chrome/browser/renderer_host/chrome_render_view_host_observer.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/renderer_host/chrome_render_view_host_observer.h"
   6
   7 #include "base/command_line.h"
   8 #include "chrome/browser/extensions/extension_service.h"
   9 #include "chrome/browser/extensions/extension_system.h"
  10 #include "chrome/browser/net/predictor.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/common/chrome_notification_types.h"
  13 #include "chrome/common/chrome_switches.h"
  14 #include "chrome/common/extensions/extension.h"
  15 #include "chrome/common/extensions/extension_messages.h"
  16 #include "chrome/common/extensions/manifest.h"
  17 #include "chrome/common/render_messages.h"
  18 #include "chrome/common/url_constants.h"
  19 #include "content/public/browser/child_process_security_policy.h"
  20 #include "content/public/browser/notification_service.h"
  21 #include "content/public/browser/render_process_host.h"
  22 #include "content/public/browser/render_view_host.h"
  23 #include "content/public/browser/site_instance.h"
  24 #include "extensions/common/constants.h"
  25
  26 #if defined(OS_WIN)
  27 #include "base/win/win_util.h"
  28 #endif  // OS_WIN
  29
  30 using content::ChildProcessSecurityPolicy;
  31 using content::RenderViewHost;
  32 using content::SiteInstance;
  33 using extensions::Extension;
  34 using extensions::Manifest;
  35
  36 ChromeRenderViewHostObserver::ChromeRenderViewHostObserver(
  37     RenderViewHost* render_view_host, chrome_browser_net::Predictor* predictor)
  38     : content::RenderViewHostObserver(render_view_host),
  39       predictor_(predictor) {
  40   SiteInstance* site_instance = render_view_host->GetSiteInstance();
  41   profile_ = Profile::FromBrowserContext(
  42       site_instance->GetBrowserContext());
  43
  44   InitRenderViewForExtensions();
  45 }
  46
  47 ChromeRenderViewHostObserver::~ChromeRenderViewHostObserver() {
  48   if (render_view_host())
  49     RemoveRenderViewHostForExtensions(render_view_host());
  50 }
  51
  52 void ChromeRenderViewHostObserver::RenderViewHostInitialized() {
  53   // This reinitializes some state in the case where a render process crashes
  54   // but we keep the same RenderViewHost instance.
  55   InitRenderViewForExtensions();
  56 }
  57
  58 void ChromeRenderViewHostObserver::RenderViewHostDestroyed(
  59     RenderViewHost* rvh) {
  60   RemoveRenderViewHostForExtensions(rvh);
  61   delete this;
  62 }
  63
  64 void ChromeRenderViewHostObserver::Navigate(const GURL& url) {
  65   if (!predictor_)
  66     return;
  67   if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kChromeFrame) &&
  68      (url.SchemeIs(chrome::kHttpScheme) || url.SchemeIs(chrome::kHttpsScheme)))
  69     predictor_->PreconnectUrlAndSubresources(url);
  70 }
  71
  72 bool ChromeRenderViewHostObserver::OnMessageReceived(
  73     const IPC::Message& message) {
  74   bool handled = true;
  75   IPC_BEGIN_MESSAGE_MAP(ChromeRenderViewHostObserver, message)
  76     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_FocusedNodeTouched,
  77                         OnFocusedNodeTouched)
  78     IPC_MESSAGE_UNHANDLED(handled = false)
  79   IPC_END_MESSAGE_MAP()
  80   return handled;
  81 }
  82
  83 void ChromeRenderViewHostObserver::InitRenderViewForExtensions() {
  84   const Extension* extension = GetExtension();
  85   if (!extension)
  86     return;
  87
  88   content::RenderProcessHost* process = render_view_host()->GetProcess();
  89
  90   // Some extensions use chrome:// URLs.
  91   // This is a temporary solution. Replace it with access to chrome-static://
  92   // once it is implemented. See: crbug.com/226927.
  93   Manifest::Type type = extension->GetType();
  94   if (type == Manifest::TYPE_EXTENSION ||
  95       type == Manifest::TYPE_LEGACY_PACKAGED_APP ||
  96       (type == Manifest::TYPE_PLATFORM_APP &&
  97        extension->location() == Manifest::COMPONENT)) {
  98     ChildProcessSecurityPolicy::GetInstance()->GrantScheme(
  99         process->GetID(), chrome::kChromeUIScheme);
 100   }
 101
 102   // Some extensions use file:// URLs.
 103   if (type == Manifest::TYPE_EXTENSION ||
 104       type == Manifest::TYPE_LEGACY_PACKAGED_APP) {
 105     if (extensions::ExtensionSystem::Get(profile_)->extension_service()->
 106             extension_prefs()->AllowFileAccess(extension->id())) {
 107       ChildProcessSecurityPolicy::GetInstance()->GrantScheme(
 108           process->GetID(), chrome::kFileScheme);
 109     }
 110   }
 111
 112   switch (type) {
 113     case Manifest::TYPE_EXTENSION:
 114     case Manifest::TYPE_USER_SCRIPT:
 115     case Manifest::TYPE_HOSTED_APP:
 116     case Manifest::TYPE_LEGACY_PACKAGED_APP:
 117     case Manifest::TYPE_PLATFORM_APP:
 118       // Always send a Loaded message before ActivateExtension so that
 119       // ExtensionDispatcher knows what Extension is active, not just its ID.
 120       // This is important for classifying the Extension's JavaScript context
 121       // correctly (see ExtensionDispatcher::ClassifyJavaScriptContext).
 122       Send(new ExtensionMsg_Loaded(
 123           std::vector<ExtensionMsg_Loaded_Params>(
 124               1, ExtensionMsg_Loaded_Params(extension))));
 125       Send(new ExtensionMsg_ActivateExtension(extension->id()));
 126       break;
 127
 128     case Manifest::TYPE_UNKNOWN:
 129     case Manifest::TYPE_THEME:
 130       break;
 131   }
 132 }
 133
 134 const Extension* ChromeRenderViewHostObserver::GetExtension() {
 135   // Note that due to ChromeContentBrowserClient::GetEffectiveURL(), hosted apps
 136   // (excluding bookmark apps) will have a chrome-extension:// URL for their
 137   // site, so we can ignore that wrinkle here.
 138   SiteInstance* site_instance = render_view_host()->GetSiteInstance();
 139   const GURL& site = site_instance->GetSiteURL();
 140
 141   if (!site.SchemeIs(extensions::kExtensionScheme))
 142     return NULL;
 143
 144   ExtensionService* service =
 145       extensions::ExtensionSystem::Get(profile_)->extension_service();
 146   if (!service)
 147     return NULL;
 148
 149   // Reload the extension if it has crashed.
 150   // TODO(yoz): This reload doesn't happen synchronously for unpacked
 151   //            extensions. It seems to be fast enough, but there is a race.
 152   //            We should delay loading until the extension has reloaded.
 153   if (service->GetTerminatedExtension(site.host()))
 154     service->ReloadExtension(site.host());
 155
 156   // May be null if the extension doesn't exist, for example if somebody typos
 157   // a chrome-extension:// URL.
 158   return service->extensions()->GetByID(site.host());
 159 }
 160
 161 void ChromeRenderViewHostObserver::RemoveRenderViewHostForExtensions(
 162     RenderViewHost* rvh) {
 163   ExtensionProcessManager* process_manager =
 164       extensions::ExtensionSystem::Get(profile_)->process_manager();
 165   if (process_manager)
 166     process_manager->UnregisterRenderViewHost(rvh);
 167 }
 168
 169 void ChromeRenderViewHostObserver::OnFocusedNodeTouched(bool editable) {
 170   if (editable) {
 171 #if defined(OS_WIN)
 172     base::win::DisplayVirtualKeyboard();
 173 #endif
 174     content::NotificationService::current()->Notify(
 175         chrome::NOTIFICATION_FOCUSED_NODE_TOUCHED,
 176         content::Source<RenderViewHost>(render_view_host()),
 177         content::Details<bool>(&editable));
 178   } else {
 179 #if defined(OS_WIN)
 180     base::win::DismissVirtualKeyboard();
 181 #endif
 182   }
 183 }