feat(UI): Add 'Copy link' context menu item

Fixes #927

src/chatlog/chatlog.cpp

@@ -558,6 +558,16 @@ ChatLine::Ptr ChatLog::getLatestLine() const
     return nullptr;
 }
 
+/**
+ * @brief Finds the chat line object at a position on screen
+ * @param pos Position on screen in global coordinates
+ * @sa getContentFromPos()
+ */
+ChatLineContent *ChatLog::getContentFromGlobalPos(QPoint pos) const
+{
+    return getContentFromPos(mapToScene(mapFromGlobal(pos)));
+}
+
 void ChatLog::clear()
 {
     clearSelection();

src/chatlog/chatlog.h

@@ -61,6 +61,7 @@ public:
     ChatLine::Ptr getTypingNotification() const;
     QVector<ChatLine::Ptr> getLines();
     ChatLine::Ptr getLatestLine() const;
+    ChatLineContent* getContentFromGlobalPos(QPoint pos) const;
     const uint repNameAfter = 5*60;
 
 signals:

src/chatlog/content/text.cpp

@@ -231,6 +231,18 @@ QString Text::getText() const
     return rawText;
 }
 
+/**
+ * @brief Extracts the target of a link from the text at a given coordinate
+ * @param scenePos Position in scene coordinates
+ * @return The link target URL, or an empty string if there is no link there
+ */
+QString Text::getLinkAt(QPointF scenePos) const
+{
+    QTextCursor cursor(doc);
+    cursor.setPosition(cursorFromPos(scenePos));
+    return cursor.charFormat().anchorHref();
+}
+
 void Text::regenerate()
 {
     if (!doc)

src/chatlog/content/text.h

@@ -28,6 +28,8 @@ class QTextDocument;
 
 class Text : public ChatLineContent
 {
+    Q_OBJECT
+
 public:
     Text(const QString& txt = "", const QFont& font = QFont(), bool enableElide = false, const QString& rawText = QString(), const QColor c = Qt::black);
     virtual ~Text();
@@ -55,6 +57,7 @@ public:
     void hoverMoveEvent(QGraphicsSceneHoverEvent* event) final override;
 
     virtual QString getText() const final;
+    QString getLinkAt(QPointF scenePos) const;
 
 protected:
     // dynamic resource management

src/widget/form/genericchatform.cpp

@@ -26,6 +26,7 @@
 #include <QPushButton>
 #include <QShortcut>
 #include <QSplitter>
+#include <QClipboard>
 
 #include "chatlog/chatlog.h"
 #include "chatlog/content/timestamp.h"
@@ -198,6 +199,9 @@ GenericChatForm::GenericChatForm(QWidget *parent)
     quoteAction = menu.addAction(QIcon(),
                                  QString(), this, SLOT(quoteSelectedText()));
 
+    copyLinkAction = menu.addAction(QIcon(),
+                                    QString(), this, SLOT(copyLink()));
+
     menu.addSeparator();
 
     connect(emoteButton, &QPushButton::clicked,
@@ -313,6 +317,21 @@ void GenericChatForm::onChatContextMenuRequested(QPoint pos)
     QWidget* sender = static_cast<QWidget*>(QObject::sender());
     pos = sender->mapToGlobal(pos);
 
+    // If we right-clicked on a link, give the option to copy it
+    bool clickedOnLink = false;
+    Text* clickedText = qobject_cast<Text*>(chatWidget->getContentFromGlobalPos(pos));
+    if (clickedText)
+    {
+        QPointF scenePos = chatWidget->mapToScene(chatWidget->mapFromGlobal(pos));
+        QString linkTarget = clickedText->getLinkAt(scenePos);
+        if (!linkTarget.isEmpty())
+        {
+            clickedOnLink = true;
+            copyLinkAction->setData(linkTarget);
+        }
+    }
+    copyLinkAction->setVisible(clickedOnLink);
+
     menu.exec(pos);
 }
 
@@ -598,6 +617,15 @@ void GenericChatForm::quoteSelectedText()
     msgEdit->append(quote);
 }
 
+/**
+ * @brief Callback of GenericChatForm::copyLinkAction
+ */
+void GenericChatForm::copyLink()
+{
+    QString linkText = copyLinkAction->data().toString();
+    QApplication::clipboard()->setText(linkText);
+}
+
 void GenericChatForm::retranslateUi()
 {
     QString callObjectName = callButton->objectName();
@@ -624,6 +652,7 @@ void GenericChatForm::retranslateUi()
     saveChatAction->setText(tr("Save chat log"));
     clearAction->setText(tr("Clear displayed messages"));
     quoteAction->setText(tr("Quote selected text"));
+    copyLinkAction->setText(tr("Copy link address"));
 }
 
 void GenericChatForm::showNetcam()

src/widget/form/genericchatform.h

@@ -95,6 +95,7 @@ protected slots:
     void onShowMessagesClicked();
     void onSplitterMoved(int pos, int index);
     void quoteSelectedText();
+    void copyLink();
 
 private:
     void retranslateUi();
@@ -113,7 +114,7 @@ protected:
     virtual bool eventFilter(QObject* object, QEvent* event) final override;
 
 protected:
-    QAction* saveChatAction, *clearAction, *quoteAction;
+    QAction* saveChatAction, *clearAction, *quoteAction, *copyLinkAction;
     ToxId previousId;
     QDateTime prevMsgDateTime;
     Widget *parent;