gecko-dev/widget/nsClipboardProxy.cpp
Nathan Froyd dd84912fd6 Bug 1225923 - part 4 - fix AppendElement(nsDependentCString(...)) call in nsClipboardProxy.cpp; r=roc
I think the intent of this call is not to copy the flavor data passed
in, but to simply convert it to a friendlier nsCString container for
serializing to an IPC message.  Since we won't be retaining references
to the passed-in strings after this function returns, we can make the
elements of our temporary array actually dependent strings, rather than
creating temporary dependent strings that would need to be copied into
the array.
2015-11-18 10:55:41 -05:00

160 lines
4.9 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/. */
#include "mozilla/dom/ContentChild.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);
child->SendSetClipboard(ipcDataTransfer, isPrivateData, 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::TnsCString) {
// If this is an image, convert it into an nsIInputStream.
nsCString flavor = item.flavor();
if (flavor.EqualsLiteral(kJPEGImageMime) ||
flavor.EqualsLiteral(kJPGImageMime) ||
flavor.EqualsLiteral(kPNGImageMime) ||
flavor.EqualsLiteral(kGIFImageMime)) {
nsCOMPtr<nsIInputStream> stream;
NS_NewCStringInputStream(getter_AddRefs(stream), item.data().get_nsCString());
rv = aTransferable->SetTransferData(flavor.get(), stream, sizeof(nsISupports*));
NS_ENSURE_SUCCESS(rv, rv);
} else if (flavor.EqualsLiteral(kNativeHTMLMime) ||
flavor.EqualsLiteral(kRTFMime)) {
nsCOMPtr<nsISupportsCString> dataWrapper =
do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCString data = item.data().get_nsCString();
rv = dataWrapper->SetData(data);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper,
data.Length());
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
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;
}