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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/events/DataTransferItemList.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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diff --git a/dom/events/DataTransferItemList.h b/dom/events/DataTransferItemList.h
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+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#ifndef mozilla_dom_DataTransferItemList_h
+#define mozilla_dom_DataTransferItemList_h
+
+#include "mozilla/dom/DataTransfer.h"
+#include "mozilla/dom/DataTransferItem.h"
+#include "mozilla/dom/FileList.h"
+
+namespace mozilla {
+namespace dom {
+
+class DataTransferItem;
+
+class DataTransferItemList final : public nsISupports
+ , public nsWrapperCache
+{
+public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DataTransferItemList);
+
+ DataTransferItemList(DataTransfer* aDataTransfer, bool aIsExternal)
+ : mDataTransfer(aDataTransfer)
+ , mIsExternal(aIsExternal)
+ {
+ MOZ_ASSERT(aDataTransfer);
+ // We always allocate an index 0 in our DataTransferItemList. This is done
+ // in order to maintain the invariants according to the spec. Mainly, within
+ // the spec's list, there is intended to be a single copy of each mime type,
+ // for string typed items. File typed items are allowed to have duplicates.
+ // In the old moz* system, this was modeled by having multiple indexes, each
+ // of which was independent. Files were fetched from all indexes, but
+ // strings were only fetched from the first index. In order to maintain this
+ // correlation and avoid breaking code with the new changes, index 0 is now
+ // always present and used to store strings, and all file items are given
+ // their own index starting at index 1.
+ mIndexedItems.SetLength(1);
+ }
+
+ already_AddRefed<DataTransferItemList> Clone(DataTransfer* aDataTransfer) const;
+
+ virtual JSObject* WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) override;
+
+ uint32_t Length() const
+ {
+ return mItems.Length();
+ };
+
+ DataTransferItem* Add(const nsAString& aData, const nsAString& aType,
+ nsIPrincipal& aSubjectPrincipal,
+ ErrorResult& rv);
+ DataTransferItem* Add(File& aData,
+ nsIPrincipal& aSubjectPrincipal,
+ ErrorResult& aRv);
+
+ void Remove(uint32_t aIndex,
+ nsIPrincipal& aSubjectPrincipal,
+ ErrorResult& aRv);
+
+ DataTransferItem* IndexedGetter(uint32_t aIndex, bool& aFound) const;
+
+ DataTransfer* GetParentObject() const
+ {
+ return mDataTransfer;
+ }
+
+ void Clear(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv);
+
+ already_AddRefed<DataTransferItem>
+ SetDataWithPrincipal(const nsAString& aType, nsIVariant* aData,
+ uint32_t aIndex, nsIPrincipal* aPrincipal,
+ bool aInsertOnly, bool aHidden, ErrorResult& aRv);
+
+ already_AddRefed<FileList> Files(nsIPrincipal* aPrincipal);
+
+ // Moz-style helper methods for interacting with the stored data
+ void MozRemoveByTypeAt(const nsAString& aType, uint32_t aIndex,
+ nsIPrincipal& aSubjectPrincipal,
+ ErrorResult& aRv);
+ DataTransferItem* MozItemByTypeAt(const nsAString& aType, uint32_t aIndex);
+ const nsTArray<RefPtr<DataTransferItem>>* MozItemsAt(uint32_t aIndex);
+ uint32_t MozItemCount() const;
+
+ // Causes everything in indexes above 0 to shift down one index.
+ void PopIndexZero();
+
+ // Delete every item in the DataTransferItemList, without checking for
+ // permissions or read-only status (for internal use only).
+ void ClearAllItems();
+
+private:
+ void ClearDataHelper(DataTransferItem* aItem, uint32_t aIndexHint,
+ uint32_t aMozOffsetHint,
+ nsIPrincipal& aSubjectPrincipal,
+ ErrorResult& aRv);
+ DataTransferItem* AppendNewItem(uint32_t aIndex, const nsAString& aType,
+ nsIVariant* aData, nsIPrincipal* aPrincipal,
+ bool aHidden);
+ void RegenerateFiles();
+ void GenerateFiles(FileList* aFiles, nsIPrincipal* aFilesPrincipal);
+
+ ~DataTransferItemList() {}
+
+ RefPtr<DataTransfer> mDataTransfer;
+ bool mIsExternal;
+ RefPtr<FileList> mFiles;
+ // The principal for which mFiles is cached
+ nsCOMPtr<nsIPrincipal> mFilesPrincipal;
+ // mItems is the list of items that corresponds to the spec concept of a
+ // DataTransferItemList. That is, this is the thing the spec's indexed getter
+ // operates on. The items in here are a subset of the items present in the
+ // arrays that live in mIndexedItems.
+ nsTArray<RefPtr<DataTransferItem>> mItems;
+ // mIndexedItems represents all our items. For any given index, all items at
+ // that index have different types in the GetType() sense. That means that
+ // representing multiple items with the same type (e.g. multiple files)
+ // requires using multiple indices.
+ //
+ // There is always a (possibly empty) list of items at index 0, so
+ // mIndexedItems.Length() >= 1 at all times.
+ nsTArray<nsTArray<RefPtr<DataTransferItem>>> mIndexedItems;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_DataTransferItemList_h