highlight tabs only on unviewed messages (#5649)

CHANGELOG.md

@@ -37,6 +37,7 @@
 - Minor: Indicate when subscriptions and resubscriptions are for multiple months. (#5642)
 - Minor: Proxy URL information is now included in the `/debug-env` command. (#5648)
 - Minor: Make raid entry message usernames clickable. (#5651)
+- Minor: Tabs unhighlight when their content is read in other tabs. (#5649)
 - Bugfix: Fixed tab move animation occasionally failing to start after closing a tab. (#5426, #5612)
 - Bugfix: If a network request errors with 200 OK, Qt's error code is now reported instead of the HTTP status. (#5378)
 - Bugfix: Fixed restricted users usernames not being clickable. (#5405)
@@ -63,6 +64,7 @@
 - Bugfix: Fixed double-click selection not working when clicking outside a message. (#5617)
 - Bugfix: Fixed emotes starting with ":" not tab-completing. (#5603)
 - Bugfix: Fixed 7TV emotes messing with Qt's HTML. (#5677)
+- Bugfix: Fixed incorrect messages getting replaced visually. (#5683)
 - Dev: Update Windows build from Qt 6.5.0 to Qt 6.7.1. (#5420)
 - Dev: Update vcpkg build Qt from 6.5.0 to 6.7.0, boost from 1.83.0 to 1.85.0, openssl from 3.1.3 to 3.3.0. (#5422)
 - Dev: Unsingletonize `ISoundController`. (#5462)
@@ -75,7 +77,7 @@
 - Dev: Removed unused timegate settings. (#5361)
 - Dev: Add `Channel::addSystemMessage` helper function, allowing us to avoid the common `channel->addMessage(makeSystemMessage(...));` pattern. (#5500)
 - Dev: Unsingletonize `Resources2`. (#5460)
-- Dev: All Lua globals now show in the `c2` global in the LuaLS metadata. (#5385)
+- Dev: All Lua globals now show in the `c2` global in the LuaLS metadata. (#5385, #5682)
 - Dev: Images are now loaded in worker threads. (#5431)
 - Dev: Fixed broken `SignalVector::operator[]` implementation. (#5556)
 - Dev: Qt Creator now auto-configures Conan when loading the project and skips vcpkg. (#5305)
@@ -110,11 +112,12 @@
 - Dev: Twitch messages are now sent using Twitch's Helix API instead of IRC by default. (#5607)
 - Dev: `GIFTimer` is no longer initialized in tests. (#5608)
 - Dev: Emojis now use flags instead of a set of strings for capabilities. (#5616)
-- Dev: Move plugins to Sol2. (#5622)
+- Dev: Move plugins to Sol2. (#5622, #5682)
 - Dev: Refactored static `MessageBuilder` helpers to standalone functions. (#5652)
 - Dev: Decoupled reply parsing from `MessageBuilder`. (#5660, #5668)
 - Dev: Refactored IRC message building. (#5663)
 - Dev: Fixed some compiler warnings. (#5672)
+- Dev: Unified parsing of historic and live IRC messages. (#5678)
 
 ## 2.5.1
 

docs/plugin-meta.lua

@@ -5,20 +5,20 @@
 -- Add the folder this file is in to "Lua.workspace.library".
 
 c2 = {}
----@alias c2.LogLevel.Debug "c2.LogLevel.Debug"
+---@enum c2.LogLevel
----@alias c2.LogLevel.Info "c2.LogLevel.Info"
+c2.LogLevel = {
----@alias c2.LogLevel.Warning "c2.LogLevel.Warning"
+    Debug = {}, ---@type c2.LogLevel.Debug
----@alias c2.LogLevel.Critical "c2.LogLevel.Critical"
+    Info = {}, ---@type c2.LogLevel.Info
----@alias c2.LogLevel c2.LogLevel.Debug|c2.LogLevel.Info|c2.LogLevel.Warning|c2.LogLevel.Critical
+    Warning = {}, ---@type c2.LogLevel.Warning
----@type { Debug: c2.LogLevel.Debug, Info: c2.LogLevel.Info, Warning: c2.LogLevel.Warning, Critical: c2.LogLevel.Critical }
+    Critical = {}, ---@type c2.LogLevel.Critical
-c2.LogLevel = {}
+}
 
 -- Begin src/controllers/plugins/api/EventType.hpp
 
----@alias c2.EventType.CompletionRequested "c2.EventType.CompletionRequested"
+---@enum c2.EventType
----@alias c2.EventType c2.EventType.CompletionRequested
+c2.EventType = {
----@type { CompletionRequested: c2.EventType.CompletionRequested }
+    CompletionRequested = {}, ---@type c2.EventType.CompletionRequested
-c2.EventType = {}
+}
 
 -- End src/controllers/plugins/api/EventType.hpp
 
@@ -38,19 +38,19 @@ c2.EventType = {}
 
 -- Begin src/common/Channel.hpp
 
----@alias c2.ChannelType.None "c2.ChannelType.None"
+---@enum c2.ChannelType
----@alias c2.ChannelType.Direct "c2.ChannelType.Direct"
+c2.ChannelType = {
----@alias c2.ChannelType.Twitch "c2.ChannelType.Twitch"
+    None = {}, ---@type c2.ChannelType.None
----@alias c2.ChannelType.TwitchWhispers "c2.ChannelType.TwitchWhispers"
+    Direct = {}, ---@type c2.ChannelType.Direct
----@alias c2.ChannelType.TwitchWatching "c2.ChannelType.TwitchWatching"
+    Twitch = {}, ---@type c2.ChannelType.Twitch
----@alias c2.ChannelType.TwitchMentions "c2.ChannelType.TwitchMentions"
+    TwitchWhispers = {}, ---@type c2.ChannelType.TwitchWhispers
----@alias c2.ChannelType.TwitchLive "c2.ChannelType.TwitchLive"
+    TwitchWatching = {}, ---@type c2.ChannelType.TwitchWatching
----@alias c2.ChannelType.TwitchAutomod "c2.ChannelType.TwitchAutomod"
+    TwitchMentions = {}, ---@type c2.ChannelType.TwitchMentions
----@alias c2.ChannelType.TwitchEnd "c2.ChannelType.TwitchEnd"
+    TwitchLive = {}, ---@type c2.ChannelType.TwitchLive
----@alias c2.ChannelType.Misc "c2.ChannelType.Misc"
+    TwitchAutomod = {}, ---@type c2.ChannelType.TwitchAutomod
----@alias c2.ChannelType c2.ChannelType.None|c2.ChannelType.Direct|c2.ChannelType.Twitch|c2.ChannelType.TwitchWhispers|c2.ChannelType.TwitchWatching|c2.ChannelType.TwitchMentions|c2.ChannelType.TwitchLive|c2.ChannelType.TwitchAutomod|c2.ChannelType.TwitchEnd|c2.ChannelType.Misc
+    TwitchEnd = {}, ---@type c2.ChannelType.TwitchEnd
----@type { None: c2.ChannelType.None, Direct: c2.ChannelType.Direct, Twitch: c2.ChannelType.Twitch, TwitchWhispers: c2.ChannelType.TwitchWhispers, TwitchWatching: c2.ChannelType.TwitchWatching, TwitchMentions: c2.ChannelType.TwitchMentions, TwitchLive: c2.ChannelType.TwitchLive, TwitchAutomod: c2.ChannelType.TwitchAutomod, TwitchEnd: c2.ChannelType.TwitchEnd, Misc: c2.ChannelType.Misc }
+    Misc = {}, ---@type c2.ChannelType.Misc
-c2.ChannelType = {}
+}
 
 -- End src/common/Channel.hpp
 
@@ -174,90 +174,97 @@ function c2.Channel.by_twitch_id(id) end
 
 -- Begin src/controllers/plugins/api/HTTPResponse.hpp
 
----@class HTTPResponse
+---@class c2.HTTPResponse
-HTTPResponse = {}
+c2.HTTPResponse = {}
 
 --- Returns the data. This is not guaranteed to be encoded using any
 --- particular encoding scheme. It's just the bytes the server returned.
 ---
-function HTTPResponse:data() end
+---@return string
+---@nodiscard
+function c2.HTTPResponse:data() end
 
 --- Returns the status code.
 ---
-function HTTPResponse:status() end
+---@return number|nil
+---@nodiscard
+function c2.HTTPResponse:status() end
 
 --- A somewhat human readable description of an error if such happened
 ---
-function HTTPResponse:error() end
+---@return string
+---@nodiscard
+function c2.HTTPResponse:error() end
 
 ---@return string
-function HTTPResponse:__tostring() end
+---@nodiscard
+function c2.HTTPResponse:__tostring() end
 
 -- End src/controllers/plugins/api/HTTPResponse.hpp
 
 -- Begin src/controllers/plugins/api/HTTPRequest.hpp
 
----@alias HTTPCallback fun(result: HTTPResponse): nil
+---@alias c2.HTTPCallback fun(result: c2.HTTPResponse): nil
----@class HTTPRequest
+---@class c2.HTTPRequest
-HTTPRequest = {}
+c2.HTTPRequest = {}
 
 --- Sets the success callback
 ---
----@param callback HTTPCallback Function to call when the HTTP request succeeds
+---@param callback c2.HTTPCallback Function to call when the HTTP request succeeds
-function HTTPRequest:on_success(callback) end
+function c2.HTTPRequest:on_success(callback) end
 
 --- Sets the failure callback
 ---
----@param callback HTTPCallback Function to call when the HTTP request fails or returns a non-ok status
+---@param callback c2.HTTPCallback Function to call when the HTTP request fails or returns a non-ok status
-function HTTPRequest:on_error(callback) end
+function c2.HTTPRequest:on_error(callback) end
 
 --- Sets the finally callback
 ---
 ---@param callback fun(): nil Function to call when the HTTP request finishes
-function HTTPRequest:finally(callback) end
+function c2.HTTPRequest:finally(callback) end
 
 --- Sets the timeout
 ---
 ---@param timeout integer How long in milliseconds until the times out
-function HTTPRequest:set_timeout(timeout) end
+function c2.HTTPRequest:set_timeout(timeout) end
 
 --- Sets the request payload
 ---
 ---@param data string
-function HTTPRequest:set_payload(data) end
+function c2.HTTPRequest:set_payload(data) end
 
 --- Sets a header in the request
 ---
 ---@param name string
 ---@param value string
-function HTTPRequest:set_header(name, value) end
+function c2.HTTPRequest:set_header(name, value) end
 
 --- Executes the HTTP request
 ---
-function HTTPRequest:execute() end
+function c2.HTTPRequest:execute() end
 
 ---@return string
-function HTTPRequest:__tostring() end
+function c2.HTTPRequest:__tostring() end
 
 --- Creates a new HTTPRequest
 ---
----@param method HTTPMethod Method to use
+---@param method c2.HTTPMethod Method to use
 ---@param url string Where to send the request to
----@return HTTPRequest
+---@return c2.HTTPRequest
-function HTTPRequest.create(method, url) end
+function c2.HTTPRequest.create(method, url) end
 
 -- End src/controllers/plugins/api/HTTPRequest.hpp
 
 -- Begin src/common/network/NetworkCommon.hpp
 
----@alias HTTPMethod.Get "HTTPMethod.Get"
+---@enum c2.HTTPMethod
----@alias HTTPMethod.Post "HTTPMethod.Post"
+c2.HTTPMethod = {
----@alias HTTPMethod.Put "HTTPMethod.Put"
+    Get = {}, ---@type c2.HTTPMethod.Get
----@alias HTTPMethod.Delete "HTTPMethod.Delete"
+    Post = {}, ---@type c2.HTTPMethod.Post
----@alias HTTPMethod.Patch "HTTPMethod.Patch"
+    Put = {}, ---@type c2.HTTPMethod.Put
----@alias HTTPMethod HTTPMethod.Get|HTTPMethod.Post|HTTPMethod.Put|HTTPMethod.Delete|HTTPMethod.Patch
+    Delete = {}, ---@type c2.HTTPMethod.Delete
----@type { Get: HTTPMethod.Get, Post: HTTPMethod.Post, Put: HTTPMethod.Put, Delete: HTTPMethod.Delete, Patch: HTTPMethod.Patch }
+    Patch = {}, ---@type c2.HTTPMethod.Patch
-HTTPMethod = {}
+}
 
 -- End src/common/network/NetworkCommon.hpp
 

scripts/make_luals_meta.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 This script generates docs/plugin-meta.lua. It accepts no arguments
 
@@ -242,25 +243,19 @@ def read_file(path: Path, out: TextIOWrapper):
                 )
             name = header[0].split(" ", 1)[1]
             printmsg(path, reader.line_no(), f"enum {name}")
-            variants = reader.read_enum_variants()
-
-            vtypes = []
-            for variant in variants:
-                vtype = f'{name}.{variant}'
-                vtypes.append(vtype)
-                out.write(f'---@alias {vtype} "{vtype}"\n')
-
-            out.write(f"---@alias {name} {'|'.join(vtypes)}\n")
             if header_comment:
                 out.write(f"--- {header_comment}\n")
-            out.write("---@type { ")
+            out.write(f"---@enum {name}\n")
+            out.write(f"{name} = {{\n")
             out.write(
-                ", ".join(
+                "\n".join(
-                    [f"{variant}: {typ}" for variant, typ in zip(variants,vtypes)]
+                    [
+                        f"    {variant} = {{}}, ---@type {name}.{variant}"
+                        for variant in reader.read_enum_variants()
+                    ]
                 )
             )
-            out.write(" }\n")
+            out.write("\n}\n\n")
-            out.write(f"{name} = {{}}\n\n")
             continue
 
         # class

src/CMakeLists.txt

@@ -40,6 +40,7 @@ set(SOURCE_FILES
         common/WindowDescriptors.cpp
         common/WindowDescriptors.hpp
 
+        common/enums/MessageContext.hpp
         common/enums/MessageOverflow.hpp
 
         common/network/NetworkCommon.cpp
@@ -282,6 +283,9 @@ set(SOURCE_FILES
         messages/MessageElement.cpp
         messages/MessageElement.hpp
         messages/MessageFlag.hpp
+        messages/MessageSimilarity.cpp
+        messages/MessageSimilarity.hpp
+        messages/MessageSink.hpp
         messages/MessageThread.cpp
         messages/MessageThread.hpp
 
@@ -527,6 +531,8 @@ set(SOURCE_FILES
         util/Twitch.hpp
         util/TypeName.hpp
         util/Variant.hpp
+        util/VectorMessageSink.cpp
+        util/VectorMessageSink.hpp
         util/WidgetHelpers.cpp
         util/WidgetHelpers.hpp
         util/WindowsHelper.cpp

src/common/Channel.cpp

@@ -3,7 +3,9 @@
 #include "Application.hpp"
 #include "messages/Message.hpp"
 #include "messages/MessageBuilder.hpp"
+#include "messages/MessageSimilarity.hpp"
 #include "providers/twitch/IrcMessageHandler.hpp"
+#include "providers/twitch/TwitchIrcServer.hpp"
 #include "singletons/Emotes.hpp"
 #include "singletons/Logging.hpp"
 #include "singletons/Settings.hpp"
@@ -121,10 +123,10 @@ void Channel::addSystemMessage(const QString &contents)
     this->addMessage(msg, MessageContext::Original);
 }
 
-void Channel::addOrReplaceTimeout(MessagePtr message)
+void Channel::addOrReplaceTimeout(MessagePtr message, QTime now)
 {
     addOrReplaceChannelTimeout(
-        this->getMessageSnapshot(), std::move(message), QTime::currentTime(),
+        this->getMessageSnapshot(), std::move(message), now,
         [this](auto /*idx*/, auto msg, auto replacement) {
             this->replaceMessage(msg, replacement);
         },
@@ -253,21 +255,33 @@ void Channel::fillInMissingMessages(const std::vector<MessagePtr> &messages)
     }
 }
 
-void Channel::replaceMessage(MessagePtr message, MessagePtr replacement)
+void Channel::replaceMessage(const MessagePtr &message,
+                             const MessagePtr &replacement)
 {
     int index = this->messages_.replaceItem(message, replacement);
 
     if (index >= 0)
     {
-        this->messageReplaced.invoke((size_t)index, replacement);
+        this->messageReplaced.invoke((size_t)index, message, replacement);
     }
 }
 
-void Channel::replaceMessage(size_t index, MessagePtr replacement)
+void Channel::replaceMessage(size_t index, const MessagePtr &replacement)
 {
-    if (this->messages_.replaceItem(index, replacement))
+    MessagePtr prev;
+    if (this->messages_.replaceItem(index, replacement, &prev))
     {
-        this->messageReplaced.invoke(index, replacement);
+        this->messageReplaced.invoke(index, prev, replacement);
+    }
+}
+
+void Channel::replaceMessage(size_t hint, const MessagePtr &message,
+                             const MessagePtr &replacement)
+{
+    auto index = this->messages_.replaceItem(hint, message, replacement);
+    if (index >= 0)
+    {
+        this->messageReplaced.invoke(hint, message, replacement);
     }
 }
 
@@ -287,10 +301,15 @@ void Channel::clearMessages()
 }
 
 MessagePtr Channel::findMessage(QString messageID)
+{
+    return this->findMessageByID(messageID);
+}
+
+MessagePtr Channel::findMessageByID(QStringView messageID)
 {
     MessagePtr res;
 
-    if (auto msg = this->messages_.rfind([&messageID](const MessagePtr &msg) {
+    if (auto msg = this->messages_.rfind([messageID](const MessagePtr &msg) {
             return msg->id == messageID;
         });
         msg)
@@ -301,6 +320,19 @@ MessagePtr Channel::findMessage(QString messageID)
     return res;
 }
 
+void Channel::applySimilarityFilters(const MessagePtr &message) const
+{
+    setSimilarityFlags(message, this->messages_.getSnapshot());
+}
+
+MessageSinkTraits Channel::sinkTraits() const
+{
+    return {
+        MessageSinkTrait::AddMentionsToGlobalChannel,
+        MessageSinkTrait::RequiresKnownChannelPointReward,
+    };
+}
+
 bool Channel::canSendMessage() const
 {
     return false;

src/common/Channel.hpp

@@ -1,8 +1,10 @@
 #pragma once
 
+#include "common/enums/MessageContext.hpp"
 #include "controllers/completion/TabCompletionModel.hpp"
 #include "messages/LimitedQueue.hpp"
 #include "messages/MessageFlag.hpp"
+#include "messages/MessageSink.hpp"
 
 #include <magic_enum/magic_enum.hpp>
 #include <pajlada/signals/signal.hpp>
@@ -26,15 +28,7 @@ enum class TimeoutStackStyle : int {
     Default = DontStackBeyondUserMessage,
 };
 
-/// Context of the message being added to a channel
+class Channel : public std::enable_shared_from_this<Channel>, public MessageSink
-enum class MessageContext {
-    /// This message is the original
-    Original,
-    /// This message is a repost of a message that has already been added in a channel
-    Repost,
-};
-
-class Channel : public std::enable_shared_from_this<Channel>
 {
 public:
     // This is for Lua. See scripts/make_luals_meta.py
@@ -55,7 +49,7 @@ public:
     };
 
     explicit Channel(const QString &name, Type type);
-    virtual ~Channel();
+    ~Channel() override;
 
     // SIGNALS
     pajlada::Signals::Signal<const QString &, const QString &, bool &>
@@ -66,7 +60,9 @@ public:
     pajlada::Signals::Signal<MessagePtr &, std::optional<MessageFlags>>
         messageAppended;
     pajlada::Signals::Signal<std::vector<MessagePtr> &> messagesAddedAtStart;
-    pajlada::Signals::Signal<size_t, MessagePtr &> messageReplaced;
+    /// (index, prev-message, replacement)
+    pajlada::Signals::Signal<size_t, const MessagePtr &, const MessagePtr &>
+        messageReplaced;
     /// Invoked when some number of messages were filled in using time received
     pajlada::Signals::Signal<const std::vector<MessagePtr> &> filledInMessages;
     pajlada::Signals::NoArgSignal destroyed;
@@ -85,8 +81,9 @@ public:
     // overridingFlags can be filled in with flags that should be used instead
     // of the message's flags. This is useful in case a flag is specific to a
     // type of split
-    void addMessage(MessagePtr message, MessageContext context,
+    void addMessage(
-                    std::optional<MessageFlags> overridingFlags = std::nullopt);
+        MessagePtr message, MessageContext context,
+        std::optional<MessageFlags> overridingFlags = std::nullopt) final;
     void addMessagesAtStart(const std::vector<MessagePtr> &messages_);
 
     void addSystemMessage(const QString &contents);
@@ -94,19 +91,28 @@ public:
     /// Inserts the given messages in order by Message::serverReceivedTime.
     void fillInMissingMessages(const std::vector<MessagePtr> &messages);
 
-    void addOrReplaceTimeout(MessagePtr message);
+    void addOrReplaceTimeout(MessagePtr message, QTime now) final;
-    void disableAllMessages();
+    void disableAllMessages() final;
-    void replaceMessage(MessagePtr message, MessagePtr replacement);
+    void replaceMessage(const MessagePtr &message,
-    void replaceMessage(size_t index, MessagePtr replacement);
+                        const MessagePtr &replacement);
+    void replaceMessage(size_t index, const MessagePtr &replacement);
+    void replaceMessage(size_t hint, const MessagePtr &message,
+                        const MessagePtr &replacement);
     void deleteMessage(QString messageID);
 
     /// Removes all messages from this channel and invokes #messagesCleared
     void clearMessages();
 
-    MessagePtr findMessage(QString messageID);
+    [[deprecated("Use findMessageByID instead")]] MessagePtr findMessage(
+        QString messageID);
+    MessagePtr findMessageByID(QStringView messageID) final;
 
     bool hasMessages() const;
 
+    void applySimilarityFilters(const MessagePtr &message) const final;
+
+    MessageSinkTraits sinkTraits() const final;
+
     // CHANNEL INFO
     virtual bool canSendMessage() const;
     virtual bool isWritable() const;  // whether split input will be usable

src/common/enums/MessageContext.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+namespace chatterino {
+
+/// Context of the message being added to a channel
+enum class MessageContext {
+    /// This message is the original
+    Original,
+    /// This message is a repost of a message that has already been added in a channel
+    Repost,
+};
+
+}  // namespace chatterino

src/common/network/NetworkCommon.hpp

@@ -16,7 +16,7 @@ using NetworkErrorCallback = std::function<void(NetworkResult)>;
 using NetworkFinallyCallback = std::function<void()>;
 
 /**
- * @exposeenum HTTPMethod
+ * @exposeenum c2.HTTPMethod
  */
 enum class NetworkRequestType {
     Get,

src/controllers/plugins/api/HTTPRequest.hpp

@@ -16,11 +16,11 @@ namespace chatterino::lua::api {
 // NOLINTBEGIN(readability-identifier-naming)
 
 /**
- * @lua@alias HTTPCallback fun(result: HTTPResponse): nil
+ * @lua@alias c2.HTTPCallback fun(result: c2.HTTPResponse): nil
  */
 
 /**
- * @lua@class HTTPRequest
+ * @lua@class c2.HTTPRequest
  */
 class HTTPRequest : public std::enable_shared_from_this<HTTPRequest>
 {
@@ -61,16 +61,16 @@ public:
     /**
      * Sets the success callback
      *
-     * @lua@param callback HTTPCallback Function to call when the HTTP request succeeds
+     * @lua@param callback c2.HTTPCallback Function to call when the HTTP request succeeds
-     * @exposed HTTPRequest:on_success
+     * @exposed c2.HTTPRequest:on_success
      */
     void on_success(sol::protected_function func);
 
     /**
      * Sets the failure callback
      *
-     * @lua@param callback HTTPCallback Function to call when the HTTP request fails or returns a non-ok status
+     * @lua@param callback c2.HTTPCallback Function to call when the HTTP request fails or returns a non-ok status
-     * @exposed HTTPRequest:on_error
+     * @exposed c2.HTTPRequest:on_error
      */
     void on_error(sol::protected_function func);
 
@@ -78,7 +78,7 @@ public:
      * Sets the finally callback
      *
      * @lua@param callback fun(): nil Function to call when the HTTP request finishes
-     * @exposed HTTPRequest:finally
+     * @exposed c2.HTTPRequest:finally
      */
     void finally(sol::protected_function func);
 
@@ -86,7 +86,7 @@ public:
      * Sets the timeout
      *
      * @lua@param timeout integer How long in milliseconds until the times out
-     * @exposed HTTPRequest:set_timeout
+     * @exposed c2.HTTPRequest:set_timeout
      */
     void set_timeout(int timeout);
 
@@ -94,7 +94,7 @@ public:
      * Sets the request payload
      *
      * @lua@param data string
-     * @exposed HTTPRequest:set_payload
+     * @exposed c2.HTTPRequest:set_payload
      */
     void set_payload(QByteArray payload);
 
@@ -103,19 +103,19 @@ public:
      *
      * @lua@param name string
      * @lua@param value string
-     * @exposed HTTPRequest:set_header
+     * @exposed c2.HTTPRequest:set_header
      */
     void set_header(QByteArray name, QByteArray value);
 
     /**
      * Executes the HTTP request
      *
-     * @exposed HTTPRequest:execute
+     * @exposed c2.HTTPRequest:execute
      */
     void execute(sol::this_state L);
     /**
      * @lua@return string
-     * @exposed HTTPRequest:__tostring
+     * @exposed c2.HTTPRequest:__tostring
      */
     QString to_string();
 
@@ -126,11 +126,11 @@ public:
     /**
      * Creates a new HTTPRequest
      *
-     * @lua@param method HTTPMethod Method to use
+     * @lua@param method c2.HTTPMethod Method to use
      * @lua@param url string Where to send the request to
      *
-     * @lua@return HTTPRequest
+     * @lua@return c2.HTTPRequest
-     * @exposed HTTPRequest.create
+     * @exposed c2.HTTPRequest.create
      */
     static std::shared_ptr<HTTPRequest> create(sol::this_state L,
                                                NetworkRequestType method,

src/controllers/plugins/api/HTTPResponse.hpp

@@ -15,7 +15,7 @@ namespace chatterino::lua::api {
 // NOLINTBEGIN(readability-identifier-naming)
 
 /**
- * @lua@class HTTPResponse
+ * @lua@class c2.HTTPResponse
  */
 class HTTPResponse
 {
@@ -38,26 +38,34 @@ public:
      * Returns the data. This is not guaranteed to be encoded using any
      * particular encoding scheme. It's just the bytes the server returned.
      * 
-     * @exposed HTTPResponse:data
+     * @lua@return string
+     * @lua@nodiscard
+     * @exposed c2.HTTPResponse:data
      */
     QByteArray data();
 
     /**
      * Returns the status code.
      *
-     * @exposed HTTPResponse:status
+     * @lua@return number|nil
+     * @lua@nodiscard
+     * @exposed c2.HTTPResponse:status
      */
     std::optional<int> status();
 
     /**
      * A somewhat human readable description of an error if such happened
-     * @exposed HTTPResponse:error
+     *
+     * @lua@return string
+     * @lua@nodiscard
+     * @exposed c2.HTTPResponse:error
      */
     QString error();
 
     /**
      * @lua@return string
-     * @exposed HTTPResponse:__tostring
+     * @lua@nodiscard
+     * @exposed c2.HTTPResponse:__tostring
      */
     QString to_string();
 };

src/messages/LimitedQueue.hpp

@@ -8,6 +8,7 @@
 #include <mutex>
 #include <optional>
 #include <shared_mutex>
+#include <utility>
 #include <vector>
 
 namespace chatterino {
@@ -212,9 +213,10 @@ public:
      *
      * @param[in] index the index of the item to replace
      * @param[in] replacement the item to put in place of the item at index
+     * @param[out] prev (optional) the item located at @a index before replacing
      * @return true if a replacement took place
      */
-    bool replaceItem(size_t index, const T &replacement)
+    bool replaceItem(size_t index, const T &replacement, T *prev = nullptr)
     {
         std::unique_lock lock(this->mutex_);
 
@@ -223,10 +225,46 @@ public:
             return false;
         }
 
-        this->buffer_[index] = replacement;
+        if (prev)
+        {
+            *prev = std::exchange(this->buffer_[index], replacement);
+        }
+        else
+        {
+            this->buffer_[index] = replacement;
+        }
         return true;
     }
 
+    /**
+     * @brief Replace the needle with the given item
+     *
+     * @param hint A hint on where the needle _might_ be
+     * @param[in] needle the item to search for
+     * @param[in] replacement the item to replace needle with
+     * @return the index of the replaced item, or -1 if no replacement took place
+     */
+    int replaceItem(size_t hint, const T &needle, const T &replacement)
+    {
+        std::unique_lock lock(this->mutex_);
+
+        if (hint < this->buffer_.size() && this->buffer_[hint] == needle)
+        {
+            this->buffer_[hint] = replacement;
+            return static_cast<int>(hint);
+        }
+
+        for (size_t i = 0; i < this->buffer_.size(); ++i)
+        {
+            if (this->buffer_[i] == needle)
+            {
+                this->buffer_[i] = replacement;
+                return static_cast<int>(i);
+            }
+        }
+        return -1;
+    }
+
     /**
      * @brief Inserts the given item before another item
      * 
@@ -315,6 +353,32 @@ public:
         return std::nullopt;
     }
 
+    /**
+     * @brief Find an item with a hint
+     *
+     * @param hint A hint on where the needle _might_ be
+     * @param predicate that will used to find the item
+     * @return the item and its index or none if it's not found
+     */
+    std::optional<std::pair<size_t, T>> find(size_t hint, auto &&predicate)
+    {
+        std::unique_lock lock(this->mutex_);
+
+        if (hint < this->buffer_.size() && predicate(this->buffer_[hint]))
+        {
+            return std::pair{hint, this->buffer_[hint]};
+        };
+
+        for (size_t i = 0; i < this->buffer_.size(); i++)
+        {
+            if (predicate(this->buffer_[i]))
+            {
+                return std::pair{i, this->buffer_[i]};
+            }
+        }
+        return std::nullopt;
+    }
+
     /**
      * @brief Returns the first item matching a predicate, checking in reverse
      * 

src/messages/MessageSimilarity.cpp

@@ -0,0 +1,121 @@
+#include "messages/MessageSimilarity.hpp"
+
+#include "Application.hpp"
+#include "controllers/accounts/AccountController.hpp"
+#include "messages/LimitedQueueSnapshot.hpp"  // IWYU pragma: keep
+#include "providers/twitch/TwitchAccount.hpp"
+#include "singletons/Settings.hpp"
+
+#include <algorithm>
+#include <vector>
+
+namespace {
+
+using namespace chatterino;
+
+float relativeSimilarity(QStringView str1, QStringView str2)
+{
+    using SizeType = QStringView::size_type;
+
+    // Longest Common Substring Problem
+    std::vector<std::vector<int>> tree(str1.size(),
+                                       std::vector<int>(str2.size(), 0));
+    int z = 0;
+
+    for (SizeType i = 0; i < str1.size(); ++i)
+    {
+        for (SizeType j = 0; j < str2.size(); ++j)
+        {
+            if (str1[i] == str2[j])
+            {
+                if (i == 0 || j == 0)
+                {
+                    tree[i][j] = 1;
+                }
+                else
+                {
+                    tree[i][j] = tree[i - 1][j - 1] + 1;
+                }
+                z = std::max(tree[i][j], z);
+            }
+            else
+            {
+                tree[i][j] = 0;
+            }
+        }
+    }
+
+    // ensure that no div by 0
+    if (z == 0)
+    {
+        return 0.F;
+    }
+
+    auto div = std::max<>({static_cast<SizeType>(1), str1.size(), str2.size()});
+
+    return float(z) / float(div);
+}
+
+template <std::ranges::bidirectional_range T>
+float inMessages(const MessagePtr &msg, const T &messages)
+{
+    float similarityPercent = 0.0F;
+
+    for (const auto &prevMsg :
+         messages | std::views::reverse |
+             std::views::take(getSettings()->hideSimilarMaxMessagesToCheck))
+    {
+        if (prevMsg->parseTime.secsTo(QTime::currentTime()) >=
+            getSettings()->hideSimilarMaxDelay)
+        {
+            break;
+        }
+        if (getSettings()->hideSimilarBySameUser &&
+            msg->loginName != prevMsg->loginName)
+        {
+            continue;
+        }
+        similarityPercent = std::max(
+            similarityPercent,
+            relativeSimilarity(msg->messageText, prevMsg->messageText));
+    }
+
+    return similarityPercent;
+}
+
+}  // namespace
+
+namespace chatterino {
+
+template <std::ranges::bidirectional_range T>
+void setSimilarityFlags(const MessagePtr &message, const T &messages)
+{
+    if (getSettings()->similarityEnabled)
+    {
+        bool isMyself =
+            message->loginName ==
+            getApp()->getAccounts()->twitch.getCurrent()->getUserName();
+        bool hideMyself = getSettings()->hideSimilarMyself;
+
+        if (isMyself && !hideMyself)
+        {
+            return;
+        }
+
+        if (inMessages(message, messages) > getSettings()->similarityPercentage)
+        {
+            message->flags.set(MessageFlag::Similar);
+            if (getSettings()->colorSimilarDisabled)
+            {
+                message->flags.set(MessageFlag::Disabled);
+            }
+        }
+    }
+}
+
+template void setSimilarityFlags<std::vector<MessagePtr>>(
+    const MessagePtr &msg, const std::vector<MessagePtr> &messages);
+template void setSimilarityFlags<LimitedQueueSnapshot<MessagePtr>>(
+    const MessagePtr &msg, const LimitedQueueSnapshot<MessagePtr> &messages);
+
+}  // namespace chatterino

src/messages/MessageSimilarity.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "messages/Message.hpp"
+
+#include <ranges>
+namespace chatterino {
+
+template <std::ranges::bidirectional_range T>
+void setSimilarityFlags(const MessagePtr &message, const T &messages);
+
+}  // namespace chatterino

src/messages/MessageSink.hpp

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "common/enums/MessageContext.hpp"
+#include "common/FlagsEnum.hpp"
+#include "messages/MessageFlag.hpp"
+
+#include <memory>
+#include <optional>
+
+class QStringView;
+class QTime;
+
+namespace chatterino {
+
+struct Message;
+using MessagePtr = std::shared_ptr<const Message>;
+
+enum class MessageSinkTrait : uint8_t {
+    None = 0,
+
+    /// Messages with the `Highlighted` and `ShowInMentions` flags should be
+    /// added to the global mentions channel when encountered.
+    AddMentionsToGlobalChannel = 1 << 0,
+
+    /// A channel-point redemption whose reward is not yet known should not be
+    /// added to this sink, but queued in the corresponding TwitchChannel
+    /// (`addQueuedRedemption`).
+    RequiresKnownChannelPointReward = 1 << 1,
+};
+using MessageSinkTraits = FlagsEnum<MessageSinkTrait>;
+
+/// A generic interface for a managed buffer of `Message`s
+class MessageSink
+{
+public:
+    virtual ~MessageSink() = default;
+
+    /// Add a message to this sink
+    ///
+    /// @param message The message to add (non-null)
+    /// @param ctx The context in which this message is being added.
+    /// @param overridingFlags
+    virtual void addMessage(
+        MessagePtr message, MessageContext ctx,
+        std::optional<MessageFlags> overridingFlags = std::nullopt) = 0;
+
+    /// Adds a timeout message or merges it into an existing one
+    virtual void addOrReplaceTimeout(MessagePtr clearchatMessage,
+                                     QTime now) = 0;
+
+    /// Flags all messages as `Disabled`
+    virtual void disableAllMessages() = 0;
+
+    /// Searches for similar messages and flags this message as similar
+    /// (based on the current settings).
+    virtual void applySimilarityFilters(const MessagePtr &message) const = 0;
+
+    /// @brief Searches for a message by an ID
+    ///
+    /// If there is no message found, an empty shared-pointer is returned.
+    virtual MessagePtr findMessageByID(QStringView id) = 0;
+
+    /// Behaviour to be exercised when parsing/building messages for this sink.
+    virtual MessageSinkTraits sinkTraits() const = 0;
+};
+
+}  // namespace chatterino

src/providers/recentmessages/Impl.cpp

@@ -3,7 +3,9 @@
 #include "common/Env.hpp"
 #include "messages/MessageBuilder.hpp"
 #include "providers/twitch/IrcMessageHandler.hpp"
+#include "providers/twitch/TwitchChannel.hpp"
 #include "util/Helpers.hpp"
+#include "util/VectorMessageSink.hpp"
 
 #include <QJsonArray>
 #include <QUrlQuery>
@@ -40,7 +42,13 @@ std::vector<Communi::IrcMessage *> parseRecentMessages(
 std::vector<MessagePtr> buildRecentMessages(
     std::vector<Communi::IrcMessage *> &messages, Channel *channel)
 {
-    std::vector<MessagePtr> allBuiltMessages;
+    VectorMessageSink sink({}, MessageFlag::RecentMessage);
+
+    auto *twitchChannel = dynamic_cast<TwitchChannel *>(channel);
+    if (!twitchChannel)
+    {
+        return {};
+    }
 
     for (auto *message : messages)
     {
@@ -58,24 +66,16 @@ std::vector<MessagePtr> buildRecentMessages(
                 auto msg = makeSystemMessage(
                     QLocale().toString(msgDate, QLocale::LongFormat),
                     QTime(0, 0));
-                msg->flags.set(MessageFlag::RecentMessage);
+                sink.addMessage(msg, MessageContext::Original);
-                allBuiltMessages.emplace_back(msg);
             }
         }
 
-        auto builtMessages = IrcMessageHandler::parseMessageWithReply(
+        IrcMessageHandler::parseMessageInto(message, sink, twitchChannel);
-            channel, message, allBuiltMessages);
-
-        for (const auto &builtMessage : builtMessages)
-        {
-            builtMessage->flags.set(MessageFlag::RecentMessage);
-            allBuiltMessages.emplace_back(builtMessage);
-        }
 
         message->deleteLater();
     }
 
-    return allBuiltMessages;
+    return std::move(sink).takeMessages();
 }
 
 // Returns the URL to be used for querying the Recent Messages API for the

src/providers/twitch/IrcMessageHandler.hpp

@@ -16,6 +16,7 @@ struct Message;
 using MessagePtr = std::shared_ptr<const Message>;
 class TwitchChannel;
 class TwitchMessageBuilder;
+class MessageSink;
 
 struct ClearChatMessage {
     MessagePtr message;
@@ -33,30 +34,34 @@ public:
      * Parse an IRC message into 0 or more Chatterino messages
      * Takes previously loaded messages into consideration to add reply contexts
      **/
-    static std::vector<MessagePtr> parseMessageWithReply(
+    static void parseMessageInto(Communi::IrcMessage *message,
-        Channel *channel, Communi::IrcMessage *message,
+                                 MessageSink &sink, TwitchChannel *channel);
-        std::vector<MessagePtr> &otherLoaded);
 
     void handlePrivMessage(Communi::IrcPrivateMessage *message,
                            ITwitchIrcServer &twitchServer);
+    static void parsePrivMessageInto(Communi::IrcPrivateMessage *message,
+                                     MessageSink &sink, TwitchChannel *channel);
 
     void handleRoomStateMessage(Communi::IrcMessage *message);
     void handleClearChatMessage(Communi::IrcMessage *message);
     void handleClearMessageMessage(Communi::IrcMessage *message);
     void handleUserStateMessage(Communi::IrcMessage *message);
-    void handleWhisperMessage(Communi::IrcMessage *ircMessage);
 
+    void handleWhisperMessage(Communi::IrcMessage *ircMessage);
     void handleUserNoticeMessage(Communi::IrcMessage *message,
                                  ITwitchIrcServer &twitchServer);
+    static void parseUserNoticeMessageInto(Communi::IrcMessage *message,
+                                           MessageSink &sink,
+                                           TwitchChannel *channel);
 
     void handleNoticeMessage(Communi::IrcNoticeMessage *message);
 
     void handleJoinMessage(Communi::IrcMessage *message);
     void handlePartMessage(Communi::IrcMessage *message);
 
-    void addMessage(Communi::IrcMessage *message, const ChannelPtr &chan,
+    static void addMessage(Communi::IrcMessage *message, MessageSink &sink,
-                    const QString &originalContent, ITwitchIrcServer &server,
+                           TwitchChannel *chan, const QString &originalContent,
-                    bool isSub, bool isAction);
+                           ITwitchIrcServer &twitch, bool isSub, bool isAction);
 
 private:
     static float similarity(const MessagePtr &msg,

src/providers/twitch/TwitchChannel.cpp

@@ -452,8 +452,8 @@ void TwitchChannel::addChannelPointReward(const ChannelPointReward &reward)
                 if (reward.id == msg.rewardID)
                 {
                     IrcMessageHandler::instance().addMessage(
-                        msg.message.get(), shared_from_this(),
+                        msg.message.get(), *this, this, msg.originalContent,
-                        msg.originalContent, *server, false, false);
+                        *server, false, false);
                     return true;
                 }
                 return false;
@@ -1356,8 +1356,6 @@ void TwitchChannel::loadRecentMessages()
                 {
                     msgs.push_back(msg);
                 }
-
-                tc->addRecentChatter(msg->displayName);
             }
 
             getApp()->getTwitch()->getMentionsChannel()->fillInMissingMessages(

src/providers/twitch/TwitchIrcServer.cpp

@@ -312,7 +312,7 @@ void TwitchIrcServer::initialize()
             postToThread([chan, action] {
                 MessageBuilder msg(action);
                 msg->flags.set(MessageFlag::PubSub);
-                chan->addOrReplaceTimeout(msg.release());
+                chan->addOrReplaceTimeout(msg.release(), QTime::currentTime());
             });
         });
 

src/util/VectorMessageSink.cpp

@@ -0,0 +1,86 @@
+#include "util/VectorMessageSink.hpp"
+
+#include "messages/MessageSimilarity.hpp"
+#include "util/ChannelHelpers.hpp"
+
+#include <cassert>
+
+namespace chatterino {
+
+VectorMessageSink::VectorMessageSink(MessageSinkTraits traits,
+                                     MessageFlags additionalFlags)
+    : additionalFlags(additionalFlags)
+    , traits(traits){};
+VectorMessageSink::~VectorMessageSink() = default;
+
+void VectorMessageSink::addMessage(MessagePtr message, MessageContext ctx,
+                                   std::optional<MessageFlags> overridingFlags)
+{
+    assert(!overridingFlags.has_value());
+    assert(ctx == MessageContext::Original);
+
+    message->flags.set(this->additionalFlags);
+    this->messages_.emplace_back(std::move(message));
+}
+
+void VectorMessageSink::addOrReplaceTimeout(MessagePtr clearchatMessage,
+                                            QTime now)
+{
+    addOrReplaceChannelTimeout(
+        this->messages_, std::move(clearchatMessage), now,
+        [&](auto idx, auto /*msg*/, auto &&replacement) {
+            replacement->flags.set(this->additionalFlags);
+            this->messages_[idx] = replacement;
+        },
+        [&](auto &&msg) {
+            this->messages_.emplace_back(msg);
+        },
+        false);
+}
+
+void VectorMessageSink::disableAllMessages()
+{
+    if (this->additionalFlags.has(MessageFlag::RecentMessage))
+    {
+        return;  // don't disable recent messages
+    }
+
+    for (const auto &msg : this->messages_)
+    {
+        msg->flags.set(MessageFlag::Disabled);
+    }
+}
+
+void VectorMessageSink::applySimilarityFilters(const MessagePtr &message) const
+{
+    setSimilarityFlags(message, this->messages_);
+}
+
+MessagePtr VectorMessageSink::findMessageByID(QStringView id)
+{
+    for (const auto &msg : this->messages_ | std::views::reverse)
+    {
+        if (msg->id == id)
+        {
+            return msg;
+        }
+    }
+    return {};
+}
+
+const std::vector<MessagePtr> &VectorMessageSink::messages() const
+{
+    return this->messages_;
+}
+
+std::vector<MessagePtr> VectorMessageSink::takeMessages() &&
+{
+    return std::move(this->messages_);
+}
+
+MessageSinkTraits VectorMessageSink::sinkTraits() const
+{
+    return this->traits;
+}
+
+}  // namespace chatterino

src/util/VectorMessageSink.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "messages/MessageSink.hpp"
+
+namespace chatterino {
+
+class VectorMessageSink final : public MessageSink
+{
+public:
+    VectorMessageSink(MessageSinkTraits traits = {},
+                      MessageFlags additionalFlags = {});
+    ~VectorMessageSink() override;
+
+    void addMessage(
+        MessagePtr message, MessageContext ctx,
+        std::optional<MessageFlags> overridingFlags = std::nullopt) override;
+    void addOrReplaceTimeout(MessagePtr clearchatMessage, QTime now) override;
+
+    void disableAllMessages() override;
+
+    void applySimilarityFilters(const MessagePtr &message) const override;
+
+    MessagePtr findMessageByID(QStringView id) override;
+
+    MessageSinkTraits sinkTraits() const override;
+
+    const std::vector<MessagePtr> &messages() const;
+    std::vector<MessagePtr> takeMessages() &&;
+
+private:
+    std::vector<MessagePtr> messages_;
+    MessageFlags additionalFlags;
+    MessageSinkTraits traits;
+};
+
+}  // namespace chatterino

src/widgets/Notebook.cpp

@@ -204,7 +204,7 @@ void Notebook::duplicatePage(QWidget *page)
     {
         newTabPosition = tabPosition + 1;
     }
-    auto newTabHighlightState = item->tab->highlightState();
+
     QString newTabTitle = "";
     if (item->tab->hasCustomTitle())
     {
@@ -213,7 +213,7 @@ void Notebook::duplicatePage(QWidget *page)
 
     auto *tab =
         this->addPageAt(newContainer, newTabPosition, newTabTitle, false);
-    tab->setHighlightState(newTabHighlightState);
+    tab->copyHighlightStateAndSourcesFrom(item->tab);
 
     newContainer->setTab(tab);
 }

src/widgets/helper/ChannelView.cpp

@@ -967,10 +967,10 @@ void ChannelView::setChannel(const ChannelPtr &underlyingChannel)
 
     this->channelConnections_.managedConnect(
         underlyingChannel->messageReplaced,
-        [this](auto index, const auto &replacement) {
+        [this](auto index, const auto &prev, const auto &replacement) {
             if (this->shouldIncludeMessage(replacement))
             {
-                this->channel_->replaceMessage(index, replacement);
+                this->channel_->replaceMessage(index, prev, replacement);
             }
         });
 
@@ -1051,8 +1051,9 @@ void ChannelView::setChannel(const ChannelPtr &underlyingChannel)
     // on message replaced
     this->channelConnections_.managedConnect(
         this->channel_->messageReplaced,
-        [this](size_t index, MessagePtr replacement) {
+        [this](size_t index, const MessagePtr &prev,
-            this->messageReplaced(index, replacement);
+               const MessagePtr &replacement) {
+            this->messageReplaced(index, prev, replacement);
         });
 
     // on messages filled in
@@ -1063,6 +1064,8 @@ void ChannelView::setChannel(const ChannelPtr &underlyingChannel)
 
     this->underlyingChannel_ = underlyingChannel;
 
+    this->updateID();
+
     this->performLayout();
     this->queueUpdate();
 
@@ -1081,6 +1084,8 @@ void ChannelView::setChannel(const ChannelPtr &underlyingChannel)
 void ChannelView::setFilters(const QList<QUuid> &ids)
 {
     this->channelFilters_ = std::make_shared<FilterSet>(ids);
+
+    this->updateID();
 }
 
 QList<QUuid> ChannelView::getFilterIds() const
@@ -1258,19 +1263,21 @@ void ChannelView::messageAddedAtStart(std::vector<MessagePtr> &messages)
     this->queueLayout();
 }
 
-void ChannelView::messageReplaced(size_t index, MessagePtr &replacement)
+void ChannelView::messageReplaced(size_t hint, const MessagePtr &prev,
+                                  const MessagePtr &replacement)
 {
-    auto oMessage = this->messages_.get(index);
+    auto optItem = this->messages_.find(hint, [&](const auto &it) {
-    if (!oMessage)
+        return it->getMessagePtr() == prev;
+    });
+    if (!optItem)
     {
         return;
     }
-
+    const auto &[index, oldItem] = *optItem;
-    auto message = *oMessage;
 
     auto newItem = std::make_shared<MessageLayout>(replacement);
 
-    if (message->flags.has(MessageLayoutFlag::AlternateBackground))
+    if (oldItem->flags.has(MessageLayoutFlag::AlternateBackground))
     {
         newItem->flags.set(MessageLayoutFlag::AlternateBackground);
     }
@@ -1278,7 +1285,7 @@ void ChannelView::messageReplaced(size_t index, MessagePtr &replacement)
     this->scrollBar_->replaceHighlight(index,
                                        replacement->getScrollBarHighlight());
 
-    this->messages_.replaceItem(message, newItem);
+    this->messages_.replaceItem(index, newItem);
     this->queueLayout();
 }
 
@@ -3240,4 +3247,27 @@ void ChannelView::pendingLinkInfoStateChanged()
     this->tooltipWidget_->applyLastBoundsCheck();
 }
 
+void ChannelView::updateID()
+{
+    if (!this->underlyingChannel_)
+    {
+        // cannot update
+        return;
+    }
+
+    std::size_t seed = 0;
+    auto first = qHash(this->underlyingChannel_->getName());
+    auto second = qHash(this->getFilterIds());
+
+    boost::hash_combine(seed, first);
+    boost::hash_combine(seed, second);
+
+    this->id_ = seed;
+}
+
+ChannelView::ChannelViewID ChannelView::getID() const
+{
+    return this->id_;
+}
+
 }  // namespace chatterino

src/widgets/helper/ChannelView.hpp

@@ -212,6 +212,14 @@ public:
 
     Scrollbar *scrollbar();
 
+    using ChannelViewID = std::size_t;
+    ///
+    /// \brief Get the ID of this ChannelView
+    ///
+    /// The ID is made of the underlying channel's name
+    /// combined with the filter set IDs
+    ChannelViewID getID() const;
+
     pajlada::Signals::Signal<QMouseEvent *> mouseDown;
     pajlada::Signals::NoArgSignal selectionChanged;
     pajlada::Signals::Signal<HighlightState> tabHighlightRequested;
@@ -268,7 +276,8 @@ private:
                          std::optional<MessageFlags> overridingFlags);
     void messageAddedAtStart(std::vector<MessagePtr> &messages);
     void messageRemoveFromStart(MessagePtr &message);
-    void messageReplaced(size_t index, MessagePtr &replacement);
+    void messageReplaced(size_t hint, const MessagePtr &prev,
+                         const MessagePtr &replacement);
     void messagesUpdated();
 
     void performLayout(bool causedByScrollbar = false,
@@ -314,6 +323,9 @@ private:
     void showReplyThreadPopup(const MessagePtr &message);
     bool canReplyToMessages() const;
 
+    void updateID();
+    ChannelViewID id_{};
+
     bool layoutQueued_ = false;
     bool bufferInvalidationQueued_ = false;
 
@@ -375,7 +387,7 @@ private:
     FilterSetPtr channelFilters_;
 
     // Returns true if message should be included
-    bool shouldIncludeMessage(const MessagePtr &m) const;
+    bool shouldIncludeMessage(const MessagePtr &message) const;
 
     // Returns whether the scrollbar should have highlights
     bool showScrollbarHighlights() const;

src/widgets/helper/NotebookTab.cpp

@@ -1,6 +1,7 @@
 #include "widgets/helper/NotebookTab.hpp"
 
 #include "Application.hpp"
+#include "common/Channel.hpp"
 #include "common/Common.hpp"
 #include "controllers/hotkeys/HotkeyCategory.hpp"
 #include "controllers/hotkeys/HotkeyController.hpp"
@@ -12,9 +13,11 @@
 #include "widgets/dialogs/SettingsDialog.hpp"
 #include "widgets/Notebook.hpp"
 #include "widgets/splits/DraggedSplit.hpp"
+#include "widgets/splits/Split.hpp"
 #include "widgets/splits/SplitContainer.hpp"
 
 #include <boost/bind/bind.hpp>
+#include <boost/container_hash/hash.hpp>
 #include <QAbstractAnimation>
 #include <QApplication>
 #include <QDebug>
@@ -302,10 +305,134 @@ bool NotebookTab::isSelected() const
     return this->selected_;
 }
 
+void NotebookTab::removeHighlightStateChangeSources(
+    const HighlightSources &toRemove)
+{
+    for (const auto &[source, _] : toRemove)
+    {
+        this->removeHighlightSource(source);
+    }
+}
+
+void NotebookTab::removeHighlightSource(
+    const ChannelView::ChannelViewID &source)
+{
+    this->highlightSources_.erase(source);
+}
+
+void NotebookTab::newHighlightSourceAdded(const ChannelView &channelViewSource)
+{
+    auto channelViewId = channelViewSource.getID();
+    this->removeHighlightSource(channelViewId);
+    this->updateHighlightStateDueSourcesChange();
+
+    auto *splitNotebook = dynamic_cast<SplitNotebook *>(this->notebook_);
+    if (splitNotebook)
+    {
+        for (int i = 0; i < splitNotebook->getPageCount(); ++i)
+        {
+            auto *splitContainer =
+                dynamic_cast<SplitContainer *>(splitNotebook->getPageAt(i));
+            if (splitContainer)
+            {
+                auto *tab = splitContainer->getTab();
+                if (tab && tab != this)
+                {
+                    tab->removeHighlightSource(channelViewId);
+                    tab->updateHighlightStateDueSourcesChange();
+                }
+            }
+        }
+    }
+}
+
+void NotebookTab::updateHighlightStateDueSourcesChange()
+{
+    if (std::ranges::any_of(this->highlightSources_, [](const auto &keyval) {
+            return keyval.second == HighlightState::Highlighted;
+        }))
+    {
+        assert(this->highlightState_ == HighlightState::Highlighted);
+        return;
+    }
+
+    if (std::ranges::any_of(this->highlightSources_, [](const auto &keyval) {
+            return keyval.second == HighlightState::NewMessage;
+        }))
+    {
+        if (this->highlightState_ != HighlightState::NewMessage)
+        {
+            this->highlightState_ = HighlightState::NewMessage;
+            this->update();
+        }
+    }
+    else
+    {
+        if (this->highlightState_ != HighlightState::None)
+        {
+            this->highlightState_ = HighlightState::None;
+            this->update();
+        }
+    }
+
+    assert(this->highlightState_ != HighlightState::Highlighted);
+}
+
+void NotebookTab::copyHighlightStateAndSourcesFrom(const NotebookTab *sourceTab)
+{
+    if (this->isSelected())
+    {
+        assert(this->highlightSources_.empty());
+        assert(this->highlightState_ == HighlightState::None);
+        return;
+    }
+
+    this->highlightSources_ = sourceTab->highlightSources_;
+
+    if (!this->highlightEnabled_ &&
+        sourceTab->highlightState_ == HighlightState::NewMessage)
+    {
+        return;
+    }
+
+    if (this->highlightState_ == sourceTab->highlightState_ ||
+        this->highlightState_ == HighlightState::Highlighted)
+    {
+        return;
+    }
+
+    this->highlightState_ = sourceTab->highlightState_;
+    this->update();
+}
+
 void NotebookTab::setSelected(bool value)
 {
     this->selected_ = value;
 
+    if (value)
+    {
+        auto *splitNotebook = dynamic_cast<SplitNotebook *>(this->notebook_);
+        if (splitNotebook)
+        {
+            for (int i = 0; i < splitNotebook->getPageCount(); ++i)
+            {
+                auto *splitContainer =
+                    dynamic_cast<SplitContainer *>(splitNotebook->getPageAt(i));
+                if (splitContainer)
+                {
+                    auto *tab = splitContainer->getTab();
+                    if (tab && tab != this)
+                    {
+                        tab->removeHighlightStateChangeSources(
+                            this->highlightSources_);
+                        tab->updateHighlightStateDueSourcesChange();
+                    }
+                }
+            }
+        }
+    }
+
+    this->highlightSources_.clear();
     this->highlightState_ = HighlightState::None;
 
     this->update();
@@ -358,13 +485,22 @@ bool NotebookTab::isLive() const
     return this->isLive_;
 }
 
+HighlightState NotebookTab::highlightState() const
+{
+    return this->highlightState_;
+}
+
 void NotebookTab::setHighlightState(HighlightState newHighlightStyle)
 {
     if (this->isSelected())
     {
+        assert(this->highlightSources_.empty());
+        assert(this->highlightState_ == HighlightState::None);
         return;
     }
 
+    this->highlightSources_.clear();
+
     if (!this->highlightEnabled_ &&
         newHighlightStyle == HighlightState::NewMessage)
     {
@@ -381,9 +517,79 @@ void NotebookTab::setHighlightState(HighlightState newHighlightStyle)
     this->update();
 }
 
-HighlightState NotebookTab::highlightState() const
+void NotebookTab::updateHighlightState(HighlightState newHighlightStyle,
+                                       const ChannelView &channelViewSource)
 {
-    return this->highlightState_;
+    if (this->isSelected())
+    {
+        assert(this->highlightSources_.empty());
+        assert(this->highlightState_ == HighlightState::None);
+        return;
+    }
+
+    if (!this->shouldMessageHighlight(channelViewSource))
+    {
+        return;
+    }
+
+    if (!this->highlightEnabled_ &&
+        newHighlightStyle == HighlightState::NewMessage)
+    {
+        return;
+    }
+
+    // message is highlighting unvisible tab
+
+    auto channelViewId = channelViewSource.getID();
+
+    switch (newHighlightStyle)
+    {
+        case HighlightState::Highlighted:
+            // override lower states
+            this->highlightSources_.insert_or_assign(channelViewId,
+                                                     newHighlightStyle);
+        case HighlightState::NewMessage: {
+            // only insert if no state already there to avoid overriding
+            if (!this->highlightSources_.contains(channelViewId))
+            {
+                this->highlightSources_.emplace(channelViewId,
+                                                newHighlightStyle);
+            }
+            break;
+        }
+        case HighlightState::None:
+            break;
+    }
+
+    if (this->highlightState_ == newHighlightStyle ||
+        this->highlightState_ == HighlightState::Highlighted)
+    {
+        return;
+    }
+
+    this->highlightState_ = newHighlightStyle;
+    this->update();
+}
+
+bool NotebookTab::shouldMessageHighlight(
+    const ChannelView &channelViewSource) const
+{
+    auto *visibleSplitContainer =
+        dynamic_cast<SplitContainer *>(this->notebook_->getSelectedPage());
+    if (visibleSplitContainer != nullptr)
+    {
+        const auto &visibleSplits = visibleSplitContainer->getSplits();
+        for (const auto &visibleSplit : visibleSplits)
+        {
+            if (channelViewSource.getID() ==
+                visibleSplit->getChannelView().getID())
+            {
+                return false;
+            }
+        }
+    }
+
+    return true;
 }
 
 void NotebookTab::setHighlightsEnabled(const bool &newVal)

src/widgets/helper/NotebookTab.hpp

@@ -2,6 +2,7 @@
 
 #include "common/Common.hpp"
 #include "widgets/helper/Button.hpp"
+#include "widgets/helper/ChannelView.hpp"
 #include "widgets/Notebook.hpp"
 
 #include <pajlada/settings/setting.hpp>
@@ -59,11 +60,24 @@ public:
      **/
     bool isLive() const;
 
+    /**
+     * @brief Sets the highlight state of this tab clearing highlight sources
+     *
+     * Obeys the HighlightsEnabled setting and highlight states hierarchy
+     */
     void setHighlightState(HighlightState style);
-    HighlightState highlightState() const;
+    /**
-
+     * @brief Updates the highlight state and highlight sources of this tab
+     *
+     * Obeys the HighlightsEnabled setting and the highlight state hierarchy and tracks the highlight state update sources
+     */
+    void updateHighlightState(HighlightState style,
+                              const ChannelView &channelViewSource);
+    void copyHighlightStateAndSourcesFrom(const NotebookTab *sourceTab);
     void setHighlightsEnabled(const bool &newVal);
+    void newHighlightSourceAdded(const ChannelView &channelViewSource);
     bool hasHighlightsEnabled() const;
+    HighlightState highlightState() const;
 
     void moveAnimated(QPoint targetPos, bool animated = true);
 
@@ -107,6 +121,16 @@ private:
 
     int normalTabWidthForHeight(int height) const;
 
+    bool shouldMessageHighlight(const ChannelView &channelViewSource) const;
+
+    using HighlightSources =
+        std::unordered_map<ChannelView::ChannelViewID, HighlightState>;
+    HighlightSources highlightSources_;
+
+    void removeHighlightStateChangeSources(const HighlightSources &toRemove);
+    void removeHighlightSource(const ChannelView::ChannelViewID &source);
+    void updateHighlightStateDueSourcesChange();
+
     QPropertyAnimation positionChangedAnimation_;
     QPoint positionAnimationDesiredPoint_;
 

src/widgets/splits/SplitContainer.cpp

@@ -214,13 +214,21 @@ void SplitContainer::addSplit(Split *split)
     auto &&conns = this->connectionsPerSplit_[split];
 
     conns.managedConnect(split->getChannelView().tabHighlightRequested,
-                         [this](HighlightState state) {
+                         [this, split](HighlightState state) {
                              if (this->tab_ != nullptr)
                              {
-                                 this->tab_->setHighlightState(state);
+                                 this->tab_->updateHighlightState(
+                                     state, split->getChannelView());
                              }
                          });
 
+    conns.managedConnect(split->channelChanged, [this, split] {
+        if (this->tab_ != nullptr)
+        {
+            this->tab_->newHighlightSourceAdded(split->getChannelView());
+        }
+    });
+
     conns.managedConnect(split->getChannelView().liveStatusChanged, [this]() {
         this->refreshTabLiveStatus();
     });

tests/snapshots/IrcMessageHandler/announcement.json

@@ -180,6 +180,7 @@
                 }
             ],
             "flags": "Collapsed|Subscription",
+            "highlightColor": "#64c466ff",
             "id": "8c26e1ab-b50c-4d9d-bc11-3fd57a941d90",
             "localizedName": "",
             "loginName": "supinic",

tests/snapshots/IrcMessageHandler/reply-child.json

@@ -80,7 +80,7 @@
                     "trailingSpace": true,
                     "type": "SingleLineTextElement",
                     "words": [
-                        "a"
+                        "b"
                     ]
                 },
                 {
@@ -169,6 +169,7 @@
             "localizedName": "",
             "loginName": "nerixyz",
             "messageText": "c",
+            "replyParent": "474f19ab-a1b0-410a-877a-5b0e2ae8be6d",
             "replyThread": {
                 "replies": [
                     "474f19ab-a1b0-410a-877a-5b0e2ae8be6d",

tests/snapshots/IrcMessageHandler/shared-chat-announcement.json

@@ -256,6 +256,7 @@
                 }
             ],
             "flags": "Collapsed|Subscription|SharedMessage",
+            "highlightColor": "#64c466ff",
             "id": "01cd601f-bc3f-49d5-ab4b-136fa9d6ec22",
             "localizedName": "",
             "loginName": "lahoooo",

tests/snapshots/IrcMessageHandler/sub-message.json

@@ -243,6 +243,7 @@
                 }
             ],
             "flags": "Collapsed|Subscription",
+            "highlightColor": "#64c466ff",
             "id": "db25007f-7a18-43eb-9379-80131e44d633",
             "localizedName": "",
             "loginName": "ronni",

tests/src/IrcMessageHandler.cpp

@@ -27,6 +27,7 @@
 #include "singletons/Emotes.hpp"
 #include "Test.hpp"
 #include "util/IrcHelpers.hpp"
+#include "util/VectorMessageSink.hpp"
 
 #include <IrcConnection>
 #include <QDebug>
@@ -572,19 +573,14 @@ TEST_P(TestIrcMessageHandlerP, Run)
 {
     auto channel = makeMockTwitchChannel(u"pajlada"_s, *snapshot);
 
-    std::vector<MessagePtr> prevMessages;
+    VectorMessageSink sink;
 
     for (auto prevInput : snapshot->param("prevMessages").toArray())
     {
         auto *ircMessage = Communi::IrcMessage::fromData(
             prevInput.toString().toUtf8(), nullptr);
         ASSERT_NE(ircMessage, nullptr);
-        auto builtMessages = IrcMessageHandler::parseMessageWithReply(
+        IrcMessageHandler::parseMessageInto(ircMessage, sink, channel.get());
-            channel.get(), ircMessage, prevMessages);
-        for (const auto &builtMessage : builtMessages)
-        {
-            prevMessages.emplace_back(builtMessage);
-        }
         delete ircMessage;
     }
 
@@ -592,13 +588,13 @@ TEST_P(TestIrcMessageHandlerP, Run)
         Communi::IrcMessage::fromData(snapshot->inputUtf8(), nullptr);
     ASSERT_NE(ircMessage, nullptr);
 
-    auto builtMessages = IrcMessageHandler::parseMessageWithReply(
+    auto firstAddedMsg = sink.messages().size();
-        channel.get(), ircMessage, prevMessages);
+    IrcMessageHandler::parseMessageInto(ircMessage, sink, channel.get());
 
     QJsonArray got;
-    for (const auto &msg : builtMessages)
+    for (auto i = firstAddedMsg; i < sink.messages().size(); i++)
     {
-        got.append(msg->toJson());
+        got.append(sink.messages()[i]->toJson());
     }
 
     delete ircMessage;

tests/src/LimitedQueue.cpp

@@ -114,20 +114,153 @@ TEST(LimitedQueue, PushFront)
 
 TEST(LimitedQueue, ReplaceItem)
 {
-    LimitedQueue<int> queue(5);
+    LimitedQueue<int> queue(10);
     queue.pushBack(1);
     queue.pushBack(2);
     queue.pushBack(3);
+    queue.pushBack(4);
+    queue.pushBack(5);
+    queue.pushBack(6);
 
     int idex = queue.replaceItem(2, 10);
     EXPECT_EQ(idex, 1);
-    idex = queue.replaceItem(5, 11);
+    idex = queue.replaceItem(7, 11);
     EXPECT_EQ(idex, -1);
 
-    bool res = queue.replaceItem(std::size_t(0), 9);
+    int prev = -1;
+    bool res = queue.replaceItem(std::size_t(0), 9, &prev);
     EXPECT_TRUE(res);
-    res = queue.replaceItem(std::size_t(5), 4);
+    EXPECT_EQ(prev, 1);
+    res = queue.replaceItem(std::size_t(6), 4);
     EXPECT_FALSE(res);
 
-    SNAPSHOT_EQUALS(queue.getSnapshot(), {9, 10, 3}, "first snapshot");
+    // correct hint
+    EXPECT_EQ(queue.replaceItem(3, 4, 11), 3);
+    // incorrect hints
+    EXPECT_EQ(queue.replaceItem(5, 11, 12), 3);
+    EXPECT_EQ(queue.replaceItem(0, 12, 13), 3);
+    // oob hint
+    EXPECT_EQ(queue.replaceItem(42, 13, 14), 3);
+    // bad needle
+    EXPECT_EQ(queue.replaceItem(0, 15, 16), -1);
+
+    SNAPSHOT_EQUALS(queue.getSnapshot(), {9, 10, 3, 14, 5, 6},
+                    "first snapshot");
+}
+
+TEST(LimitedQueue, Find)
+{
+    LimitedQueue<int> queue(10);
+    queue.pushBack(1);
+    queue.pushBack(2);
+    queue.pushBack(3);
+    queue.pushBack(4);
+    queue.pushBack(5);
+    queue.pushBack(6);
+
+    // without hint
+    EXPECT_FALSE(queue
+                     .find([](int i) {
+                         return i == 0;
+                     })
+                     .has_value());
+    EXPECT_EQ(queue
+                  .find([](int i) {
+                      return i == 1;
+                  })
+                  .value(),
+              1);
+    EXPECT_EQ(queue
+                  .find([](int i) {
+                      return i == 2;
+                  })
+                  .value(),
+              2);
+    EXPECT_EQ(queue
+                  .find([](int i) {
+                      return i == 6;
+                  })
+                  .value(),
+              6);
+    EXPECT_FALSE(queue
+                     .find([](int i) {
+                         return i == 7;
+                     })
+                     .has_value());
+    EXPECT_FALSE(queue
+                     .find([](int i) {
+                         return i > 6;
+                     })
+                     .has_value());
+    EXPECT_FALSE(queue
+                     .find([](int i) {
+                         return i <= 0;
+                     })
+                     .has_value());
+
+    using Pair = std::pair<size_t, int>;
+    // with hint
+    EXPECT_FALSE(queue
+                     .find(0,
+                           [](int i) {
+                               return i == 0;
+                           })
+                     .has_value());
+    // correct hint
+    EXPECT_EQ(queue
+                  .find(0,
+                        [](int i) {
+                            return i == 1;
+                        })
+                  .value(),
+              (Pair{0, 1}));
+    EXPECT_EQ(queue
+                  .find(1,
+                        [](int i) {
+                            return i == 2;
+                        })
+                  .value(),
+              (Pair{1, 2}));
+    // incorrect hint
+    EXPECT_EQ(queue
+                  .find(1,
+                        [](int i) {
+                            return i == 1;
+                        })
+                  .value(),
+              (Pair{0, 1}));
+    EXPECT_EQ(queue
+                  .find(5,
+                        [](int i) {
+                            return i == 6;
+                        })
+                  .value(),
+              (Pair{5, 6}));
+    // oob hint
+    EXPECT_EQ(queue
+                  .find(6,
+                        [](int i) {
+                            return i == 3;
+                        })
+                  .value(),
+              (Pair{2, 3}));
+    // non-existent items
+    EXPECT_FALSE(queue
+                     .find(42,
+                           [](int i) {
+                               return i == 7;
+                           })
+                     .has_value());
+    EXPECT_FALSE(queue
+                     .find(0,
+                           [](int i) {
+                               return i > 6;
+                           })
+                     .has_value());
+    EXPECT_FALSE(queue
+                     .find(0,
+                           [](int i) {
+                               return i <= 0;
+                           })
+                     .has_value());
 }