build support for pathlib.Path, baseline

[ChangeLog][PySide6] pathlib.Path gets additionally accepted for
all function arguments which have a std::filesystem::path type.

This is a first part that implements those modifications
which have a std::filesystem::path entry. In a later patch,
all the possible other Path insertions will be made.

Task-number: PYSIDE-1499
Change-Id: I2dec04dbdb2aaff6ca56c39b28f60281262fe078
Reviewed-by: Christian Tismer <tismer@stackless.com>

2 files changed, 21 insertions, 1 deletions

diff --git a/sources/pyside6/libpyside/pyside.cpp b/sources/pyside6/libpyside/pyside.cpp
index a78e4e9eb..16d77ab57 100644
--- a/sources/pyside6/libpyside/pyside.cpp
+++ b/sources/pyside6/libpyside/pyside.cpp
@@ -478,7 +478,8 @@ void setQuickRegisterItemFunction(QuickRegisterItemFunction function)
 #endif // PYSIDE_QML_SUPPORT
 
 // Inspired by Shiboken::String::toCString;
-QString pyStringToQString(PyObject *str) {
+QString pyStringToQString(PyObject *str)
+{
     if (str == Py_None)
         return QString();
 
@@ -495,6 +496,20 @@ QString pyStringToQString(PyObject *str) {
     return QString();
 }
 
+// PySide-1499: Provide an efficient, correct PathLike interface
+QString pyPathToQString(PyObject *path)
+{
+    // str or bytes pass through
+    if (PyUnicode_Check(path) || PyBytes_Check(path))
+        return pyStringToQString(path);
+
+    // Let PyOS_FSPath do its work and then fix the result for Windows.
+    Shiboken::AutoDecRef strPath(PyOS_FSPath(path));
+    if (strPath.isNull())
+        return QString();
+    return QDir::fromNativeSeparators(pyStringToQString(strPath));
+}
+
 static const unsigned char qt_resource_name[] = {
   // qt
   0x0,0x2,
diff --git a/sources/pyside6/libpyside/pyside.h b/sources/pyside6/libpyside/pyside.h
index 3c4ae92b2..9bb0ab12e 100644
--- a/sources/pyside6/libpyside/pyside.h
+++ b/sources/pyside6/libpyside/pyside.h
@@ -157,6 +157,11 @@ PYSIDE_API void setQuickRegisterItemFunction(QuickRegisterItemFunction function)
 PYSIDE_API QString pyStringToQString(PyObject *str);
 
 /**
+ * Provide an efficient, correct PathLike interface.
+ */
+PYSIDE_API QString pyPathToQString(PyObject *path);
+
+/**
  * Registers a dynamic "qt.conf" file with the Qt resource system.
  *
  * This is used in a standalone build, to inform QLibraryInfo of the Qt prefix (where Qt libraries