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WebDocumentLoader.cpp
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99 lines (88 loc) · 3.41 KB
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/*
* Copyright (C) 2007 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "WebDocumentLoader.h"
#include "WebKitDLL.h"
using namespace WebCore;
WebDocumentLoader::WebDocumentLoader(const ResourceRequest& request, const SubstituteData& substituteData)
: DocumentLoader(request, substituteData)
, m_dataSource(0)
, m_detachedDataSource(0)
{
gClassCount++;
gClassNameCount().add("WebDocumentLoader");
}
Ref<WebDocumentLoader> WebDocumentLoader::create(const ResourceRequest& request, const SubstituteData& data)
{
return adoptRef(*new WebDocumentLoader(request, data));
}
WebDocumentLoader::~WebDocumentLoader()
{
gClassCount--;
gClassNameCount().remove("WebDocumentLoader");
if (m_dataSource) {
ASSERT(!m_detachedDataSource);
m_dataSource->Release();
}
}
void WebDocumentLoader::setDataSource(WebDataSource *dataSource)
{
ASSERT(!m_dataSource);
m_dataSource = dataSource;
if (m_dataSource)
m_dataSource->AddRef();
}
WebDataSource* WebDocumentLoader::dataSource() const
{
return m_dataSource;
}
void WebDocumentLoader::detachDataSource()
{
// we only call detachDataSource when the WebDataSource is freed - and we won't get there if m_dataSource is not
// null (because that would mean the loader still has a reference to the data source)
ASSERT(!m_dataSource);
m_detachedDataSource = 0;
}
void WebDocumentLoader::attachToFrame()
{
DocumentLoader::attachToFrame();
if (m_detachedDataSource) {
ASSERT(!m_dataSource);
setDataSource(m_detachedDataSource);
m_detachedDataSource = 0;
}
}
void WebDocumentLoader::detachFromFrame()
{
DocumentLoader::detachFromFrame();
m_detachedDataSource = m_dataSource;
if (m_dataSource) {
WebDataSource* dataSourceToBeReleased = m_dataSource;
// It's important to null out m_dataSource before calling release on the data source. That release can cause the data
// source to be deleted - which ends up calling loader->detachDataSource() which makes the assumption that the loader no
// longer holds a reference to the data source.
m_dataSource = 0;
dataSourceToBeReleased->Release();
}
}