| /* |
| * Copyright (C) 2008, 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_VALUE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_VALUE_H_ |
| |
| #include "base/memory/scoped_refptr.h" |
| #include "third_party/blink/renderer/bindings/core/v8/native_value_traits.h" |
| #include "third_party/blink/renderer/bindings/core/v8/world_safe_v8_reference.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/bindings/script_state.h" |
| #include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" |
| #include "v8/include/v8.h" |
| |
| namespace blink { |
| |
| class CORE_EXPORT ScriptValue final { |
| DISALLOW_NEW(); |
| |
| public: |
| // Defined in ToV8.h due to circular dependency |
| template <typename T> |
| static ScriptValue From(ScriptState*, T&& value); |
| |
| template <typename T, typename... Arguments> |
| static inline T To(v8::Isolate* isolate, |
| v8::Local<v8::Value> value, |
| ExceptionState& exception_state, |
| Arguments const&... arguments) { |
| return NativeValueTraits<T>::NativeValue(isolate, value, exception_state, |
| arguments...); |
| } |
| |
| template <typename T, typename... Arguments> |
| static inline T To(v8::Isolate* isolate, |
| const ScriptValue& value, |
| ExceptionState& exception_state, |
| Arguments const&... arguments) { |
| return To<T>(isolate, value.V8Value(), exception_state, arguments...); |
| } |
| |
| ScriptValue() = default; |
| |
| ScriptValue(v8::Isolate* isolate, v8::Local<v8::Value> value) |
| : isolate_(isolate), value_(isolate, value) { |
| DCHECK(isolate_); |
| } |
| |
| template <typename T> |
| ScriptValue(v8::Isolate* isolate, v8::MaybeLocal<T> value) |
| : isolate_(isolate), |
| value_(isolate, |
| value.IsEmpty() ? v8::Local<T>() : value.ToLocalChecked()) { |
| DCHECK(isolate_); |
| } |
| |
| ScriptValue(const ScriptValue& value) = default; |
| |
| // TODO(riakf): Use this GetIsolate() only when doing DCHECK inside |
| // ScriptValue. |
| v8::Isolate* GetIsolate() const { |
| DCHECK(isolate_); |
| return isolate_; |
| } |
| |
| ScriptValue& operator=(const ScriptValue& value) = default; |
| |
| bool operator==(const ScriptValue& value) const { |
| if (IsEmpty()) |
| return value.IsEmpty(); |
| if (value.IsEmpty()) |
| return false; |
| return value_ == value.value_; |
| } |
| |
| bool operator!=(const ScriptValue& value) const { return !operator==(value); } |
| |
| // This creates a new local Handle; Don't use this in performance-sensitive |
| // places. |
| bool IsFunction() const { |
| DCHECK(!IsEmpty()); |
| v8::Local<v8::Value> value = V8Value(); |
| return !value.IsEmpty() && value->IsFunction(); |
| } |
| |
| // This creates a new local Handle; Don't use this in performance-sensitive |
| // places. |
| bool IsNull() const { |
| DCHECK(!IsEmpty()); |
| v8::Local<v8::Value> value = V8Value(); |
| return !value.IsEmpty() && value->IsNull(); |
| } |
| |
| // This creates a new local Handle; Don't use this in performance-sensitive |
| // places. |
| bool IsUndefined() const { |
| DCHECK(!IsEmpty()); |
| v8::Local<v8::Value> value = V8Value(); |
| return !value.IsEmpty() && value->IsUndefined(); |
| } |
| |
| // This creates a new local Handle; Don't use this in performance-sensitive |
| // places. |
| bool IsObject() const { |
| DCHECK(!IsEmpty()); |
| v8::Local<v8::Value> value = V8Value(); |
| return !value.IsEmpty() && value->IsObject(); |
| } |
| |
| bool IsEmpty() const { return value_.IsEmpty(); } |
| |
| void Clear() { |
| isolate_ = nullptr; |
| value_.Reset(); |
| } |
| |
| v8::Local<v8::Value> V8Value() const; |
| // Returns v8Value() if a given ScriptState is the same as the |
| // ScriptState which is associated with this ScriptValue. Otherwise |
| // this "clones" the v8 value and returns it. |
| v8::Local<v8::Value> V8ValueFor(ScriptState*) const; |
| |
| bool ToString(String&) const; |
| |
| static ScriptValue CreateNull(v8::Isolate*); |
| |
| void Trace(Visitor* visitor) const { visitor->Trace(value_); } |
| |
| private: |
| v8::Isolate* isolate_ = nullptr; |
| WorldSafeV8Reference<v8::Value> value_; |
| }; |
| |
| template <> |
| struct NativeValueTraits<ScriptValue> |
| : public NativeValueTraitsBase<ScriptValue> { |
| static inline ScriptValue NativeValue(v8::Isolate* isolate, |
| v8::Local<v8::Value> value, |
| ExceptionState& exception_state) { |
| return ScriptValue(isolate, value); |
| } |
| }; |
| |
| } // namespace blink |
| |
| namespace WTF { |
| |
| template <> |
| struct VectorTraits<blink::ScriptValue> : VectorTraitsBase<blink::ScriptValue> { |
| STATIC_ONLY(VectorTraits); |
| static constexpr bool kCanClearUnusedSlotsWithMemset = true; |
| }; |
| |
| } // namespace WTF |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_VALUE_H_ |