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gecko/js/xpconnect/idl/nsIXPConnect.idl
Igor Bukanov 5542df3342 bug 730221 - delegating serialization of script principals to the embedding. r=:luke,:bz 
Currently to serialize principals stored in JSScript we have a rather complex
schema. First there is the transcode callback that the embedding must provide
to transcode principals using XDR API. Second we use rather complex glue code
to implement that callback in terms of writing/reading nsIObjectOutputStream/
nsIObjectInputStream. This glue code is duplicated in 3 places. All this can
be avoided if we simply delegate transcoding of principals to the caller. In
addition, at least in the case of the cached startup scripts we do not even
need to transcode the principals as the the cached scripts always have the
system principal so we can skip all the transcode complexity there.

The patch implemnts this idea. In particular, the code in JS engine
responsible for transcoding of principals is replaced by the single API
function JS_XDRSetPrincipals that the embedding can use to set principals for
decoded scripts and functions. Then the startup cache uses this to set the
principals for the decoded script to the system principals. The other two
places in nsJSContext::Serialize and  XBL_SerializeFunction that need to
serialize principals together with a function or script now uses common
utilities in nsXPConnect so the serialization complexity resides in the single
 place.
2012-02-13 14:10:04 +01:00

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/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* John Bandhauer <jband@netscape.com> (original author)
* Nate Nielsen <nielsen@memberwebs.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* The core XPConnect public interfaces. */
#include "nsISupports.idl"
#include "nsIClassInfo.idl"
#include "xpccomponents.idl"
#include "xpcjsid.idl"
#include "xpcexception.idl"
#include "nsIInterfaceInfo.idl"
#include "nsIInterfaceInfoManager.idl"
#include "nsIExceptionService.idl"
#include "nsIVariant.idl"
#include "nsIObjectOutputStream.idl"
#include "nsIObjectInputStream.idl"
%{ C++
#include "jspubtd.h"
#include "xptinfo.h"
#include "nsAXPCNativeCallContext.h"
class nsWrapperCache;
%}
/***************************************************************************/
// NB: jsval and jsid are declared in nsIVariant.idl
[ptr] native JSContextPtr(JSContext);
[ptr] native JSClassPtr(JSClass);
[ptr] native JSObjectPtr(JSObject);
[ptr] native JSValPtr(jsval);
[ptr] native JSValConstPtr(const jsval);
native JSPropertyOp(JSPropertyOp);
native JSEqualityOp(JSEqualityOp);
[ptr] native JSScriptPtr(JSScript);
[ptr] native voidPtrPtr(void*);
[ptr] native nsScriptObjectTracerPtr(nsScriptObjectTracer);
[ref] native nsCCTraversalCallbackRef(nsCycleCollectionTraversalCallback);
[ptr] native nsAXPCNativeCallContextPtr(nsAXPCNativeCallContext);
[ptr] native nsWrapperCachePtr(nsWrapperCache);
/***************************************************************************/
%{ C++
/***************************************************************************/
#define GENERATE_XPC_FAILURE(x) \
(NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_XPCONNECT,x))
#define NS_ERROR_XPC_NOT_ENOUGH_ARGS GENERATE_XPC_FAILURE( 1)
#define NS_ERROR_XPC_NEED_OUT_OBJECT GENERATE_XPC_FAILURE( 2)
#define NS_ERROR_XPC_CANT_SET_OUT_VAL GENERATE_XPC_FAILURE( 3)
#define NS_ERROR_XPC_NATIVE_RETURNED_FAILURE GENERATE_XPC_FAILURE( 4)
#define NS_ERROR_XPC_CANT_GET_INTERFACE_INFO GENERATE_XPC_FAILURE( 5)
#define NS_ERROR_XPC_CANT_GET_PARAM_IFACE_INFO GENERATE_XPC_FAILURE( 6)
#define NS_ERROR_XPC_CANT_GET_METHOD_INFO GENERATE_XPC_FAILURE( 7)
#define NS_ERROR_XPC_UNEXPECTED GENERATE_XPC_FAILURE( 8)
#define NS_ERROR_XPC_BAD_CONVERT_JS GENERATE_XPC_FAILURE( 9)
#define NS_ERROR_XPC_BAD_CONVERT_NATIVE GENERATE_XPC_FAILURE(10)
#define NS_ERROR_XPC_BAD_CONVERT_JS_NULL_REF GENERATE_XPC_FAILURE(11)
#define NS_ERROR_XPC_BAD_OP_ON_WN_PROTO GENERATE_XPC_FAILURE(12)
#define NS_ERROR_XPC_CANT_CONVERT_WN_TO_FUN GENERATE_XPC_FAILURE(13)
#define NS_ERROR_XPC_CANT_DEFINE_PROP_ON_WN GENERATE_XPC_FAILURE(14)
#define NS_ERROR_XPC_CANT_WATCH_WN_STATIC GENERATE_XPC_FAILURE(15)
#define NS_ERROR_XPC_CANT_EXPORT_WN_STATIC GENERATE_XPC_FAILURE(16)
#define NS_ERROR_XPC_SCRIPTABLE_CALL_FAILED GENERATE_XPC_FAILURE(17)
#define NS_ERROR_XPC_SCRIPTABLE_CTOR_FAILED GENERATE_XPC_FAILURE(18)
#define NS_ERROR_XPC_CANT_CALL_WO_SCRIPTABLE GENERATE_XPC_FAILURE(19)
#define NS_ERROR_XPC_CANT_CTOR_WO_SCRIPTABLE GENERATE_XPC_FAILURE(20)
#define NS_ERROR_XPC_CI_RETURNED_FAILURE GENERATE_XPC_FAILURE(21)
#define NS_ERROR_XPC_GS_RETURNED_FAILURE GENERATE_XPC_FAILURE(22)
#define NS_ERROR_XPC_BAD_CID GENERATE_XPC_FAILURE(23)
#define NS_ERROR_XPC_BAD_IID GENERATE_XPC_FAILURE(24)
#define NS_ERROR_XPC_CANT_CREATE_WN GENERATE_XPC_FAILURE(25)
#define NS_ERROR_XPC_JS_THREW_EXCEPTION GENERATE_XPC_FAILURE(26)
#define NS_ERROR_XPC_JS_THREW_NATIVE_OBJECT GENERATE_XPC_FAILURE(27)
#define NS_ERROR_XPC_JS_THREW_JS_OBJECT GENERATE_XPC_FAILURE(28)
#define NS_ERROR_XPC_JS_THREW_NULL GENERATE_XPC_FAILURE(29)
#define NS_ERROR_XPC_JS_THREW_STRING GENERATE_XPC_FAILURE(30)
#define NS_ERROR_XPC_JS_THREW_NUMBER GENERATE_XPC_FAILURE(31)
#define NS_ERROR_XPC_JAVASCRIPT_ERROR GENERATE_XPC_FAILURE(32)
#define NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS GENERATE_XPC_FAILURE(33)
#define NS_ERROR_XPC_CANT_CONVERT_PRIMITIVE_TO_ARRAY GENERATE_XPC_FAILURE(34)
#define NS_ERROR_XPC_CANT_CONVERT_OBJECT_TO_ARRAY GENERATE_XPC_FAILURE(35)
#define NS_ERROR_XPC_NOT_ENOUGH_ELEMENTS_IN_ARRAY GENERATE_XPC_FAILURE(36)
#define NS_ERROR_XPC_CANT_GET_ARRAY_INFO GENERATE_XPC_FAILURE(37)
#define NS_ERROR_XPC_NOT_ENOUGH_CHARS_IN_STRING GENERATE_XPC_FAILURE(38)
#define NS_ERROR_XPC_SECURITY_MANAGER_VETO GENERATE_XPC_FAILURE(39)
#define NS_ERROR_XPC_INTERFACE_NOT_SCRIPTABLE GENERATE_XPC_FAILURE(40)
#define NS_ERROR_XPC_INTERFACE_NOT_FROM_NSISUPPORTS GENERATE_XPC_FAILURE(41)
#define NS_ERROR_XPC_CANT_GET_JSOBJECT_OF_DOM_OBJECT GENERATE_XPC_FAILURE(42)
#define NS_ERROR_XPC_CANT_SET_READ_ONLY_CONSTANT GENERATE_XPC_FAILURE(43)
#define NS_ERROR_XPC_CANT_SET_READ_ONLY_ATTRIBUTE GENERATE_XPC_FAILURE(44)
#define NS_ERROR_XPC_CANT_SET_READ_ONLY_METHOD GENERATE_XPC_FAILURE(45)
#define NS_ERROR_XPC_CANT_ADD_PROP_TO_WRAPPED_NATIVE GENERATE_XPC_FAILURE(46)
#define NS_ERROR_XPC_CALL_TO_SCRIPTABLE_FAILED GENERATE_XPC_FAILURE(47)
#define NS_ERROR_XPC_JSOBJECT_HAS_NO_FUNCTION_NAMED GENERATE_XPC_FAILURE(48)
#define NS_ERROR_XPC_BAD_ID_STRING GENERATE_XPC_FAILURE(49)
#define NS_ERROR_XPC_BAD_INITIALIZER_NAME GENERATE_XPC_FAILURE(50)
#define NS_ERROR_XPC_HAS_BEEN_SHUTDOWN GENERATE_XPC_FAILURE(51)
#define NS_ERROR_XPC_CANT_MODIFY_PROP_ON_WN GENERATE_XPC_FAILURE(52)
#define NS_ERROR_XPC_BAD_CONVERT_JS_ZERO_ISNOT_NULL GENERATE_XPC_FAILURE(53)
// any new errors here should have an associated entry added in xpc.msg
/***************************************************************************/
%}
/***************************************************************************/
// forward declarations...
interface nsIXPCScriptable;
interface nsIXPConnect;
interface nsIXPConnectWrappedNative;
interface nsIInterfaceInfo;
interface nsIXPCSecurityManager;
interface nsIPrincipal;
%{C++
class nsCycleCollectionTraversalCallback;
class nsScriptObjectTracer;
%}
/***************************************************************************/
[uuid(8916a320-d118-11d3-8f3a-0010a4e73d9a)]
interface nsIXPConnectJSObjectHolder : nsISupports
{
readonly attribute JSObjectPtr JSObject;
};
[uuid(f819a95a-6ab5-4a02-bda6-32861e859581)]
interface nsIXPConnectWrappedNative : nsIXPConnectJSObjectHolder
{
/* attribute 'JSObject' inherited from nsIXPConnectJSObjectHolder */
readonly attribute nsISupports Native;
readonly attribute JSObjectPtr JSObjectPrototype;
/**
* These are here as an aid to nsIXPCScriptable implementors
*/
readonly attribute nsIXPConnect XPConnect;
nsIInterfaceInfo FindInterfaceWithMember(in jsid nameID);
nsIInterfaceInfo FindInterfaceWithName(in jsid nameID);
void debugDump(in short depth);
/*
* This finishes initializing a wrapped global, doing the parts that we
* couldn't do while the global and window were being simultaneously
* bootstrapped. This should be called exactly once, and only for wrapped
* globals.
*/
void finishInitForWrappedGlobal();
/*
* This returns a pointer into the instance and care should be taken
* to make sure the pointer is not kept past the life time of the
* object it points into.
*/
voidPtrPtr GetSecurityInfoAddress();
/*
* NOTE: Add new IDL methods _before_ the C++ block below if you
* add them. Otherwise the vtable won't be what xpidl thinks it
* is, since GetObjectPrincipal() is virtual.
*/
%{C++
/**
* Faster access to the native object from C++. Will never return null.
*/
nsISupports* Native() const { return mIdentity; }
protected:
nsISupports *mIdentity;
public:
%}
};
%{C++
#include "nsCOMPtr.h"
inline
const nsQueryInterface
do_QueryWrappedNative(nsIXPConnectWrappedNative *aWrappedNative)
{
return nsQueryInterface(aWrappedNative->Native());
}
inline
const nsQueryInterfaceWithError
do_QueryWrappedNative(nsIXPConnectWrappedNative *aWrappedNative,
nsresult *aError)
{
return nsQueryInterfaceWithError(aWrappedNative->Native(), aError);
}
%}
[uuid(BED52030-BCA6-11d2-BA79-00805F8A5DD7)]
interface nsIXPConnectWrappedJS : nsIXPConnectJSObjectHolder
{
/* attribute 'JSObject' inherited from nsIXPConnectJSObjectHolder */
readonly attribute nsIInterfaceInfo InterfaceInfo;
readonly attribute nsIIDPtr InterfaceIID;
void debugDump(in short depth);
void aggregatedQueryInterface(in nsIIDRef uuid,
[iid_is(uuid),retval] out nsQIResult result);
};
/***************************************************************************/
/**
* This is a sort of a placeholder interface. It is not intended to be
* implemented. It exists to give the nsIXPCSecurityManager an iid on
* which to gate a specific activity in XPConnect.
*
* That activity is...
*
* When JavaScript code uses a component that is itself implemented in
* JavaScript then XPConnect will build a wrapper rather than directly
* expose the JSObject of the component. This allows components implemented
* in JavaScript to 'look' just like any other xpcom component (from the
* perspective of the JavaScript caller). This insulates the component from
* the caller and hides any properties or methods that are not part of the
* interface as declared in xpidl. Usually this is a good thing.
*
* However, in some cases it is useful to allow the JS caller access to the
* JS component's underlying implementation. In order to facilitate this
* XPConnect supports the 'wrappedJSObject' property. The caller code can do:
*
* // 'foo' is some xpcom component (that might be implemented in JS).
* try {
* var bar = foo.wrappedJSObject;
* if(bar) {
* // bar is the underlying JSObject. Do stuff with it here.
* }
* } catch(e) {
* // security exception?
* }
*
* Recall that 'foo' above is an XPConnect wrapper, not the underlying JS
* object. The property get "foo.wrappedJSObject" will only succeed if three
* conditions are met:
*
* 1) 'foo' really is an XPConnect wrapper around a JSObject.
* 2) The underlying JSObject actually implements a "wrappedJSObject"
* property that returns a JSObject. This is called by XPConnect. This
* restriction allows wrapped objects to only allow access to the underlying
* JSObject if they choose to do so. Ususally this just means that 'foo'
* would have a property tht looks like:
* this.wrappedJSObject = this.
* 3) The implemementation of nsIXPCSecurityManager (if installed) allows
* a property get on the interface below. Although the JSObject need not
* implement 'nsIXPCWrappedJSObjectGetter', XPConnect will ask the
* security manager if it is OK for the caller to access the only method
* in nsIXPCWrappedJSObjectGetter before allowing the activity. This fits
* in with the security manager paradigm and makes control over accessing
* the property on this interface the control factor for getting the
* underlying wrapped JSObject of a JS component from JS code.
*
* Notes:
*
* a) If 'foo' above were the underlying JSObject and not a wrapper at all,
* then this all just works and XPConnect is not part of the picture at all.
* b) One might ask why 'foo' should not just implement an interface through
* which callers might get at the underlying object. There are three reasons:
* i) XPConnect would still have to do magic since JSObject is not a
* scriptable type.
* ii) JS Components might use aggregation (like C++ objects) and have
* different JSObjects for different interfaces 'within' an aggregate
* object. But, using an additional interface only allows returning one
* underlying JSObject. However, this allows for the possibility that
* each of the aggregte JSObjects could return something different.
* Note that one might do: this.wrappedJSObject = someOtherObject;
* iii) Avoiding the explicit interface makes it easier for both the caller
* and the component.
*
* Anyway, some future implementation of nsIXPCSecurityManager might want
* do special processing on 'nsIXPCSecurityManager::CanGetProperty' when
* the interface id is that of nsIXPCWrappedJSObjectGetter.
*/
[scriptable, uuid(254bb2e0-6439-11d4-8fe0-0010a4e73d9a)]
interface nsIXPCWrappedJSObjectGetter : nsISupports
{
readonly attribute nsISupports neverCalled;
};
/***************************************************************************/
/*
* This interface is implemented by outside code and registered with xpconnect
* via nsIXPConnect::setFunctionThisTranslator.
*
* The reason this exists is to support calls to JavaScript event callbacks
* needed by the DOM via xpconnect from C++ code.
*
* We've added support for wrapping JS function objects as xpcom interfaces
* by declaring the given interface as a [function] interface. However, to
* support the requirements of JS event callbacks we need to call the JS
* function with the 'this' set as the JSObject for which the event is being
* fired; e.g. a form node.
*
* We've decided that for all cases we care about the appropriate 'this' object
* can be derived from the first param in the call to the callback. In the
* event handler case the first param is an event object.
*
* Though we can't change all the JS code so that it would setup its own 'this',
* we can add plugin 'helper' support to xpconnect. And that is what we have
* here.
*
* The idea is that at startup time some code that cares about this issue
* (e.g. the DOM helper code) can register a nsIXPCFunctionThisTranslator
* object with xpconnect to handle calls to [function] interfaces of a given
* iid. When xpconnect goes to invoke a method on a wrapped JSObject for
* an interface marked as [function], xpconnect will check if the first param
* of the method is an xpcom object pointer and if so it will check to see if a
* nsIXPCFunctionThisTranslator has been registered for the given iid of the
* interface being called. If so it will call the translator and get an
* interface pointer to use as the 'this' for the call. If the translator
* returns a non-null interface pointer (which it should then have addref'd
* since it is being returned as an out param), xpconnect will attempt to build
* a wrapper around the pointer and get a JSObject from that wrapper to use
* as the 'this' for the call.
*
* If a null interface pointer is returned then xpconnect will use the default
* 'this' - the same JSObject as the function object it is calling.
*
* The translator can also return a non-null aIIDOfResult to tell xpconnect what
* type of wrapper to build. If that is null then xpconnect will assume the
* wrapper should be for nsISupports. For objects that support flattening -
* i.e. expose nsIClassInfo and that interface's getInterfaces method - then
* a flattened wrapper will be created and no iid was really necessary.
*
* XXX aHideFirstParamFromJS is intended to allow the trimming of that first
* param (used to indicate 'this') from the actual call to the JS code. The JS
* DOM does not require this functionality and it is **NOT YET IMPLEMENTED**
*
*/
[uuid(039ef260-2a0d-11d5-90a7-0010a4e73d9a)]
interface nsIXPCFunctionThisTranslator : nsISupports
{
nsISupports TranslateThis(in nsISupports aInitialThis,
in nsIInterfaceInfo aInterfaceInfo,
in PRUint16 aMethodIndex,
out boolean aHideFirstParamFromJS,
out nsIIDPtr aIIDOfResult);
};
/***************************************************************************/
%{ C++
// For use with the service manager
// {CB6593E0-F9B2-11d2-BDD6-000064657374}
#define NS_XPCONNECT_CID \
{ 0xcb6593e0, 0xf9b2, 0x11d2, \
{ 0xbd, 0xd6, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74 } }
enum nsGCType {
nsGCNormal,
nsGCShrinking,
nsGCIncremental
};
%}
[uuid(08ad2253-3ed6-40ed-beec-6472f2d8dc7f)]
interface nsIXPConnect : nsISupports
{
%{ C++
NS_DEFINE_STATIC_CID_ACCESSOR(NS_XPCONNECT_CID)
%}
/**
* Initializes classes on a global object that has already been created.
*/
void
initClasses(in JSContextPtr aJSContext,
in JSObjectPtr aGlobalJSObj);
/**
* Creates a new global object using the given aCOMObj as the global
* object. The object will be set up according to the flags (defined
* below). If you do not pass INIT_JS_STANDARD_CLASSES, then aCOMObj
* must implement nsIXPCScriptable so it can resolve the standard
* classes when asked by the JS engine.
*
* @param aJSContext the context to use while creating the global object.
* @param aCOMObj the native object that represents the global object.
* @param aPrincipal the principal of the code that will run in this
* compartment. Can be null if not on the main thread.
* @param aFlags one of the flags below specifying what options this
* global object wants.
*/
nsIXPConnectJSObjectHolder
initClassesWithNewWrappedGlobal(
in JSContextPtr aJSContext,
in nsISupports aCOMObj,
in nsIPrincipal aPrincipal,
in PRUint32 aFlags);
const PRUint32 INIT_JS_STANDARD_CLASSES = 1 << 0;
const PRUint32 FLAG_SYSTEM_GLOBAL_OBJECT = 1 << 1;
const PRUint32 OMIT_COMPONENTS_OBJECT = 1 << 2;
/**
* wrapNative will create a new JSObject or return an existing one.
*
* The JSObject is returned inside a refcounted nsIXPConnectJSObjectHolder.
* As long as this holder is held the JSObject will be protected from
* collection by JavaScript's garbage collector. It is a good idea to
* transfer the JSObject to some equally protected place before releasing
* the holder (i.e. use JS_SetProperty to make this object a property of
* some other JSObject).
*
* This method now correctly deals with cases where the passed in xpcom
* object already has an associated JSObject for the cases:
* 1) The xpcom object has already been wrapped for use in the same scope
* as an nsIXPConnectWrappedNative.
* 2) The xpcom object is in fact a nsIXPConnectWrappedJS and thus already
* has an underlying JSObject.
* 3) The xpcom object implements nsIScriptObjectOwner; i.e. is an idlc
* style DOM object for which we can call GetScriptObject to get the
* JSObject it uses to represent itself into JavaScript.
*
* It *might* be possible to QueryInterface the nsIXPConnectJSObjectHolder
* returned by the method into a nsIXPConnectWrappedNative or a
* nsIXPConnectWrappedJS.
*
* This method will never wrap the JSObject involved in an
* XPCNativeWrapper before returning.
*
* Returns:
* success:
* NS_OK
* failure:
* NS_ERROR_XPC_BAD_CONVERT_NATIVE
* NS_ERROR_XPC_CANT_GET_JSOBJECT_OF_DOM_OBJECT
* NS_ERROR_FAILURE
*/
nsIXPConnectJSObjectHolder
wrapNative(in JSContextPtr aJSContext,
in JSObjectPtr aScope,
in nsISupports aCOMObj,
in nsIIDRef aIID);
/**
* Same as wrapNative, but also returns the JSObject in aVal. C++ callers
* can pass in null for the aHolder argument, but in that case they must
* ensure that aVal is rooted.
* aIID may be null, it means the same as passing in
* &NS_GET_IID(nsISupports) but when passing in null certain shortcuts
* can be taken because we know without comparing IIDs that the caller is
* asking for an nsISupports wrapper.
* If aAllowWrapper, then the returned value will be wrapped in the proper
* type of security wrapper on top of the XPCWrappedNative (if needed).
* This method doesn't push aJSContext on the context stack, so the caller
* is required to push it if the top of the context stack is not equal to
* aJSContext.
*/
void
wrapNativeToJSVal(in JSContextPtr aJSContext,
in JSObjectPtr aScope,
in nsISupports aCOMObj,
in nsWrapperCachePtr aCache,
in nsIIDPtr aIID,
in boolean aAllowWrapper,
out jsval aVal,
out nsIXPConnectJSObjectHolder aHolder);
/**
* wrapJS will yield a new or previously existing xpcom interface pointer
* to represent the JSObject passed in.
*
* This method now correctly deals with cases where the passed in JSObject
* already has an associated xpcom interface for the cases:
* 1) The JSObject has already been wrapped as a nsIXPConnectWrappedJS.
* 2) The JSObject is in fact a nsIXPConnectWrappedNative and thus already
* has an underlying xpcom object.
* 3) The JSObject is of a jsclass which supports getting the nsISupports
* from the JSObject directly. This is used for idlc style objects
* (e.g. DOM objects).
*
* It *might* be possible to QueryInterface the resulting interface pointer
* to nsIXPConnectWrappedJS.
*
* Returns:
* success:
* NS_OK
* failure:
* NS_ERROR_XPC_BAD_CONVERT_JS
* NS_ERROR_FAILURE
*/
void
wrapJS(in JSContextPtr aJSContext,
in JSObjectPtr aJSObj,
in nsIIDRef aIID,
[iid_is(aIID),retval] out nsQIResult result);
/**
* Wraps the given jsval in a nsIVariant and returns the new variant.
*/
nsIVariant
jSValToVariant(in JSContextPtr cx, in JSValPtr aJSVal);
/**
* This only succeeds if the JSObject is a nsIXPConnectWrappedNative.
* A new wrapper is *never* constructed.
*/
nsIXPConnectWrappedNative
getWrappedNativeOfJSObject(in JSContextPtr aJSContext,
in JSObjectPtr aJSObj);
[noscript, notxpcom] nsISupports
getNativeOfWrapper(in JSContextPtr aJSContext,
in JSObjectPtr aJSObj);
JSObjectPtr
getJSObjectOfWrapper(in JSContextPtr aJSContext,
in JSObjectPtr aJSObj);
void setSecurityManagerForJSContext(in JSContextPtr aJSContext,
in nsIXPCSecurityManager aManager,
in PRUint16 flags);
void getSecurityManagerForJSContext(in JSContextPtr aJSContext,
out nsIXPCSecurityManager aManager,
out PRUint16 flags);
/**
* The security manager to use when the current JSContext has no security
* manager.
*/
void setDefaultSecurityManager(in nsIXPCSecurityManager aManager,
in PRUint16 flags);
void getDefaultSecurityManager(out nsIXPCSecurityManager aManager,
out PRUint16 flags);
nsIStackFrame
createStackFrameLocation(in PRUint32 aLanguage,
in string aFilename,
in string aFunctionName,
in PRInt32 aLineNumber,
in nsIStackFrame aCaller);
/**
* @deprecated do-nothing function.
*/
[deprecated] void syncJSContexts();
readonly attribute nsIStackFrame CurrentJSStack;
readonly attribute nsAXPCNativeCallContextPtr CurrentNativeCallContext;
/* pass nsnull to clear pending exception */
attribute nsIException PendingException;
void debugDump(in short depth);
void debugDumpObject(in nsISupports aCOMObj, in short depth);
void debugDumpJSStack(in boolean showArgs,
in boolean showLocals,
in boolean showThisProps);
void debugDumpEvalInJSStackFrame(in PRUint32 aFrameNumber,
in string aSourceText);
/**
* wrapJSAggregatedToNative is just like wrapJS except it is used in cases
* where the JSObject is also aggregated to some native xpcom Object.
* At present XBL is the only system that might want to do this.
*
* XXX write more!
*
* Returns:
* success:
* NS_OK
* failure:
* NS_ERROR_XPC_BAD_CONVERT_JS
* NS_ERROR_FAILURE
*/
void
wrapJSAggregatedToNative(in nsISupports aOuter,
in JSContextPtr aJSContext,
in JSObjectPtr aJSObj,
in nsIIDRef aIID,
[iid_is(aIID),retval] out nsQIResult result);
// Methods added since mozilla 0.6....
/**
* This only succeeds if the native object is already wrapped by xpconnect.
* A new wrapper is *never* constructed.
*/
nsIXPConnectWrappedNative
getWrappedNativeOfNativeObject(in JSContextPtr aJSContext,
in JSObjectPtr aScope,
in nsISupports aCOMObj,
in nsIIDRef aIID);
nsIXPCFunctionThisTranslator
getFunctionThisTranslator(in nsIIDRef aIID);
nsIXPCFunctionThisTranslator
setFunctionThisTranslator(in nsIIDRef aIID,
in nsIXPCFunctionThisTranslator aTranslator);
nsIXPConnectJSObjectHolder
reparentWrappedNativeIfFound(in JSContextPtr aJSContext,
in JSObjectPtr aScope,
in JSObjectPtr aNewParent,
in nsISupports aCOMObj);
void
moveWrappers(in JSContextPtr aJSContext,
in JSObjectPtr aOldScope,
in JSObjectPtr aNewScope);
void clearAllWrappedNativeSecurityPolicies();
nsIXPConnectJSObjectHolder
getWrappedNativePrototype(in JSContextPtr aJSContext,
in JSObjectPtr aScope,
in nsIClassInfo aClassInfo);
void releaseJSContext(in JSContextPtr aJSContext, in boolean noGC);
jsval variantToJS(in JSContextPtr ctx, in JSObjectPtr scope, in nsIVariant value);
nsIVariant JSToVariant(in JSContextPtr ctx, in jsval value);
/**
* Create a sandbox for evaluating code in isolation using
* evalInSandboxObject().
*
* @param cx A context to use when creating the sandbox object.
* @param principal The principal (or NULL to use the null principal)
* to use when evaluating code in this sandbox.
*/
[noscript] nsIXPConnectJSObjectHolder createSandbox(in JSContextPtr cx,
in nsIPrincipal principal);
/**
* Evaluate script in a sandbox, completely isolated from all
* other running scripts.
*
* @param source The source of the script to evaluate.
* @param cx The context to use when setting up the evaluation of
* the script. The actual evaluation will happen on a new
* temporary context.
* @param sandbox The sandbox object to evaluate the script in.
* @param returnStringOnly The only results to come out of the
* computation (including exceptions) will
* be coerced into strings created in the
* sandbox.
* @return The result of the evaluation as a jsval. If the caller
* intends to use the return value from this call the caller
* is responsible for rooting the jsval before making a call
* to this method.
*/
[noscript] jsval evalInSandboxObject(in AString source, in JSContextPtr cx,
in nsIXPConnectJSObjectHolder sandbox,
in boolean returnStringOnly);
/**
* Root JS objects held by aHolder.
* @param aHolder The object that hold the JS objects that should be rooted.
* @param aTrace The tracer for aHolder.
*/
[noscript] void addJSHolder(in voidPtr aHolder,
in nsScriptObjectTracerPtr aTracer);
/**
* Stop rooting the JS objects held by aHolder.
* @param aHolder The object that hold the rooted JS objects.
*/
[noscript] void removeJSHolder(in voidPtr aHolder);
/**
* Note aJSContext as a child to the cycle collector.
* @param aJSContext The JSContext to note.
* @param aCb The cycle collection traversal callback.
*/
[noscript,notxpcom] void noteJSContext(in JSContextPtr aJSContext,
in nsCCTraversalCallbackRef aCb);
/**
* Whether or not XPConnect should report all JS exceptions when returning
* from JS into C++. False by default, although any value set in the
* MOZ_REPORT_ALL_JS_EXCEPTIONS environment variable will override the value
* passed here.
*/
void setReportAllJSExceptions(in boolean reportAllJSExceptions);
/**
* Trigger a JS garbage collection.
* Use a js::gcreason::Reason from jsfriendapi.h for the kind.
* Use the nsGCType enum for the kind.
*/
void GarbageCollect(in PRUint32 reason, in PRUint32 kind);
/**
* Signals a good place to do an incremental GC slice, because the
* browser is drawing a frame.
*/
void NotifyDidPaint();
/**
* Define quick stubs on the given object, @a proto.
*
* @param cx
* A context. Requires request.
* @param proto
* The (newly created) prototype object for a DOM class. The JS half
* of an XPCWrappedNativeProto.
* @param flags
* Property flags for the quick stub properties--should be either
* JSPROP_ENUMERATE or 0.
* @param interfaceCount
* The number of interfaces the class implements.
* @param interfaceArray
* The interfaces the class implements; interfaceArray and
* interfaceCount are like what nsIClassInfo.getInterfaces returns.
*/
[noscript,notxpcom] boolean defineDOMQuickStubs(
in JSContextPtr cx,
in JSObjectPtr proto,
in PRUint32 flags,
in PRUint32 interfaceCount,
[array, size_is(interfaceCount)] in nsIIDPtr interfaceArray);
%{C++
/**
* Get the object principal for this wrapper. Note that this may well end
* up being null; in that case one should seek principals elsewhere. Null
* here does NOT indicate system principal or no principals at all, just
* that this wrapper doesn't have an intrinsic one.
*/
virtual nsIPrincipal* GetPrincipal(JSObject* obj,
bool allowShortCircuit) const = 0;
virtual char* DebugPrintJSStack(bool showArgs,
bool showLocals,
bool showThisProps) = 0;
%}
/**
* Creates a JS object holder around aObject that will hold the object
* alive for as long as the holder stays alive.
*/
nsIXPConnectJSObjectHolder holdObject(in JSContextPtr aJSContext,
in JSObjectPtr aObject);
/**
* Return the caller object of the current call from JS.
*/
[noscript,notxpcom] void getCaller(out JSContextPtr aJSContext,
out JSObjectPtr aObject);
/**
* When we place the browser in JS debug mode, there can't be any
* JS on the stack. This is because we currently activate debugMode
* on all scripts in the JSRuntime when the debugger is activated.
* This method will turn debug mode on or off when the context
* stack reaches zero length.
*/
[noscript] void setDebugModeWhenPossible(in boolean mode,
in boolean allowSyncDisable);
[noscript] void writeScript(in nsIObjectOutputStream aStream,
in JSContextPtr aJSContext,
in JSScriptPtr aJSScript);
[noscript] JSScriptPtr readScript(in nsIObjectInputStream aStream,
in JSContextPtr aJSContext);
[noscript] void writeFunction(in nsIObjectOutputStream aStream,
in JSContextPtr aJSContext,
in JSObjectPtr aJSObject);
[noscript] JSObjectPtr readFunction(in nsIObjectInputStream aStream,
in JSContextPtr aJSContext);
};
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