Speedup quick switcher

src/Cache.cpp

@@ -99,7 +99,6 @@ using Receipts       = std::map<std::string, std::map<std::string, uint64_t>>;
 
 Q_DECLARE_METATYPE(RoomMember)
 Q_DECLARE_METATYPE(mtx::responses::Timeline)
-Q_DECLARE_METATYPE(RoomSearchResult)
 Q_DECLARE_METATYPE(RoomInfo)
 Q_DECLARE_METATYPE(mtx::responses::QueryKeys)
 
@@ -2451,6 +2450,39 @@ Cache::roomInfo(bool withInvites)
     return result;
 }
 
+std::vector<RoomNameAlias>
+Cache::roomNamesAndAliases()
+{
+    auto txn = ro_txn(env_);
+
+    std::vector<RoomNameAlias> result;
+    result.reserve(roomsDb_.size(txn));
+
+    std::string_view room_id;
+    std::string_view room_data;
+    auto roomsCursor = lmdb::cursor::open(txn, roomsDb_);
+    while (roomsCursor.get(room_id, room_data, MDB_NEXT)) {
+        try {
+            std::string room_id_str = std::string(room_id);
+            RoomInfo info           = nlohmann::json::parse(std::move(room_data)).get<RoomInfo>();
+
+            auto aliases = getStateEvent<mtx::events::state::CanonicalAlias>(txn, room_id_str);
+            std::string alias;
+            if (aliases) {
+                alias = aliases->content.alias;
+            }
+
+            result.push_back(RoomNameAlias{.id    = std::move(room_id_str),
+                                           .name  = std::move(info.name),
+                                           .alias = std::move(alias)});
+        } catch (std::exception &e) {
+            nhlog::db()->warn("Failed to add room {} to result: {}", room_id, e.what());
+        }
+    }
+
+    return result;
+}
+
 std::string
 Cache::getLastEventId(lmdb::txn &txn, const std::string &room_id)
 {
@@ -5136,7 +5168,6 @@ void
 init(const QString &user_id)
 {
     qRegisterMetaType<RoomMember>();
-    qRegisterMetaType<RoomSearchResult>();
     qRegisterMetaType<RoomInfo>();
     qRegisterMetaType<QMap<QString, RoomInfo>>();
     qRegisterMetaType<std::map<QString, RoomInfo>>();

src/CacheStructs.h

@@ -103,6 +103,12 @@ to_json(nlohmann::json &j, const RoomInfo &info);
 void
 from_json(const nlohmann::json &j, RoomInfo &info);
 
+//! A plain struct with roomid, name and alias used for filling the room completer.
+struct RoomNameAlias
+{
+    std::string id, name, alias;
+};
+
 //! Basic information per member.
 struct MemberInfo
 {

src/Cache_p.h

@@ -167,6 +167,9 @@ public:
     RoomInfo singleRoomInfo(const std::string &room_id);
     std::vector<std::string> roomsWithStateUpdates(const mtx::responses::Sync &res);
     std::map<QString, RoomInfo> getRoomInfo(const std::vector<std::string> &rooms);
+
+    std::vector<RoomNameAlias> roomNamesAndAliases();
+
     void updateLastMessageTimestamp(const std::string &room_id, uint64_t ts);
 
     //! Calculates which the read status of a room.

src/RoomsModel.cpp

@@ -12,34 +12,16 @@
 #include "Cache_p.h"
 #include "CompletionModelRoles.h"
 #include "UserSettingsPage.h"
+#include "Utils.h"
 
 RoomsModel::RoomsModel(bool showOnlyRoomWithAliases, QObject *parent)
   : QAbstractListModel(parent)
   , showOnlyRoomWithAliases_(showOnlyRoomWithAliases)
 {
-    std::vector<std::string> rooms_ = cache::joinedRooms();
-    roomInfos                       = cache::getRoomInfo(rooms_);
-    if (!showOnlyRoomWithAliases_) {
-        roomids.reserve(rooms_.size());
-        roomAliases.reserve(rooms_.size());
-    }
+    rooms = cache::client()->roomNamesAndAliases();
 
-    for (const auto &r : rooms_) {
-        auto roomAliasesList =
-          cache::client()->getStateEvent<mtx::events::state::CanonicalAlias>(r);
-
-        if (showOnlyRoomWithAliases_) {
-            if (roomAliasesList && !roomAliasesList->content.alias.empty()) {
-                roomids.push_back(QString::fromStdString(r));
-                roomAliases.push_back(QString::fromStdString(roomAliasesList->content.alias));
-            }
-        } else {
-            roomids.push_back(QString::fromStdString(r));
-            roomAliases.push_back(roomAliasesList
-                                    ? QString::fromStdString(roomAliasesList->content.alias)
-                                    : QLatin1String(""));
-        }
-    }
+    if (showOnlyRoomWithAliases_)
+        utils::erase_if(rooms, [](auto &r) { return r.alias.empty(); });
 }
 
 QHash<int, QByteArray>
@@ -60,29 +42,28 @@ RoomsModel::data(const QModelIndex &index, int role) const
     if (hasIndex(index.row(), index.column(), index.parent())) {
         switch (role) {
         case CompletionModel::CompletionRole: {
+            auto alias = QString::fromStdString(rooms[index.row()].alias);
             if (UserSettings::instance()->markdown()) {
-                QString percentEncoding = QUrl::toPercentEncoding(roomAliases[index.row()]);
+                QString percentEncoding = QUrl::toPercentEncoding(alias);
                 return QStringLiteral("[%1](https://matrix.to/#/%2)")
-                  .arg(QString(roomAliases[index.row()])
-                         .replace("[", "\\[")
-                         .replace("]", "\\]")
-                         .toHtmlEscaped(),
+                  .arg(alias.replace("[", "\\[").replace("]", "\\]").toHtmlEscaped(),
                        percentEncoding);
             } else {
-                return roomAliases[index.row()];
+                return alias;
             }
         }
         case CompletionModel::SearchRole:
         case Qt::DisplayRole:
         case Roles::RoomAlias:
-            return roomAliases[index.row()].toHtmlEscaped();
+            return QString::fromStdString(rooms[index.row()].alias).toHtmlEscaped();
         case CompletionModel::SearchRole2:
         case Roles::RoomName:
-            return QString::fromStdString(roomInfos.at(roomids[index.row()]).name).toHtmlEscaped();
+            return QString::fromStdString(rooms[index.row()].name);
         case Roles::AvatarUrl:
-            return QString::fromStdString(roomInfos.at(roomids[index.row()]).avatar_url);
+            return QString::fromStdString(
+              cache::client()->singleRoomInfo(rooms[index.row()].id).avatar_url);
         case Roles::RoomID:
-            return roomids[index.row()].toHtmlEscaped();
+            return QString::fromStdString(rooms[index.row()].id).toHtmlEscaped();
         }
     }
     return {};

src/RoomsModel.h

@@ -27,13 +27,11 @@ public:
     int rowCount(const QModelIndex &parent = QModelIndex()) const override
     {
         (void)parent;
-        return (int)roomids.size();
+        return (int)rooms.size();
     }
     QVariant data(const QModelIndex &index, int role) const override;
 
 private:
-    std::vector<QString> roomids;
-    std::vector<QString> roomAliases;
-    std::map<QString, RoomInfo> roomInfos;
+    std::vector<RoomNameAlias> rooms;
     bool showOnlyRoomWithAliases_;
 };