Fix dnd on subject lineedit. When it's an url we don't want to

copy url we want to attach it

src/editor/kmcomposerwin.cpp

@@ -335,6 +335,9 @@ KMComposerWin::KMComposerWin(const KMime::Message::Ptr &aMsg,
     mEdtSubject = new SubjectLineEditWithAutoCorrection(mHeadersArea, QStringLiteral("kmail2rc"));
     mEdtSubject->installEventFilter(this);
     mEdtSubject->setAutocorrection(KMKernel::self()->composerAutoCorrection());
+    connect(mEdtSubject, &SubjectLineEditWithAutoCorrection::handleMimeData, this, [this](const QMimeData *mimeData) {
+        insertFromMimeData(mimeData, false);
+    });
     mLblIdentity = new QLabel(i18n("&Identity:"), mHeadersArea);
     mDictionaryLabel = new QLabel(i18n("&Dictionary:"), mHeadersArea);
     mLblFcc = new QLabel(i18n("&Sent-Mail folder:"), mHeadersArea);

src/editor/subjectlineeditwithautocorrection.cpp

@@ -6,6 +6,8 @@
 
 #include "subjectlineeditwithautocorrection.h"
 #include <KLocalizedString>
+#include <QDropEvent>
+#include <QMimeData>
 
 SubjectLineEditWithAutoCorrection::SubjectLineEditWithAutoCorrection(QWidget *parent, const QString &configFile)
     : PimCommon::LineEditWithAutoCorrection(parent, configFile)
@@ -17,3 +19,14 @@ SubjectLineEditWithAutoCorrection::SubjectLineEditWithAutoCorrection(QWidget *pa
 SubjectLineEditWithAutoCorrection::~SubjectLineEditWithAutoCorrection()
 {
 }
+
+void SubjectLineEditWithAutoCorrection::dropEvent(QDropEvent *event)
+{
+    const QMimeData *mimeData = event->mimeData();
+    if (mimeData->hasUrls()) {
+        Q_EMIT handleMimeData(mimeData);
+        event->accept();
+        return;
+    }
+    PimCommon::LineEditWithAutoCorrection::dropEvent(event);
+}

src/editor/subjectlineeditwithautocorrection.h

@@ -14,4 +14,10 @@ class KMAILTESTS_TESTS_EXPORT SubjectLineEditWithAutoCorrection : public PimComm
 public:
     explicit SubjectLineEditWithAutoCorrection(QWidget *parent, const QString &configFile);
     ~SubjectLineEditWithAutoCorrection() override;
+
+protected:
+    void dropEvent(QDropEvent *event) override;
+
+Q_SIGNALS:
+    void handleMimeData(const QMimeData *mimeData);
 };