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https://github.com/mozilla/gecko-dev.git
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ef9c82db1e
DOM: getting rid of JS_GetContextPrivate wherever possible. Use static parent links where we can. When we do need to find this info about the caller we call a function that knows how to get that info rather than inline calls to JS_GetContextPrivate. This is all required for calling DOM objects on non-DOM JSContexts as we do via xpconnect. XPConnect: basic refactoring work to disassociate wrappers from the JSContext that was active when the wrapper was constructed. This allows for calling into wrapped JS objects on the right JSContext and for proper grouping of wrapped native objects so that they can share proto objects. This also allows for better sharing of objects and lays the foundations for threadsafety and interface flattening. Also, xpconnect tests are reorganized and improved. fixes bugs: 13419, 17736, 17746, 17952, 22086 r=vidur r=mccabe r=norris r=cbegle a=chofmann
122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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/* A namespace class for static layout utilities. */
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#include "jsapi.h"
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#include "nsCOMPtr.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIScriptContext.h"
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#include "nsLayoutUtils.h"
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// static
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nsresult
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nsLayoutUtils::GetStaticScriptGlobal(JSContext* aContext,
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JSObject* aObj,
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nsIScriptGlobalObject** aNativeGlobal)
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{
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nsISupports* supports;
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JSClass* clazz;
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JSObject* parent;
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JSObject* glob = aObj; // starting point for search
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if (!glob)
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return NS_ERROR_FAILURE;
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while (nsnull != (parent = JS_GetParent(aContext, glob)))
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glob = parent;
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#ifdef JS_THREADSAFE
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clazz = JS_GetClass(aContext, glob);
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#else
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clazz = JS_GetClass(glob);
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#endif
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if (!clazz ||
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!(clazz->flags & JSCLASS_HAS_PRIVATE) ||
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!(clazz->flags & JSCLASS_PRIVATE_IS_NSISUPPORTS) ||
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!(supports = (nsISupports*) JS_GetPrivate(aContext, glob))) {
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return NS_ERROR_FAILURE;
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}
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return supports->QueryInterface(NS_GET_IID(nsIScriptGlobalObject),
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(void**) aNativeGlobal);
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}
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//static
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nsresult
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nsLayoutUtils::GetStaticScriptContext(JSContext* aContext,
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JSObject* aObj,
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nsIScriptContext** aScriptContext)
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{
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nsCOMPtr<nsIScriptGlobalObject> nativeGlobal;
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GetStaticScriptGlobal(aContext, aObj, getter_AddRefs(nativeGlobal));
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if (!nativeGlobal)
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return NS_ERROR_FAILURE;
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nsIScriptContext* scriptContext = nsnull;
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nativeGlobal->GetContext(&scriptContext);
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*aScriptContext = scriptContext;
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return scriptContext ? NS_OK : NS_ERROR_FAILURE;
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}
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//static
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nsresult
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nsLayoutUtils::GetDynamicScriptGlobal(JSContext* aContext,
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nsIScriptGlobalObject** aNativeGlobal)
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{
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nsIScriptGlobalObject* nativeGlobal = nsnull;
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nsCOMPtr<nsIScriptContext> scriptCX;
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GetDynamicScriptContext(aContext, getter_AddRefs(scriptCX));
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if (scriptCX) {
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*aNativeGlobal = nativeGlobal = scriptCX->GetGlobalObject();
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}
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return nativeGlobal ? NS_OK : NS_ERROR_FAILURE;
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}
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//static
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nsresult
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nsLayoutUtils::GetDynamicScriptContext(JSContext *aContext,
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nsIScriptContext** aScriptContext)
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{
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// XXX We rely on the rule that if any JSContext in our JSRuntime has a
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// private set then that private *must* be a pointer to an nsISupports.
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nsISupports *supports = (nsIScriptContext*) JS_GetContextPrivate(aContext);
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if (!supports)
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return nsnull;
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return supports->QueryInterface(NS_GET_IID(nsIScriptContext),
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(void**)aScriptContext);
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}
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