# HG changeset patch
# User Bram Moolenaar <bram@vim.org>
# Date 1368623549 -7200
# Node ID cfd76908da252e03f46ea15cde44a3664e895fb0
# Parent  7324bd8b67b191bb4b24af1765703ca2754e045e
updated for version 7.3.949
Problem:    Python: no easy access to tabpages.
Solution:   Add vim.tabpages and vim.current.tabpage. (ZyX)

diff --git a/runtime/doc/if_pyth.txt b/runtime/doc/if_pyth.txt
--- a/runtime/doc/if_pyth.txt
+++ b/runtime/doc/if_pyth.txt
@@ -223,6 +223,20 @@ vim.windows						*python-windows*
 	    :py w in vim.windows	# Membership test
 	    :py n = len(vim.windows)	# Number of elements
 	    :py for w in vim.windows:	# Sequential access
+<	Note: vim.windows object always accesses current tab page,. 
+	|python-tabpage|.windows objects are bound to parent |python-tabpage| 
+	object and always use windows from that tab page (or throw vim.error 
+	in case tab page was deleted). You can keep a reference to both 
+	without keeping a reference to vim module object or |python-tabpage|, 
+	they will not loose their properties in this case.
+
+vim.tabpages						*python-tabpages*
+	A sequence object providing access to the list of vim tab pages. The 
+	object supports the following operations: >
+	    :py t = vim.tabpages[i]	# Indexing (read-only)
+	    :py t in vim.tabpages	# Membership test
+	    :py n = len(vim.tabpages)	# Number of elements
+	    :py for t in vim.tabpages:	# Sequential access
 <
 vim.current						*python-current*
 	An object providing access (via specific attributes) to various
@@ -230,6 +244,7 @@ vim.current						*python-current*
 		vim.current.line	The current line (RW)		String
 		vim.current.buffer	The current buffer (RO)		Buffer
 		vim.current.window	The current window (RO)		Window
+		vim.current.tabpage	The current tab page (RO)	TabPage
 		vim.current.range	The current line range (RO)	Range
 
 	The last case deserves a little explanation.  When the :python or
@@ -375,6 +390,8 @@ 5. Window objects					*python-window*
 Window objects represent vim windows.  You can obtain them in a number of ways:
 	- via vim.current.window (|python-current|)
 	- from indexing vim.windows (|python-windows|)
+	- from indexing "windows" attribute of a tab page (|python-tabpage|)
+	- from the "window" attribute of a tab page (|python-tabpage|)
 
 You can manipulate window objects only through their attributes.  They have no
 methods, and no sequence or other interface.
@@ -407,6 +424,24 @@ The height attribute is writable only if
 The width attribute is writable only if the screen is split vertically.
 
 ==============================================================================
+6. Tab page objects					*python-tabpage*
+
+Tab page objects represent vim tab pages. You can obtain them in a number of 
+ways:
+	- via vim.current.tabpage (|python-current|)
+	- from indexing vim.tabpages (|python-tabpages|)
+
+You can use this object to access tab page windows. They have no methods and 
+no sequence or other interfaces.
+
+Tab page attributes are:
+	number		The tab page number like the one returned by 
+			|tabpagenr()|.
+	windows		Like |python-windows|, but for current tab page.
+	vars		The tab page |t:| variables.
+	window		Current tabpage window.
+
+==============================================================================
 6. pyeval() and py3eval() Vim functions			*python-pyeval*
 
 To facilitate bi-directional interface, you can use |pyeval()| and |py3eval()| 
diff --git a/src/if_py_both.h b/src/if_py_both.h
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -27,6 +27,7 @@ typedef int Py_ssize_t;  /* Python 2.4 a
 
 #define INVALID_BUFFER_VALUE ((buf_T *)(-1))
 #define INVALID_WINDOW_VALUE ((win_T *)(-1))
+#define INVALID_TABPAGE_VALUE ((tabpage_T *)(-1))
 
 static int ConvertFromPyObject(PyObject *, typval_T *);
 static int _ConvertFromPyObject(PyObject *, typval_T *, PyObject *);
@@ -1579,6 +1580,155 @@ static PyMappingMethods OptionsAsMapping
     (objobjargproc) OptionsAssItem,
 };
 
+/* Tabpage object
+ */
+
+typedef struct
+{
+    PyObject_HEAD
+    tabpage_T	*tab;
+} TabPageObject;
+
+static PyObject *WinListNew(TabPageObject *tabObject);
+
+static PyTypeObject TabPageType;
+
+    static int
+CheckTabPage(TabPageObject *this)
+{
+    if (this->tab == INVALID_TABPAGE_VALUE)
+    {
+	PyErr_SetVim(_("attempt to refer to deleted tab page"));
+	return -1;
+    }
+
+    return 0;
+}
+
+    static PyObject *
+TabPageNew(tabpage_T *tab)
+{
+    TabPageObject *self;
+
+    if (TAB_PYTHON_REF(tab))
+    {
+	self = TAB_PYTHON_REF(tab);
+	Py_INCREF(self);
+    }
+    else
+    {
+	self = PyObject_NEW(TabPageObject, &TabPageType);
+	if (self == NULL)
+	    return NULL;
+	self->tab = tab;
+	TAB_PYTHON_REF(tab) = self;
+    }
+
+    return (PyObject *)(self);
+}
+
+    static void
+TabPageDestructor(PyObject *self)
+{
+    TabPageObject *this = (TabPageObject *)(self);
+
+    if (this->tab && this->tab != INVALID_TABPAGE_VALUE)
+	TAB_PYTHON_REF(this->tab) = NULL;
+
+    DESTRUCTOR_FINISH(self);
+}
+
+    static PyObject *
+TabPageAttr(TabPageObject *this, char *name)
+{
+    if (strcmp(name, "windows") == 0)
+	return WinListNew(this);
+    else if (strcmp(name, "number") == 0)
+	return PyLong_FromLong((long) get_tab_number(this->tab));
+    else if (strcmp(name, "vars") == 0)
+	return DictionaryNew(this->tab->tp_vars);
+    else if (strcmp(name, "window") == 0)
+    {
+	/* For current tab window.c does not bother to set or update tp_curwin
+	 */
+	if (this->tab == curtab)
+	    return WindowNew(curwin);
+	else
+	    return WindowNew(this->tab->tp_curwin);
+    }
+    return NULL;
+}
+
+    static PyObject *
+TabPageRepr(PyObject *self)
+{
+    static char repr[100];
+    TabPageObject *this = (TabPageObject *)(self);
+
+    if (this->tab == INVALID_TABPAGE_VALUE)
+    {
+	vim_snprintf(repr, 100, _("<tabpage object (deleted) at %p>"), (self));
+	return PyString_FromString(repr);
+    }
+    else
+    {
+	int	t = get_tab_number(this->tab);
+
+	if (t == 0)
+	    vim_snprintf(repr, 100, _("<tabpage object (unknown) at %p>"),
+								      (self));
+	else
+	    vim_snprintf(repr, 100, _("<tabpage %d>"), t - 1);
+
+	return PyString_FromString(repr);
+    }
+}
+
+static struct PyMethodDef TabPageMethods[] = {
+    /* name,	    function,		calling,    documentation */
+    { NULL,	    NULL,		0,	    NULL }
+};
+
+/*
+ * Window list object
+ */
+
+static PyTypeObject TabListType;
+static PySequenceMethods TabListAsSeq;
+
+typedef struct
+{
+    PyObject_HEAD
+} TabListObject;
+
+    static PyInt
+TabListLength(PyObject *self UNUSED)
+{
+    tabpage_T	*tp = first_tabpage;
+    PyInt	n = 0;
+
+    while (tp != NULL)
+    {
+	++n;
+	tp = tp->tp_next;
+    }
+
+    return n;
+}
+
+    static PyObject *
+TabListItem(PyObject *self UNUSED, PyInt n)
+{
+    tabpage_T	*tp;
+
+    for (tp = first_tabpage; tp != NULL; tp = tp->tp_next, --n)
+	if (n == 0)
+	    return TabPageNew(tp);
+
+    PyErr_SetString(PyExc_IndexError, _("no such tab page"));
+    return NULL;
+}
+
 /* Window object
  */
 
@@ -1588,8 +1738,6 @@ typedef struct
     win_T	*win;
 } WindowObject;
 
-static int WindowSetattr(PyObject *, char *, PyObject *);
-static PyObject *WindowRepr(PyObject *);
 static PyTypeObject WindowType;
 
     static int
@@ -1681,7 +1829,7 @@ WindowAttr(WindowObject *this, char *nam
 	return OptionsNew(SREQ_WIN, this->win, (checkfun) CheckWindow,
 			(PyObject *) this);
     else if (strcmp(name, "number") == 0)
-	return PyLong_FromLong((long) get_win_number(this->win));
+	return PyLong_FromLong((long) get_win_number(this->win, firstwin));
     else if (strcmp(name,"__members__") == 0)
 	return Py_BuildValue("[ssssssss]", "buffer", "cursor", "height", "vars",
 		"options", "number", "row", "col");
@@ -1797,7 +1945,7 @@ WindowRepr(PyObject *self)
     }
     else
     {
-	int	w = get_win_number(this->win);
+	int	w = get_win_number(this->win, firstwin);
 
 	if (w == 0)
 	    vim_snprintf(repr, 100, _("<window object (unknown) at %p>"),
@@ -1824,14 +1972,59 @@ static PySequenceMethods WinListAsSeq;
 typedef struct
 {
     PyObject_HEAD
+    TabPageObject	*tabObject;
 } WinListObject;
 
+    static PyObject *
+WinListNew(TabPageObject *tabObject)
+{
+    WinListObject	*self;
+
+    self = PyObject_NEW(WinListObject, &WinListType);
+    self->tabObject = tabObject;
+    Py_INCREF(tabObject);
+
+    return (PyObject *)(self);
+}
+
+    static void
+WinListDestructor(PyObject *self)
+{
+    TabPageObject	*tabObject = ((WinListObject *)(self))->tabObject;
+
+    if (tabObject)
+	Py_DECREF((PyObject *)(tabObject));
+
+    DESTRUCTOR_FINISH(self);
+}
+
+    static win_T *
+get_firstwin(WinListObject *this)
+{
+    if (this->tabObject)
+    {
+	if (CheckTabPage(this->tabObject))
+	    return NULL;
+	/* For current tab window.c does not bother to set or update tp_firstwin
+	 */
+	else if (this->tabObject->tab == curtab)
+	    return firstwin;
+	else
+	    return this->tabObject->tab->tp_firstwin;
+    }
+    else
+	return firstwin;
+}
+
     static PyInt
-WinListLength(PyObject *self UNUSED)
+WinListLength(PyObject *self)
 {
-    win_T	*w = firstwin;
+    win_T	*w;
     PyInt	n = 0;
 
+    if (!(w = get_firstwin((WinListObject *)(self))))
+	return -1;
+
     while (w != NULL)
     {
 	++n;
@@ -1842,11 +2035,14 @@ WinListLength(PyObject *self UNUSED)
 }
 
     static PyObject *
-WinListItem(PyObject *self UNUSED, PyInt n)
+WinListItem(PyObject *self, PyInt n)
 {
     win_T *w;
 
-    for (w = firstwin; w != NULL; w = W_NEXT(w), --n)
+    if (!(w = get_firstwin((WinListObject *)(self))))
+	return NULL;
+
+    for (; w != NULL; w = W_NEXT(w), --n)
 	if (n == 0)
 	    return WindowNew(w);
 
@@ -3018,12 +3214,15 @@ CurrentGetattr(PyObject *self UNUSED, ch
 	return (PyObject *)BufferNew(curbuf);
     else if (strcmp(name, "window") == 0)
 	return (PyObject *)WindowNew(curwin);
+    else if (strcmp(name, "tabpage") == 0)
+	return (PyObject *)TabPageNew(curtab);
     else if (strcmp(name, "line") == 0)
 	return GetBufferLine(curbuf, (PyInt)curwin->w_cursor.lnum);
     else if (strcmp(name, "range") == 0)
 	return RangeNew(curbuf, RangeStart, RangeEnd);
     else if (strcmp(name,"__members__") == 0)
-	return Py_BuildValue("[ssss]", "buffer", "window", "line", "range");
+	return Py_BuildValue("[sssss]", "buffer", "window", "line", "range",
+		"tabpage");
     else
     {
 	PyErr_SetString(PyExc_AttributeError, name);
@@ -3568,6 +3767,23 @@ init_structs(void)
     WindowType.tp_setattr = WindowSetattr;
 #endif
 
+    vim_memset(&TabPageType, 0, sizeof(TabPageType));
+    TabPageType.tp_name = "vim.tabpage";
+    TabPageType.tp_basicsize = sizeof(TabPageObject);
+    TabPageType.tp_dealloc = TabPageDestructor;
+    TabPageType.tp_repr = TabPageRepr;
+    TabPageType.tp_flags = Py_TPFLAGS_DEFAULT;
+    TabPageType.tp_doc = "vim tab page object";
+    TabPageType.tp_methods = TabPageMethods;
+#if PY_MAJOR_VERSION >= 3
+    TabPageType.tp_getattro = TabPageGetattro;
+    TabPageType.tp_alloc = call_PyType_GenericAlloc;
+    TabPageType.tp_new = call_PyType_GenericNew;
+    TabPageType.tp_free = call_PyObject_Free;
+#else
+    TabPageType.tp_getattr = TabPageGetattr;
+#endif
+
     vim_memset(&BufMapType, 0, sizeof(BufMapType));
     BufMapType.tp_name = "vim.bufferlist";
     BufMapType.tp_basicsize = sizeof(BufMapObject);
@@ -3582,6 +3798,14 @@ init_structs(void)
     WinListType.tp_as_sequence = &WinListAsSeq;
     WinListType.tp_flags = Py_TPFLAGS_DEFAULT;
     WinListType.tp_doc = "vim window list";
+    WinListType.tp_dealloc = WinListDestructor;
+
+    vim_memset(&TabListType, 0, sizeof(TabListType));
+    TabListType.tp_name = "vim.tabpagelist";
+    TabListType.tp_basicsize = sizeof(TabListType);
+    TabListType.tp_as_sequence = &TabListAsSeq;
+    TabListType.tp_flags = Py_TPFLAGS_DEFAULT;
+    TabListType.tp_doc = "vim tab page list";
 
     vim_memset(&RangeType, 0, sizeof(RangeType));
     RangeType.tp_name = "vim.range";
diff --git a/src/if_python.c b/src/if_python.c
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -624,10 +624,12 @@ static int initialised = 0;
 
 #define WIN_PYTHON_REF(win) win->w_python_ref
 #define BUF_PYTHON_REF(buf) buf->b_python_ref
+#define TAB_PYTHON_REF(tab) tab->tp_python_ref
 
 static PyObject *OutputGetattr(PyObject *, char *);
 static PyObject *BufferGetattr(PyObject *, char *);
 static PyObject *WindowGetattr(PyObject *, char *);
+static PyObject *TabPageGetattr(PyObject *, char *);
 static PyObject *RangeGetattr(PyObject *, char *);
 static PyObject *DictionaryGetattr(PyObject *, char*);
 static PyObject *ListGetattr(PyObject *, char *);
@@ -1137,6 +1139,24 @@ RangeAssSlice(PyObject *self, PyInt lo, 
 		      &((RangeObject *)(self))->end);
 }
 
+/* TabPage object - Implementation
+ */
+
+    static PyObject *
+TabPageGetattr(PyObject *self, char *name)
+{
+    PyObject *r;
+
+    if (CheckTabPage((TabPageObject *)(self)))
+	return NULL;
+
+    r = TabPageAttr((TabPageObject *)(self), name);
+    if (r || PyErr_Occurred())
+	return r;
+    else
+	return Py_FindMethod(TabPageMethods, self, name);
+}
+
 /* Window object - Implementation
  */
 
@@ -1155,6 +1175,24 @@ WindowGetattr(PyObject *self, char *name
 	return Py_FindMethod(WindowMethods, self, name);
 }
 
+/* Tab page list object - Definitions
+ */
+
+static PySequenceMethods TabListAsSeq = {
+    (PyInquiry)		TabListLength,	    /* sq_length,    len(x)   */
+    (binaryfunc)	0,		    /* sq_concat,    x+y      */
+    (PyIntArgFunc)	0,		    /* sq_repeat,    x*n      */
+    (PyIntArgFunc)	TabListItem,	    /* sq_item,      x[i]     */
+    (PyIntIntArgFunc)	0,		    /* sq_slice,     x[i:j]   */
+    (PyIntObjArgProc)	0,		    /* sq_ass_item,  x[i]=v   */
+    (PyIntIntObjArgProc) 0,		    /* sq_ass_slice, x[i:j]=v */
+    (objobjproc)	0,
+#if PY_MAJOR_VERSION >= 2
+    (binaryfunc)	0,
+    0,
+#endif
+};
+
 /* Window list object - Definitions
  */
 
@@ -1198,6 +1236,17 @@ python_window_free(win_T *win)
 	WIN_PYTHON_REF(win) = NULL;
     }
 }
+
+    void
+python_tabpage_free(tabpage_T *tab)
+{
+    if (TAB_PYTHON_REF(tab) != NULL)
+    {
+	TabPageObject *tp = TAB_PYTHON_REF(tab);
+	tp->tab = INVALID_TABPAGE_VALUE;
+	TAB_PYTHON_REF(tab) = NULL;
+    }
+}
 #endif
 
 static BufMapObject TheBufferMap =
@@ -1208,6 +1257,7 @@ static BufMapObject TheBufferMap =
 static WinListObject TheWindowList =
 {
     PyObject_HEAD_INIT(&WinListType)
+    NULL
 };
 
 static CurrentObject TheCurrent =
@@ -1215,6 +1265,11 @@ static CurrentObject TheCurrent =
     PyObject_HEAD_INIT(&CurrentType)
 };
 
+static TabListObject TheTabPageList =
+{
+    PyObject_HEAD_INIT(&TabListType)
+};
+
     static int
 PythonMod_Init(void)
 {
@@ -1229,8 +1284,10 @@ PythonMod_Init(void)
     PyType_Ready(&BufferType);
     PyType_Ready(&RangeType);
     PyType_Ready(&WindowType);
+    PyType_Ready(&TabPageType);
     PyType_Ready(&BufMapType);
     PyType_Ready(&WinListType);
+    PyType_Ready(&TabListType);
     PyType_Ready(&CurrentType);
     PyType_Ready(&OptionsType);
 
@@ -1246,6 +1303,7 @@ PythonMod_Init(void)
     PyDict_SetItemString(dict, "buffers", (PyObject *)(void *)&TheBufferMap);
     PyDict_SetItemString(dict, "current", (PyObject *)(void *)&TheCurrent);
     PyDict_SetItemString(dict, "windows", (PyObject *)(void *)&TheWindowList);
+    PyDict_SetItemString(dict, "tabpages", (PyObject *)(void *)&TheTabPageList);
     tmp = DictionaryNew(&globvardict);
     PyDict_SetItemString(dict, "vars",    tmp);
     Py_DECREF(tmp);
diff --git a/src/if_python3.c b/src/if_python3.c
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -626,6 +626,7 @@ static int py3initialised = 0;
 
 #define WIN_PYTHON_REF(win) win->w_python3_ref
 #define BUF_PYTHON_REF(buf) buf->b_python3_ref
+#define TAB_PYTHON_REF(tab) tab->tp_python3_ref
 
     static void
 call_PyObject_Free(void *p)
@@ -652,6 +653,7 @@ call_PyType_GenericAlloc(PyTypeObject *t
 static PyObject *OutputGetattro(PyObject *, PyObject *);
 static int OutputSetattro(PyObject *, PyObject *, PyObject *);
 static PyObject *BufferGetattro(PyObject *, PyObject *);
+static PyObject *TabPageGetattro(PyObject *, PyObject *);
 static PyObject *WindowGetattro(PyObject *, PyObject *);
 static int WindowSetattro(PyObject *, PyObject *, PyObject *);
 static PyObject *RangeGetattro(PyObject *, PyObject *);
@@ -1275,6 +1277,26 @@ RangeAsSubscript(PyObject *self, PyObjec
     }
 }
 
+/* TabPage object - Implementation
+ */
+
+    static PyObject *
+TabPageGetattro(PyObject *self, PyObject *nameobj)
+{
+    PyObject *r;
+
+    GET_ATTR_STRING(name, nameobj);
+
+    if (CheckTabPage((TabPageObject *)(self)))
+	return NULL;
+
+    r = TabPageAttr((TabPageObject *)(self), name);
+    if (r || PyErr_Occurred())
+	return r;
+    else
+	return PyObject_GenericGetAttr(self, nameobj);
+}
+
 /* Window object - Implementation
  */
 
@@ -1303,6 +1325,22 @@ WindowSetattro(PyObject *self, PyObject 
     return WindowSetattr(self, name, val);
 }
 
+/* Tab page list object - Definitions
+ */
+
+static PySequenceMethods TabListAsSeq = {
+    (lenfunc)	     TabListLength,	    /* sq_length,    len(x)   */
+    (binaryfunc)     0,			    /* sq_concat,    x+y      */
+    (ssizeargfunc)   0,			    /* sq_repeat,    x*n      */
+    (ssizeargfunc)   TabListItem,	    /* sq_item,      x[i]     */
+    0,					    /* sq_slice,     x[i:j]   */
+    (ssizeobjargproc)0,			    /* sq_as_item,  x[i]=v   */
+    0,					    /* sq_ass_slice, x[i:j]=v */
+    0,					    /* sq_contains */
+    0,					    /* sq_inplace_concat */
+    0,					    /* sq_inplace_repeat */
+};
+
 /* Window list object - Definitions
  */
 
@@ -1497,6 +1535,17 @@ python3_window_free(win_T *win)
 	WIN_PYTHON_REF(win) = NULL;
     }
 }
+
+    void
+python3_tabpage_free(tabpage_T *tab)
+{
+    if (TAB_PYTHON_REF(tab) != NULL)
+    {
+	TabPageObject *tp = TAB_PYTHON_REF(tab);
+	tp->tab = INVALID_TABPAGE_VALUE;
+	TAB_PYTHON_REF(tab) = NULL;
+    }
+}
 #endif
 
 static BufMapObject TheBufferMap =
@@ -1507,6 +1556,7 @@ static BufMapObject TheBufferMap =
 static WinListObject TheWindowList =
 {
     PyObject_HEAD_INIT(&WinListType)
+    NULL
 };
 
 static CurrentObject TheCurrent =
@@ -1514,6 +1564,11 @@ static CurrentObject TheCurrent =
     PyObject_HEAD_INIT(&CurrentType)
 };
 
+static TabListObject TheTabPageList =
+{
+    PyObject_HEAD_INIT(&TabListType)
+};
+
     static PyObject *
 Py3Init_vim(void)
 {
@@ -1526,8 +1581,10 @@ Py3Init_vim(void)
     PyType_Ready(&BufferType);
     PyType_Ready(&RangeType);
     PyType_Ready(&WindowType);
+    PyType_Ready(&TabPageType);
     PyType_Ready(&BufMapType);
     PyType_Ready(&WinListType);
+    PyType_Ready(&TabListType);
     PyType_Ready(&CurrentType);
     PyType_Ready(&DictionaryType);
     PyType_Ready(&ListType);
@@ -1551,6 +1608,8 @@ Py3Init_vim(void)
     PyModule_AddObject(mod, "current", (PyObject *)(void *)&TheCurrent);
     Py_INCREF((PyObject *)(void *)&TheWindowList);
     PyModule_AddObject(mod, "windows", (PyObject *)(void *)&TheWindowList);
+    Py_INCREF((PyObject *)(void *)&TheTabPageList);
+    PyModule_AddObject(mod, "tabpages", (PyObject *)(void *)&TheTabPageList);
 
     PyModule_AddObject(mod, "vars", DictionaryNew(&globvardict));
     PyModule_AddObject(mod, "vvars", DictionaryNew(&vimvardict));
diff --git a/src/proto/if_python.pro b/src/proto/if_python.pro
--- a/src/proto/if_python.pro
+++ b/src/proto/if_python.pro
@@ -6,6 +6,7 @@ void ex_python __ARGS((exarg_T *eap));
 void ex_pyfile __ARGS((exarg_T *eap));
 void python_buffer_free __ARGS((buf_T *buf));
 void python_window_free __ARGS((win_T *win));
+void python_tabpage_free __ARGS((tabpage_T *tab));
 void do_pyeval __ARGS((char_u *str, typval_T *rettv));
 void set_ref_in_python __ARGS((int copyID));
 /* vim: set ft=c : */
diff --git a/src/proto/if_python3.pro b/src/proto/if_python3.pro
--- a/src/proto/if_python3.pro
+++ b/src/proto/if_python3.pro
@@ -6,6 +6,7 @@ void ex_py3 __ARGS((exarg_T *eap));
 void ex_py3file __ARGS((exarg_T *eap));
 void python3_buffer_free __ARGS((buf_T *buf));
 void python3_window_free __ARGS((win_T *win));
+void python3_tabpage_free __ARGS((tabpage_T *tab));
 void do_py3eval __ARGS((char_u *str, typval_T *rettv));
 void set_ref_in_python3 __ARGS((int copyID));
 /* vim: set ft=c : */
diff --git a/src/proto/window.pro b/src/proto/window.pro
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -74,5 +74,6 @@ int match_add __ARGS((win_T *wp, char_u 
 int match_delete __ARGS((win_T *wp, int id, int perr));
 void clear_matches __ARGS((win_T *wp));
 matchitem_T *get_match __ARGS((win_T *wp, int id));
-int get_win_number __ARGS((win_T *wp));
+int get_win_number __ARGS((win_T *wp, win_T *first_win));
+int get_tab_number __ARGS((tabpage_T *tp));
 /* vim: set ft=c : */
diff --git a/src/structs.h b/src/structs.h
--- a/src/structs.h
+++ b/src/structs.h
@@ -1759,6 +1759,14 @@ struct tabpage_S
     dictitem_T	    tp_winvar;	    /* variable for "t:" Dictionary */
     dict_T	    *tp_vars;	    /* internal variables, local to tab page */
 #endif
+
+#ifdef FEAT_PYTHON
+    void	    *tp_python_ref;	/* The Python value for this tab page */
+#endif
+
+#ifdef FEAT_PYTHON3
+    void	    *tp_python3_ref;	/* The Python value for this tab page */
+#endif
 };
 
 /*
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    949,
+/**/
     948,
 /**/
     947,
diff --git a/src/window.c b/src/window.c
--- a/src/window.c
+++ b/src/window.c
@@ -3510,6 +3510,15 @@ free_tabpage(tp)
     hash_init(&tp->tp_vars->dv_hashtab);
     unref_var_dict(tp->tp_vars);
 #endif
+
+#ifdef FEAT_PYTHON
+    python_tabpage_free(tp);
+#endif
+
+#ifdef FEAT_PYTHON3
+    python3_tabpage_free(tp);
+#endif
+
     vim_free(tp);
 }
 
@@ -6734,12 +6743,12 @@ get_match(wp, id)
 
 #if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) || defined(PROTO)
     int
-get_win_number(win_T *wp)
+get_win_number(win_T *wp, win_T *first_win)
 {
     int		i = 1;
     win_T	*w;
 
-    for (w = firstwin; w != NULL && w != wp; w = W_NEXT(w))
+    for (w = first_win; w != NULL && w != wp; w = W_NEXT(w))
 	++i;
 
     if (w == NULL)
@@ -6747,4 +6756,19 @@ get_win_number(win_T *wp)
     else
 	return i;
 }
-#endif
+
+    int
+get_tab_number(tabpage_T *tp)
+{
+    int		i = 1;
+    tabpage_T	*t;
+
+    for (t = first_tabpage; t != NULL && t != tp; t = t->tp_next)
+	++i;
+
+    if (t == NULL)
+	return 0;
+    else
+	return i;
+}
+#endif