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comparison: dom/base/nsDOMJSUtils.h
dom/base/nsDOMJSUtils.h
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef nsDOMJSUtils_h__ | |
| 6 #define nsDOMJSUtils_h__ | |
| 7 | |
| 8 #include "nsIScriptContext.h" | |
| 9 #include "jsapi.h" | |
| 10 | |
| 11 class nsIJSArgArray; | |
| 12 | |
| 13 // seems like overkill for just this 1 function - but let's see what else | |
| 14 // falls out first. | |
| 15 inline nsIScriptContext * | |
| 16 GetScriptContextFromJSContext(JSContext *cx) | |
| 17 { | |
| 18 if (!(JS::ContextOptionsRef(cx).privateIsNSISupports())) { | |
| 19 return nullptr; | |
| 20 } | |
| 21 | |
| 22 nsCOMPtr<nsIScriptContext> scx = | |
| 23 do_QueryInterface(static_cast<nsISupports *> | |
| 24 (::JS_GetContextPrivate(cx))); | |
| 25 | |
| 26 // This will return a pointer to something that's about to be | |
| 27 // released, but that's ok here. | |
| 28 return scx; | |
| 29 } | |
| 30 | |
| 31 JSObject* GetDefaultScopeFromJSContext(JSContext *cx); | |
| 32 | |
| 33 // A factory function for turning a JS::Value argv into an nsIArray | |
| 34 // but also supports an effecient way of extracting the original argv. | |
| 35 // Bug 312003 describes why this must be "void *", but argv will be cast to | |
| 36 // JS::Value* and the args are found at: | |
| 37 // ((JS::Value*)aArgv)[0], ..., ((JS::Value*)aArgv)[aArgc - 1] | |
| 38 // The resulting object will take a copy of the array, and ensure each | |
| 39 // element is rooted. | |
| 40 // Optionally, aArgv may be nullptr, in which case the array is allocated and | |
| 41 // rooted, but all items remain nullptr. This presumably means the caller | |
| 42 // will then QI us for nsIJSArgArray, and set our array elements. | |
| 43 nsresult NS_CreateJSArgv(JSContext *aContext, uint32_t aArgc, void *aArgv, | |
| 44 nsIJSArgArray **aArray); | |
| 45 | |
| 46 #endif // nsDOMJSUtils_h__ |
