third_party/WebKit/Source/core/clipboard/DataObject.h

/*
 * Copyright (c) 2008, 2009, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef DataObject_h
#define DataObject_h

#include "core/CoreExport.h"
#include "core/clipboard/DataObjectItem.h"
#include "platform/PasteMode.h"
#include "platform/Supplementable.h"
#include "platform/heap/Handle.h"
#include "wtf/PassRefPtr.h"
#include "wtf/Vector.h"
#include "wtf/text/StringHash.h"
#include "wtf/text/WTFString.h"

namespace blink {

class KURL;
class SharedBuffer;
class WebDragData;

// 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 CORE_EXPORT DataObject : public GarbageCollectedFinalized<DataObject>,
                               public Supplementable<DataObject> {
  USING_GARBAGE_COLLECTED_MIXIN(DataObject);

 public:
  static DataObject* createFromPasteboard(PasteMode);
  static DataObject* create();
  static DataObject* create(WebDragData);

  virtual ~DataObject();

  // DataTransferItemList support.
  size_t length() const;
  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.
  DataObjectItem* add(const String& data, const String& type);
  DataObjectItem* add(File*);

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

  Vector<String> types() const;
  String getData(const String& type) const;
  void 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 for dragging in filesystem from the desktop.
  void setFilesystemId(const String& fileSystemId) {
    m_filesystemId = fileSystemId;
  }
  const String& filesystemId() const {
    ASSERT(!m_filesystemId.isEmpty());
    return m_filesystemId;
  }

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

  int modifiers() const { return m_modifiers; }
  void setModifiers(int modifiers) { m_modifiers = modifiers; }

  DECLARE_TRACE();

  WebDragData toWebDragData();

 private:
  DataObject();

  DataObjectItem* findStringItem(const String& type) const;
  bool internalAddStringItem(DataObjectItem*);
  void internalAddFileItem(DataObjectItem*);

  HeapVector<Member<DataObjectItem>> m_itemList;

  // State of Shift/Ctrl/Alt/Meta keys and Left/Right/Middle mouse buttons
  int m_modifiers;
  String m_filesystemId;
};

}  // namespace blink

#endif