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 "DataTransferItemChromium.h"
33
34#if ENABLE(DATA_TRANSFER_ITEMS)
35
36#include "Blob.h"
37#include "Clipboard.h"
38#include "ClipboardMimeTypes.h"
39#include "PlatformBridge.h"
40#include "SharedBuffer.h"
41#include "StringCallback.h"
42
43namespace WebCore {
44
45PassRefPtr<DataTransferItemChromium> DataTransferItemChromium::createFromPasteboard(PassRefPtr<Clipboard> owner, ScriptExecutionContext* context, const String& type)
46{
47    if (type == mimeTypeTextPlain || type == mimeTypeTextHTML)
48        return adoptRef(new DataTransferItemChromium(owner, context, PasteboardSource, DataTransferItem::kindString, type, ""));
49    return adoptRef(new DataTransferItemChromium(owner, context, PasteboardSource, DataTransferItem::kindFile, type, ""));
50}
51
52PassRefPtr<DataTransferItemChromium> DataTransferItemChromium::create(PassRefPtr<Clipboard> owner,
53                                                                      ScriptExecutionContext* context,
54                                                                      const String& data,
55                                                                      const String& type)
56{
57    return adoptRef(new DataTransferItemChromium(owner, context, InternalSource, DataTransferItem::kindString, type, data));
58}
59
60DataTransferItemChromium::DataTransferItemChromium(PassRefPtr<Clipboard> owner, ScriptExecutionContext* context, DataSource source, const String& kind, const String& type, const String& data)
61    : m_owner(owner)
62    , m_context(context)
63    , m_source(source)
64    , m_kind(kind)
65    , m_type(type)
66    , m_data(data)
67{
68}
69
70String DataTransferItemChromium::kind() const
71{
72    if (m_owner->policy() == ClipboardNumb)
73        return String();
74    return m_kind;
75}
76
77String DataTransferItemChromium::type() const
78{
79    if (m_owner->policy() == ClipboardNumb)
80        return String();
81    return m_type;
82}
83
84void DataTransferItemChromium::getAsString(PassRefPtr<StringCallback> callback)
85{
86    if ((m_owner->policy() != ClipboardReadable && m_owner->policy() != ClipboardWritable)
87        || m_kind != kindString)
88        return;
89    if (m_source == InternalSource) {
90        callback->scheduleCallback(m_context, m_data);
91        return;
92    }
93
94    ASSERT(m_source == PasteboardSource);
95    // This is ugly but there's no real alternative.
96    if (m_type == mimeTypeTextPlain) {
97        callback->scheduleCallback(m_context, PlatformBridge::clipboardReadPlainText(PasteboardPrivate::StandardBuffer));
98        return;
99    }
100    if (m_type == mimeTypeTextHTML) {
101        String html;
102        KURL ignoredSourceURL;
103        PlatformBridge::clipboardReadHTML(PasteboardPrivate::StandardBuffer, &html, &ignoredSourceURL);
104        callback->scheduleCallback(m_context, html);
105        return;
106    }
107    ASSERT_NOT_REACHED();
108}
109
110PassRefPtr<Blob> DataTransferItemChromium::getAsFile()
111{
112    if (m_source == InternalSource)
113        return 0;
114
115    ASSERT(m_source == PasteboardSource);
116    if (m_type == mimeTypeImagePng) {
117        // FIXME: This is pretty inefficient. We copy the data from the browser
118        // to the renderer. We then place it in a blob in WebKit, which
119        // registers it and copies it *back* to the browser. When a consumer
120        // wants to read the data, we then copy the data back into the renderer.
121        // https://bugs.webkit.org/show_bug.cgi?id=58107 has been filed to track
122        // improvements to this code (in particular, add a registerClipboardBlob
123        // method to the blob registry; that way the data is only copied over
124        // into the renderer when it's actually read, not when the blob is
125        // initially constructed).
126        RefPtr<SharedBuffer> data = PlatformBridge::clipboardReadImage(PasteboardPrivate::StandardBuffer);
127        RefPtr<RawData> rawData = RawData::create();
128        rawData->mutableData()->append(data->data(), data->size());
129        OwnPtr<BlobData> blobData = BlobData::create();
130        blobData->appendData(rawData, 0, -1);
131        blobData->setContentType(mimeTypeImagePng);
132        return Blob::create(blobData.release(), data->size());
133    }
134    return 0;
135}
136
137} // namespace WebCore
138
139#endif // ENABLE(DATA_TRANSFER_ITEMS)
140