Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 319 insertions, 0 deletions

diff --git a/dom/fs/api/FileSystemHandle.cpp b/dom/fs/api/FileSystemHandle.cpp
new file mode 100644
index 0000000000..beca83d0bf
--- /dev/null
+++ b/dom/fs/api/FileSystemHandle.cpp
@@ -0,0 +1,319 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "FileSystemHandle.h"
+
+#include "FileSystemDirectoryHandle.h"
+#include "FileSystemFileHandle.h"
+#include "fs/FileSystemRequestHandler.h"
+#include "js/StructuredClone.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/FileSystemHandleBinding.h"
+#include "mozilla/dom/FileSystemLog.h"
+#include "mozilla/dom/FileSystemManager.h"
+#include "mozilla/dom/Promise-inl.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/StorageManager.h"
+#include "mozilla/dom/StructuredCloneHolder.h"
+#include "mozilla/dom/quota/QuotaCommon.h"
+#include "mozilla/ipc/PBackgroundSharedTypes.h"
+#include "nsJSPrincipals.h"
+#include "nsString.h"
+#include "prio.h"
+#include "private/pprio.h"
+#include "xpcpublic.h"
+
+namespace mozilla::dom {
+
+namespace {
+
+bool ConstructHandleMetadata(JSContext* aCx, nsIGlobalObject* aGlobal,
+                             JSStructuredCloneReader* aReader,
+                             const bool aDirectory,
+                             fs::FileSystemEntryMetadata& aMetadata) {
+  using namespace mozilla::dom::fs;
+
+  EntryId entryId;
+  if (!entryId.SetLength(32u, fallible)) {
+    return false;
+  }
+
+  if (!JS_ReadBytes(aReader, static_cast<void*>(entryId.BeginWriting()), 32u)) {
+    return false;
+  }
+
+  Name name;
+  if (!StructuredCloneHolder::ReadString(aReader, name)) {
+    return false;
+  }
+
+  mozilla::ipc::PrincipalInfo storageKey;
+  if (!nsJSPrincipals::ReadPrincipalInfo(aReader, storageKey)) {
+    return false;
+  }
+
+  QM_TRY_UNWRAP(auto hasEqualStorageKey,
+                aGlobal->HasEqualStorageKey(storageKey), false);
+
+  if (!hasEqualStorageKey) {
+    LOG(("Blocking deserialization of %s due to cross-origin",
+         NS_ConvertUTF16toUTF8(name).get()));
+    return false;
+  }
+
+  LOG_VERBOSE(("Deserializing %s", NS_ConvertUTF16toUTF8(name).get()));
+
+  aMetadata = fs::FileSystemEntryMetadata(entryId, name, aDirectory);
+  return true;
+}
+
+}  // namespace
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FileSystemHandle)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(FileSystemHandle)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(FileSystemHandle)
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(FileSystemHandle)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FileSystemHandle)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal)
+  // Don't unlink mManager!
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(FileSystemHandle)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mManager)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+FileSystemHandle::FileSystemHandle(
+    nsIGlobalObject* aGlobal, RefPtr<FileSystemManager>& aManager,
+    const fs::FileSystemEntryMetadata& aMetadata,
+    fs::FileSystemRequestHandler* aRequestHandler)
+    : mGlobal(aGlobal),
+      mManager(aManager),
+      mMetadata(aMetadata),
+      mRequestHandler(aRequestHandler) {
+  MOZ_ASSERT(!mMetadata.entryId().IsEmpty());
+}
+
+// WebIDL Boilerplate
+
+nsIGlobalObject* FileSystemHandle::GetParentObject() const { return mGlobal; }
+
+JSObject* FileSystemHandle::WrapObject(JSContext* aCx,
+                                       JS::Handle<JSObject*> aGivenProto) {
+  return FileSystemHandle_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+// WebIDL Interface
+
+void FileSystemHandle::GetName(nsAString& aResult) {
+  aResult = mMetadata.entryName();
+}
+
+already_AddRefed<Promise> FileSystemHandle::IsSameEntry(
+    FileSystemHandle& aOther, ErrorResult& aError) const {
+  RefPtr<Promise> promise = Promise::Create(GetParentObject(), aError);
+  if (aError.Failed()) {
+    return nullptr;
+  }
+
+  // Handles the case of "dir = createdir foo; removeEntry(foo); file =
+  // createfile foo; issameentry(dir, file)"
+  const bool result = mMetadata.entryId().Equals(aOther.mMetadata.entryId()) &&
+                      Kind() == aOther.Kind();
+  promise->MaybeResolve(result);
+
+  return promise.forget();
+}
+
+already_AddRefed<Promise> FileSystemHandle::Move(const nsAString& aName,
+                                                 ErrorResult& aError) {
+  LOG(("Move %s to %s", NS_ConvertUTF16toUTF8(mMetadata.entryName()).get(),
+       NS_ConvertUTF16toUTF8(aName).get()));
+
+  fs::EntryId parent;  // empty means same directory
+  return Move(parent, aName, aError);
+}
+
+already_AddRefed<Promise> FileSystemHandle::Move(
+    FileSystemDirectoryHandle& aParent, ErrorResult& aError) {
+  LOG(("Move %s to %s/%s", NS_ConvertUTF16toUTF8(mMetadata.entryName()).get(),
+       NS_ConvertUTF16toUTF8(aParent.mMetadata.entryName()).get(),
+       NS_ConvertUTF16toUTF8(mMetadata.entryName()).get()));
+  return Move(aParent, mMetadata.entryName(), aError);
+}
+
+already_AddRefed<Promise> FileSystemHandle::Move(
+    FileSystemDirectoryHandle& aParent, const nsAString& aName,
+    ErrorResult& aError) {
+  LOG(("Move %s to %s/%s", NS_ConvertUTF16toUTF8(mMetadata.entryName()).get(),
+       NS_ConvertUTF16toUTF8(aParent.mMetadata.entryName()).get(),
+       NS_ConvertUTF16toUTF8(aName).get()));
+  return Move(aParent.mMetadata.entryId(), aName, aError);
+}
+
+already_AddRefed<Promise> FileSystemHandle::Move(const fs::EntryId& aParentId,
+                                                 const nsAString& aName,
+                                                 ErrorResult& aError) {
+  RefPtr<Promise> promise = Promise::Create(GetParentObject(), aError);
+  if (aError.Failed()) {
+    return nullptr;
+  }
+
+  fs::Name name(aName);
+  if (!aParentId.IsEmpty()) {
+    fs::FileSystemChildMetadata newMetadata;
+    newMetadata.parentId() = aParentId;
+    newMetadata.childName() = aName;
+    mRequestHandler->MoveEntry(mManager, this, mMetadata, newMetadata, promise,
+                               aError);
+  } else {
+    mRequestHandler->RenameEntry(mManager, this, mMetadata, name, promise,
+                                 aError);
+  }
+  if (aError.Failed()) {
+    return nullptr;
+  }
+
+  // Other handles to this will be broken, and the spec is ok with this, but we
+  // need to update our EntryId and name
+  promise->AddCallbacksWithCycleCollectedArgs(
+      [name](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
+             FileSystemHandle* aHandle) {
+        // XXX Fix entryId!
+        LOG(("Changing FileSystemHandle name from %s to %s",
+             NS_ConvertUTF16toUTF8(aHandle->mMetadata.entryName()).get(),
+             NS_ConvertUTF16toUTF8(name).get()));
+        aHandle->mMetadata.entryName() = name;
+      },
+      [](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
+         FileSystemHandle* aHandle) {
+        LOG(("reject of move for %s",
+             NS_ConvertUTF16toUTF8(aHandle->mMetadata.entryName()).get()));
+      },
+      RefPtr(this));
+
+  return promise.forget();
+}
+
+// [Serializable] implementation
+
+// static
+already_AddRefed<FileSystemHandle> FileSystemHandle::ReadStructuredClone(
+    JSContext* aCx, nsIGlobalObject* aGlobal,
+    JSStructuredCloneReader* aReader) {
+  LOG_VERBOSE(("Reading File/DirectoryHandle"));
+
+  uint32_t kind = static_cast<uint32_t>(FileSystemHandleKind::EndGuard_);
+
+  if (!JS_ReadBytes(aReader, reinterpret_cast<void*>(&kind),
+                    sizeof(uint32_t))) {
+    return nullptr;
+  }
+
+  if (kind == static_cast<uint32_t>(FileSystemHandleKind::Directory)) {
+    RefPtr<FileSystemHandle> result =
+        FileSystemHandle::ConstructDirectoryHandle(aCx, aGlobal, aReader);
+    return result.forget();
+  }
+
+  if (kind == static_cast<uint32_t>(FileSystemHandleKind::File)) {
+    RefPtr<FileSystemHandle> result =
+        FileSystemHandle::ConstructFileHandle(aCx, aGlobal, aReader);
+    return result.forget();
+  }
+
+  return nullptr;
+}
+
+bool FileSystemHandle::WriteStructuredClone(
+    JSContext* aCx, JSStructuredCloneWriter* aWriter) const {
+  LOG_VERBOSE(("Writing File/DirectoryHandle"));
+  MOZ_ASSERT(mMetadata.entryId().Length() == 32);
+
+  auto kind = static_cast<uint32_t>(Kind());
+  if (NS_WARN_IF(!JS_WriteBytes(aWriter, static_cast<void*>(&kind),
+                                sizeof(uint32_t)))) {
+    return false;
+  }
+
+  if (NS_WARN_IF(!JS_WriteBytes(
+          aWriter, static_cast<const void*>(mMetadata.entryId().get()),
+          mMetadata.entryId().Length()))) {
+    return false;
+  }
+
+  if (!StructuredCloneHolder::WriteString(aWriter, mMetadata.entryName())) {
+    return false;
+  }
+
+  // Needed to make sure the destination nsIGlobalObject is from the same
+  // origin/principal
+  QM_TRY_INSPECT(const auto& storageKey, mGlobal->GetStorageKey(), false);
+
+  return nsJSPrincipals::WritePrincipalInfo(aWriter, storageKey);
+}
+
+// static
+already_AddRefed<FileSystemFileHandle> FileSystemHandle::ConstructFileHandle(
+    JSContext* aCx, nsIGlobalObject* aGlobal,
+    JSStructuredCloneReader* aReader) {
+  LOG(("Reading FileHandle"));
+
+  fs::FileSystemEntryMetadata metadata;
+  if (!ConstructHandleMetadata(aCx, aGlobal, aReader, /* aDirectory */ false,
+                               metadata)) {
+    return nullptr;
+  }
+
+  RefPtr<StorageManager> storageManager = aGlobal->GetStorageManager();
+  if (!storageManager) {
+    return nullptr;
+  }
+
+  // Note that the actor may not exist or may not be connected yet.
+  RefPtr<FileSystemManager> fileSystemManager =
+      storageManager->GetFileSystemManager();
+
+  RefPtr<FileSystemFileHandle> fsHandle =
+      new FileSystemFileHandle(aGlobal, fileSystemManager, metadata);
+
+  return fsHandle.forget();
+}
+
+// static
+already_AddRefed<FileSystemDirectoryHandle>
+FileSystemHandle::ConstructDirectoryHandle(JSContext* aCx,
+                                           nsIGlobalObject* aGlobal,
+                                           JSStructuredCloneReader* aReader) {
+  LOG(("Reading DirectoryHandle"));
+
+  fs::FileSystemEntryMetadata metadata;
+  if (!ConstructHandleMetadata(aCx, aGlobal, aReader, /* aDirectory */ true,
+                               metadata)) {
+    return nullptr;
+  }
+
+  RefPtr<StorageManager> storageManager = aGlobal->GetStorageManager();
+  if (!storageManager) {
+    return nullptr;
+  }
+
+  // Note that the actor may not exist or may not be connected yet.
+  RefPtr<FileSystemManager> fileSystemManager =
+      storageManager->GetFileSystemManager();
+
+  RefPtr<FileSystemDirectoryHandle> fsHandle =
+      new FileSystemDirectoryHandle(aGlobal, fileSystemManager, metadata);
+
+  return fsHandle.forget();
+}
+
+}  // namespace mozilla::dom