1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/base/nsDOMJSUtils.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,46 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifndef nsDOMJSUtils_h__
1.9 +#define nsDOMJSUtils_h__
1.10 +
1.11 +#include "nsIScriptContext.h"
1.12 +#include "jsapi.h"
1.13 +
1.14 +class nsIJSArgArray;
1.15 +
1.16 +// seems like overkill for just this 1 function - but let's see what else
1.17 +// falls out first.
1.18 +inline nsIScriptContext *
1.19 +GetScriptContextFromJSContext(JSContext *cx)
1.20 +{
1.21 + if (!(JS::ContextOptionsRef(cx).privateIsNSISupports())) {
1.22 + return nullptr;
1.23 + }
1.24 +
1.25 + nsCOMPtr<nsIScriptContext> scx =
1.26 + do_QueryInterface(static_cast<nsISupports *>
1.27 + (::JS_GetContextPrivate(cx)));
1.28 +
1.29 + // This will return a pointer to something that's about to be
1.30 + // released, but that's ok here.
1.31 + return scx;
1.32 +}
1.33 +
1.34 +JSObject* GetDefaultScopeFromJSContext(JSContext *cx);
1.35 +
1.36 +// A factory function for turning a JS::Value argv into an nsIArray
1.37 +// but also supports an effecient way of extracting the original argv.
1.38 +// Bug 312003 describes why this must be "void *", but argv will be cast to
1.39 +// JS::Value* and the args are found at:
1.40 +// ((JS::Value*)aArgv)[0], ..., ((JS::Value*)aArgv)[aArgc - 1]
1.41 +// The resulting object will take a copy of the array, and ensure each
1.42 +// element is rooted.
1.43 +// Optionally, aArgv may be nullptr, in which case the array is allocated and
1.44 +// rooted, but all items remain nullptr. This presumably means the caller
1.45 +// will then QI us for nsIJSArgArray, and set our array elements.
1.46 +nsresult NS_CreateJSArgv(JSContext *aContext, uint32_t aArgc, void *aArgv,
1.47 + nsIJSArgArray **aArray);
1.48 +
1.49 +#endif // nsDOMJSUtils_h__
