The Tor Browser: dom/base/nsDOMJSUtils.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     5 #ifndef nsDOMJSUtils_h__

     6 #define nsDOMJSUtils_h__

     8 #include "nsIScriptContext.h"

     9 #include "jsapi.h"

    11 class nsIJSArgArray;

    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   }

    22   nsCOMPtr<nsIScriptContext> scx =

    23     do_QueryInterface(static_cast<nsISupports *>

    24                                  (::JS_GetContextPrivate(cx)));

    26   // This will return a pointer to something that's about to be

    27   // released, but that's ok here.

    28   return scx;

    29 }

    31 JSObject* GetDefaultScopeFromJSContext(JSContext *cx);

    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);

    46 #endif // nsDOMJSUtils_h__

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