ppapi/proxy/ppb_flash_message_loop_proxy.cc

   1 // Copyright (c) 2012 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 "ppapi/proxy/ppb_flash_message_loop_proxy.h"
   6
   7 #include "base/bind.h"
   8 #include "ppapi/c/pp_errors.h"
   9 #include "ppapi/c/private/ppb_flash_message_loop.h"
  10 #include "ppapi/proxy/enter_proxy.h"
  11 #include "ppapi/proxy/plugin_dispatcher.h"
  12 #include "ppapi/proxy/ppapi_messages.h"
  13 #include "ppapi/shared_impl/resource.h"
  14 #include "ppapi/thunk/enter.h"
  15 #include "ppapi/thunk/ppb_flash_message_loop_api.h"
  16 #include "ppapi/thunk/resource_creation_api.h"
  17
  18 using ppapi::thunk::PPB_Flash_MessageLoop_API;
  19
  20 namespace ppapi {
  21 namespace proxy {
  22 namespace {
  23
  24 class FlashMessageLoop : public PPB_Flash_MessageLoop_API, public Resource {
  25  public:
  26   explicit FlashMessageLoop(const HostResource& resource);
  27   ~FlashMessageLoop() override;
  28
  29   // Resource overrides.
  30   PPB_Flash_MessageLoop_API* AsPPB_Flash_MessageLoop_API() override;
  31
  32   // PPB_Flash_MesssageLoop_API implementation.
  33   int32_t Run() override;
  34   void Quit() override;
  35   void RunFromHostProxy(const RunFromHostProxyCallback& callback) override;
  36
  37  private:
  38   DISALLOW_COPY_AND_ASSIGN(FlashMessageLoop);
  39 };
  40
  41 FlashMessageLoop::FlashMessageLoop(const HostResource& resource)
  42     : Resource(OBJECT_IS_PROXY, resource) {
  43 }
  44
  45 FlashMessageLoop::~FlashMessageLoop() {
  46 }
  47
  48 PPB_Flash_MessageLoop_API* FlashMessageLoop::AsPPB_Flash_MessageLoop_API() {
  49   return this;
  50 }
  51
  52 int32_t FlashMessageLoop::Run() {
  53   int32_t result = PP_ERROR_FAILED;
  54   IPC::SyncMessage* msg = new PpapiHostMsg_PPBFlashMessageLoop_Run(
  55       API_ID_PPB_FLASH_MESSAGELOOP, host_resource(), &result);
  56   msg->EnableMessagePumping();
  57   PluginDispatcher::GetForResource(this)->Send(msg);
  58   return result;
  59 }
  60
  61 void FlashMessageLoop::Quit() {
  62   PluginDispatcher::GetForResource(this)->Send(
  63       new PpapiHostMsg_PPBFlashMessageLoop_Quit(
  64           API_ID_PPB_FLASH_MESSAGELOOP, host_resource()));
  65 }
  66
  67 void FlashMessageLoop::RunFromHostProxy(
  68     const RunFromHostProxyCallback& callback) {
  69   // This should never be called on the plugin side.
  70   NOTREACHED();
  71 }
  72
  73 }  // namespace
  74
  75 PPB_Flash_MessageLoop_Proxy::PPB_Flash_MessageLoop_Proxy(Dispatcher* dispatcher)
  76     : InterfaceProxy(dispatcher) {
  77 }
  78
  79 PPB_Flash_MessageLoop_Proxy::~PPB_Flash_MessageLoop_Proxy() {
  80 }
  81
  82 // static
  83 PP_Resource PPB_Flash_MessageLoop_Proxy::CreateProxyResource(
  84     PP_Instance instance) {
  85   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
  86   if (!dispatcher)
  87     return 0;
  88
  89   HostResource result;
  90   dispatcher->Send(new PpapiHostMsg_PPBFlashMessageLoop_Create(
  91       API_ID_PPB_FLASH_MESSAGELOOP, instance, &result));
  92   if (result.is_null())
  93     return 0;
  94   return (new FlashMessageLoop(result))->GetReference();
  95 }
  96
  97 bool PPB_Flash_MessageLoop_Proxy::OnMessageReceived(const IPC::Message& msg) {
  98   if (!dispatcher()->permissions().HasPermission(PERMISSION_FLASH))
  99     return false;
 100
 101   bool handled = true;
 102   IPC_BEGIN_MESSAGE_MAP(PPB_Flash_MessageLoop_Proxy, msg)
 103     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFlashMessageLoop_Create,
 104                         OnMsgCreate)
 105     // We cannot use IPC_MESSAGE_HANDLER here. Because it tries to send the sync
 106     // message reply after the handler returns. However, in this case, the
 107     // PPB_Flash_MessageLoop_Proxy object may be destroyed before the handler
 108     // returns.
 109     IPC_MESSAGE_HANDLER_DELAY_REPLY(PpapiHostMsg_PPBFlashMessageLoop_Run,
 110                                     OnMsgRun)
 111     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFlashMessageLoop_Quit,
 112                         OnMsgQuit)
 113     IPC_MESSAGE_UNHANDLED(handled = false)
 114   IPC_END_MESSAGE_MAP()
 115   return handled;
 116 }
 117
 118 void PPB_Flash_MessageLoop_Proxy::OnMsgCreate(PP_Instance instance,
 119                                               HostResource* result) {
 120   if (!dispatcher()->permissions().HasPermission(PERMISSION_FLASH))
 121     return;
 122   thunk::EnterResourceCreation enter(instance);
 123   if (enter.succeeded()) {
 124     result->SetHostResource(
 125         instance, enter.functions()->CreateFlashMessageLoop(instance));
 126   }
 127 }
 128
 129 void PPB_Flash_MessageLoop_Proxy::OnMsgRun(
 130     const HostResource& flash_message_loop,
 131     IPC::Message* reply) {
 132   if (!dispatcher()->permissions().HasPermission(PERMISSION_FLASH))
 133     return;
 134
 135   PPB_Flash_MessageLoop_API::RunFromHostProxyCallback callback =
 136       base::Bind(&PPB_Flash_MessageLoop_Proxy::WillQuitSoon, AsWeakPtr(),
 137                  base::Passed(scoped_ptr<IPC::Message>(reply)));
 138
 139   EnterHostFromHostResource<PPB_Flash_MessageLoop_API>
 140       enter(flash_message_loop);
 141   if (enter.succeeded())
 142     enter.object()->RunFromHostProxy(callback);
 143   else
 144     callback.Run(PP_ERROR_BADRESOURCE);
 145 }
 146
 147 void PPB_Flash_MessageLoop_Proxy::OnMsgQuit(
 148     const ppapi::HostResource& flash_message_loop) {
 149   EnterHostFromHostResource<PPB_Flash_MessageLoop_API>
 150       enter(flash_message_loop);
 151   if (enter.succeeded())
 152     enter.object()->Quit();
 153 }
 154
 155 void PPB_Flash_MessageLoop_Proxy::WillQuitSoon(
 156     scoped_ptr<IPC::Message> reply_message,
 157     int32_t result) {
 158   PpapiHostMsg_PPBFlashMessageLoop_Run::WriteReplyParams(reply_message.get(),
 159                                                          result);
 160   Send(reply_message.release());
 161 }
 162
 163 }  // namespace proxy
 164 }  // namespace ppapi