widget/nsClipboardProxy.cpp
author Chris H-C <chutten@mozilla.com>
Mon, 04 Jul 2016 11:16:05 -0400
changeset 312997 df28918fe2361f0b54ca9ce4773a29c4c0675d06
parent 310949 564549c354b038a465c0b3fc245da3cab8753eab
child 318173 bd7461a1ed09447f4d38b4911f0e83933f9d875b
permissions -rw-r--r--
bug 1218576 - Support remote accumulation via JS histograms. r=gfritzsche The JS histograms, too, need to dispatch their accumulations from child to parent. JSHistograms_Add now only supports histograms that are in gHistogramsMap or that were created in the parent process. After bug 1288745, maybe we'll be able to change this to be less convoluted. MozReview-Commit-ID: 3qTH89YKbGP

/* 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 "mozilla/dom/ContentChild.h"
#include "mozilla/Unused.h"
#include "nsClipboardProxy.h"
#include "nsISupportsPrimitives.h"
#include "nsCOMPtr.h"
#include "nsComponentManagerUtils.h"
#include "nsXULAppAPI.h"
#include "nsContentUtils.h"
#include "nsStringStream.h"

using namespace mozilla;
using namespace mozilla::dom;

NS_IMPL_ISUPPORTS(nsClipboardProxy, nsIClipboard, nsIClipboardProxy)

nsClipboardProxy::nsClipboardProxy()
  : mClipboardCaps(false, false)
{
}

NS_IMETHODIMP
nsClipboardProxy::SetData(nsITransferable *aTransferable,
                          nsIClipboardOwner *anOwner, int32_t aWhichClipboard)
{
  ContentChild* child = ContentChild::GetSingleton();

  IPCDataTransfer ipcDataTransfer;
  nsContentUtils::TransferableToIPCTransferable(aTransferable, &ipcDataTransfer,
                                                false, child, nullptr);

  bool isPrivateData = false;
  aTransferable->GetIsPrivateData(&isPrivateData);
  nsCOMPtr<nsIPrincipal> requestingPrincipal;
  aTransferable->GetRequestingPrincipal(getter_AddRefs(requestingPrincipal));
  child->SendSetClipboard(ipcDataTransfer, isPrivateData,
                          IPC::Principal(requestingPrincipal), aWhichClipboard);

  return NS_OK;
}

NS_IMETHODIMP
nsClipboardProxy::GetData(nsITransferable *aTransferable, int32_t aWhichClipboard)
{
   nsTArray<nsCString> types;
  
  nsCOMPtr<nsISupportsArray> flavorList;
  aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
  if (flavorList) {
    uint32_t flavorCount = 0;
    flavorList->Count(&flavorCount);
    for (uint32_t j = 0; j < flavorCount; ++j) {
      nsCOMPtr<nsISupportsCString> flavor = do_QueryElementAt(flavorList, j);
      if (flavor) {
        nsAutoCString flavorStr;
        flavor->GetData(flavorStr);
        if (flavorStr.Length()) {
          types.AppendElement(flavorStr);
        }
      }
    }
  }

  nsresult rv;
  IPCDataTransfer dataTransfer;
  ContentChild::GetSingleton()->SendGetClipboard(types, aWhichClipboard, &dataTransfer);

  auto& items = dataTransfer.items();
  for (uint32_t j = 0; j < items.Length(); ++j) {
    const IPCDataTransferItem& item = items[j];

    if (item.data().type() == IPCDataTransferData::TnsString) {
      nsCOMPtr<nsISupportsString> dataWrapper =
        do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv);
      NS_ENSURE_SUCCESS(rv, rv);

      nsString data = item.data().get_nsString();
      rv = dataWrapper->SetData(data);
      NS_ENSURE_SUCCESS(rv, rv);

      rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper,
                                          data.Length() * sizeof(char16_t));
      NS_ENSURE_SUCCESS(rv, rv);
    } else if (item.data().type() == IPCDataTransferData::TShmem) {
      // If this is an image, convert it into an nsIInputStream.
      nsCString flavor = item.flavor();
      mozilla::ipc::Shmem data = item.data().get_Shmem();
      if (flavor.EqualsLiteral(kJPEGImageMime) ||
          flavor.EqualsLiteral(kJPGImageMime) ||
          flavor.EqualsLiteral(kPNGImageMime) ||
          flavor.EqualsLiteral(kGIFImageMime)) {
        nsCOMPtr<nsIInputStream> stream;

        NS_NewCStringInputStream(getter_AddRefs(stream),
                                 nsDependentCString(data.get<char>(), data.Size<char>()));

        rv = aTransferable->SetTransferData(flavor.get(), stream, sizeof(nsISupports*));
        NS_ENSURE_SUCCESS(rv, rv);
      } else if (flavor.EqualsLiteral(kNativeHTMLMime) ||
                 flavor.EqualsLiteral(kRTFMime) ||
                 flavor.EqualsLiteral(kCustomTypesMime)) {
        nsCOMPtr<nsISupportsCString> dataWrapper =
          do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
        NS_ENSURE_SUCCESS(rv, rv);

        rv = dataWrapper->SetData(nsDependentCString(data.get<char>(), data.Size<char>()));
        NS_ENSURE_SUCCESS(rv, rv);

        rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper,
                                            data.Size<char>());
        NS_ENSURE_SUCCESS(rv, rv);
      }

      mozilla::Unused << ContentChild::GetSingleton()->DeallocShmem(data);
    }
  }

  return NS_OK;
}

NS_IMETHODIMP
nsClipboardProxy::EmptyClipboard(int32_t aWhichClipboard)
{
  ContentChild::GetSingleton()->SendEmptyClipboard(aWhichClipboard);
  return NS_OK;
}

NS_IMETHODIMP
nsClipboardProxy::HasDataMatchingFlavors(const char **aFlavorList,
                                         uint32_t aLength, int32_t aWhichClipboard,
                                         bool *aHasType)
{
  *aHasType = false;

  nsTArray<nsCString> types;
  nsCString* t = types.AppendElements(aLength);
  for (uint32_t j = 0; j < aLength; ++j) {
    t[j].Rebind(aFlavorList[j], nsCharTraits<char>::length(aFlavorList[j]));
  }

  ContentChild::GetSingleton()->SendClipboardHasType(types, aWhichClipboard, aHasType);

  return NS_OK;
}

NS_IMETHODIMP
nsClipboardProxy::SupportsSelectionClipboard(bool *aIsSupported)
{
  *aIsSupported = mClipboardCaps.supportsSelectionClipboard();
  return NS_OK;
}


NS_IMETHODIMP
nsClipboardProxy::SupportsFindClipboard(bool *aIsSupported)
{
  *aIsSupported = mClipboardCaps.supportsFindClipboard();
  return NS_OK;
}

void
nsClipboardProxy::SetCapabilities(const ClipboardCapabilities& aClipboardCaps)
{
  mClipboardCaps = aClipboardCaps;
}