Source code

Revision control

Other Tools

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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/. */
#include "nsDragServiceProxy.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/BrowserChild.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "nsContentUtils.h"
using mozilla::CSSIntRegion;
using mozilla::LayoutDeviceIntRect;
using mozilla::Maybe;
using mozilla::Nothing;
using mozilla::Some;
using mozilla::dom::BrowserChild;
using mozilla::gfx::DataSourceSurface;
using mozilla::gfx::SourceSurface;
using mozilla::gfx::SurfaceFormat;
using mozilla::ipc::Shmem;
nsDragServiceProxy::nsDragServiceProxy() = default;
nsDragServiceProxy::~nsDragServiceProxy() = default;
nsresult nsDragServiceProxy::InvokeDragSessionImpl(
nsIArray* aArrayTransferables, const Maybe<CSSIntRegion>& aRegion,
uint32_t aActionType) {
NS_ENSURE_STATE(mSourceDocument->GetDocShell());
BrowserChild* child = BrowserChild::GetFrom(mSourceDocument->GetDocShell());
NS_ENSURE_STATE(child);
nsTArray<mozilla::dom::IPCDataTransfer> dataTransfers;
nsContentUtils::TransferablesToIPCTransferables(
aArrayTransferables, dataTransfers, false, child->Manager(), nullptr);
nsCOMPtr<nsIPrincipal> principal;
if (mSourceNode) {
principal = mSourceNode->NodePrincipal();
}
nsCOMPtr<nsIContentSecurityPolicy> csp;
if (mSourceDocument) {
csp = mSourceDocument->GetCsp();
}
LayoutDeviceIntRect dragRect;
if (mHasImage || mSelection) {
nsPresContext* pc;
RefPtr<SourceSurface> surface;
DrawDrag(mSourceNode, aRegion, mScreenPosition, &dragRect, &surface, &pc);
if (surface) {
RefPtr<DataSourceSurface> dataSurface = surface->GetDataSurface();
if (dataSurface) {
size_t length;
int32_t stride;
Maybe<Shmem> maybeShm = nsContentUtils::GetSurfaceData(
dataSurface, &length, &stride, child);
if (maybeShm.isNothing()) {
return NS_ERROR_FAILURE;
}
auto surfaceData = maybeShm.value();
// Save the surface data to shared memory.
if (!surfaceData.IsReadable() || !surfaceData.get<char>()) {
NS_WARNING("Failed to create shared memory for drag session.");
return NS_ERROR_FAILURE;
}
mozilla::Unused << child->SendInvokeDragSession(
dataTransfers, aActionType, Some(std::move(surfaceData)), stride,
dataSurface->GetFormat(), dragRect, principal, csp);
StartDragSession();
return NS_OK;
}
}
}
mozilla::Unused << child->SendInvokeDragSession(
dataTransfers, aActionType, Nothing(), 0, static_cast<SurfaceFormat>(0),
dragRect, principal, csp);
StartDragSession();
return NS_OK;
}