From 0ac38ea73372479912f1aff171517a50a577ae04 Mon Sep 17 00:00:00 2001
From: alanpoon <brightshadowx@gmail.com>
Date: Tue, 20 Jan 2026 21:35:46 +0800
Subject: [PATCH 1/3] Add Collapsible PortalList in RoomScreen

---
 src/home/event_group.rs             | 896 ++++++++++++++++++++++++++++
 src/home/mod.rs                     |   2 +
 src/home/room_screen.rs             | 156 ++++-
 src/shared/fold_button_with_text.rs | 321 ++++++++++
 src/shared/mod.rs                   |   4 +
 src/shared/view_list.rs             |  55 ++
 6 files changed, 1431 insertions(+), 3 deletions(-)
 create mode 100644 src/home/event_group.rs
 create mode 100644 src/shared/fold_button_with_text.rs
 create mode 100644 src/shared/view_list.rs

diff --git a/src/home/event_group.rs b/src/home/event_group.rs
new file mode 100644
index 000000000..0d9c3df93
--- /dev/null
+++ b/src/home/event_group.rs
@@ -0,0 +1,896 @@
+use makepad_widgets::*;
+use matrix_sdk::ruma::{OwnedEventId, OwnedUserId, UserId};
+use matrix_sdk_ui::timeline::{
+    AnyOtherFullStateEventContent, EventTimelineItem, MembershipChange, MsgLikeContent, MsgLikeKind, TimelineItem, TimelineItemContent, TimelineItemKind
+};
+use rangemap::RangeMap;
+use std::{collections::HashMap, sync::Arc};
+use indexmap::IndexMap;
+
+use crate::home::room_read_receipt::{AvatarRowWidgetRefExt, MAX_VISIBLE_AVATARS_IN_READ_RECEIPT};
+
+// Minimum number of sequential small state events to collapse
+const MIN_GROUP_SIZE_FOR_COLLAPSE: usize = 3;
+// Maximum number of user names to display before coalescing
+const SUMMARY_LENGTH: usize = 4;
+
+live_design! {
+    use link::theme::*;
+    use link::shaders::*;
+    use link::widgets::*;
+
+    use crate::shared::styles::*;
+    use crate::home::room_read_receipt::*;
+    use crate::shared::fold_button_with_text::FoldButtonWithText;
+    use crate::shared::view_list::ViewList;
+
+    // FoldHeader for grouped small state events
+    // Follows the pattern from portal_list_auto_grouping skills doc
+    pub SmallStateGroupHeader = <FoldHeader> {
+        // Header: Always visible, shows summary and fold button
+        header: <View> {
+            width: Fill,
+            height: Fit
+            padding: { left: 7.0, top: 2.0, bottom: 2.0 }
+            flow: Down,
+            spacing: 7.0
+
+            <View> {
+                width: Fill,
+                height: Fit
+                user_event_avatar_row = <AvatarRow> {
+                    margin: { left: 10.0 },
+                }
+
+                summary_text = <Label> {
+                    width: Fill, height: Fit
+                    flow: RightWrap,
+                    padding: 0,
+                    draw_text: {
+                        wrap: Word,
+                        text_style: <THEME_FONT_REGULAR>{
+                            font_size: (SMALL_STATE_FONT_SIZE),
+                        },
+                        color: (SMALL_STATE_TEXT_COLOR)
+                    }
+                }
+            }
+
+            <View> {
+                width: Fill, height: Fit,
+                flow: Right,
+                align: {x: 0.5, y: 0.5},
+                padding: {top: 4},
+                fold_button = <FoldButtonWithText> {
+                    open_text: "Show More"
+                    close_text: "Show Less"
+                }
+            }
+        }
+
+        body: <View> {}
+    }
+}
+
+/// Represents a group of adjacent small state events that can be collapsed/expanded in the UI.
+///
+/// This struct encapsulates the grouping logic for small state events (membership changes,
+/// profile changes, etc.) that appear together in the timeline. Groups can be toggled
+/// between expanded (showing all individual events) and collapsed (showing a summary).
+///
+/// The group is identified by a range of timeline item indices, and contains a mapping
+/// of user events within that range for generating summaries.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct SmallStateGroup {
+    pub room_creator: Option<OwnedUserId>,
+    /// Mapping of user IDs to their events within this group.
+    ///
+    /// Key: The user ID who performed the state changes (OwnedUserId).
+    /// Value: Vector of UserEvent containing details about the specific state changes
+    /// for that user within this group.
+    ///
+    /// This simplified structure allows efficient lookup and summary generation.
+    /// Event ordering is preserved within each user's Vec<UserEvent> by their index field.
+    pub user_events_map: HashMap<OwnedUserId, Vec<UserEvent>>,
+
+    /// Cached summary text to avoid recomputation during rendering.
+    /// This is computed once when the group is created or modified.
+    pub cached_summary: Option<String>,
+
+    /// Cached list of user IDs for avatar display, pre-sorted and limited.
+    /// This avoids expensive sorting and extraction during rendering.
+    pub cached_avatar_user_ids: Option<Vec<OwnedUserId>>,
+}
+
+impl Default for SmallStateGroup {
+    fn default() -> Self {
+        Self {
+            room_creator: None,
+            user_events_map: HashMap::new(),
+            cached_summary: None,
+            cached_avatar_user_ids: None,
+        }
+    }
+}
+
+/// Combined state for managing small state groups
+#[derive(Default, Debug)]
+pub struct SmallStateGroupManager {
+    /// Map of small state groups by their index ranges, storing the group header's event_id
+    pub small_state_groups: RangeMap<usize, OwnedEventId>,
+    /// Map from event_id to actual SmallStateGroup data
+    pub groups_by_event_id: HashMap<OwnedEventId, SmallStateGroup>,
+}
+
+impl SmallStateGroupManager {
+    /// Recomputes the grouped small state view from a flat list of `UserEvent`s.
+    ///
+    /// This method:
+    /// - Clears and repopulates `small_state_groups` with fresh group ranges.
+    /// - Detects and builds a dedicated room-creation group for the creator's early events.
+    /// - Builds groups of consecutive small state events for other transitions.
+    pub fn compute_group_state(&mut self, small_state_events: Vec<UserEvent>) {
+        if small_state_events.is_empty() {
+            self.small_state_groups.clear();
+            self.groups_by_event_id.clear();
+            return;
+        }
+        self.small_state_groups.clear();
+        self.groups_by_event_id.clear();
+        // Track room creation state locally
+        let mut creation_events = Vec::new();
+        let mut creation_end_index = None;
+        let mut room_creator = None;
+        let mut regular_events = Vec::new();
+
+        for event in &small_state_events {
+            // Skip VirtualTimelineItem events - they should not be grouped
+            if event.transition == SmallStateType::VirtualTimelineItem {
+                continue;
+            }
+
+            if event.transition == SmallStateType::CreateRoom {
+                // Start tracking room creation
+                room_creator = event.sender.clone();
+                creation_end_index = Some(event.index);
+                creation_events.push(event.clone());
+            } else if let Some(last_creation_index) = creation_end_index {
+                if (event.transition == SmallStateType::Joined || event.transition == SmallStateType::ConfigureRoom) &&
+                   event.sender.as_ref() == room_creator.as_ref() &&
+                   event.index == last_creation_index + 1 {
+                    // Include consecutive room creator events in room creation group
+                    creation_end_index = Some(event.index);
+                    creation_events.push(event.clone());
+                } else {
+                    // End room creation group and process it
+                    if !creation_events.is_empty() {
+                        self.create_room_creation_group(&creation_events);
+                        creation_events.clear();
+                    }
+                    creation_end_index = None;
+                    room_creator = None;
+                    // Add current event to regular events
+                    regular_events.push(event.clone());
+                }
+            } else {
+                // Add to regular events
+                regular_events.push(event.clone());
+            }
+        }
+
+        // Process any remaining room creation group
+        if !creation_events.is_empty() {
+            self.create_room_creation_group(&creation_events);
+        }
+
+        // Group consecutive regular events
+        if regular_events.is_empty() {
+            return;
+        }
+        let mut current_group_events = vec![regular_events[0].clone()];
+        for i in 1..regular_events.len() {
+            let prev_index = regular_events[i - 1].index;
+            let current_index = regular_events[i].index;
+
+            // Check if current event is consecutive to the previous one
+            if current_index == prev_index + 1 {
+                // Add to current group
+                current_group_events.push(regular_events[i].clone());
+            } else {
+                // Process current group if it has enough events
+                if current_group_events.len() >= MIN_GROUP_SIZE_FOR_COLLAPSE {
+                    self.create_group_from_events(&current_group_events);
+                }
+
+                // Start a new group
+                current_group_events = vec![regular_events[i].clone()];
+            }
+        }
+
+        // Process the final group
+        if current_group_events.len() >= MIN_GROUP_SIZE_FOR_COLLAPSE {
+            self.create_group_from_events(&current_group_events);
+        }
+    }
+
+    /// Creates or updates a room-creation `SmallStateGroup` from the given creation events.
+    ///
+    /// The resulting group:
+    /// - Covers the contiguous range spanned by `events`.
+    /// - Is marked as `is_room_creation` and stores the room creator.
+    /// - Is registered in both `small_state_groups` and `groups_by_event_id`.
+    fn create_room_creation_group(&mut self, events: &[UserEvent]) {
+        if events.is_empty() {
+            return;
+        }
+
+        let start_index = events.first().unwrap().index;
+        let end_index = events.last().unwrap().index + 1;
+
+        let mut user_events_map = HashMap::new();
+        for event in events {
+            if let Some(effective_user_id) = get_effective_user_id(event) {
+                let user_events_vec: &mut Vec<UserEvent> = user_events_map.entry(effective_user_id).or_default();
+                if !user_events_vec.iter().any(|e| e.index == event.index) {
+                    user_events_vec.push(event.clone());
+                }
+            }
+        }
+
+        // Get or create a synthetic event_id if none exists
+        let header_event_id = events.first()
+            .and_then(|e| e.event_id.clone())
+            .unwrap_or_else(|| {
+                // Create synthetic event ID based on range
+                OwnedEventId::try_from(format!("$synthetic_{}_{}", start_index, end_index).as_str())
+                    .expect("Failed to create synthetic event ID")
+            });
+
+        self.small_state_groups.insert(start_index..end_index, header_event_id.clone());
+
+        use std::collections::hash_map::Entry;
+        match self.groups_by_event_id.entry(header_event_id) {
+            Entry::Occupied(mut entry) => {
+                let group = entry.get_mut();
+                group.room_creator = events.first().and_then(|e| e.sender.clone());
+                group.user_events_map = user_events_map;
+                group.cached_summary = None;
+                group.cached_avatar_user_ids = None;
+                group.update_cached_data();
+            }
+            Entry::Vacant(entry) => {
+                let mut group = SmallStateGroup {
+                    room_creator: events.first().and_then(|e| e.sender.clone()),
+                    user_events_map,
+                    cached_summary: None,
+                    cached_avatar_user_ids: None,
+                };
+                group.update_cached_data();
+                entry.insert(group);
+            }
+        }
+    }
+
+    /// Creates or updates a regular `SmallStateGroup` from consecutive `UserEvent`s.
+    ///
+    /// The resulting group:
+    /// - Covers the contiguous range spanned by `events`.
+    /// - Is registered in `small_state_groups` and `groups_by_event_id`.
+    /// - Is not marked as a room-creation group.
+    fn create_group_from_events(&mut self, events: &[UserEvent]) {
+        if events.is_empty() {
+            return;
+        }
+
+        let start_index = events.first().unwrap().index;
+        let end_index = events.last().unwrap().index + 1;
+
+        let mut user_events_map = HashMap::new();
+        for event in events {
+            if let Some(effective_user_id) = get_effective_user_id(event) {
+                let user_events_vec: &mut Vec<UserEvent> = user_events_map.entry(effective_user_id).or_default();
+                if !user_events_vec.iter().any(|e| e.index == event.index) {
+                    user_events_vec.push(event.clone());
+                }
+            }
+        }
+
+        // Get or create a synthetic event_id if none exists
+        let header_event_id = events.first()
+            .and_then(|e| e.event_id.clone())
+            .unwrap_or_else(|| {
+                // Create synthetic event ID based on range
+                OwnedEventId::try_from(format!("$synthetic_{}_{}", start_index, end_index).as_str())
+                    .expect("Failed to create synthetic event ID")
+            });
+
+        self.small_state_groups.insert(start_index..end_index, header_event_id.clone());
+
+        use std::collections::hash_map::Entry;
+        match self.groups_by_event_id.entry(header_event_id) {
+            Entry::Occupied(mut entry) => {
+                let group = entry.get_mut();
+                group.room_creator = None;
+                group.user_events_map = user_events_map;
+                group.cached_summary = None;
+                group.cached_avatar_user_ids = None;
+                group.update_cached_data();
+            }
+            Entry::Vacant(entry) => {
+                let mut group = SmallStateGroup {
+                    room_creator: None,
+                    user_events_map,
+                    cached_summary: None,
+                    cached_avatar_user_ids: None,
+                };
+                group.update_cached_data();
+                entry.insert(group);
+            }
+        }
+    }
+
+    /// Checks whether the portal-list item at `item_id` is part of a group.
+    ///
+    /// Returns `Some(Range)` if the item is within a group range, `None` otherwise.
+    /// The range indicates the full extent of the group in the timeline.
+    pub fn check_group_range(&self, item_id: usize) -> Option<std::ops::Range<usize>> {
+        self.small_state_groups.get_key_value(&item_id)
+            .map(|(range, _)| range.clone())
+    }
+
+    /// Gets the group metadata for a group starting at the given item_id.
+    ///
+    /// Returns `None` if there's no group starting at this item_id.
+    pub fn get_group_at_item_id(&self, item_id: usize) -> Option<&SmallStateGroup> {
+        self.small_state_groups
+            .iter()
+            .find(|(range, _)| range.start == item_id)
+            .and_then(|(_, event_id)| self.groups_by_event_id.get(event_id))
+    }
+}
+
+/// Represent Small state type.
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum SmallStateType {
+    CreateRoom,
+    ConfigureRoom,
+    Joined,
+    Left,
+    JoinedAndLeft,
+    LeftAndJoined,
+    InvitationRejected,
+    InvitationRevoked,
+    Invited,
+    Banned,
+    Unbanned,
+    Kicked,
+    ChangedName,
+    ChangedAvatar,
+    #[default]
+    NoChange,
+    ServerAcl,
+    ChangedPins,
+    MessageRemoved,
+    UnableToDecrypt,
+    HiddenEvent,
+    VirtualTimelineItem
+}
+
+impl From<MembershipChange> for SmallStateType {
+    fn from(change: MembershipChange) -> Self {
+        use matrix_sdk_ui::timeline::MembershipChange;
+        match change {
+            MembershipChange::Joined => SmallStateType::Joined,
+            MembershipChange::Left => SmallStateType::Left,
+            MembershipChange::Banned => SmallStateType::Banned,
+            MembershipChange::Unbanned => SmallStateType::Unbanned,
+            MembershipChange::Kicked => SmallStateType::Kicked,
+            MembershipChange::Invited => SmallStateType::Invited,
+            MembershipChange::KickedAndBanned => SmallStateType::Banned,
+            MembershipChange::InvitationAccepted => SmallStateType::Joined,
+            MembershipChange::InvitationRejected => SmallStateType::InvitationRejected,
+            MembershipChange::InvitationRevoked => SmallStateType::InvitationRevoked,
+            MembershipChange::Knocked => SmallStateType::HiddenEvent,
+            MembershipChange::KnockAccepted => SmallStateType::Joined,
+            MembershipChange::KnockRetracted => SmallStateType::HiddenEvent,
+            MembershipChange::None => SmallStateType::NoChange,
+            MembershipChange::Error => SmallStateType::NoChange,
+            MembershipChange::NotImplemented => SmallStateType::NoChange,
+            MembershipChange::KnockDenied => SmallStateType::HiddenEvent,
+        }
+    }
+}
+
+impl From<&AnyOtherFullStateEventContent> for SmallStateType {
+    fn from(content: &AnyOtherFullStateEventContent) -> Self {
+        match content {
+            AnyOtherFullStateEventContent::RoomServerAcl(_) => SmallStateType::ServerAcl,
+            AnyOtherFullStateEventContent::RoomCreate(_) => SmallStateType::CreateRoom,
+            AnyOtherFullStateEventContent::_Custom { .. } => SmallStateType::HiddenEvent,
+            // All other room state events are configuration changes
+            _ => SmallStateType::ConfigureRoom,
+        }
+    }
+}
+
+impl From<&TimelineItemContent> for SmallStateType {
+    fn from(content: &TimelineItemContent) -> Self {
+        use matrix_sdk_ui::timeline::TimelineItemContent;
+        match content {
+            TimelineItemContent::MembershipChange(change) => {
+                change.change()
+                    .map(SmallStateType::from)
+                    .unwrap_or_default()
+            }
+            TimelineItemContent::ProfileChange(change) => {
+                match (change.avatar_url_change(), change.displayname_change()) {
+                    (Some(_), _) => SmallStateType::ChangedAvatar,
+                    (None, Some(_)) => SmallStateType::ChangedName,
+                    _ => SmallStateType::NoChange,
+                }
+            }
+            TimelineItemContent::OtherState(other_state) => {
+                SmallStateType::from(other_state.content())
+            }
+            TimelineItemContent::MsgLike(MsgLikeContent { kind, .. }) => {
+                match kind {
+                    MsgLikeKind::Poll(_) => SmallStateType::NoChange,
+                    MsgLikeKind::Redacted => SmallStateType::MessageRemoved,
+                    MsgLikeKind::UnableToDecrypt(_) => SmallStateType::UnableToDecrypt,
+                    _ => SmallStateType::NoChange,
+                }
+            }
+            _ => SmallStateType::NoChange,
+        }
+    }
+}
+
+/// Condensed version of a `EventTimelineItem`, used for generating summaries.
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct UserEvent {
+    /// The transition type
+    pub transition: SmallStateType,
+    /// The index of the event in the timeline
+    pub index: usize,
+    /// The sender of the event
+    pub sender: Option<OwnedUserId>,
+    /// The display name of the sender
+    pub display_name: String,
+    /// The state key of the event
+    pub state_key: Option<String>,
+    /// The ID of the event
+    pub event_id: Option<OwnedEventId>,
+}
+
+impl SmallStateGroup {
+    /// Computes and caches the summary text and avatar user IDs for this group.
+    ///
+    /// This should be called whenever the group's user_events_map is modified.
+    pub fn update_cached_data(&mut self) {
+        // Cache the summary text
+        self.cached_summary = Some(generate_summary(&self.user_events_map, SUMMARY_LENGTH));
+
+        // Cache the avatar user IDs
+        self.cached_avatar_user_ids = Some(extract_avatar_user_ids(&self.user_events_map, MAX_VISIBLE_AVATARS_IN_READ_RECEIPT));
+    }
+}
+
+/// Combines neighboring transitions into compound actions, e.g. [Joined, Left] -> [JoinedAndLeft]
+fn merge_adjacent_transitions(transitions: &[SmallStateType]) -> Vec<SmallStateType> {
+    let mut res = Vec::new();
+    let mut i = 0;
+    while i < transitions.len() {
+        let t = transitions[i];
+        if i + 1 < transitions.len() {
+            let t2 = transitions[i + 1];
+            match (t, t2) {
+                (SmallStateType::Joined, SmallStateType::Left) => {
+                    res.push(SmallStateType::JoinedAndLeft);
+                    i += 2;
+                    continue;
+                }
+                (SmallStateType::Left, SmallStateType::Joined) => {
+                    res.push(SmallStateType::LeftAndJoined);
+                    i += 2;
+                    continue;
+                }
+                _ => {}
+            }
+        }
+        res.push(t);
+        i += 1;
+    }
+    res
+}
+
+/// Groups consecutive identical transitions with their count (e.g. [JoinedAndLeft, JoinedAndLeft] -> (JoinedAndLeft, 2))
+fn group_repeated_transitions(transitions: &[SmallStateType]) -> Vec<(SmallStateType, usize)> {
+    let mut res = Vec::new();
+    for &t in transitions {
+        if let Some((last, count)) = res.last_mut() {
+            if *last == t {
+                *count += 1;
+                continue;
+            }
+        }
+        res.push((t, 1));
+    }
+    res
+}
+
+/// Creates human-readable text for a transition type with user count and repetition count
+fn format_transition_text(
+    transition: SmallStateType,
+    user_count: usize,
+    repeat_count: usize,
+) -> String {
+    let is_plural = user_count > 1;
+    match transition {
+        SmallStateType::CreateRoom => "created and configured the room".to_string(),
+        SmallStateType::ConfigureRoom => "".to_string(),
+        SmallStateType::Joined => {
+            if repeat_count > 1 {
+                if is_plural {
+                    format!("joined (×{})", repeat_count)
+                } else {
+                    format!("joined the room (×{})", repeat_count)
+                }
+            } else {
+                if is_plural {
+                    "joined".to_string()
+                } else {
+                    "joined the room".to_string()
+                }
+            }
+        }
+        SmallStateType::Left => {
+            if repeat_count > 1 {
+                if is_plural {
+                    format!("left (×{})", repeat_count)
+                } else {
+                    format!("left the room (×{})", repeat_count)
+                }
+            } else {
+                if is_plural {
+                    "left".to_string()
+                } else {
+                    "left the room".to_string()
+                }
+            }
+        }
+        SmallStateType::JoinedAndLeft => {
+            if repeat_count > 1 {
+                format!("joined and left (×{})", repeat_count)
+            } else {
+                "joined and left".to_string()
+            }
+        }
+        SmallStateType::LeftAndJoined => {
+            if repeat_count > 1 {
+                format!("left and rejoined (×{})", repeat_count)
+            } else {
+                "left and rejoined".to_string()
+            }
+        }
+        SmallStateType::ChangedName => {
+            if repeat_count > 1 {
+                format!("changed their name (×{})", repeat_count)
+            } else {
+                "changed their name".to_string()
+            }
+        }
+        SmallStateType::ChangedAvatar => {
+            if repeat_count > 1 {
+                format!("changed their profile picture (×{})", repeat_count)
+            } else {
+                "changed their profile picture".to_string()
+            }
+        }
+        SmallStateType::Invited => {
+            if repeat_count > 1 {
+                format!("was invited (×{})", repeat_count)
+            } else {
+                "was invited".to_string()
+            }
+        }
+        SmallStateType::Banned => {
+            if repeat_count > 1 {
+                format!("was banned (×{})", repeat_count)
+            } else {
+                "was banned".to_string()
+            }
+        }
+        SmallStateType::Unbanned => {
+            if repeat_count > 1 {
+                format!("was unbanned (×{})", repeat_count)
+            } else {
+                "was unbanned".to_string()
+            }
+        }
+        SmallStateType::InvitationRejected => {
+            if repeat_count > 1 {
+                format!("rejected invite (×{})", repeat_count)
+            } else {
+                "rejected invite".to_string()
+            }
+        }
+        SmallStateType::InvitationRevoked => {
+            if repeat_count > 1 {
+                format!("invite withdrawn (×{})", repeat_count)
+            } else {
+                "invite withdrawn".to_string()
+            }
+        }
+        SmallStateType::Kicked => {
+            if repeat_count > 1 {
+                format!("was kicked (×{})", repeat_count)
+            } else {
+                "was kicked".to_string()
+            }
+        }
+        SmallStateType::ServerAcl => {
+            if repeat_count > 1 {
+                format!("updated server ACLs (×{})", repeat_count)
+            } else {
+                "updated server ACLs".to_string()
+            }
+        }
+        SmallStateType::ChangedPins => {
+            if repeat_count > 1 {
+                format!("changed pinned messages (×{})", repeat_count)
+            } else {
+                "changed pinned messages".to_string()
+            }
+        }
+        SmallStateType::MessageRemoved => {
+            if repeat_count > 1 {
+                format!("removed a message (×{})", repeat_count)
+            } else {
+                "removed a message".to_string()
+            }
+        }
+        SmallStateType::HiddenEvent => {
+            if repeat_count > 1 {
+                format!("did a hidden event (×{})", repeat_count)
+            } else {
+                "did a hidden event".to_string()
+            }
+        }
+        SmallStateType::NoChange => {
+            if repeat_count > 1 {
+                format!("made no changes (×{})", repeat_count)
+            } else {
+                "made no changes".to_string()
+            }
+        }
+        SmallStateType::UnableToDecrypt => {
+            if repeat_count > 1 {
+                format!("decryption failed (×{})", repeat_count)
+            } else {
+                "decryption failed".to_string()
+            }
+        }
+        _ => "".to_string()
+    }
+}
+
+/// Produce an English-readable name list, with "and N others"
+fn format_user_list(user_names: &[String], max_display_count: usize) -> String {
+    match user_names.len() {
+        0 => "".into(),
+        1 => user_names[0].clone(),
+        2 => format!("{} and {}", user_names[0], user_names[1]),
+        3 => format!("{}, {}, and {}", user_names[0], user_names[1], user_names[2]),
+        n if n <= max_display_count => {
+            let all_but_last = &user_names[..n-1];
+            let last = &user_names[n-1];
+            format!("{}, and {}", all_but_last.join(", "), last)
+        },
+        n => format!(
+            "{}, and {} others",
+            user_names[..max_display_count].join(", "),
+            n - max_display_count
+        ),
+    }
+}
+
+/// Convert an event timeline item to a user event
+fn convert_event_timeline_item_to_user_event(
+    event_item: &EventTimelineItem,
+    index: usize,
+) -> UserEvent {
+    use matrix_sdk_ui::timeline::TimelineItemContent;
+    let state_key = match event_item.content() {
+        TimelineItemContent::MembershipChange(change) => {
+            Some(change.user_id().to_string())
+        }
+        TimelineItemContent::OtherState(other) => Some(other.state_key().to_string()),
+        _ => None,
+    };
+    let transition_type: SmallStateType = event_item.content().into();
+
+    UserEvent {
+        index,
+        display_name: event_item.sender().to_string(),
+        transition: transition_type,
+        sender: Some(event_item.sender().into()),
+        state_key,
+        event_id: event_item.event_id().map(|e|e.to_owned()),
+    }
+}
+
+/// Gets the effective user ID for a user event, preferring state_key over sender.
+/// This handles cases where the state_key represents the actual user being affected.
+fn get_effective_user_id(user_event: &UserEvent) -> Option<OwnedUserId> {
+    match user_event.state_key.as_ref().map(UserId::parse) {
+        Some(Ok(user_id)) => Some(user_id),
+        _ => user_event.sender.clone(),
+    }
+}
+
+/// Checks if a timeline item represents a small state change (membership change, profile change, poll, redacted, or unable to decrypt).
+///
+/// # Arguments
+/// * `timeline_item` - The timeline item to check
+///
+/// # Returns
+/// * `bool` - Whether this is a small state event
+fn is_small_state(timeline_item: Option<&Arc<TimelineItem>>) -> bool {
+    timeline_item
+        .and_then(|timeline_item| match timeline_item.kind() {
+            TimelineItemKind::Event(event_tl_item) => Some(event_tl_item),
+            _ => None,
+        })
+        .map(|e| {
+            matches!(e.content(), TimelineItemContent::MembershipChange(_) | TimelineItemContent::ProfileChange(_) |
+                TimelineItemContent::OtherState(_) | TimelineItemContent::MsgLike(MsgLikeContent { kind: MsgLikeKind::Poll(_) |
+                MsgLikeKind::Redacted | MsgLikeKind::UnableToDecrypt(_), .. }))
+        })
+        .unwrap_or(false)
+}
+
+/// Extracts small state events from timeline items and converts them to UserEvents.
+///
+/// # Arguments
+/// * `timeline_items` - An iterator over timeline items to process
+///
+/// # Returns
+/// * `Vec<UserEvent>` - A vector of converted UserEvent objects from small state timeline items
+pub fn extract_small_state_events<I>(timeline_items: I) -> Vec<UserEvent>
+where
+    I: IntoIterator<Item = std::sync::Arc<matrix_sdk_ui::timeline::TimelineItem>>,
+    I::IntoIter: ExactSizeIterator,
+{
+    timeline_items
+        .into_iter()
+        .enumerate()
+        .filter_map(|(index, item)| {
+            if is_small_state(Some(&item)) {
+                if let matrix_sdk_ui::timeline::TimelineItemKind::Event(event_tl_item) = item.kind() {
+                    Some(convert_event_timeline_item_to_user_event(event_tl_item, index))
+                } else {
+                    None
+                }
+            } else {
+                if let matrix_sdk_ui::timeline::TimelineItemKind::Virtual(_) = item.kind() {
+                    Some(UserEvent {
+                            index,
+                            display_name: "".to_string(),
+                            transition: SmallStateType::VirtualTimelineItem,
+                            sender: None,
+                            state_key: None,
+                            event_id: None,
+                        })
+                } else {
+                    None
+                }
+            }
+        })
+        .collect()
+}
+
+/// Generates a summary string from user events.
+///
+/// # Arguments
+/// * `user_events` - A HashMap mapping user IDs to their list of UserEvents
+/// * `summary_length` - Maximum number of user names to display before coalescing
+/// # Returns
+/// * `String` - The generated summary string
+fn generate_summary(
+    user_events: &HashMap<OwnedUserId, Vec<UserEvent>>,
+    summary_length: usize,
+) -> String {
+    // Aggregate by transition sequence
+    let mut aggregates: Vec<(Vec<SmallStateType>, Vec<String>)> = Vec::new();
+
+    for (user_id, events) in user_events {
+        // Create sorted indices instead of cloning the entire events vector
+        let mut sorted_indices: Vec<usize> = (0..events.len()).collect();
+        sorted_indices.sort_by_key(|&i| events[i].index);
+        let mut transitions: Vec<_> = sorted_indices.iter().map(|&i| events[i].transition).collect();
+
+        // Filter out Joined transitions for room creators
+        if transitions.contains(&SmallStateType::CreateRoom) {
+            transitions.retain(|&t| t != SmallStateType::Joined);
+        }
+
+        let canonical = merge_adjacent_transitions(&transitions);
+        let name = if let Some(&first_idx) = sorted_indices.first() {
+            &events[first_idx].display_name
+        } else {
+            &user_id.to_string()
+        };
+
+        if let Some((_, names)) = aggregates.iter_mut().find(|(seq, _)| seq == &canonical) {
+            names.push(name.to_string());
+        } else {
+            aggregates.push((canonical, vec![name.to_string()]));
+        }
+    }
+
+    // Build text
+    let mut summary_parts = Vec::new();
+    for (canonical, names) in aggregates {
+        let coalesced = group_repeated_transitions(&canonical);
+
+        let descs: Vec<String> = coalesced
+            .into_iter()
+            .map(|(transition, repeat_count)| {
+                format_transition_text(transition, names.len(), repeat_count)
+            })
+            .collect();
+        let name_list = format_user_list(&names, summary_length);
+        let transition_text = descs.join(", ");
+        summary_parts.push(format!("{} {}", name_list, transition_text));
+    }
+
+    summary_parts.join(", ")
+}
+
+/// Extracts and sorts user IDs from user events map for avatar display.
+///
+/// This is the expensive computation part that should be cached.
+fn extract_avatar_user_ids(
+    user_events_map: &HashMap<OwnedUserId, Vec<UserEvent>>,
+    max_avatars: usize,
+) -> Vec<OwnedUserId> {
+    // Extract user IDs from the map, sorted by their first event index for consistency
+    let mut user_data: Vec<(OwnedUserId, usize)> = user_events_map
+        .iter()
+        .map(|(user_id, events)| {
+            let first_index = events.iter().map(|e| e.index).min().unwrap_or(0);
+            (user_id.clone(), first_index)
+        })
+        .collect();
+
+    // Sort by first event index to maintain chronological order
+    user_data.sort_by_key(|(_, first_index)| *first_index);
+
+    // Extract just the user IDs and limit to max_avatars
+    user_data
+        .into_iter()
+        .take(max_avatars)
+        .map(|(user_id, _)| user_id)
+        .collect()
+}
+
+/// Populates the avatar row with user avatars from pre-computed user IDs.
+pub fn populate_avatar_row_from_user_ids(
+    cx: &mut Cx,
+    avatar_row: &WidgetRef,
+    room_id: &matrix_sdk::ruma::RoomId,
+    user_ids: &[OwnedUserId],
+) {
+    // Reuse read receipts logic to populate the avatar row.
+    let receipts_map: IndexMap<OwnedUserId, matrix_sdk::ruma::events::receipt::Receipt> = user_ids
+        .iter()
+        .map(|user_id| {
+            let receipt = matrix_sdk::ruma::events::receipt::Receipt::new(
+                matrix_sdk::ruma::MilliSecondsSinceUnixEpoch::now()
+            );
+            (user_id.clone(), receipt)
+        })
+        .collect();
+
+    avatar_row.avatar_row(ids!(user_event_avatar_row)).set_avatar_row(cx, room_id, None, &receipts_map);
+}
diff --git a/src/home/mod.rs b/src/home/mod.rs
index 40f912893..ec0c68cee 100644
--- a/src/home/mod.rs
+++ b/src/home/mod.rs
@@ -3,6 +3,7 @@ use makepad_widgets::Cx;
 pub mod add_room;
 pub mod edited_indicator;
 pub mod editing_pane;
+pub mod event_group;
 pub mod home_screen;
 pub mod invite_screen;
 pub mod light_themed_dock;
@@ -39,6 +40,7 @@ pub fn live_design(cx: &mut Cx) {
     rooms_list::live_design(cx);
     edited_indicator::live_design(cx);
     editing_pane::live_design(cx);
+    event_group::live_design(cx);
     new_message_context_menu::live_design(cx);
     invite_screen::live_design(cx);
     tombstone_footer::live_design(cx);
diff --git a/src/home/room_screen.rs b/src/home/room_screen.rs
index 5a0799c2e..7b7387aeb 100644
--- a/src/home/room_screen.rs
+++ b/src/home/room_screen.rs
@@ -25,7 +25,7 @@ use matrix_sdk_ui::timeline::{
 use ruma::{OwnedUserId, events::{AnySyncMessageLikeEvent, AnySyncTimelineEvent, SyncMessageLikeEvent}};
 
 use crate::{
-    app::AppStateAction, avatar_cache, event_preview::{plaintext_body_of_timeline_item, text_preview_of_encrypted_message, text_preview_of_member_profile_change, text_preview_of_other_message_like, text_preview_of_other_state, text_preview_of_room_membership_change, text_preview_of_timeline_item}, home::{edited_indicator::EditedIndicatorWidgetRefExt, link_preview::{LinkPreviewCache, LinkPreviewRef, LinkPreviewWidgetRefExt}, loading_pane::{LoadingPaneState, LoadingPaneWidgetExt}, room_image_viewer::{get_image_name_and_filesize, populate_matrix_image_modal}, rooms_list::RoomsListRef, tombstone_footer::SuccessorRoomDetails}, media_cache::{MediaCache, MediaCacheEntry}, profile::{
+    app::AppStateAction, avatar_cache, event_preview::{plaintext_body_of_timeline_item, text_preview_of_encrypted_message, text_preview_of_member_profile_change, text_preview_of_other_message_like, text_preview_of_other_state, text_preview_of_room_membership_change, text_preview_of_timeline_item}, home::{edited_indicator::EditedIndicatorWidgetRefExt, event_group::extract_small_state_events, link_preview::{LinkPreviewCache, LinkPreviewRef, LinkPreviewWidgetRefExt}, loading_pane::{LoadingPaneState, LoadingPaneWidgetExt}, room_image_viewer::{get_image_name_and_filesize, populate_matrix_image_modal}, rooms_list::RoomsListRef, tombstone_footer::SuccessorRoomDetails}, media_cache::{MediaCache, MediaCacheEntry}, profile::{
         user_profile::{ShowUserProfileAction, UserProfile, UserProfileAndRoomId, UserProfilePaneInfo, UserProfileSlidingPaneRef, UserProfileSlidingPaneWidgetExt},
         user_profile_cache,
     },
@@ -77,8 +77,10 @@ live_design! {
     use crate::room::reply_preview::RepliedToMessage;
     use crate::room::typing_notice::*;
     use crate::home::room_read_receipt::*;
+    use crate::home::event_group::SmallStateGroupHeader;
     use crate::rooms_list::*;
     use crate::shared::restore_status_view::*;
+    use crate::shared::view_list::ViewList;
     use crate::home::link_preview::LinkPreview;
     use link::tsp_link::TspSignIndicator;
 
@@ -491,6 +493,23 @@ live_design! {
             ImageMessage = <ImageMessage> {}
             CondensedImageMessage = <CondensedImageMessage> {}
             SmallStateEvent = <SmallStateEvent> {}
+            SmallStateGroupHeader = <SmallStateGroupHeader> {
+                body: <View> {
+                    width: Fill,
+                    height: Fit
+                    flow: Down
+                    // As populate_small_state uses PortalList as parameter, create a portal list but do not draw it.
+                    dummy_portal_list = <PortalList> {
+                        height: 0, width: Fill
+                        SmallStateEvent = <SmallStateEvent> {}
+                        CondensedMessage = <CondensedMessage> {}
+                        Message = <Message> {}
+                    }
+                    view_list = <ViewList> {
+                        width: Fill
+                    }
+                }
+            }
             Empty = <Empty> {}
             DateDivider = <DateDivider> {}
             ReadMarker = <ReadMarker> {}
@@ -1016,13 +1035,44 @@ impl Widget for RoomScreen {
             while let Some(item_id) = list.next_visible_item(cx) {
                 let item = {
                     let tl_idx = item_id;
+                    if let Some(group_range) = tl_state.small_state_group_manager.check_group_range(item_id) {
+                        if group_range.start == item_id {
+                            // This is the first item of a group - render FoldHeader
+                            if let Some(group) = tl_state.small_state_group_manager.get_group_at_item_id(item_id) {
+                                let item = populate_small_state_group_header(
+                                    cx,
+                                    list,
+                                    item_id,
+                                    room_id,
+                                    &group_range,
+                                    group,
+                                    tl_items,
+                                    &mut tl_state.content_drawn_since_last_update,
+                                    &mut tl_state.profile_drawn_since_last_update,
+                                    &mut tl_state.media_cache,
+                                    &mut tl_state.link_preview_cache,
+                                    &tl_state.user_power,
+                                    &self.pinned_events,
+                                    room_screen_widget_uid,
+                                );
+                                item.draw_all(cx, scope);
+                            } else {
+                                let item = list.item(cx, item_id, id!(Empty));
+                                item.draw_all(cx, scope);
+                            }
+                            continue;
+                        } else if group_range.contains(&item_id) {
+                            let item = list.item(cx, item_id, id!(Empty));
+                            item.draw_all(cx, scope);
+                            continue;
+                        }
+                    }
                     let Some(timeline_item) = tl_items.get(tl_idx) else {
                         // This shouldn't happen (unless the timeline gets corrupted or some other weird error),
                         // but we can always safely fill the item with an empty widget that takes up no space.
                         list.item(cx, item_id, id!(Empty));
                         continue;
                     };
-
                     // Determine whether this item's content and profile have been drawn since the last update.
                     // Pass this state to each of the `populate_*` functions so they can attempt to re-use
                     // an item in the timeline's portallist that was previously populated, if one exists.
@@ -1194,6 +1244,8 @@ impl RoomScreen {
 
                     tl.items = initial_items;
                     done_loading = true;
+                    let small_state_events = extract_small_state_events(tl.items.iter().cloned());
+                    tl.small_state_group_manager.compute_group_state(small_state_events);
                 }
                 TimelineUpdate::NewItems { new_items, changed_indices, is_append, clear_cache } => {
                     if new_items.is_empty() {
@@ -1305,6 +1357,8 @@ impl RoomScreen {
                         // log!("process_timeline_updates(): changed_indices: {changed_indices:?}, items len: {}\ncontent drawn: {:#?}\nprofile drawn: {:#?}", items.len(), tl.content_drawn_since_last_update, tl.profile_drawn_since_last_update);
                     }
                     tl.items = new_items;
+                    let small_state_events = extract_small_state_events(tl.items.iter().cloned());
+                    tl.small_state_group_manager.compute_group_state(small_state_events);
                     done_loading = true;
                 }
                 TimelineUpdate::NewUnreadMessagesCount(unread_messages_count) => {
@@ -2128,6 +2182,7 @@ impl RoomScreen {
                 scrolled_past_read_marker: false,
                 latest_own_user_receipt: None,
                 tombstone_info,
+                small_state_group_manager: crate::home::event_group::SmallStateGroupManager::default(),
             };
             (tl_state, true)
         };
@@ -2687,6 +2742,9 @@ struct TimelineUiState {
     /// If `Some`, this room has been tombstoned and the details of its successor room
     /// are contained within. If `None`, the room has not been tombstoned.
     tombstone_info: Option<SuccessorRoomDetails>,
+
+    /// Manager for small state event groups that can be collapsed/expanded.
+    small_state_group_manager: crate::home::event_group::SmallStateGroupManager,
 }
 
 #[derive(Default, Debug)]
@@ -4081,7 +4139,6 @@ impl SmallStateEventContent for RoomMembershipChange {
             cx,
             matches!(self.change(), Some(MembershipChange::Knocked)),
         );
-
         new_drawn_status.content_drawn = true;
         (item, new_drawn_status)
     }
@@ -4151,6 +4208,99 @@ fn populate_small_state_event(
     )
 }
 
+/// Creates and populates a SmallStateGroupHeader (FoldHeader) for a group of small state events.
+///
+/// This follows the portal_list_auto_grouping pattern:
+/// - The header shows a summary and fold button
+/// - The body contains a ViewList with all grouped items (excluding the first one)
+///
+/// # Arguments
+/// * `group_range` - The range of timeline indices covered by this group
+/// * `group` - The SmallStateGroup metadata containing cached summary and user IDs
+/// * `tl_items` - The full list of timeline items
+fn populate_small_state_group_header(
+    cx: &mut Cx2d,
+    list: &mut PortalList,
+    item_id: usize,
+    room_id: &OwnedRoomId,
+    group_range: &std::ops::Range<usize>,
+    group: &crate::home::event_group::SmallStateGroup,
+    tl_items: &imbl::Vector<Arc<TimelineItem>>,
+    content_drawn_since_last_update: &mut RangeSet<usize>,
+    profile_drawn_since_last_update: &mut RangeSet<usize>,
+    media_cache: &mut MediaCache,
+    link_preview_cache: &mut LinkPreviewCache,
+    user_power_levels: &UserPowerLevels,
+    pinned_events: &[OwnedEventId],
+    room_screen_widget_uid: WidgetUid,
+) -> WidgetRef {
+    use crate::shared::view_list::ViewListWidgetRefExt;
+
+    // Get the FoldHeader item from portal list
+    let (fold_item, _existed) = list.item_with_existed(cx, item_id, id!(SmallStateGroupHeader));
+    // Set the header summary text
+    if let Some(summary) = &group.cached_summary {
+        fold_item.label(ids!(summary_text)).set_text(cx, summary);
+    }
+
+    // Set the avatars in the header
+    if let Some(user_ids) = &group.cached_avatar_user_ids {
+        crate::home::event_group::populate_avatar_row_from_user_ids(
+            cx,
+            &fold_item,
+            room_id,
+            user_ids,
+        );
+    }
+
+    // Create SmallStateEvent views for each item in the group range (skip first, which is the header)
+    let mut widgetref_list = vec![];
+    let dummy_portal_list = fold_item.portal_list(ids!(dummy_portal_list));
+    if let Some(mut list_ref) = dummy_portal_list.borrow_mut() {
+        let list = list_ref.deref_mut();
+        for tl_idx in (group_range.start)..group_range.end {
+            if let Some(timeline_item) = tl_items.get(tl_idx) {
+                let item_drawn_status = ItemDrawnStatus {
+                    content_drawn: content_drawn_since_last_update.contains(&tl_idx),
+                    profile_drawn: profile_drawn_since_last_update.contains(&tl_idx),
+                };
+                if let TimelineItemKind::Event(event_tl_item) = timeline_item.kind() {
+                    // Create a new SmallStateEvent view from the template
+                    let (item, item_drawn_status) = match event_tl_item.content() {
+                        TimelineItemContent::MsgLike(msg_like_content) => match &msg_like_content.kind {
+                            MsgLikeKind::Redacted => {
+                                let prev_event = tl_idx.checked_sub(1).and_then(|i| tl_items.get(i));
+                                populate_message_view(cx, list, tl_idx, room_id, event_tl_item, msg_like_content, prev_event, media_cache, link_preview_cache, user_power_levels, pinned_events, item_drawn_status, room_screen_widget_uid)
+                            }
+                            MsgLikeKind::Poll(poll_state) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, poll_state, item_drawn_status),
+                            MsgLikeKind::UnableToDecrypt(utd) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, utd, item_drawn_status),
+                            MsgLikeKind::Other(other) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, other, item_drawn_status),
+                            _ => (list.item_with_existed(cx, tl_idx, id!(Empty)).0, item_drawn_status)
+                        },
+                        TimelineItemContent::MembershipChange(membership_change) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, membership_change, item_drawn_status),
+                        TimelineItemContent::ProfileChange(profile_change) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, profile_change, item_drawn_status),
+                        TimelineItemContent::OtherState(other_state) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, other_state, item_drawn_status),
+                        _=> (list.item_with_existed(cx, tl_idx, id!(Empty)).0, item_drawn_status)
+                    };
+                    if item_drawn_status.content_drawn {
+                        content_drawn_since_last_update.insert(tl_idx..tl_idx + 1);
+                    }
+                    if item_drawn_status.profile_drawn {
+                        profile_drawn_since_last_update.insert(tl_idx..tl_idx + 1);
+                    }
+                    widgetref_list.push(item);
+                }
+            }
+        }
+    }
+    // Get the ViewList reference from the fold header body
+    let mut view_widget = fold_item.view_list(ids!(view_list));
+    // Set the views into the ViewList
+    view_widget.set_widgetref_list(widgetref_list);
+
+    fold_item
+}
+
 
 /// Returns the display name of the sender of the given `event_tl_item`, if available.
 fn get_profile_display_name(event_tl_item: &EventTimelineItem) -> Option<String> {
diff --git a/src/shared/fold_button_with_text.rs b/src/shared/fold_button_with_text.rs
new file mode 100644
index 000000000..2c7a50fbf
--- /dev/null
+++ b/src/shared/fold_button_with_text.rs
@@ -0,0 +1,321 @@
+use makepad_widgets::*;
+use makepad_widgets::widget::WidgetActionData;
+use makepad_widgets::fold_button::FoldButtonAction;
+live_design! {
+    use link::widgets::*;
+    use link::theme::*;
+    use link::shaders::*;
+
+    pub FoldButtonWithTextBase = {{FoldButtonWithText}} {}
+
+    pub FoldButtonWithText = <FoldButtonWithTextBase> {
+        width: Fit, height: Fit,
+        padding: {left: 5., right: 10., top: 5., bottom: 5.}
+
+        open_text: "Show More"
+        close_text: "Show Less"
+        triangle_size: 5.0
+
+        draw_bg: {
+            instance active: 0.0
+            instance hover: 0.0
+            instance triangle_size: 2.5
+
+            uniform fade: 1.0
+            uniform rect_color: vec4(-1.0, -1.0, -1.0, 0.0)
+            uniform rect_color_hover: (THEME_COLOR_OUTSET_2_HOVER)
+            uniform border_color: (THEME_COLOR_BEVEL)
+            uniform border_radius: 2.0
+            uniform color: #666
+            uniform color_active: #000
+            uniform color_hover: #000
+            fn pixel(self) -> vec4 {
+                let sdf = Sdf2d::viewport(self.pos * self.rect_size);
+                sdf.clear(vec4(0.));
+
+                // Draw background with rounded corners
+                sdf.box(
+                    1.,
+                    1.,
+                    self.rect_size.x - 2.0,
+                    self.rect_size.y - 2.0,
+                    self.border_radius
+                )
+
+                sdf.fill_keep(
+                    mix(self.rect_color, self.rect_color_hover, self.hover)
+                )
+
+                sdf.stroke(
+                    self.border_color,
+                    1.0
+                )
+
+                // Draw triangle - positioned from left edge with y-axis center alignment
+                let sz = self.triangle_size;
+                let triangle_x = 5.0 + sz;  // Position from left with padding
+                //let c = vec2(triangle_x, self.rect_size.y * 0.5);
+                let c = vec2(triangle_x, self.rect_size.y * 0.5);
+                // Rotate triangle based on active state
+                sdf.rotate(self.active * 0.5 * PI + 0.5 * PI, c.x, c.y);
+                sdf.move_to(c.x - sz, c.y + sz);
+                sdf.line_to(c.x, c.y - sz);
+                sdf.line_to(c.x + sz, c.y + sz);
+                sdf.close_path();
+                sdf.fill(
+                    mix(
+                        mix(self.color, self.color_hover, self.hover),
+                            mix(self.color_active, self.color_hover, self.hover),
+                                self.active
+                    )
+                );
+                return sdf.result * self.fade;
+            }
+        }
+
+        draw_text: {
+            instance hover: 0.0
+            instance down: 0.0
+
+            color: #666
+            uniform color_hover: #000
+
+            text_style: <THEME_FONT_REGULAR> {
+                font_size: 11.0
+            }
+
+            fn get_color(self) -> vec4 {
+                return mix(
+                    self.color,
+                    self.color_hover,
+                    self.hover
+                )
+            }
+        }
+
+        animator: {
+            hover = {
+                default: off
+                off = {
+                    from: {all: Forward {duration: 0.2}}
+                    redraw: true
+                    apply: {
+                        draw_bg: {hover: 0.0}
+                        draw_text: {hover: 0.0}
+                    }
+                }
+
+                on = {
+                    from: {all: Snap}
+                    redraw: true
+                    apply: {
+                        draw_bg: {hover: 1.0}
+                        draw_text: {hover: 1.0}
+                    }
+                }
+            }
+
+            active = {
+                default: on
+                off = {
+                    from: {all: Forward {duration: 0.2}}
+                    ease: ExpDecay {d1: 0.96, d2: 0.97}
+                    redraw: true
+                    apply: {
+                        active: 0.0,
+
+                        draw_bg: {active: [{time: 0.0, value: 1.0}, {time: 1.0, value: 0.0}]}
+                    }
+                }
+                on = {
+                    from: {all: Forward {duration: 0.2}}
+                    ease: ExpDecay {d1: 0.98, d2: 0.95}
+                    redraw: true
+                    apply: {
+                        active: 1.0
+                        draw_bg: {active: [{time: 0.0, value: 0.0}, {time: 1.0, value: 1.0}]}
+                    }
+                }
+            }
+        }
+    }
+}
+
+#[derive(Live, Widget)]
+pub struct FoldButtonWithText {
+    #[animator] animator: Animator,
+
+    #[redraw] #[live] draw_bg: DrawQuad,
+    #[redraw] #[live] draw_text: DrawText,
+
+    #[walk] walk: Walk,
+    #[layout] layout: Layout,
+
+    #[live] active: f64,
+    #[live] triangle_size: f64,
+    #[live] open_text: ArcStringMut,
+    #[live] close_text: ArcStringMut,
+
+    #[action_data] #[rust] action_data: WidgetActionData,
+}
+impl LiveHook for FoldButtonWithText {
+    fn after_new_from_doc(&mut self, cx: &mut Cx) {
+        self.apply_over(cx, live!(
+            draw_bg: {
+                triangle_size: (self.triangle_size)
+            }
+        ));
+    }
+}
+impl Widget for FoldButtonWithText {
+    fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
+        let uid = self.widget_uid();
+        let res = self.animator_handle_event(cx, event);
+
+        if res.is_animating() {
+            if self.animator.is_track_animating(cx, ids!(active)) {
+                let mut value = [0.0];
+                self.draw_bg.get_instance(cx, ids!(active), &mut value);
+                cx.widget_action(uid, &scope.path, FoldButtonAction::Animating(value[0] as f64))
+            }
+            if res.must_redraw() {
+                self.draw_bg.redraw(cx);
+            }
+        }
+
+        match event.hits(cx, self.draw_bg.area()) {
+            Hit::FingerDown(_fe) => {
+                if self.animator_in_state(cx, ids!(active.on)) {
+                    self.animator_play(cx, ids!(active.off));
+                    cx.widget_action(uid, &scope.path, FoldButtonAction::Closing)
+                } else {
+                    self.animator_play(cx, ids!(active.on));
+                    cx.widget_action(uid, &scope.path, FoldButtonAction::Opening)
+                }
+                self.animator_play(cx, ids!(hover.on));
+            },
+            Hit::FingerHoverIn(_) => {
+                cx.set_cursor(MouseCursor::Hand);
+                self.animator_play(cx, ids!(hover.on));
+            }
+            Hit::FingerHoverOut(_) => {
+                self.animator_play(cx, ids!(hover.off));
+            }
+            Hit::FingerUp(fe) => {
+                if fe.is_over {
+                    if fe.device.has_hovers() {
+                        self.animator_play(cx, ids!(hover.on));
+                    } else {
+                        self.animator_play(cx, ids!(hover.off));
+                    }
+                } else {
+                    self.animator_play(cx, ids!(hover.off));
+                }
+            }
+            _ => ()
+        }
+    }
+
+    fn draw_walk(&mut self, cx: &mut Cx2d, _scope: &mut Scope, walk: Walk) -> DrawStep {
+        self.draw_bg.begin(cx, walk, self.layout);
+        let label_walk = walk.with_margin_left(self.triangle_size * 2.0 + 10.0);
+        let text = if self.active > 0.5 {
+            self.close_text.as_ref()
+        } else {
+            self.open_text.as_ref()
+        };
+        self.draw_text.draw_walk(cx, label_walk, Align::default(), text);
+        self.draw_bg.end(cx);
+        DrawStep::done()
+    }
+}
+
+impl FoldButtonWithText {
+    pub fn texts(&self) -> (String, String) {
+        (self.open_text.as_ref().to_string(), self.close_text.as_ref().to_string())
+    }
+    pub fn set_texts(&mut self, cx: &mut Cx, open_text: &str, close_text: &str) {
+        self.open_text.as_mut_empty().push_str(open_text);
+        self.close_text.as_mut_empty().push_str(close_text);
+        self.redraw(cx);
+    }
+}
+impl FoldButtonWithText {
+    pub fn set_is_open(&mut self, cx: &mut Cx, is_open: bool, animate: Animate) {
+        self.animator_toggle(cx, is_open, animate, ids!(active.on), ids!(active.off))
+    }
+
+    pub fn opening(&self, actions: &Actions) -> bool {
+        if let Some(item) = actions.find_widget_action(self.widget_uid()) {
+            if let FoldButtonAction::Opening = item.cast() {
+                return true
+            }
+        }
+        false
+    }
+
+    pub fn closing(&self, actions: &Actions) -> bool {
+        if let Some(item) = actions.find_widget_action(self.widget_uid()) {
+            if let FoldButtonAction::Closing = item.cast() {
+                return true
+            }
+        }
+        false
+    }
+
+    pub fn animating(&self, actions: &Actions) -> Option<f64> {
+        if let Some(item) = actions.find_widget_action(self.widget_uid()) {
+            if let FoldButtonAction::Animating(v) = item.cast() {
+                return Some(v)
+            }
+        }
+        None
+    }
+}
+
+impl FoldButtonWithTextRef {
+    pub fn opening(&self, actions: &Actions) -> bool {
+        if let Some(item) = actions.find_widget_action(self.widget_uid()) {
+            if let FoldButtonAction::Opening = item.cast() {
+                return true
+            }
+        }
+        false
+    }
+
+    pub fn closing(&self, actions: &Actions) -> bool {
+        if let Some(item) = actions.find_widget_action(self.widget_uid()) {
+            if let FoldButtonAction::Closing = item.cast() {
+                return true
+            }
+        }
+        false
+    }
+
+    pub fn animating(&self, actions: &Actions) -> Option<f64> {
+        if let Some(item) = actions.find_widget_action(self.widget_uid()) {
+            if let FoldButtonAction::Animating(v) = item.cast() {
+                return Some(v)
+            }
+        }
+        None
+    }
+
+    pub fn open_float(&self) -> f64 {
+        if let Some(inner) = self.borrow() {
+            inner.active
+        } else {
+            1.0
+        }
+    }
+    pub fn texts(&self) -> Option<(String, String)> {
+        self.borrow().map(|inner| inner.texts())
+    }
+
+    pub fn set_texts(&self, cx: &mut Cx, open_text: &str, close_text: &str) {
+        if let Some(mut inner) = self.borrow_mut() {
+            inner.set_texts(cx, open_text, close_text);
+        }
+    }
+}
+
diff --git a/src/shared/mod.rs b/src/shared/mod.rs
index 0a8395674..332334daa 100644
--- a/src/shared/mod.rs
+++ b/src/shared/mod.rs
@@ -19,6 +19,8 @@ pub mod unread_badge;
 pub mod verification_badge;
 pub mod restore_status_view;
 pub mod image_viewer;
+pub mod view_list;
+pub mod fold_button_with_text;
 
 
 pub fn live_design(cx: &mut Cx) {
@@ -42,4 +44,6 @@ pub fn live_design(cx: &mut Cx) {
     restore_status_view::live_design(cx);
     confirmation_modal::live_design(cx);
     image_viewer::live_design(cx);
+    view_list::live_design(cx);
+    fold_button_with_text::live_design(cx);
 }
diff --git a/src/shared/view_list.rs b/src/shared/view_list.rs
new file mode 100644
index 000000000..90b8ae22e
--- /dev/null
+++ b/src/shared/view_list.rs
@@ -0,0 +1,55 @@
+use makepad_widgets::*;
+live_design! {
+    use link::theme::*;
+    use link::shaders::*;
+    use link::widgets::*;
+    pub ViewList = {{ViewList}} {
+        width: 275
+        height: Fit
+        flow: Down
+    }
+
+}
+
+#[derive(Live, LiveHook, Widget)]
+pub struct ViewList {
+    #[redraw]
+    #[live]
+    draw_bg: DrawQuad,
+    #[layout]
+    layout: Layout,
+    #[walk]
+    walk: Walk,
+    #[rust]
+    widgetref_list: Vec<WidgetRef>,
+}
+impl ViewList {
+    pub fn set_widgetref_list(&mut self, widgetref_list: Vec<WidgetRef>) {
+        self.widgetref_list = widgetref_list;
+    }
+}
+impl ViewListRef {
+    pub fn set_widgetref_list(&mut self, widgetref_list: Vec<WidgetRef>) {
+        if let Some(mut inner) = self.borrow_mut() {
+            inner.set_widgetref_list(widgetref_list);
+        } else {
+            log!("ViewList is not initialized.");
+        }
+    }
+}
+
+impl Widget for ViewList {
+    fn draw_walk(&mut self, cx: &mut Cx2d, scope: &mut Scope, walk: Walk) -> DrawStep {
+        cx.begin_turtle(walk, self.layout);
+        for widget_ref in self.widgetref_list.iter_mut() {
+            widget_ref.draw_all(cx, scope);
+        }
+        cx.end_turtle();
+        DrawStep::done()
+    }
+    fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
+        for widget_ref in self.widgetref_list.iter_mut() {
+            widget_ref.handle_event(cx, event, scope);
+        }
+    }
+}

From 53e036d964ccd9ec68753eb8dbdd8581489e14c9 Mon Sep 17 00:00:00 2001
From: alanpoon <brightshadowx@gmail.com>
Date: Thu, 22 Jan 2026 12:55:06 +0800
Subject: [PATCH 2/3] FoldHeader for portalList

---
 Cargo.toml              |  2 +-
 src/home/event_group.rs | 13 +-----
 src/home/room_screen.rs | 99 ++++++++++++++++++-----------------------
 src/shared/mod.rs       |  2 -
 src/shared/view_list.rs | 55 -----------------------
 5 files changed, 45 insertions(+), 126 deletions(-)
 delete mode 100644 src/shared/view_list.rs

diff --git a/Cargo.toml b/Cargo.toml
index 33a601224..01561d4ac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ version = "0.0.1-pre-alpha-4"
 metadata.makepad-auto-version = "zqpv-Yj-K7WNVK2I8h5Okhho46Q="
 
 [dependencies]
-makepad-widgets = { git = "https://github.com/kevinaboos/makepad", branch = "serde_optional", features = ["serde"] }
+makepad-widgets = { git = "https://github.com/alanpoon/makepad", branch = "serde_fold_header", features = ["serde"] }
 # makepad-widgets = { git = "https://github.com/makepad/makepad", branch = "dev", features = ["serde"] }
 
 ## Including this crate automatically configures all `robius-*` crates to work with Makepad.
diff --git a/src/home/event_group.rs b/src/home/event_group.rs
index 0d9c3df93..a6d798240 100644
--- a/src/home/event_group.rs
+++ b/src/home/event_group.rs
@@ -80,7 +80,7 @@ live_design! {
 ///
 /// The group is identified by a range of timeline item indices, and contains a mapping
 /// of user events within that range for generating summaries.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Default, Clone, PartialEq, Eq)]
 pub struct SmallStateGroup {
     pub room_creator: Option<OwnedUserId>,
     /// Mapping of user IDs to their events within this group.
@@ -102,17 +102,6 @@ pub struct SmallStateGroup {
     pub cached_avatar_user_ids: Option<Vec<OwnedUserId>>,
 }
 
-impl Default for SmallStateGroup {
-    fn default() -> Self {
-        Self {
-            room_creator: None,
-            user_events_map: HashMap::new(),
-            cached_summary: None,
-            cached_avatar_user_ids: None,
-        }
-    }
-}
-
 /// Combined state for managing small state groups
 #[derive(Default, Debug)]
 pub struct SmallStateGroupManager {
diff --git a/src/home/room_screen.rs b/src/home/room_screen.rs
index 7b7387aeb..38885d3a0 100644
--- a/src/home/room_screen.rs
+++ b/src/home/room_screen.rs
@@ -80,7 +80,6 @@ live_design! {
     use crate::home::event_group::SmallStateGroupHeader;
     use crate::rooms_list::*;
     use crate::shared::restore_status_view::*;
-    use crate::shared::view_list::ViewList;
     use crate::home::link_preview::LinkPreview;
     use link::tsp_link::TspSignIndicator;
 
@@ -498,16 +497,12 @@ live_design! {
                     width: Fill,
                     height: Fit
                     flow: Down
-                    // As populate_small_state uses PortalList as parameter, create a portal list but do not draw it.
-                    dummy_portal_list = <PortalList> {
-                        height: 0, width: Fill
+                    <PortalList> {
+                        height: Fit, width: Fill
                         SmallStateEvent = <SmallStateEvent> {}
                         CondensedMessage = <CondensedMessage> {}
                         Message = <Message> {}
                     }
-                    view_list = <ViewList> {
-                        width: Fill
-                    }
                 }
             }
             Empty = <Empty> {}
@@ -1039,8 +1034,10 @@ impl Widget for RoomScreen {
                         if group_range.start == item_id {
                             // This is the first item of a group - render FoldHeader
                             if let Some(group) = tl_state.small_state_group_manager.get_group_at_item_id(item_id) {
-                                let item = populate_small_state_group_header(
+                                populate_small_state_group_header(
                                     cx,
+                                    scope,
+                                    walk,
                                     list,
                                     item_id,
                                     room_id,
@@ -1055,7 +1052,6 @@ impl Widget for RoomScreen {
                                     &self.pinned_events,
                                     room_screen_widget_uid,
                                 );
-                                item.draw_all(cx, scope);
                             } else {
                                 let item = list.item(cx, item_id, id!(Empty));
                                 item.draw_all(cx, scope);
@@ -4220,6 +4216,8 @@ fn populate_small_state_event(
 /// * `tl_items` - The full list of timeline items
 fn populate_small_state_group_header(
     cx: &mut Cx2d,
+    scope: &mut Scope,
+    walk: Walk,
     list: &mut PortalList,
     item_id: usize,
     room_id: &OwnedRoomId,
@@ -4233,10 +4231,7 @@ fn populate_small_state_group_header(
     user_power_levels: &UserPowerLevels,
     pinned_events: &[OwnedEventId],
     room_screen_widget_uid: WidgetUid,
-) -> WidgetRef {
-    use crate::shared::view_list::ViewListWidgetRefExt;
-
-    // Get the FoldHeader item from portal list
+) {
     let (fold_item, _existed) = list.item_with_existed(cx, item_id, id!(SmallStateGroupHeader));
     // Set the header summary text
     if let Some(summary) = &group.cached_summary {
@@ -4252,56 +4247,48 @@ fn populate_small_state_group_header(
             user_ids,
         );
     }
-
-    // Create SmallStateEvent views for each item in the group range (skip first, which is the header)
-    let mut widgetref_list = vec![];
-    let dummy_portal_list = fold_item.portal_list(ids!(dummy_portal_list));
-    if let Some(mut list_ref) = dummy_portal_list.borrow_mut() {
-        let list = list_ref.deref_mut();
-        for tl_idx in (group_range.start)..group_range.end {
-            if let Some(timeline_item) = tl_items.get(tl_idx) {
-                let item_drawn_status = ItemDrawnStatus {
-                    content_drawn: content_drawn_since_last_update.contains(&tl_idx),
-                    profile_drawn: profile_drawn_since_last_update.contains(&tl_idx),
-                };
-                if let TimelineItemKind::Event(event_tl_item) = timeline_item.kind() {
-                    // Create a new SmallStateEvent view from the template
-                    let (item, item_drawn_status) = match event_tl_item.content() {
-                        TimelineItemContent::MsgLike(msg_like_content) => match &msg_like_content.kind {
-                            MsgLikeKind::Redacted => {
-                                let prev_event = tl_idx.checked_sub(1).and_then(|i| tl_items.get(i));
-                                populate_message_view(cx, list, tl_idx, room_id, event_tl_item, msg_like_content, prev_event, media_cache, link_preview_cache, user_power_levels, pinned_events, item_drawn_status, room_screen_widget_uid)
-                            }
-                            MsgLikeKind::Poll(poll_state) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, poll_state, item_drawn_status),
-                            MsgLikeKind::UnableToDecrypt(utd) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, utd, item_drawn_status),
-                            MsgLikeKind::Other(other) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, other, item_drawn_status),
-                            _ => (list.item_with_existed(cx, tl_idx, id!(Empty)).0, item_drawn_status)
-                        },
-                        TimelineItemContent::MembershipChange(membership_change) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, membership_change, item_drawn_status),
-                        TimelineItemContent::ProfileChange(profile_change) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, profile_change, item_drawn_status),
-                        TimelineItemContent::OtherState(other_state) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, other_state, item_drawn_status),
-                        _=> (list.item_with_existed(cx, tl_idx, id!(Empty)).0, item_drawn_status)
+    let mut walk = walk;
+    walk.height = Size::fit();
+    while let Some(item) = fold_item.draw_walk(cx, scope, walk).step() {
+        if let Some(mut list_ref) = item.as_portal_list().borrow_mut() {
+            let list = list_ref.deref_mut();
+            for tl_idx in (group_range.start)..group_range.end {
+                if let Some(timeline_item) = tl_items.get(tl_idx) {
+                    let item_drawn_status = ItemDrawnStatus {
+                        content_drawn: content_drawn_since_last_update.contains(&tl_idx),
+                        profile_drawn: profile_drawn_since_last_update.contains(&tl_idx),
                     };
-                    if item_drawn_status.content_drawn {
-                        content_drawn_since_last_update.insert(tl_idx..tl_idx + 1);
-                    }
-                    if item_drawn_status.profile_drawn {
-                        profile_drawn_since_last_update.insert(tl_idx..tl_idx + 1);
+                    if let TimelineItemKind::Event(event_tl_item) = timeline_item.kind() {
+                        // Create a new SmallStateEvent view from the template
+                        let (item, item_drawn_status) = match event_tl_item.content() {
+                            TimelineItemContent::MsgLike(msg_like_content) => match &msg_like_content.kind {
+                                MsgLikeKind::Redacted => {
+                                    let prev_event = tl_idx.checked_sub(1).and_then(|i| tl_items.get(i));
+                                    populate_message_view(cx, list, tl_idx, room_id, event_tl_item, msg_like_content, prev_event, media_cache, link_preview_cache, user_power_levels, pinned_events, item_drawn_status, room_screen_widget_uid)
+                                }
+                                MsgLikeKind::Poll(poll_state) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, poll_state, item_drawn_status),
+                                MsgLikeKind::UnableToDecrypt(utd) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, utd, item_drawn_status),
+                                MsgLikeKind::Other(other) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, other, item_drawn_status),
+                                _ => (list.item_with_existed(cx, tl_idx, id!(Empty)).0, item_drawn_status)
+                            },
+                            TimelineItemContent::MembershipChange(membership_change) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, membership_change, item_drawn_status),
+                            TimelineItemContent::ProfileChange(profile_change) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, profile_change, item_drawn_status),
+                            TimelineItemContent::OtherState(other_state) => populate_small_state_event(cx, list, tl_idx, room_id, event_tl_item, other_state, item_drawn_status),
+                            _=> (list.item_with_existed(cx, tl_idx, id!(Empty)).0, item_drawn_status)
+                        };
+                        if item_drawn_status.content_drawn {
+                            content_drawn_since_last_update.insert(tl_idx..tl_idx + 1);
+                        }
+                        if item_drawn_status.profile_drawn {
+                            profile_drawn_since_last_update.insert(tl_idx..tl_idx + 1);
+                        }
+                        item.draw_all(cx, scope);
                     }
-                    widgetref_list.push(item);
                 }
             }
         }
     }
-    // Get the ViewList reference from the fold header body
-    let mut view_widget = fold_item.view_list(ids!(view_list));
-    // Set the views into the ViewList
-    view_widget.set_widgetref_list(widgetref_list);
-
-    fold_item
 }
-
-
 /// Returns the display name of the sender of the given `event_tl_item`, if available.
 fn get_profile_display_name(event_tl_item: &EventTimelineItem) -> Option<String> {
     if let TimelineDetails::Ready(profile) = event_tl_item.sender_profile() {
diff --git a/src/shared/mod.rs b/src/shared/mod.rs
index 332334daa..de13a6800 100644
--- a/src/shared/mod.rs
+++ b/src/shared/mod.rs
@@ -19,7 +19,6 @@ pub mod unread_badge;
 pub mod verification_badge;
 pub mod restore_status_view;
 pub mod image_viewer;
-pub mod view_list;
 pub mod fold_button_with_text;
 
 
@@ -44,6 +43,5 @@ pub fn live_design(cx: &mut Cx) {
     restore_status_view::live_design(cx);
     confirmation_modal::live_design(cx);
     image_viewer::live_design(cx);
-    view_list::live_design(cx);
     fold_button_with_text::live_design(cx);
 }
diff --git a/src/shared/view_list.rs b/src/shared/view_list.rs
deleted file mode 100644
index 90b8ae22e..000000000
--- a/src/shared/view_list.rs
+++ /dev/null
@@ -1,55 +0,0 @@
-use makepad_widgets::*;
-live_design! {
-    use link::theme::*;
-    use link::shaders::*;
-    use link::widgets::*;
-    pub ViewList = {{ViewList}} {
-        width: 275
-        height: Fit
-        flow: Down
-    }
-
-}
-
-#[derive(Live, LiveHook, Widget)]
-pub struct ViewList {
-    #[redraw]
-    #[live]
-    draw_bg: DrawQuad,
-    #[layout]
-    layout: Layout,
-    #[walk]
-    walk: Walk,
-    #[rust]
-    widgetref_list: Vec<WidgetRef>,
-}
-impl ViewList {
-    pub fn set_widgetref_list(&mut self, widgetref_list: Vec<WidgetRef>) {
-        self.widgetref_list = widgetref_list;
-    }
-}
-impl ViewListRef {
-    pub fn set_widgetref_list(&mut self, widgetref_list: Vec<WidgetRef>) {
-        if let Some(mut inner) = self.borrow_mut() {
-            inner.set_widgetref_list(widgetref_list);
-        } else {
-            log!("ViewList is not initialized.");
-        }
-    }
-}
-
-impl Widget for ViewList {
-    fn draw_walk(&mut self, cx: &mut Cx2d, scope: &mut Scope, walk: Walk) -> DrawStep {
-        cx.begin_turtle(walk, self.layout);
-        for widget_ref in self.widgetref_list.iter_mut() {
-            widget_ref.draw_all(cx, scope);
-        }
-        cx.end_turtle();
-        DrawStep::done()
-    }
-    fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
-        for widget_ref in self.widgetref_list.iter_mut() {
-            widget_ref.handle_event(cx, event, scope);
-        }
-    }
-}

From a9041239d3c128ffee632458689ec38601d7b095 Mon Sep 17 00:00:00 2001
From: alanpoon <brightshadowx@gmail.com>
Date: Thu, 22 Jan 2026 13:08:52 +0800
Subject: [PATCH 3/3] Added BottomSpace

---
 src/home/room_screen.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/home/room_screen.rs b/src/home/room_screen.rs
index 38885d3a0..a29274955 100644
--- a/src/home/room_screen.rs
+++ b/src/home/room_screen.rs
@@ -508,6 +508,11 @@ live_design! {
             Empty = <Empty> {}
             DateDivider = <DateDivider> {}
             ReadMarker = <ReadMarker> {}
+            // BottomSpace adds height at the end of the timeline to prevent infinite drawing of 0 height items.
+            BottomSpace = <View> {
+                height: 100.0
+                width: Fill
+            }
         }
 
         // A jump to bottom button (with an unread message badge) that is shown
@@ -1063,6 +1068,11 @@ impl Widget for RoomScreen {
                             continue;
                         }
                     }
+                    if item_id > tl_items.len() {
+                        let item = list.item(cx, item_id, id!(BottomSpace));
+                        item.draw_all(cx, scope);
+                        continue;
+                    }
                     let Some(timeline_item) = tl_items.get(tl_idx) else {
                         // This shouldn't happen (unless the timeline gets corrupted or some other weird error),
                         // but we can always safely fill the item with an empty widget that takes up no space.