46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsDOMJSUtils_h__
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#define nsDOMJSUtils_h__
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#include "nsIScriptContext.h"
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#include "jsapi.h"
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class nsIJSArgArray;
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// seems like overkill for just this 1 function - but let's see what else
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// falls out first.
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inline nsIScriptContext *
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GetScriptContextFromJSContext(JSContext *cx)
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{
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if (!(JS::ContextOptionsRef(cx).privateIsNSISupports())) {
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return nullptr;
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}
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nsCOMPtr<nsIScriptContext> scx =
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do_QueryInterface(static_cast<nsISupports *>
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(::JS_GetContextPrivate(cx)));
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// This will return a pointer to something that's about to be
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// released, but that's ok here.
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return scx;
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}
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JSObject* GetDefaultScopeFromJSContext(JSContext *cx);
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// A factory function for turning a JS::Value argv into an nsIArray
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// but also supports an effecient way of extracting the original argv.
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// The resulting object will take a copy of the array, and ensure each
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// element is rooted.
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// Optionally, aArgv may be nullptr, in which case the array is allocated and
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// rooted, but all items remain nullptr. This presumably means the caller
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// will then QI us for nsIJSArgArray, and set our array elements.
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nsresult NS_CreateJSArgv(JSContext *aContext, uint32_t aArgc,
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const JS::Value* aArgv, nsIJSArgArray **aArray);
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#endif // nsDOMJSUtils_h__
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