From 56fe1cab954948f72bb8842edf2b16f74f1073da Mon Sep 17 00:00:00 2001
From: evgeny <evgeny@adaptto.ru>
Date: Sun, 4 Oct 2026 14:56:10 +0200
Subject: [PATCH] Render and hit-test wrapped invitation links in desktop
 messages

---
 tools/chatgui/src/messagedelegate.cpp | 61 ++++++++++++++++++++++++++-
 tools/chatgui/src/messagedelegate.h   |  1 +
 2 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/tools/chatgui/src/messagedelegate.cpp b/tools/chatgui/src/messagedelegate.cpp
index 42eff6a8..fb146008 100644
--- a/tools/chatgui/src/messagedelegate.cpp
+++ b/tools/chatgui/src/messagedelegate.cpp
@@ -24,6 +24,55 @@
 #include <QDebug>
 #include <QImageReader>
 #include <QPersistentModelIndex>
+#include <QRegularExpression>
+
+/* Один layout для размеров, отрисовки и hit-test длинных invite-ссылок. */
+static qreal layoutInviteText(QTextLayout& layout, int width) {
+    QTextOption option; option.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+    layout.setTextOption(option);
+    static const QRegularExpression pattern(QStringLiteral("utun://[A-Za-z0-9+/]+={0,2}"));
+    QVector<QTextLayout::FormatRange> formats;
+    auto matches = pattern.globalMatch(layout.text());
+    while (matches.hasNext()) {
+        auto match = matches.next();
+        QTextLayout::FormatRange range;
+        range.start = match.capturedStart(); range.length = match.capturedLength();
+        range.format.setForeground(QColor(0x33, 0x90, 0xEC)); range.format.setFontUnderline(true);
+        formats.append(range);
+    }
+    layout.setFormats(formats);
+    layout.beginLayout();
+    qreal y = 0;
+    while (true) {
+        auto line = layout.createLine();
+        if (!line.isValid()) break;
+        line.setLineWidth(qMax(1, width)); line.setPosition(QPointF(0, y)); y += line.height();
+    }
+    layout.endLayout();
+    return y;
+}
+
+QString MessageDelegate::inviteLinkAt(const QStyleOptionViewItem& option, const QModelIndex& index, const QPoint& point) const {
+    const QString text = index.data(MsgTextRole).toString();
+    if (!text.contains(QStringLiteral("utun://"))) return {};
+    const Layout geometry = calcLayout(option, index);
+    if (geometry.isVoice || geometry.isFile || geometry.isVideo || geometry.isImage || geometry.emojiOnly) return {};
+    const QPoint local = point - option.rect.topLeft() - geometry.textRect.topLeft();
+    if (!QRect(QPoint(0, 0), geometry.textRect.size()).contains(local)) return {};
+    QString display = text; display.replace('\n', QChar(0x2028));
+    QTextLayout layout(display, option.font);
+    layoutInviteText(layout, geometry.textRect.width());
+    for (int i = 0; i < layout.lineCount(); ++i) {
+        const auto line = layout.lineAt(i);
+        if (local.y() < line.y() || local.y() >= line.y() + line.height()) continue;
+        if (local.x() < line.x() || local.x() >= line.x() + line.naturalTextWidth()) return {};
+        const int position = line.xToCursor(local.x(), QTextLine::CursorOnCharacter);
+        for (const auto& range : layout.formats()) {
+            if (position >= range.start && position < range.start + range.length) return text.mid(range.start, range.length);
+        }
+    }
+    return {};
+}
 
 MessageDelegate::MessageDelegate(QObject *parent)
     : QStyledItemDelegate(parent) {}
@@ -267,6 +316,11 @@ QSize MessageDelegate::sizeHint(const QStyleOptionViewItem &option,
 
 static int measureTextHeight(const QFont &font, const QString &text, int width) {
     if (text.isEmpty() || width <= 0) return 0;
+    if (text.contains(QStringLiteral("utun://"))) {
+        QString display = text; display.replace('\n', QChar(0x2028));
+        QTextLayout layout(display, font);
+        return (int)std::ceil(layoutInviteText(layout, width));
+    }
     QRect r = QFontMetrics(font).boundingRect(QRect(0, 0, width, 100000),
                                                Qt::AlignLeft | Qt::TextWordWrap, text);
     return r.height();
@@ -1314,7 +1368,12 @@ void MessageDelegate::paint(QPainter *painter, const QStyleOptionViewItem &optio
     painter->setFont(textFont);
 
     QString msgText = index.data(MsgTextRole).toString();
-    painter->drawText(L.textRect, Qt::AlignLeft | Qt::TextWordWrap, msgText);
+    if (msgText.contains(QStringLiteral("utun://"))) {
+        QString display = msgText; display.replace('\n', QChar(0x2028));
+        QTextLayout layout(display, textFont);
+        layoutInviteText(layout, L.textRect.width());
+        layout.draw(painter, L.textRect.topLeft());
+    } else painter->drawText(L.textRect, Qt::AlignLeft | Qt::TextWordWrap, msgText);
 
     if (singleTextSel && cv) {
         const auto &ts = cv->textSelection();
diff --git a/tools/chatgui/src/messagedelegate.h b/tools/chatgui/src/messagedelegate.h
index 85be5b79..3d9fbd77 100644
--- a/tools/chatgui/src/messagedelegate.h
+++ b/tools/chatgui/src/messagedelegate.h
@@ -57,6 +57,7 @@ public:
     bool editorEvent(QEvent *event, QAbstractItemModel *model,
                      const QStyleOptionViewItem &option,
                      const QModelIndex &index) override;
+    QString inviteLinkAt(const QStyleOptionViewItem& option, const QModelIndex& index, const QPoint& point) const;
 
     static void startAutoPlay(const QString& filePath, float actualDurationSec, uint64_t playbackId);
     static void stopAllAutoPlay();