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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef GPU_NP_UTILS_NP_CLASS_H_ | |
| 6 #define GPU_NP_UTILS_NP_CLASS_H_ | |
| 7 | |
| 8 #include "gpu/np_utils/np_object_pointer.h" | |
| 9 #include "gpu/np_utils/np_headers.h" | |
| 10 | |
| 11 // This file implements NPGetClass<T>. This function returns an NPClass | |
| 12 // that can be used to instantiate an NPObject subclass T. The NPClass | |
| 13 // function pointers will invoke the most derived corresponding member | |
| 14 // functions in T. | |
| 15 | |
| 16 namespace np_utils { | |
| 17 | |
| 18 namespace np_class_impl { | |
| 19 // This template version of the NPClass allocate function creates a subclass | |
| 20 // of BaseNPObject. | |
| 21 template <typename NPObjectType> | |
| 22 static NPObject* Allocate(NPP npp, NPClass*) { | |
| 23 return new NPObjectType(npp); | |
| 24 } | |
| 25 | |
| 26 // These implementations of the NPClass functions forward to the virtual | |
| 27 // functions in DefaultNPObject. | |
| 28 template <typename NPObjectType> | |
| 29 static void Deallocate(NPObject* object) { | |
| 30 delete static_cast<NPObjectType*>(object); | |
| 31 } | |
| 32 | |
| 33 template <typename NPObjectType> | |
| 34 static void Invalidate(NPObject* object) { | |
| 35 return static_cast<NPObjectType*>(object)->Invalidate(); | |
| 36 } | |
| 37 | |
| 38 template <typename NPObjectType> | |
| 39 static bool HasMethod(NPObject* object, NPIdentifier name) { | |
| 40 return static_cast<NPObjectType*>(object)->HasMethod(name); | |
| 41 } | |
| 42 | |
| 43 template <typename NPObjectType> | |
| 44 static bool Invoke(NPObject* object, | |
| 45 NPIdentifier name, | |
| 46 const NPVariant* args, | |
| 47 uint32_t num_args, | |
| 48 NPVariant* result) { | |
| 49 return static_cast<NPObjectType*>(object)->Invoke( | |
| 50 name, args, num_args, result); | |
| 51 } | |
| 52 | |
| 53 template <typename NPObjectType> | |
| 54 static bool InvokeDefault(NPObject* object, | |
| 55 const NPVariant* args, | |
| 56 uint32_t num_args, | |
| 57 NPVariant* result) { | |
| 58 return static_cast<NPObjectType*>(object)->InvokeDefault( | |
| 59 args, num_args, result); | |
| 60 } | |
| 61 | |
| 62 template <typename NPObjectType> | |
| 63 static bool HasProperty(NPObject* object, NPIdentifier name) { | |
| 64 return static_cast<NPObjectType*>(object)->HasProperty(name); | |
| 65 } | |
| 66 | |
| 67 template <typename NPObjectType> | |
| 68 static bool GetProperty(NPObject* object, | |
| 69 NPIdentifier name, | |
| 70 NPVariant* result) { | |
| 71 return static_cast<NPObjectType*>(object)->GetProperty(name, result); | |
| 72 } | |
| 73 | |
| 74 template <typename NPObjectType> | |
| 75 static bool SetProperty(NPObject* object, | |
| 76 NPIdentifier name, | |
| 77 const NPVariant* value) { | |
| 78 return static_cast<NPObjectType*>(object)->SetProperty(name, value); | |
| 79 } | |
| 80 | |
| 81 template <typename NPObjectType> | |
| 82 static bool RemoveProperty(NPObject* object, NPIdentifier name) { | |
| 83 return static_cast<NPObjectType*>(object)->RemoveProperty(name); | |
| 84 } | |
| 85 | |
| 86 template <typename NPObjectType> | |
| 87 static bool Enumerate(NPObject* object, | |
| 88 NPIdentifier** names, | |
| 89 uint32_t* count) { | |
| 90 return static_cast<NPObjectType*>(object)->Enumerate(names, count); | |
| 91 }; | |
| 92 | |
| 93 template <typename NPObjectType> | |
| 94 static bool Construct(NPObject* object, | |
| 95 const NPVariant* args, | |
| 96 uint32_t num_args, | |
| 97 NPVariant* result) { | |
| 98 return static_cast<NPObjectType*>(object)->Construct( | |
| 99 args, num_args, result); | |
| 100 } | |
| 101 } // namespace np_class_impl; | |
| 102 | |
| 103 template <typename NPObjectType> | |
| 104 const NPClass* NPGetClass() { | |
| 105 static const NPClass np_class = { | |
| 106 NP_CLASS_STRUCT_VERSION, | |
| 107 np_class_impl::Allocate<NPObjectType>, | |
| 108 np_class_impl::Deallocate<NPObjectType>, | |
| 109 np_class_impl::Invalidate<NPObjectType>, | |
| 110 np_class_impl::HasMethod<NPObjectType>, | |
| 111 np_class_impl::Invoke<NPObjectType>, | |
| 112 np_class_impl::InvokeDefault<NPObjectType>, | |
| 113 np_class_impl::HasProperty<NPObjectType>, | |
| 114 np_class_impl::GetProperty<NPObjectType>, | |
| 115 np_class_impl::SetProperty<NPObjectType>, | |
| 116 np_class_impl::RemoveProperty<NPObjectType>, | |
| 117 np_class_impl::Enumerate<NPObjectType>, | |
| 118 np_class_impl::Construct<NPObjectType>, | |
| 119 }; | |
| 120 return &np_class; | |
| 121 }; | |
| 122 | |
| 123 } // namespace np_utils | |
| 124 | |
| 125 #endif // GPU_NP_UTILS_NP_CLASS_H_ | |
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