author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 452502 32f94b7a8db69e3ab86135182fe8e43ea6926767
child 462243 1c4fb23363e0fca41931986561ff580c129eaa6e
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- 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 "nsISupportsPrimitives.h"
#include "mozilla/dom/TabChild.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::dom::OptionalShmem;
using mozilla::dom::TabChild;
using mozilla::gfx::DataSourceSurface;
using mozilla::gfx::SourceSurface;
using mozilla::gfx::SurfaceFormat;
using mozilla::ipc::Shmem;

nsDragServiceProxy::nsDragServiceProxy() {}

nsDragServiceProxy::~nsDragServiceProxy() {}

nsresult nsDragServiceProxy::InvokeDragSessionImpl(
    nsIArray* aArrayTransferables, const Maybe<CSSIntRegion>& aRegion,
    uint32_t aActionType) {
  TabChild* child = TabChild::GetFrom(mSourceDocument->GetDocShell());
  nsTArray<mozilla::dom::IPCDataTransfer> dataTransfers;
      aArrayTransferables, dataTransfers, false, child->Manager(), nullptr);

  nsCOMPtr<nsIPrincipal> principal;
  if (mSourceNode) {
    principal = mSourceNode->NodePrincipal();

  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, surfaceData, stride,
            dataSurface->GetFormat(), dragRect, IPC::Principal(principal));
        return NS_OK;

  mozilla::Unused << child->SendInvokeDragSession(
      dataTransfers, aActionType, mozilla::void_t(), 0,
      static_cast<SurfaceFormat>(0), dragRect, IPC::Principal(principal));
  return NS_OK;