Fix DND MTP Bug

Summary:
Bug Description: DND from mtp:// mounted folders do not work. DND of local files works, though.
	 Patched src/foldermodel.cpp by hand. Had a nice cpp exercise. XD

Test Plan: Test if DND from mtp:// mounted folders works or not.

Reviewers: tsimonq2, wxl

Reviewed By: tsimonq2, wxl

Subscribers: kc2bez

Maniphest Tasks: T99

Differential Revision: https://phab.lubuntu.me/D32

debian/changelog

@@ -1,3 +1,9 @@
+libfm-qt (0.14.1-9ubuntu3) eoan; urgency=medium
+
+  * Fixed DND not working for mtp:// mounted folders
+
+ -- Raman Sarda <theloudspeaker@lubuntu.me>  Sat, 17 Aug 2019 10:11:52 +0530
+
 libfm-qt (0.14.1-9ubuntu2) eoan; urgency=medium
 
   * Rebuild against Qt 5.12.4.

debian/patches/fix-dnd-mtp.patch

@@ -0,0 +1,48 @@
+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);

debian/patches/series

@@ -4,3 +4,4 @@ fix-license-headers.patch
 dont-ignore-crea-del-sequences.patch
 workaround-glib-recursive-moving-error.patch
 workaround-missed-file-monitoring.patch
+fix-dnd-mtp.patch