Line to indicate first unread message (#1147)

* First draft of unread line feature.

* Minor visual fix.

* Removed unnecessary ternary operator.

* Extended unread line functionality to work on minimised window or focusing another window.

* Fix for unread line not showing when last read message is hidden.

* Minor performance improvement. Fix for misbehaving event2order DB at application start.

* Fix for possible performance issues when user has joined a large number of rooms.

* Fix for breaking macos and clazy builds.

* Changed on windows focus function to refresh unread line if room is unread.

* Unread line is removed when user sends a message.

* Linting.

* Fixed unread line to work in standalone room windows.

* Switch isRoomUnread for index 0.

* Merged try/catch blocks.

* Fix for crash on opening a room invite.

* Call fullyReadEventId function when used instead of storing it and passing it through.

* Function that was meant to sync the unread line was relying on an async function, oops.

* Linting again.

* More linting...

* Minor changes.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/Cache.h b/src/Cache.h

index 1545f7e8..7ea659ec 100644
--- a/src/Cache.h
+++ b/src/Cache.h
@@ -152,6 +152,8 @@ std::optional<uint64_t>
 getEventIndex(const std::string &room_id, std::string_view event_id);
 std::optional<std::pair<uint64_t, std::string>>
 lastInvisibleEventAfter(const std::string &room_id, std::string_view event_id);
+std::optional<std::pair<uint64_t, std::string>>
+lastVisibleEvent(const std::string &room_id, std::string_view event_id);
 
 RoomInfo
 singleRoomInfo(const std::string &room_id);
@@ -160,6 +162,8 @@ getRoomInfo(const std::vector<std::string> &rooms);
 
 //! Calculates which the read status of a room.
 //! Whether all the events in the timeline have been read.
+std::string
+getFullyReadEventId(const std::string &room_id);
 bool
 calculateRoomReadStatus(const std::string &room_id);
 void