mail/view: try cancel env fetch on Drop

Signed-off-by: Manos Pitsidianakis <manos@pitsidianak.is>

meli/src/mail/view.rs

@@ -130,7 +130,7 @@ impl MailView {
                 {
                     Ok(fut) => {
                         let mut handle = account.main_loop_handler.job_executor.spawn(
-                            "fetch-envelopes".into(),
+                            "fetch-envelope".into(),
                             fut,
                             account.is_async(),
                         );
@@ -154,6 +154,7 @@ impl MailView {
                             }
                         } else {
                             self.state = MailViewState::LoadingBody {
+                                main_loop_handler: self.main_loop_handler.clone(),
                                 handle,
                                 pending_action: pending_action.take(),
                             };
@@ -437,10 +438,9 @@ impl Component for MailView {
                 if self.active_jobs.contains(job_id) =>
             {
                 match self.state {
-                    MailViewState::LoadingBody {
-                        ref mut handle,
-                        pending_action: _,
-                    } if handle.job_id == *job_id => {
+                    MailViewState::LoadingBody { ref mut handle, .. }
+                        if handle.job_id == *job_id =>
+                    {
                         match handle.chan.try_recv() {
                             Err(_) => { /* Job was canceled */ }
                             Ok(None) => { /* something happened, perhaps a worker

meli/src/mail/view/state.rs

@@ -22,7 +22,9 @@
 use melib::{text::Truncate, Envelope, Error, Mail, Result};
 
 use super::{EnvelopeView, MailView, ViewSettings};
-use crate::{jobs::JoinHandle, mailbox_settings, Component, Context, ShortcutMaps, UIEvent};
+use crate::{
+    jobs::JoinHandle, mailbox_settings, Component, Context, ShortcutMaps, ThreadEvent, UIEvent,
+};
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum PendingReplyAction {
@@ -39,6 +41,7 @@ pub enum MailViewState {
         pending_action: Option<PendingReplyAction>,
     },
     LoadingBody {
+        main_loop_handler: crate::MainLoopHandler,
         handle: JoinHandle<Result<Vec<u8>>>,
         pending_action: Option<PendingReplyAction>,
     },
@@ -53,6 +56,23 @@ pub enum MailViewState {
     },
 }
 
+impl Drop for MailViewState {
+    fn drop(&mut self) {
+        let Self::LoadingBody {
+            handle,
+            main_loop_handler,
+            ..
+        } = self
+        else {
+            return;
+        };
+        let Some(ev) = handle.cancel() else {
+            return;
+        };
+        main_loop_handler.send(ThreadEvent::UIEvent(UIEvent::StatusEvent(ev)));
+    }
+}
+
 impl std::fmt::Display for MailViewState {
     fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
         match self {