Source/core/clipboard/DataObject.h

/*
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#ifndef DataObject_h
#define DataObject_h

#include "core/clipboard/DataObjectItem.h"
#include "platform/PasteMode.h"
#include "platform/Supplementable.h"
#include "wtf/ListHashSet.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
#include "wtf/text/StringHash.h"
#include "wtf/text/WTFString.h"

namespace WebCore {

class KURL;
class SharedBuffer;

// A data object for holding data that would be in a clipboard or moved
// during a drag-n-drop operation. This is the data that WebCore is aware
// of and is not specific to a platform.
class DataObject : public RefCounted<DataObject>, public Supplementable<DataObject> {
public:
    static PassRefPtr<DataObject> createFromPasteboard(PasteMode);
    static PassRefPtr<DataObject> create();

    PassRefPtr<DataObject> copy() const;

    // DataTransferItemList support.
    size_t length() const;
    PassRefPtr<DataObjectItem> item(unsigned long index);
    // FIXME: Implement V8DataTransferItemList::indexedPropertyDeleter to get this called.
    void deleteItem(unsigned long index);
    void clearAll();
    // Returns null if an item already exists with the provided type.
    PassRefPtr<DataObjectItem> add(const String& data, const String& type);
    PassRefPtr<DataObjectItem> add(PassRefPtr<File>);

    // WebCore helpers.
    void clearData(const String& type);
    void clearAllExceptFiles();

    ListHashSet<String> types() const;
    String getData(const String& type) const;
    bool setData(const String& type, const String& data);

    void urlAndTitle(String& url, String* title = 0) const;
    void setURLAndTitle(const String& url, const String& title);
    void htmlAndBaseURL(String& html, KURL& baseURL) const;
    void setHTMLAndBaseURL(const String& html, const KURL& baseURL);

    // Used for dragging in files from the desktop.
    bool containsFilenames() const;
    Vector<String> filenames() const;
    void addFilename(const String& filename, const String& displayName);

    // Used to handle files (images) being dragged out.
    void addSharedBuffer(const String& name, PassRefPtr<SharedBuffer>);

    int modifierKeyState() const { return m_modifierKeyState; }
    void setModifierKeyState(int modifierKeyState) { m_modifierKeyState = modifierKeyState; }

private:
    DataObject();
    explicit DataObject(const DataObject&);

    PassRefPtr<DataObjectItem> findStringItem(const String& type) const;
    bool internalAddStringItem(PassRefPtr<DataObjectItem>);
    void internalAddFileItem(PassRefPtr<DataObjectItem>);

    Vector<RefPtr<DataObjectItem> > m_itemList;

    // State of Shift/Ctrl/Alt/Meta keys.
    int m_modifierKeyState;
};

} // namespace WebCore

#endif