feat(chatform): mark message with triple click

This is an implementation of proposal #4003.

src/chatlog/chatlinecontent.cpp

@@ -56,6 +56,10 @@ void ChatLineContent::selectionDoubleClick(QPointF)
 {
 }
 
+void ChatLineContent::selectionTripleClick(QPointF)
+{
+}
+
 void ChatLineContent::selectionFocusChanged(bool)
 {
 }

src/chatlog/chatlinecontent.h

@@ -45,6 +45,7 @@ class ChatLineContent : public QObject, public QGraphicsItem
     virtual void selectionStarted(QPointF scenePos);
     virtual void selectionCleared();
     virtual void selectionDoubleClick(QPointF scenePos);
+    virtual void selectionTripleClick(QPointF scenePos);
     virtual void selectionFocusChanged(bool focusIn);
     virtual bool isOverSelection(QPointF scenePos) const;
     virtual QString getSelectedText() const;

src/chatlog/chatlog.cpp

@@ -105,6 +105,12 @@ ChatLog::ChatLog(QWidget* parent)
     workerTimer->setInterval(5);
     connect(workerTimer, &QTimer::timeout, this, &ChatLog::onWorkerTimeout);
 
+    // This timer is used to detect multiple clicks
+    multiClickTimer = new QTimer(this);
+    multiClickTimer->setSingleShot(true);
+    multiClickTimer->setInterval(QApplication::doubleClickInterval());
+    connect(multiClickTimer, &QTimer::timeout, this, &ChatLog::onMultiClickTimeout);
+
     // selection
     connect(this, &ChatLog::selectionChanged, this, [this]() {
         copyAction->setEnabled(hasTextToBeCopied());
@@ -190,13 +196,22 @@ void ChatLog::mousePressEvent(QMouseEvent* ev)
         clickPos = ev->pos();
         clearSelection();
     }
+
+    // Counts only single clicks and first click of doule click
+    clickCount++;
+    lastClickPos = ev->pos();
+
+    // Triggers on odd click counts
+    handleMultiClickEvent();
 }
 
 void ChatLog::mouseReleaseEvent(QMouseEvent* ev)
 {
     QGraphicsView::mouseReleaseEvent(ev);
 
     selectionScrollDir = NoDirection;
+
+    multiClickTimer->start();
 }
 
 void ChatLog::mouseMoveEvent(QMouseEvent* ev)
@@ -461,6 +476,13 @@ void ChatLog::mouseDoubleClickEvent(QMouseEvent* ev)
 
         emit selectionChanged();
     }
+
+    // Counts the second click of double click
+    clickCount++;
+    lastClickPos = ev->pos();
+
+    // Triggers on even click counts
+    handleMultiClickEvent();
 }
 
 QString ChatLog::getSelectedText() const
@@ -796,6 +818,36 @@ void ChatLog::onWorkerTimeout()
     }
 }
 
+void ChatLog::onMultiClickTimeout()
+{
+    clickCount = 0;
+}
+
+void ChatLog::handleMultiClickEvent()
+{
+    // Ignore single or double clicks
+    if (clickCount < 2)
+        return;
+
+    switch (clickCount) {
+        case 3:
+            QPointF scenePos = mapToScene(lastClickPos);
+            ChatLineContent* content = getContentFromPos(scenePos);
+
+            if (content) {
+                content->selectionTripleClick(scenePos);
+                selClickedCol = content->getColumn();
+                selClickedRow = content->getRow();
+                selFirstRow = content->getRow();
+                selLastRow = content->getRow();
+                selectionMode = Precise;
+
+                emit selectionChanged();
+            }
+            break;
+    }
+}
+
 void ChatLog::showEvent(QShowEvent*)
 {
     // Empty.

src/chatlog/chatlog.h

@@ -74,6 +74,7 @@ public slots:
 private slots:
     void onSelectionTimerTimeout();
     void onWorkerTimeout();
+    void onMultiClickTimeout();
 
 protected:
     QRectF calculateSceneRect() const;
@@ -111,6 +112,7 @@ private slots:
 private:
     void retranslateUi();
     bool isActiveFileTransfer(ChatLine::Ptr l);
+    void handleMultiClickEvent();
 
 private:
     enum SelectionMode
@@ -147,7 +149,10 @@ private slots:
     QGraphicsRectItem* selGraphItem = nullptr;
     QTimer* selectionTimer = nullptr;
     QTimer* workerTimer = nullptr;
+    QTimer* multiClickTimer = nullptr;
     AutoScrollDirection selectionScrollDir = NoDirection;
+    int clickCount = 0;
+    QPoint lastClickPos;
 
     // worker vars
     int workerLastIndex = 0;

src/chatlog/content/text.cpp

@@ -121,6 +121,30 @@ void Text::selectionDoubleClick(QPointF scenePos)
     update();
 }
 
+void Text::selectionTripleClick(QPointF scenePos)
+{
+    if (!doc)
+        return;
+
+    int cur = cursorFromPos(scenePos);
+
+    if (cur >= 0) {
+        QTextCursor cursor(doc);
+        cursor.setPosition(cur);
+        cursor.select(QTextCursor::BlockUnderCursor);
+
+        selectionAnchor = cursor.selectionStart();
+        selectionEnd = cursor.selectionEnd();
+
+        if (cursor.block().isValid() && cursor.block().blockNumber() != 0)
+            selectionAnchor++;
+
+        selectedText = extractSanitizedText(getSelectionStart(), getSelectionEnd());
+    }
+
+    update();
+}
+
 void Text::selectionFocusChanged(bool focusIn)
 {
     selectionHasFocus = focusIn;

src/chatlog/content/text.h

@@ -43,6 +43,7 @@ class Text : public ChatLineContent
     virtual void selectionStarted(QPointF scenePos) final;
     virtual void selectionCleared() final;
     virtual void selectionDoubleClick(QPointF scenePos) final;
+    virtual void selectionTripleClick(QPointF scenePos) final;
     virtual void selectionFocusChanged(bool focusIn) final;
     virtual bool isOverSelection(QPointF scenePos) const final;
     virtual QString getSelectedText() const final;