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

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#include "core/clipboard/DataTransferItem.h"

#include "bindings/core/v8/V8Binding.h"
#include "core/clipboard/DataObjectItem.h"
#include "core/clipboard/DataTransfer.h"
#include "core/dom/StringCallback.h"
#include "wtf/StdLibExtras.h"

namespace blink {

DataTransferItem* DataTransferItem::create(DataTransfer* dataTransfer, DataObjectItem* item)
{
    return new DataTransferItem(dataTransfer, item);
}

String DataTransferItem::kind() const
{
    DEFINE_STATIC_LOCAL(const String, kindString, ("string"));
    DEFINE_STATIC_LOCAL(const String, kindFile, ("file"));
    if (!m_dataTransfer->canReadTypes())
        return String();
    switch (m_item->kind()) {
    case DataObjectItem::StringKind:
        return kindString;
    case DataObjectItem::FileKind:
        return kindFile;
    }
    ASSERT_NOT_REACHED();
    return String();
}

String DataTransferItem::type() const
{
    if (!m_dataTransfer->canReadTypes())
        return String();
    return m_item->type();
}

void DataTransferItem::getAsString(ExecutionContext* context, StringCallback* callback) const
{
    if (!m_dataTransfer->canReadData())
        return;
    if (!callback || m_item->kind() != DataObjectItem::StringKind)
        return;

    StringCallback::scheduleCallback(callback, context, m_item->getAsString(), "DataTransferItem.getAsString");
}

Blob* DataTransferItem::getAsFile() const
{
    if (!m_dataTransfer->canReadData())
        return nullptr;

    return m_item->getAsFile();
}

DataTransferItem::DataTransferItem(DataTransfer* dataTransfer, DataObjectItem* item)
    : m_dataTransfer(dataTransfer)
    , m_item(item)
{
}

DEFINE_TRACE(DataTransferItem)
{
    visitor->trace(m_dataTransfer);
    visitor->trace(m_item);
}

} // namespace blink