working jump to original

data/resources/stylesheet/_room_history.scss

@@ -106,6 +106,11 @@ room-title {
     }
   }
 
+  &.jump-highlight {
+    animation: jump-highlight 1200ms ease-out;
+    box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent-bg-color) 45%, transparent);
+  }
+
   button.sender-avatar {
     padding: 5px;
 
@@ -131,6 +136,15 @@ room-title {
   }
 }
 
+@keyframes jump-highlight {
+  0% {
+    box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent-bg-color) 55%, transparent);
+  }
+  100% {
+    box-shadow: inset 0 0 0 0px transparent;
+  }
+}
+
 message-sender {
   @include vendor.focus-ring($offset: -1px, $focus-state: ':focus-within');
 

src/session_view/room_history/message_row/content.rs

@@ -198,6 +198,7 @@ impl MessageContent {
                         replied_to_event.content.can_show_header(),
                     );
                     reply.set_related_content_sender(replied_to_sender.upcast_ref());
+                    reply.set_related_event_id(event.reply_to_id());
                     reply.related_content().build_content(
                         replied_to_event.content,
                         ContentFormat::Compact,

src/session_view/room_history/message_row/reply.blp

@@ -12,6 +12,10 @@ template $ContentMessageReply: Gtk.Grid {
       "quote",
     ]
 
+    Gtk.GestureClick {
+      released => $handle_related_content_click() swapped;
+    }
+
     accessibility {
       label: _("In Reply To");
     }

src/session_view/room_history/message_row/reply.rs

@@ -1,7 +1,11 @@
 use adw::{prelude::*, subclass::prelude::*};
 use gtk::glib;
+use matrix_sdk_ui::timeline::TimelineEventItemId;
+use ruma::OwnedEventId;
+use tracing::error;
 
 use crate::session::User;
+use crate::utils::matrix::ext_traits::TimelineEventItemIdExt;
 
 mod imp {
     use std::cell::{Cell, RefCell};
@@ -20,6 +24,7 @@ mod imp {
         related_content: TemplateChild<adw::Bin>,
         #[template_child]
         content: TemplateChild<adw::Bin>,
+        related_event_id: RefCell<Option<OwnedEventId>>,
         /// Whether to show the header of the related content.
         #[property(get, set = Self::set_show_related_content_header, explicit_notify)]
         show_related_content_header: Cell<bool>,
@@ -34,6 +39,7 @@ mod imp {
 
         fn class_init(klass: &mut Self::Class) {
             Self::bind_template(klass);
+            Self::bind_template_callbacks(klass);
         }
 
         fn instance_init(obj: &InitializingObject<Self>) {
@@ -53,7 +59,13 @@ mod imp {
     impl WidgetImpl for MessageReply {}
     impl GridImpl for MessageReply {}
 
+    #[gtk::template_callbacks]
     impl MessageReply {
+        /// Set the ID of the related event.
+        pub(super) fn set_related_event_id(&self, event_id: Option<OwnedEventId>) {
+            self.related_event_id.replace(event_id);
+        }
+
         /// Set whether to show the header of the related content.
         fn set_show_related_content_header(&self, show: bool) {
             if self.show_related_content_header.get() == show {
@@ -87,6 +99,24 @@ mod imp {
         pub(super) fn content(&self) -> &adw::Bin {
             self.content.as_ref()
         }
+
+        /// Handle a click on the replied-to content.
+        #[template_callback]
+        fn handle_related_content_click(&self) {
+            let Some(event_id) = self.related_event_id.borrow().clone() else {
+                return;
+            };
+            if self
+                .obj()
+                .activate_action(
+                    "room-history.scroll-to-event",
+                    Some(&TimelineEventItemId::EventId(event_id).to_variant()),
+                )
+                .is_err()
+            {
+                error!("Could not activate `room-history.scroll-to-event` action");
+            }
+        }
     }
 }
 
@@ -107,6 +137,11 @@ impl MessageReply {
         self.imp().set_related_content_sender(user);
     }
 
+    /// Set the ID of the related event.
+    pub(crate) fn set_related_event_id(&self, event_id: Option<OwnedEventId>) {
+        self.imp().set_related_event_id(event_id);
+    }
+
     /// The widget containing the replied-to content.
     pub(crate) fn related_content(&self) -> &adw::Bin {
         self.imp().related_content()

src/session_view/room_history/mod.rs

@@ -54,6 +54,10 @@ use crate::{
 const SCROLL_TIMEOUT: Duration = Duration::from_millis(500);
 /// The time to wait before considering that messages on a screen where read.
 const READ_TIMEOUT: Duration = Duration::from_secs(5);
+/// The time to keep the jump highlight on a message.
+const JUMP_HIGHLIGHT_DURATION: Duration = Duration::from_millis(1200);
+/// The CSS class used for jump highlighting.
+const JUMP_HIGHLIGHT_CLASS: &str = "jump-highlight";
 
 mod imp {
     use std::{
@@ -120,6 +124,8 @@ mod imp {
         grouping_model: OnceCell<GroupingListModel>,
         scroll_timeout: RefCell<Option<glib::SourceId>>,
         read_timeout: RefCell<Option<glib::SourceId>>,
+        jump_highlight_timeout: RefCell<Option<glib::SourceId>>,
+        jump_highlight_key: RefCell<Option<TimelineEventItemId>>,
         room_handler: RefCell<Option<glib::SignalHandlerId>>,
         permissions_handlers: RefCell<Vec<glib::SignalHandlerId>>,
         membership_handler: RefCell<Option<glib::SignalHandlerId>>,
@@ -611,6 +617,16 @@ mod imp {
             if let Some(event) = item.downcast_ref::<Event>() {
                 let child = list_item.child_or_else::<EventRow>(|| EventRow::new(&self.obj()));
                 child.set_event(Some(event.clone()));
+                if self
+                    .jump_highlight_key
+                    .borrow()
+                    .as_ref()
+                    .is_some_and(|key| event.matches_identifier(key))
+                {
+                    child.add_css_class(JUMP_HIGHLIGHT_CLASS);
+                } else {
+                    child.remove_css_class(JUMP_HIGHLIGHT_CLASS);
+                }
             } else if let Some(virtual_item) = item.downcast_ref::<VirtualItem>() {
                 set_virtual_item_child(list_item, virtual_item);
             } else if let Some(group) = item.downcast_ref::<GroupingListGroup>() {
@@ -836,11 +852,78 @@ mod imp {
 
             if let Some(pos) = timeline.find_event_position(key) {
                 let pos = pos as u32;
+                self.set_is_auto_scrolling(false);
+                self.set_sticky(false);
                 self.listview
                     .scroll_to(pos, gtk::ListScrollFlags::FOCUS, None);
+                self.schedule_jump_highlight(key.clone());
             }
         }
 
+        fn schedule_jump_highlight(&self, key: TimelineEventItemId) {
+            glib::idle_add_local_once(clone!(
+                #[weak(rename_to = imp)]
+                self,
+                move || {
+                    imp.highlight_event_row(&key);
+                }
+            ));
+        }
+
+        fn highlight_event_row(&self, key: &TimelineEventItemId) {
+            self.clear_jump_highlight();
+
+            let Some(row) = self.find_event_row(key) else {
+                return;
+            };
+
+            row.add_css_class(JUMP_HIGHLIGHT_CLASS);
+            self.jump_highlight_key.replace(Some(key.clone()));
+
+            let timeout_id = glib::timeout_add_local_once(JUMP_HIGHLIGHT_DURATION, clone!(
+                #[weak(rename_to = imp)]
+                self,
+                move || {
+                    imp.clear_jump_highlight();
+                }
+            ));
+            self.jump_highlight_timeout.replace(Some(timeout_id));
+        }
+
+        fn clear_jump_highlight(&self) {
+            if let Some(timeout_id) = self.jump_highlight_timeout.take() {
+                timeout_id.remove();
+            }
+
+            let Some(key) = self.jump_highlight_key.take() else {
+                return;
+            };
+            if let Some(row) = self.find_event_row(&key) {
+                row.remove_css_class(JUMP_HIGHLIGHT_CLASS);
+            }
+        }
+
+        fn find_event_row(&self, key: &TimelineEventItemId) -> Option<EventRow> {
+            let listview = &*self.listview;
+            let mut child = listview.first_child();
+
+            while let Some(item) = child {
+                if let Some(event_row) = item
+                    .first_child()
+                    .and_downcast::<EventRow>()
+                    && event_row
+                        .event()
+                        .is_some_and(|event| event.matches_identifier(key))
+                {
+                    return Some(event_row);
+                }
+
+                child = item.next_sibling();
+            }
+
+            None
+        }
+
         /// The ancestor window of the room history.
         fn parent_window(&self) -> Option<Window> {
             self.obj().root().and_downcast()