src: Fixed issues with relative paths

src/lib/utility/file/FilePath.cpp

@@ -191,6 +191,11 @@ FilePath FilePath::relativeTo(const FilePath& other) const
 		r /= *itA;
 	}
 
+	if (r.empty())
+	{
+		r = "./";
+	}
+
 	return r;
 }
 

src/lib_gui/qt/element/QtDirectoryListBox.cpp

@@ -270,12 +270,17 @@ void QtDirectoryListBox::setStringList(const std::vector<std::string>& list)
 {
 	clear();
 
+	FilePath root = m_relativeRootDirectory;
+	m_relativeRootDirectory = FilePath();
+
 	for (const std::string& str : list)
 	{
 		QtListItemWidget* widget = addListBoxItem();
 		widget->setText(QString::fromStdString(str));
 	}
 
+	m_relativeRootDirectory = root;
+
 	QTimer::singleShot(1, this, SLOT(resize()));
 }
 

src/test/FilePathTestSuite.h

@@ -99,6 +99,13 @@ public:
 		TS_ASSERT_EQUALS(pathA.relativeTo(pathB).str(), "../a.cpp");
 	}
 
+	void test_file_path_relative_to_same_directory()
+	{
+		FilePath pathA("data/FilePathTestSuite/test");
+
+		TS_ASSERT_EQUALS(pathA.relativeTo(pathA).str(), "./");
+	}
+
 	void test_file_path_file_name()
 	{
 		FilePath path("data/FilePathTestSuite/abc.h");