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 ScriptFunction_h 32 #define ScriptFunction_h 33 34 #include "bindings/core/v8/ScriptValue.h" 35 #include "platform/heap/Handle.h" 36 #include <v8.h> 37 38 namespace blink { 39 40 // A common way of using ScriptFunction is as follows: 41 // 42 // class DerivedFunction : public ScriptFunction { 43 // // This returns a V8 function which the DerivedFunction is bound to. 44 // // The DerivedFunction is destructed when the V8 function is 45 // // garbage-collected. 46 // static v8::Handle<v8::Function> createFunction(ScriptState* scriptState) 47 // { 48 // DerivedFunction* self = new DerivedFunction(scriptState); 49 // return self->bindToV8Function(); 50 // } 51 // }; 52 class ScriptFunction : public GarbageCollectedFinalized<ScriptFunction> { 53 public: 54 virtual ~ScriptFunction() { } 55 ScriptState* scriptState() const { return m_scriptState.get(); } 56 virtual void trace(Visitor*) { } 57 58 protected: 59 explicit ScriptFunction(ScriptState* scriptState) 60 : m_scriptState(scriptState) 61 { 62 } 63 64 v8::Handle<v8::Function> bindToV8Function(); 65 66 private: 67 virtual ScriptValue call(ScriptValue) = 0; 68 static void callCallback(const v8::FunctionCallbackInfo<v8::Value>&); 69 70 RefPtr<ScriptState> m_scriptState; 71 }; 72 73 } // namespace blink 74 75 #endif 76
