1 /* 2 * Copyright (C) 2006, 2007, 2008, 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 #ifndef V8Utilities_h 32 #define V8Utilities_h 33 34 #if ENABLE(V8_LOCKERS) 35 // TODO(benm): Need to re-add in locking for V8. We lost some of the lock points during the merge. Define it to void here so we don't lock some of the time. 36 #define LOCK_V8 ((void) 0) 37 #else 38 #define LOCK_V8 ((void) 0) 39 #endif 40 41 #include <v8.h> 42 43 namespace WebCore { 44 45 class Frame; 46 class KURL; 47 class String; 48 49 // Use an array to hold dependents. It works like a ref-counted scheme. A value can be added more than once to the DOM object. 50 void createHiddenDependency(v8::Local<v8::Object>, v8::Local<v8::Value>, int cacheIndex); 51 void removeHiddenDependency(v8::Local<v8::Object>, v8::Local<v8::Value>, int cacheIndex); 52 53 bool processingUserGesture(); 54 bool shouldAllowNavigation(Frame*); 55 KURL completeURL(const String& relativeURL); 56 void navigateIfAllowed(Frame*, const KURL&, bool lockHistory, bool lockBackForwardList); 57 58 class AllowAllocation { 59 public: AllowAllocation()60 inline AllowAllocation() 61 { 62 m_previous = m_current; 63 m_current = true; 64 } 65 ~AllowAllocation()66 inline ~AllowAllocation() 67 { 68 m_current = m_previous; 69 } 70 71 static bool m_current; 72 73 private: 74 bool m_previous; 75 }; 76 77 class SafeAllocation { 78 public: 79 static inline v8::Local<v8::Object> newInstance(v8::Handle<v8::Function>); 80 static inline v8::Local<v8::Object> newInstance(v8::Handle<v8::ObjectTemplate>); 81 static inline v8::Local<v8::Object> newInstance(v8::Handle<v8::Function>, int argc, v8::Handle<v8::Value> argv[]); 82 }; 83 newInstance(v8::Handle<v8::Function> function)84 v8::Local<v8::Object> SafeAllocation::newInstance(v8::Handle<v8::Function> function) 85 { 86 if (function.IsEmpty()) 87 return v8::Local<v8::Object>(); 88 AllowAllocation allow; 89 return function->NewInstance(); 90 } 91 newInstance(v8::Handle<v8::ObjectTemplate> objectTemplate)92 v8::Local<v8::Object> SafeAllocation::newInstance(v8::Handle<v8::ObjectTemplate> objectTemplate) 93 { 94 if (objectTemplate.IsEmpty()) 95 return v8::Local<v8::Object>(); 96 AllowAllocation allow; 97 return objectTemplate->NewInstance(); 98 } 99 newInstance(v8::Handle<v8::Function> function,int argc,v8::Handle<v8::Value> argv[])100 v8::Local<v8::Object> SafeAllocation::newInstance(v8::Handle<v8::Function> function, int argc, v8::Handle<v8::Value> argv[]) 101 { 102 if (function.IsEmpty()) 103 return v8::Local<v8::Object>(); 104 AllowAllocation allow; 105 return function->NewInstance(argc, argv); 106 } 107 108 } // namespace WebCore 109 110 #endif // V8Utilities_h 111