/*
 * Copyright (C) 2011 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,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "core/clipboard/DataTransferItem.h"

#include "bindings/core/v8/V8Binding.h"
#include "core/clipboard/DataObjectItem.h"
#include "core/clipboard/DataTransfer.h"
#include "core/dom/StringCallback.h"
#include "wtf/StdLibExtras.h"

namespace blink {

DataTransferItem* DataTransferItem::create(DataTransfer* dataTransfer,
                                           DataObjectItem* item) {
  return new DataTransferItem(dataTransfer, item);
}

String DataTransferItem::kind() const {
  DEFINE_STATIC_LOCAL(const String, kindString, ("string"));
  DEFINE_STATIC_LOCAL(const String, kindFile, ("file"));
  if (!m_dataTransfer->canReadTypes())
    return String();
  switch (m_item->kind()) {
    case DataObjectItem::StringKind:
      return kindString;
    case DataObjectItem::FileKind:
      return kindFile;
  }
  ASSERT_NOT_REACHED();
  return String();
}

String DataTransferItem::type() const {
  if (!m_dataTransfer->canReadTypes())
    return String();
  return m_item->type();
}

void DataTransferItem::getAsString(ExecutionContext* context,
                                   StringCallback* callback) const {
  if (!m_dataTransfer->canReadData())
    return;
  if (!callback || m_item->kind() != DataObjectItem::StringKind)
    return;

  StringCallback::scheduleCallback(callback, context, m_item->getAsString(),
                                   "DataTransferItem.getAsString");
}

Blob* DataTransferItem::getAsFile() const {
  if (!m_dataTransfer->canReadData())
    return nullptr;

  return m_item->getAsFile();
}

DataTransferItem::DataTransferItem(DataTransfer* dataTransfer,
                                   DataObjectItem* item)
    : m_dataTransfer(dataTransfer), m_item(item) {}

DEFINE_TRACE(DataTransferItem) {
  visitor->trace(m_dataTransfer);
  visitor->trace(m_item);
}

}  // namespace blink