1 /*
2 * Copyright (C) 2007 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "WebDocumentLoader.h"
28
29 #include "WebKitDLL.h"
30
31 using namespace WebCore;
32
WebDocumentLoader(const ResourceRequest & request,const SubstituteData & substituteData)33 WebDocumentLoader::WebDocumentLoader(const ResourceRequest& request, const SubstituteData& substituteData)
34 : DocumentLoader(request, substituteData)
35 , m_dataSource(0)
36 , m_detachedDataSource(0)
37 {
38 gClassCount++;
39 gClassNameCount.add("WebDocumentLoader");
40 }
41
create(const ResourceRequest & req,const SubstituteData & data)42 PassRefPtr<WebDocumentLoader> WebDocumentLoader::create(const ResourceRequest& req, const SubstituteData& data)
43 {
44 return adoptRef(new WebDocumentLoader(req, data));
45 }
46
~WebDocumentLoader()47 WebDocumentLoader::~WebDocumentLoader()
48 {
49 gClassCount--;
50 gClassNameCount.remove("WebDocumentLoader");
51 if (m_dataSource) {
52 ASSERT(!m_detachedDataSource);
53 m_dataSource->Release();
54 }
55 }
56
setDataSource(WebDataSource * dataSource)57 void WebDocumentLoader::setDataSource(WebDataSource *dataSource)
58 {
59 ASSERT(!m_dataSource);
60 m_dataSource = dataSource;
61 if (m_dataSource)
62 m_dataSource->AddRef();
63 }
64
dataSource() const65 WebDataSource* WebDocumentLoader::dataSource() const
66 {
67 return m_dataSource;
68 }
69
detachDataSource()70 void WebDocumentLoader::detachDataSource()
71 {
72 // we only call detachDataSource when the WebDataSource is freed - and we won't get there if m_dataSource is not
73 // null (because that would mean the loader still has a reference to the data source)
74 ASSERT(!m_dataSource);
75 m_detachedDataSource = 0;
76 }
77
attachToFrame()78 void WebDocumentLoader::attachToFrame()
79 {
80 DocumentLoader::attachToFrame();
81 if (m_detachedDataSource) {
82 ASSERT(!m_dataSource);
83 setDataSource(m_detachedDataSource);
84 m_detachedDataSource = 0;
85 }
86 }
87
detachFromFrame()88 void WebDocumentLoader::detachFromFrame()
89 {
90 DocumentLoader::detachFromFrame();
91 m_detachedDataSource = m_dataSource;
92 if (m_dataSource) {
93 WebDataSource* dataSourceToBeReleased = m_dataSource;
94 // It's important to null out m_dataSource before calling release on the data source. That release can cause the data
95 // source to be deleted - which ends up calling loader->detachDataSource() which makes the assumption that the loader no
96 // longer holds a reference to the data source.
97 m_dataSource = 0;
98 dataSourceToBeReleased->Release();
99 }
100 }
101