1 // Copyright (c) 2008, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 #include "config.h" 31 #include "V8CustomXPathNSResolver.h" 32 33 #if ENABLE(XPATH) 34 35 #include "PlatformString.h" 36 #include "V8Binding.h" 37 #include "V8Proxy.h" 38 39 namespace WebCore { 40 41 PassRefPtr<V8CustomXPathNSResolver> V8CustomXPathNSResolver::create(V8Proxy* proxy, v8::Handle<v8::Object> resolver) 42 { 43 return adoptRef(new V8CustomXPathNSResolver(proxy, resolver)); 44 } 45 46 V8CustomXPathNSResolver::V8CustomXPathNSResolver(V8Proxy* proxy, v8::Handle<v8::Object> resolver) 47 : m_proxy(proxy) 48 , m_resolver(resolver) 49 { 50 } 51 52 V8CustomXPathNSResolver::~V8CustomXPathNSResolver() 53 { 54 } 55 56 String V8CustomXPathNSResolver::lookupNamespaceURI(const String& prefix) 57 { 58 V8Proxy* proxy = m_proxy; 59 60 if (!proxy) { 61 proxy = V8Proxy::retrieve(); 62 if (!proxy) 63 return String(); 64 } 65 66 v8::Handle<v8::Function> lookupNamespaceURIFunc; 67 v8::Handle<v8::String> lookupNamespaceURIName = v8::String::New("lookupNamespaceURI"); 68 69 // Check if the resolver has a function property named lookupNamespaceURI. 70 if (m_resolver->Has(lookupNamespaceURIName)) { 71 v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(lookupNamespaceURIName); 72 if (lookupNamespaceURI->IsFunction()) 73 lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(lookupNamespaceURI); 74 } 75 76 if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) { 77 Frame* frame = proxy->frame(); 78 logInfo(frame, "XPathNSResolver does not have a lookupNamespaceURI method.", String()); 79 return String(); 80 } 81 82 // Catch exceptions from calling the namespace resolver. 83 v8::TryCatch try_catch; 84 try_catch.SetVerbose(true); // Print exceptions to console. 85 86 const int argc = 1; 87 v8::Handle<v8::Value> argv[argc] = { v8String(prefix) }; 88 v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty() ? v8::Handle<v8::Function>::Cast(m_resolver) : lookupNamespaceURIFunc; 89 90 v8::Handle<v8::Value> retval = proxy->callFunction(function, m_resolver, argc, argv); 91 92 // Eat exceptions from namespace resolver and return an empty string. This will most likely cause NAMESPACE_ERR. 93 if (try_catch.HasCaught()) 94 return String(); 95 96 return toWebCoreStringWithNullCheck(retval); 97 } 98 99 } // namespace WebCore 100 101 #endif // ENABLE(XPATH) 102