src/chrome/browser/extensions/api/messaging/extension_message_port.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 "chrome/browser/extensions/api/messaging/extension_message_port.h"
   6
   7 #include "chrome/browser/profiles/profile.h"
   8 #include "content/public/browser/render_process_host.h"
   9 #include "extensions/browser/extension_host.h"
  10 #include "extensions/browser/process_manager.h"
  11 #include "extensions/common/extension_messages.h"
  12 #include "extensions/common/manifest_handlers/background_info.h"
  13
  14 namespace extensions {
  15
  16 ExtensionMessagePort::ExtensionMessagePort(content::RenderProcessHost* process,
  17                                            int routing_id,
  18                                            const std::string& extension_id)
  19      : process_(process),
  20        routing_id_(routing_id),
  21        extension_id_(extension_id),
  22        background_host_ptr_(NULL) {
  23 }
  24
  25 void ExtensionMessagePort::DispatchOnConnect(
  26     int dest_port_id,
  27     const std::string& channel_name,
  28     const base::DictionaryValue& source_tab,
  29     const std::string& source_extension_id,
  30     const std::string& target_extension_id,
  31     const GURL& source_url,
  32     const std::string& tls_channel_id) {
  33   ExtensionMsg_ExternalConnectionInfo info;
  34   info.target_id = target_extension_id;
  35   info.source_id = source_extension_id;
  36   info.source_url = source_url;
  37   process_->Send(new ExtensionMsg_DispatchOnConnect(
  38       routing_id_, dest_port_id, channel_name, source_tab, info,
  39       tls_channel_id));
  40 }
  41
  42 void ExtensionMessagePort::DispatchOnDisconnect(
  43     int source_port_id,
  44     const std::string& error_message) {
  45   process_->Send(new ExtensionMsg_DispatchOnDisconnect(
  46       routing_id_, source_port_id, error_message));
  47 }
  48
  49 void ExtensionMessagePort::DispatchOnMessage(const Message& message,
  50                                              int target_port_id) {
  51   process_->Send(new ExtensionMsg_DeliverMessage(
  52       routing_id_, target_port_id, message));
  53 }
  54
  55 void ExtensionMessagePort::IncrementLazyKeepaliveCount() {
  56   Profile* profile =
  57       Profile::FromBrowserContext(process_->GetBrowserContext());
  58   extensions::ProcessManager* pm = ProcessManager::Get(profile);
  59   ExtensionHost* host = pm->GetBackgroundHostForExtension(extension_id_);
  60   if (host && BackgroundInfo::HasLazyBackgroundPage(host->extension()))
  61     pm->IncrementLazyKeepaliveCount(host->extension());
  62
  63   // Keep track of the background host, so when we decrement, we only do so if
  64   // the host hasn't reloaded.
  65   background_host_ptr_ = host;
  66 }
  67
  68 void ExtensionMessagePort::DecrementLazyKeepaliveCount() {
  69   Profile* profile =
  70       Profile::FromBrowserContext(process_->GetBrowserContext());
  71   extensions::ProcessManager* pm = ProcessManager::Get(profile);
  72   ExtensionHost* host = pm->GetBackgroundHostForExtension(extension_id_);
  73   if (host && host == background_host_ptr_)
  74     pm->DecrementLazyKeepaliveCount(host->extension());
  75 }
  76
  77 content::RenderProcessHost* ExtensionMessagePort::GetRenderProcessHost() {
  78   return process_;
  79 }
  80
  81 }  // namespace extensions