1 // Copyright 2014 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 EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_ 6 #define EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_ 7 8 #include <map> 9 #include <string> 10 #include <vector> 11 12 #include "base/basictypes.h" 13 #include "base/memory/scoped_ptr.h" 14 #include "gin/public/context_holder.h" 15 #include "v8/include/v8-util.h" 16 #include "v8/include/v8.h" 17 18 namespace extensions { 19 class NativeHandler; 20 21 // A registry for the v8::Value representations of extension API schemas. 22 // In a way, the v8 counterpart to ExtensionAPI. 23 class V8SchemaRegistry { 24 public: 25 V8SchemaRegistry(); 26 ~V8SchemaRegistry(); 27 28 // Creates a NativeHandler wrapper |this|. Supports GetSchema. 29 scoped_ptr<NativeHandler> AsNativeHandler(); 30 31 // Returns a v8::Array with all the schemas for the APIs in |apis|. 32 v8::Handle<v8::Array> GetSchemas(const std::vector<std::string>& apis); 33 34 // Returns a v8::Object for the schema for |api|, possibly from the cache. 35 v8::Handle<v8::Object> GetSchema(const std::string& api); 36 37 private: 38 // Gets the separate context that backs the registry, creating a new one if 39 // if necessary. Will also initialize schema_cache_. 40 v8::Handle<v8::Context> GetOrCreateContext(v8::Isolate* isolate); 41 42 // Cache of schemas. Created lazily by GetOrCreateContext. 43 typedef v8::StdPersistentValueMap<std::string, v8::Object> SchemaCache; 44 scoped_ptr<SchemaCache> schema_cache_; 45 46 // Single per-instance gin::ContextHolder to create v8::Values. 47 // Created lazily via GetOrCreateContext. 48 scoped_ptr<gin::ContextHolder> context_holder_; 49 50 DISALLOW_COPY_AND_ASSIGN(V8SchemaRegistry); 51 }; 52 53 } // namespace extensions 54 55 #endif // EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_ 56
