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      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
    114