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      1 /*
      2  * Copyright (C) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "core/clipboard/DataTransferItem.h"
     33 
     34 #include "bindings/v8/V8Binding.h"
     35 #include "core/clipboard/Clipboard.h"
     36 #include "core/clipboard/DataObjectItem.h"
     37 #include "core/dom/StringCallback.h"
     38 #include "wtf/StdLibExtras.h"
     39 
     40 namespace WebCore {
     41 
     42 PassRefPtrWillBeRawPtr<DataTransferItem> DataTransferItem::create(PassRefPtrWillBeRawPtr<Clipboard> clipboard, PassRefPtrWillBeRawPtr<DataObjectItem> item)
     43 {
     44     return adoptRefWillBeNoop(new DataTransferItem(clipboard, item));
     45 }
     46 
     47 DataTransferItem::~DataTransferItem()
     48 {
     49 }
     50 
     51 String DataTransferItem::kind() const
     52 {
     53     DEFINE_STATIC_LOCAL(const String, kindString, ("string"));
     54     DEFINE_STATIC_LOCAL(const String, kindFile, ("file"));
     55     if (!m_clipboard->canReadTypes())
     56         return String();
     57     switch (m_item->kind()) {
     58     case DataObjectItem::StringKind:
     59         return kindString;
     60     case DataObjectItem::FileKind:
     61         return kindFile;
     62     }
     63     ASSERT_NOT_REACHED();
     64     return String();
     65 }
     66 
     67 String DataTransferItem::type() const
     68 {
     69     if (!m_clipboard->canReadTypes())
     70         return String();
     71     return m_item->type();
     72 }
     73 
     74 void DataTransferItem::getAsString(ExecutionContext* context, PassOwnPtr<StringCallback> callback) const
     75 {
     76     if (!m_clipboard->canReadData())
     77         return;
     78     if (!callback || m_item->kind() != DataObjectItem::StringKind)
     79         return;
     80 
     81     StringCallback::scheduleCallback(callback, context, m_item->getAsString());
     82 }
     83 
     84 PassRefPtrWillBeRawPtr<Blob> DataTransferItem::getAsFile() const
     85 {
     86     if (!m_clipboard->canReadData())
     87         return nullptr;
     88 
     89     return m_item->getAsFile();
     90 }
     91 
     92 DataTransferItem::DataTransferItem(PassRefPtrWillBeRawPtr<Clipboard> clipboard, PassRefPtrWillBeRawPtr<DataObjectItem> item)
     93     : m_clipboard(clipboard)
     94     , m_item(item)
     95 {
     96     ScriptWrappable::init(this);
     97 }
     98 
     99 void DataTransferItem::trace(Visitor* visitor)
    100 {
    101     visitor->trace(m_clipboard);
    102     visitor->trace(m_item);
    103 }
    104 
    105 } // namespace WebCore
    106 
    107