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 #ifndef ScriptPromise_h 32 #define ScriptPromise_h 33 34 #include "bindings/core/v8/ScriptFunction.h" 35 #include "bindings/core/v8/ScriptValue.h" 36 #include "bindings/core/v8/V8ThrowException.h" 37 #include "core/dom/ExceptionCode.h" 38 #include "platform/heap/Handle.h" 39 #include "wtf/PassOwnPtr.h" 40 #include "wtf/PassRefPtr.h" 41 #include "wtf/text/WTFString.h" 42 #include <v8.h> 43 44 namespace blink { 45 46 class DOMException; 47 class ExceptionState; 48 49 // ScriptPromise is the class for representing Promise values in C++ world. 50 // ScriptPromise holds a Promise. 51 // So holding a ScriptPromise as a member variable in DOM object causes 52 // memory leaks since it has a reference from C++ to V8. 53 // 54 class ScriptPromise FINAL { 55 public: 56 // Constructs an empty promise. 57 ScriptPromise() { } 58 59 // Constructs a ScriptPromise from |promise|. 60 // If |promise| is not a Promise object, throws a v8 TypeError. 61 ScriptPromise(ScriptState*, v8::Handle<v8::Value> promise); 62 63 ScriptPromise then(v8::Handle<v8::Function> onFulfilled, v8::Handle<v8::Function> onRejected = v8::Handle<v8::Function>()); 64 65 bool isObject() const 66 { 67 return m_promise.isObject(); 68 } 69 70 bool isNull() const 71 { 72 return m_promise.isNull(); 73 } 74 75 bool isUndefinedOrNull() const 76 { 77 return m_promise.isUndefined() || m_promise.isNull(); 78 } 79 80 v8::Handle<v8::Value> v8Value() const 81 { 82 return m_promise.v8Value(); 83 } 84 85 v8::Isolate* isolate() const 86 { 87 return m_promise.isolate(); 88 } 89 90 bool isEmpty() const 91 { 92 return m_promise.isEmpty(); 93 } 94 95 void clear() 96 { 97 m_promise.clear(); 98 } 99 100 bool operator==(const ScriptPromise& value) const 101 { 102 return m_promise == value.m_promise; 103 } 104 105 bool operator!=(const ScriptPromise& value) const 106 { 107 return !operator==(value); 108 } 109 110 // Constructs and returns a ScriptPromise from |value|. 111 // if |value| is not a Promise object, returns a Promise object 112 // resolved with |value|. 113 // Returns |value| itself if it is a Promise. 114 static ScriptPromise cast(ScriptState*, const ScriptValue& /*value*/); 115 static ScriptPromise cast(ScriptState*, v8::Handle<v8::Value> /*value*/); 116 117 static ScriptPromise reject(ScriptState*, const ScriptValue&); 118 static ScriptPromise reject(ScriptState*, v8::Handle<v8::Value>); 119 120 static ScriptPromise rejectWithDOMException(ScriptState*, PassRefPtrWillBeRawPtr<DOMException>); 121 122 static v8::Local<v8::Promise> rejectRaw(v8::Isolate*, v8::Handle<v8::Value>); 123 124 // This is a utility class intended to be used internally. 125 // ScriptPromiseResolver is for general purpose. 126 class InternalResolver FINAL { 127 public: 128 explicit InternalResolver(ScriptState*); 129 v8::Local<v8::Promise> v8Promise() const; 130 ScriptPromise promise() const; 131 void resolve(v8::Local<v8::Value>); 132 void reject(v8::Local<v8::Value>); 133 void clear() { m_resolver.clear(); } 134 135 private: 136 ScriptValue m_resolver; 137 }; 138 139 private: 140 RefPtr<ScriptState> m_scriptState; 141 ScriptValue m_promise; 142 }; 143 144 } // namespace blink 145 146 147 #endif // ScriptPromise_h 148