From 990a3a97c7578c30223ff4f348b9241be75f5bf9 Mon Sep 17 00:00:00 2001
From: Konstantinos Sideris <sideris.konstantin@gmail.com>
Date: Sat, 1 Sep 2018 13:35:10 +0300
Subject: [PATCH] Merge matrix-structs into the client lib

---
 CMakeLists.txt                 | 19 +++++++++++--
 README.md                      |  1 -
 deps/CMakeLists.txt            | 29 ++++++++------------
 deps/cmake/MatrixStructs.cmake | 24 ----------------
 deps/cmake/SpdLog.cmake        |  1 +
 src/Cache.cpp                  | 10 +++----
 src/Cache.h                    | 50 +++++++++++++++++-----------------
 src/ChatPage.h                 |  5 ++--
 src/Olm.cpp                    |  6 ++--
 src/RoomInfoListItem.cpp       |  2 --
 src/TextInputWidget.cpp        |  2 --
 src/Utils.cpp                  | 38 +++++++++++++-------------
 src/Utils.h                    | 19 +++++++------
 src/timeline/TimelineView.cpp  | 46 ++++++++++++++++---------------
 14 files changed, 121 insertions(+), 131 deletions(-)
 delete mode 100644 deps/cmake/MatrixStructs.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f2c987d..cb641cd5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,9 @@ option(ASAN "Compile with address sanitizers" OFF)
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
+add_definitions(-DBOOST_MPL_LIMIT_LIST_SIZE=30)
+add_definitions(-DBOOST_MPL_CFG_NO_PREPROCESSED_HEADERS)
+
 include(GNUInstallDirs)
 
 # Include Qt basic functions
@@ -230,9 +233,20 @@ set(SRC_FILES
 # ExternalProject dependencies
 set(EXTERNAL_PROJECT_DEPS "")
 
+set(Boost_USE_STATIC_LIBS OFF)
+set(Boost_USE_STATIC_RUNTIME OFF)
+set(Boost_USE_MULTITHREADED ON)
+find_package(Boost 1.66 REQUIRED
+             COMPONENTS atomic
+                        chrono
+                        date_time
+                        iostreams
+                        random
+                        regex
+                        system
+                        thread)
 find_package(ZLIB REQUIRED)
 find_package(OpenSSL REQUIRED)
-find_package(MatrixStructs 0.1.0 REQUIRED)
 find_package(MatrixClient 0.1.0 REQUIRED)
 find_package(Olm 2 REQUIRED)
 find_package(spdlog 1.0.0 CONFIG REQUIRED)
@@ -259,6 +273,7 @@ include_directories(SYSTEM ${TWEENY_INCLUDE_DIR})
 
 include_directories(${CMAKE_SOURCE_DIR}/src)
 include_directories(${CMAKE_CURRENT_BINARY_DIR}/config)
+include_directories(${Boost_INCLUDE_DIRS})
 
 qt5_wrap_cpp(MOC_HEADERS
     # Dialogs
@@ -342,8 +357,8 @@ include(Translations)
 set(TRANSLATION_DEPS ${LANG_QRC} ${QRC} ${QM_SRC})
 
 set(COMMON_LIBS
-    MatrixStructs::MatrixStructs
     MatrixClient::MatrixClient
+    ${Boost_LIBRARIES}
     Qt5::Widgets
     Qt5::Svg
     Qt5::Concurrent
diff --git a/README.md b/README.md
index c01a2a13..f414092f 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,6 @@ sudo port install nheko
   Freetype, which is essential to properly support emoji.
 - CMake 3.1 or greater.
 - [mtxclient](https://github.com/mujx/mtxclient)
-- [matrix-structs](https://github.com/mujx/matrix-structs)
 - [LMDB](https://symas.com/lightning-memory-mapped-database/)
 - Boost 1.66 or greater.
 - [libolm](https://git.matrix.org/git/olm)
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 1e079d6f..c9fefebb 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -26,8 +26,6 @@ option(USE_BUNDLED_SPDLOG "Use the bundled version of spdlog." ${USE_BUNDLED})
 option(USE_BUNDLED_OLM "Use the bundled version of libolm." ${USE_BUNDLED})
 option(USE_BUNDLED_TWEENY "Use the bundled version of Tweeny." ${USE_BUNDLED})
 option(USE_BUNDLED_LMDBXX "Use the bundled version of lmdbxx." ${USE_BUNDLED})
-option(USE_BUNDLED_MATRIX_STRUCTS "Use the bundled version of matrix-structs."
-       ${USE_BUNDLED})
 option(USE_BUNDLED_MATRIX_CLIENT "Use the bundled version of mtxclient."
        ${USE_BUNDLED})
 
@@ -38,19 +36,12 @@ set(BOOST_URL
 set(BOOST_SHA256
     5721818253e6a0989583192f96782c4a98eb6204965316df9f5ad75819225ca9)
 
-set(
-  MATRIX_STRUCTS_URL
-  https://github.com/mujx/matrix-structs/archive/8de04afea34e95c14d1dde82af390592dfde90dd.tar.gz
-  )
-set(MATRIX_STRUCTS_HASH
-    255a82a9e463261858cd7da18f34fd60d19882ab507d214e47ea47ff78ae68b6)
-
 set(
   MTXCLIENT_URL
-  https://github.com/mujx/mtxclient/archive/10894678e982bc037a0aa4cf650b89a566ccbc52.tar.gz
+  https://github.com/mujx/mtxclient/archive/343cf4b1589b380443dd7f34f381d655ba9cc87c.tar.gz
   )
 set(MTXCLIENT_HASH
-    9bbb4613e6ed7c9886575221e1820c4aeda302ff29703e9040e53a2d0236c8ea)
+    68d4f7be55bb62a59e8698ecb04705e7422b63d5caccede26e2e0153f17ccda9)
 
 set(
   TWEENY_URL
@@ -69,9 +60,17 @@ set(LMDBXX_HASH
 set(OLM_URL https://git.matrix.org/git/olm.git)
 set(OLM_TAG 4065c8e11a33ba41133a086ed3de4da94dcb6bae)
 
-set(SPDLOG_URL https://github.com/gabime/spdlog/archive/v1.0.0.tar.gz)
+set(SPDLOG_URL https://github.com/gabime/spdlog/archive/v1.1.0.tar.gz)
 set(SPDLOG_HASH
-    90d5365121bcd2c41ce94dfe6a460e89507a2dfef6133fe5fad5bb35ac4ef0a1)
+    3dbcbfd8c07e25f5e0d662b194d3a7772ef214358c49ada23c044c4747ce8b19)
+
+set(JSON_HEADER_URL
+    https://github.com/nlohmann/json/releases/download/v3.2.0/json.hpp)
+set(JSON_HEADER_HASH
+    ce6b5610a051ec6795fa11c33854abebb086f0fd67c311f5921c3c07f9531b44)
+
+file(DOWNLOAD ${JSON_HEADER_URL} ${DEPS_INSTALL_DIR}/include/json.hpp
+     EXPECTED_HASH SHA256=${JSON_HEADER_HASH})
 
 if(USE_BUNDLED_BOOST)
   include(Boost)
@@ -85,10 +84,6 @@ if(USE_BUNDLED_OLM)
   include(Olm)
 endif()
 
-if(USE_BUNDLED_MATRIX_STRUCTS)
-  include(MatrixStructs)
-endif()
-
 if(USE_BUNDLED_TWEENY)
   include(Tweeny)
 endif()
diff --git a/deps/cmake/MatrixStructs.cmake b/deps/cmake/MatrixStructs.cmake
deleted file mode 100644
index adc273d5..00000000
--- a/deps/cmake/MatrixStructs.cmake
+++ /dev/null
@@ -1,24 +0,0 @@
-set(WINDOWS_FLAGS "")
-
-if(MSVC)
-    set(WINDOWS_FLAGS "-DCMAKE_GENERATOR_PLATFORM=x64")
-endif()
-
-ExternalProject_Add(
-  MatrixStructs
-
-  URL ${MATRIX_STRUCTS_URL}
-  URL_HASH SHA256=${MATRIX_STRUCTS_HASH}
-
-  BUILD_IN_SOURCE 1
-  SOURCE_DIR ${DEPS_BUILD_DIR}/matrix_structs
-  CONFIGURE_COMMAND ${CMAKE_COMMAND} 
-        -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
-        -DCMAKE_BUILD_TYPE=Release 
-        ${DEPS_BUILD_DIR}/matrix_structs
-        ${WINDOWS_FLAGS}
-  BUILD_COMMAND ${CMAKE_COMMAND} 
-        --build ${DEPS_BUILD_DIR}/matrix_structs 
-        --config Release)
-
-list(APPEND THIRD_PARTY_DEPS MatrixStructs)
diff --git a/deps/cmake/SpdLog.cmake b/deps/cmake/SpdLog.cmake
index f4111ed6..27109b66 100644
--- a/deps/cmake/SpdLog.cmake
+++ b/deps/cmake/SpdLog.cmake
@@ -15,6 +15,7 @@ ExternalProject_Add(
   CONFIGURE_COMMAND ${CMAKE_COMMAND}
         -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
         -DSPDLOG_BUILD_EXAMPLES=0
+        -DSPDLOG_BUILD_BENCH=0
         -DSPDLOG_BUILD_TESTING=0
         ${DEPS_BUILD_DIR}/spdlog
         ${WINDOWS_FLAGS})
diff --git a/src/Cache.cpp b/src/Cache.cpp
index b8b4a2bf..4965167b 100644
--- a/src/Cache.cpp
+++ b/src/Cache.cpp
@@ -24,8 +24,8 @@
 #include <QSettings>
 #include <QStandardPaths>
 
+#include <boost/variant.hpp>
 #include <mtx/responses/common.hpp>
-#include <variant.hpp>
 
 #include "Cache.h"
 #include "Utils.h"
@@ -918,8 +918,8 @@ Cache::saveInvite(lmdb::txn &txn,
         using namespace mtx::events::state;
 
         for (const auto &e : room.invite_state) {
-                if (mpark::holds_alternative<StrippedEvent<Member>>(e)) {
-                        auto msg = mpark::get<StrippedEvent<Member>>(e);
+                if (boost::get<StrippedEvent<Member>>(&e) != nullptr) {
+                        auto msg = boost::get<StrippedEvent<Member>>(e);
 
                         auto display_name = msg.content.display_name.empty()
                                               ? msg.state_key
@@ -930,7 +930,7 @@ Cache::saveInvite(lmdb::txn &txn,
                         lmdb::dbi_put(
                           txn, membersdb, lmdb::val(msg.state_key), lmdb::val(json(tmp).dump()));
                 } else {
-                        mpark::visit(
+                        boost::apply_visitor(
                           [&txn, &statesdb](auto msg) {
                                   bool res = lmdb::dbi_put(txn,
                                                            statesdb,
@@ -1744,7 +1744,7 @@ Cache::saveTimelineMessages(lmdb::txn &txn,
                 if (isStateEvent(e))
                         continue;
 
-                if (mpark::holds_alternative<RedactionEvent<msg::Redaction>>(e))
+                if (boost::get<RedactionEvent<msg::Redaction>>(&e) != nullptr)
                         continue;
 
                 json obj = json::object();
diff --git a/src/Cache.h b/src/Cache.h
index c2f8cfc8..ce531056 100644
--- a/src/Cache.h
+++ b/src/Cache.h
@@ -486,8 +486,8 @@ private:
                 using namespace mtx::events;
                 using namespace mtx::events::state;
 
-                if (mpark::holds_alternative<StateEvent<Member>>(event)) {
-                        const auto e = mpark::get<StateEvent<Member>>(event);
+                if (boost::get<StateEvent<Member>>(&event) != nullptr) {
+                        const auto e = boost::get<StateEvent<Member>>(event);
 
                         switch (e.content.membership) {
                         //
@@ -531,7 +531,7 @@ private:
                         }
 
                         return;
-                } else if (mpark::holds_alternative<StateEvent<Encryption>>(event)) {
+                } else if (boost::get<StateEvent<Encryption>>(&event) != nullptr) {
                         setEncryptedRoom(txn, room_id);
                         return;
                 }
@@ -539,7 +539,7 @@ private:
                 if (!isStateEvent(event))
                         return;
 
-                mpark::visit(
+                boost::apply_visitor(
                   [&txn, &statesdb](auto e) {
                           lmdb::dbi_put(
                             txn, statesdb, lmdb::val(to_string(e.type)), lmdb::val(json(e).dump()));
@@ -553,17 +553,17 @@ private:
                 using namespace mtx::events;
                 using namespace mtx::events::state;
 
-                return mpark::holds_alternative<StateEvent<Aliases>>(e) ||
-                       mpark::holds_alternative<StateEvent<state::Avatar>>(e) ||
-                       mpark::holds_alternative<StateEvent<CanonicalAlias>>(e) ||
-                       mpark::holds_alternative<StateEvent<Create>>(e) ||
-                       mpark::holds_alternative<StateEvent<GuestAccess>>(e) ||
-                       mpark::holds_alternative<StateEvent<HistoryVisibility>>(e) ||
-                       mpark::holds_alternative<StateEvent<JoinRules>>(e) ||
-                       mpark::holds_alternative<StateEvent<Name>>(e) ||
-                       mpark::holds_alternative<StateEvent<Member>>(e) ||
-                       mpark::holds_alternative<StateEvent<PowerLevels>>(e) ||
-                       mpark::holds_alternative<StateEvent<Topic>>(e);
+                return boost::get<StateEvent<Aliases>>(&e) != nullptr ||
+                       boost::get<StateEvent<state::Avatar>>(&e) != nullptr ||
+                       boost::get<StateEvent<CanonicalAlias>>(&e) != nullptr ||
+                       boost::get<StateEvent<Create>>(&e) != nullptr ||
+                       boost::get<StateEvent<GuestAccess>>(&e) != nullptr ||
+                       boost::get<StateEvent<HistoryVisibility>>(&e) != nullptr ||
+                       boost::get<StateEvent<JoinRules>>(&e) != nullptr ||
+                       boost::get<StateEvent<Name>>(&e) != nullptr ||
+                       boost::get<StateEvent<Member>>(&e) != nullptr ||
+                       boost::get<StateEvent<PowerLevels>>(&e) != nullptr ||
+                       boost::get<StateEvent<Topic>>(&e) != nullptr;
         }
 
         template<class T>
@@ -572,11 +572,11 @@ private:
                 using namespace mtx::events;
                 using namespace mtx::events::state;
 
-                return mpark::holds_alternative<StateEvent<state::Avatar>>(e) ||
-                       mpark::holds_alternative<StateEvent<CanonicalAlias>>(e) ||
-                       mpark::holds_alternative<StateEvent<Name>>(e) ||
-                       mpark::holds_alternative<StateEvent<Member>>(e) ||
-                       mpark::holds_alternative<StateEvent<Topic>>(e);
+                return boost::get<StateEvent<state::Avatar>>(&e) != nullptr ||
+                       boost::get<StateEvent<CanonicalAlias>>(&e) != nullptr ||
+                       boost::get<StateEvent<Name>>(&e) != nullptr ||
+                       boost::get<StateEvent<Member>>(&e) != nullptr ||
+                       boost::get<StateEvent<Topic>>(&e) != nullptr;
         }
 
         bool containsStateUpdates(const mtx::events::collections::StrippedEvents &e)
@@ -584,11 +584,11 @@ private:
                 using namespace mtx::events;
                 using namespace mtx::events::state;
 
-                return mpark::holds_alternative<StrippedEvent<state::Avatar>>(e) ||
-                       mpark::holds_alternative<StrippedEvent<CanonicalAlias>>(e) ||
-                       mpark::holds_alternative<StrippedEvent<Name>>(e) ||
-                       mpark::holds_alternative<StrippedEvent<Member>>(e) ||
-                       mpark::holds_alternative<StrippedEvent<Topic>>(e);
+                return boost::get<StrippedEvent<state::Avatar>>(&e) != nullptr ||
+                       boost::get<StrippedEvent<CanonicalAlias>>(&e) != nullptr ||
+                       boost::get<StrippedEvent<Name>>(&e) != nullptr ||
+                       boost::get<StrippedEvent<Member>>(&e) != nullptr ||
+                       boost::get<StrippedEvent<Topic>>(&e) != nullptr;
         }
 
         void saveInvites(lmdb::txn &txn,
diff --git a/src/ChatPage.h b/src/ChatPage.h
index 9398b443..2000b9e5 100644
--- a/src/ChatPage.h
+++ b/src/ChatPage.h
@@ -18,6 +18,7 @@
 #pragma once
 
 #include <atomic>
+#include <boost/variant.hpp>
 
 #include <QFrame>
 #include <QHBoxLayout>
@@ -249,8 +250,8 @@ ChatPage::getMemberships(const std::vector<Collection> &collection) const
         using Member = mtx::events::StateEvent<mtx::events::state::Member>;
 
         for (const auto &event : collection) {
-                if (mpark::holds_alternative<Member>(event)) {
-                        auto member = mpark::get<Member>(event);
+                if (boost::get<Member>(event) != nullptr) {
+                        auto member = boost::get<Member>(event);
                         memberships.emplace(member.state_key, member);
                 }
         }
diff --git a/src/Olm.cpp b/src/Olm.cpp
index f65430f1..d12542ed 100644
--- a/src/Olm.cpp
+++ b/src/Olm.cpp
@@ -1,3 +1,5 @@
+#include <boost/variant.hpp>
+
 #include "Olm.h"
 
 #include "Cache.h"
@@ -288,14 +290,14 @@ request_keys(const std::string &room_id, const std::string &event_id)
                           return;
                   }
 
-                  if (!mpark::holds_alternative<EncryptedEvent<msg::Encrypted>>(res)) {
+                  if (boost::get<EncryptedEvent<msg::Encrypted>>(&res) == nullptr) {
                           nhlog::net()->info(
                             "retrieved event is not encrypted: {} from {}", event_id, room_id);
                           return;
                   }
 
                   olm::send_key_request_for(room_id,
-                                            mpark::get<EncryptedEvent<msg::Encrypted>>(res));
+                                            boost::get<EncryptedEvent<msg::Encrypted>>(res));
           });
 }
 
diff --git a/src/RoomInfoListItem.cpp b/src/RoomInfoListItem.cpp
index 172cdb90..4edd7b89 100644
--- a/src/RoomInfoListItem.cpp
+++ b/src/RoomInfoListItem.cpp
@@ -20,8 +20,6 @@
 #include <QMouseEvent>
 #include <QPainter>
 
-#include <variant.hpp>
-
 #include "Cache.h"
 #include "Config.h"
 #include "RoomInfoListItem.h"
diff --git a/src/TextInputWidget.cpp b/src/TextInputWidget.cpp
index 74ca072b..3c5fa9e9 100644
--- a/src/TextInputWidget.cpp
+++ b/src/TextInputWidget.cpp
@@ -29,8 +29,6 @@
 #include <QStyleOption>
 #include <QtConcurrent>
 
-#include <variant.hpp>
-
 #include "Cache.h"
 #include "ChatPage.h"
 #include "Config.h"
diff --git a/src/Utils.cpp b/src/Utils.cpp
index ceca53fc..8f7e9992 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -5,7 +5,7 @@
 #include <QSettings>
 #include <cmath>
 
-#include <variant.hpp>
+#include <boost/variant.hpp>
 
 using TimelineEvent = mtx::events::collections::TimelineEvents;
 
@@ -89,24 +89,24 @@ utils::getMessageDescription(const TimelineEvent &event,
         using Video     = mtx::events::RoomEvent<mtx::events::msg::Video>;
         using Encrypted = mtx::events::EncryptedEvent<mtx::events::msg::Encrypted>;
 
-        if (mpark::holds_alternative<Audio>(event)) {
+        if (boost::get<Audio>(&event) != nullptr) {
                 return createDescriptionInfo<Audio>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<Emote>(event)) {
+        } else if (boost::get<Emote>(&event) != nullptr) {
                 return createDescriptionInfo<Emote>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<File>(event)) {
+        } else if (boost::get<File>(&event) != nullptr) {
                 return createDescriptionInfo<File>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<Image>(event)) {
+        } else if (boost::get<Image>(&event) != nullptr) {
                 return createDescriptionInfo<Image>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<Notice>(event)) {
+        } else if (boost::get<Notice>(&event) != nullptr) {
                 return createDescriptionInfo<Notice>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<Text>(event)) {
+        } else if (boost::get<Text>(&event) != nullptr) {
                 return createDescriptionInfo<Text>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<Video>(event)) {
+        } else if (boost::get<Video>(&event) != nullptr) {
                 return createDescriptionInfo<Video>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<mtx::events::Sticker>(event)) {
+        } else if (boost::get<mtx::events::Sticker>(&event) != nullptr) {
                 return createDescriptionInfo<mtx::events::Sticker>(event, localUser, room_id);
-        } else if (mpark::holds_alternative<Encrypted>(event)) {
-                const auto msg    = mpark::get<Encrypted>(event);
+        } else if (boost::get<Encrypted>(&event) != nullptr) {
+                const auto msg    = boost::get<Encrypted>(event);
                 const auto sender = QString::fromStdString(msg.sender);
 
                 const auto username = Cache::displayName(room_id, sender);
@@ -193,21 +193,21 @@ utils::event_body(const mtx::events::collections::TimelineEvents &event)
         using namespace mtx::events;
         using namespace mtx::events::msg;
 
-        if (mpark::holds_alternative<RoomEvent<Audio>>(event)) {
+        if (boost::get<RoomEvent<Audio>>(&event) != nullptr) {
                 return message_body<RoomEvent<Audio>>(event);
-        } else if (mpark::holds_alternative<RoomEvent<Emote>>(event)) {
+        } else if (boost::get<RoomEvent<Emote>>(&event) != nullptr) {
                 return message_body<RoomEvent<Emote>>(event);
-        } else if (mpark::holds_alternative<RoomEvent<File>>(event)) {
+        } else if (boost::get<RoomEvent<File>>(&event) != nullptr) {
                 return message_body<RoomEvent<File>>(event);
-        } else if (mpark::holds_alternative<RoomEvent<Image>>(event)) {
+        } else if (boost::get<RoomEvent<Image>>(&event) != nullptr) {
                 return message_body<RoomEvent<Image>>(event);
-        } else if (mpark::holds_alternative<RoomEvent<Notice>>(event)) {
+        } else if (boost::get<RoomEvent<Notice>>(&event) != nullptr) {
                 return message_body<RoomEvent<Notice>>(event);
-        } else if (mpark::holds_alternative<Sticker>(event)) {
+        } else if (boost::get<Sticker>(&event) != nullptr) {
                 return message_body<Sticker>(event);
-        } else if (mpark::holds_alternative<RoomEvent<Text>>(event)) {
+        } else if (boost::get<RoomEvent<Text>>(&event) != nullptr) {
                 return message_body<RoomEvent<Text>>(event);
-        } else if (mpark::holds_alternative<RoomEvent<Video>>(event)) {
+        } else if (boost::get<RoomEvent<Video>>(&event) != nullptr) {
                 return message_body<RoomEvent<Video>>(event);
         }
 
diff --git a/src/Utils.h b/src/Utils.h
index faa67faa..90c8d9f6 100644
--- a/src/Utils.h
+++ b/src/Utils.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <boost/variant.hpp>
+
 #include "Cache.h"
 #include "RoomInfoListItem.h"
 #include "timeline/widgets/AudioItem.h"
@@ -96,7 +98,7 @@ createDescriptionInfo(const Event &event, const QString &localUser, const QStrin
         using Text  = mtx::events::RoomEvent<mtx::events::msg::Text>;
         using Emote = mtx::events::RoomEvent<mtx::events::msg::Emote>;
 
-        const auto msg    = mpark::get<T>(event);
+        const auto msg    = boost::get<T>(event);
         const auto sender = QString::fromStdString(msg.sender);
 
         const auto username = Cache::displayName(room_id, sender);
@@ -135,25 +137,25 @@ erase_if(ContainerT &items, const PredicateT &predicate)
 inline uint64_t
 event_timestamp(const mtx::events::collections::TimelineEvents &event)
 {
-        return mpark::visit([](auto msg) { return msg.origin_server_ts; }, event);
+        return boost::apply_visitor([](auto msg) { return msg.origin_server_ts; }, event);
 }
 
 inline nlohmann::json
 serialize_event(const mtx::events::collections::TimelineEvents &event)
 {
-        return mpark::visit([](auto msg) { return json(msg); }, event);
+        return boost::apply_visitor([](auto msg) { return json(msg); }, event);
 }
 
 inline mtx::events::EventType
 event_type(const mtx::events::collections::TimelineEvents &event)
 {
-        return mpark::visit([](auto msg) { return msg.type; }, event);
+        return boost::apply_visitor([](auto msg) { return msg.type; }, event);
 }
 
 inline std::string
 event_id(const mtx::events::collections::TimelineEvents &event)
 {
-        return mpark::visit([](auto msg) { return msg.event_id; }, event);
+        return boost::apply_visitor([](auto msg) { return msg.event_id; }, event);
 }
 
 inline QString
@@ -165,14 +167,15 @@ eventId(const mtx::events::collections::TimelineEvents &event)
 inline QString
 event_sender(const mtx::events::collections::TimelineEvents &event)
 {
-        return mpark::visit([](auto msg) { return QString::fromStdString(msg.sender); }, event);
+        return boost::apply_visitor([](auto msg) { return QString::fromStdString(msg.sender); },
+                                    event);
 }
 
 template<class T>
 QString
 message_body(const mtx::events::collections::TimelineEvents &event)
 {
-        return QString::fromStdString(mpark::get<T>(event).content.body);
+        return QString::fromStdString(boost::get<T>(event).content.body);
 }
 
 //! Calculate the Levenshtein distance between two strings with character skipping.
@@ -192,4 +195,4 @@ humanReadableFingerprint(const std::string &ed25519);
 
 QString
 humanReadableFingerprint(const QString &ed25519);
-}
\ No newline at end of file
+}
diff --git a/src/timeline/TimelineView.cpp b/src/timeline/TimelineView.cpp
index 887d4d4f..bf828a8e 100644
--- a/src/timeline/TimelineView.cpp
+++ b/src/timeline/TimelineView.cpp
@@ -15,6 +15,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <boost/variant.hpp>
+
 #include <QApplication>
 #include <QFileInfo>
 #include <QTimer>
@@ -223,8 +225,8 @@ TimelineView::parseMessageEvent(const mtx::events::collections::TimelineEvents &
         using TextEvent   = RoomEvent<msg::Text>;
         using VideoEvent  = RoomEvent<msg::Video>;
 
-        if (mpark::holds_alternative<RedactionEvent<msg::Redaction>>(event)) {
-                auto redaction_event = mpark::get<RedactionEvent<msg::Redaction>>(event);
+        if (boost::get<RedactionEvent<msg::Redaction>>(&event) != nullptr) {
+                auto redaction_event = boost::get<RedactionEvent<msg::Redaction>>(event);
                 const auto event_id  = QString::fromStdString(redaction_event.redacts);
 
                 QTimer::singleShot(0, this, [event_id, this]() {
@@ -233,8 +235,8 @@ TimelineView::parseMessageEvent(const mtx::events::collections::TimelineEvents &
                 });
 
                 return nullptr;
-        } else if (mpark::holds_alternative<StateEvent<state::Encryption>>(event)) {
-                auto msg      = mpark::get<StateEvent<state::Encryption>>(event);
+        } else if (boost::get<StateEvent<state::Encryption>>(&event) != nullptr) {
+                auto msg      = boost::get<StateEvent<state::Encryption>>(event);
                 auto event_id = QString::fromStdString(msg.event_id);
 
                 if (eventIds_.contains(event_id))
@@ -248,32 +250,32 @@ TimelineView::parseMessageEvent(const mtx::events::collections::TimelineEvents &
                 saveMessageInfo("", msg.origin_server_ts, direction);
 
                 return item;
-        } else if (mpark::holds_alternative<RoomEvent<msg::Audio>>(event)) {
-                auto audio = mpark::get<RoomEvent<msg::Audio>>(event);
+        } else if (boost::get<RoomEvent<msg::Audio>>(&event) != nullptr) {
+                auto audio = boost::get<RoomEvent<msg::Audio>>(event);
                 return processMessageEvent<AudioEvent, AudioItem>(audio, direction);
-        } else if (mpark::holds_alternative<RoomEvent<msg::Emote>>(event)) {
-                auto emote = mpark::get<RoomEvent<msg::Emote>>(event);
+        } else if (boost::get<RoomEvent<msg::Emote>>(&event) != nullptr) {
+                auto emote = boost::get<RoomEvent<msg::Emote>>(event);
                 return processMessageEvent<EmoteEvent>(emote, direction);
-        } else if (mpark::holds_alternative<RoomEvent<msg::File>>(event)) {
-                auto file = mpark::get<RoomEvent<msg::File>>(event);
+        } else if (boost::get<RoomEvent<msg::File>>(&event) != nullptr) {
+                auto file = boost::get<RoomEvent<msg::File>>(event);
                 return processMessageEvent<FileEvent, FileItem>(file, direction);
-        } else if (mpark::holds_alternative<RoomEvent<msg::Image>>(event)) {
-                auto image = mpark::get<RoomEvent<msg::Image>>(event);
+        } else if (boost::get<RoomEvent<msg::Image>>(&event) != nullptr) {
+                auto image = boost::get<RoomEvent<msg::Image>>(event);
                 return processMessageEvent<ImageEvent, ImageItem>(image, direction);
-        } else if (mpark::holds_alternative<RoomEvent<msg::Notice>>(event)) {
-                auto notice = mpark::get<RoomEvent<msg::Notice>>(event);
+        } else if (boost::get<RoomEvent<msg::Notice>>(&event) != nullptr) {
+                auto notice = boost::get<RoomEvent<msg::Notice>>(event);
                 return processMessageEvent<NoticeEvent>(notice, direction);
-        } else if (mpark::holds_alternative<RoomEvent<msg::Text>>(event)) {
-                auto text = mpark::get<RoomEvent<msg::Text>>(event);
+        } else if (boost::get<RoomEvent<msg::Text>>(&event) != nullptr) {
+                auto text = boost::get<RoomEvent<msg::Text>>(event);
                 return processMessageEvent<TextEvent>(text, direction);
-        } else if (mpark::holds_alternative<RoomEvent<msg::Video>>(event)) {
-                auto video = mpark::get<RoomEvent<msg::Video>>(event);
+        } else if (boost::get<RoomEvent<msg::Video>>(&event) != nullptr) {
+                auto video = boost::get<RoomEvent<msg::Video>>(event);
                 return processMessageEvent<VideoEvent, VideoItem>(video, direction);
-        } else if (mpark::holds_alternative<Sticker>(event)) {
-                return processMessageEvent<Sticker, StickerItem>(mpark::get<Sticker>(event),
+        } else if (boost::get<Sticker>(&event) != nullptr) {
+                return processMessageEvent<Sticker, StickerItem>(boost::get<Sticker>(event),
                                                                  direction);
-        } else if (mpark::holds_alternative<EncryptedEvent<msg::Encrypted>>(event)) {
-                auto res = parseEncryptedEvent(mpark::get<EncryptedEvent<msg::Encrypted>>(event));
+        } else if (boost::get<EncryptedEvent<msg::Encrypted>>(&event) != nullptr) {
+                auto res = parseEncryptedEvent(boost::get<EncryptedEvent<msg::Encrypted>>(event));
                 auto widget = parseMessageEvent(res.event, direction);
 
                 if (widget == nullptr)