ppapi/tests/extensions/background_keepalive/background.cc

   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.
   4
   5 #include <cstdio>
   6 #include <string>
   7
   8 #include "ppapi/cpp/instance.h"
   9 #include "ppapi/cpp/message_loop.h"
  10 #include "ppapi/cpp/module.h"
  11 #include "ppapi/cpp/var.h"
  12 #include "ppapi/utility/completion_callback_factory.h"
  13
  14 class Instance : public pp::Instance {
  15  public:
  16   explicit Instance(PP_Instance instance) :
  17       pp::Instance(instance),
  18       callback_factory_(this),
  19       delay_milliseconds_(10),
  20       active_(true) {
  21     DoSomething(PP_OK);
  22   }
  23   virtual ~Instance() {}
  24
  25   virtual void HandleMessage(const pp::Var& message_var) {
  26     std::string message_string = message_var.AsString();
  27     if (message_string == "be idle") {
  28       active_ = false;
  29     } else {
  30       PostMessage("Unhandled control message.");
  31     }
  32   }
  33
  34   void DoSomething(int32_t result) {
  35     if (active_) {
  36       pp::MessageLoop loop = pp::MessageLoop::GetCurrent();
  37       pp::CompletionCallback c = callback_factory_.NewCallback(
  38           &Instance::DoSomething);
  39       loop.PostWork(c, delay_milliseconds_);
  40     }
  41   }
  42
  43   pp::CompletionCallbackFactory<Instance> callback_factory_;
  44   int delay_milliseconds_;
  45   bool active_;
  46 };
  47
  48 class Module : public pp::Module {
  49  public:
  50   Module() : pp::Module() {}
  51   virtual ~Module() {}
  52
  53   virtual pp::Instance* CreateInstance(PP_Instance instance) {
  54     return new Instance(instance);
  55   }
  56 };
  57
  58 namespace pp {
  59 Module* CreateModule() {
  60   return new ::Module();
  61 }
  62 }  // namespace pp
  63