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      1 /*
      2  * Copyright (C) 2013 Google, Inc.
      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 "core/xml/DocumentXPathEvaluator.h"
     28 
     29 #include "bindings/v8/ExceptionState.h"
     30 #include "core/dom/ScriptExecutionContext.h"
     31 #include "core/xml/XPathEvaluator.h"
     32 #include "core/xml/XPathExpression.h"
     33 #include "core/xml/XPathNSResolver.h"
     34 #include "core/xml/XPathResult.h"
     35 
     36 namespace WebCore {
     37 
     38 DocumentXPathEvaluator::DocumentXPathEvaluator()
     39 {
     40 }
     41 
     42 DocumentXPathEvaluator::~DocumentXPathEvaluator()
     43 {
     44 }
     45 
     46 DocumentXPathEvaluator* DocumentXPathEvaluator::from(ScriptExecutionContext* context)
     47 {
     48     DocumentXPathEvaluator* cache = static_cast<DocumentXPathEvaluator*>(Supplement<ScriptExecutionContext>::from(context, supplementName()));
     49     if (!cache) {
     50         cache = new DocumentXPathEvaluator();
     51         Supplement<ScriptExecutionContext>::provideTo(context, supplementName(), adoptPtr(cache));
     52     }
     53     return cache;
     54 }
     55 
     56 PassRefPtr<XPathExpression> DocumentXPathEvaluator::createExpression(ScriptExecutionContext* context,
     57     const String& expression, XPathNSResolver* resolver, ExceptionState& es)
     58 {
     59     DocumentXPathEvaluator* suplement = from(context);
     60     if (!suplement->m_xpathEvaluator)
     61         suplement->m_xpathEvaluator = XPathEvaluator::create();
     62     return suplement->m_xpathEvaluator->createExpression(expression, resolver, es);
     63 }
     64 
     65 PassRefPtr<XPathNSResolver> DocumentXPathEvaluator::createNSResolver(ScriptExecutionContext* context, Node* nodeResolver)
     66 {
     67     DocumentXPathEvaluator* suplement = from(context);
     68     if (!suplement->m_xpathEvaluator)
     69         suplement->m_xpathEvaluator = XPathEvaluator::create();
     70     return suplement->m_xpathEvaluator->createNSResolver(nodeResolver);
     71 }
     72 
     73 PassRefPtr<XPathResult> DocumentXPathEvaluator::evaluate(ScriptExecutionContext* context, const String& expression,
     74     Node* contextNode, XPathNSResolver* resolver, unsigned short type,
     75     XPathResult* result, ExceptionState& es)
     76 {
     77     DocumentXPathEvaluator* suplement = from(context);
     78     if (!suplement->m_xpathEvaluator)
     79         suplement->m_xpathEvaluator = XPathEvaluator::create();
     80     return suplement->m_xpathEvaluator->evaluate(expression, contextNode, resolver, type, result, es);
     81 }
     82 
     83 } // namespace WebCore
     84