1 /* 2 * Copyright (C) 2013 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/v8/ScriptPromise.h" 33 34 #include "bindings/v8/ScriptPromiseResolver.h" 35 #include "bindings/v8/V8Binding.h" 36 #include "core/dom/DOMException.h" 37 38 #include <v8.h> 39 40 namespace WebCore { 41 42 namespace { 43 44 struct WithScriptState { 45 // Used by ToV8Value<WithScriptState, ScriptState*>. 46 static v8::Handle<v8::Object> getCreationContext(ScriptState* scriptState) 47 { 48 return scriptState->context()->Global(); 49 } 50 }; 51 52 } // namespace 53 54 ScriptPromise::ScriptPromise(ScriptState* scriptState, v8::Handle<v8::Value> value) 55 : m_scriptState(scriptState) 56 { 57 if (value.IsEmpty()) 58 return; 59 60 if (!value->IsPromise()) { 61 m_promise = ScriptValue(scriptState, v8::Handle<v8::Value>()); 62 V8ThrowException::throwTypeError("the given value is not a Promise", scriptState->isolate()); 63 return; 64 } 65 m_promise = ScriptValue(scriptState, value); 66 } 67 68 ScriptPromise ScriptPromise::then(PassOwnPtr<ScriptFunction> onFulfilled, PassOwnPtr<ScriptFunction> onRejected) 69 { 70 if (m_promise.isEmpty()) 71 return ScriptPromise(); 72 73 v8::Local<v8::Object> promise = m_promise.v8Value().As<v8::Object>(); 74 v8::Local<v8::Function> v8OnFulfilled = ScriptFunction::adoptByGarbageCollector(onFulfilled); 75 v8::Local<v8::Function> v8OnRejected = ScriptFunction::adoptByGarbageCollector(onRejected); 76 77 ASSERT(promise->IsPromise()); 78 // Return this Promise if no handlers are given. 79 // In fact it is not the exact bahavior of Promise.prototype.then 80 // but that is not a problem in this case. 81 v8::Local<v8::Promise> resultPromise = promise.As<v8::Promise>(); 82 if (!v8OnFulfilled.IsEmpty()) { 83 resultPromise = resultPromise->Then(v8OnFulfilled); 84 if (resultPromise.IsEmpty()) { 85 // v8::Promise::Then may return an empty value, for example when 86 // the stack is exhausted. 87 return ScriptPromise(); 88 } 89 } 90 if (!v8OnRejected.IsEmpty()) 91 resultPromise = resultPromise->Catch(v8OnRejected); 92 93 return ScriptPromise(m_scriptState.get(), resultPromise); 94 } 95 96 ScriptPromise ScriptPromise::cast(ScriptState* scriptState, const ScriptValue& value) 97 { 98 return ScriptPromise::cast(scriptState, value.v8Value()); 99 } 100 101 ScriptPromise ScriptPromise::cast(ScriptState* scriptState, v8::Handle<v8::Value> value) 102 { 103 if (value.IsEmpty()) 104 return ScriptPromise(); 105 if (value->IsPromise()) { 106 return ScriptPromise(scriptState, value); 107 } 108 RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState); 109 ScriptPromise promise = resolver->promise(); 110 resolver->resolve(value); 111 return promise; 112 } 113 114 ScriptPromise ScriptPromise::reject(ScriptState* scriptState, const ScriptValue& value) 115 { 116 return ScriptPromise::reject(scriptState, value.v8Value()); 117 } 118 119 ScriptPromise ScriptPromise::reject(ScriptState* scriptState, v8::Handle<v8::Value> value) 120 { 121 if (value.IsEmpty()) 122 return ScriptPromise(); 123 RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState); 124 ScriptPromise promise = resolver->promise(); 125 resolver->reject(value); 126 return promise; 127 } 128 129 ScriptPromise ScriptPromise::rejectWithDOMException(ScriptState* scriptState, PassRefPtrWillBeRawPtr<DOMException> exception) 130 { 131 ASSERT(scriptState->isolate()->InContext()); 132 return reject(scriptState, ToV8Value<WithScriptState, v8::Handle<v8::Object> >::toV8Value(exception, scriptState->context()->Global(), scriptState->isolate())); 133 } 134 135 } // namespace WebCore 136