chrome_frame/chrome_frame_activex.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_frame/chrome_frame_activex.h"
   6
   7 #include <wininet.h>
   8
   9 #include <algorithm>
  10 #include <map>
  11
  12 #include "base/basictypes.h"
  13 #include "base/command_line.h"
  14 #include "base/debug/trace_event.h"
  15 #include "base/logging.h"
  16 #include "base/memory/singleton.h"
  17 #include "base/path_service.h"
  18 #include "base/process_util.h"
  19 #include "base/string_util.h"
  20 #include "base/stringprintf.h"
  21 #include "base/strings/string_split.h"
  22 #include "base/utf_string_conversions.h"
  23 #include "base/win/scoped_bstr.h"
  24 #include "base/win/scoped_variant.h"
  25 #include "chrome/common/automation_messages.h"
  26 #include "chrome/common/chrome_constants.h"
  27 #include "chrome/common/chrome_switches.h"
  28 #include "chrome/test/automation/tab_proxy.h"
  29 #include "chrome_frame/utils.h"
  30 #include "googleurl/src/gurl.h"
  31
  32 namespace {
  33
  34 // Class used to maintain a mapping from top-level windows to ChromeFrameActivex
  35 // instances.
  36 class TopLevelWindowMapping {
  37  public:
  38   typedef std::vector<HWND> WindowList;
  39
  40   static TopLevelWindowMapping* GetInstance() {
  41     return Singleton<TopLevelWindowMapping>::get();
  42   }
  43
  44   // Add |cf_window| to the set of windows registered under |top_window|.
  45   void AddMapping(HWND top_window, HWND cf_window) {
  46     top_window_map_lock_.Lock();
  47     top_window_map_[top_window].push_back(cf_window);
  48     top_window_map_lock_.Unlock();
  49   }
  50
  51   // Return the set of Chrome-Frame instances under |window|.
  52   WindowList GetInstances(HWND window) {
  53     top_window_map_lock_.Lock();
  54     WindowList list = top_window_map_[window];
  55     top_window_map_lock_.Unlock();
  56     return list;
  57   }
  58
  59  private:
  60   // Constructor is private as this class it to be used as a singleton.
  61   // See static method instance().
  62   TopLevelWindowMapping() {}
  63
  64   friend struct DefaultSingletonTraits<TopLevelWindowMapping>;
  65
  66   typedef std::map<HWND, WindowList> TopWindowMap;
  67   TopWindowMap top_window_map_;
  68
  69   CComAutoCriticalSection top_window_map_lock_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(TopLevelWindowMapping);
  72 };
  73
  74 // Message pump hook function that monitors for WM_MOVE and WM_MOVING
  75 // messages on a top-level window, and passes notification to the appropriate
  76 // Chrome-Frame instances.
  77 LRESULT CALLBACK TopWindowProc(int code, WPARAM wparam, LPARAM lparam) {
  78   CWPSTRUCT* info = reinterpret_cast<CWPSTRUCT*>(lparam);
  79   const UINT &message = info->message;
  80   const HWND &message_hwnd = info->hwnd;
  81
  82   switch (message) {
  83     case WM_MOVE:
  84     case WM_MOVING: {
  85       TopLevelWindowMapping::WindowList cf_instances =
  86           TopLevelWindowMapping::GetInstance()->GetInstances(message_hwnd);
  87       TopLevelWindowMapping::WindowList::iterator
  88           iter(cf_instances.begin()), end(cf_instances.end());
  89       for (; iter != end; ++iter) {
  90         PostMessage(*iter, WM_HOST_MOVED_NOTIFICATION, NULL, NULL);
  91       }
  92       break;
  93     }
  94     default:
  95       break;
  96   }
  97
  98   return CallNextHookEx(0, code, wparam, lparam);
  99 }
 100
 101 HHOOK InstallLocalWindowHook(HWND window) {
 102   if (!window)
 103     return NULL;
 104
 105   DWORD proc_thread = ::GetWindowThreadProcessId(window, NULL);
 106   if (!proc_thread)
 107     return NULL;
 108
 109   // Note that this hook is installed as a LOCAL hook.
 110   return  ::SetWindowsHookEx(WH_CALLWNDPROC,
 111                              TopWindowProc,
 112                              NULL,
 113                              proc_thread);
 114 }
 115
 116 }  // unnamed namespace
 117
 118 namespace chrome_frame {
 119 std::string ActiveXCreateUrl(const GURL& parsed_url,
 120                              const AttachExternalTabParams& params) {
 121   return base::StringPrintf(
 122       "%hs?attach_external_tab&%I64u&%d&%d&%d&%d&%d&%hs",
 123       parsed_url.GetOrigin().spec().c_str(),
 124       params.cookie,
 125       params.disposition,
 126       params.dimensions.x(),
 127       params.dimensions.y(),
 128       params.dimensions.width(),
 129       params.dimensions.height(),
 130       params.profile_name.c_str());
 131 }
 132
 133 int GetDisposition(const AttachExternalTabParams& params) {
 134   return params.disposition;
 135 }
 136
 137 void GetMiniContextMenuData(UINT cmd,
 138                             const MiniContextMenuParams& params,
 139                             GURL* referrer,
 140                             GURL* url) {
 141   *referrer = params.frame_url.is_empty() ? params.page_url : params.frame_url;
 142   *url = (cmd == IDS_CONTENT_CONTEXT_SAVELINKAS ?
 143       params.link_url : params.src_url);
 144 }
 145
 146 }  // namespace chrome_frame
 147
 148 ChromeFrameActivex::ChromeFrameActivex()
 149     : chrome_wndproc_hook_(NULL),
 150       attaching_to_existing_cf_tab_(false) {
 151   TRACE_EVENT_BEGIN_ETW("chromeframe.createactivex", this, "");
 152 }
 153
 154 HRESULT ChromeFrameActivex::FinalConstruct() {
 155   HRESULT hr = Base::FinalConstruct();
 156   if (FAILED(hr))
 157     return hr;
 158
 159   // No need to call FireOnChanged at this point since nobody will be listening.
 160   ready_state_ = READYSTATE_LOADING;
 161   return S_OK;
 162 }
 163
 164 ChromeFrameActivex::~ChromeFrameActivex() {
 165   // We expect these to be released during a call to SetClientSite(NULL).
 166   DCHECK_EQ(0u, onmessage_.size());
 167   DCHECK_EQ(0u, onloaderror_.size());
 168   DCHECK_EQ(0u, onload_.size());
 169   DCHECK_EQ(0u, onreadystatechanged_.size());
 170   DCHECK_EQ(0u, onextensionready_.size());
 171
 172   if (chrome_wndproc_hook_) {
 173     BOOL unhook_success = ::UnhookWindowsHookEx(chrome_wndproc_hook_);
 174     DCHECK(unhook_success);
 175   }
 176
 177   // ChromeFramePlugin::Uninitialize()
 178   Base::Uninitialize();
 179
 180   TRACE_EVENT_END_ETW("chromeframe.createactivex", this, "");
 181 }
 182
 183 LRESULT ChromeFrameActivex::OnCreate(UINT message, WPARAM wparam, LPARAM lparam,
 184                                      BOOL& handled) {
 185   Base::OnCreate(message, wparam, lparam, handled);
 186   // Install the notification hook on the top-level window, so that we can
 187   // be notified on move events.  Note that the return value is not checked.
 188   // This hook is installed here, as opposed to during IOleObject_SetClientSite
 189   // because m_hWnd has not yet been assigned during the SetSite call.
 190   InstallTopLevelHook(m_spClientSite);
 191   return 0;
 192 }
 193
 194 LRESULT ChromeFrameActivex::OnHostMoved(UINT message, WPARAM wparam,
 195                                         LPARAM lparam, BOOL& handled) {
 196   Base::OnHostMoved();
 197   return 0;
 198 }
 199
 200 HRESULT ChromeFrameActivex::GetContainingDocument(IHTMLDocument2** doc) {
 201   base::win::ScopedComPtr<IOleContainer> container;
 202   HRESULT hr = m_spClientSite->GetContainer(container.Receive());
 203   if (container)
 204     hr = container.QueryInterface(doc);
 205   return hr;
 206 }
 207
 208 HRESULT ChromeFrameActivex::GetDocumentWindow(IHTMLWindow2** window) {
 209   base::win::ScopedComPtr<IHTMLDocument2> document;
 210   HRESULT hr = GetContainingDocument(document.Receive());
 211   if (document)
 212     hr = document->get_parentWindow(window);
 213   return hr;
 214 }
 215
 216 void ChromeFrameActivex::OnLoad(const GURL& gurl) {
 217   base::win::ScopedComPtr<IDispatch> event;
 218   std::string url = gurl.spec();
 219   if (SUCCEEDED(CreateDomEvent("event", url, "", event.Receive())))
 220     Fire_onload(event);
 221
 222   FireEvent(onload_, url);
 223   Base::OnLoad(gurl);
 224 }
 225
 226 void ChromeFrameActivex::OnLoadFailed(int error_code, const std::string& url) {
 227   base::win::ScopedComPtr<IDispatch> event;
 228   if (SUCCEEDED(CreateDomEvent("event", url, "", event.Receive())))
 229     Fire_onloaderror(event);
 230
 231   FireEvent(onloaderror_, url);
 232   Base::OnLoadFailed(error_code, url);
 233 }
 234
 235 void ChromeFrameActivex::OnMessageFromChromeFrame(const std::string& message,
 236                                                   const std::string& origin,
 237                                                   const std::string& target) {
 238   DVLOG(1) << __FUNCTION__;
 239
 240   if (target.compare("*") != 0) {
 241     bool drop = true;
 242
 243     if (is_privileged()) {
 244       // Forward messages if the control is in privileged mode.
 245       base::win::ScopedComPtr<IDispatch> message_event;
 246       if (SUCCEEDED(CreateDomEvent("message", message, origin,
 247                                    message_event.Receive()))) {
 248         base::win::ScopedBstr target_bstr(UTF8ToWide(target).c_str());
 249         Fire_onprivatemessage(message_event, target_bstr);
 250
 251         FireEvent(onprivatemessage_, message_event, target_bstr);
 252       }
 253     } else {
 254       if (HaveSameOrigin(target, document_url_)) {
 255         drop = false;
 256       } else {
 257         DLOG(WARNING) << "Dropping posted message since target doesn't match "
 258             "the current document's origin. target=" << target;
 259       }
 260     }
 261
 262     if (drop)
 263       return;
 264   }
 265
 266   base::win::ScopedComPtr<IDispatch> message_event;
 267   if (SUCCEEDED(CreateDomEvent("message", message, origin,
 268                                message_event.Receive()))) {
 269     Fire_onmessage(message_event);
 270
 271     FireEvent(onmessage_, message_event);
 272
 273     base::win::ScopedVariant event_var;
 274     event_var.Set(static_cast<IDispatch*>(message_event));
 275     InvokeScriptFunction(onmessage_handler_, event_var.AsInput());
 276   }
 277 }
 278
 279 bool ChromeFrameActivex::ShouldShowVersionMismatchDialog(
 280     bool is_privileged,
 281     IOleClientSite* client_site) {
 282   if (!is_privileged) {
 283     return true;
 284   }
 285
 286   if (client_site) {
 287     base::win::ScopedComPtr<IChromeFramePrivileged> service;
 288     HRESULT hr = DoQueryService(SID_ChromeFramePrivileged,
 289                                 client_site,
 290                                 service.Receive());
 291     if (SUCCEEDED(hr) && service) {
 292       return (S_FALSE != service->ShouldShowVersionMismatchDialog());
 293     }
 294   }
 295
 296   NOTREACHED();
 297   return true;
 298 }
 299
 300 void ChromeFrameActivex::OnAutomationServerLaunchFailed(
 301     AutomationLaunchResult reason, const std::string& server_version) {
 302   Base::OnAutomationServerLaunchFailed(reason, server_version);
 303
 304   if (reason == AUTOMATION_VERSION_MISMATCH &&
 305       ShouldShowVersionMismatchDialog(is_privileged(), m_spClientSite)) {
 306     UMA_HISTOGRAM_COUNTS("ChromeFrame.VersionMismatchDisplayed", 1);
 307     DisplayVersionMismatchWarning(m_hWnd, server_version);
 308   }
 309 }
 310
 311 void ChromeFrameActivex::OnChannelError() {
 312   Fire_onchannelerror();
 313 }
 314
 315 HRESULT ChromeFrameActivex::OnDraw(ATL_DRAWINFO& draw_info) {  // NOLINT
 316   HRESULT hr = S_OK;
 317   int dc_type = ::GetObjectType(draw_info.hicTargetDev);
 318   if (dc_type == OBJ_ENHMETADC) {
 319     RECT print_bounds = {0};
 320     print_bounds.left = draw_info.prcBounds->left;
 321     print_bounds.right = draw_info.prcBounds->right;
 322     print_bounds.top = draw_info.prcBounds->top;
 323     print_bounds.bottom = draw_info.prcBounds->bottom;
 324
 325     automation_client_->Print(draw_info.hdcDraw, print_bounds);
 326   } else {
 327     hr = Base::OnDraw(draw_info);
 328   }
 329
 330   return hr;
 331 }
 332
 333 STDMETHODIMP ChromeFrameActivex::Load(IPropertyBag* bag, IErrorLog* error_log) {
 334   DCHECK(bag);
 335
 336   const wchar_t* event_props[] = {
 337     (L"onload"),
 338     (L"onloaderror"),
 339     (L"onmessage"),
 340     (L"onreadystatechanged"),
 341   };
 342
 343   base::win::ScopedComPtr<IHTMLObjectElement> obj_element;
 344   GetObjectElement(obj_element.Receive());
 345
 346   base::win::ScopedBstr object_id;
 347   GetObjectScriptId(obj_element, object_id.Receive());
 348
 349   base::win::ScopedComPtr<IHTMLElement2> element;
 350   element.QueryFrom(obj_element);
 351   HRESULT hr = S_OK;
 352
 353   for (int i = 0; SUCCEEDED(hr) && i < arraysize(event_props); ++i) {
 354     base::win::ScopedBstr prop(event_props[i]);
 355     base::win::ScopedVariant value;
 356     if (SUCCEEDED(bag->Read(prop, value.Receive(), error_log))) {
 357       if (value.type() != VT_BSTR ||
 358           FAILED(hr = CreateScriptBlockForEvent(element, object_id,
 359                                                 V_BSTR(&value), prop))) {
 360         DLOG(ERROR) << "Failed to create script block for " << prop
 361                     << base::StringPrintf(L"hr=0x%08X, vt=%i", hr,
 362                                          value.type());
 363       } else {
 364         DVLOG(1) << "script block created for event " << prop
 365                  << base::StringPrintf(" (0x%08X)", hr) << " connections: " <<
 366             ProxyDIChromeFrameEvents<ChromeFrameActivex>::m_vec.GetSize();
 367       }
 368     } else {
 369       DVLOG(1) << "event property " << prop << " not in property bag";
 370     }
 371   }
 372
 373   base::win::ScopedVariant src;
 374   if (SUCCEEDED(bag->Read(base::win::ScopedBstr(L"src"), src.Receive(),
 375                           error_log))) {
 376     if (src.type() == VT_BSTR) {
 377       hr = put_src(V_BSTR(&src));
 378       DCHECK(hr != E_UNEXPECTED);
 379     }
 380   }
 381
 382   base::win::ScopedVariant use_chrome_network;
 383   if (SUCCEEDED(bag->Read(base::win::ScopedBstr(L"useChromeNetwork"),
 384                           use_chrome_network.Receive(), error_log))) {
 385     VariantChangeType(use_chrome_network.AsInput(),
 386                       use_chrome_network.AsInput(),
 387                       0, VT_BOOL);
 388     if (use_chrome_network.type() == VT_BOOL) {
 389       hr = put_useChromeNetwork(V_BOOL(&use_chrome_network));
 390       DCHECK(hr != E_UNEXPECTED);
 391     }
 392   }
 393
 394   DLOG_IF(ERROR, FAILED(hr))
 395       << base::StringPrintf("Failed to load property bag: 0x%08X", hr);
 396
 397   return hr;
 398 }
 399
 400 const wchar_t g_activex_insecure_content_error[] = {
 401     L"data:text/html,<html><body><b>ChromeFrame Security Error<br><br>"
 402     L"Cannot navigate to HTTP url when document URL is HTTPS</body></html>"};
 403
 404 STDMETHODIMP ChromeFrameActivex::put_src(BSTR src) {
 405   GURL document_url(GetDocumentUrl());
 406   if (document_url.SchemeIsSecure()) {
 407     GURL source_url(src);
 408     if (!source_url.SchemeIsSecure()) {
 409       Base::put_src(base::win::ScopedBstr(g_activex_insecure_content_error));
 410       return E_ACCESSDENIED;
 411     }
 412   }
 413   HRESULT hr = S_OK;
 414   // If we are connecting to an existing ExternalTabContainer instance in
 415   // Chrome then we should wait for Chrome to initiate the navigation.
 416   if (!attaching_to_existing_cf_tab_) {
 417     hr = Base::put_src(src);
 418   } else {
 419     url_.Reset(::SysAllocString(src));
 420     attaching_to_existing_cf_tab_ = false;
 421   }
 422   return S_OK;
 423 }
 424
 425 HRESULT ChromeFrameActivex::IOleObject_SetClientSite(
 426     IOleClientSite* client_site) {
 427   HRESULT hr = Base::IOleObject_SetClientSite(client_site);
 428   if (FAILED(hr) || !client_site) {
 429     EventHandlers* handlers[] = {
 430       &onmessage_,
 431       &onloaderror_,
 432       &onload_,
 433       &onreadystatechanged_,
 434       &onextensionready_,
 435     };
 436
 437     for (int i = 0; i < arraysize(handlers); ++i)
 438       handlers[i]->clear();
 439
 440     // Drop privileged mode on uninitialization.
 441     set_is_privileged(false);
 442   } else {
 443     base::win::ScopedComPtr<IHTMLDocument2> document;
 444     GetContainingDocument(document.Receive());
 445     if (document) {
 446       base::win::ScopedBstr url;
 447       if (SUCCEEDED(document->get_URL(url.Receive())))
 448         WideToUTF8(url, url.Length(), &document_url_);
 449     }
 450
 451     // Probe to see whether the host implements the privileged service.
 452     base::win::ScopedComPtr<IChromeFramePrivileged> service;
 453     HRESULT service_hr = DoQueryService(SID_ChromeFramePrivileged,
 454                                         m_spClientSite,
 455                                         service.Receive());
 456     if (SUCCEEDED(service_hr) && service) {
 457       // Does the host want privileged mode?
 458       boolean wants_privileged = false;
 459       service_hr = service->GetWantsPrivileged(&wants_privileged);
 460
 461       if (SUCCEEDED(service_hr) && wants_privileged)
 462         set_is_privileged(true);
 463
 464       url_fetcher_->set_privileged_mode(is_privileged());
 465     }
 466
 467     std::wstring profile_name(GetHostProcessName(false));
 468     if (is_privileged()) {
 469       base::win::ScopedBstr profile_name_arg;
 470       service_hr = service->GetChromeProfileName(profile_name_arg.Receive());
 471       if (S_OK == service_hr && profile_name_arg)
 472         profile_name.assign(profile_name_arg, profile_name_arg.Length());
 473     }
 474
 475     std::string utf8_url;
 476     if (url_.Length()) {
 477       WideToUTF8(url_, url_.Length(), &utf8_url);
 478     }
 479
 480     InitializeAutomationSettings();
 481
 482     if (service) {
 483       base::win::ScopedBstr navigation_url;
 484       service->GetNavigationUrl(navigation_url.Receive());
 485       if (navigation_url.Length()) {
 486         ChromeFrameUrl cf_url;
 487         cf_url.Parse(navigation_url.operator BSTR());
 488         if (cf_url.attach_to_external_tab()) {
 489           automation_client_->AttachExternalTab(cf_url.cookie());
 490           attaching_to_existing_cf_tab_ = true;
 491         }
 492       }
 493     }
 494     url_fetcher_->set_frame_busting(!is_privileged());
 495     automation_client_->SetUrlFetcher(url_fetcher_.get());
 496     if (!InitializeAutomation(profile_name, IsIEInPrivate(), true,
 497                               GURL(utf8_url), GURL(), false)) {
 498       DLOG(ERROR) << "Failed to navigate to url:" << utf8_url;
 499       return E_FAIL;
 500     }
 501
 502     // Log a metric that Chrome Frame is being used in Widget mode
 503     UMA_LAUNCH_TYPE_COUNT(RENDERER_TYPE_CHROME_WIDGET);
 504   }
 505
 506   return hr;
 507 }
 508
 509 HRESULT ChromeFrameActivex::GetObjectScriptId(IHTMLObjectElement* object_elem,
 510                                               BSTR* id) {
 511   DCHECK(object_elem != NULL);
 512   DCHECK(id != NULL);
 513
 514   HRESULT hr = E_FAIL;
 515   if (object_elem) {
 516     base::win::ScopedComPtr<IHTMLElement> elem;
 517     hr = elem.QueryFrom(object_elem);
 518     if (elem) {
 519       hr = elem->get_id(id);
 520     }
 521   }
 522
 523   return hr;
 524 }
 525
 526 HRESULT ChromeFrameActivex::GetObjectElement(IHTMLObjectElement** element) {
 527   DCHECK(m_spClientSite);
 528   if (!m_spClientSite)
 529     return E_UNEXPECTED;
 530
 531   base::win::ScopedComPtr<IOleControlSite> site;
 532   HRESULT hr = site.QueryFrom(m_spClientSite);
 533   if (site) {
 534     base::win::ScopedComPtr<IDispatch> disp;
 535     hr = site->GetExtendedControl(disp.Receive());
 536     if (disp) {
 537       hr = disp.QueryInterface(element);
 538     } else {
 539       DCHECK(FAILED(hr));
 540     }
 541   }
 542
 543   return hr;
 544 }
 545
 546 HRESULT ChromeFrameActivex::CreateScriptBlockForEvent(
 547     IHTMLElement2* insert_after, BSTR instance_id, BSTR script,
 548     BSTR event_name) {
 549   DCHECK(insert_after);
 550   DCHECK_GT(::SysStringLen(event_name), 0UL);  // should always have this
 551
 552   // This might be 0 if not specified in the HTML document.
 553   if (!::SysStringLen(instance_id)) {
 554     // TODO(tommi): Should we give ourselves an ID if this happens?
 555     NOTREACHED() << "Need to handle this";
 556     return E_INVALIDARG;
 557   }
 558
 559   base::win::ScopedComPtr<IHTMLDocument2> document;
 560   HRESULT hr = GetContainingDocument(document.Receive());
 561   if (SUCCEEDED(hr)) {
 562     base::win::ScopedComPtr<IHTMLElement> element, new_element;
 563     document->createElement(base::win::ScopedBstr(L"script"),
 564                             element.Receive());
 565     if (element) {
 566       base::win::ScopedComPtr<IHTMLScriptElement> script_element;
 567       if (SUCCEEDED(hr = script_element.QueryFrom(element))) {
 568         script_element->put_htmlFor(instance_id);
 569         script_element->put_event(event_name);
 570         script_element->put_text(script);
 571
 572         hr = insert_after->insertAdjacentElement(
 573             base::win::ScopedBstr(L"afterEnd"),
 574             element,
 575             new_element.Receive());
 576       }
 577     }
 578   }
 579
 580   return hr;
 581 }
 582
 583 void ChromeFrameActivex::FireEvent(const EventHandlers& handlers,
 584                                    const std::string& arg) {
 585   if (handlers.size()) {
 586     base::win::ScopedComPtr<IDispatch> event;
 587     if (SUCCEEDED(CreateDomEvent("event", arg, "", event.Receive()))) {
 588       FireEvent(handlers, event);
 589     }
 590   }
 591 }
 592
 593 void ChromeFrameActivex::FireEvent(const EventHandlers& handlers,
 594                                    IDispatch* event) {
 595   DCHECK(event != NULL);
 596   VARIANT arg = { VT_DISPATCH };
 597   arg.pdispVal = event;
 598   DISPPARAMS params = { &arg, NULL, 1, 0 };
 599   for (EventHandlers::const_iterator it = handlers.begin();
 600        it != handlers.end();
 601        ++it) {
 602     HRESULT hr = (*it)->Invoke(DISPID_VALUE, IID_NULL, LOCALE_USER_DEFAULT,
 603                                DISPATCH_METHOD, &params, NULL, NULL, NULL);
 604     // 0x80020101 == SCRIPT_E_REPORTED.
 605     // When the script we're invoking has an error, we get this error back.
 606     DLOG_IF(ERROR, FAILED(hr) && hr != 0x80020101)
 607         << base::StringPrintf(L"Failed to invoke script: 0x%08X", hr);
 608   }
 609 }
 610
 611 void ChromeFrameActivex::FireEvent(const EventHandlers& handlers,
 612                                    IDispatch* event, BSTR target) {
 613   DCHECK(event != NULL);
 614   // Arguments in reverse order to event handler function declaration,
 615   // because that's what DISPPARAMS requires.
 616   VARIANT args[2] = { { VT_BSTR }, { VT_DISPATCH }, };
 617   args[0].bstrVal = target;
 618   args[1].pdispVal = event;
 619   DISPPARAMS params = { args, NULL, arraysize(args), 0 };
 620   for (EventHandlers::const_iterator it = handlers.begin();
 621        it != handlers.end();
 622        ++it) {
 623     HRESULT hr = (*it)->Invoke(DISPID_VALUE, IID_NULL, LOCALE_USER_DEFAULT,
 624                                DISPATCH_METHOD, &params, NULL, NULL, NULL);
 625     // 0x80020101 == SCRIPT_E_REPORTED.
 626     // When the script we're invoking has an error, we get this error back.
 627     DLOG_IF(ERROR, FAILED(hr) && hr != 0x80020101)
 628         << base::StringPrintf(L"Failed to invoke script: 0x%08X", hr);
 629   }
 630 }
 631
 632 HRESULT ChromeFrameActivex::InstallTopLevelHook(IOleClientSite* client_site) {
 633   // Get the parent window of the site, and install our hook on the topmost
 634   // window of the parent.
 635   base::win::ScopedComPtr<IOleWindow> ole_window;
 636   HRESULT hr = ole_window.QueryFrom(client_site);
 637   if (FAILED(hr))
 638     return hr;
 639
 640   HWND parent_wnd;
 641   hr = ole_window->GetWindow(&parent_wnd);
 642   if (FAILED(hr))
 643     return hr;
 644
 645   HWND top_window = ::GetAncestor(parent_wnd, GA_ROOT);
 646   chrome_wndproc_hook_ = InstallLocalWindowHook(top_window);
 647   if (chrome_wndproc_hook_)
 648     TopLevelWindowMapping::GetInstance()->AddMapping(top_window, m_hWnd);
 649
 650   return chrome_wndproc_hook_ ? S_OK : E_FAIL;
 651 }
 652
 653 HRESULT ChromeFrameActivex::registerBhoIfNeeded() {
 654   if (!m_spUnkSite) {
 655     NOTREACHED() << "Invalid client site";
 656     return E_FAIL;
 657   }
 658
 659   if (NavigationManager::GetThreadInstance() != NULL) {
 660     DVLOG(1) << "BHO already loaded";
 661     return S_OK;
 662   }
 663
 664   base::win::ScopedComPtr<IWebBrowser2> web_browser2;
 665   HRESULT hr = DoQueryService(SID_SWebBrowserApp, m_spUnkSite,
 666                               web_browser2.Receive());
 667   if (FAILED(hr) || web_browser2.get() == NULL) {
 668     DLOG(WARNING) << "Failed to get IWebBrowser2 from client site. Error:"
 669                   << base::StringPrintf(" 0x%08X", hr);
 670     return hr;
 671   }
 672
 673   wchar_t bho_class_id_as_string[MAX_PATH] = {0};
 674   StringFromGUID2(CLSID_ChromeFrameBHO, bho_class_id_as_string,
 675                   arraysize(bho_class_id_as_string));
 676
 677   base::win::ScopedComPtr<IObjectWithSite> bho;
 678   hr = bho.CreateInstance(CLSID_ChromeFrameBHO, NULL, CLSCTX_INPROC_SERVER);
 679   if (FAILED(hr)) {
 680     NOTREACHED() << "Failed to register ChromeFrame BHO. Error:"
 681                  << base::StringPrintf(" 0x%08X", hr);
 682     return hr;
 683   }
 684
 685   hr = UrlMkSetSessionOption(URLMON_OPTION_USERAGENT_REFRESH, NULL, 0, 0);
 686   if (FAILED(hr)) {
 687     DLOG(ERROR) << "Failed to refresh user agent string from registry. "
 688                 << "UrlMkSetSessionOption returned "
 689                 << base::StringPrintf("0x%08x", hr);
 690     return hr;
 691   }
 692
 693   hr = bho->SetSite(web_browser2);
 694   if (FAILED(hr)) {
 695     NOTREACHED() << "ChromeFrame BHO SetSite failed. Error:"
 696                  << base::StringPrintf(" 0x%08X", hr);
 697     return hr;
 698   }
 699
 700   web_browser2->PutProperty(base::win::ScopedBstr(bho_class_id_as_string),
 701                             base::win::ScopedVariant(bho));
 702   return S_OK;
 703 }