1 /* 2 * Copyright (C) 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 "bindings/core/v8/ScriptEventListener.h" 33 34 #include "bindings/core/v8/ScriptController.h" 35 #include "bindings/core/v8/ScriptState.h" 36 #include "bindings/core/v8/V8AbstractEventListener.h" 37 #include "bindings/core/v8/V8Binding.h" 38 #include "bindings/core/v8/WindowProxy.h" 39 #include "core/dom/Document.h" 40 #include "core/dom/DocumentParser.h" 41 #include "core/dom/QualifiedName.h" 42 #include "core/events/EventListener.h" 43 #include "core/frame/LocalFrame.h" 44 #include <v8.h> 45 46 namespace blink { 47 48 PassRefPtr<V8LazyEventListener> createAttributeEventListener(Node* node, const QualifiedName& name, const AtomicString& value, const AtomicString& eventParameterName) 49 { 50 ASSERT(node); 51 if (value.isNull()) 52 return nullptr; 53 54 // FIXME: Very strange: we initialize zero-based number with '1'. 55 TextPosition position(OrdinalNumber::fromZeroBasedInt(1), OrdinalNumber::first()); 56 String sourceURL; 57 58 v8::Isolate* isolate; 59 if (LocalFrame* frame = node->document().frame()) { 60 isolate = toIsolate(frame); 61 ScriptController& scriptController = frame->script(); 62 if (!scriptController.canExecuteScripts(AboutToExecuteScript)) 63 return nullptr; 64 position = scriptController.eventHandlerPosition(); 65 sourceURL = node->document().url().string(); 66 } else { 67 isolate = v8::Isolate::GetCurrent(); 68 } 69 70 return V8LazyEventListener::create(name.localName(), eventParameterName, value, sourceURL, position, node, isolate); 71 } 72 73 PassRefPtr<V8LazyEventListener> createAttributeEventListener(LocalFrame* frame, const QualifiedName& name, const AtomicString& value, const AtomicString& eventParameterName) 74 { 75 if (!frame) 76 return nullptr; 77 78 if (value.isNull()) 79 return nullptr; 80 81 ScriptController& scriptController = frame->script(); 82 if (!scriptController.canExecuteScripts(AboutToExecuteScript)) 83 return nullptr; 84 85 TextPosition position = scriptController.eventHandlerPosition(); 86 String sourceURL = frame->document()->url().string(); 87 88 return V8LazyEventListener::create(name.localName(), eventParameterName, value, sourceURL, position, 0, toIsolate(frame)); 89 } 90 91 static v8::Handle<v8::Function> eventListenerEffectiveFunction(v8::Isolate* isolate, v8::Handle<v8::Object> listenerObject) 92 { 93 v8::Handle<v8::Function> function; 94 if (listenerObject->IsFunction()) { 95 function = v8::Handle<v8::Function>::Cast(listenerObject); 96 } else if (listenerObject->IsObject()) { 97 // Try the "handleEvent" method (EventListener interface). 98 v8::Handle<v8::Value> property = listenerObject->Get(v8AtomicString(isolate, "handleEvent")); 99 if (property.IsEmpty() || !property->IsFunction()) { 100 // Fall back to the "constructor" property. 101 property = listenerObject->Get(v8AtomicString(isolate, "constructor")); 102 } 103 if (!property.IsEmpty() && property->IsFunction()) 104 function = v8::Handle<v8::Function>::Cast(property); 105 } 106 return function; 107 } 108 109 String eventListenerHandlerBody(Document* document, EventListener* listener) 110 { 111 if (listener->type() != EventListener::JSEventListenerType) 112 return ""; 113 114 v8::HandleScope scope(toIsolate(document)); 115 V8AbstractEventListener* v8Listener = static_cast<V8AbstractEventListener*>(listener); 116 v8::Handle<v8::Context> context = toV8Context(document, v8Listener->world()); 117 v8::Context::Scope contextScope(context); 118 v8::Handle<v8::Object> object = v8Listener->getListenerObject(document); 119 if (object.IsEmpty()) 120 return ""; 121 v8::Handle<v8::Function> function = eventListenerEffectiveFunction(scope.GetIsolate(), object); 122 if (function.IsEmpty()) 123 return ""; 124 125 TOSTRING_DEFAULT(V8StringResource<TreatNullAsNullString>, functionString, function, ""); 126 return functionString; 127 } 128 129 ScriptValue eventListenerHandler(Document* document, EventListener* listener) 130 { 131 if (listener->type() != EventListener::JSEventListenerType) 132 return ScriptValue(); 133 134 v8::Isolate* isolate = toIsolate(document); 135 v8::HandleScope scope(isolate); 136 V8AbstractEventListener* v8Listener = static_cast<V8AbstractEventListener*>(listener); 137 v8::Handle<v8::Context> context = toV8Context(document, v8Listener->world()); 138 v8::Context::Scope contextScope(context); 139 v8::Handle<v8::Object> function = v8Listener->getListenerObject(document); 140 if (function.IsEmpty()) 141 return ScriptValue(); 142 return ScriptValue(ScriptState::from(context), function); 143 } 144 145 ScriptState* eventListenerHandlerScriptState(LocalFrame* frame, EventListener* listener) 146 { 147 if (listener->type() != EventListener::JSEventListenerType) 148 return 0; 149 V8AbstractEventListener* v8Listener = static_cast<V8AbstractEventListener*>(listener); 150 v8::HandleScope scope(toIsolate(frame)); 151 v8::Handle<v8::Context> v8Context = frame->script().windowProxy(v8Listener->world())->context(); 152 return ScriptState::from(v8Context); 153 } 154 155 bool eventListenerHandlerLocation(Document* document, EventListener* listener, String& sourceName, String& scriptId, int& lineNumber, int& columnNumber) 156 { 157 if (listener->type() != EventListener::JSEventListenerType) 158 return false; 159 160 v8::HandleScope scope(toIsolate(document)); 161 V8AbstractEventListener* v8Listener = static_cast<V8AbstractEventListener*>(listener); 162 v8::Handle<v8::Context> context = toV8Context(document, v8Listener->world()); 163 v8::Context::Scope contextScope(context); 164 v8::Local<v8::Object> object = v8Listener->getListenerObject(document); 165 if (object.IsEmpty()) 166 return false; 167 v8::Handle<v8::Function> function = eventListenerEffectiveFunction(scope.GetIsolate(), object); 168 if (function.IsEmpty()) 169 return false; 170 v8::Handle<v8::Function> originalFunction = getBoundFunction(function); 171 int scriptIdValue = originalFunction->ScriptId(); 172 scriptId = String::number(scriptIdValue); 173 v8::ScriptOrigin origin = originalFunction->GetScriptOrigin(); 174 if (!origin.ResourceName().IsEmpty() && origin.ResourceName()->IsString()) 175 sourceName = toCoreString(origin.ResourceName().As<v8::String>()); 176 else 177 sourceName = ""; 178 lineNumber = originalFunction->GetScriptLineNumber(); 179 columnNumber = originalFunction->GetScriptColumnNumber(); 180 return true; 181 } 182 183 } // namespace blink 184