widget/nsClipboardProxy.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "mozilla/dom/ContentChild.h"
   6 #include "mozilla/Unused.h"
   7 #include "nsArrayUtils.h"
   8 #include "nsClipboardProxy.h"
   9 #include "nsISupportsPrimitives.h"
  10 #include "nsCOMPtr.h"
  11 #include "nsComponentManagerUtils.h"
  12 #include "nsXULAppAPI.h"
  13 #include "nsContentUtils.h"
  14 #include "nsStringStream.h"
  15
  16 using namespace mozilla;
  17 using namespace mozilla::dom;
  18
  19 NS_IMPL_ISUPPORTS(nsClipboardProxy, nsIClipboard, nsIClipboardProxy)
  20
  21 nsClipboardProxy::nsClipboardProxy()
  22   : mClipboardCaps(false, false)
  23 {
  24 }
  25
  26 NS_IMETHODIMP
  27 nsClipboardProxy::SetData(nsITransferable *aTransferable,
  28                           nsIClipboardOwner *anOwner, int32_t aWhichClipboard)
  29 {
  30   ContentChild* child = ContentChild::GetSingleton();
  31
  32   IPCDataTransfer ipcDataTransfer;
  33   nsContentUtils::TransferableToIPCTransferable(aTransferable, &ipcDataTransfer,
  34                                                 false, child, nullptr);
  35
  36   bool isPrivateData = false;
  37   aTransferable->GetIsPrivateData(&isPrivateData);
  38   nsCOMPtr<nsIPrincipal> requestingPrincipal;
  39   aTransferable->GetRequestingPrincipal(getter_AddRefs(requestingPrincipal));
  40   nsContentPolicyType contentPolicyType = nsIContentPolicy::TYPE_OTHER;
  41   aTransferable->GetContentPolicyType(&contentPolicyType);
  42   child->SendSetClipboard(ipcDataTransfer, isPrivateData,
  43                           IPC::Principal(requestingPrincipal),
  44                           contentPolicyType, aWhichClipboard);
  45
  46   return NS_OK;
  47 }
  48
  49 NS_IMETHODIMP
  50 nsClipboardProxy::GetData(nsITransferable *aTransferable, int32_t aWhichClipboard)
  51 {
  52    nsTArray<nsCString> types;
  53
  54   nsCOMPtr<nsIArray> flavorList;
  55   aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
  56   if (flavorList) {
  57     uint32_t flavorCount = 0;
  58     flavorList->GetLength(&flavorCount);
  59     for (uint32_t j = 0; j < flavorCount; ++j) {
  60       nsCOMPtr<nsISupportsCString> flavor = do_QueryElementAt(flavorList, j);
  61       if (flavor) {
  62         nsAutoCString flavorStr;
  63         flavor->GetData(flavorStr);
  64         if (flavorStr.Length()) {
  65           types.AppendElement(flavorStr);
  66         }
  67       }
  68     }
  69   }
  70
  71   nsresult rv;
  72   IPCDataTransfer dataTransfer;
  73   ContentChild::GetSingleton()->SendGetClipboard(types, aWhichClipboard, &dataTransfer);
  74
  75   auto& items = dataTransfer.items();
  76   for (uint32_t j = 0; j < items.Length(); ++j) {
  77     const IPCDataTransferItem& item = items[j];
  78
  79     if (item.data().type() == IPCDataTransferData::TnsString) {
  80       nsCOMPtr<nsISupportsString> dataWrapper =
  81         do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv);
  82       NS_ENSURE_SUCCESS(rv, rv);
  83
  84       const nsString& data = item.data().get_nsString();
  85       rv = dataWrapper->SetData(data);
  86       NS_ENSURE_SUCCESS(rv, rv);
  87
  88       rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper,
  89                                           data.Length() * sizeof(char16_t));
  90       NS_ENSURE_SUCCESS(rv, rv);
  91     } else if (item.data().type() == IPCDataTransferData::TShmem) {
  92       // If this is an image, convert it into an nsIInputStream.
  93       const nsCString& flavor = item.flavor();
  94       mozilla::ipc::Shmem data = item.data().get_Shmem();
  95       if (flavor.EqualsLiteral(kJPEGImageMime) ||
  96           flavor.EqualsLiteral(kJPGImageMime) ||
  97           flavor.EqualsLiteral(kPNGImageMime) ||
  98           flavor.EqualsLiteral(kGIFImageMime)) {
  99         nsCOMPtr<nsIInputStream> stream;
 100
 101         NS_NewCStringInputStream(getter_AddRefs(stream),
 102                                  nsDependentCSubstring(data.get<char>(), data.Size<char>()));
 103
 104         rv = aTransferable->SetTransferData(flavor.get(), stream, sizeof(nsISupports*));
 105         NS_ENSURE_SUCCESS(rv, rv);
 106       } else if (flavor.EqualsLiteral(kNativeHTMLMime) ||
 107                  flavor.EqualsLiteral(kRTFMime) ||
 108                  flavor.EqualsLiteral(kCustomTypesMime)) {
 109         nsCOMPtr<nsISupportsCString> dataWrapper =
 110           do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
 111         NS_ENSURE_SUCCESS(rv, rv);
 112
 113         rv = dataWrapper->SetData(nsDependentCSubstring(data.get<char>(), data.Size<char>()));
 114         NS_ENSURE_SUCCESS(rv, rv);
 115
 116         rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper,
 117                                             data.Size<char>());
 118         NS_ENSURE_SUCCESS(rv, rv);
 119       }
 120
 121       mozilla::Unused << ContentChild::GetSingleton()->DeallocShmem(data);
 122     }
 123   }
 124
 125   return NS_OK;
 126 }
 127
 128 NS_IMETHODIMP
 129 nsClipboardProxy::EmptyClipboard(int32_t aWhichClipboard)
 130 {
 131   ContentChild::GetSingleton()->SendEmptyClipboard(aWhichClipboard);
 132   return NS_OK;
 133 }
 134
 135 NS_IMETHODIMP
 136 nsClipboardProxy::HasDataMatchingFlavors(const char **aFlavorList,
 137                                          uint32_t aLength, int32_t aWhichClipboard,
 138                                          bool *aHasType)
 139 {
 140   *aHasType = false;
 141
 142   nsTArray<nsCString> types;
 143   nsCString* t = types.AppendElements(aLength);
 144   for (uint32_t j = 0; j < aLength; ++j) {
 145     t[j].Rebind(aFlavorList[j], nsCharTraits<char>::length(aFlavorList[j]));
 146   }
 147
 148   ContentChild::GetSingleton()->SendClipboardHasType(types, aWhichClipboard, aHasType);
 149
 150   return NS_OK;
 151 }
 152
 153 NS_IMETHODIMP
 154 nsClipboardProxy::SupportsSelectionClipboard(bool *aIsSupported)
 155 {
 156   *aIsSupported = mClipboardCaps.supportsSelectionClipboard();
 157   return NS_OK;
 158 }
 159
 160
 161 NS_IMETHODIMP
 162 nsClipboardProxy::SupportsFindClipboard(bool *aIsSupported)
 163 {
 164   *aIsSupported = mClipboardCaps.supportsFindClipboard();
 165   return NS_OK;
 166 }
 167
 168 void
 169 nsClipboardProxy::SetCapabilities(const ClipboardCapabilities& aClipboardCaps)
 170 {
 171   mClipboardCaps = aClipboardCaps;
 172 }