Fix #4570: display folders in entity selector and sound chooser are c…

…luttered with PK4 top level nodes when DR is just pointed just to the TDM root path.

plugins/archivezip/ZipArchive.cpp

@@ -5,18 +5,22 @@
 
 #include "pkzip.h"
 #include "zlibstream.h"
+#include "os/fs.h"
 #include "os/path.h"
 
 #include "DeflatedArchiveFile.h"
 #include "DeflatedArchiveTextFile.h"
 
 ZipArchive::ZipArchive(const std::string& name) :
 	m_name(name),
+	_containingFolder(os::standardPathWithSlash(fs::path(name).remove_filename())),
 	m_istream(name)
 {
-	if (!m_istream.failed()) {
-		if (!read_pkzip()) {
-			rError() << "ERROR: invalid zip-file " << name.c_str() << '\n';
+	if (!m_istream.failed())
+	{
+		if (!read_pkzip())
+		{
+			rError() << "ERROR: invalid zip-file " << name << std::endl;
 		}
 	}
 }
@@ -99,14 +103,14 @@ ArchiveTextFilePtr ZipArchive::openTextFile(const std::string& name)
 			case ZipRecord::eStored:
 				return ArchiveTextFilePtr(new StoredArchiveTextFile(name,
 					m_name,
-					m_name,
+					_containingFolder,
 					m_istream.tell(),
 					file->m_stream_size));
 
 			case ZipRecord::eDeflated:
 				return ArchiveTextFilePtr(new DeflatedArchiveTextFile(name,
 					m_name,
-					m_name,
+					_containingFolder,
 					m_istream.tell(),
 					file->m_stream_size));
 		}

plugins/archivezip/ZipArchive.h

@@ -34,7 +34,8 @@ class ZipArchive :
 	public Archive
 {
 	ZipFileSystem m_filesystem;
-	std::string m_name;
+	std::string m_name;				// the full path to this Zip
+	std::string _containingFolder;  // the folder this Zip is located in
 	FileInputStream m_istream;
     std::mutex _streamLock;