merge tray

13 files changed, 1364 insertions, 0 deletions

diff --git a/tray/LICENSE b/tray/LICENSE
new file mode 100644
index 0000000..67cd97b
--- /dev/null
+++ b/tray/LICENSE
@@ -0,0 +1,503 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
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diff --git a/tray/README.md b/tray/README.md
new file mode 100644
index 0000000..c436746
--- /dev/null
+++ b/tray/README.md
@@ -0,0 +1,30 @@
+# libastal-tray
+a library for managing the systemtray by implementing the StatusNotifierItem dbus protocol.
+
+## Build from source
+### Dependencies
+
+- meson
+- glib
+- gdk-pixbuf
+- gtk3
+- gobject-introspection
+- dbusemenu-gtk3
+- vala
+
+```sh
+# Clone the repository
+git clone https://github.com/astal-sh/tray
+cd tray
+
+# Setup and build
+meson setup build
+meson compile -C build
+
+# Install
+meson install -C build
+```
+
+## Todo
+- docs
+- cli tool
diff --git a/tray/flake.lock b/tray/flake.lock
new file mode 100644
index 0000000..8d2ab6e
--- /dev/null
+++ b/tray/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1719254875,
+        "narHash": "sha256-ECni+IkwXjusHsm9Sexdtq8weAq/yUyt1TWIemXt3Ko=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2893f56de08021cffd9b6b6dfc70fd9ccd51eb60",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/tray/flake.nix b/tray/flake.nix
new file mode 100644
index 0000000..c78cbaa
--- /dev/null
+++ b/tray/flake.nix
@@ -0,0 +1,56 @@
+{
+  description = "Library and cli for the StatusNotifierItem protocol";
+
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    version = builtins.replaceStrings ["\n"] [""] (builtins.readFile ./version);
+    system = "x86_64-linux";
+    pkgs = import nixpkgs {inherit system;};
+
+    nativeBuildInputs = with pkgs; [
+      gobject-introspection
+      meson
+      pkg-config
+      ninja
+      vala
+    ];
+
+    buildInputs = with pkgs; [
+      gtk3
+      glib
+      gdk-pixbuf
+      libdbusmenu-gtk3
+      json-glib
+    ];
+  in {
+    packages.${system} = rec {
+      default = tray;
+      tray = pkgs.stdenv.mkDerivation {
+        inherit nativeBuildInputs buildInputs;
+        pname = "astal-tray";
+        version = version;
+        src = ./.;
+        outputs = ["out" "dev"];
+      };
+    };
+
+    devShells.${system} = {
+      default = pkgs.mkShell {
+        inherit nativeBuildInputs buildInputs;
+      };
+      tray = pkgs.mkShell {
+        inherit nativeBuildInputs;
+        buildInputs =
+          buildInputs
+          ++ [
+            self.packages.${system}.default
+            pkgs.gjs
+          ];
+      };
+    };
+  };
+}
diff --git a/tray/meson.build b/tray/meson.build
new file mode 100644
index 0000000..4a52d56
--- /dev/null
+++ b/tray/meson.build
@@ -0,0 +1,19 @@
+project(
+  'astal-tray',
+  'vala',
+  'c',
+  version: run_command('cat', join_paths(meson.project_source_root(), 'version')).stdout().strip(),
+  meson_version: '>= 0.62.0',
+  default_options: [
+    'warning_level=2',
+    'werror=false',
+    'c_std=gnu11',
+  ],
+)
+
+assert(
+  get_option('lib') or get_option('cli'),
+  'Either lib or cli option must be set to true.',
+)
+
+subdir('src')
diff --git a/tray/meson_options.txt b/tray/meson_options.txt
new file mode 100644
index 0000000..f110242
--- /dev/null
+++ b/tray/meson_options.txt
@@ -0,0 +1,11 @@
+option(
+  'lib',
+  type: 'boolean',
+  value: true,
+)
+
+option(
+  'cli',
+  type: 'boolean',
+  value: true,
+)
diff --git a/tray/src/cli.vala b/tray/src/cli.vala
new file mode 100644
index 0000000..3147fb5
--- /dev/null
+++ b/tray/src/cli.vala
@@ -0,0 +1,54 @@
+static bool version;
+static bool daemonize;
+
+const OptionEntry[] options = {
+    { "version", 'v', OptionFlags.NONE, OptionArg.NONE, ref version, "Print version number", null },
+    { "daemonize", 'd', OptionFlags.NONE, OptionArg.NONE, ref daemonize, "Monitor the systemtray", null },
+    { null },
+};
+
+int main(string[] argv) {
+    try {
+        var opts = new OptionContext();
+        opts.add_main_entries(options, null);
+        opts.set_help_enabled(true);
+        opts.set_ignore_unknown_options(false);
+        opts.parse(ref argv);
+    } catch (OptionError err) {
+        printerr (err.message);
+        return 1;
+    }
+
+    if (version) {
+        print(AstalTray.VERSION);
+        return 0;
+    }
+
+    if (daemonize) {
+        var loop = new MainLoop();
+        var tray = new AstalTray.Tray();
+
+        tray.item_added.connect((id) => {
+            AstalTray.TrayItem item = tray.get_item(id);
+
+            stdout.printf("{\"event\":\"item_added\",\"id\":\"%s\",\"item\":%s}\n",
+                id, item.to_json_string());
+            stdout.flush();
+
+            item.changed.connect(() => {
+                stdout.printf("{\"event\":\"item_changed\",\"id\":\"%s\",\"item\":%s}\n",
+                    id, item.to_json_string());
+                stdout.flush();
+            });
+        });
+
+        tray.item_removed.connect((id) => {
+            stdout.printf("{\"event\":\"item_removed\",\"id\":\"%s\"}\n", id);
+            stdout.flush();
+        });
+
+        loop.run();
+    }
+
+    return 0;
+}
diff --git a/tray/src/config.vala.in b/tray/src/config.vala.in
new file mode 100644
index 0000000..8ef8498
--- /dev/null
+++ b/tray/src/config.vala.in
@@ -0,0 +1,6 @@
+namespace AstalTray {
+    public const int MAJOR_VERSION = @MAJOR_VERSION@;
+    public const int MINOR_VERSION = @MINOR_VERSION@;
+    public const int MICRO_VERSION = @MICRO_VERSION@;
+    public const string VERSION = "@VERSION@";
+}
diff --git a/tray/src/meson.build b/tray/src/meson.build
new file mode 100644
index 0000000..b2229b0
--- /dev/null
+++ b/tray/src/meson.build
@@ -0,0 +1,100 @@
+version_split = meson.project_version().split('.')
+api_version = version_split[0] + '.' + version_split[1]
+gir = 'AstalTray-' + api_version + '.gir'
+typelib = 'AstalTray-' + api_version + '.typelib'
+
+config = configure_file(
+  input: 'config.vala.in',
+  output: 'config.vala',
+  configuration: {
+    'VERSION': meson.project_version(),
+    'MAJOR_VERSION': version_split[0],
+    'MINOR_VERSION': version_split[1],
+    'MICRO_VERSION': version_split[2],
+  },
+)
+
+deps = [
+  dependency('glib-2.0'),
+  dependency('gobject-2.0'),
+  dependency('gio-2.0'),
+  dependency('json-glib-1.0'),
+  dependency('gdk-pixbuf-2.0'),
+  dependency('gtk+-3.0'),
+]
+
+dbusmenu_cflags = run_command(
+  find_program('pkg-config', required: true),
+  '--cflags', 'dbusmenu-gtk3-0.4',
+  'gobject-introspection-1.0',
+  'gobject-2.0',
+  'glib-2.0',
+  capture: true,
+  check: true,
+).stdout().strip()
+
+dbusmenu_libs = run_command(
+  find_program('pkg-config', required: true),
+  '--libs', 'dbusmenu-gtk3-0.4',
+  'gobject-introspection-1.0',
+  'gobject-2.0',
+  'glib-2.0',
+  capture: true,
+  check: true,
+).stdout().strip()
+
+sources = [config, 'tray.vala', 'watcher.vala', 'trayItem.vala']
+
+if get_option('lib')
+  lib = library(
+    meson.project_name(),
+    sources,
+    dependencies: deps,
+    vala_header: meson.project_name() + '.h',
+    vala_vapi: meson.project_name() + '-' + api_version + '.vapi',
+    vala_gir: gir,
+    vala_args: ['--pkg', 'DbusmenuGtk3-0.4', '--pkg', 'Dbusmenu-0.4'],
+    version: meson.project_version(),
+    c_args: dbusmenu_cflags.split(' '),
+    link_args: dbusmenu_libs.split(' '),
+    install: true,
+    install_dir: [true, true, true, true],
+  )
+
+  import('pkgconfig').generate(
+    lib,
+    name: meson.project_name(),
+    filebase: meson.project_name() + '-' + api_version,
+    version: meson.project_version(),
+    subdirs: meson.project_name(),
+    requires: deps,
+    install_dir: get_option('libdir') / 'pkgconfig',
+  )
+
+  custom_target(
+    typelib,
+    command: [
+      find_program('g-ir-compiler'),
+      '--output', '@OUTPUT@',
+      '--shared-library', get_option('prefix') / get_option('libdir') / '@PLAINNAME@',
+      meson.current_build_dir() / gir,
+    ],
+    input: lib,
+    output: typelib,
+    depends: lib,
+    install: true,
+    install_dir: get_option('libdir') / 'girepository-1.0',
+  )
+endif
+
+if get_option('cli')
+  executable(
+    meson.project_name(),
+    ['cli.vala', sources],
+    dependencies: deps,
+    vala_args: ['--pkg', 'DbusmenuGtk3-0.4', '--pkg', 'Dbusmenu-0.4'],
+    c_args: dbusmenu_cflags.split(' '),
+    link_args: dbusmenu_libs.split(' '),
+    install: true,
+  )
+endif
diff --git a/tray/src/tray.vala b/tray/src/tray.vala
new file mode 100644
index 0000000..09b0643
--- /dev/null
+++ b/tray/src/tray.vala
@@ -0,0 +1,135 @@
+namespace AstalTray {
+[DBus (name="org.kde.StatusNotifierWatcher")]
+internal interface IWatcher : Object {
+    public abstract string[] RegisteredStatusNotifierItems { owned get; }
+    public abstract int ProtocolVersion { owned get; }
+
+    public abstract void RegisterStatusNotifierItem(string service, BusName sender) throws DBusError, IOError;
+    public abstract void RegisterStatusNotifierHost(string service) throws DBusError, IOError;
+
+    public signal void StatusNotifierItemRegistered(string service);
+    public signal void StatusNotifierItemUnregistered(string service);
+    public signal void StatusNotifierHostRegistered();
+    public signal void StatusNotifierHostUnregistered();
+}
+
+public Tray get_default() {
+    return Tray.get_default();
+}
+
+public class Tray : Object {
+    private static Tray? instance;
+    public static unowned Tray get_default() {
+        if (instance == null)
+            instance = new Tray();
+
+        return instance;
+    }
+
+    private StatusNotifierWatcher watcher;
+    private IWatcher proxy;
+
+    private HashTable<string, TrayItem> _items =
+        new HashTable<string, TrayItem>(str_hash, str_equal);
+
+    public List<weak TrayItem> items { owned get { return _items.get_values(); }}
+
+    public signal void item_added(string service) {
+        notify_property("items");
+    }
+
+    public signal void item_removed(string service) {
+        notify_property("items");
+    }
+
+    construct {
+        try {
+            Bus.own_name(
+                BusType.SESSION,
+                "org.kde.StatusNotifierWatcher",
+                BusNameOwnerFlags.NONE,
+                start_watcher,
+                () => {
+                    if (proxy != null) {
+                        proxy = null;
+                    }
+                },
+                start_host
+            );
+        } catch (Error err) {
+            critical(err.message);
+        }
+
+    }
+
+    private void start_watcher(DBusConnection conn) {
+        try {
+            watcher = new StatusNotifierWatcher();
+            conn.register_object("/StatusNotifierWatcher", watcher);
+            watcher.StatusNotifierItemRegistered.connect(on_item_register);
+            watcher.StatusNotifierItemUnregistered.connect(on_item_unregister);
+        } catch (Error err) {
+            critical(err.message);
+        }
+    }
+
+    private void start_host() {
+        if (proxy != null)
+            return;
+
+        try {
+            proxy = Bus.get_proxy_sync(BusType.SESSION,
+                "org.kde.StatusNotifierWatcher",
+                "/StatusNotifierWatcher"); 
+
+            proxy.StatusNotifierItemRegistered.connect(on_item_register);
+            proxy.StatusNotifierItemUnregistered.connect(on_item_unregister);
+
+            proxy.notify["g-name-owner"].connect(() => {
+                _items.foreach((service, _) => {
+                    item_removed(service);
+                });
+
+                _items.remove_all();
+
+                if(proxy != null) {
+                    foreach (string item in proxy.RegisteredStatusNotifierItems) {
+                        on_item_register(item);
+                    }
+                } else {
+                    foreach (string item in watcher.RegisteredStatusNotifierItems) {
+                        on_item_register(item);
+                    }
+                }
+            });
+
+            foreach (string item in proxy.RegisteredStatusNotifierItems) {
+                on_item_register(item);
+            }
+        } catch (Error err) {
+            critical("cannot get proxy: %s", err.message);
+        }
+    }
+
+    private void on_item_register(string service) {
+        if (_items.contains(service))
+            return;
+
+        var parts = service.split("/", 2);
+        TrayItem item = new TrayItem(parts[0], "/" + parts[1]);
+        item.ready.connect(() => {
+            _items.set(service, item);
+            item_added(service);
+        });
+    }
+
+    private void on_item_unregister(string service) {
+        _items.remove(service);
+        item_removed(service);
+    }
+
+    public TrayItem get_item(string service) {
+        return _items.get(service);
+    }
+}
+}
diff --git a/tray/src/trayItem.vala b/tray/src/trayItem.vala
new file mode 100644
index 0000000..b6b9da0
--- /dev/null
+++ b/tray/src/trayItem.vala
@@ -0,0 +1,363 @@
+using DbusmenuGtk;
+
+namespace AstalTray {
+public struct Pixmap {
+    int width;
+    int height;
+    uint8[] bytes;
+}
+
+public struct Tooltip {
+    string icon_name;
+    Pixmap[] icon;
+    string title;
+    string description;
+}
+
+[DBus (use_string_marshalling = true)]
+public enum Category {
+    [DBus (value = "ApplicationStatus"), Description (nick = "ApplicationStatus")]
+    APPLICATION,
+
+    [DBus (value = "Communications"), Description (nick = "Communications")]
+    COMMUNICATIONS,
+
+    [DBus (value = "SystemServices"), Description (nick = "SystemServices")]
+    SYSTEM,
+
+    [DBus (value = "Hardware"), Description (nick = "Hardware")]
+    HARDWARE;
+
+    public string to_nick () {
+        var enumc = (EnumClass)typeof (Category).class_ref();
+        unowned var eval = enumc.get_value(this);
+        return eval.value_nick;
+    }
+}
+
+
+[DBus (use_string_marshalling = true)]
+public enum Status {
+    [DBus (value = "Passive"), Description (nick = "Passive")]
+    PASSIVE,
+
+    [DBus (value = "Active"), Description (nick = "Active")]
+    ACTIVE,
+
+    [DBus (value = "NeedsAttention"), Description (nick = "NeedsAttention")]
+    NEEDS_ATTENTION;
+
+    public string to_nick () {
+        var enumc = (EnumClass)typeof (Status).class_ref();
+        unowned var eval = enumc.get_value(this);
+        return eval.value_nick;
+    }
+}
+
+[DBus (name="org.kde.StatusNotifierItem")]
+internal interface IItem : DBusProxy {
+    public abstract string Title { owned get; }
+    public abstract Category Category { owned get; }
+    public abstract Status Status { owned get; }
+    public abstract Tooltip? ToolTip { owned get; }
+    public abstract string Id { owned get; }
+    public abstract string? IconThemePath { owned get; }
+    public abstract bool ItemIsMenu { owned get; }
+    public abstract ObjectPath? Menu { owned get; }
+    public abstract string IconName { owned get; }
+    public abstract Pixmap[] IconPixmap { owned get; }
+    public abstract string AttentionIconName { owned get; }
+    public abstract Pixmap[] AttentionIconPixmap { owned get; }
+    public abstract string OverlayIconName { owned get; }
+    public abstract Pixmap[] OverlayIconPixmap { owned get; }
+
+    public abstract void ContexMenu(int x, int y) throws DBusError, IOError;
+    public abstract void Activate(int x, int y) throws DBusError, IOError;
+    public abstract void SecondaryActivate(int x, int y) throws DBusError, IOError;
+    public abstract void Scroll(int delta, string orientation) throws DBusError, IOError;
+
+    public signal void NewTitle();
+    public signal void NewIcon();
+    public signal void NewAttentionIcon();
+    public signal void NewOverlayIcon();
+    public signal void NewToolTip();
+    public signal void NewStatus(string status);
+}
+
+public class TrayItem : Object {
+    private IItem proxy;
+    private List<ulong> connection_ids;
+
+    public string title { owned get { return proxy.Title; } }
+    public Category category { get { return proxy.Category; } }
+    public Status status {  get { return proxy.Status; } }
+    public Tooltip? tooltip { owned get { return proxy.ToolTip; } }
+
+    public string tooltip_markup {
+        owned get {
+            if (proxy.ToolTip == null)
+                return "";
+
+            var tt = proxy.ToolTip.title;
+            if (proxy.ToolTip.description != "")
+                tt += "\n" + proxy.ToolTip.description;
+
+            return tt;
+        }
+    }
+
+    public string id { owned get { return proxy.Id ;} }
+    public string icon_theme_path { owned get { return proxy.IconThemePath ;} }
+    public bool is_menu { get { return proxy.ItemIsMenu ;} }
+
+    public string icon_name {
+        owned get {
+            return proxy.Status == Status.NEEDS_ATTENTION
+                ? proxy.AttentionIconName
+                : proxy.IconName;
+        }
+    }
+
+    public Gdk.Pixbuf icon_pixbuf { owned get { return _get_icon_pixbuf(); } }
+
+    public GLib.Icon gicon { get; private set; }
+    
+    public string item_id { get; private set; }
+
+    public signal void changed();
+    public signal void ready();
+
+    public TrayItem(string service, string path) {
+        connection_ids = new List<ulong>();
+        item_id = service + path;
+        setup_proxy.begin(service, path, (_, res) => setup_proxy.end(res));
+    }
+
+    private async void setup_proxy(string service, string path) {
+        try {
+            proxy = yield Bus.get_proxy(
+                BusType.SESSION,
+                service,
+                path);
+
+            connection_ids.append(proxy.NewStatus.connect(refresh_all_properties));
+            connection_ids.append(proxy.NewToolTip.connect(refresh_all_properties));
+            connection_ids.append(proxy.NewTitle.connect(refresh_all_properties));
+            connection_ids.append(proxy.NewIcon.connect(refresh_all_properties));
+
+            proxy.notify["g-name-owner"].connect(() => {
+                if (proxy.g_name_owner == null) {
+                    foreach (var id in connection_ids)
+                        SignalHandler.disconnect(proxy, id);
+                }
+            });
+           
+            update_gicon();
+
+            ready();
+        } catch (Error err) {
+            critical(err.message);
+        }
+    }
+
+    private void _notify() {
+        string[] props = { "category", "id", "title", "status", "is-menu", "tooltip-markup", "icon-name", "icon-pixbuf" };
+
+        foreach (string prop in props)
+            notify_property(prop);
+
+        changed();
+    }
+
+    private void update_gicon() {
+        if(icon_name != null && icon_name != "") {
+            if(icon_theme_path != null && icon_theme_path != "") {
+
+                Gtk.IconTheme icon_theme = new Gtk.IconTheme();
+                string[] paths = {icon_theme_path};
+                icon_theme.set_search_path(paths);
+
+                int size = icon_theme.get_icon_sizes(icon_name)[0];
+                Gtk.IconInfo icon_info = icon_theme.lookup_icon(
+                    icon_name, size, Gtk.IconLookupFlags.FORCE_SIZE);
+
+                if (icon_info != null)
+                    gicon = new GLib.FileIcon(GLib.File.new_for_path(icon_info.get_filename()));
+            } else {
+                gicon = new GLib.ThemedIcon(icon_name);
+            }
+        }
+        else {
+            Pixmap[] pixmaps = proxy.Status == Status.NEEDS_ATTENTION
+                ? proxy.AttentionIconPixmap
+                : proxy.IconPixmap;
+            gicon = pixmap_to_pixbuf(pixmaps);
+        }
+    }
+
+
+    private void refresh_all_properties() {
+        proxy.g_connection.call.begin(
+            proxy.g_name,
+            proxy.g_object_path,
+            "org.freedesktop.DBus.Properties",
+            "GetAll",
+            new Variant("(s)", proxy.g_interface_name),
+            new VariantType("(a{sv})"),
+            DBusCallFlags.NONE,
+            -1,
+            null,
+            (_, result) => {
+                try {
+                    Variant parameters = proxy.g_connection.call.end(result);
+                    VariantIter prop_iter;
+                    parameters.get("(a{sv})", out prop_iter);
+
+                    string prop_key;
+                    Variant prop_value;
+
+                    while (prop_iter.next ("{sv}", out prop_key, out prop_value)) {
+                        proxy.set_cached_property(prop_key, prop_value);
+                    }
+
+                    update_gicon();
+
+                    _notify();
+                } catch(Error e) {
+                    //silently ignore
+                }
+            }
+        );
+    }
+
+    public void activate(int x, int y) {
+        try {
+            proxy.Activate(x, y);
+        } catch (Error e) {
+            if(e.domain != DBusError.quark() || e.code != DBusError.UNKNOWN_METHOD)
+                warning(e.message);
+        }
+    }
+
+    public void secondary_activate(int x, int y) {
+        try {
+            proxy.SecondaryActivate(x, y);
+        } catch (Error e) {
+            if(e.domain != DBusError.quark() || e.code != DBusError.UNKNOWN_METHOD)
+                warning(e.message);
+        }
+    }
+
+    public void scroll(int delta, string orientation) {
+        try {
+            proxy.Scroll(delta, orientation);
+        } catch (Error e) {
+            if(e.domain != DBusError.quark() || e.code != DBusError.UNKNOWN_METHOD) 
+                warning("%s\n", e.message);
+        }
+    }
+
+
+    public DbusmenuGtk.Menu? create_menu() {
+        if (proxy.Menu == null)
+            return null;
+
+        return new DbusmenuGtk.Menu(
+            proxy.get_name_owner(),
+            proxy.Menu);
+    }
+
+    public Gdk.Pixbuf? _get_icon_pixbuf() {
+        Pixmap[] pixmaps = proxy.Status == Status.NEEDS_ATTENTION
+            ? proxy.AttentionIconPixmap
+            : proxy.IconPixmap;
+
+
+        string icon_name = proxy.Status == Status.NEEDS_ATTENTION
+            ? proxy.AttentionIconName
+            : proxy.IconName;
+
+        Gdk.Pixbuf pixbuf = null;
+
+        if (icon_name != null && proxy.IconThemePath != null)
+            pixbuf = load_from_theme(icon_name, proxy.IconThemePath);
+
+        if (pixbuf == null)
+            pixbuf = pixmap_to_pixbuf(pixmaps);
+
+        return pixbuf;
+    }
+
+    private Gdk.Pixbuf? load_from_theme(string icon_name, string theme_path) {
+        if (theme_path == "" || theme_path == null)
+            return null;
+
+        if (icon_name == "" || icon_name == null)
+            return null;
+
+        Gtk.IconTheme icon_theme = new Gtk.IconTheme();
+        string[] paths = {theme_path};
+        icon_theme.set_search_path(paths);
+
+        int size = icon_theme.get_icon_sizes(icon_name)[0];
+        Gtk.IconInfo icon_info = icon_theme.lookup_icon(
+            icon_name, size, Gtk.IconLookupFlags.FORCE_SIZE);
+
+        if (icon_info != null)
+            return icon_info.load_icon();
+
+        return null;
+    }
+
+    private Gdk.Pixbuf? pixmap_to_pixbuf(Pixmap[] pixmaps) {
+        if (pixmaps == null || pixmaps.length == 0)
+            return null;
+
+        Pixmap pixmap = pixmaps[0];
+        uint8[] image_data = pixmap.bytes.copy();
+
+        for (int i = 0; i < pixmap.width * pixmap.height * 4; i += 4) {
+            uint8 alpha = image_data[i];
+            image_data[i] = image_data[i + 1];
+            image_data[i + 1] = image_data[i + 2];
+            image_data[i + 2] = image_data[i + 3];
+            image_data[i + 3] = alpha;
+        }
+
+        return new Gdk.Pixbuf.from_bytes(
+            new Bytes(image_data),
+            Gdk.Colorspace.RGB,
+            true,
+            8,
+            (int)pixmap.width,
+            (int)pixmap.height,
+            (int)(pixmap.width * 4)
+        );
+    }
+
+    public string to_json_string() {
+    	var generator = new Json.Generator();
+        generator.set_root(to_json());
+        return generator.to_data(null);
+    }
+
+    internal Json.Node to_json() {
+        return new Json.Builder()
+            .begin_object()
+            .set_member_name("item_id").add_string_value(item_id)
+            .set_member_name("id").add_string_value(id)
+            .set_member_name("bus_name").add_string_value(proxy.g_name)
+            .set_member_name("object_path").add_string_value(proxy.g_object_path)
+            .set_member_name("title").add_string_value(title)
+            .set_member_name("status").add_string_value(status.to_nick())
+            .set_member_name("category").add_string_value(category.to_nick())
+            .set_member_name("tooltip").add_string_value(tooltip_markup)
+            .set_member_name("icon_theme_path").add_string_value(proxy.IconThemePath)
+            .set_member_name("icon_name").add_string_value(icon_name)
+            .set_member_name("menu_path").add_string_value(proxy.Menu)
+            .set_member_name("is_menu").add_boolean_value(is_menu)
+            .end_object()
+            .get_root();
+    }
+}
+}
diff --git a/tray/src/watcher.vala b/tray/src/watcher.vala
new file mode 100644
index 0000000..974cd02
--- /dev/null
+++ b/tray/src/watcher.vala
@@ -0,0 +1,59 @@
+namespace AstalTray {
+[DBus (name="org.kde.StatusNotifierWatcher")]
+internal class StatusNotifierWatcher : Object {
+    private HashTable<string, string> _items =
+        new HashTable<string, string>(str_hash, str_equal);
+
+    public string[] RegisteredStatusNotifierItems { owned get { return _items.get_values_as_ptr_array().data; } }
+    public bool IsStatusNotifierHostRegistered { get; default = true; }
+    public int ProtocolVersion { get; default = 0; }
+
+    public signal void StatusNotifierItemRegistered(string service);
+    public signal void StatusNotifierItemUnregistered(string service);
+    public signal void StatusNotifierHostRegistered();
+    public signal void StatusNotifierHostUnregistered();
+
+    public void RegisterStatusNotifierItem(string service, BusName sender) throws DBusError, IOError {
+        string busName;
+        string path;
+        if (service[0] == '/') {
+            path = service;
+            busName = sender;
+        } else {
+            busName = service;
+            path = "/StatusNotifierItem";
+        }
+
+        Bus.get_sync(BusType.SESSION).signal_subscribe(
+            null,
+            "org.freedesktop.DBus",
+            "NameOwnerChanged",
+            null,
+            null,
+            DBusSignalFlags.NONE,
+            (connection, sender_name, path, interface_name, signal_name, parameters) => {
+                string name = null;
+                string new_owner = null;
+                string old_owner = null;
+                parameters.get("(sss)", &name, &old_owner, &new_owner);
+                if (new_owner == "" && _items.contains(old_owner)) {
+                    string full_path = _items.take(old_owner);
+                    StatusNotifierItemUnregistered(full_path);
+                }
+            }
+        );
+
+        _items.set(busName, busName+path);
+        StatusNotifierItemRegistered(busName+path);
+    }
+
+    public void RegisterStatusNotifierHost(string service) throws DBusError, IOError {
+        /* NOTE:
+            usually the watcher should keep track of registered host
+            but some tray applications do net register their trayitem properly
+            when hosts register/deregister. This is fixed by setting isHostRegistered
+            always to true, this also make host handling logic unneccessary.
+         */
+    }
+}
+}
diff --git a/tray/version b/tray/version
new file mode 100644
index 0000000..6e8bf73
--- /dev/null
+++ b/tray/version
@@ -0,0 +1 @@
+0.1.0