feat: new focused window module

src/bar.rs

@@ -48,14 +48,14 @@ fn load_modules(
     right: &gtk::Box,
     app: &Application,
     config: Config,
-    output_name: &str
+    output_name: &str,
 ) {
     if let Some(modules) = config.left {
         let info = ModuleInfo {
             app,
             location: ModuleLocation::Left,
             bar_position: &config.position,
-            output_name
+            output_name,
         };
 
         add_modules(left, modules, info);
@@ -66,7 +66,7 @@ fn load_modules(
             app,
             location: ModuleLocation::Center,
             bar_position: &config.position,
-            output_name
+            output_name,
         };
 
         add_modules(center, modules, info);
@@ -77,7 +77,7 @@ fn load_modules(
             app,
             location: ModuleLocation::Right,
             bar_position: &config.position,
-            output_name
+            output_name,
         };
 
         add_modules(right, modules, info);
@@ -122,6 +122,11 @@ fn add_modules(content: &gtk::Box, modules: Vec<ModuleConfig>, info: ModuleInfo)
                 widget.set_widget_name("script");
                 content.add(&widget);
             }
+            ModuleConfig::Focused(module) => {
+                let widget = module.into_widget(&info);
+                widget.set_widget_name("focused");
+                content.add(&widget);
+            }
         }
     }
 }
@@ -137,8 +142,16 @@ fn setup_layer_shell(win: &ApplicationWindow, monitor: &Monitor, position: &BarP
     gtk_layer_shell::set_margin(win, gtk_layer_shell::Edge::Left, 0);
     gtk_layer_shell::set_margin(win, gtk_layer_shell::Edge::Right, 0);
 
-    gtk_layer_shell::set_anchor(win, gtk_layer_shell::Edge::Top, position == &BarPosition::Top);
-    gtk_layer_shell::set_anchor(win, gtk_layer_shell::Edge::Bottom, position == &BarPosition::Bottom);
+    gtk_layer_shell::set_anchor(
+        win,
+        gtk_layer_shell::Edge::Top,
+        position == &BarPosition::Top,
+    );
+    gtk_layer_shell::set_anchor(
+        win,
+        gtk_layer_shell::Edge::Bottom,
+        position == &BarPosition::Bottom,
+    );
     gtk_layer_shell::set_anchor(win, gtk_layer_shell::Edge::Left, true);
     gtk_layer_shell::set_anchor(win, gtk_layer_shell::Edge::Right, true);
 }

src/config.rs

@@ -1,4 +1,5 @@
 use crate::modules::clock::ClockModule;
+use crate::modules::focused::FocusedModule;
 use crate::modules::launcher::LauncherModule;
 use crate::modules::mpd::MpdModule;
 use crate::modules::script::ScriptModule;
@@ -19,13 +20,14 @@ pub enum ModuleConfig {
     SysInfo(SysInfoModule),
     Launcher(LauncherModule),
     Script(ScriptModule),
+    Focused(FocusedModule),
 }
 
-#[derive(Debug, Deserialize, Clone, PartialEq)]
+#[derive(Debug, Deserialize, Clone, PartialEq, Eq)]
 #[serde(rename_all = "kebab-case")]
 pub enum BarPosition {
     Top,
-    Bottom
+    Bottom,
 }
 
 impl Default for BarPosition {
@@ -83,3 +85,10 @@ impl Config {
         })
     }
 }
+
+pub const fn default_false() -> bool {
+    false
+}
+pub const fn default_true() -> bool {
+    true
+}

src/main.rs

@@ -1,24 +1,21 @@
 mod bar;
 mod collection;
 mod config;
+mod icon;
 mod modules;
 mod popup;
 mod style;
+mod sway;
 
 use crate::bar::create_bar;
 use crate::config::Config;
 use crate::style::load_css;
+use crate::sway::SwayOutput;
 use dirs::config_dir;
 use gtk::prelude::*;
 use gtk::{gdk, Application};
 use ksway::client::Client;
 use ksway::IpcCommand;
-use serde::Deserialize;
-
-#[derive(Deserialize)]
-struct SwayOutput {
-    name: String,
-}
 
 #[tokio::main]
 async fn main() {
@@ -27,8 +24,11 @@ async fn main() {
         .build();
 
     let mut sway_client = Client::connect().expect("Failed to connect to Sway IPC");
-    let outputs = sway_client.ipc(IpcCommand::GetOutputs).expect("Failed to get Sway outputs");
-    let outputs = serde_json::from_slice::<Vec<SwayOutput>>(&outputs).expect("Failed to deserialize outputs message from Sway IPC");
+    let outputs = sway_client
+        .ipc(IpcCommand::GetOutputs)
+        .expect("Failed to get Sway outputs");
+    let outputs = serde_json::from_slice::<Vec<SwayOutput>>(&outputs)
+        .expect("Failed to deserialize outputs message from Sway IPC");
 
     app.connect_activate(move |app| {
         let config = Config::load().unwrap_or_default();
@@ -42,7 +42,10 @@ async fn main() {
         let num_monitors = display.n_monitors();
         for i in 0..num_monitors {
             let monitor = display.monitor(i).unwrap();
-            let monitor_name = &outputs.get(i as usize).expect("GTK monitor output differs from Sway's").name;
+            let monitor_name = &outputs
+                .get(i as usize)
+                .expect("GTK monitor output differs from Sway's")
+                .name;
 
             let config = config.monitors.as_ref().map_or(&config, |monitor_config| {
                 monitor_config.get(i as usize).unwrap_or(&config)

src/modules/clock/mod.rs

@@ -30,7 +30,12 @@ impl Module<Button> for ClockModule {
     fn into_widget(self, info: &ModuleInfo) -> Button {
         let button = Button::new();
 
-        let popup = Popup::new("popup-clock", info.app, Orientation::Vertical, info.bar_position);
+        let popup = Popup::new(
+            "popup-clock",
+            info.app,
+            Orientation::Vertical,
+            info.bar_position,
+        );
         popup.add_clock_widgets();
 
         button.show_all();

src/modules/focused.rs

@@ -0,0 +1,97 @@
+use crate::icon;
+use crate::modules::{Module, ModuleInfo};
+use crate::sway::node::get_open_windows;
+use crate::sway::WindowEvent;
+use glib::Continue;
+use gtk::prelude::*;
+use gtk::{IconTheme, Image, Label, Orientation};
+use ksway::{Client, IpcEvent};
+use serde::Deserialize;
+use tokio::task::spawn_blocking;
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct FocusedModule {
+    #[serde(default = "crate::config::default_true")]
+    show_icon: bool,
+    #[serde(default = "crate::config::default_true")]
+    show_title: bool,
+
+    #[serde(default = "default_icon_size")]
+    icon_size: i32,
+    icon_theme: Option<String>,
+}
+
+const fn default_icon_size() -> i32 {
+    32
+}
+
+impl Module<gtk::Box> for FocusedModule {
+    fn into_widget(self, _info: &ModuleInfo) -> gtk::Box {
+        let icon_theme = IconTheme::new();
+
+        if let Some(theme) = self.icon_theme {
+            icon_theme.set_custom_theme(Some(&theme));
+        }
+
+        let container = gtk::Box::new(Orientation::Horizontal, 5);
+
+        let icon = Image::builder().name("icon").build();
+        let label = Label::builder().name("label").build();
+
+        container.add(&icon);
+        container.add(&label);
+
+        let mut sway = Client::connect().unwrap();
+
+        let srx = sway.subscribe(vec![IpcEvent::Window]).unwrap();
+        let (tx, rx) = glib::MainContext::channel(glib::PRIORITY_DEFAULT);
+
+        let focused = get_open_windows(&mut sway)
+            .into_iter()
+            .find(|node| node.focused);
+
+        if let Some(focused) = focused {
+            tx.send(focused).unwrap();
+        }
+
+        spawn_blocking(move || loop {
+            while let Ok((_, payload)) = srx.try_recv() {
+                let payload: WindowEvent = serde_json::from_slice(&payload).unwrap();
+
+                let update = match payload.change.as_str() {
+                    "focus" => true,
+                    "title" => payload.container.focused,
+                    _ => false,
+                };
+
+                if update {
+                    tx.send(payload.container).unwrap();
+                }
+            }
+            sway.poll().unwrap();
+        });
+
+        {
+            rx.attach(None, move |node| {
+                let value = node
+                    .name
+                    .as_deref()
+                    .unwrap_or_else(|| node.get_id());
+
+                let pixbuf = icon::get_icon(&icon_theme, node.get_id(), self.icon_size);
+
+                if self.show_icon {
+                    icon.set_pixbuf(pixbuf.as_ref());
+                }
+
+                if self.show_title {
+                    label.set_label(value);
+                }
+
+                Continue(true)
+            });
+        }
+
+        container
+    }
+}

src/modules/launcher/item.rs

@@ -1,9 +1,9 @@
 use crate::collection::Collection;
-use crate::modules::launcher::icon::{find_desktop_file, get_icon};
-use crate::modules::launcher::node::SwayNode;
+use crate::icon::{find_desktop_file, get_icon};
 use crate::modules::launcher::popup::Popup;
 use crate::modules::launcher::FocusEvent;
 use crate::popup::PopupAlignment;
+use crate::sway::SwayNode;
 use gtk::prelude::*;
 use gtk::{Button, IconTheme, Image};
 use std::process::{Command, Stdio};

src/modules/launcher/mod.rs

@@ -1,13 +1,12 @@
-mod icon;
 mod item;
-mod node;
 mod popup;
 
 use crate::collection::Collection;
 use crate::modules::launcher::item::{ButtonConfig, LauncherItem, LauncherWindow};
-use crate::modules::launcher::node::{get_open_windows, SwayNode};
 use crate::modules::launcher::popup::Popup;
 use crate::modules::{Module, ModuleInfo};
+use crate::sway::node::get_open_windows;
+use crate::sway::{SwayNode, WindowEvent};
 use gtk::prelude::*;
 use gtk::{IconTheme, Orientation};
 use ksway::{Client, IpcEvent};
@@ -20,28 +19,14 @@ use tokio::task::spawn_blocking;
 #[derive(Debug, Deserialize, Clone)]
 pub struct LauncherModule {
     favorites: Option<Vec<String>>,
-    #[serde(default = "default_false")]
+    #[serde(default = "crate::config::default_false")]
     show_names: bool,
-    #[serde(default = "default_true")]
+    #[serde(default = "crate::config::default_true")]
     show_icons: bool,
 
     icon_theme: Option<String>,
 }
 
-const fn default_false() -> bool {
-    false
-}
-
-const fn default_true() -> bool {
-    true
-}
-
-#[derive(Debug, Deserialize)]
-struct WindowEvent {
-    change: String,
-    container: SwayNode,
-}
-
 #[derive(Debug)]
 pub enum FocusEvent {
     AppId(String),
@@ -181,7 +166,6 @@ impl Launcher {
             } else {
                 windows.get_mut(&window.id).unwrap().name = Some(name);
             }
-
         }
     }
 
@@ -207,7 +191,12 @@ impl Module<gtk::Box> for LauncherModule {
 
         let mut sway = Client::connect().unwrap();
 
-        let popup = Popup::new("popup-launcher", info.app, Orientation::Vertical, info.bar_position);
+        let popup = Popup::new(
+            "popup-launcher",
+            info.app,
+            Orientation::Vertical,
+            info.bar_position,
+        );
         let container = gtk::Box::new(Orientation::Horizontal, 0);
 
         let (ui_tx, mut ui_rx) = mpsc::channel(32);

src/modules/mod.rs

@@ -5,20 +5,21 @@
 /// Clicking the widget opens a popup containing the current time
 /// with second-level precision and a calendar.
 pub mod clock;
+pub mod focused;
 pub mod launcher;
 pub mod mpd;
 pub mod script;
 pub mod sysinfo;
 pub mod tray;
 pub mod workspaces;
 
+use crate::config::BarPosition;
 /// Shamelessly stolen from here:
 /// <https://github.com/zeroeightysix/rustbar/blob/master/src/modules/module.rs>
 use glib::IsA;
 use gtk::{Application, Widget};
 use serde::de::DeserializeOwned;
 use serde_json::Value;
-use crate::config::BarPosition;
 
 #[derive(Clone)]
 pub enum ModuleLocation {
@@ -31,7 +32,7 @@ pub struct ModuleInfo<'a> {
     pub app: &'a Application,
     pub location: ModuleLocation,
     pub bar_position: &'a BarPosition,
-    pub output_name: &'a str
+    pub output_name: &'a str,
 }
 
 pub trait Module<W>