First cut at the Python implementation of nsIScriptContext etc (see

http://wiki.mozilla.org/Breaking_the_grip_JS_has_on_the_DOM).

See also bug 255942 - "Support other scripting languages than JS".

Not part of the build - indeed this will not build at all until bug
255942 lands, or the latest patch there is applied.


git-svn-id: svn://10.0.0.236/trunk@195705 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/extensions/python/dom/src/nsPyArgArray.cpp

@@ -0,0 +1,131 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is mozilla.org.
+ * Portions created by the Initial Developer are Copyright (C) 2005
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  Mark Hammond (original author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK *****
+ */
+
+#include "nsPyDOM.h"
+#include "nsIArray.h"
+
+class nsPyArgArray : public nsIPyArgArray, public nsIArray {
+public:
+  nsPyArgArray(PyObject *ob);
+  ~nsPyArgArray();
+  // nsISupports
+  NS_DECL_ISUPPORTS
+
+  // nsIArray
+  NS_DECL_NSIARRAY
+
+  // nsIPyArgArray
+  PyObject *GetArgs() {return mObject;}
+protected:
+  PyObject *mObject;
+};
+
+nsPyArgArray::nsPyArgArray(PyObject *ob) :
+    mObject(ob)
+{
+  NS_ASSERTION(PySequence_Check(ob), "You won't get far without a sequence!");
+  Py_INCREF(ob);
+}
+
+nsPyArgArray::~nsPyArgArray()
+{
+  Py_DECREF(mObject);
+}
+
+// QueryInterface implementation for nsPyArgArray
+NS_INTERFACE_MAP_BEGIN(nsPyArgArray)
+  NS_INTERFACE_MAP_ENTRY(nsIArray)
+  NS_INTERFACE_MAP_ENTRY(nsIPyArgArray)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPyArgArray)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(nsPyArgArray)
+NS_IMPL_RELEASE(nsPyArgArray)
+
+// nsIArray impl
+NS_IMETHODIMP nsPyArgArray::GetLength(PRUint32 *aLength)
+{
+  CEnterLeavePython _celp;
+  int size = PySequence_Length(mObject);
+  if (size==-1) {
+    return PyXPCOM_SetCOMErrorFromPyException();
+  }
+  *aLength = (PRUint32) size;
+  return NS_OK;
+}
+
+/* void queryElementAt (in unsigned long index, in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result); */
+NS_IMETHODIMP nsPyArgArray::QueryElementAt(PRUint32 index, const nsIID & uuid, void * *result)
+{
+  *result = nsnull;
+  // for now let Python check index validity.  Probably won't get the correct
+  // hresult, but its not even clear what that is :)
+
+  if (uuid.Equals(NS_GET_IID(nsIVariant)) || uuid.Equals(NS_GET_IID(nsISupports))) {
+    CEnterLeavePython _celp;
+    PyObject *sub = PySequence_GetItem(mObject, index);
+    if (sub==NULL) {
+        return PyXPCOM_SetCOMErrorFromPyException();
+    }
+    nsresult rv = PyObject_AsVariant(sub, (nsIVariant **)result);
+    Py_DECREF(sub);
+    return rv;
+  }
+  NS_WARNING("nsPyArgArray only handles nsIVariant");
+  return NS_ERROR_NO_INTERFACE;
+}
+
+/* unsigned long indexOf (in unsigned long startIndex, in nsISupports element); */
+NS_IMETHODIMP nsPyArgArray::IndexOf(PRUint32 startIndex, nsISupports *element, PRUint32 *_retval)
+{
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+/* nsISimpleEnumerator enumerate (); */
+NS_IMETHODIMP nsPyArgArray::Enumerate(nsISimpleEnumerator **_retval)
+{
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+// The factory function
+nsresult NS_CreatePyArgv(PyObject *ob, nsIArray **aArray)
+{
+  nsPyArgArray *ret = new nsPyArgArray(ob);
+  if (ret == nsnull)
+    return NS_ERROR_OUT_OF_MEMORY;
+  return ret->QueryInterface(NS_GET_IID(nsIArray), (void **)aArray);
+}