chrome/renderer/extensions/pepper_request_proxy.h

   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
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_RENDERER_EXTENSIONS_PEPPER_REQUEST_PROXY_H_
   6 #define CHROME_RENDERER_EXTENSIONS_PEPPER_REQUEST_PROXY_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/callback.h"
  12
  13 namespace base {
  14 class ListValue;
  15 }
  16
  17 namespace v8 {
  18 class Isolate;
  19 }
  20
  21 namespace extensions {
  22
  23 class ChromeV8Context;
  24
  25 // A proxy that forwards pepper apps API calls through the Javascript API
  26 // bindings.
  27 class PepperRequestProxy {
  28  public:
  29   // A callback to be called with the result of an API call. If |success| is
  30   // true, |response| will contain the response value. Otherwise, |error| will
  31   // contain the error message.
  32   typedef base::Callback<void(bool success,
  33                               const base::ListValue& response,
  34                               const std::string& error)> ResponseCallback;
  35
  36   explicit PepperRequestProxy(ChromeV8Context* context);
  37   ~PepperRequestProxy();
  38
  39   // Starts an API request. Returns whether the call was successful. On failure,
  40   // |error| will contain the error message. |callback| will only be called on
  41   // success.
  42   bool StartRequest(const ResponseCallback& callback,
  43                     const std::string& request_name,
  44                     const base::ListValue& args,
  45                     std::string* error);
  46
  47   void OnResponseReceived(int request_id,
  48                           bool success,
  49                           const base::ListValue& args,
  50                           const std::string& error);
  51
  52  private:
  53   typedef std::map<int, ResponseCallback> PendingRequestMap;
  54
  55   // Non-owning pointer.
  56   ChromeV8Context* context_;
  57   // Non-owning pointer.
  58   v8::Isolate* isolate_;
  59   PendingRequestMap pending_request_map_;
  60   int next_request_id_;
  61 };
  62
  63 }  // namespace extensions
  64
  65 #endif  // CHROME_RENDERER_EXTENSIONS_PEPPER_REQUEST_PROXY_H_