create separated wrapper for pin action

src/app/browser/window/action/append.rs

@@ -4,7 +4,7 @@ use gtk::{
     prelude::ActionExt,
 };
 
-/// [SimpleAction](https://docs.gtk.org/gio/class.SimpleAction.html) wrapper for `Append` action of `Browser` group
+/// [SimpleAction](https://docs.gtk.org/gio/class.SimpleAction.html) wrapper for `Append` action of `Window` group
 pub struct Append {
     gobject: SimpleAction,
 }

src/app/browser/window/action/pin.rs

@@ -0,0 +1,80 @@
+use gtk::{
+    gio::SimpleAction,
+    glib::{uuid_string_random, GString},
+    prelude::{ActionExt, ToVariant},
+};
+
+// Defaults
+
+/// C-compatible variant type
+const DEFAULT_STATE: i32 = -1;
+
+/// [SimpleAction](https://docs.gtk.org/gio/class.SimpleAction.html) wrapper for `Pin` action of `Window` group
+pub struct Pin {
+    gobject: SimpleAction,
+}
+
+impl Pin {
+    // Constructors
+
+    /// Create new `Self`
+    pub fn new() -> Self {
+        Self {
+            gobject: SimpleAction::new_stateful(
+                &uuid_string_random(),
+                None,
+                &DEFAULT_STATE.to_variant(),
+            ),
+        }
+    }
+
+    // Actions
+
+    /// Change action [state](https://docs.gtk.org/gio/method.SimpleAction.set_state.html)
+    /// * set `DEFAULT_STATE` on `None`
+    pub fn change_state(&self, state: Option<i32>) {
+        self.gobject.change_state(
+            &match state {
+                Some(value) => value,
+                None => DEFAULT_STATE,
+            }
+            .to_variant(),
+        )
+    }
+
+    // Events
+
+    /// Define callback function for
+    /// [SimpleAction::activate](https://docs.gtk.org/gio/signal.SimpleAction.activate.html) signal
+    pub fn connect_activate(&self, callback: impl Fn(Option<i32>) + 'static) {
+        let state = self.state();
+        self.gobject.connect_activate(move |_, _| callback(state));
+    }
+
+    // Getters
+
+    pub fn state(&self) -> Option<i32> {
+        let state = self
+            .gobject
+            .state()
+            .expect("State value required for this action")
+            .get::<i32>()
+            .expect("Parameter type does not match `i32`");
+
+        if state != DEFAULT_STATE {
+            Some(state)
+        } else {
+            None
+        }
+    }
+
+    /// Get reference to [SimpleAction](https://docs.gtk.org/gio/class.SimpleAction.html) GObject
+    pub fn gobject(&self) -> &SimpleAction {
+        &self.gobject
+    }
+
+    /// Get auto-generated [action name](https://docs.gtk.org/gio/property.SimpleAction.name.html)
+    pub fn id(&self) -> GString {
+        self.gobject.name()
+    }
+}