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      1 /*
      2  * Copyright 2005 Frerich Raabe <raabe (at) kde.org>
      3  * Copyright (C) 2006 Apple Computer, Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "XPathEvaluator.h"
     29 
     30 #if ENABLE(XPATH)
     31 
     32 #include "ExceptionCode.h"
     33 #include "NativeXPathNSResolver.h"
     34 #include "Node.h"
     35 #include "XPathExpression.h"
     36 #include "XPathResult.h"
     37 #include "XPathUtil.h"
     38 
     39 namespace WebCore {
     40 
     41 using namespace XPath;
     42 
     43 PassRefPtr<XPathExpression> XPathEvaluator::createExpression(const String& expression,
     44                                                              XPathNSResolver* resolver,
     45                                                              ExceptionCode& ec)
     46 {
     47     return XPathExpression::createExpression(expression, resolver, ec);
     48 }
     49 
     50 PassRefPtr<XPathNSResolver> XPathEvaluator::createNSResolver(Node* nodeResolver)
     51 {
     52     return NativeXPathNSResolver::create(nodeResolver);
     53 }
     54 
     55 PassRefPtr<XPathResult> XPathEvaluator::evaluate(const String& expression,
     56                                                  Node* contextNode,
     57                                                  XPathNSResolver* resolver,
     58                                                  unsigned short type,
     59                                                  XPathResult* result,
     60                                                  ExceptionCode& ec)
     61 {
     62     if (!isValidContextNode(contextNode)) {
     63         ec = NOT_SUPPORTED_ERR;
     64         return 0;
     65     }
     66 
     67     ec = 0;
     68     RefPtr<XPathExpression> expr = createExpression(expression, resolver, ec);
     69     if (ec)
     70         return 0;
     71 
     72     return expr->evaluate(contextNode, type, result, ec);
     73 }
     74 
     75 }
     76 
     77 #endif // ENABLE(XPATH)
     78