view/thread: open earliest unread email instead of first in thread

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

meli/src/mail/listing.rs

@@ -1308,6 +1308,7 @@ impl Component for Listing {
                         env_hash,
                         thread_hash,
                         show_thread,
+                        go_to_first_unread,
                     }) => {
                         let (a, m) = self.component.coordinates();
                         self.view.unrealize(context);
@@ -1315,6 +1316,7 @@ impl Component for Listing {
                             (a, m, env_hash),
                             thread_hash,
                             Some(env_hash),
+                            go_to_first_unread,
                             if show_thread {
                                 None
                             } else {
@@ -3068,6 +3070,7 @@ pub enum ListingMessage {
         env_hash: EnvelopeHash,
         thread_hash: ThreadHash,
         show_thread: bool,
+        go_to_first_unread: bool,
     },
     UpdateView,
 }

meli/src/mail/listing/compact.rs

@@ -331,6 +331,7 @@ impl MailListingTrait for CompactListing {
                         thread_hash,
                         env_hash,
                         show_thread: true,
+                        go_to_first_unread: true,
                     },
                     context,
                 );
@@ -930,6 +931,7 @@ impl ListingTrait for CompactListing {
                             thread_hash,
                             env_hash,
                             show_thread: true,
+                            go_to_first_unread: true,
                         },
                         context,
                     );

meli/src/mail/listing/conversations.rs

@@ -238,6 +238,7 @@ impl MailListingTrait for ConversationsListing {
                         thread_hash,
                         env_hash,
                         show_thread: true,
+                        go_to_first_unread: true,
                     },
                     context,
                 );
@@ -666,6 +667,7 @@ impl ListingTrait for ConversationsListing {
                             thread_hash,
                             env_hash,
                             show_thread: true,
+                            go_to_first_unread: true,
                         },
                         context,
                     );

meli/src/mail/listing/plain.rs

@@ -297,6 +297,7 @@ impl MailListingTrait for PlainListing {
                         thread_hash,
                         env_hash,
                         show_thread: false,
+                        go_to_first_unread: false,
                     },
                     context,
                 );
@@ -648,6 +649,7 @@ impl ListingTrait for PlainListing {
                             thread_hash,
                             env_hash,
                             show_thread: false,
+                            go_to_first_unread: false,
                         },
                         context,
                     );

meli/src/mail/listing/thread.rs

@@ -730,6 +730,7 @@ impl ListingTrait for ThreadListing {
                             thread_hash,
                             env_hash,
                             show_thread: false,
+                            go_to_first_unread: false,
                         },
                         context,
                     );

meli/src/mail/view/thread.rs

@@ -81,6 +81,7 @@ impl ThreadView {
         coordinates: (AccountHash, MailboxHash, EnvelopeHash),
         thread_group: ThreadHash,
         expanded_hash: Option<EnvelopeHash>,
+        go_to_first_unread: bool,
         focus: Option<ThreadViewFocus>,
         context: &mut Context,
     ) -> Self {
@@ -105,7 +106,7 @@ impl ThreadView {
             use_color: context.settings.terminal.use_color(),
             ..Default::default()
         };
-        view.initiate(expanded_hash, context);
+        view.initiate(expanded_hash, go_to_first_unread, context);
         view.new_cursor_pos = view.new_expanded_pos;
         view
     }
@@ -130,7 +131,7 @@ impl ThreadView {
         };
 
         let expanded_hash = old_expanded_entry.as_ref().map(|e| e.msg_hash);
-        self.initiate(expanded_hash, context);
+        self.initiate(expanded_hash, false, context);
 
         let mut old_cursor = 0;
         let mut new_cursor = 0;
@@ -172,7 +173,12 @@ impl ThreadView {
         self.set_dirty(true);
     }
 
-    fn initiate(&mut self, expanded_hash: Option<EnvelopeHash>, context: &mut Context) {
+    fn initiate(
+        &mut self,
+        expanded_hash: Option<EnvelopeHash>,
+        go_to_first_unread: bool,
+        context: &mut Context,
+    ) {
         #[inline(always)]
         fn make_entry(
             i: (usize, ThreadNodeHash, usize),
@@ -210,11 +216,19 @@ impl ThreadView {
 
         let thread_iter = threads.thread_iter(self.thread_group);
         self.entries.clear();
+        let mut earliest_unread = 0;
+        let mut earliest_unread_entry = 0;
         for (line, (ind, thread_node_hash)) in thread_iter.enumerate() {
             let entry = if let Some(msg_hash) = threads.thread_nodes()[&thread_node_hash].message()
             {
                 let (is_seen, timestamp) = {
                     let env_ref = collection.get_env(msg_hash);
+                    if !env_ref.is_seen()
+                        && (earliest_unread == 0 || env_ref.timestamp < earliest_unread)
+                    {
+                        earliest_unread = env_ref.timestamp;
+                        earliest_unread_entry = self.entries.len();
+                    }
                     (env_ref.is_seen(), env_ref.timestamp)
                 };
                 make_entry(
@@ -248,6 +262,10 @@ impl ThreadView {
                 .unwrap_or(0);
             self.expanded_pos = self.new_expanded_pos + 1;
         }
+        if go_to_first_unread && earliest_unread > 0 {
+            self.new_expanded_pos = earliest_unread_entry;
+            self.expanded_pos = earliest_unread_entry + 1;
+        }
 
         let height = 2 * self.entries.len() + 1;
         let mut width = 0;
@@ -1105,7 +1123,7 @@ impl Component for ThreadView {
             {
                 self.reversed = !self.reversed;
                 let expanded_hash = self.entries[self.expanded_pos].msg_hash;
-                self.initiate(Some(expanded_hash), context);
+                self.initiate(Some(expanded_hash), false, context);
                 self.dirty = true;
                 true
             }