1 // Copyright (c) 2013 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.
5 #ifndef CONTENT_RENDERER_PEPPER_V8_VAR_CONVERTER_H
6 #define CONTENT_RENDERER_PEPPER_V8_VAR_CONVERTER_H
8 #include "base/basictypes.h"
9 #include "base/callback.h"
10 #include "base/compiler_specific.h"
11 #include "base/message_loop/message_loop_proxy.h"
12 #include "ppapi/c/pp_instance.h"
13 #include "ppapi/c/pp_var.h"
14 #include "ppapi/shared_impl/scoped_pp_var.h"
15 #include "v8/include/v8.h"
16 #include "content/common/content_export.h"
20 class ResourceConverter;
22 class CONTENT_EXPORT V8VarConverter {
24 explicit V8VarConverter(PP_Instance instance);
25 // Constructor for testing.
26 V8VarConverter(PP_Instance instance,
27 scoped_ptr<ResourceConverter> resource_converter);
30 // Converts the given PP_Var to a v8::Value. True is returned upon success.
31 bool ToV8Value(const PP_Var& var,
32 v8::Handle<v8::Context> context,
33 v8::Handle<v8::Value>* result);
37 VarResult() : completed_synchronously(false), success(false) {}
39 // True if the conversion completed synchronously and the callback will not
41 bool completed_synchronously;
43 // True if the conversion was successful. Only valid if
44 // |completed_synchronously| is true.
47 // The result if the conversion was successful. Only valid if
48 // |completed_synchronously| and |success| are true.
49 ppapi::ScopedPPVar var;
52 // Converts the given v8::Value to a PP_Var. Every PP_Var in the reference
53 // graph in the result will have a refcount equal to the number of references
54 // to it in the graph. The root of the result will have one additional
55 // reference. The callback is run when conversion is complete with the
56 // resulting var and a bool indicating success or failure. Conversion may be
57 // asynchronous because converting some resources may result in communication
58 // across IPC. |context| is guaranteed to only be used synchronously. If
59 // the conversion can occur synchronously, |callback| will not be run,
60 // otherwise it will be run.
61 VarResult FromV8Value(
62 v8::Handle<v8::Value> val,
63 v8::Handle<v8::Context> context,
64 const base::Callback<void(const ppapi::ScopedPPVar&, bool)>& callback);
65 bool FromV8ValueSync(v8::Handle<v8::Value> val,
66 v8::Handle<v8::Context> context,
67 ppapi::ScopedPPVar* result_var);
69 // Returns true on success, false on failure.
70 bool FromV8ValueInternal(v8::Handle<v8::Value> val,
71 v8::Handle<v8::Context> context,
72 ppapi::ScopedPPVar* result_var);
74 // The message loop to run the callback to |FromV8Value| from.
75 scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
77 // The converter to use for converting V8 vars to resources.
78 scoped_ptr<ResourceConverter> resource_converter_;
80 DISALLOW_COPY_AND_ASSIGN(V8VarConverter);
83 } // namespace content
85 #endif // CONTENT_RENDERER_PEPPER_V8_VAR_CONVERTER_H