1/*
2 * Copyright (C) 2012 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 "modules/filesystem/DataTransferItemFileSystem.h"
33
34#include "core/dom/ScriptExecutionContext.h"
35#include "core/fileapi/File.h"
36#include "core/platform/AsyncFileSystem.h"
37#include "core/platform/AsyncFileSystemCallbacks.h"
38#include "core/platform/FileMetadata.h"
39#include "core/platform/FileSystem.h"
40#include "core/platform/chromium/ChromiumDataObject.h"
41#include "core/platform/chromium/ClipboardChromium.h"
42#include "modules/filesystem/DOMFilePath.h"
43#include "modules/filesystem/DOMFileSystem.h"
44#include "modules/filesystem/DirectoryEntry.h"
45#include "modules/filesystem/DraggedIsolatedFileSystem.h"
46#include "modules/filesystem/Entry.h"
47#include "modules/filesystem/FileEntry.h"
48
49namespace WebCore {
50
51// static
52PassRefPtr<Entry> DataTransferItemFileSystem::webkitGetAsEntry(ScriptExecutionContext* scriptExecutionContext, DataTransferItem* item)
53{
54    DataTransferItemPolicyWrapper* itemPolicyWrapper = static_cast<DataTransferItemPolicyWrapper*>(item);
55
56    if (!itemPolicyWrapper->dataObjectItem()->isFilename())
57        return adoptRef(static_cast<Entry*>(0));
58
59    // For dragged files getAsFile must be pretty lightweight.
60    Blob* file = itemPolicyWrapper->getAsFile().get();
61    // The clipboard may not be in a readable state.
62    if (!file)
63        return adoptRef(static_cast<Entry*>(0));
64    ASSERT(file->isFile());
65
66    DraggedIsolatedFileSystem* filesystem = DraggedIsolatedFileSystem::from(itemPolicyWrapper->clipboard()->dataObject().get());
67    DOMFileSystem* domFileSystem = filesystem ? filesystem->getDOMFileSystem(scriptExecutionContext) : 0;
68    if (!filesystem) {
69        // IsolatedFileSystem may not be enabled.
70        return adoptRef(static_cast<Entry*>(0));
71    }
72
73    ASSERT(domFileSystem);
74
75    // The dropped entries are mapped as top-level entries in the isolated filesystem.
76    String virtualPath = DOMFilePath::append("/", toFile(file)->name());
77
78    // FIXME: This involves synchronous file operation. Consider passing file type data when we dispatch drag event.
79    FileMetadata metadata;
80    if (!getFileMetadata(toFile(file)->path(), metadata))
81        return adoptRef(static_cast<Entry*>(0));
82
83    if (metadata.type == FileMetadata::TypeDirectory)
84        return static_cast<Entry*>(DirectoryEntry::create(domFileSystem, virtualPath).get());
85    return static_cast<Entry*>(FileEntry::create(domFileSystem, virtualPath).get());
86}
87
88} // namespace WebCore
89