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/*
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2003-2020 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "CachedResourceHandle.h"
#include "DragActions.h"
#include "DragImage.h"
#include <wtf/CheckedRef.h>
#include <wtf/RefCountedAndCanMakeWeakPtr.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class CachedImage;
class DataTransferItemList;
class Document;
class DragData;
class DragImageLoader;
class Element;
class FileList;
class File;
class Pasteboard;
class ScriptExecutionContext;
enum class WebContentReadingPolicy : bool;
class DataTransfer : public RefCountedAndCanMakeWeakPtr<DataTransfer> {
public:
// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-mode
enum class StoreMode { Invalid, ReadWrite, Readonly, Protected };
static Ref<DataTransfer> create();
static Ref<DataTransfer> createForCopyAndPaste(const Document&, StoreMode, std::unique_ptr<Pasteboard>&&);
static Ref<DataTransfer> createForInputEvent(const String& plainText, const String& htmlText);
WEBCORE_EXPORT ~DataTransfer();
String dropEffect() const;
void setDropEffect(const String&);
String effectAllowed() const;
void setEffectAllowed(const String&);
DataTransferItemList& items(Document&);
Vector<String> types(Document&) const;
Vector<String> typesForItemList(Document&) const;
FileList& files(Document*) const;
FileList& files(Document&) const;
void clearData(const String& type = String());
String getData(Document&, const String& type) const;
String getDataForItem(Document&, const String& type) const;
void setData(Document&, const String& type, const String& data);
void setDataFromItemList(Document&, const String& type, const String& data);
void setDragImage(Ref<Element>&&, int x, int y);
void makeInvalidForSecurity() { m_storeMode = StoreMode::Invalid; }
bool canReadTypes() const;
bool canReadData() const;
bool canWriteData() const;
bool hasFileOfType(const String&);
bool hasStringOfType(Document&, const String&);
Pasteboard& pasteboard() { return *m_pasteboard; }
void commitToPasteboard(Pasteboard&);
#if ENABLE(DRAG_SUPPORT)
static Ref<DataTransfer> createForDrag(const Document&);
static Ref<DataTransfer> createForDragStartEvent(const Document&);
static Ref<DataTransfer> createForDrop(const Document&, std::unique_ptr<Pasteboard>&&, OptionSet<DragOperation>, bool draggingFiles);
static Ref<DataTransfer> createForUpdatingDropTarget(const Document&, std::unique_ptr<Pasteboard>&&, OptionSet<DragOperation>, bool draggingFiles);
bool dropEffectIsUninitialized() const { return m_dropEffect == "uninitialized"_s; }
OptionSet<DragOperation> sourceOperationMask() const;
OptionSet<DragOperation> destinationOperationMask() const;
void setSourceOperationMask(OptionSet<DragOperation>);
void setDestinationOperationMask(OptionSet<DragOperation>);
void setDragHasStarted() { m_shouldUpdateDragImage = true; }
DragImageRef createDragImage(const Document*, IntPoint& dragLocation) const;
void updateDragImage(const Document*);
RefPtr<Element> dragImageElement() const;
void moveDragState(Ref<DataTransfer>&&);
bool hasDragImage() const;
IntPoint dragLocation() const { return m_dragLocation; }
#endif
void didAddFileToItemList();
void updateFileList(ScriptExecutionContext*);
private:
enum class Type { CopyAndPaste, DragAndDropData, DragAndDropFiles, InputEvent };
DataTransfer(StoreMode, std::unique_ptr<Pasteboard>, Type = Type::CopyAndPaste, String&& effectAllowed = "uninitialized"_s);
bool allowsFileAccess() const
{
return !forDrag() || forFileDrag();
}
#if ENABLE(DRAG_SUPPORT)
bool forDrag() const { return m_type == Type::DragAndDropData || m_type == Type::DragAndDropFiles; }
bool forFileDrag() const { return m_type == Type::DragAndDropFiles; }
#else
bool forDrag() const { return false; }
bool forFileDrag() const { return false; }
#endif
String readStringFromPasteboard(Document&, const String& lowercaseType, WebContentReadingPolicy) const;
bool shouldSuppressGetAndSetDataToAvoidExposingFilePaths() const;
enum class AddFilesType : bool { No, Yes };
Vector<String> types(Document&, AddFilesType) const;
Vector<Ref<File>> filesFromPasteboardAndItemList(ScriptExecutionContext*) const;
String m_originIdentifier;
StoreMode m_storeMode;
std::unique_ptr<Pasteboard> m_pasteboard;
std::unique_ptr<DataTransferItemList> m_itemList;
mutable RefPtr<FileList> m_fileList;
#if ENABLE(DRAG_SUPPORT)
Type m_type;
String m_dropEffect;
String m_effectAllowed;
bool m_shouldUpdateDragImage;
IntPoint m_dragLocation;
CachedResourceHandle<CachedImage> m_dragImage;
RefPtr<Element> m_dragImageElement;
std::unique_ptr<DragImageLoader> m_dragImageLoader;
#endif
};
} // namespace WebCore
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