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/*
* Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006, 2009 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 THE AUTHOR ``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 THE AUTHOR 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 "third_party/blink/renderer/core/xml/xpath_expression.h"
#include "third_party/blink/renderer/core/xml/xpath_expression_node.h"
#include "third_party/blink/renderer/core/xml/xpath_ns_resolver.h"
#include "third_party/blink/renderer/core/xml/xpath_parser.h"
#include "third_party/blink/renderer/core/xml/xpath_result.h"
#include "third_party/blink/renderer/core/xml/xpath_util.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
XPathExpression::XPathExpression() = default;
XPathExpression* XPathExpression::CreateExpression(
const String& expression,
XPathNSResolver* resolver,
ExceptionState& exception_state) {
auto* expr = MakeGarbageCollected<XPathExpression>();
xpath::Parser parser;
expr->top_expression_ =
parser.ParseStatement(expression, resolver, exception_state);
if (!expr->top_expression_)
return nullptr;
return expr;
}
void XPathExpression::Trace(Visitor* visitor) {
visitor->Trace(top_expression_);
ScriptWrappable::Trace(visitor);
}
XPathResult* XPathExpression::evaluate(Node* context_node,
uint16_t type,
const ScriptValue&,
ExceptionState& exception_state) {
if (!xpath::IsValidContextNode(context_node)) {
exception_state.ThrowDOMException(
DOMExceptionCode::kNotSupportedError,
"The node provided is '" + context_node->nodeName() +
"', which is not a valid context node type.");
return nullptr;
}
bool had_type_conversion_error = false;
xpath::EvaluationContext evaluation_context(*context_node,
had_type_conversion_error);
auto* result = MakeGarbageCollected<XPathResult>(
evaluation_context, top_expression_->Evaluate(evaluation_context));
if (had_type_conversion_error) {
// It is not specified what to do if type conversion fails while evaluating
// an expression.
exception_state.ThrowDOMException(
DOMExceptionCode::kSyntaxError,
"Type conversion failed while evaluating the expression.");
return nullptr;
}
if (type != XPathResult::kAnyType) {
result->ConvertTo(type, exception_state);
if (exception_state.HadException())
return nullptr;
}
return result;
}
} // namespace blink
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