implement shared cancellable reference

src/app/browser/window/tab/item/page.rs

@@ -28,7 +28,7 @@ use gtk::{
         gformat, GString, Priority, Regex, RegexCompileFlags, RegexMatchFlags, Uri, UriFlags,
         UriHideFlags,
     },
-    prelude::{EditableExt, SocketClientExt},
+    prelude::{CancellableExt, EditableExt, SocketClientExt},
 };
 use sqlite::Transaction;
 use std::{rc::Rc, time::Duration};
@@ -378,10 +378,19 @@ impl Page {
 
     // Private helpers
 
-    // @TODO move somewhere outside
+    // @TODO move outside
     fn load_gemini(&self, uri: Uri, is_history: bool) {
+        // Cancel previous client operations
+        {
+            let cancellable = self.client.cancellable.take();
+            if !cancellable.is_cancelled() {
+                cancellable.cancel();
+            }
+        }
+
         // Init new Cancellable
         let cancellable = Cancellable::new();
+        self.client.cancellable.replace(cancellable.clone());
 
         // Init shared clones
         let update = self.browser_action.update.clone();

src/app/browser/window/tab/item/page/client.rs

@@ -1,11 +1,18 @@
-/// Single client instance holder for `Page` object.
+use gtk::gio::Cancellable;
+use std::cell::RefCell;
+
+/// Multi-client holder for single `Page` object
 ///
-/// unlike new client instance init on every page open,
-/// this solution provide additional client-side features
-/// e.g. session cache management on certificate change in runtime
+/// Unlike init new client instance on every page load,
+/// this struct creates single holder for different protocol drivers;
+/// it also provides additional client-side features
+/// e.g. session resumption or multi-thread connection management (depending of client type selected)
 pub struct Client {
+    // Shared reference to cancel async operations
+    pub cancellable: RefCell<Cancellable>,
+    // Clients
     pub gemini: gemini::Client,
-    // other supported clients here..
+    // other clients..
 }
 
 impl Client {
@@ -14,6 +21,7 @@ impl Client {
     /// Create new `Self`
     pub fn new() -> Self {
         Self {
+            cancellable: RefCell::new(Cancellable::new()),
             gemini: gemini::Client::new(),
         }
     }