refactor: Turn link-info into its own element and class (#5178)

src/messages/layouts/MessageLayoutElement.cpp

@@ -77,9 +77,9 @@ MessageLayoutElement *MessageLayoutElement::setTrailingSpace(bool value)
     return this;
 }
 
-MessageLayoutElement *MessageLayoutElement::setLink(const Link &_link)
+MessageLayoutElement *MessageLayoutElement::setLink(const Link &link)
 {
-    this->link_ = _link;
+    this->link_ = link;
     return this;
 }
 
@@ -89,9 +89,13 @@ MessageLayoutElement *MessageLayoutElement::setText(const QString &_text)
     return this;
 }
 
-const Link &MessageLayoutElement::getLink() const
+Link MessageLayoutElement::getLink() const
 {
-    return this->link_;
+    if (this->link_)
+    {
+        return *this->link_;
+    }
+    return this->creator_.getLink();
 }
 
 const QString &MessageLayoutElement::getText() const
@@ -406,14 +410,6 @@ TextLayoutElement::TextLayoutElement(MessageElement &_creator, QString &_text,
     this->setText(_text);
 }
 
-void TextLayoutElement::listenToLinkChanges()
-{
-    this->managedConnections_.managedConnect(
-        static_cast<TextElement &>(this->getCreator()).linkChanged, [this]() {
-            this->setLink(this->getCreator().getLink());
-        });
-}
-
 void TextLayoutElement::addCopyTextToString(QString &str, uint32_t from,
                                             uint32_t to) const
 {

src/messages/layouts/MessageLayoutElement.hpp

@@ -44,7 +44,12 @@ public:
     void setLine(size_t line);
 
     MessageLayoutElement *setTrailingSpace(bool value);
-    MessageLayoutElement *setLink(const Link &link_);
+
+    /// @brief Overwrites the link for this layout element
+    ///
+    /// @sa #getLink()
+    MessageLayoutElement *setLink(const Link &link);
+
     MessageLayoutElement *setText(const QString &text_);
 
     virtual void addCopyTextToString(QString &str, uint32_t from = 0,
@@ -57,7 +62,12 @@ public:
     virtual int getMouseOverIndex(const QPoint &abs) const = 0;
     virtual int getXFromIndex(size_t index) = 0;
 
-    const Link &getLink() const;
+    /// @brief Returns the link this layout element has
+    ///
+    /// If there isn't any, an empty link is returned (type: None).
+    /// The link is sourced from the creator, but can be overwritten with
+    /// #setLink().
+    Link getLink() const;
     const QString &getText() const;
     FlagsEnum<MessageElementFlag> getFlags() const;
 
@@ -67,7 +77,7 @@ protected:
 private:
     QString text_;
     QRect rect_;
-    Link link_;
+    std::optional<Link> link_;
     MessageElement &creator_;
     /**
      * The line of the container this element is laid out at