From 8168df849182aab1424867658254826e8b5ed78e Mon Sep 17 00:00:00 2001
From: Kai Uwe Broulik <kde@privat.broulik.de>
Date: Sat, 5 Aug 2023 16:48:37 +0200
Subject: client: Convert text/x-moz-urls to text/uri-list

Similar to how it's done in the XCB QPA.

This format is used by both Firefox and Chrome
for exchanging URLs.

Pick-to: 6.5
Change-Id: Icd4406ff6297ea2800f4e1389ffc2878ee1ccb65
Reviewed-by: David Edmundson <davidedmundson@kde.org>
(cherry picked from commit 80a3359598553298b544feae0a7e7399d6cfd9a7)
Reviewed-by: Liang Qi <liang.qi@qt.io>
---
 src/client/qwaylanddataoffer.cpp                   | 49 ++++++++++++++++++++++
 .../auto/client/datadevicev1/tst_datadevicev1.cpp  | 44 +++++++++++++++++++
 2 files changed, 93 insertions(+)

diff --git a/src/client/qwaylanddataoffer.cpp b/src/client/qwaylanddataoffer.cpp
index 046385e91..b22887495 100644
--- a/src/client/qwaylanddataoffer.cpp
+++ b/src/client/qwaylanddataoffer.cpp
@@ -20,6 +20,47 @@ static QString utf8Text()
     return QStringLiteral("text/plain;charset=utf-8");
 }
 
+static QString uriList()
+{
+    return QStringLiteral("text/uri-list");
+}
+
+static QString mozUrl()
+{
+    return QStringLiteral("text/x-moz-url");
+}
+
+static QByteArray convertData(const QString &originalMime, const QString &newMime, const QByteArray &data)
+{
+    if (originalMime == newMime)
+        return data;
+
+    // Convert text/x-moz-url, which is an UTF-16 string of
+    // URL and page title pairs, all separated by line breaks, to text/uri-list.
+    // see also qtbase/src/plugins/platforms/xcb/qxcbmime.cpp
+    if (originalMime == uriList() && newMime == mozUrl()) {
+        if (data.size() > 1) {
+            const QString str = QString::fromUtf16(
+                  reinterpret_cast<const char16_t *>(data.constData()), data.size() / 2);
+            if (!str.isNull()) {
+                QByteArray converted;
+                const auto urls = QStringView{str}.split(u'\n');
+                // Only the URL is interesting, skip the page title.
+                for (int i = 0; i < urls.size(); i += 2) {
+                    const QUrl url(urls.at(i).trimmed().toString());
+                    if (url.isValid()) {
+                        converted += url.toEncoded();
+                        converted += "\r\n";
+                    }
+                }
+                return converted;
+            }
+        }
+    }
+
+    return data;
+}
+
 QWaylandDataOffer::QWaylandDataOffer(QWaylandDisplay *display, struct ::wl_data_offer *offer)
     : QtWayland::wl_data_offer(offer)
     , m_display(display)
@@ -105,6 +146,9 @@ bool QWaylandMimeData::hasFormat_sys(const QString &mimeType) const
     if (mimeType == QStringLiteral("text/plain") && m_types.contains(utf8Text()))
         return true;
 
+    if (mimeType == uriList() && m_types.contains(mozUrl()))
+        return true;
+
     return false;
 }
 
@@ -126,6 +170,8 @@ QVariant QWaylandMimeData::retrieveData_sys(const QString &mimeType, QMetaType t
     if (!m_types.contains(mimeType)) {
         if (mimeType == QStringLiteral("text/plain") && m_types.contains(utf8Text()))
             mime = utf8Text();
+        else if (mimeType == uriList() && m_types.contains(mozUrl()))
+            mime = mozUrl();
         else
             return QVariant();
     }
@@ -147,6 +193,9 @@ QVariant QWaylandMimeData::retrieveData_sys(const QString &mimeType, QMetaType t
     }
 
     close(pipefd[0]);
+
+    content = convertData(mimeType, mime, content);
+
     m_data.insert(mimeType, content);
     return content;
 }
diff --git a/tests/auto/client/datadevicev1/tst_datadevicev1.cpp b/tests/auto/client/datadevicev1/tst_datadevicev1.cpp
index cdbf7379a..bb831564a 100644
--- a/tests/auto/client/datadevicev1/tst_datadevicev1.cpp
+++ b/tests/auto/client/datadevicev1/tst_datadevicev1.cpp
@@ -31,6 +31,7 @@ private slots:
     void initTestCase();
     void pasteAscii();
     void pasteUtf8();
+    void pasteMozUrl();
     void destroysPreviousSelection();
     void destroysSelectionWithSurface();
     void destroysSelectionOnLeave();
@@ -123,6 +124,49 @@ void tst_datadevicev1::pasteUtf8()
     QTRY_COMPARE(window.m_text, "face with tears of joy: 😂");
 }
 
+void tst_datadevicev1::pasteMozUrl()
+{
+    class Window : public QRasterWindow {
+    public:
+        void mousePressEvent(QMouseEvent *) override { m_urls = QGuiApplication::clipboard()->mimeData()->urls(); }
+        QList<QUrl> m_urls;
+    };
+
+    Window window;
+    window.resize(64, 64);
+    window.show();
+
+    QCOMPOSITOR_TRY_VERIFY(xdgSurface() && xdgSurface()->m_committedConfigureSerial);
+    exec([&] {
+        auto *client = xdgSurface()->resource()->client();
+        auto *offer = dataDevice()->sendDataOffer(client, {"text/x-moz-url"});
+        connect(offer, &DataOffer::receive, [](QString mimeType, int fd) {
+            QFile file;
+            file.open(fd, QIODevice::WriteOnly, QFile::FileHandleFlag::AutoCloseHandle);
+            QCOMPARE(mimeType, "text/x-moz-url");
+            const QString content("https://www.qt.io/\nQt\nhttps://www.example.com/\nExample Website");
+            // Need UTF-16.
+            file.write(reinterpret_cast<const char *>(content.data()), content.size() * 2);
+            file.close();
+        });
+        dataDevice()->sendSelection(offer);
+
+        auto *surface = xdgSurface()->m_surface;
+        keyboard()->sendEnter(surface); // Need to set keyboard focus according to protocol
+
+        pointer()->sendEnter(surface, {32, 32});
+        pointer()->sendFrame(client);
+        pointer()->sendButton(client, BTN_LEFT, 1);
+        pointer()->sendFrame(client);
+        pointer()->sendButton(client, BTN_LEFT, 0);
+        pointer()->sendFrame(client);
+    });
+
+    QTRY_COMPARE(window.m_urls.count(), 2);
+    QCOMPARE(window.m_urls.at(0), QUrl("https://www.qt.io/"));
+    QCOMPARE(window.m_urls.at(1), QUrl("https://www.example.com/"));
+}
+
 void tst_datadevicev1::destroysPreviousSelection()
 {
     QRasterWindow window;
-- 
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