1 /* 2 * Copyright (C) 2012 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 V8Callback_h 32 #define V8Callback_h 33 34 #include "bindings/v8/ExceptionState.h" 35 #include "bindings/v8/V8Binding.h" 36 #include "core/dom/ExceptionCode.h" 37 #include <v8.h> 38 39 namespace WebCore { 40 41 class ExecutionContext; 42 43 // Returns false if the callback threw an exception, true otherwise. 44 bool invokeCallback(ScriptState*, v8::Local<v8::Function> callback, int argc, v8::Handle<v8::Value> argv[]); 45 bool invokeCallback(ScriptState*, v8::Local<v8::Function> callback, v8::Handle<v8::Value> thisValue, int argc, v8::Handle<v8::Value> argv[]); 46 47 // FIXME: This file is used only by V8GeolocationCustom.cpp. Remove the custom binding and this file. 48 enum CallbackAllowedValueFlag { 49 CallbackAllowUndefined = 1, 50 CallbackAllowNull = 1 << 1 51 }; 52 53 typedef unsigned CallbackAllowedValueFlags; 54 55 // 'FunctionOnly' is assumed for the created callback. 56 template <typename V8CallbackType> 57 PassOwnPtr<V8CallbackType> createFunctionOnlyCallback(v8::Local<v8::Value> value, unsigned index, bool& succeeded, v8::Isolate* isolate, ExceptionState& exceptionState, CallbackAllowedValueFlags acceptedValues = 0) 58 { 59 succeeded = true; 60 61 if (value->IsUndefined() && (acceptedValues & CallbackAllowUndefined)) 62 return nullptr; 63 64 if (value->IsNull() && (acceptedValues & CallbackAllowNull)) 65 return nullptr; 66 67 if (!value->IsFunction()) { 68 succeeded = false; 69 exceptionState.throwDOMException(TypeMismatchError, ExceptionMessages::argumentNullOrIncorrectType(index, "Function")); 70 exceptionState.throwIfNeeded(); 71 return nullptr; 72 } 73 74 return V8CallbackType::create(v8::Handle<v8::Function>::Cast(value), ScriptState::current(isolate)); 75 } 76 77 } // namespace WebCore 78 79 #endif // V8Callback_h 80