Currently, in order to retrieve supported clipboard formats
DataTransfer::CacheExternalClipboardFormats repeatedly makes the same calls to
clipboard->HasDataMatchingFlavors.
In the case when aPlainTextOnly == true only 1 call is made -
clipboard->HasDataMatchingFlavors(kUnicodeMime, ...), and when
aPlainTextOnly == false we have 1 call made for every member of the list
{ kCustomTypesMime, kFileMime, kHTMLMime, kRTFMime, kURLMime, kURLDataMime,
kUnicodeMime, kPNGImageMime } - a total of 8 calls.
We can see that in nsClipboardProxy::HasDataMatchingFlavors, there is a call to
ContentChild::GetSingleton()->SendClipboardHasType.
So when aPlainTextOnly == true, we will have 1 sync message, and when
aPlainTextOnly == false, we will have 8 sync messages.
With the proposed solution, in DataTransfer::CacheExternalClipboardFormats
we will only have 1 sync message regardless of the case because
GetExternalClipboardFormats() will retrieve all supported clipboard
formats at once.
MozReview-Commit-ID: CAmBfqB459v
--HG--
extra : rebase_source : 27f1b420f2613e6a747ed63762f1583ab71ba3e0
Deleted the old Chrome DataTransfer constructor because it was only used
for some tests which can be easily changed. Added a new constructor that
is not Chrome Only.
MozReview-Commit-ID: HjcgafSiWfM
We could have used the new NS_NewCStringInputStream overload here, but
it seemed nicer to directly transfer ownership into the newly-created
stream. If we're going to be more efficient here, we might as well go
as far as when can without making the code too ugly.
On Mac, when dragging an image, add the image request's MIME type to
the transfer so that the MIME-extension check can be done in the
parent process to avoid content sandboxing issues.
MozReview-Commit-ID: 3cb4fCr6GnL
--HG--
extra : rebase_source : 43720237b467765401b5504c57bbc1b43d4dfdc0
When dragging an image, add the image request's MIME type to the transfer
so that the MIME-extension check can be done in the parent process.
Move the MIME-extension check to the parent process to avoid
issues caused by content process sandboxing.
MozReview-Commit-ID: 3cb4fCr6GnL
--HG--
extra : rebase_source : ec49b8c83613be844fe4cd88a5024ac41a845199
(Path is actually r=froydnj.)
Bug 1400459 devirtualized nsIAtom so that it is no longer a subclass of
nsISupports. This means that nsAtom is now a better name for it than nsIAtom.
MozReview-Commit-ID: 91U22X2NydP
--HG--
rename : xpcom/ds/nsIAtom.h => xpcom/ds/nsAtom.h
extra : rebase_source : ac3e904a21b8b48e74534fff964f1623ee937c67
This patch merges nsAtom into nsIAtom. For the moment, both names can be used
interchangeably due to a typedef. The patch also devirtualizes nsIAtom, by
making it not inherit from nsISupports, removing NS_DECL_NSIATOM, and dropping
the use of NS_IMETHOD_. It also removes nsIAtom's IIDs.
These changes trigger knock-on changes throughout the codebase, changing the
types of lots of things as follows.
- nsCOMPtr<nsIAtom> --> RefPtr<nsIAtom>
- nsCOMArray<nsIAtom> --> nsTArray<RefPtr<nsIAtom>>
- Count() --> Length()
- ObjectAt() --> ElementAt()
- AppendObject() --> AppendElement()
- RemoveObjectAt() --> RemoveElementAt()
- ns*Hashtable<nsISupportsHashKey, ...> -->
ns*Hashtable<nsRefPtrHashKey<nsIAtom>, ...>
- nsInterfaceHashtable<T, nsIAtom> --> nsRefPtrHashtable<T, nsIAtom>
- This requires adding a Get() method to nsRefPtrHashtable that it lacks but
nsInterfaceHashtable has.
- nsCOMPtr<nsIMutableArray> --> nsTArray<RefPtr<nsIAtom>>
- nsArrayBase::Create() --> nsTArray()
- GetLength() --> Length()
- do_QueryElementAt() --> operator[]
The patch also has some changes to Rust code that manipulates nsIAtom.
MozReview-Commit-ID: DykOl8aEnUJ
--HG--
extra : rebase_source : 254404e318e94b4c93ec8d4081ff0f0fda8aa7d1
This isn't a super essential feature, and is just a change to try to bring us in
line with chromium and the spec. As this has apparent web compat issues, and
DataTransfer is a hard to test area, this patch moves the changes behind a pref,
which we can come back to turning on after we ship 57.
When dragging a `draggable=true` HTML DOM node, if no data is added to the
DataTransfer during the DragStart event, we currently cancel the drag. This is
inconsistent with Chrome's behaviour.
This patch adds a chrome-only (hidden from content) item to the DataTransfer:
application/x-moz-dummy-data. This data is added only when no other data has
been added to the DataTransfer, and the target of the dragstart event was a
draggable=true HTML DOM node.
This hidden node allows for the drag event to complete successfully, while
appearing the same as Chrome's behavior to content scripts.
MozReview-Commit-ID: HVqEr7aR6DD
