extensions/browser/renderer_startup_helper.cc

   1 // Copyright 2014 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 "extensions/browser/renderer_startup_helper.h"
   6
   7 #include "base/values.h"
   8 #include "components/keyed_service/content/browser_context_dependency_manager.h"
   9 #include "content/public/browser/notification_service.h"
  10 #include "content/public/browser/notification_types.h"
  11 #include "content/public/browser/render_process_host.h"
  12 #include "extensions/browser/extension_function_dispatcher.h"
  13 #include "extensions/browser/extension_registry.h"
  14 #include "extensions/browser/extensions_browser_client.h"
  15 #include "extensions/common/extension_messages.h"
  16 #include "extensions/common/extension_set.h"
  17 #include "extensions/common/extensions_client.h"
  18 #include "ui/base/webui/web_ui_util.h"
  19
  20 using content::BrowserContext;
  21
  22 namespace extensions {
  23
  24 RendererStartupHelper::RendererStartupHelper(BrowserContext* browser_context)
  25     : browser_context_(browser_context) {
  26   DCHECK(browser_context);
  27   registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_CREATED,
  28                  content::NotificationService::AllBrowserContextsAndSources());
  29 }
  30
  31 RendererStartupHelper::~RendererStartupHelper() {}
  32
  33 void RendererStartupHelper::Observe(
  34     int type,
  35     const content::NotificationSource& source,
  36     const content::NotificationDetails& details) {
  37   DCHECK_EQ(content::NOTIFICATION_RENDERER_PROCESS_CREATED, type);
  38   content::RenderProcessHost* process =
  39       content::Source<content::RenderProcessHost>(source).ptr();
  40   if (!ExtensionsBrowserClient::Get()->IsSameContext(
  41           browser_context_, process->GetBrowserContext()))
  42     return;
  43
  44   // Platform apps need to know the system font.
  45   // TODO(dbeam): this is not the system font in all cases.
  46   process->Send(new ExtensionMsg_SetSystemFont(webui::GetFontFamily(),
  47                                                webui::GetFontSize()));
  48
  49   // Valid extension function names, used to setup bindings in renderer.
  50   std::vector<std::string> function_names;
  51   ExtensionFunctionDispatcher::GetAllFunctionNames(&function_names);
  52   process->Send(new ExtensionMsg_SetFunctionNames(function_names));
  53
  54   // Scripting whitelist. This is modified by tests and must be communicated
  55   // to renderers.
  56   process->Send(new ExtensionMsg_SetScriptingWhitelist(
  57       extensions::ExtensionsClient::Get()->GetScriptingWhitelist()));
  58
  59   // Loaded extensions.
  60   std::vector<ExtensionMsg_Loaded_Params> loaded_extensions;
  61   const ExtensionSet& extensions =
  62       ExtensionRegistry::Get(browser_context_)->enabled_extensions();
  63   for (const auto& ext : extensions) {
  64     // Renderers don't need to know about themes.
  65     if (!ext->is_theme()) {
  66       // TODO(kalman): Only include tab specific permissions for extension
  67       // processes, no other process needs it, so it's mildly wasteful.
  68       // I am not sure this is possible to know this here, at such a low
  69       // level of the stack. Perhaps site isolation can help.
  70       bool include_tab_permissions = true;
  71       loaded_extensions.push_back(
  72           ExtensionMsg_Loaded_Params(ext.get(), include_tab_permissions));
  73     }
  74   }
  75   process->Send(new ExtensionMsg_Loaded(loaded_extensions));
  76 }
  77
  78 //////////////////////////////////////////////////////////////////////////////
  79
  80 // static
  81 RendererStartupHelper* RendererStartupHelperFactory::GetForBrowserContext(
  82     BrowserContext* context) {
  83   return static_cast<RendererStartupHelper*>(
  84       GetInstance()->GetServiceForBrowserContext(context, true));
  85 }
  86
  87 // static
  88 RendererStartupHelperFactory* RendererStartupHelperFactory::GetInstance() {
  89   return Singleton<RendererStartupHelperFactory>::get();
  90 }
  91
  92 RendererStartupHelperFactory::RendererStartupHelperFactory()
  93     : BrowserContextKeyedServiceFactory(
  94           "RendererStartupHelper",
  95           BrowserContextDependencyManager::GetInstance()) {
  96   // No dependencies on other services.
  97 }
  98
  99 RendererStartupHelperFactory::~RendererStartupHelperFactory() {}
 100
 101 KeyedService* RendererStartupHelperFactory::BuildServiceInstanceFor(
 102     content::BrowserContext* context) const {
 103   return new RendererStartupHelper(context);
 104 }
 105
 106 BrowserContext* RendererStartupHelperFactory::GetBrowserContextToUse(
 107     BrowserContext* context) const {
 108   // Redirected in incognito.
 109   return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
 110 }
 111
 112 bool RendererStartupHelperFactory::ServiceIsCreatedWithBrowserContext() const {
 113   return true;
 114 }
 115
 116 }  // namespace extensions