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/*
* Copyright (C) 2016-2021 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. AND ITS CONTRIBUTORS ``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 ITS 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 "config.h"
#include "StaticRange.h"
#include "ContainerNode.h"
#include "JSNode.h"
#include "Text.h"
#include "WebCoreOpaqueRootInlines.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(StaticRange);
StaticRange::StaticRange(SimpleRange&& range)
: SimpleRange(WTFMove(range))
{
}
Ref<StaticRange> StaticRange::create(SimpleRange&& range)
{
return adoptRef(*new StaticRange(WTFMove(range)));
}
Ref<StaticRange> StaticRange::create(const SimpleRange& range)
{
auto copiedRange = range;
return create(WTFMove(copiedRange));
}
static bool isDocumentTypeOrAttr(Node& node)
{
// Before calling nodeType, do two fast non-virtual checks that cover almost all normal nodes, but are false for DocumentType and Attr.
if (is<ContainerNode>(node) || is<Text>(node))
return false;
// Call nodeType explicitly and use a switch so we don't have to call it twice.
switch (node.nodeType()) {
case Node::ATTRIBUTE_NODE:
case Node::DOCUMENT_TYPE_NODE:
return true;
default:
return false;
}
}
ExceptionOr<Ref<StaticRange>> StaticRange::create(Init&& init)
{
ASSERT(init.startContainer);
ASSERT(init.endContainer);
if (isDocumentTypeOrAttr(*init.startContainer) || isDocumentTypeOrAttr(*init.endContainer))
return Exception { InvalidNodeTypeError };
return create({ { init.startContainer.releaseNonNull(), init.startOffset }, { init.endContainer.releaseNonNull(), init.endOffset } });
}
void StaticRange::visitNodesConcurrently(JSC::AbstractSlotVisitor& visitor) const
{
addWebCoreOpaqueRoot(visitor, start.container.get());
addWebCoreOpaqueRoot(visitor, end.container.get());
}
bool StaticRange::computeValidity() const
{
Node& startContainer = this->startContainer();
Node& endContainer = this->endContainer();
if (!connectedInSameTreeScope(&startContainer.rootNode(), &endContainer.rootNode()))
return false;
if (startOffset() > startContainer.length())
return false;
if (endOffset() > endContainer.length())
return false;
if (&startContainer == &endContainer)
return endOffset() > startOffset();
return !is_gt(treeOrder<ComposedTree>(startContainer, endContainer));
}
} // namespace WebCore
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