File drag&drop: Move mime data creation to central place

Especially when this gets more complicated with additional fancy windows
mime types and custom mime type for opening a file at a specific
location (dropping from Outline, Type Hierarchy et al), we should not
create that complex mime data everywhere by hand.

Change-Id: I37f6ceb287b0cd055501fdd033ac29816434a020
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/libs/utils/fileutils.cpp

@@ -30,6 +30,7 @@
 #include "fileutils.h"
 #include "savefile.h"
 
+#include "algorithm.h"
 #include "hostosinfo.h"
 #include "qtcassert.h"
 
@@ -718,6 +719,26 @@ FileDropSupport::FileDropSupport(QWidget *parentWidget)
     parentWidget->installEventFilter(this);
 }
 
+QStringList FileDropSupport::mimeTypesForFilePaths()
+{
+    return QStringList() << QStringLiteral("text/uri-list");
+}
+
+QMimeData *FileDropSupport::mimeDataForFilePaths(const QStringList &filePaths)
+{
+    QList<QUrl> localUrls = Utils::transform(filePaths, [filePaths](const QString &path) {
+        return QUrl::fromLocalFile(path);
+    });
+    auto data = new QMimeData;
+    data->setUrls(localUrls);
+    return data;
+}
+
+QMimeData *FileDropSupport::mimeDataForFilePath(const QString &filePath)
+{
+    return mimeDataForFilePaths(QStringList() << filePath);
+}
+
 bool FileDropSupport::eventFilter(QObject *obj, QEvent *event)
 {
     Q_UNUSED(obj)