diff options
Diffstat (limited to 'sources/pyside2/libpyside/feature_select.cpp')
| -rw-r--r-- | sources/pyside2/libpyside/feature_select.cpp | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/sources/pyside2/libpyside/feature_select.cpp b/sources/pyside2/libpyside/feature_select.cpp index 7b98b03f0..bc4461366 100644 --- a/sources/pyside2/libpyside/feature_select.cpp +++ b/sources/pyside2/libpyside/feature_select.cpp @@ -51,7 +51,7 @@ // This functionality is no longer implemented in the signature module, since // the PyCFunction getsets do not have to be modified any longer. // Instead, we simply exchange the complete class dicts. This is done in the -// basewrapper.cpp file. +// basewrapper.cpp file and in every generated `tp_(get|set)attro`. // // This is the general framework of the switchable extensions. // A maximum of eight features is planned so far. This seems to be enough. @@ -65,10 +65,10 @@ ------------------------------------- The basic idea is to replace the `tp_dict` of a QObject derived type. -This way, we can replace the methods of the dict in no time. +This way, we can replace the methods of the class in no time. The crucial point to understand is how the `tp_dict` is actually accessed: -When you type "QObject.__dict__", the descriptor of SbkObjectType_Type +When you type "QObject.__dict__", the descriptor of `SbkObjectType_Type` is called. This descriptor is per default unassigned, so the base class PyType_Type provides the tp_getset method `type_dict`: @@ -111,9 +111,9 @@ looks into the `__name__` attribute of the active module and decides which version of `tp_dict` is needed. Then the right dict is searched in the ring and created if not already there. -Furthermore, we need to overwrite every `tp_getattro` and `tp_setattro` -with a version that switches dicts before looking up methods. -The dict changing must follow the `tp_mro` in order to change all names. +Furthermore, we need to overwrite every `tp_(get|set)attro` with a version +that switches dicts right before looking up methods. +The dict changing must walk the whole `tp_mro` in order to change all names. This is everything that the following code does. @@ -124,7 +124,7 @@ namespace PySide { namespace Feature { using namespace Shiboken; -static PyObject *getFeatureSelectID() +static inline PyObject *getFeatureSelectID() { static PyObject *zero = PyInt_FromLong(0); static PyObject *feature_dict = GetFeatureDict(); @@ -312,8 +312,12 @@ static bool createNewFeatureSet(PyTypeObject *type, PyObject *select_id) static bool SelectFeatureSetSubtype(PyTypeObject *type, PyObject *select_id) { + /* + * This is the selector for one sublass. We need to call this for + * every subclass until no more subclasses or reaching the wanted id. + */ if (Py_TYPE(type->tp_dict) == Py_TYPE(PyType_Type.tp_dict)) { - // PYSIDE-1019: On first touch, we initialize the dynamic naming. + // On first touch, we initialize the dynamic naming. // The dict type will be replaced after the first call. if (!replaceClassDict(type)) { Py_FatalError("failed to replace class dict!"); @@ -329,16 +333,18 @@ static bool SelectFeatureSetSubtype(PyTypeObject *type, PyObject *select_id) return true; } -static PyObject *SelectFeatureSet(PyTypeObject *type) +static inline PyObject *SelectFeatureSet(PyTypeObject *type) { /* - * This is the main function of the module. - * Generated functions call this directly. - * Shiboken will assign it via a public hook of `basewrapper.cpp`. + * This is the main function of the module. + * The purpose of this function is to switch the dict of a class right + * before a (get|set)attro call is performed. + * + * Generated functions call this directly. + * Shiboken will assign it via a public hook of `basewrapper.cpp`. */ if (Py_TYPE(type->tp_dict) == Py_TYPE(PyType_Type.tp_dict)) { - // PYSIDE-1019: On first touch, we initialize the dynamic naming. - // The dict type will be replaced after the first call. + // We initialize the dynamic features by using our own dict type. if (!replaceClassDict(type)) return nullptr; } @@ -404,7 +410,7 @@ void init() // basewrapper.cpp file. // -static PyObject *methodWithLowerName(PyTypeObject *type, +static PyObject *methodWithNewName(PyTypeObject *type, PyMethodDef *meth, const char *new_name) { @@ -456,7 +462,7 @@ static bool feature_01_addLowerNames(PyTypeObject *type, PyObject *prev_dict) PyMethodDef *meth = type->tp_methods; for (; meth != nullptr && meth->ml_name != nullptr; ++meth) { const char *name = String::toCString(String::getSnakeCaseName(meth->ml_name, true)); - AutoDecRef new_method(methodWithLowerName(type, meth, name)); + AutoDecRef new_method(methodWithNewName(type, meth, name)); if (new_method.isNull()) return false; if (PyDict_SetItemString(lower_dict, name, new_method) < 0) |