1 /* 2 * Copyright (C) 2008, 2009 Google Inc. 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 31 #include "config.h" 32 #include "V8NodeFilterCondition.h" 33 34 #include "Node.h" 35 #include "NodeFilter.h" 36 #include "ScriptState.h" 37 #include "V8Node.h" 38 #include "V8Proxy.h" 39 40 #include <wtf/OwnArrayPtr.h> 41 42 namespace WebCore { 43 44 V8NodeFilterCondition::V8NodeFilterCondition(v8::Handle<v8::Value> filter) 45 : m_filter(v8::Persistent<v8::Value>::New(filter)) 46 { 47 #ifndef NDEBUG 48 V8GCController::registerGlobalHandle(NODE_FILTER, this, m_filter); 49 #endif 50 } 51 52 V8NodeFilterCondition::~V8NodeFilterCondition() 53 { 54 #ifndef NDEBUG 55 V8GCController::unregisterGlobalHandle(this, m_filter); 56 #endif 57 m_filter.Dispose(); 58 m_filter.Clear(); 59 } 60 61 short V8NodeFilterCondition::acceptNode(ScriptState* state, Node* node) const 62 { 63 ASSERT(v8::Context::InContext()); 64 65 if (!m_filter->IsObject()) 66 return NodeFilter::FILTER_ACCEPT; 67 68 v8::TryCatch exceptionCatcher; 69 70 v8::Handle<v8::Function> callback; 71 if (m_filter->IsFunction()) 72 callback = v8::Handle<v8::Function>::Cast(m_filter); 73 else { 74 v8::Local<v8::Value> value = m_filter->ToObject()->Get(v8::String::New("acceptNode")); 75 if (!value->IsFunction()) { 76 V8Proxy::throwError(V8Proxy::TypeError, "NodeFilter object does not have an acceptNode function"); 77 return NodeFilter::FILTER_REJECT; 78 } 79 callback = v8::Handle<v8::Function>::Cast(value); 80 } 81 82 v8::Handle<v8::Object> object = v8::Context::GetCurrent()->Global(); 83 OwnArrayPtr<v8::Handle<v8::Value> > args = adoptArrayPtr(new v8::Handle<v8::Value>[1]); 84 args[0] = toV8(node); 85 86 v8::Handle<v8::Value> result = V8Proxy::callFunctionWithoutFrame(callback, object, 1, args.get()); 87 88 if (exceptionCatcher.HasCaught()) { 89 state->setException(exceptionCatcher.Exception()); 90 return NodeFilter::FILTER_REJECT; 91 } 92 93 ASSERT(!result.IsEmpty()); 94 95 return result->Int32Value(); 96 } 97 98 } // namespace WebCore 99
