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(v8::Handle<v8::Object> resolver) 42 { 43 return adoptRef(new V8CustomXPathNSResolver(resolver)); 44 } 45 46 V8CustomXPathNSResolver::V8CustomXPathNSResolver(v8::Handle<v8::Object> resolver) 47 : m_resolver(resolver) 48 { 49 } 50 51 V8CustomXPathNSResolver::~V8CustomXPathNSResolver() 52 { 53 } 54 55 String V8CustomXPathNSResolver::lookupNamespaceURI(const String& prefix) 56 { 57 v8::Handle<v8::Function> lookupNamespaceURIFunc; 58 v8::Handle<v8::String> lookupNamespaceURIName = v8::String::New("lookupNamespaceURI"); 59 60 // Check if the resolver has a function property named lookupNamespaceURI. 61 if (m_resolver->Has(lookupNamespaceURIName)) { 62 v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(lookupNamespaceURIName); 63 if (lookupNamespaceURI->IsFunction()) 64 lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(lookupNamespaceURI); 65 } 66 67 if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) { 68 if (V8Proxy* proxy = V8Proxy::retrieve()) { 69 if (Frame* frame = proxy->frame()) 70 logInfo(frame, "XPathNSResolver does not have a lookupNamespaceURI method.", String()); 71 } 72 return String(); 73 } 74 75 // Catch exceptions from calling the namespace resolver. 76 v8::TryCatch try_catch; 77 try_catch.SetVerbose(true); // Print exceptions to console. 78 79 const int argc = 1; 80 v8::Handle<v8::Value> argv[argc] = { v8String(prefix) }; 81 v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty() ? v8::Handle<v8::Function>::Cast(m_resolver) : lookupNamespaceURIFunc; 82 83 v8::Handle<v8::Value> retval = V8Proxy::callFunctionWithoutFrame(function, m_resolver, argc, argv); 84 85 // Eat exceptions from namespace resolver and return an empty string. This will most likely cause NAMESPACE_ERR. 86 if (try_catch.HasCaught()) 87 return String(); 88 89 return toWebCoreStringWithNullCheck(retval); 90 } 91 92 } // namespace WebCore 93 94 #endif // ENABLE(XPATH) 95
