зеркало из https://github.com/mozilla/gecko-dev.git
128 строки
4.0 KiB
C++
128 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_DataTransferItem_h
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#define mozilla_dom_DataTransferItem_h
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#include "mozilla/ErrorResult.h"
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#include "mozilla/dom/DataTransfer.h"
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#include "mozilla/dom/DOMString.h"
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#include "mozilla/dom/File.h"
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namespace mozilla {
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namespace dom {
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class FileSystemEntry;
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class FunctionStringCallback;
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class DataTransferItem final : public nsISupports, public nsWrapperCache {
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DataTransferItem);
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public:
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// The spec only talks about the "file" and "string" kinds. Due to the Moz*
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// APIs, it is possible to attach any type to a DataTransferItem, meaning that
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// we can have other kinds then just FILE and STRING. These others are simply
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// marked as "other" and can only be produced throug the Moz* APIs.
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enum eKind {
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KIND_FILE,
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KIND_STRING,
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KIND_OTHER,
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};
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DataTransferItem(DataTransfer* aDataTransfer, const nsAString& aType,
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eKind aKind = KIND_OTHER)
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: mIndex(0),
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mChromeOnly(false),
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mKind(aKind),
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mType(aType),
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mDataTransfer(aDataTransfer) {
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MOZ_ASSERT(mDataTransfer, "Must be associated with a DataTransfer");
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}
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already_AddRefed<DataTransferItem> Clone(DataTransfer* aDataTransfer) const;
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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void GetAsString(FunctionStringCallback* aCallback,
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nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv);
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void GetKind(nsAString& aKind) const {
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switch (mKind) {
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case KIND_FILE:
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aKind = NS_LITERAL_STRING("file");
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return;
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case KIND_STRING:
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aKind = NS_LITERAL_STRING("string");
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return;
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default:
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aKind = NS_LITERAL_STRING("other");
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return;
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}
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}
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void GetInternalType(nsAString& aType) const { aType = mType; }
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void GetType(nsAString& aType);
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eKind Kind() const { return mKind; }
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already_AddRefed<File> GetAsFile(nsIPrincipal& aSubjectPrincipal,
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ErrorResult& aRv);
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already_AddRefed<FileSystemEntry> GetAsEntry(nsIPrincipal& aSubjectPrincipal,
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ErrorResult& aRv);
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DataTransfer* GetParentObject() const { return mDataTransfer; }
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nsIPrincipal* Principal() const { return mPrincipal; }
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void SetPrincipal(nsIPrincipal* aPrincipal) { mPrincipal = aPrincipal; }
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already_AddRefed<nsIVariant> DataNoSecurityCheck();
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// Data may return null if the clipboard state has changed since the type was
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// detected.
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already_AddRefed<nsIVariant> Data(nsIPrincipal* aPrincipal, ErrorResult& aRv);
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// Note: This can modify the mKind. Callers of this method must let the
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// relevant DataTransfer know, because its types list can change as a result.
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void SetData(nsIVariant* aData);
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uint32_t Index() const { return mIndex; }
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void SetIndex(uint32_t aIndex) { mIndex = aIndex; }
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void FillInExternalData();
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bool ChromeOnly() const { return mChromeOnly; }
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void SetChromeOnly(bool aChromeOnly) { mChromeOnly = aChromeOnly; }
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static eKind KindFromData(nsIVariant* aData);
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private:
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~DataTransferItem() {}
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already_AddRefed<File> CreateFileFromInputStream(nsIInputStream* aStream);
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already_AddRefed<nsIGlobalObject> GetGlobalFromDataTransfer();
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// The index in the 2d mIndexedItems array
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uint32_t mIndex;
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bool mChromeOnly;
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eKind mKind;
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const nsString mType;
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nsCOMPtr<nsIVariant> mData;
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nsCOMPtr<nsIPrincipal> mPrincipal;
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RefPtr<DataTransfer> mDataTransfer;
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// File cache for nsIFile application/x-moz-file entries.
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RefPtr<File> mCachedFile;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_DataTransferItem_h */
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