Description: Fix DND for MTP mounted folders
Author: Tsu Jan <tsujan2000@gmail.com>
Bug-Upstream: https://github.com/lxqt/pcmanfm-qt/issues/301
Applied-Upstream: https://github.com/lxqt/libfm-qt/commit/7de18bc89b9b47f66de54a7e347bf8d391d44a48
Last-Update: 2019-08-17
--- a/src/foldermodel.cpp
+++ b/src/foldermodel.cpp
@@ -384,7 +384,7 @@ QStringList FolderModel::mimeTypes() con
     // the real implementation is in FolderView::childDropEvent().
     types << "XdndDirectSave0";
     types << "text/uri-list";
-    // types << "x-special/gnome-copied-files";
+    types << QStringLiteral("libfm/files"); // see FolderModel::mimeData() below
     return types;
 }
 
@@ -407,6 +407,9 @@ QMimeData* FolderModel::mimeData(const Q
         }
     }
     data->setData("text/uri-list", urilist);
+    // NOTE: The mimetype "text/uri-list" changes the list in QMimeData::setData() to get URLs
+    // but some protocols (like MTP) may need the original list to query file info.
+    data->setData(QStringLiteral("libfm/files"), urilist);
 
     return data;
 }
@@ -442,10 +445,19 @@ bool FolderModel::dropMimeData(const QMi
         destPath = path();
     }
 
+    Fm::FilePathList srcPaths;
+    // try to get paths from the original data
+    if(data->hasFormat(QStringLiteral("libfm/files"))) {
+        QByteArray _data = data->data(QStringLiteral("libfm/files"));
+        srcPaths = pathListFromUriList(_data.data());
+    }
+    if(srcPaths.empty() && data->hasUrls()) {
+        srcPaths = Fm::pathListFromQUrls(data->urls());
+    }
+
     // FIXME: should we put this in dropEvent handler of FolderView instead?
-    if(data->hasUrls()) {
+    if(!srcPaths.empty()) {
         //qDebug("drop action: %d", action);
-        auto srcPaths = pathListFromQUrls(data->urls());
         switch(action) {
         case Qt::CopyAction:
             FileOperation::copyFiles(srcPaths, destPath);