third_party/WebKit/Source/core/clipboard/DataTransferItemList.cpp

/*
 * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
 * Copyright (C) 2008, 2009 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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.
 */

#include "core/clipboard/DataTransferItemList.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/clipboard/DataObject.h"
#include "core/clipboard/DataTransfer.h"
#include "core/clipboard/DataTransferItem.h"
#include "core/dom/ExceptionCode.h"

namespace blink {

DataTransferItemList* DataTransferItemList::Create(DataTransfer* data_transfer,
                                                   DataObject* list) {
  return new DataTransferItemList(data_transfer, list);
}

size_t DataTransferItemList::length() const {
  if (!data_transfer_->CanReadTypes())
    return 0;
  return data_object_->length();
}

DataTransferItem* DataTransferItemList::item(unsigned long index) {
  if (!data_transfer_->CanReadTypes())
    return nullptr;
  DataObjectItem* item = data_object_->Item(index);
  if (!item)
    return nullptr;

  return DataTransferItem::Create(data_transfer_, item);
}

void DataTransferItemList::deleteItem(unsigned long index,
                                      ExceptionState& exception_state) {
  if (!data_transfer_->CanWriteData()) {
    exception_state.ThrowDOMException(kInvalidStateError,
                                      "The list is not writable.");
    return;
  }
  data_object_->DeleteItem(index);
}

void DataTransferItemList::clear() {
  if (!data_transfer_->CanWriteData())
    return;
  data_object_->ClearAll();
}

DataTransferItem* DataTransferItemList::add(const String& data,
                                            const String& type,
                                            ExceptionState& exception_state) {
  if (!data_transfer_->CanWriteData())
    return nullptr;
  DataObjectItem* item = data_object_->Add(data, type);
  if (!item) {
    exception_state.ThrowDOMException(
        kNotSupportedError, "An item already exists for type '" + type + "'.");
    return nullptr;
  }
  return DataTransferItem::Create(data_transfer_, item);
}

DataTransferItem* DataTransferItemList::add(File* file) {
  if (!data_transfer_->CanWriteData())
    return nullptr;
  DataObjectItem* item = data_object_->Add(file);
  if (!item)
    return nullptr;
  return DataTransferItem::Create(data_transfer_, item);
}

DataTransferItemList::DataTransferItemList(DataTransfer* data_transfer,
                                           DataObject* data_object)
    : data_transfer_(data_transfer), data_object_(data_object) {}

DEFINE_TRACE(DataTransferItemList) {
  visitor->Trace(data_transfer_);
  visitor->Trace(data_object_);
}

}  // namespace blink