gecko-dev/dom/events/RemoteDragStartData.h
Simon Giesecke 58d0171406 Bug 1620632 - Ensure nsTArray_Impl only declares a copy-constructor/assignment operator if E is copy-constructible. r=froydnj
To correctly implement this, it must be known on instantiation whether E is
copy-constructible, which is not the case if only a forward declaration is
available. This can be resolved either by making sure a full definition of E is
available, which is preferable. But in cases where this is not (easily) possible,
the information can be explicitly provided by the MOZ_DECLARE_COPY_CONSTRUCTIBLE
and MOZ_DECLARE_NON_COPY_CONSTRUCTIBLE macros. In particular, declarations for
IPDL-declared types are added to nsTArray.h itself, like it was already done
for MOZ_DECLARE_RELOCATE_USING_MOVE_CONSTRUCTOR.

Differential Revision: https://phabricator.services.mozilla.com/D66244

--HG--
extra : moz-landing-system : lando
2020-03-20 17:13:51 +00:00

65 lines
1.9 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_RemoteDragStartData_h
#define mozilla_dom_RemoteDragStartData_h
#include "nsCOMPtr.h"
#include "nsRect.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/gfx/DataSurfaceHelpers.h"
namespace mozilla {
namespace dom {
class IPCDataTransferItem;
class BrowserParent;
/**
* This class is used to hold information about a drag
* when a drag begins in a content process.
*/
class RemoteDragStartData {
public:
NS_INLINE_DECL_REFCOUNTING(RemoteDragStartData)
RemoteDragStartData(BrowserParent* aBrowserParent,
nsTArray<IPCDataTransfer>&& aDataTransfer,
const LayoutDeviceIntRect& aRect,
nsIPrincipal* aPrincipal, nsIContentSecurityPolicy* aCsp);
void SetVisualization(
already_AddRefed<gfx::DataSourceSurface> aVisualization) {
mVisualization = aVisualization;
}
// Get the drag image and rectangle, clearing it from this
// RemoteDragStartData in the process.
already_AddRefed<mozilla::gfx::SourceSurface> TakeVisualization(
LayoutDeviceIntRect* aRect) {
*aRect = mRect;
return mVisualization.forget();
}
void AddInitialDnDDataTo(DataTransfer* aDataTransfer,
nsIPrincipal** aPrincipal,
nsIContentSecurityPolicy** aCsp);
private:
virtual ~RemoteDragStartData();
RefPtr<BrowserParent> mBrowserParent;
nsTArray<IPCDataTransfer> mDataTransfer;
const LayoutDeviceIntRect mRect;
nsCOMPtr<nsIPrincipal> mPrincipal;
nsCOMPtr<nsIContentSecurityPolicy> mCsp;
RefPtr<mozilla::gfx::SourceSurface> mVisualization;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_RemoteDragStartData_h