Support --duration close timer for windows (#884)

CHANGELOG.md

@@ -19,6 +19,7 @@ All notable changes to eww will be listed here, starting at changes since versio
 - Add `EWW_TIME` magic variable (By: Erenoit)
 - Add trigonometric functions (`sin`, `cos`, `tan`, `cot`) and degree/radian conversions (`degtorad`, `radtodeg`) (By: end-4)
 - Add `substring` function to simplexpr
+- Add `--duration` flag to `eww open`
 
 ## [0.4.0] (04.09.2022)
 

crates/eww/Cargo.toml

@@ -50,8 +50,7 @@ simple-signal = "1.1"
 unescape = "0.1"
 
 tokio = { version = "1.31.0", features = ["full"] }
-futures-core = "0.3.28"
-futures-util = "0.3.28"
+futures = "0.3.28"
 tokio-util = "0.7.8"
 
 sysinfo = "0.29.8"

crates/eww/src/app.rs

@@ -55,6 +55,7 @@ pub enum DaemonCommand {
         anchor: Option<AnchorPoint>,
         screen: Option<MonitorIdentifier>,
         should_toggle: bool,
+        duration: Option<std::time::Duration>,
         sender: DaemonResponseSender,
     },
     CloseWindows {
@@ -114,6 +115,9 @@ pub struct App<B> {
     pub app_evt_send: UnboundedSender<DaemonCommand>,
     pub script_var_handler: ScriptVarHandlerHandle,
 
+    /// Senders that will cancel a windows auto-close timer when started with --duration.
+    pub window_close_timer_abort_senders: HashMap<String, futures::channel::oneshot::Sender<()>>,
+
     pub paths: EwwPaths,
 }
 
@@ -181,20 +185,27 @@ impl<B: DisplayBackend> App<B> {
                             if should_toggle && self.open_windows.contains_key(w) {
                                 self.close_window(w)
                             } else {
-                                self.open_window(w, None, None, None, None)
+                                self.open_window(w, None, None, None, None, None)
                             }
                         })
                         .filter_map(Result::err);
                     sender.respond_with_error_list(errors)?;
                 }
-                DaemonCommand::OpenWindow { window_name, pos, size, anchor, screen: monitor, should_toggle, sender } => {
+                DaemonCommand::OpenWindow {
+                    window_name,
+                    pos,
+                    size,
+                    anchor,
+                    screen: monitor,
+                    should_toggle,
+                    duration,
+                    sender,
+                } => {
                     let is_open = self.open_windows.contains_key(&window_name);
-                    let result = if !is_open {
-                        self.open_window(&window_name, pos, size, monitor, anchor)
-                    } else if should_toggle {
+                    let result = if should_toggle && is_open {
                         self.close_window(&window_name)
                     } else {
-                        Ok(())
+                        self.open_window(&window_name, pos, size, monitor, anchor, duration)
                     };
                     sender.respond_with_result(result)?;
                 }
@@ -294,6 +305,9 @@ impl<B: DisplayBackend> App<B> {
 
     /// Close a window and do all the required cleanups in the scope_graph and script_var_handler
     fn close_window(&mut self, window_name: &str) -> Result<()> {
+        if let Some(old_abort_send) = self.window_close_timer_abort_senders.remove(window_name) {
+            _ = old_abort_send.send(());
+        }
         let eww_window = self
             .open_windows
             .remove(window_name)
@@ -320,11 +334,13 @@ impl<B: DisplayBackend> App<B> {
         size: Option<Coords>,
         monitor: Option<MonitorIdentifier>,
         anchor: Option<AnchorPoint>,
+        duration: Option<std::time::Duration>,
     ) -> Result<()> {
         self.failed_windows.remove(window_name);
         log::info!("Opening window {}", window_name);
 
         // if an instance of this is already running, close it
+        // TODO make reopening optional via a --no-reopen flag?
         if self.open_windows.contains_key(window_name) {
             self.close_window(window_name)?;
         }
@@ -380,6 +396,34 @@ impl<B: DisplayBackend> App<B> {
                 }
             }));
 
+            if let Some(duration) = duration {
+                let app_evt_sender = self.app_evt_send.clone();
+                let window_name = window_name.to_string();
+
+                let (abort_send, abort_recv) = futures::channel::oneshot::channel();
+
+                glib::MainContext::default().spawn_local({
+                    let window_name = window_name.clone();
+                    async move {
+                        tokio::select! {
+                            _ = glib::timeout_future(duration) => {
+                                let (response_sender, mut response_recv) = daemon_response::create_pair();
+                                let command = DaemonCommand::CloseWindows { windows: vec![window_name], sender: response_sender };
+                                if let Err(err) = app_evt_sender.send(command) {
+                                    log::error!("Error sending close window command to daemon after gtk window destroy event: {}", err);
+                                }
+                                _ = response_recv.recv().await;
+                            }
+                            _ = abort_recv => {}
+                        }
+                    }
+                });
+
+                if let Some(old_abort_send) = self.window_close_timer_abort_senders.insert(window_name, abort_send) {
+                    _ = old_abort_send.send(());
+                }
+            }
+
             self.open_windows.insert(window_name.to_string(), eww_window);
         };
 
@@ -407,7 +451,7 @@ impl<B: DisplayBackend> App<B> {
         let window_names: Vec<String> =
             self.open_windows.keys().cloned().chain(self.failed_windows.iter().cloned()).dedup().collect();
         for window_name in &window_names {
-            self.open_window(window_name, None, None, None, None)?;
+            self.open_window(window_name, None, None, None, None, None)?;
         }
         Ok(())
     }

crates/eww/src/opts.rs

@@ -120,6 +120,10 @@ pub enum ActionWithServer {
         /// If the window is already open, close it instead
         #[arg(long = "toggle")]
         should_toggle: bool,
+
+        /// Automatically close the window after a specified amount of time, i.e.: 1s
+        #[arg(long, value_parser=parse_duration)]
+        duration: Option<std::time::Duration>,
     },
 
     /// Open multiple windows at once.
@@ -218,14 +222,15 @@ impl ActionWithServer {
             ActionWithServer::OpenMany { windows, should_toggle } => {
                 return with_response_channel(|sender| app::DaemonCommand::OpenMany { windows, should_toggle, sender });
             }
-            ActionWithServer::OpenWindow { window_name, pos, size, screen, anchor, should_toggle } => {
+            ActionWithServer::OpenWindow { window_name, pos, size, screen, anchor, should_toggle, duration } => {
                 return with_response_channel(|sender| app::DaemonCommand::OpenWindow {
                     window_name,
                     pos,
                     size,
                     anchor,
                     screen,
                     should_toggle,
+                    duration,
                     sender,
                 })
             }
@@ -254,3 +259,7 @@ where
     let (sender, recv) = daemon_response::create_pair();
     (f(sender), Some(recv))
 }
+
+fn parse_duration(s: &str) -> Result<std::time::Duration, simplexpr::dynval::ConversionError> {
+    DynVal::from_string(s.to_owned()).as_duration()
+}

crates/eww/src/server.rs

@@ -84,6 +84,7 @@ pub fn initialize_server<B: DisplayBackend>(
         css_provider: gtk::CssProvider::new(),
         script_var_handler,
         app_evt_send: ui_send.clone(),
+        window_close_timer_abort_senders: HashMap::new(),
         paths,
     };