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