ReadableDataObject.h   [plain text]

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#ifndef ReadableDataObject_h
#define ReadableDataObject_h

#include "Clipboard.h"
#include "PlatformString.h"
#include <wtf/HashSet.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/text/StringHash.h>

namespace WebCore {

// Used for one way communication of drag/drop and copy/paste data from the
// browser to the renderer.
class ReadableDataObject : public RefCounted<ReadableDataObject> {
public:
    static PassRefPtr<ReadableDataObject> create(Clipboard::ClipboardType);

    bool hasData() const;
    HashSet<String> types() const;
    String getData(const String& type, bool& succeeded) const;

    String urlTitle() const;
    KURL htmlBaseUrl() const;

    bool containsFilenames() const;
    Vector<String> filenames() const;

private:
    explicit ReadableDataObject(Clipboard::ClipboardType);

    // This isn't always const... but most of the time it is.
    void ensureTypeCacheInitialized() const;

    Clipboard::ClipboardType m_clipboardType;

    // To avoid making a lot of IPC calls for each drag event, we cache some
    // values in the renderer.
    mutable HashSet<String> m_types;
    mutable bool m_containsFilenames;
    mutable bool m_isTypeCacheInitialized;
};

} // namespace WebCore

#endif