chrome/browser/extensions/extension_renderer_state.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 "chrome/browser/extensions/extension_renderer_state.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "chrome/browser/chrome_notification_types.h"
  10 #include "chrome/browser/sessions/session_tab_helper.h"
  11 #include "chrome/browser/tab_contents/retargeting_details.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "content/public/browser/navigation_details.h"
  14 #include "content/public/browser/notification_observer.h"
  15 #include "content/public/browser/notification_registrar.h"
  16 #include "content/public/browser/notification_service.h"
  17 #include "content/public/browser/notification_types.h"
  18 #include "content/public/browser/render_process_host.h"
  19 #include "content/public/browser/render_view_host.h"
  20 #include "content/public/browser/resource_request_info.h"
  21 #include "content/public/browser/web_contents.h"
  22 #include "content/public/browser/web_contents_observer.h"
  23 #include "content/public/common/process_type.h"
  24
  25 using content::BrowserThread;
  26 using content::RenderProcessHost;
  27 using content::RenderViewHost;
  28 using content::WebContents;
  29
  30 //
  31 // ExtensionRendererState::RenderViewHostObserver
  32 //
  33
  34 class ExtensionRendererState::RenderViewHostObserver
  35     : public content::WebContentsObserver {
  36  public:
  37   RenderViewHostObserver(RenderViewHost* host, WebContents* web_contents)
  38       : content::WebContentsObserver(web_contents),
  39         render_view_host_(host) {
  40   }
  41
  42   void RenderViewDeleted(content::RenderViewHost* host) override {
  43     if (host != render_view_host_)
  44       return;
  45     BrowserThread::PostTask(
  46         BrowserThread::IO, FROM_HERE,
  47         base::Bind(
  48             &ExtensionRendererState::ClearTabAndWindowId,
  49             base::Unretained(ExtensionRendererState::GetInstance()),
  50             host->GetProcess()->GetID(), host->GetRoutingID()));
  51
  52     delete this;
  53   }
  54
  55  private:
  56   RenderViewHost* render_view_host_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(RenderViewHostObserver);
  59 };
  60
  61 //
  62 // ExtensionRendererState::TabObserver
  63 //
  64
  65 // This class listens for notifications about changes in renderer state on the
  66 // UI thread, and notifies the ExtensionRendererState on the IO thread. It
  67 // should only ever be accessed on the UI thread.
  68 class ExtensionRendererState::TabObserver
  69     : public content::NotificationObserver {
  70  public:
  71   TabObserver();
  72   ~TabObserver() override;
  73
  74  private:
  75   // content::NotificationObserver interface.
  76   void Observe(int type,
  77                const content::NotificationSource& source,
  78                const content::NotificationDetails& details) override;
  79
  80   content::NotificationRegistrar registrar_;
  81 };
  82
  83 ExtensionRendererState::TabObserver::TabObserver() {
  84   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  85   registrar_.Add(this,
  86                  content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
  87                  content::NotificationService::AllBrowserContextsAndSources());
  88   registrar_.Add(this, chrome::NOTIFICATION_TAB_PARENTED,
  89                  content::NotificationService::AllBrowserContextsAndSources());
  90   registrar_.Add(this, chrome::NOTIFICATION_RETARGETING,
  91                  content::NotificationService::AllBrowserContextsAndSources());
  92 }
  93
  94 ExtensionRendererState::TabObserver::~TabObserver() {
  95   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  96 }
  97
  98 void ExtensionRendererState::TabObserver::Observe(
  99     int type, const content::NotificationSource& source,
 100     const content::NotificationDetails& details) {
 101   switch (type) {
 102     case content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED: {
 103       WebContents* web_contents = content::Source<WebContents>(source).ptr();
 104       SessionTabHelper* session_tab_helper =
 105           SessionTabHelper::FromWebContents(web_contents);
 106       if (!session_tab_helper)
 107         return;
 108       RenderViewHost* host = content::Details<RenderViewHost>(details).ptr();
 109       // TODO(mpcomplete): How can we tell if window_id is bogus? It may not
 110       // have been set yet.
 111       BrowserThread::PostTask(
 112           BrowserThread::IO, FROM_HERE,
 113           base::Bind(
 114               &ExtensionRendererState::SetTabAndWindowId,
 115               base::Unretained(ExtensionRendererState::GetInstance()),
 116               host->GetProcess()->GetID(), host->GetRoutingID(),
 117               session_tab_helper->session_id().id(),
 118               session_tab_helper->window_id().id()));
 119
 120       // The observer deletes itself.
 121       new ExtensionRendererState::RenderViewHostObserver(host, web_contents);
 122
 123       break;
 124     }
 125     case chrome::NOTIFICATION_TAB_PARENTED: {
 126       WebContents* web_contents = content::Source<WebContents>(source).ptr();
 127       SessionTabHelper* session_tab_helper =
 128           SessionTabHelper::FromWebContents(web_contents);
 129       if (!session_tab_helper)
 130         return;
 131       RenderViewHost* host = web_contents->GetRenderViewHost();
 132       BrowserThread::PostTask(
 133           BrowserThread::IO, FROM_HERE,
 134           base::Bind(
 135               &ExtensionRendererState::SetTabAndWindowId,
 136               base::Unretained(ExtensionRendererState::GetInstance()),
 137               host->GetProcess()->GetID(), host->GetRoutingID(),
 138               session_tab_helper->session_id().id(),
 139               session_tab_helper->window_id().id()));
 140       break;
 141     }
 142     case chrome::NOTIFICATION_RETARGETING: {
 143       RetargetingDetails* retargeting_details =
 144           content::Details<RetargetingDetails>(details).ptr();
 145       WebContents* web_contents = retargeting_details->target_web_contents;
 146       SessionTabHelper* session_tab_helper =
 147           SessionTabHelper::FromWebContents(web_contents);
 148       if (!session_tab_helper)
 149         return;
 150       RenderViewHost* host = web_contents->GetRenderViewHost();
 151       BrowserThread::PostTask(
 152           BrowserThread::IO, FROM_HERE,
 153           base::Bind(
 154               &ExtensionRendererState::SetTabAndWindowId,
 155               base::Unretained(ExtensionRendererState::GetInstance()),
 156               host->GetProcess()->GetID(), host->GetRoutingID(),
 157               session_tab_helper->session_id().id(),
 158               session_tab_helper->window_id().id()));
 159       break;
 160     }
 161     default:
 162       NOTREACHED();
 163       return;
 164   }
 165 }
 166
 167 //
 168 // ExtensionRendererState
 169 //
 170
 171 ExtensionRendererState::ExtensionRendererState() : observer_(NULL) {
 172 }
 173
 174 ExtensionRendererState::~ExtensionRendererState() {
 175 }
 176
 177 // static
 178 ExtensionRendererState* ExtensionRendererState::GetInstance() {
 179   return base::Singleton<ExtensionRendererState>::get();
 180 }
 181
 182 void ExtensionRendererState::Init() {
 183   observer_ = new TabObserver;
 184 }
 185
 186 void ExtensionRendererState::Shutdown() {
 187   delete observer_;
 188 }
 189
 190 void ExtensionRendererState::SetTabAndWindowId(
 191     int render_process_host_id, int routing_id, int tab_id, int window_id) {
 192   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 193   RenderId render_id(render_process_host_id, routing_id);
 194   map_[render_id] = TabAndWindowId(tab_id, window_id);
 195 }
 196
 197 void ExtensionRendererState::ClearTabAndWindowId(
 198     int render_process_host_id, int routing_id) {
 199   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 200   RenderId render_id(render_process_host_id, routing_id);
 201   map_.erase(render_id);
 202 }
 203
 204 bool ExtensionRendererState::GetTabAndWindowId(
 205     const  content::ResourceRequestInfo* info, int* tab_id, int* window_id) {
 206   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 207   int render_process_id;
 208   if (info->GetProcessType() == content::PROCESS_TYPE_PLUGIN) {
 209     render_process_id = info->GetOriginPID();
 210   } else {
 211     render_process_id = info->GetChildID();
 212   }
 213   int render_view_id = info->GetRouteID();
 214   RenderId render_id(render_process_id, render_view_id);
 215   TabAndWindowIdMap::iterator iter = map_.find(render_id);
 216   if (iter != map_.end()) {
 217     *tab_id = iter->second.first;
 218     *window_id = iter->second.second;
 219     return true;
 220   }
 221   return false;
 222 }