| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef GIN_DICTIONARY_H_ |
| #define GIN_DICTIONARY_H_ |
| |
| #include "gin/converter.h" |
| #include "gin/gin_export.h" |
| |
| namespace gin { |
| |
| // Dictionary is useful when writing bindings for a function that either |
| // receives an arbitrary JavaScript object as an argument or returns an |
| // arbitrary JavaScript object as a result. For example, Dictionary is useful |
| // when you might use the |dictionary| type in WebIDL: |
| // |
| // http://heycam.github.io/webidl/#idl-dictionaries |
| // |
| // WARNING: You cannot retain a Dictionary object in the heap. The underlying |
| // storage for Dictionary is tied to the closest enclosing |
| // v8::HandleScope. Generally speaking, you should store a Dictionary |
| // on the stack. |
| // |
| class GIN_EXPORT Dictionary { |
| public: |
| explicit Dictionary(v8::Isolate* isolate); |
| Dictionary(v8::Isolate* isolate, v8::Local<v8::Object> object); |
| Dictionary(const Dictionary& other); |
| ~Dictionary(); |
| |
| static Dictionary CreateEmpty(v8::Isolate* isolate); |
| |
| template<typename T> |
| bool Get(const std::string& key, T* out) { |
| v8::Local<v8::Value> val; |
| if (!object_->Get(isolate_->GetCurrentContext(), StringToV8(isolate_, key)) |
| .ToLocal(&val)) { |
| return false; |
| } |
| return ConvertFromV8(isolate_, val, out); |
| } |
| |
| template <typename T> |
| bool Set(const std::string& key, const T& val) { |
| v8::Local<v8::Value> v8_value; |
| if (!TryConvertToV8(isolate_, val, &v8_value)) |
| return false; |
| v8::Maybe<bool> result = |
| object_->Set(isolate_->GetCurrentContext(), StringToV8(isolate_, key), |
| v8_value); |
| return !result.IsNothing() && result.FromJust(); |
| } |
| |
| v8::Isolate* isolate() const { return isolate_; } |
| |
| private: |
| friend struct Converter<Dictionary>; |
| |
| // TODO(aa): Remove this. Instead, get via FromV8(), Set(), and Get(). |
| v8::Isolate* isolate_; |
| v8::Local<v8::Object> object_; |
| }; |
| |
| template<> |
| struct GIN_EXPORT Converter<Dictionary> { |
| static v8::Local<v8::Value> ToV8(v8::Isolate* isolate, |
| Dictionary val); |
| static bool FromV8(v8::Isolate* isolate, |
| v8::Local<v8::Value> val, |
| Dictionary* out); |
| }; |
| |
| } // namespace gin |
| |
| #endif // GIN_DICTIONARY_H_ |