src/third_party/WebKit/Source/core/dom/DataTransferItemList.cpp

   1 /*
   2  * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
   3  * Copyright (C) 2008, 2009 Google Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "core/dom/DataTransferItemList.h"
  29
  30 #include "bindings/v8/ExceptionState.h"
  31 #include "core/dom/Clipboard.h"
  32 #include "core/dom/DataObject.h"
  33 #include "core/dom/DataTransferItem.h"
  34 #include "core/dom/ExceptionCode.h"
  35
  36 namespace WebCore {
  37
  38 PassRefPtr<DataTransferItemList> DataTransferItemList::create(PassRefPtr<Clipboard> clipboard, PassRefPtr<DataObject> list)
  39 {
  40     return adoptRef(new DataTransferItemList(clipboard, list));
  41 }
  42
  43 DataTransferItemList::~DataTransferItemList()
  44 {
  45 }
  46
  47 size_t DataTransferItemList::length() const
  48 {
  49     if (!m_clipboard->canReadTypes())
  50         return 0;
  51     return m_dataObject->length();
  52 }
  53
  54 PassRefPtr<DataTransferItem> DataTransferItemList::item(unsigned long index)
  55 {
  56     if (!m_clipboard->canReadTypes())
  57         return 0;
  58     RefPtr<DataObjectItem> item = m_dataObject->item(index);
  59     if (!item)
  60         return 0;
  61
  62     return DataTransferItem::create(m_clipboard, item);
  63 }
  64
  65 void DataTransferItemList::deleteItem(unsigned long index, ExceptionState& exceptionState)
  66 {
  67     if (!m_clipboard->canWriteData()) {
  68         exceptionState.throwDOMException(InvalidStateError, "The list is not writable.");
  69         return;
  70     }
  71     m_dataObject->deleteItem(index);
  72 }
  73
  74 void DataTransferItemList::clear()
  75 {
  76     if (!m_clipboard->canWriteData())
  77         return;
  78     m_dataObject->clearAll();
  79 }
  80
  81 PassRefPtr<DataTransferItem> DataTransferItemList::add(const String& data, const String& type, ExceptionState& exceptionState)
  82 {
  83     if (!m_clipboard->canWriteData())
  84         return 0;
  85     RefPtr<DataObjectItem> item = m_dataObject->add(data, type);
  86     if (!item) {
  87         exceptionState.throwDOMException(NotSupportedError, "An item already exists for type '" + type + "'.");
  88         return 0;
  89     }
  90     return DataTransferItem::create(m_clipboard, item);
  91 }
  92
  93 PassRefPtr<DataTransferItem> DataTransferItemList::add(PassRefPtr<File> file)
  94 {
  95     if (!m_clipboard->canWriteData())
  96         return 0;
  97     RefPtr<DataObjectItem> item = m_dataObject->add(file);
  98     if (!item)
  99         return 0;
 100     return DataTransferItem::create(m_clipboard, item);
 101 }
 102
 103 DataTransferItemList::DataTransferItemList(PassRefPtr<Clipboard> clipboard, PassRefPtr<DataObject> dataObject)
 104     : m_clipboard(clipboard)
 105     , m_dataObject(dataObject)
 106 {
 107     ScriptWrappable::init(this);
 108 }
 109
 110 } // namespace WebCore