src/third_party/WebKit/Source/core/clipboard/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/clipboard/DataTransferItemList.h"
  29
  30 #include "bindings/core/v8/ExceptionState.h"
  31 #include "core/clipboard/DataObject.h"
  32 #include "core/clipboard/DataTransfer.h"
  33 #include "core/clipboard/DataTransferItem.h"
  34 #include "core/dom/ExceptionCode.h"
  35
  36 namespace blink {
  37
  38 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DataTransferItemList);
  39
  40 PassRefPtrWillBeRawPtr<DataTransferItemList> DataTransferItemList::create(PassRefPtrWillBeRawPtr<DataTransfer> dataTransfer, PassRefPtrWillBeRawPtr<DataObject> list)
  41 {
  42     return adoptRefWillBeNoop(new DataTransferItemList(dataTransfer, list));
  43 }
  44
  45 size_t DataTransferItemList::length() const
  46 {
  47     if (!m_dataTransfer->canReadTypes())
  48         return 0;
  49     return m_dataObject->length();
  50 }
  51
  52 PassRefPtrWillBeRawPtr<DataTransferItem> DataTransferItemList::item(unsigned long index)
  53 {
  54     if (!m_dataTransfer->canReadTypes())
  55         return nullptr;
  56     RefPtrWillBeRawPtr<DataObjectItem> item = m_dataObject->item(index);
  57     if (!item)
  58         return nullptr;
  59
  60     return DataTransferItem::create(m_dataTransfer, item);
  61 }
  62
  63 void DataTransferItemList::deleteItem(unsigned long index, ExceptionState& exceptionState)
  64 {
  65     if (!m_dataTransfer->canWriteData()) {
  66         exceptionState.throwDOMException(InvalidStateError, "The list is not writable.");
  67         return;
  68     }
  69     m_dataObject->deleteItem(index);
  70 }
  71
  72 void DataTransferItemList::clear()
  73 {
  74     if (!m_dataTransfer->canWriteData())
  75         return;
  76     m_dataObject->clearAll();
  77 }
  78
  79 PassRefPtrWillBeRawPtr<DataTransferItem> DataTransferItemList::add(const String& data, const String& type, ExceptionState& exceptionState)
  80 {
  81     if (!m_dataTransfer->canWriteData())
  82         return nullptr;
  83     RefPtrWillBeRawPtr<DataObjectItem> item = m_dataObject->add(data, type);
  84     if (!item) {
  85         exceptionState.throwDOMException(NotSupportedError, "An item already exists for type '" + type + "'.");
  86         return nullptr;
  87     }
  88     return DataTransferItem::create(m_dataTransfer, item);
  89 }
  90
  91 PassRefPtrWillBeRawPtr<DataTransferItem> DataTransferItemList::add(PassRefPtrWillBeRawPtr<File> file)
  92 {
  93     if (!m_dataTransfer->canWriteData())
  94         return nullptr;
  95     RefPtrWillBeRawPtr<DataObjectItem> item = m_dataObject->add(file);
  96     if (!item)
  97         return nullptr;
  98     return DataTransferItem::create(m_dataTransfer, item);
  99 }
 100
 101 DataTransferItemList::DataTransferItemList(PassRefPtrWillBeRawPtr<DataTransfer> dataTransfer, PassRefPtrWillBeRawPtr<DataObject> dataObject)
 102     : m_dataTransfer(dataTransfer)
 103     , m_dataObject(dataObject)
 104 {
 105 }
 106
 107 void DataTransferItemList::trace(Visitor* visitor)
 108 {
 109     visitor->trace(m_dataTransfer);
 110     visitor->trace(m_dataObject);
 111 }
 112
 113 } // namespace blink