows are in the workspace
+- *window#waybar.solo* When only one window is on the workspace
+- *window#waybar.<app-id>* Where *app-id* is the app ID of the only window on
+  the workspace