nsWrapperCache expects the object it stores to have an ObjectMoved op that will
notify the wrapper cache when the object is moved. SpiderMonkey promises don't
have a way to do this.
The XPCConvert changes are needed to allow code that passes around Promise
objects as nsISupports to continue working instead of ending up with
double-wrapped nsISupports (XPCWrappedNative for an nsISupports XPCWrappedJS)
around the SpiderMonkey Promise.
The bulk of this commit was generated with a script, executed at the top
level of a typical source code checkout. The only non-machine-generated
part was modifying MFBT's moz.build to reflect the new naming.
CLOSED TREE makes big refactorings like this a piece of cake.
# The main substitution.
find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \
xargs perl -p -i -e '
s/nsRefPtr\.h/RefPtr\.h/g; # handle includes
s/nsRefPtr ?</RefPtr</g; # handle declarations and variables
'
# Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h.
perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h
# Handle nsRefPtr.h itself, a couple places that define constructors
# from nsRefPtr, and code generators specially. We do this here, rather
# than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename
# things like nsRefPtrHashtable.
perl -p -i -e 's/nsRefPtr/RefPtr/g' \
mfbt/nsRefPtr.h \
xpcom/glue/nsCOMPtr.h \
xpcom/base/OwningNonNull.h \
ipc/ipdl/ipdl/lower.py \
ipc/ipdl/ipdl/builtin.py \
dom/bindings/Codegen.py \
python/lldbutils/lldbutils/utils.py
# In our indiscriminate substitution above, we renamed
# nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up.
find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \
xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g'
if [ -d .git ]; then
git mv mfbt/nsRefPtr.h mfbt/RefPtr.h
else
hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h
fi
--HG--
rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
This is implemented by creating a Promise object internally and
forwarding the .then() call to it. Any further callbacks passed to
future .then() calls will be added as callbacks on the same internal
promise object. We also take care of resolving or rejecting the promise
if the success/error event of the DOMRequest object has been fired
before .then() is called.
Without special handling CallbackObject subclasses will fall into the "nsISupports but not nsWrapperCache" case which goes through an XPConnect wrapping path that has no idea how to cope with a CallbackObject. We need both the CallbackObject overload and the EnableIf bit in the template because the template will bind to the subclass and thus be preferred to the CallbackObject overload which requires an implicit conversion to the base class.
Before this patch nsTArray<T*> will eventually try to ToJSValue a T* which will select the boolean overload. Thanks C++! The new template overload that takes a T and attempts to dereference it will be preferred because it can bind to the type directly and does not require the implicit (and terrible!) conversion to bool. This template is written in terms of T and not T* so we can test to see if T is a pointer type (and not merely something that can be coerced to a T*, such as a T[N]).
Apart from moving the methods, I made the following changes:
1) Renamed them to ToJSValue.
2) Inlined the boolean overload.
3) Added overloads that take integer types.
4) Changed the order of the aCx and aArgument arguments so aCx comes first.
5) Renamed "abv" to "obj" in the typed array overload.
