Implement basic foundations for SpaceLobbyScreen

src/home/navigation_tab_bar.rs

@@ -31,10 +31,10 @@
 use makepad_widgets::*;
 use crate::{
     avatar_cache::{self, AvatarCacheEntry}, login::login_screen::LoginAction, logout::logout_confirm_modal::LogoutAction, profile::{
-        user_profile::{AvatarState, UserProfile},
+        user_profile::UserProfile,
         user_profile_cache::{self, UserProfileUpdate},
     }, shared::{
-        avatar::AvatarWidgetExt,
+        avatar::{AvatarState, AvatarWidgetExt},
         callout_tooltip::{CalloutTooltipOptions, TooltipAction, TooltipPosition},
         styles::*,
         verification_badge::VerificationBadgeWidgetExt,

src/home/room_screen.rs

@@ -26,12 +26,12 @@ use ruma::{OwnedUserId, events::{AnySyncMessageLikeEvent, AnySyncTimelineEvent,
 
 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::{
-        user_profile::{AvatarState, ShowUserProfileAction, UserProfile, UserProfileAndRoomId, UserProfilePaneInfo, UserProfileSlidingPaneRef, UserProfileSlidingPaneWidgetExt},
+        user_profile::{ShowUserProfileAction, UserProfile, UserProfileAndRoomId, UserProfilePaneInfo, UserProfileSlidingPaneRef, UserProfileSlidingPaneWidgetExt},
         user_profile_cache,
     },
     room::{BasicRoomDetails, room_input_bar::RoomInputBarState, typing_notice::TypingNoticeWidgetExt},
     shared::{
-        avatar::AvatarWidgetRefExt, callout_tooltip::{CalloutTooltipOptions, TooltipAction, TooltipPosition}, confirmation_modal::ConfirmationModalContent, html_or_plaintext::{HtmlOrPlaintextRef, HtmlOrPlaintextWidgetRefExt, RobrixHtmlLinkAction}, image_viewer::{ImageViewerAction, ImageViewerMetaData, LoadState}, jump_to_bottom_button::{JumpToBottomButtonWidgetExt, UnreadMessageCount}, popup_list::{PopupItem, PopupKind, enqueue_popup_notification}, restore_status_view::RestoreStatusViewWidgetExt, styles::*, text_or_image::{TextOrImageAction, TextOrImageRef, TextOrImageWidgetRefExt}, timestamp::TimestampWidgetRefExt
+        avatar::{AvatarState, AvatarWidgetRefExt}, callout_tooltip::{CalloutTooltipOptions, TooltipAction, TooltipPosition}, confirmation_modal::ConfirmationModalContent, html_or_plaintext::{HtmlOrPlaintextRef, HtmlOrPlaintextWidgetRefExt, RobrixHtmlLinkAction}, image_viewer::{ImageViewerAction, ImageViewerMetaData, LoadState}, jump_to_bottom_button::{JumpToBottomButtonWidgetExt, UnreadMessageCount}, popup_list::{PopupItem, PopupKind, enqueue_popup_notification}, restore_status_view::RestoreStatusViewWidgetExt, styles::*, text_or_image::{TextOrImageAction, TextOrImageRef, TextOrImageWidgetRefExt}, timestamp::TimestampWidgetRefExt
     },
     sliding_sync::{BackwardsPaginateUntilEventRequest, MatrixRequest, PaginationDirection, TimelineEndpoints, TimelineRequestSender, UserPowerLevels, get_client, submit_async_request, take_timeline_endpoints}, utils::{self, ImageFormat, MEDIA_THUMBNAIL_FORMAT, RoomNameId, unix_time_millis_to_datetime}
 };

src/home/rooms_list.rs

@@ -358,7 +358,7 @@ pub enum InviteState {
 
 /// The value in the RoomsList's `space_map` that contains info about a space.
 #[derive(Default)]
-struct SpaceMapValue { 
+struct SpaceMapValue {
     /// Whether this space is fully paginated, meaning that our client has obtained
     /// the full list of direct children within this space.
     ///
@@ -1034,6 +1034,8 @@ impl RoomsList {
                     kind: PopupKind::Error,
                 });
             }
+            // DetailedChildren is handled by SpaceLobbyScreen, not RoomsList.
+            SpaceRoomListAction::DetailedChildren { .. } => { }
         }
     }
 
@@ -1395,6 +1397,22 @@ impl RoomsListRef {
     pub fn get_selected_space_id(&self) -> Option<OwnedRoomId> {
         self.borrow()?.selected_space.as_ref().map(|ss| ss.room_id().clone())
     }
+
+    /// Returns a clone of the space request sender channel, if available.
+    ///
+    /// This allows other widgets to submit space-related requests directly
+    /// to the background space service.
+    pub fn get_space_request_sender(&self) -> Option<UnboundedSender<SpaceRequest>> {
+        self.borrow()?.space_request_sender.clone()
+    }
+
+    /// Returns the parent chain of the given space, if known.
+    pub fn get_space_parent_chain(&self, space_id: &OwnedRoomId) -> Option<ParentChain> {
+        self.borrow()?
+            .space_map
+            .get(space_id)
+            .map(|smv| smv.parent_chain.clone())
+    }
 }
 
 pub struct RoomsListScopeProps {