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 "bindings/v8/custom/V8CustomXPathNSResolver.h" 32 33 #include "bindings/v8/ScriptController.h" 34 #include "bindings/v8/V8Binding.h" 35 #include "core/dom/ExecutionContext.h" 36 #include "core/frame/LocalDOMWindow.h" 37 #include "core/frame/FrameConsole.h" 38 #include "core/frame/FrameHost.h" 39 #include "core/frame/LocalFrame.h" 40 #include "core/inspector/ScriptCallStack.h" 41 #include "wtf/text/WTFString.h" 42 43 namespace WebCore { 44 45 PassRefPtrWillBeRawPtr<V8CustomXPathNSResolver> V8CustomXPathNSResolver::create(v8::Handle<v8::Object> resolver, v8::Isolate* isolate) 46 { 47 return adoptRefWillBeNoop(new V8CustomXPathNSResolver(resolver, isolate)); 48 } 49 50 V8CustomXPathNSResolver::V8CustomXPathNSResolver(v8::Handle<v8::Object> resolver, v8::Isolate* isolate) 51 : m_resolver(resolver) 52 , m_isolate(isolate) 53 { 54 } 55 56 V8CustomXPathNSResolver::~V8CustomXPathNSResolver() 57 { 58 } 59 60 AtomicString V8CustomXPathNSResolver::lookupNamespaceURI(const String& prefix) 61 { 62 v8::Handle<v8::Function> lookupNamespaceURIFunc; 63 v8::Handle<v8::String> lookupNamespaceURIName = v8AtomicString(m_isolate, "lookupNamespaceURI"); 64 65 // Check if the resolver has a function property named lookupNamespaceURI. 66 if (m_resolver->Has(lookupNamespaceURIName)) { 67 v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(lookupNamespaceURIName); 68 if (lookupNamespaceURI->IsFunction()) 69 lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(lookupNamespaceURI); 70 } 71 72 if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) { 73 LocalFrame* frame = callingDOMWindow(m_isolate)->frame(); 74 if (frame && frame->host()) 75 frame->console().addMessage(JSMessageSource, ErrorMessageLevel, "XPathNSResolver does not have a lookupNamespaceURI method."); 76 return nullAtom; 77 } 78 79 // Catch exceptions from calling the namespace resolver. 80 v8::TryCatch tryCatch; 81 tryCatch.SetVerbose(true); // Print exceptions to console. 82 83 const int argc = 1; 84 v8::Handle<v8::Value> argv[argc] = { v8String(m_isolate, prefix) }; 85 v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty() ? v8::Handle<v8::Function>::Cast(m_resolver) : lookupNamespaceURIFunc; 86 87 v8::Handle<v8::Value> retval = ScriptController::callFunction(callingExecutionContext(m_isolate), function, m_resolver, argc, argv, m_isolate); 88 89 // Eat exceptions from namespace resolver and return an empty string. This will most likely cause NamespaceError. 90 if (tryCatch.HasCaught()) 91 return nullAtom; 92 93 TOSTRING_DEFAULT(V8StringResource<WithNullCheck>, returnString, retval, nullAtom); 94 return returnString; 95 } 96 97 void V8CustomXPathNSResolver::trace(Visitor* visitor) 98 { 99 XPathNSResolver::trace(visitor); 100 } 101 102 } // namespace WebCore 103