Source/modules/filesystem/DataTransferItemFileSystem.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "modules/filesystem/DataTransferItemFileSystem.h"

#include "core/clipboard/DataObject.h"
#include "core/clipboard/DataTransfer.h"
#include "core/clipboard/DataTransferItem.h"
#include "core/dom/ExecutionContext.h"
#include "core/fileapi/File.h"
#include "modules/filesystem/DOMFilePath.h"
#include "modules/filesystem/DOMFileSystem.h"
#include "modules/filesystem/DirectoryEntry.h"
#include "modules/filesystem/DraggedIsolatedFileSystem.h"
#include "modules/filesystem/Entry.h"
#include "modules/filesystem/FileEntry.h"
#include "platform/AsyncFileSystemCallbacks.h"
#include "platform/FileMetadata.h"

namespace blink {

// static
Entry* DataTransferItemFileSystem::webkitGetAsEntry(ExecutionContext* executionContext, DataTransferItem& item)
{
    if (!item.dataObjectItem()->isFilename())
        return 0;

    // For dragged files getAsFile must be pretty lightweight.
    Blob* file = item.getAsFile();
    // The clipboard may not be in a readable state.
    if (!file)
        return 0;
    ASSERT(file->isFile());

    DOMFileSystem* domFileSystem = DraggedIsolatedFileSystem::getDOMFileSystem(item.dataTransfer()->dataObject().get(), executionContext);
    if (!domFileSystem) {
        // IsolatedFileSystem may not be enabled.
        return 0;
    }

    // The dropped entries are mapped as top-level entries in the isolated filesystem.
    String virtualPath = DOMFilePath::append("/", toFile(file)->name());

    // FIXME: This involves synchronous file operation. Consider passing file type data when we dispatch drag event.
    FileMetadata metadata;
    if (!getFileMetadata(toFile(file)->path(), metadata))
        return 0;

    if (metadata.type == FileMetadata::TypeDirectory)
        return DirectoryEntry::create(domFileSystem, virtualPath);
    return FileEntry::create(domFileSystem, virtualPath);
}

} // namespace blink