diff --git a/tools/chatgui/src/message_text.cpp b/tools/chatgui/src/message_text.cpp
index 656cfe6c5..0555088ab 100644
--- a/tools/chatgui/src/message_text.cpp
+++ b/tools/chatgui/src/message_text.cpp
@@ -5,6 +5,7 @@
 #include <algorithm>
 #include <climits>
 #include <QCache>
+#include <QCoreApplication>
 #include <QFontDatabase>
 #include <QFontMetricsF>
 #include <QRegularExpression>
@@ -211,11 +212,24 @@ qreal layoutFormattedMessage(QTextLayout& layout, const MessageText& message, in
     option.setTabStopDistance(4 * QFontMetricsF(mono).horizontalAdvance(' ')); layout.setTextOption(option);
     layout.beginLayout();
     qreal height = 0;
+    int block = 0;
     while (true) {
         auto line = layout.createLine();
         if (!line.isValid()) break;
+        if (block < message.code.size() && message.code[block].start == line.textStart()) {
+            height += QFontMetricsF(layout.font()).height() + 8; ++block;
+        }
         line.setLineWidth(qMax(1, width)); line.setPosition(QPointF(0, height)); height += line.height();
     }
     layout.endLayout();
     return qMax(height, QFontMetricsF(layout.font()).height());
 }
+
+QRectF messageCodeCopyRect(const QTextLayout& layout, const MessageCodeBlock& block, int width) {
+    const auto line = layout.lineForTextPosition(block.start);
+    if (!line.isValid()) return {};
+    const QFontMetricsF metrics(layout.font());
+    const qreal height = metrics.height() + 8;
+    const qreal buttonWidth = qMin(qreal(width), metrics.horizontalAdvance(QCoreApplication::translate("ChatGui", "Copy")) + 16);
+    return QRectF(width - buttonWidth, line.y() - height + 2, buttonWidth, height - 4);
+}
diff --git a/tools/chatgui/src/message_text.h b/tools/chatgui/src/message_text.h
index 1d9eb3fc3..f47823b79 100644
--- a/tools/chatgui/src/message_text.h
+++ b/tools/chatgui/src/message_text.h
@@ -34,3 +34,6 @@ QSharedPointer<const MessageText> formattedMessageText(const QModelIndex& index)
 
 // Настроить layout с уже заданным базовым font; width > 0, dark выбирает цвета. Возвращает высоту строк.
 qreal layoutFormattedMessage(QTextLayout& layout, const MessageText& message, int width, bool dark);
+
+// Прямоугольник Copy в координатах готового layout; пустой, если у блока нет строки.
+QRectF messageCodeCopyRect(const QTextLayout& layout, const MessageCodeBlock& block, int width);