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Side by Side Diff: gin/dictionary.h

Issue 101583004: [gin] Turn gin into a component (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: win Created 7 years ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef GIN_DICTIONARY_H_ 5 #ifndef GIN_DICTIONARY_H_
6 #define GIN_DICTIONARY_H_ 6 #define GIN_DICTIONARY_H_
7 7
8 #include "gin/converter.h" 8 #include "gin/converter.h"
9 #include "gin/gin_export.h"
9 10
10 namespace gin { 11 namespace gin {
11 12
12 // Dictionary is useful when writing bindings for a function that either 13 // Dictionary is useful when writing bindings for a function that either
13 // receives an arbitrary JavaScript object as an argument or returns an 14 // receives an arbitrary JavaScript object as an argument or returns an
14 // arbitrary JavaScript object as a result. For example, Dictionary is useful 15 // arbitrary JavaScript object as a result. For example, Dictionary is useful
15 // when you might use the |dictionary| type in WebIDL: 16 // when you might use the |dictionary| type in WebIDL:
16 // 17 //
17 // http://heycam.github.io/webidl/#idl-dictionaries 18 // http://heycam.github.io/webidl/#idl-dictionaries
18 // 19 //
19 // WARNING: You cannot retain a Dictionary object in the heap. The underlying 20 // WARNING: You cannot retain a Dictionary object in the heap. The underlying
20 // storage for Dictionary is tied to the closest enclosing 21 // storage for Dictionary is tied to the closest enclosing
21 // v8::HandleScope. Generally speaking, you should store a Dictionary 22 // v8::HandleScope. Generally speaking, you should store a Dictionary
22 // on the stack. 23 // on the stack.
23 // 24 //
24 class Dictionary { 25 class GIN_EXPORT Dictionary {
25 public: 26 public:
26 explicit Dictionary(v8::Isolate* isolate); 27 explicit Dictionary(v8::Isolate* isolate);
27 Dictionary(v8::Isolate* isolate, v8::Handle<v8::Object> object); 28 Dictionary(v8::Isolate* isolate, v8::Handle<v8::Object> object);
28 ~Dictionary(); 29 ~Dictionary();
29 30
30 static Dictionary CreateEmpty(v8::Isolate* isolate); 31 static Dictionary CreateEmpty(v8::Isolate* isolate);
31 32
32 template<typename T> 33 template<typename T>
33 bool Get(const std::string& key, T* out) { 34 bool Get(const std::string& key, T* out) {
34 v8::Handle<v8::Value> val = object_->Get(StringToV8(isolate_, key)); 35 v8::Handle<v8::Value> val = object_->Get(StringToV8(isolate_, key));
35 return ConvertFromV8(isolate_, val, out); 36 return ConvertFromV8(isolate_, val, out);
36 } 37 }
37 38
38 template<typename T> 39 template<typename T>
39 bool Set(const std::string& key, T val) { 40 bool Set(const std::string& key, T val) {
40 return object_->Set(StringToV8(isolate_, key), ConvertToV8(isolate_, val)); 41 return object_->Set(StringToV8(isolate_, key), ConvertToV8(isolate_, val));
41 } 42 }
42 43
43 v8::Isolate* isolate() const { return isolate_; } 44 v8::Isolate* isolate() const { return isolate_; }
44 45
45 private: 46 private:
46 friend struct Converter<Dictionary>; 47 friend struct Converter<Dictionary>;
47 48
48 // TODO(aa): Remove this. Instead, get via FromV8(), Set(), and Get(). 49 // TODO(aa): Remove this. Instead, get via FromV8(), Set(), and Get().
49 v8::Isolate* isolate_; 50 v8::Isolate* isolate_;
50 v8::Handle<v8::Object> object_; 51 v8::Handle<v8::Object> object_;
51 }; 52 };
52 53
53 template<> 54 template<>
54 struct Converter<Dictionary> { 55 struct GIN_EXPORT Converter<Dictionary> {
55 static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate, 56 static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
56 Dictionary val); 57 Dictionary val);
57 static bool FromV8(v8::Isolate* isolate, 58 static bool FromV8(v8::Isolate* isolate,
58 v8::Handle<v8::Value> val, 59 v8::Handle<v8::Value> val,
59 Dictionary* out); 60 Dictionary* out);
60 }; 61 };
61 62
62 } // namespace gin 63 } // namespace gin
63 64
64 #endif // GIN_DICTIONARY_H_ 65 #endif // GIN_DICTIONARY_H_
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