The Tor Browser: content/base/src/nsFrameLoader.cpp@deefc01c0e14

Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim: set ts=2 sw=2 et tw=78: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 /*

     8  * Class for managing loading of a subframe (creation of the docshell,

     9  * handling of loads in it, recursion-checking).

    10  */

    12 #include "base/basictypes.h"

    14 #include "prenv.h"

    16 #include "mozIApplication.h"

    17 #include "nsIDOMHTMLIFrameElement.h"

    18 #include "nsIDOMHTMLFrameElement.h"

    19 #include "nsIDOMMozBrowserFrame.h"

    20 #include "nsIDOMWindow.h"

    21 #include "nsIPresShell.h"

    22 #include "nsIContentInlines.h"

    23 #include "nsIContentViewer.h"

    24 #include "nsIDocument.h"

    25 #include "nsIDOMDocument.h"

    26 #include "nsIDOMFile.h"

    27 #include "nsPIDOMWindow.h"

    28 #include "nsIWebNavigation.h"

    29 #include "nsIWebProgress.h"

    30 #include "nsIDocShell.h"

    31 #include "nsIDocShellTreeOwner.h"

    32 #include "nsIDocShellLoadInfo.h"

    33 #include "nsIDOMApplicationRegistry.h"

    34 #include "nsIBaseWindow.h"

    35 #include "nsContentUtils.h"

    36 #include "nsCxPusher.h"

    37 #include "nsIXPConnect.h"

    38 #include "nsUnicharUtils.h"

    39 #include "nsIScriptGlobalObject.h"

    40 #include "nsIScriptSecurityManager.h"

    41 #include "nsIScrollable.h"

    42 #include "nsFrameLoader.h"

    43 #include "nsIDOMEventTarget.h"

    44 #include "nsIFrame.h"

    45 #include "nsIScrollableFrame.h"

    46 #include "nsSubDocumentFrame.h"

    47 #include "nsError.h"

    48 #include "nsISHistory.h"

    49 #include "nsISHistoryInternal.h"

    50 #include "nsIDOMHTMLDocument.h"

    51 #include "nsIXULWindow.h"

    52 #include "nsIEditor.h"

    53 #include "nsIMozBrowserFrame.h"

    54 #include "nsIPermissionManager.h"

    55 #include "nsISHistory.h"

    56 #include "nsNullPrincipal.h"

    58 #include "nsLayoutUtils.h"

    59 #include "nsView.h"

    61 #include "nsIURI.h"

    62 #include "nsIURL.h"

    63 #include "nsNetUtil.h"

    65 #include "nsGkAtoms.h"

    66 #include "nsNameSpaceManager.h"

    68 #include "nsThreadUtils.h"

    70 #include "nsIDOMChromeWindow.h"

    71 #include "nsInProcessTabChildGlobal.h"

    73 #include "Layers.h"

    75 #include "AppProcessChecker.h"

    76 #include "ContentParent.h"

    77 #include "TabParent.h"

    78 #include "mozilla/AsyncEventDispatcher.h"

    79 #include "mozilla/GuardObjects.h"

    80 #include "mozilla/Preferences.h"

    81 #include "mozilla/unused.h"

    82 #include "mozilla/dom/Element.h"

    83 #include "mozilla/layout/RenderFrameParent.h"

    84 #include "nsIAppsService.h"

    85 #include "GeckoProfiler.h"

    87 #include "jsapi.h"

    88 #include "mozilla/dom/HTMLIFrameElement.h"

    89 #include "nsSandboxFlags.h"

    90 #include "JavaScriptParent.h"

    92 #include "mozilla/dom/StructuredCloneUtils.h"

    94 #ifdef MOZ_XUL

    95 #include "nsXULPopupManager.h"

    96 #endif

    98 using namespace mozilla;

    99 using namespace mozilla::hal;

   100 using namespace mozilla::dom;

   101 using namespace mozilla::dom::ipc;

   102 using namespace mozilla::layers;

   103 using namespace mozilla::layout;

   104 typedef FrameMetrics::ViewID ViewID;

   106 class nsAsyncDocShellDestroyer : public nsRunnable

   107 {

   108 public:

   109   nsAsyncDocShellDestroyer(nsIDocShell* aDocShell)

   110     : mDocShell(aDocShell)

   111   {

   112   }

   114   NS_IMETHOD Run()

   115   {

   116     nsCOMPtr<nsIBaseWindow> base_win(do_QueryInterface(mDocShell));

   117     if (base_win) {

   118       base_win->Destroy();

   119     }

   120     return NS_OK;

   121   }

   122   nsRefPtr<nsIDocShell> mDocShell;

   123 };

   125 NS_IMPL_ISUPPORTS(nsContentView, nsIContentView)

   127 nsresult

   128 nsContentView::Update(const ViewConfig& aConfig)

   129 {

   130   if (aConfig == mConfig) {

   131     return NS_OK;

   132   }

   133   mConfig = aConfig;

   135   // View changed.  Try to locate our subdoc frame and invalidate

   136   // it if found.

   137   if (!mFrameLoader) {

   138     if (IsRoot()) {

   139       // Oops, don't have a frame right now.  That's OK; the view

   140       // config persists and will apply to the next frame we get, if we

   141       // ever get one.

   142       return NS_OK;

   143     } else {

   144       // This view is no longer valid.

   145       return NS_ERROR_NOT_AVAILABLE;

   146     }

   147   }

   149   if (RenderFrameParent* rfp = mFrameLoader->GetCurrentRemoteFrame()) {

   150     rfp->ContentViewScaleChanged(this);

   151   }

   153   return NS_OK;

   154 }

   156 NS_IMETHODIMP

   157 nsContentView::ScrollTo(float aXpx, float aYpx)

   158 {

   159   ViewConfig config(mConfig);

   160   config.mScrollOffset = nsPoint(nsPresContext::CSSPixelsToAppUnits(aXpx),

   161                                  nsPresContext::CSSPixelsToAppUnits(aYpx));

   162   return Update(config);

   163 }

   165 NS_IMETHODIMP

   166 nsContentView::ScrollBy(float aDXpx, float aDYpx)

   167 {

   168   ViewConfig config(mConfig);

   169   config.mScrollOffset.MoveBy(nsPresContext::CSSPixelsToAppUnits(aDXpx),

   170                               nsPresContext::CSSPixelsToAppUnits(aDYpx));

   171   return Update(config);

   172 }

   174 NS_IMETHODIMP

   175 nsContentView::SetScale(float aXScale, float aYScale)

   176 {

   177   ViewConfig config(mConfig);

   178   config.mXScale = aXScale;

   179   config.mYScale = aYScale;

   180   return Update(config);

   181 }

   183 NS_IMETHODIMP

   184 nsContentView::GetScrollX(float* aViewScrollX)

   185 {

   186   *aViewScrollX = nsPresContext::AppUnitsToFloatCSSPixels(

   187     mConfig.mScrollOffset.x);

   188   return NS_OK;

   189 }

   191 NS_IMETHODIMP

   192 nsContentView::GetScrollY(float* aViewScrollY)

   193 {

   194   *aViewScrollY = nsPresContext::AppUnitsToFloatCSSPixels(

   195     mConfig.mScrollOffset.y);

   196   return NS_OK;

   197 }

   199 NS_IMETHODIMP

   200 nsContentView::GetViewportWidth(float* aWidth)

   201 {

   202   *aWidth = nsPresContext::AppUnitsToFloatCSSPixels(mViewportSize.width);

   203   return NS_OK;

   204 }

   206 NS_IMETHODIMP

   207 nsContentView::GetViewportHeight(float* aHeight)

   208 {

   209   *aHeight = nsPresContext::AppUnitsToFloatCSSPixels(mViewportSize.height);

   210   return NS_OK;

   211 }

   213 NS_IMETHODIMP

   214 nsContentView::GetContentWidth(float* aWidth)

   215 {

   216   *aWidth = nsPresContext::AppUnitsToFloatCSSPixels(mContentSize.width);

   217   return NS_OK;

   218 }

   220 NS_IMETHODIMP

   221 nsContentView::GetContentHeight(float* aHeight)

   222 {

   223   *aHeight = nsPresContext::AppUnitsToFloatCSSPixels(mContentSize.height);

   224   return NS_OK;

   225 }

   227 NS_IMETHODIMP

   228 nsContentView::GetId(nsContentViewId* aId)

   229 {

   230   NS_ASSERTION(sizeof(nsContentViewId) == sizeof(ViewID),

   231                "ID size for XPCOM ID and internal ID type are not the same!");

   232   *aId = mScrollId;

   233   return NS_OK;

   234 }

   236 // Bug 136580: Limit to the number of nested content frames that can have the

   237 //             same URL. This is to stop content that is recursively loading

   238 //             itself.  Note that "#foo" on the end of URL doesn't affect

   239 //             whether it's considered identical, but "?foo" or ";foo" are

   240 //             considered and compared.

   241 // Bug 228829: Limit this to 1, like IE does.

   242 #define MAX_SAME_URL_CONTENT_FRAMES 1

   244 // Bug 8065: Limit content frame depth to some reasonable level. This

   245 // does not count chrome frames when determining depth, nor does it

   246 // prevent chrome recursion.  Number is fairly arbitrary, but meant to

   247 // keep number of shells to a reasonable number on accidental recursion with a

   248 // small (but not 1) branching factor.  With large branching factors the number

   249 // of shells can rapidly become huge and run us out of memory.  To solve that,

   250 // we'd need to re-institute a fixed version of bug 98158.

   251 #define MAX_DEPTH_CONTENT_FRAMES 10

   253 NS_IMPL_CYCLE_COLLECTION(nsFrameLoader, mDocShell, mMessageManager, mChildMessageManager)

   254 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsFrameLoader)

   255 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsFrameLoader)

   257 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsFrameLoader)

   258   NS_INTERFACE_MAP_ENTRY(nsIFrameLoader)

   259   NS_INTERFACE_MAP_ENTRY(nsIContentViewManager)

   260   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIFrameLoader)

   261 NS_INTERFACE_MAP_END

   263 nsFrameLoader::nsFrameLoader(Element* aOwner, bool aNetworkCreated)

   264   : mOwnerContent(aOwner)

   265   , mAppIdSentToPermissionManager(nsIScriptSecurityManager::NO_APP_ID)

   266   , mDetachedSubdocViews(nullptr)

   267   , mDepthTooGreat(false)

   268   , mIsTopLevelContent(false)

   269   , mDestroyCalled(false)

   270   , mNeedsAsyncDestroy(false)

   271   , mInSwap(false)

   272   , mInShow(false)

   273   , mHideCalled(false)

   274   , mNetworkCreated(aNetworkCreated)

   275   , mRemoteBrowserShown(false)

   276   , mRemoteFrame(false)

   277   , mClipSubdocument(true)

   278   , mClampScrollPosition(true)

   279   , mRemoteBrowserInitialized(false)

   280   , mObservingOwnerContent(false)

   281   , mVisible(true)

   282   , mCurrentRemoteFrame(nullptr)

   283   , mRemoteBrowser(nullptr)

   284   , mChildID(0)

   285   , mRenderMode(RENDER_MODE_DEFAULT)

   286   , mEventMode(EVENT_MODE_NORMAL_DISPATCH)

   287   , mPendingFrameSent(false)

   288 {

   289   ResetPermissionManagerStatus();

   290 }

   292 nsFrameLoader::~nsFrameLoader()

   293 {

   294   mNeedsAsyncDestroy = true;

   295   if (mMessageManager) {

   296     mMessageManager->Disconnect();

   297   }

   298   nsFrameLoader::Destroy();

   299 }

   301 nsFrameLoader*

   302 nsFrameLoader::Create(Element* aOwner, bool aNetworkCreated)

   303 {

   304   NS_ENSURE_TRUE(aOwner, nullptr);

   305   nsIDocument* doc = aOwner->OwnerDoc();

   306   NS_ENSURE_TRUE(!doc->IsResourceDoc() &&

   307                  ((!doc->IsLoadedAsData() && aOwner->GetCurrentDoc()) ||

   308                    doc->IsStaticDocument()),

   309                  nullptr);

   311   return new nsFrameLoader(aOwner, aNetworkCreated);

   312 }

   314 NS_IMETHODIMP

   315 nsFrameLoader::LoadFrame()

   316 {

   317   NS_ENSURE_TRUE(mOwnerContent, NS_ERROR_NOT_INITIALIZED);

   319   nsAutoString src;

   321   bool isSrcdoc = mOwnerContent->IsHTML(nsGkAtoms::iframe) &&

   322                   mOwnerContent->HasAttr(kNameSpaceID_None, nsGkAtoms::srcdoc);

   323   if (isSrcdoc) {

   324     src.AssignLiteral("about:srcdoc");

   325   }

   326   else {

   327     GetURL(src);

   329     src.Trim(" \t\n\r");

   331     if (src.IsEmpty()) {

   332       // If the frame is a XUL element and has the attribute 'nodefaultsrc=true'

   333       // then we will not use 'about:blank' as fallback but return early without

   334       // starting a load if no 'src' attribute is given (or it's empty).

   335       if (mOwnerContent->IsXUL() &&

   336           mOwnerContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::nodefaultsrc,

   337                                      nsGkAtoms::_true, eCaseMatters)) {

   338         return NS_OK;

   339       }

   340       src.AssignLiteral("about:blank");

   341     }

   342   }

   344   nsIDocument* doc = mOwnerContent->OwnerDoc();

   345   if (doc->IsStaticDocument()) {

   346     return NS_OK;

   347   }

   349   nsCOMPtr<nsIURI> base_uri = mOwnerContent->GetBaseURI();

   350   const nsAFlatCString &doc_charset = doc->GetDocumentCharacterSet();

   351   const char *charset = doc_charset.IsEmpty() ? nullptr : doc_charset.get();

   353   nsCOMPtr<nsIURI> uri;

   354   nsresult rv = NS_NewURI(getter_AddRefs(uri), src, charset, base_uri);

   356   // If the URI was malformed, try to recover by loading about:blank.

   357   if (rv == NS_ERROR_MALFORMED_URI) {

   358     rv = NS_NewURI(getter_AddRefs(uri), NS_LITERAL_STRING("about:blank"),

   359                    charset, base_uri);

   360   }

   362   if (NS_SUCCEEDED(rv)) {

   363     rv = LoadURI(uri);

   364   }

   366   if (NS_FAILED(rv)) {

   367     FireErrorEvent();

   369     return rv;

   370   }

   372   return NS_OK;

   373 }

   375 void

   376 nsFrameLoader::FireErrorEvent()

   377 {

   378   if (!mOwnerContent) {

   379     return;

   380   }

   381   nsRefPtr<AsyncEventDispatcher > loadBlockingAsyncDispatcher =

   382     new LoadBlockingAsyncEventDispatcher(mOwnerContent,

   383                                          NS_LITERAL_STRING("error"),

   384                                          false, false);

   385   loadBlockingAsyncDispatcher->PostDOMEvent();

   386 }

   388 NS_IMETHODIMP

   389 nsFrameLoader::LoadURI(nsIURI* aURI)

   390 {

   391   if (!aURI)

   392     return NS_ERROR_INVALID_POINTER;

   393   NS_ENSURE_STATE(!mDestroyCalled && mOwnerContent);

   395   nsCOMPtr<nsIDocument> doc = mOwnerContent->OwnerDoc();

   397   nsresult rv = CheckURILoad(aURI);

   398   NS_ENSURE_SUCCESS(rv, rv);

   400   mURIToLoad = aURI;

   401   rv = doc->InitializeFrameLoader(this);

   402   if (NS_FAILED(rv)) {

   403     mURIToLoad = nullptr;

   404   }

   405   return rv;

   406 }

   408 nsresult

   409 nsFrameLoader::ReallyStartLoading()

   410 {

   411   nsresult rv = ReallyStartLoadingInternal();

   412   if (NS_FAILED(rv)) {

   413     FireErrorEvent();

   414   }

   416   return rv;

   417 }

   419 class DelayedStartLoadingRunnable : public nsRunnable

   420 {

   421 public:

   422   DelayedStartLoadingRunnable(nsFrameLoader* aFrameLoader)

   423     : mFrameLoader(aFrameLoader)

   424   {

   425   }

   427   NS_IMETHOD Run()

   428   {

   429     // Retry the request.

   430     mFrameLoader->ReallyStartLoading();

   432     // We delayed nsFrameLoader::ReallyStartLoading() after the child process is

   433     // ready and might not be able to notify the remote browser in

   434     // UpdatePositionAndSize() when reflow finished. Retrigger reflow.

   435     nsIFrame* frame = mFrameLoader->GetPrimaryFrameOfOwningContent();

   436     if (!frame) {

   437       return NS_OK;

   438     }

   439     frame->InvalidateFrame();

   440     frame->PresContext()->PresShell()->

   441       FrameNeedsReflow(frame, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);

   443     return NS_OK;

   444   }

   446 private:

   447   nsRefPtr<nsFrameLoader> mFrameLoader;

   448 };

   450 nsresult

   451 nsFrameLoader::ReallyStartLoadingInternal()

   452 {

   453   NS_ENSURE_STATE(mURIToLoad && mOwnerContent && mOwnerContent->IsInDoc());

   455   PROFILER_LABEL("nsFrameLoader", "ReallyStartLoading");

   457   nsresult rv = MaybeCreateDocShell();

   458   if (NS_FAILED(rv)) {

   459     return rv;

   460   }

   462   if (mRemoteFrame) {

   463     if (!mRemoteBrowser) {

   464       if (!mPendingFrameSent) {

   465         nsCOMPtr<nsIObserverService> os = services::GetObserverService();

   466         if (os && !mRemoteBrowserInitialized) {

   467           os->NotifyObservers(NS_ISUPPORTS_CAST(nsIFrameLoader*, this),

   468                               "remote-browser-pending", nullptr);

   469           mPendingFrameSent = true;

   470         }

   471       }

   472       if (Preferences::GetBool("dom.ipc.processPrelaunch.enabled", false) &&

   473           !ContentParent::PreallocatedProcessReady()) {

   475         ContentParent::RunAfterPreallocatedProcessReady(

   476             new DelayedStartLoadingRunnable(this));

   477         return NS_ERROR_FAILURE;

   478       }

   480       TryRemoteBrowser();

   482       if (!mRemoteBrowser) {

   483         NS_WARNING("Couldn't create child process for iframe.");

   484         return NS_ERROR_FAILURE;

   485       }

   486     }

   488     if (mRemoteBrowserShown || ShowRemoteFrame(nsIntSize(0, 0))) {

   489       // FIXME get error codes from child

   490       mRemoteBrowser->LoadURL(mURIToLoad);

   491     } else {

   492       NS_WARNING("[nsFrameLoader] ReallyStartLoadingInternal tried but couldn't show remote browser.\n");

   493     }

   495     return NS_OK;

   496   }

   498   NS_ASSERTION(mDocShell,

   499                "MaybeCreateDocShell succeeded with a null mDocShell");

   501   // Just to be safe, recheck uri.

   502   rv = CheckURILoad(mURIToLoad);

   503   NS_ENSURE_SUCCESS(rv, rv);

   505   nsCOMPtr<nsIDocShellLoadInfo> loadInfo;

   506   mDocShell->CreateLoadInfo(getter_AddRefs(loadInfo));

   507   NS_ENSURE_TRUE(loadInfo, NS_ERROR_FAILURE);

   509   // If this frame is sandboxed with respect to origin we will set it up with

   510   // a null principal later in nsDocShell::DoURILoad.

   511   // We do it there to correctly sandbox content that was loaded into

   512   // the frame via other methods than the src attribute.

   513   // We'll use our principal, not that of the document loaded inside us.  This

   514   // is very important; needed to prevent XSS attacks on documents loaded in

   515   // subframes!

   516   loadInfo->SetOwner(mOwnerContent->NodePrincipal());

   518   nsCOMPtr<nsIURI> referrer;

   520   nsAutoString srcdoc;

   521   bool isSrcdoc = mOwnerContent->IsHTML(nsGkAtoms::iframe) &&

   522                   mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::srcdoc,

   523                                          srcdoc);

   525   if (isSrcdoc) {

   526     nsAutoString referrerStr;

   527     mOwnerContent->OwnerDoc()->GetReferrer(referrerStr);

   528     rv = NS_NewURI(getter_AddRefs(referrer), referrerStr);

   530     loadInfo->SetSrcdocData(srcdoc);

   531     nsCOMPtr<nsIURI> baseURI = mOwnerContent->GetBaseURI();

   532     loadInfo->SetBaseURI(baseURI);

   533   }

   534   else {

   535     rv = mOwnerContent->NodePrincipal()->GetURI(getter_AddRefs(referrer));

   536     NS_ENSURE_SUCCESS(rv, rv);

   537   }

   539   // Use referrer as long as it is not an nsNullPrincipalURI.

   540   // We could add a method such as GetReferrerURI to principals to make this

   541   // cleaner, but given that we need to start using Source Browsing Context for

   542   // referrer (see Bug 960639) this may be wasted effort at this stage.

   543   if (referrer) {

   544     bool isNullPrincipalScheme;

   545     rv = referrer->SchemeIs(NS_NULLPRINCIPAL_SCHEME, &isNullPrincipalScheme);

   546     if (NS_SUCCEEDED(rv) && !isNullPrincipalScheme) {

   547       loadInfo->SetReferrer(referrer);

   548     }

   549   }

   551   // Default flags:

   552   int32_t flags = nsIWebNavigation::LOAD_FLAGS_NONE;

   554   // Flags for browser frame:

   555   if (OwnerIsBrowserFrame()) {

   556     flags = nsIWebNavigation::LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP |

   557             nsIWebNavigation::LOAD_FLAGS_DISALLOW_INHERIT_OWNER;

   558   }

   560   // Kick off the load...

   561   bool tmpState = mNeedsAsyncDestroy;

   562   mNeedsAsyncDestroy = true;

   563   nsCOMPtr<nsIURI> uriToLoad = mURIToLoad;

   564   rv = mDocShell->LoadURI(uriToLoad, loadInfo, flags, false);

   565   mNeedsAsyncDestroy = tmpState;

   566   mURIToLoad = nullptr;

   567   NS_ENSURE_SUCCESS(rv, rv);

   569   return NS_OK;

   570 }

   572 nsresult

   573 nsFrameLoader::CheckURILoad(nsIURI* aURI)

   574 {

   575   // Check for security.  The fun part is trying to figure out what principals

   576   // to use.  The way I figure it, if we're doing a LoadFrame() accidentally

   577   // (eg someone created a frame/iframe node, we're being parsed, XUL iframes

   578   // are being reframed, etc.) then we definitely want to use the node

   579   // principal of mOwnerContent for security checks.  If, on the other hand,

   580   // someone's setting the src on our owner content, or created it via script,

   581   // or whatever, then they can clearly access it... and we should still use

   582   // the principal of mOwnerContent.  I don't think that leads to privilege

   583   // escalation, and it's reasonably guaranteed to not lead to XSS issues

   584   // (since caller can already access mOwnerContent in this case).  So just use

   585   // the principal of mOwnerContent no matter what.  If script wants to run

   586   // things with its own permissions, which differ from those of mOwnerContent

   587   // (which means the script is privileged in some way) it should set

   588   // window.location instead.

   589   nsIScriptSecurityManager *secMan = nsContentUtils::GetSecurityManager();

   591   // Get our principal

   592   nsIPrincipal* principal = mOwnerContent->NodePrincipal();

   594   // Check if we are allowed to load absURL

   595   nsresult rv =

   596     secMan->CheckLoadURIWithPrincipal(principal, aURI,

   597                                       nsIScriptSecurityManager::STANDARD);

   598   if (NS_FAILED(rv)) {

   599     return rv; // We're not

   600   }

   602   // Bail out if this is an infinite recursion scenario

   603   rv = MaybeCreateDocShell();

   604   if (NS_FAILED(rv)) {

   605     return rv;

   606   }

   607   if (mRemoteFrame) {

   608     return NS_OK;

   609   }

   610   return CheckForRecursiveLoad(aURI);

   611 }

   613 NS_IMETHODIMP

   614 nsFrameLoader::GetDocShell(nsIDocShell **aDocShell)

   615 {

   616   *aDocShell = nullptr;

   617   nsresult rv = NS_OK;

   619   // If we have an owner, make sure we have a docshell and return

   620   // that. If not, we're most likely in the middle of being torn down,

   621   // then we just return null.

   622   if (mOwnerContent) {

   623     nsresult rv = MaybeCreateDocShell();

   624     if (NS_FAILED(rv))

   625       return rv;

   626     if (mRemoteFrame) {

   627       NS_WARNING("No docshells for remote frames!");

   628       return rv;

   629     }

   630     NS_ASSERTION(mDocShell,

   631                  "MaybeCreateDocShell succeeded, but null mDocShell");

   632   }

   634   *aDocShell = mDocShell;

   635   NS_IF_ADDREF(*aDocShell);

   637   return rv;

   638 }

   640 void

   641 nsFrameLoader::Finalize()

   642 {

   643   nsCOMPtr<nsIBaseWindow> base_win(do_QueryInterface(mDocShell));

   644   if (base_win) {

   645     base_win->Destroy();

   646   }

   647   mDocShell = nullptr;

   648 }

   650 static void

   651 FirePageHideEvent(nsIDocShellTreeItem* aItem,

   652                   EventTarget* aChromeEventHandler)

   653 {

   654   nsCOMPtr<nsIDocument> internalDoc = do_GetInterface(aItem);

   655   NS_ASSERTION(internalDoc, "What happened here?");

   656   internalDoc->OnPageHide(true, aChromeEventHandler);

   658   int32_t childCount = 0;

   659   aItem->GetChildCount(&childCount);

   660   nsAutoTArray<nsCOMPtr<nsIDocShellTreeItem>, 8> kids;

   661   kids.AppendElements(childCount);

   662   for (int32_t i = 0; i < childCount; ++i) {

   663     aItem->GetChildAt(i, getter_AddRefs(kids[i]));

   664   }

   666   for (uint32_t i = 0; i < kids.Length(); ++i) {

   667     if (kids[i]) {

   668       FirePageHideEvent(kids[i], aChromeEventHandler);

   669     }

   670   }

   671 }

   673 // The pageshow event is fired for a given document only if IsShowing() returns

   674 // the same thing as aFireIfShowing.  This gives us a way to fire pageshow only

   675 // on documents that are still loading or only on documents that are already

   676 // loaded.

   677 static void

   678 FirePageShowEvent(nsIDocShellTreeItem* aItem,

   679                   EventTarget* aChromeEventHandler,

   680                   bool aFireIfShowing)

   681 {

   682   int32_t childCount = 0;

   683   aItem->GetChildCount(&childCount);

   684   nsAutoTArray<nsCOMPtr<nsIDocShellTreeItem>, 8> kids;

   685   kids.AppendElements(childCount);

   686   for (int32_t i = 0; i < childCount; ++i) {

   687     aItem->GetChildAt(i, getter_AddRefs(kids[i]));

   688   }

   690   for (uint32_t i = 0; i < kids.Length(); ++i) {

   691     if (kids[i]) {

   692       FirePageShowEvent(kids[i], aChromeEventHandler, aFireIfShowing);

   693     }

   694   }

   696   nsCOMPtr<nsIDocument> internalDoc = do_GetInterface(aItem);

   697   NS_ASSERTION(internalDoc, "What happened here?");

   698   if (internalDoc->IsShowing() == aFireIfShowing) {

   699     internalDoc->OnPageShow(true, aChromeEventHandler);

   700   }

   701 }

   703 static void

   704 SetTreeOwnerAndChromeEventHandlerOnDocshellTree(nsIDocShellTreeItem* aItem,

   705                                                 nsIDocShellTreeOwner* aOwner,

   706                                                 EventTarget* aHandler)

   707 {

   708   NS_PRECONDITION(aItem, "Must have item");

   710   aItem->SetTreeOwner(aOwner);

   712   int32_t childCount = 0;

   713   aItem->GetChildCount(&childCount);

   714   for (int32_t i = 0; i < childCount; ++i) {

   715     nsCOMPtr<nsIDocShellTreeItem> item;

   716     aItem->GetChildAt(i, getter_AddRefs(item));

   717     if (aHandler) {

   718       nsCOMPtr<nsIDocShell> shell(do_QueryInterface(item));

   719       shell->SetChromeEventHandler(aHandler);

   720     }

   721     SetTreeOwnerAndChromeEventHandlerOnDocshellTree(item, aOwner, aHandler);

   722   }

   723 }

   725 /**

   726  * Set the type of the treeitem and hook it up to the treeowner.

   727  * @param aItem the treeitem we're working with

   728  * @param aTreeOwner the relevant treeowner; might be null

   729  * @param aParentType the nsIDocShellTreeItem::GetType of our parent docshell

   730  * @param aParentNode if non-null, the docshell we should be added as a child to

   731  *

   732  * @return whether aItem is top-level content

   733  */

   734 bool

   735 nsFrameLoader::AddTreeItemToTreeOwner(nsIDocShellTreeItem* aItem,

   736                                       nsIDocShellTreeOwner* aOwner,

   737                                       int32_t aParentType,

   738                                       nsIDocShell* aParentNode)

   739 {

   740   NS_PRECONDITION(aItem, "Must have docshell treeitem");

   741   NS_PRECONDITION(mOwnerContent, "Must have owning content");

   743   nsAutoString value;

   744   bool isContent = false;

   745   mOwnerContent->GetAttr(kNameSpaceID_None, TypeAttrName(), value);

   747   // we accept "content" and "content-xxx" values.

   748   // at time of writing, we expect "xxx" to be "primary" or "targetable", but

   749   // someday it might be an integer expressing priority or something else.

   751   isContent = value.LowerCaseEqualsLiteral("content") ||

   752     StringBeginsWith(value, NS_LITERAL_STRING("content-"),

   753                      nsCaseInsensitiveStringComparator());

   755   // Force mozbrowser frames to always be typeContent, even if the

   756   // mozbrowser interfaces are disabled.

   757   nsCOMPtr<nsIDOMMozBrowserFrame> mozbrowser =

   758     do_QueryInterface(mOwnerContent);

   759   if (mozbrowser) {

   760     bool isMozbrowser = false;

   761     mozbrowser->GetMozbrowser(&isMozbrowser);

   762     isContent |= isMozbrowser;

   763   }

   765   if (isContent) {

   766     // The web shell's type is content.

   768     aItem->SetItemType(nsIDocShellTreeItem::typeContent);

   769   } else {

   770     // Inherit our type from our parent docshell.  If it is

   771     // chrome, we'll be chrome.  If it is content, we'll be

   772     // content.

   774     aItem->SetItemType(aParentType);

   775   }

   777   // Now that we have our type set, add ourselves to the parent, as needed.

   778   if (aParentNode) {

   779     aParentNode->AddChild(aItem);

   780   }

   782   bool retval = false;

   783   if (aParentType == nsIDocShellTreeItem::typeChrome && isContent) {

   784     retval = true;

   786     bool is_primary = value.LowerCaseEqualsLiteral("content-primary");

   788     if (aOwner) {

   789       bool is_targetable = is_primary ||

   790         value.LowerCaseEqualsLiteral("content-targetable");

   791       mOwnerContent->AddMutationObserver(this);

   792       mObservingOwnerContent = true;

   793       aOwner->ContentShellAdded(aItem, is_primary, is_targetable, value);

   794     }

   795   }

   797   return retval;

   798 }

   800 static bool

   801 AllDescendantsOfType(nsIDocShellTreeItem* aParentItem, int32_t aType)

   802 {

   803   int32_t childCount = 0;

   804   aParentItem->GetChildCount(&childCount);

   806   for (int32_t i = 0; i < childCount; ++i) {

   807     nsCOMPtr<nsIDocShellTreeItem> kid;

   808     aParentItem->GetChildAt(i, getter_AddRefs(kid));

   810     if (kid->ItemType() != aType || !AllDescendantsOfType(kid, aType)) {

   811       return false;

   812     }

   813   }

   815   return true;

   816 }

   818 /**

   819  * A class that automatically sets mInShow to false when it goes

   820  * out of scope.

   821  */

   822 class MOZ_STACK_CLASS AutoResetInShow {

   823   private:

   824     nsFrameLoader* mFrameLoader;

   825     MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER

   826   public:

   827     AutoResetInShow(nsFrameLoader* aFrameLoader MOZ_GUARD_OBJECT_NOTIFIER_PARAM)

   828       : mFrameLoader(aFrameLoader)

   829     {

   830       MOZ_GUARD_OBJECT_NOTIFIER_INIT;

   831     }

   832     ~AutoResetInShow() { mFrameLoader->mInShow = false; }

   833 };

   836 bool

   837 nsFrameLoader::Show(int32_t marginWidth, int32_t marginHeight,

   838                     int32_t scrollbarPrefX, int32_t scrollbarPrefY,

   839                     nsSubDocumentFrame* frame)

   840 {

   841   if (mInShow) {

   842     return false;

   843   }

   844   // Reset mInShow if we exit early.

   845   AutoResetInShow resetInShow(this);

   846   mInShow = true;

   848   nsresult rv = MaybeCreateDocShell();

   849   if (NS_FAILED(rv)) {

   850     return false;

   851   }

   853   if (!mRemoteFrame) {

   854     if (!mDocShell)

   855       return false;

   857     mDocShell->SetMarginWidth(marginWidth);

   858     mDocShell->SetMarginHeight(marginHeight);

   860     nsCOMPtr<nsIScrollable> sc = do_QueryInterface(mDocShell);

   861     if (sc) {

   862       sc->SetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_X,

   863                                          scrollbarPrefX);

   864       sc->SetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_Y,

   865                                          scrollbarPrefY);

   866     }

   868     nsCOMPtr<nsIPresShell> presShell = mDocShell->GetPresShell();

   869     if (presShell) {

   870       // Ensure root scroll frame is reflowed in case scroll preferences or

   871       // margins have changed

   872       nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();

   873       if (rootScrollFrame) {

   874         presShell->FrameNeedsReflow(rootScrollFrame, nsIPresShell::eResize,

   875                                     NS_FRAME_IS_DIRTY);

   876       }

   877       return true;

   878     }

   879   }

   881   nsIntSize size = frame->GetSubdocumentSize();

   882   if (mRemoteFrame) {

   883     return ShowRemoteFrame(size, frame);

   884   }

   886   nsView* view = frame->EnsureInnerView();

   887   if (!view)

   888     return false;

   890   nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(mDocShell);

   891   NS_ASSERTION(baseWindow, "Found a nsIDocShell that isn't a nsIBaseWindow.");

   892   baseWindow->InitWindow(nullptr, view->GetWidget(), 0, 0,

   893                          size.width, size.height);

   894   // This is kinda whacky, this "Create()" call doesn't really

   895   // create anything, one starts to wonder why this was named

   896   // "Create"...

   897   baseWindow->Create();

   898   baseWindow->SetVisibility(true);

   899   NS_ENSURE_TRUE(mDocShell, false);

   901   // Trigger editor re-initialization if midas is turned on in the

   902   // sub-document. This shouldn't be necessary, but given the way our

   903   // editor works, it is. See

   904   // https://bugzilla.mozilla.org/show_bug.cgi?id=284245

   905   nsCOMPtr<nsIPresShell> presShell = mDocShell->GetPresShell();

   906   if (presShell) {

   907     nsCOMPtr<nsIDOMHTMLDocument> doc =

   908       do_QueryInterface(presShell->GetDocument());

   910     if (doc) {

   911       nsAutoString designMode;

   912       doc->GetDesignMode(designMode);

   914       if (designMode.EqualsLiteral("on")) {

   915         // Hold on to the editor object to let the document reattach to the

   916         // same editor object, instead of creating a new one.

   917         nsCOMPtr<nsIEditor> editor;

   918         nsresult rv = mDocShell->GetEditor(getter_AddRefs(editor));

   919         NS_ENSURE_SUCCESS(rv, false);

   921         doc->SetDesignMode(NS_LITERAL_STRING("off"));

   922         doc->SetDesignMode(NS_LITERAL_STRING("on"));

   923       } else {

   924         // Re-initialize the presentation for contenteditable documents

   925         bool editable = false,

   926              hasEditingSession = false;

   927         mDocShell->GetEditable(&editable);

   928         mDocShell->GetHasEditingSession(&hasEditingSession);

   929         nsCOMPtr<nsIEditor> editor;

   930         mDocShell->GetEditor(getter_AddRefs(editor));

   931         if (editable && hasEditingSession && editor) {

   932           editor->PostCreate();

   933         }

   934       }

   935     }

   936   }

   938   mInShow = false;

   939   if (mHideCalled) {

   940     mHideCalled = false;

   941     Hide();

   942     return false;

   943   }

   944   return true;

   945 }

   947 void

   948 nsFrameLoader::MarginsChanged(uint32_t aMarginWidth,

   949                               uint32_t aMarginHeight)

   950 {

   951   // We assume that the margins are always zero for remote frames.

   952   if (mRemoteFrame)

   953     return;

   955   // If there's no docshell, we're probably not up and running yet.

   956   // nsFrameLoader::Show() will take care of setting the right

   957   // margins.

   958   if (!mDocShell)

   959     return;

   961   // Set the margins

   962   mDocShell->SetMarginWidth(aMarginWidth);

   963   mDocShell->SetMarginHeight(aMarginHeight);

   965   // Trigger a restyle if there's a prescontext

   966   nsRefPtr<nsPresContext> presContext;

   967   mDocShell->GetPresContext(getter_AddRefs(presContext));

   968   if (presContext)

   969     presContext->RebuildAllStyleData(nsChangeHint(0));

   970 }

   972 bool

   973 nsFrameLoader::ShowRemoteFrame(const nsIntSize& size,

   974                                nsSubDocumentFrame *aFrame)

   975 {

   976   NS_ASSERTION(mRemoteFrame, "ShowRemote only makes sense on remote frames.");

   978   if (!mRemoteBrowser) {

   979     TryRemoteBrowser();

   981     if (!mRemoteBrowser) {

   982       NS_ERROR("Couldn't create child process.");

   983       return false;

   984     }

   985   }

   987   // FIXME/bug 589337: Show()/Hide() is pretty expensive for

   988   // cross-process layers; need to figure out what behavior we really

   989   // want here.  For now, hack.

   990   if (!mRemoteBrowserShown) {

   991     if (!mOwnerContent ||

   992         !mOwnerContent->GetCurrentDoc()) {

   993       return false;

   994     }

   996     nsRefPtr<layers::LayerManager> layerManager =

   997       nsContentUtils::LayerManagerForDocument(mOwnerContent->GetCurrentDoc());

   998     if (!layerManager) {

   999       // This is just not going to work.

  1000       return false;

  1001     }

  1003     mRemoteBrowser->Show(size);

  1004     mRemoteBrowserShown = true;

  1006     EnsureMessageManager();

  1008     nsCOMPtr<nsIObserverService> os = services::GetObserverService();

  1009     if (os && !mRemoteBrowserInitialized) {

  1010       if (!mPendingFrameSent) {

  1011         os->NotifyObservers(NS_ISUPPORTS_CAST(nsIFrameLoader*, this),

  1012                             "remote-browser-pending", nullptr);

  1013         mPendingFrameSent = true;

  1014       }

  1015       os->NotifyObservers(NS_ISUPPORTS_CAST(nsIFrameLoader*, this),

  1016                           "remote-browser-shown", nullptr);

  1017       mRemoteBrowserInitialized = true;

  1018     }

  1019   } else {

  1020     nsRect dimensions;

  1021     NS_ENSURE_SUCCESS(GetWindowDimensions(dimensions), false);

  1023     // Don't show remote iframe if we are waiting for the completion of reflow.

  1024     if (!aFrame || !(aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {

  1025       mRemoteBrowser->UpdateDimensions(dimensions, size);

  1026     }

  1027   }

  1029   return true;

  1030 }

  1032 void

  1033 nsFrameLoader::Hide()

  1034 {

  1035   if (mHideCalled) {

  1036     return;

  1037   }

  1038   if (mInShow) {

  1039     mHideCalled = true;

  1040     return;

  1041   }

  1043   if (!mDocShell)

  1044     return;

  1046   nsCOMPtr<nsIContentViewer> contentViewer;

  1047   mDocShell->GetContentViewer(getter_AddRefs(contentViewer));

  1048   if (contentViewer)

  1049     contentViewer->SetSticky(false);

  1051   nsCOMPtr<nsIBaseWindow> baseWin = do_QueryInterface(mDocShell);

  1052   NS_ASSERTION(baseWin,

  1053                "Found an nsIDocShell which doesn't implement nsIBaseWindow.");

  1054   baseWin->SetVisibility(false);

  1055   baseWin->SetParentWidget(nullptr);

  1056 }

  1058 nsresult

  1059 nsFrameLoader::SwapWithOtherLoader(nsFrameLoader* aOther,

  1060                                    nsRefPtr<nsFrameLoader>& aFirstToSwap,

  1061                                    nsRefPtr<nsFrameLoader>& aSecondToSwap)

  1062 {

  1063   NS_PRECONDITION((aFirstToSwap == this && aSecondToSwap == aOther) ||

  1064                   (aFirstToSwap == aOther && aSecondToSwap == this),

  1065                   "Swapping some sort of random loaders?");

  1066   NS_ENSURE_STATE(!mInShow && !aOther->mInShow);

  1068   Element* ourContent = mOwnerContent;

  1069   Element* otherContent = aOther->mOwnerContent;

  1071   if (!ourContent || !otherContent) {

  1072     // Can't handle this

  1073     return NS_ERROR_NOT_IMPLEMENTED;

  1074   }

  1076   // Make sure there are no same-origin issues

  1077   bool equal;

  1078   nsresult rv =

  1079     ourContent->NodePrincipal()->Equals(otherContent->NodePrincipal(), &equal);

  1080   if (NS_FAILED(rv) || !equal) {

  1081     // Security problems loom.  Just bail on it all

  1082     return NS_ERROR_DOM_SECURITY_ERR;

  1083   }

  1085   nsCOMPtr<nsIDocShell> ourDocshell = GetExistingDocShell();

  1086   nsCOMPtr<nsIDocShell> otherDocshell = aOther->GetExistingDocShell();

  1087   if (!ourDocshell || !otherDocshell) {

  1088     // How odd

  1089     return NS_ERROR_NOT_IMPLEMENTED;

  1090   }

  1092   // To avoid having to mess with session history, avoid swapping

  1093   // frameloaders that don't correspond to root same-type docshells,

  1094   // unless both roots have session history disabled.

  1095   nsCOMPtr<nsIDocShellTreeItem> ourRootTreeItem, otherRootTreeItem;

  1096   ourDocshell->GetSameTypeRootTreeItem(getter_AddRefs(ourRootTreeItem));

  1097   otherDocshell->GetSameTypeRootTreeItem(getter_AddRefs(otherRootTreeItem));

  1098   nsCOMPtr<nsIWebNavigation> ourRootWebnav =

  1099     do_QueryInterface(ourRootTreeItem);

  1100   nsCOMPtr<nsIWebNavigation> otherRootWebnav =

  1101     do_QueryInterface(otherRootTreeItem);

  1103   if (!ourRootWebnav || !otherRootWebnav) {

  1104     return NS_ERROR_NOT_IMPLEMENTED;

  1105   }

  1107   nsCOMPtr<nsISHistory> ourHistory;

  1108   nsCOMPtr<nsISHistory> otherHistory;

  1109   ourRootWebnav->GetSessionHistory(getter_AddRefs(ourHistory));

  1110   otherRootWebnav->GetSessionHistory(getter_AddRefs(otherHistory));

  1112   if ((ourRootTreeItem != ourDocshell || otherRootTreeItem != otherDocshell) &&

  1113       (ourHistory || otherHistory)) {

  1114     return NS_ERROR_NOT_IMPLEMENTED;

  1115   }

  1117   // Also make sure that the two docshells are the same type. Otherwise

  1118   // swapping is certainly not safe. If this needs to be changed then

  1119   // the code below needs to be audited as it assumes identical types.

  1120   int32_t ourType = ourDocshell->ItemType();

  1121   int32_t otherType = otherDocshell->ItemType();

  1122   if (ourType != otherType) {

  1123     return NS_ERROR_NOT_IMPLEMENTED;

  1124   }

  1126   // One more twist here.  Setting up the right treeowners in a heterogeneous

  1127   // tree is a bit of a pain.  So make sure that if ourType is not

  1128   // nsIDocShellTreeItem::typeContent then all of our descendants are the same

  1129   // type as us.

  1130   if (ourType != nsIDocShellTreeItem::typeContent &&

  1131       (!AllDescendantsOfType(ourDocshell, ourType) ||

  1132        !AllDescendantsOfType(otherDocshell, otherType))) {

  1133     return NS_ERROR_NOT_IMPLEMENTED;

  1134   }

  1136   // Save off the tree owners, frame elements, chrome event handlers, and

  1137   // docshell and document parents before doing anything else.

  1138   nsCOMPtr<nsIDocShellTreeOwner> ourOwner, otherOwner;

  1139   ourDocshell->GetTreeOwner(getter_AddRefs(ourOwner));

  1140   otherDocshell->GetTreeOwner(getter_AddRefs(otherOwner));

  1141   // Note: it's OK to have null treeowners.

  1143   nsCOMPtr<nsIDocShellTreeItem> ourParentItem, otherParentItem;

  1144   ourDocshell->GetParent(getter_AddRefs(ourParentItem));

  1145   otherDocshell->GetParent(getter_AddRefs(otherParentItem));

  1146   if (!ourParentItem || !otherParentItem) {

  1147     return NS_ERROR_NOT_IMPLEMENTED;

  1148   }

  1150   // Make sure our parents are the same type too

  1151   int32_t ourParentType = ourParentItem->ItemType();

  1152   int32_t otherParentType = otherParentItem->ItemType();

  1153   if (ourParentType != otherParentType) {

  1154     return NS_ERROR_NOT_IMPLEMENTED;

  1155   }

  1157   nsCOMPtr<nsPIDOMWindow> ourWindow = do_GetInterface(ourDocshell);

  1158   nsCOMPtr<nsPIDOMWindow> otherWindow = do_GetInterface(otherDocshell);

  1160   nsCOMPtr<Element> ourFrameElement =

  1161     ourWindow->GetFrameElementInternal();

  1162   nsCOMPtr<Element> otherFrameElement =

  1163     otherWindow->GetFrameElementInternal();

  1165   nsCOMPtr<EventTarget> ourChromeEventHandler =

  1166     do_QueryInterface(ourWindow->GetChromeEventHandler());

  1167   nsCOMPtr<EventTarget> otherChromeEventHandler =

  1168     do_QueryInterface(otherWindow->GetChromeEventHandler());

  1170   NS_ASSERTION(SameCOMIdentity(ourFrameElement, ourContent) &&

  1171                SameCOMIdentity(otherFrameElement, otherContent) &&

  1172                SameCOMIdentity(ourChromeEventHandler, ourContent) &&

  1173                SameCOMIdentity(otherChromeEventHandler, otherContent),

  1174                "How did that happen, exactly?");

  1176   nsCOMPtr<nsIDocument> ourChildDocument = ourWindow->GetExtantDoc();

  1177   nsCOMPtr<nsIDocument> otherChildDocument = otherWindow ->GetExtantDoc();

  1178   if (!ourChildDocument || !otherChildDocument) {

  1179     // This shouldn't be happening

  1180     return NS_ERROR_NOT_IMPLEMENTED;

  1181   }

  1183   nsCOMPtr<nsIDocument> ourParentDocument =

  1184     ourChildDocument->GetParentDocument();

  1185   nsCOMPtr<nsIDocument> otherParentDocument =

  1186     otherChildDocument->GetParentDocument();

  1188   // Make sure to swap docshells between the two frames.

  1189   nsIDocument* ourDoc = ourContent->GetCurrentDoc();

  1190   nsIDocument* otherDoc = otherContent->GetCurrentDoc();

  1191   if (!ourDoc || !otherDoc) {

  1192     // Again, how odd, given that we had docshells

  1193     return NS_ERROR_NOT_IMPLEMENTED;

  1194   }

  1196   NS_ASSERTION(ourDoc == ourParentDocument, "Unexpected parent document");

  1197   NS_ASSERTION(otherDoc == otherParentDocument, "Unexpected parent document");

  1199   nsIPresShell* ourShell = ourDoc->GetShell();

  1200   nsIPresShell* otherShell = otherDoc->GetShell();

  1201   if (!ourShell || !otherShell) {

  1202     return NS_ERROR_NOT_IMPLEMENTED;

  1203   }

  1205   if (ourDocshell->GetIsBrowserElement() !=

  1206       otherDocshell->GetIsBrowserElement() ||

  1207       ourDocshell->GetIsApp() != otherDocshell->GetIsApp()) {

  1208       return NS_ERROR_NOT_IMPLEMENTED;

  1209   }

  1211   if (mInSwap || aOther->mInSwap) {

  1212     return NS_ERROR_NOT_IMPLEMENTED;

  1213   }

  1214   mInSwap = aOther->mInSwap = true;

  1216   // Fire pageshow events on still-loading pages, and then fire pagehide

  1217   // events.  Note that we do NOT fire these in the normal way, but just fire

  1218   // them on the chrome event handlers.

  1219   FirePageShowEvent(ourDocshell, ourChromeEventHandler, false);

  1220   FirePageShowEvent(otherDocshell, otherChromeEventHandler, false);

  1221   FirePageHideEvent(ourDocshell, ourChromeEventHandler);

  1222   FirePageHideEvent(otherDocshell, otherChromeEventHandler);

  1224   nsIFrame* ourFrame = ourContent->GetPrimaryFrame();

  1225   nsIFrame* otherFrame = otherContent->GetPrimaryFrame();

  1226   if (!ourFrame || !otherFrame) {

  1227     mInSwap = aOther->mInSwap = false;

  1228     FirePageShowEvent(ourDocshell, ourChromeEventHandler, true);

  1229     FirePageShowEvent(otherDocshell, otherChromeEventHandler, true);

  1230     return NS_ERROR_NOT_IMPLEMENTED;

  1231   }

  1233   nsSubDocumentFrame* ourFrameFrame = do_QueryFrame(ourFrame);

  1234   if (!ourFrameFrame) {

  1235     mInSwap = aOther->mInSwap = false;

  1236     FirePageShowEvent(ourDocshell, ourChromeEventHandler, true);

  1237     FirePageShowEvent(otherDocshell, otherChromeEventHandler, true);

  1238     return NS_ERROR_NOT_IMPLEMENTED;

  1239   }

  1241   // OK.  First begin to swap the docshells in the two nsIFrames

  1242   rv = ourFrameFrame->BeginSwapDocShells(otherFrame);

  1243   if (NS_FAILED(rv)) {

  1244     mInSwap = aOther->mInSwap = false;

  1245     FirePageShowEvent(ourDocshell, ourChromeEventHandler, true);

  1246     FirePageShowEvent(otherDocshell, otherChromeEventHandler, true);

  1247     return rv;

  1248   }

  1250   // Now move the docshells to the right docshell trees.  Note that this

  1251   // resets their treeowners to null.

  1252   ourParentItem->RemoveChild(ourDocshell);

  1253   otherParentItem->RemoveChild(otherDocshell);

  1254   if (ourType == nsIDocShellTreeItem::typeContent) {

  1255     ourOwner->ContentShellRemoved(ourDocshell);

  1256     otherOwner->ContentShellRemoved(otherDocshell);

  1257   }

  1259   ourParentItem->AddChild(otherDocshell);

  1260   otherParentItem->AddChild(ourDocshell);

  1262   // Restore the correct chrome event handlers.

  1263   ourDocshell->SetChromeEventHandler(otherChromeEventHandler);

  1264   otherDocshell->SetChromeEventHandler(ourChromeEventHandler);

  1265   // Restore the correct treeowners

  1266   // (and also chrome event handlers for content frames only).

  1267   SetTreeOwnerAndChromeEventHandlerOnDocshellTree(ourDocshell, otherOwner,

  1268     ourType == nsIDocShellTreeItem::typeContent ? otherChromeEventHandler : nullptr);

  1269   SetTreeOwnerAndChromeEventHandlerOnDocshellTree(otherDocshell, ourOwner,

  1270     ourType == nsIDocShellTreeItem::typeContent ? ourChromeEventHandler : nullptr);

  1272   // Switch the owner content before we start calling AddTreeItemToTreeOwner.

  1273   // Note that we rely on this to deal with setting mObservingOwnerContent to

  1274   // false and calling RemoveMutationObserver as needed.

  1275   SetOwnerContent(otherContent);

  1276   aOther->SetOwnerContent(ourContent);

  1278   AddTreeItemToTreeOwner(ourDocshell, otherOwner, otherParentType, nullptr);

  1279   aOther->AddTreeItemToTreeOwner(otherDocshell, ourOwner, ourParentType,

  1280                                  nullptr);

  1282   // SetSubDocumentFor nulls out parent documents on the old child doc if a

  1283   // new non-null document is passed in, so just go ahead and remove both

  1284   // kids before reinserting in the parent subdoc maps, to avoid

  1285   // complications.

  1286   ourParentDocument->SetSubDocumentFor(ourContent, nullptr);

  1287   otherParentDocument->SetSubDocumentFor(otherContent, nullptr);

  1288   ourParentDocument->SetSubDocumentFor(ourContent, otherChildDocument);

  1289   otherParentDocument->SetSubDocumentFor(otherContent, ourChildDocument);

  1291   ourWindow->SetFrameElementInternal(otherFrameElement);

  1292   otherWindow->SetFrameElementInternal(ourFrameElement);

  1294   nsRefPtr<nsFrameMessageManager> ourMessageManager = mMessageManager;

  1295   nsRefPtr<nsFrameMessageManager> otherMessageManager = aOther->mMessageManager;

  1296   // Swap pointers in child message managers.

  1297   if (mChildMessageManager) {

  1298     nsInProcessTabChildGlobal* tabChild =

  1299       static_cast<nsInProcessTabChildGlobal*>(mChildMessageManager.get());

  1300     tabChild->SetOwner(otherContent);

  1301     tabChild->SetChromeMessageManager(otherMessageManager);

  1302   }

  1303   if (aOther->mChildMessageManager) {

  1304     nsInProcessTabChildGlobal* otherTabChild =

  1305       static_cast<nsInProcessTabChildGlobal*>(aOther->mChildMessageManager.get());

  1306     otherTabChild->SetOwner(ourContent);

  1307     otherTabChild->SetChromeMessageManager(ourMessageManager);

  1308   }

  1309   // Swap and setup things in parent message managers.

  1310   if (mMessageManager) {

  1311     mMessageManager->SetCallback(aOther);

  1312   }

  1313   if (aOther->mMessageManager) {

  1314     aOther->mMessageManager->SetCallback(this);

  1315   }

  1316   mMessageManager.swap(aOther->mMessageManager);

  1318   aFirstToSwap.swap(aSecondToSwap);

  1320   // Drop any cached content viewers in the two session histories.

  1321   nsCOMPtr<nsISHistoryInternal> ourInternalHistory =

  1322     do_QueryInterface(ourHistory);

  1323   nsCOMPtr<nsISHistoryInternal> otherInternalHistory =

  1324     do_QueryInterface(otherHistory);

  1325   if (ourInternalHistory) {

  1326     ourInternalHistory->EvictAllContentViewers();

  1327   }

  1328   if (otherInternalHistory) {

  1329     otherInternalHistory->EvictAllContentViewers();

  1330   }

  1332   NS_ASSERTION(ourFrame == ourContent->GetPrimaryFrame() &&

  1333                otherFrame == otherContent->GetPrimaryFrame(),

  1334                "changed primary frame");

  1336   ourFrameFrame->EndSwapDocShells(otherFrame);

  1338   // If the content being swapped came from windows on two screens with

  1339   // incompatible backing resolution (e.g. dragging a tab between windows on

  1340   // hi-dpi and low-dpi screens), it will have style data that is based on

  1341   // the wrong appUnitsPerDevPixel value. So we tell the PresShells that their

  1342   // backing scale factor may have changed. (Bug 822266)

  1343   ourShell->BackingScaleFactorChanged();

  1344   otherShell->BackingScaleFactorChanged();

  1346   ourParentDocument->FlushPendingNotifications(Flush_Layout);

  1347   otherParentDocument->FlushPendingNotifications(Flush_Layout);

  1349   FirePageShowEvent(ourDocshell, otherChromeEventHandler, true);

  1350   FirePageShowEvent(otherDocshell, ourChromeEventHandler, true);

  1352   mInSwap = aOther->mInSwap = false;

  1353   return NS_OK;

  1354 }

  1356 void

  1357 nsFrameLoader::DestroyChild()

  1358 {

  1359   if (mRemoteBrowser) {

  1360     mRemoteBrowser->SetOwnerElement(nullptr);

  1361     mRemoteBrowser->Destroy();

  1362     mRemoteBrowser = nullptr;

  1363   }

  1364 }

  1366 NS_IMETHODIMP

  1367 nsFrameLoader::Destroy()

  1368 {

  1369   if (mDestroyCalled) {

  1370     return NS_OK;

  1371   }

  1372   mDestroyCalled = true;

  1374   if (mMessageManager) {

  1375     mMessageManager->Disconnect();

  1376   }

  1377   if (mChildMessageManager) {

  1378     static_cast<nsInProcessTabChildGlobal*>(mChildMessageManager.get())->Disconnect();

  1379   }

  1381   nsCOMPtr<nsIDocument> doc;

  1382   bool dynamicSubframeRemoval = false;

  1383   if (mOwnerContent) {

  1384     doc = mOwnerContent->OwnerDoc();

  1385     dynamicSubframeRemoval = !mIsTopLevelContent && !doc->InUnlinkOrDeletion();

  1386     doc->SetSubDocumentFor(mOwnerContent, nullptr);

  1388     SetOwnerContent(nullptr);

  1389   }

  1390   DestroyChild();

  1392   // Seems like this is a dynamic frame removal.

  1393   if (dynamicSubframeRemoval) {

  1394     if (mDocShell) {

  1395       mDocShell->RemoveFromSessionHistory();

  1396     }

  1397   }

  1399   // Let the tree owner know we're gone.

  1400   if (mIsTopLevelContent) {

  1401     if (mDocShell) {

  1402       nsCOMPtr<nsIDocShellTreeItem> parentItem;

  1403       mDocShell->GetParent(getter_AddRefs(parentItem));

  1404       nsCOMPtr<nsIDocShellTreeOwner> owner = do_GetInterface(parentItem);

  1405       if (owner) {

  1406         owner->ContentShellRemoved(mDocShell);

  1407       }

  1408     }

  1409   }

  1411   // Let our window know that we are gone

  1412   nsCOMPtr<nsPIDOMWindow> win_private(do_GetInterface(mDocShell));

  1413   if (win_private) {

  1414     win_private->SetFrameElementInternal(nullptr);

  1415   }

  1417   if ((mNeedsAsyncDestroy || !doc ||

  1418        NS_FAILED(doc->FinalizeFrameLoader(this))) && mDocShell) {

  1419     nsCOMPtr<nsIRunnable> event = new nsAsyncDocShellDestroyer(mDocShell);

  1420     NS_ENSURE_TRUE(event, NS_ERROR_OUT_OF_MEMORY);

  1421     NS_DispatchToCurrentThread(event);

  1423     // Let go of our docshell now that the async destroyer holds on to

  1424     // the docshell.

  1426     mDocShell = nullptr;

  1427   }

  1429   // NOTE: 'this' may very well be gone by now.

  1431   return NS_OK;

  1432 }

  1434 NS_IMETHODIMP

  1435 nsFrameLoader::GetDepthTooGreat(bool* aDepthTooGreat)

  1436 {

  1437   *aDepthTooGreat = mDepthTooGreat;

  1438   return NS_OK;

  1439 }

  1441 void

  1442 nsFrameLoader::SetOwnerContent(Element* aContent)

  1443 {

  1444   if (mObservingOwnerContent) {

  1445     mObservingOwnerContent = false;

  1446     mOwnerContent->RemoveMutationObserver(this);

  1447   }

  1448   mOwnerContent = aContent;

  1449   if (RenderFrameParent* rfp = GetCurrentRemoteFrame()) {

  1450     rfp->OwnerContentChanged(aContent);

  1451   }

  1453   ResetPermissionManagerStatus();

  1454 }

  1456 bool

  1457 nsFrameLoader::OwnerIsBrowserOrAppFrame()

  1458 {

  1459   nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwnerContent);

  1460   return browserFrame ? browserFrame->GetReallyIsBrowserOrApp() : false;

  1461 }

  1463 // The xpcom getter version

  1464 NS_IMETHODIMP

  1465 nsFrameLoader::GetOwnerIsBrowserOrAppFrame(bool* aResult)

  1466 {

  1467   *aResult = OwnerIsBrowserOrAppFrame();

  1468   return NS_OK;

  1469 }

  1471 bool

  1472 nsFrameLoader::OwnerIsAppFrame()

  1473 {

  1474   nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwnerContent);

  1475   return browserFrame ? browserFrame->GetReallyIsApp() : false;

  1476 }

  1478 bool

  1479 nsFrameLoader::OwnerIsBrowserFrame()

  1480 {

  1481   return OwnerIsBrowserOrAppFrame() && !OwnerIsAppFrame();

  1482 }

  1484 void

  1485 nsFrameLoader::GetOwnerAppManifestURL(nsAString& aOut)

  1486 {

  1487   aOut.Truncate();

  1488   nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwnerContent);

  1489   if (browserFrame) {

  1490     browserFrame->GetAppManifestURL(aOut);

  1491   }

  1492 }

  1494 already_AddRefed<mozIApplication>

  1495 nsFrameLoader::GetOwnApp()

  1496 {

  1497   nsAutoString manifest;

  1498   GetOwnerAppManifestURL(manifest);

  1499   if (manifest.IsEmpty()) {

  1500     return nullptr;

  1501   }

  1503   nsCOMPtr<nsIAppsService> appsService = do_GetService(APPS_SERVICE_CONTRACTID);

  1504   NS_ENSURE_TRUE(appsService, nullptr);

  1506   nsCOMPtr<mozIApplication> app;

  1507   appsService->GetAppByManifestURL(manifest, getter_AddRefs(app));

  1509   return app.forget();

  1510 }

  1512 already_AddRefed<mozIApplication>

  1513 nsFrameLoader::GetContainingApp()

  1514 {

  1515   // See if our owner content's principal has an associated app.

  1516   uint32_t appId = mOwnerContent->NodePrincipal()->GetAppId();

  1517   MOZ_ASSERT(appId != nsIScriptSecurityManager::UNKNOWN_APP_ID);

  1519   if (appId == nsIScriptSecurityManager::NO_APP_ID ||

  1520       appId == nsIScriptSecurityManager::UNKNOWN_APP_ID) {

  1521     return nullptr;

  1522   }

  1524   nsCOMPtr<nsIAppsService> appsService = do_GetService(APPS_SERVICE_CONTRACTID);

  1525   NS_ENSURE_TRUE(appsService, nullptr);

  1527   nsCOMPtr<mozIApplication> app;

  1528   appsService->GetAppByLocalId(appId, getter_AddRefs(app));

  1530   return app.forget();

  1531 }

  1533 bool

  1534 nsFrameLoader::ShouldUseRemoteProcess()

  1535 {

  1536   if (PR_GetEnv("MOZ_DISABLE_OOP_TABS") ||

  1537       Preferences::GetBool("dom.ipc.tabs.disabled", false)) {

  1538     return false;

  1539   }

  1541   // If we're inside a content process, don't use a remote process for this

  1542   // frame; it won't work properly until bug 761935 is fixed.

  1543   if (XRE_GetProcessType() == GeckoProcessType_Content) {

  1544     return false;

  1545   }

  1547   // If we're an <iframe mozbrowser> and we don't have a "remote" attribute,

  1548   // fall back to the default.

  1549   if (OwnerIsBrowserOrAppFrame() &&

  1550       !mOwnerContent->HasAttr(kNameSpaceID_None, nsGkAtoms::Remote)) {

  1552     return Preferences::GetBool("dom.ipc.browser_frames.oop_by_default", false);

  1553   }

  1555   // Otherwise, we're remote if we have "remote=true" and we're either a

  1556   // browser frame or a XUL element.

  1557   return (OwnerIsBrowserOrAppFrame() ||

  1558           mOwnerContent->GetNameSpaceID() == kNameSpaceID_XUL) &&

  1559          mOwnerContent->AttrValueIs(kNameSpaceID_None,

  1560                                     nsGkAtoms::Remote,

  1561                                     nsGkAtoms::_true,

  1562                                     eCaseMatters);

  1563 }

  1565 nsresult

  1566 nsFrameLoader::MaybeCreateDocShell()

  1567 {

  1568   if (mDocShell) {

  1569     return NS_OK;

  1570   }

  1571   if (mRemoteFrame) {

  1572     return NS_OK;

  1573   }

  1574   NS_ENSURE_STATE(!mDestroyCalled);

  1576   if (ShouldUseRemoteProcess()) {

  1577     mRemoteFrame = true;

  1578     return NS_OK;

  1579   }

  1581   // Get our parent docshell off the document of mOwnerContent

  1582   // XXXbz this is such a total hack.... We really need to have a

  1583   // better setup for doing this.

  1584   nsIDocument* doc = mOwnerContent->OwnerDoc();

  1585   if (!(doc->IsStaticDocument() || mOwnerContent->IsInDoc())) {

  1586     return NS_ERROR_UNEXPECTED;

  1587   }

  1589   if (doc->IsResourceDoc() || !doc->IsActive()) {

  1590     // Don't allow subframe loads in resource documents, nor

  1591     // in non-active documents.

  1592     return NS_ERROR_NOT_AVAILABLE;

  1593   }

  1595   nsCOMPtr<nsIDocShell> docShell = doc->GetDocShell();

  1596   nsCOMPtr<nsIWebNavigation> parentAsWebNav = do_QueryInterface(docShell);

  1597   NS_ENSURE_STATE(parentAsWebNav);

  1599   // Create the docshell...

  1600   mDocShell = do_CreateInstance("@mozilla.org/docshell;1");

  1601   NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);

  1603   // Apply sandbox flags even if our owner is not an iframe, as this copies

  1604   // flags from our owning content's owning document.

  1605   uint32_t sandboxFlags = 0;

  1606   HTMLIFrameElement* iframe = HTMLIFrameElement::FromContent(mOwnerContent);

  1607   if (iframe) {

  1608     sandboxFlags = iframe->GetSandboxFlags();

  1609   }

  1610   ApplySandboxFlags(sandboxFlags);

  1612   if (!mNetworkCreated) {

  1613     if (mDocShell) {

  1614       mDocShell->SetCreatedDynamically(true);

  1615     }

  1616   }

  1618   // Get the frame name and tell the docshell about it.

  1619   NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);

  1620   nsAutoString frameName;

  1622   int32_t namespaceID = mOwnerContent->GetNameSpaceID();

  1623   if (namespaceID == kNameSpaceID_XHTML && !mOwnerContent->IsInHTMLDocument()) {

  1624     mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, frameName);

  1625   } else {

  1626     mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::name, frameName);

  1627     // XXX if no NAME then use ID, after a transition period this will be

  1628     // changed so that XUL only uses ID too (bug 254284).

  1629     if (frameName.IsEmpty() && namespaceID == kNameSpaceID_XUL) {

  1630       mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, frameName);

  1631     }

  1632   }

  1634   if (!frameName.IsEmpty()) {

  1635     mDocShell->SetName(frameName);

  1636   }

  1638   // Inform our docShell that it has a new child.

  1639   // Note: This logic duplicates a lot of logic in

  1640   // nsSubDocumentFrame::AttributeChanged.  We should fix that.

  1642   int32_t parentType = docShell->ItemType();

  1644   // XXXbz why is this in content code, exactly?  We should handle

  1645   // this some other way.....  Not sure how yet.

  1646   nsCOMPtr<nsIDocShellTreeOwner> parentTreeOwner;

  1647   docShell->GetTreeOwner(getter_AddRefs(parentTreeOwner));

  1648   NS_ENSURE_STATE(parentTreeOwner);

  1649   mIsTopLevelContent =

  1650     AddTreeItemToTreeOwner(mDocShell, parentTreeOwner, parentType, docShell);

  1652   // Make sure all shells have links back to the content element

  1653   // in the nearest enclosing chrome shell.

  1654   nsCOMPtr<nsIDOMEventTarget> chromeEventHandler;

  1656   if (parentType == nsIDocShellTreeItem::typeChrome) {

  1657     // Our parent shell is a chrome shell. It is therefore our nearest

  1658     // enclosing chrome shell.

  1660     chromeEventHandler = do_QueryInterface(mOwnerContent);

  1661     NS_ASSERTION(chromeEventHandler,

  1662                  "This mContent should implement this.");

  1663   } else {

  1664     // Our parent shell is a content shell. Get the chrome event

  1665     // handler from it and use that for our shell as well.

  1667     docShell->GetChromeEventHandler(getter_AddRefs(chromeEventHandler));

  1668   }

  1670   mDocShell->SetChromeEventHandler(chromeEventHandler);

  1672   // This is nasty, this code (the do_GetInterface(mDocShell) below)

  1673   // *must* come *after* the above call to

  1674   // mDocShell->SetChromeEventHandler() for the global window to get

  1675   // the right chrome event handler.

  1677   // Tell the window about the frame that hosts it.

  1678   nsCOMPtr<Element> frame_element = mOwnerContent;

  1679   NS_ASSERTION(frame_element, "frame loader owner element not a DOM element!");

  1681   nsCOMPtr<nsPIDOMWindow> win_private(do_GetInterface(mDocShell));

  1682   nsCOMPtr<nsIBaseWindow> base_win(do_QueryInterface(mDocShell));

  1683   if (win_private) {

  1684     win_private->SetFrameElementInternal(frame_element);

  1685   }

  1687   // This is kinda whacky, this call doesn't really create anything,

  1688   // but it must be called to make sure things are properly

  1689   // initialized.

  1690   if (NS_FAILED(base_win->Create()) || !win_private) {

  1691     // Do not call Destroy() here. See bug 472312.

  1692     NS_WARNING("Something wrong when creating the docshell for a frameloader!");

  1693     return NS_ERROR_FAILURE;

  1694   }

  1696   if (mIsTopLevelContent &&

  1697       mOwnerContent->IsXUL(nsGkAtoms::browser) &&

  1698       !mOwnerContent->HasAttr(kNameSpaceID_None, nsGkAtoms::disablehistory)) {

  1699     nsresult rv;

  1700     nsCOMPtr<nsISHistory> sessionHistory =

  1701       do_CreateInstance(NS_SHISTORY_CONTRACTID, &rv);

  1702     NS_ENSURE_SUCCESS(rv, rv);

  1704     nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(mDocShell));

  1705     webNav->SetSessionHistory(sessionHistory);

  1706   }

  1708   EnsureMessageManager();

  1710   if (OwnerIsAppFrame()) {

  1711     // You can't be both an app and a browser frame.

  1712     MOZ_ASSERT(!OwnerIsBrowserFrame());

  1714     nsCOMPtr<mozIApplication> ownApp = GetOwnApp();

  1715     MOZ_ASSERT(ownApp);

  1716     uint32_t ownAppId = nsIScriptSecurityManager::NO_APP_ID;

  1717     if (ownApp) {

  1718       NS_ENSURE_SUCCESS(ownApp->GetLocalId(&ownAppId), NS_ERROR_FAILURE);

  1719     }

  1721     mDocShell->SetIsApp(ownAppId);

  1722   }

  1724   if (OwnerIsBrowserFrame()) {

  1725     // You can't be both a browser and an app frame.

  1726     MOZ_ASSERT(!OwnerIsAppFrame());

  1728     nsCOMPtr<mozIApplication> containingApp = GetContainingApp();

  1729     uint32_t containingAppId = nsIScriptSecurityManager::NO_APP_ID;

  1730     if (containingApp) {

  1731       NS_ENSURE_SUCCESS(containingApp->GetLocalId(&containingAppId),

  1732                         NS_ERROR_FAILURE);

  1733     }

  1734     mDocShell->SetIsBrowserInsideApp(containingAppId);

  1735   }

  1737   nsCOMPtr<nsIObserverService> os = services::GetObserverService();

  1738   if (os) {

  1739     os->NotifyObservers(NS_ISUPPORTS_CAST(nsIFrameLoader*, this),

  1740                         "inprocess-browser-shown", nullptr);

  1741   }

  1743   if (OwnerIsBrowserOrAppFrame() && mMessageManager) {

  1744     mMessageManager->LoadFrameScript(

  1745       NS_LITERAL_STRING("chrome://global/content/BrowserElementChild.js"),

  1746       /* allowDelayedLoad = */ true,

  1747       /* aRunInGlobalScope */ true);

  1748   }

  1750   return NS_OK;

  1751 }

  1753 void

  1754 nsFrameLoader::GetURL(nsString& aURI)

  1755 {

  1756   aURI.Truncate();

  1758   if (mOwnerContent->Tag() == nsGkAtoms::object) {

  1759     mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::data, aURI);

  1760   } else {

  1761     mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::src, aURI);

  1762   }

  1763 }

  1765 nsresult

  1766 nsFrameLoader::CheckForRecursiveLoad(nsIURI* aURI)

  1767 {

  1768   nsresult rv;

  1770   mDepthTooGreat = false;

  1771   rv = MaybeCreateDocShell();

  1772   if (NS_FAILED(rv)) {

  1773     return rv;

  1774   }

  1775   NS_ASSERTION(!mRemoteFrame,

  1776                "Shouldn't call CheckForRecursiveLoad on remote frames.");

  1777   if (!mDocShell) {

  1778     return NS_ERROR_FAILURE;

  1779   }

  1781   // Check that we're still in the docshell tree.

  1782   nsCOMPtr<nsIDocShellTreeOwner> treeOwner;

  1783   mDocShell->GetTreeOwner(getter_AddRefs(treeOwner));

  1784   NS_WARN_IF_FALSE(treeOwner,

  1785                    "Trying to load a new url to a docshell without owner!");

  1786   NS_ENSURE_STATE(treeOwner);

  1788   if (mDocShell->ItemType() != nsIDocShellTreeItem::typeContent) {

  1789     // No need to do recursion-protection here XXXbz why not??  Do we really

  1790     // trust people not to screw up with non-content docshells?

  1791     return NS_OK;

  1792   }

  1794   // Bug 8065: Don't exceed some maximum depth in content frames

  1795   // (MAX_DEPTH_CONTENT_FRAMES)

  1796   nsCOMPtr<nsIDocShellTreeItem> parentAsItem;

  1797   mDocShell->GetSameTypeParent(getter_AddRefs(parentAsItem));

  1798   int32_t depth = 0;

  1799   while (parentAsItem) {

  1800     ++depth;

  1802     if (depth >= MAX_DEPTH_CONTENT_FRAMES) {

  1803       mDepthTooGreat = true;

  1804       NS_WARNING("Too many nested content frames so giving up");

  1806       return NS_ERROR_UNEXPECTED; // Too deep, give up!  (silently?)

  1807     }

  1809     nsCOMPtr<nsIDocShellTreeItem> temp;

  1810     temp.swap(parentAsItem);

  1811     temp->GetSameTypeParent(getter_AddRefs(parentAsItem));

  1812   }

  1814   // Bug 136580: Check for recursive frame loading excluding about:srcdoc URIs.

  1815   // srcdoc URIs require their contents to be specified inline, so it isn't

  1816   // possible for undesirable recursion to occur without the aid of a

  1817   // non-srcdoc URI,  which this method will block normally.

  1818   // Besides, URI is not enough to guarantee uniqueness of srcdoc documents.

  1819   nsAutoCString buffer;

  1820   rv = aURI->GetScheme(buffer);

  1821   if (NS_SUCCEEDED(rv) && buffer.EqualsLiteral("about")) {

  1822     rv = aURI->GetPath(buffer);

  1823     if (NS_SUCCEEDED(rv) && buffer.EqualsLiteral("srcdoc")) {

  1824       // Duplicates allowed up to depth limits

  1825       return NS_OK;

  1826     }

  1827   }

  1828   int32_t matchCount = 0;

  1829   mDocShell->GetSameTypeParent(getter_AddRefs(parentAsItem));

  1830   while (parentAsItem) {

  1831     // Check the parent URI with the URI we're loading

  1832     nsCOMPtr<nsIWebNavigation> parentAsNav(do_QueryInterface(parentAsItem));

  1833     if (parentAsNav) {

  1834       // Does the URI match the one we're about to load?

  1835       nsCOMPtr<nsIURI> parentURI;

  1836       parentAsNav->GetCurrentURI(getter_AddRefs(parentURI));

  1837       if (parentURI) {

  1838         // Bug 98158/193011: We need to ignore data after the #

  1839         bool equal;

  1840         rv = aURI->EqualsExceptRef(parentURI, &equal);

  1841         NS_ENSURE_SUCCESS(rv, rv);

  1843         if (equal) {

  1844           matchCount++;

  1845           if (matchCount >= MAX_SAME_URL_CONTENT_FRAMES) {

  1846             NS_WARNING("Too many nested content frames have the same url (recursion?) so giving up");

  1847             return NS_ERROR_UNEXPECTED;

  1848           }

  1849         }

  1850       }

  1851     }

  1852     nsCOMPtr<nsIDocShellTreeItem> temp;

  1853     temp.swap(parentAsItem);

  1854     temp->GetSameTypeParent(getter_AddRefs(parentAsItem));

  1855   }

  1857   return NS_OK;

  1858 }

  1860 nsresult

  1861 nsFrameLoader::GetWindowDimensions(nsRect& aRect)

  1862 {

  1863   // Need to get outer window position here

  1864   nsIDocument* doc = mOwnerContent->GetDocument();

  1865   if (!doc) {

  1866     return NS_ERROR_FAILURE;

  1867   }

  1869   if (doc->IsResourceDoc()) {

  1870     return NS_ERROR_FAILURE;

  1871   }

  1873   nsCOMPtr<nsIWebNavigation> parentAsWebNav =

  1874     do_GetInterface(doc->GetWindow());

  1876   if (!parentAsWebNav) {

  1877     return NS_ERROR_FAILURE;

  1878   }

  1880   nsCOMPtr<nsIDocShellTreeItem> parentAsItem(do_QueryInterface(parentAsWebNav));

  1882   nsCOMPtr<nsIDocShellTreeOwner> parentOwner;

  1883   if (NS_FAILED(parentAsItem->GetTreeOwner(getter_AddRefs(parentOwner))) ||

  1884       !parentOwner) {

  1885     return NS_ERROR_FAILURE;

  1886   }

  1888   nsCOMPtr<nsIBaseWindow> treeOwnerAsWin(do_GetInterface(parentOwner));

  1889   treeOwnerAsWin->GetPosition(&aRect.x, &aRect.y);

  1890   treeOwnerAsWin->GetSize(&aRect.width, &aRect.height);

  1891   return NS_OK;

  1892 }

  1894 NS_IMETHODIMP

  1895 nsFrameLoader::UpdatePositionAndSize(nsSubDocumentFrame *aIFrame)

  1896 {

  1897   if (mRemoteFrame) {

  1898     if (mRemoteBrowser) {

  1899       nsIntSize size = aIFrame->GetSubdocumentSize();

  1900       nsRect dimensions;

  1901       NS_ENSURE_SUCCESS(GetWindowDimensions(dimensions), NS_ERROR_FAILURE);

  1902       mRemoteBrowser->UpdateDimensions(dimensions, size);

  1903     }

  1904     return NS_OK;

  1905   }

  1906   return UpdateBaseWindowPositionAndSize(aIFrame);

  1907 }

  1909 nsresult

  1910 nsFrameLoader::UpdateBaseWindowPositionAndSize(nsSubDocumentFrame *aIFrame)

  1911 {

  1912   nsCOMPtr<nsIDocShell> docShell;

  1913   GetDocShell(getter_AddRefs(docShell));

  1914   nsCOMPtr<nsIBaseWindow> baseWindow(do_QueryInterface(docShell));

  1916   // resize the sub document

  1917   if (baseWindow) {

  1918     int32_t x = 0;

  1919     int32_t y = 0;

  1921     nsWeakFrame weakFrame(aIFrame);

  1923     baseWindow->GetPositionAndSize(&x, &y, nullptr, nullptr);

  1925     if (!weakFrame.IsAlive()) {

  1926       // GetPositionAndSize() killed us

  1927       return NS_OK;

  1928     }

  1930     nsIntSize size = aIFrame->GetSubdocumentSize();

  1932     baseWindow->SetPositionAndSize(x, y, size.width, size.height, false);

  1933   }

  1935   return NS_OK;

  1936 }

  1938 NS_IMETHODIMP

  1939 nsFrameLoader::GetRenderMode(uint32_t* aRenderMode)

  1940 {

  1941   *aRenderMode = mRenderMode;

  1942   return NS_OK;

  1943 }

  1945 NS_IMETHODIMP

  1946 nsFrameLoader::SetRenderMode(uint32_t aRenderMode)

  1947 {

  1948   if (aRenderMode == mRenderMode) {

  1949     return NS_OK;

  1950   }

  1952   mRenderMode = aRenderMode;

  1953   return NS_OK;

  1954 }

  1956 NS_IMETHODIMP

  1957 nsFrameLoader::GetEventMode(uint32_t* aEventMode)

  1958 {

  1959   *aEventMode = mEventMode;

  1960   return NS_OK;

  1961 }

  1963 NS_IMETHODIMP

  1964 nsFrameLoader::SetEventMode(uint32_t aEventMode)

  1965 {

  1966   mEventMode = aEventMode;

  1967   return NS_OK;

  1968 }

  1970 NS_IMETHODIMP

  1971 nsFrameLoader::GetClipSubdocument(bool* aResult)

  1972 {

  1973   *aResult = mClipSubdocument;

  1974   return NS_OK;

  1975 }

  1977 NS_IMETHODIMP

  1978 nsFrameLoader::SetClipSubdocument(bool aClip)

  1979 {

  1980   mClipSubdocument = aClip;

  1981   nsIFrame* frame = GetPrimaryFrameOfOwningContent();

  1982   if (frame) {

  1983     frame->InvalidateFrame();

  1984     frame->PresContext()->PresShell()->

  1985       FrameNeedsReflow(frame, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);

  1986     nsSubDocumentFrame* subdocFrame = do_QueryFrame(frame);

  1987     if (subdocFrame) {

  1988       nsIFrame* subdocRootFrame = subdocFrame->GetSubdocumentRootFrame();

  1989       if (subdocRootFrame) {

  1990         nsIFrame* subdocRootScrollFrame = subdocRootFrame->PresContext()->PresShell()->

  1991           GetRootScrollFrame();

  1992         if (subdocRootScrollFrame) {

  1993           frame->PresContext()->PresShell()->

  1994             FrameNeedsReflow(frame, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);

  1995         }

  1996       }

  1997     }

  1998   }

  1999   return NS_OK;

  2000 }

  2002 NS_IMETHODIMP

  2003 nsFrameLoader::GetClampScrollPosition(bool* aResult)

  2004 {

  2005   *aResult = mClampScrollPosition;

  2006   return NS_OK;

  2007 }

  2009 NS_IMETHODIMP

  2010 nsFrameLoader::SetClampScrollPosition(bool aClamp)

  2011 {

  2012   mClampScrollPosition = aClamp;

  2014   // When turning clamping on, make sure the current position is clamped.

  2015   if (aClamp) {

  2016     nsIFrame* frame = GetPrimaryFrameOfOwningContent();

  2017     nsSubDocumentFrame* subdocFrame = do_QueryFrame(frame);

  2018     if (subdocFrame) {

  2019       nsIFrame* subdocRootFrame = subdocFrame->GetSubdocumentRootFrame();

  2020       if (subdocRootFrame) {

  2021         nsIScrollableFrame* subdocRootScrollFrame = subdocRootFrame->PresContext()->PresShell()->

  2022           GetRootScrollFrameAsScrollable();

  2023         if (subdocRootScrollFrame) {

  2024           subdocRootScrollFrame->ScrollTo(subdocRootScrollFrame->GetScrollPosition(), nsIScrollableFrame::INSTANT);

  2025         }

  2026       }

  2027     }

  2028   }

  2029   return NS_OK;

  2030 }

  2032 bool

  2033 nsFrameLoader::TryRemoteBrowser()

  2034 {

  2035   NS_ASSERTION(!mRemoteBrowser, "TryRemoteBrowser called with a remote browser already?");

  2037   nsIDocument* doc = mOwnerContent->GetDocument();

  2038   if (!doc) {

  2039     return false;

  2040   }

  2042   if (doc->IsResourceDoc()) {

  2043     // Don't allow subframe loads in external reference documents

  2044     return false;

  2045   }

  2047   nsCOMPtr<nsIWebNavigation> parentAsWebNav =

  2048     do_GetInterface(doc->GetWindow());

  2050   if (!parentAsWebNav) {

  2051     return false;

  2052   }

  2054   nsCOMPtr<nsIDocShellTreeItem> parentAsItem(do_QueryInterface(parentAsWebNav));

  2056   // <iframe mozbrowser> gets to skip these checks.

  2057   if (!OwnerIsBrowserOrAppFrame()) {

  2058     if (parentAsItem->ItemType() != nsIDocShellTreeItem::typeChrome) {

  2059       return false;

  2060     }

  2062     if (!mOwnerContent->IsXUL()) {

  2063       return false;

  2064     }

  2066     nsAutoString value;

  2067     mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::type, value);

  2069     if (!value.LowerCaseEqualsLiteral("content") &&

  2070         !StringBeginsWith(value, NS_LITERAL_STRING("content-"),

  2071                           nsCaseInsensitiveStringComparator())) {

  2072       return false;

  2073     }

  2074   }

  2076   uint32_t chromeFlags = 0;

  2077   nsCOMPtr<nsIDocShellTreeOwner> parentOwner;

  2078   if (NS_FAILED(parentAsItem->GetTreeOwner(getter_AddRefs(parentOwner))) ||

  2079       !parentOwner) {

  2080     return false;

  2081   }

  2082   nsCOMPtr<nsIXULWindow> window(do_GetInterface(parentOwner));

  2083   if (!window) {

  2084     return false;

  2085   }

  2086   if (NS_FAILED(window->GetChromeFlags(&chromeFlags))) {

  2087     return false;

  2088   }

  2090   PROFILER_LABEL("nsFrameLoader", "CreateRemoteBrowser");

  2092   MutableTabContext context;

  2093   nsCOMPtr<mozIApplication> ownApp = GetOwnApp();

  2094   nsCOMPtr<mozIApplication> containingApp = GetContainingApp();

  2095   ScrollingBehavior scrollingBehavior = DEFAULT_SCROLLING;

  2097   if (Preferences::GetBool("dom.browser_frames.useAsyncPanZoom", false) ||

  2098       mOwnerContent->AttrValueIs(kNameSpaceID_None,

  2099                                  nsGkAtoms::mozasyncpanzoom,

  2100                                  nsGkAtoms::_true,

  2101                                  eCaseMatters)) {

  2102     scrollingBehavior = ASYNC_PAN_ZOOM;

  2103   }

  2105   bool rv = true;

  2106   if (ownApp) {

  2107     rv = context.SetTabContextForAppFrame(ownApp, containingApp, scrollingBehavior);

  2108   } else if (OwnerIsBrowserFrame()) {

  2109     // The |else| above is unnecessary; OwnerIsBrowserFrame() implies !ownApp.

  2110     rv = context.SetTabContextForBrowserFrame(containingApp, scrollingBehavior);

  2111   } else {

  2112     rv = context.SetTabContextForNormalFrame(scrollingBehavior);

  2113   }

  2114   NS_ENSURE_TRUE(rv, false);

  2116   nsCOMPtr<Element> ownerElement = mOwnerContent;

  2117   mRemoteBrowser = ContentParent::CreateBrowserOrApp(context, ownerElement);

  2118   if (mRemoteBrowser) {

  2119     mChildID = mRemoteBrowser->Manager()->ChildID();

  2120     nsCOMPtr<nsIDocShellTreeItem> rootItem;

  2121     parentAsItem->GetRootTreeItem(getter_AddRefs(rootItem));

  2122     nsCOMPtr<nsIDOMWindow> rootWin = do_GetInterface(rootItem);

  2123     nsCOMPtr<nsIDOMChromeWindow> rootChromeWin = do_QueryInterface(rootWin);

  2124     NS_ABORT_IF_FALSE(rootChromeWin, "How did we not get a chrome window here?");

  2126     nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin;

  2127     rootChromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin));

  2128     mRemoteBrowser->SetBrowserDOMWindow(browserDOMWin);

  2130     mContentParent = mRemoteBrowser->Manager();

  2132     if (mOwnerContent->AttrValueIs(kNameSpaceID_None,

  2133                                    nsGkAtoms::mozpasspointerevents,

  2134                                    nsGkAtoms::_true,

  2135                                    eCaseMatters)) {

  2136       unused << mRemoteBrowser->SendSetUpdateHitRegion(true);

  2137     }

  2138   }

  2139   return true;

  2140 }

  2142 mozilla::dom::PBrowserParent*

  2143 nsFrameLoader::GetRemoteBrowser()

  2144 {

  2145   return mRemoteBrowser;

  2146 }

  2148 NS_IMETHODIMP

  2149 nsFrameLoader::ActivateRemoteFrame() {

  2150   if (mRemoteBrowser) {

  2151     mRemoteBrowser->Activate();

  2152     return NS_OK;

  2153   }

  2154   return NS_ERROR_UNEXPECTED;

  2155 }

  2157 NS_IMETHODIMP

  2158 nsFrameLoader::DeactivateRemoteFrame() {

  2159   if (mRemoteBrowser) {

  2160     mRemoteBrowser->Deactivate();

  2161     return NS_OK;

  2162   }

  2163   return NS_ERROR_UNEXPECTED;

  2164 }

  2166 NS_IMETHODIMP

  2167 nsFrameLoader::SendCrossProcessMouseEvent(const nsAString& aType,

  2168                                           float aX,

  2169                                           float aY,

  2170                                           int32_t aButton,

  2171                                           int32_t aClickCount,

  2172                                           int32_t aModifiers,

  2173                                           bool aIgnoreRootScrollFrame)

  2174 {

  2175   if (mRemoteBrowser) {

  2176     mRemoteBrowser->SendMouseEvent(aType, aX, aY, aButton,

  2177                                    aClickCount, aModifiers,

  2178                                    aIgnoreRootScrollFrame);

  2179     return NS_OK;

  2180   }

  2181   return NS_ERROR_FAILURE;

  2182 }

  2184 NS_IMETHODIMP

  2185 nsFrameLoader::ActivateFrameEvent(const nsAString& aType,

  2186                                   bool aCapture)

  2187 {

  2188   if (mRemoteBrowser) {

  2189     return mRemoteBrowser->SendActivateFrameEvent(nsString(aType), aCapture) ?

  2190       NS_OK : NS_ERROR_NOT_AVAILABLE;

  2191   }

  2192   return NS_ERROR_FAILURE;

  2193 }

  2195 NS_IMETHODIMP

  2196 nsFrameLoader::SendCrossProcessKeyEvent(const nsAString& aType,

  2197                                         int32_t aKeyCode,

  2198                                         int32_t aCharCode,

  2199                                         int32_t aModifiers,

  2200                                         bool aPreventDefault)

  2201 {

  2202   if (mRemoteBrowser) {

  2203     mRemoteBrowser->SendKeyEvent(aType, aKeyCode, aCharCode, aModifiers,

  2204                                  aPreventDefault);

  2205     return NS_OK;

  2206   }

  2207   return NS_ERROR_FAILURE;

  2208 }

  2210 nsresult

  2211 nsFrameLoader::CreateStaticClone(nsIFrameLoader* aDest)

  2212 {

  2213   nsFrameLoader* dest = static_cast<nsFrameLoader*>(aDest);

  2214   dest->MaybeCreateDocShell();

  2215   NS_ENSURE_STATE(dest->mDocShell);

  2217   nsCOMPtr<nsIDocument> dummy = do_GetInterface(dest->mDocShell);

  2218   nsCOMPtr<nsIContentViewer> viewer;

  2219   dest->mDocShell->GetContentViewer(getter_AddRefs(viewer));

  2220   NS_ENSURE_STATE(viewer);

  2222   nsCOMPtr<nsIDocShell> origDocShell;

  2223   GetDocShell(getter_AddRefs(origDocShell));

  2224   nsCOMPtr<nsIDocument> doc = do_GetInterface(origDocShell);

  2225   NS_ENSURE_STATE(doc);

  2226   nsCOMPtr<nsIDocument> clonedDoc = doc->CreateStaticClone(dest->mDocShell);

  2227   nsCOMPtr<nsIDOMDocument> clonedDOMDoc = do_QueryInterface(clonedDoc);

  2229   viewer->SetDOMDocument(clonedDOMDoc);

  2230   return NS_OK;

  2231 }

  2233 bool

  2234 nsFrameLoader::DoLoadFrameScript(const nsAString& aURL, bool aRunInGlobalScope)

  2235 {

  2236   mozilla::dom::PBrowserParent* tabParent = GetRemoteBrowser();

  2237   if (tabParent) {

  2238     return tabParent->SendLoadRemoteScript(nsString(aURL), aRunInGlobalScope);

  2239   }

  2240   nsRefPtr<nsInProcessTabChildGlobal> tabChild =

  2241     static_cast<nsInProcessTabChildGlobal*>(GetTabChildGlobalAsEventTarget());

  2242   if (tabChild) {

  2243     tabChild->LoadFrameScript(aURL, aRunInGlobalScope);

  2244   }

  2245   return true;

  2246 }

  2248 class nsAsyncMessageToChild : public nsSameProcessAsyncMessageBase,

  2249                               public nsRunnable

  2250 {

  2251 public:

  2252   nsAsyncMessageToChild(JSContext* aCx,

  2253                         nsFrameLoader* aFrameLoader,

  2254                         const nsAString& aMessage,

  2255                         const StructuredCloneData& aData,

  2256                         JS::Handle<JSObject *> aCpows,

  2257                         nsIPrincipal* aPrincipal)

  2258     : nsSameProcessAsyncMessageBase(aCx, aMessage, aData, aCpows, aPrincipal)

  2259     , mFrameLoader(aFrameLoader)

  2260   {

  2261   }

  2263   NS_IMETHOD Run()

  2264   {

  2265     nsInProcessTabChildGlobal* tabChild =

  2266       static_cast<nsInProcessTabChildGlobal*>(mFrameLoader->mChildMessageManager.get());

  2267     if (tabChild && tabChild->GetInnerManager()) {

  2268       nsCOMPtr<nsIXPConnectJSObjectHolder> kungFuDeathGrip(tabChild->GetGlobal());

  2269       ReceiveMessage(static_cast<EventTarget*>(tabChild),

  2270                      tabChild->GetInnerManager());

  2271     }

  2272     return NS_OK;

  2273   }

  2274   nsRefPtr<nsFrameLoader> mFrameLoader;

  2275 };

  2277 bool

  2278 nsFrameLoader::DoSendAsyncMessage(JSContext* aCx,

  2279                                   const nsAString& aMessage,

  2280                                   const StructuredCloneData& aData,

  2281                                   JS::Handle<JSObject *> aCpows,

  2282                                   nsIPrincipal* aPrincipal)

  2283 {

  2284   TabParent* tabParent = mRemoteBrowser;

  2285   if (tabParent) {

  2286     ClonedMessageData data;

  2287     ContentParent* cp = tabParent->Manager();

  2288     if (!BuildClonedMessageDataForParent(cp, aData, data)) {

  2289       return false;

  2290     }

  2291     InfallibleTArray<mozilla::jsipc::CpowEntry> cpows;

  2292     if (aCpows && !cp->GetCPOWManager()->Wrap(aCx, aCpows, &cpows)) {

  2293       return false;

  2294     }

  2295     return tabParent->SendAsyncMessage(nsString(aMessage), data, cpows,

  2296                                        aPrincipal);

  2297   }

  2299   if (mChildMessageManager) {

  2300     nsRefPtr<nsIRunnable> ev = new nsAsyncMessageToChild(aCx, this, aMessage,

  2301                                                          aData, aCpows,

  2302                                                          aPrincipal);

  2303     NS_DispatchToCurrentThread(ev);

  2304     return true;

  2305   }

  2307   // We don't have any targets to send our asynchronous message to.

  2308   return false;

  2309 }

  2311 bool

  2312 nsFrameLoader::CheckPermission(const nsAString& aPermission)

  2313 {

  2314   return AssertAppProcessPermission(GetRemoteBrowser(),

  2315                                     NS_ConvertUTF16toUTF8(aPermission).get());

  2316 }

  2318 bool

  2319 nsFrameLoader::CheckManifestURL(const nsAString& aManifestURL)

  2320 {

  2321   return AssertAppProcessManifestURL(GetRemoteBrowser(),

  2322                                      NS_ConvertUTF16toUTF8(aManifestURL).get());

  2323 }

  2325 bool

  2326 nsFrameLoader::CheckAppHasPermission(const nsAString& aPermission)

  2327 {

  2328   return AssertAppHasPermission(GetRemoteBrowser(),

  2329                                 NS_ConvertUTF16toUTF8(aPermission).get());

  2330 }

  2332 NS_IMETHODIMP

  2333 nsFrameLoader::GetMessageManager(nsIMessageSender** aManager)

  2334 {

  2335   EnsureMessageManager();

  2336   if (mMessageManager) {

  2337     CallQueryInterface(mMessageManager, aManager);

  2338   }

  2339   return NS_OK;

  2340 }

  2342 NS_IMETHODIMP

  2343 nsFrameLoader::GetContentViewsIn(float aXPx, float aYPx,

  2344                                  float aTopSize, float aRightSize,

  2345                                  float aBottomSize, float aLeftSize,

  2346                                  uint32_t* aLength,

  2347                                  nsIContentView*** aResult)

  2348 {

  2349   nscoord x = nsPresContext::CSSPixelsToAppUnits(aXPx - aLeftSize);

  2350   nscoord y = nsPresContext::CSSPixelsToAppUnits(aYPx - aTopSize);

  2351   nscoord w = nsPresContext::CSSPixelsToAppUnits(aLeftSize + aRightSize) + 1;

  2352   nscoord h = nsPresContext::CSSPixelsToAppUnits(aTopSize + aBottomSize) + 1;

  2353   nsRect target(x, y, w, h);

  2355   nsIFrame* frame = GetPrimaryFrameOfOwningContent();

  2357   nsTArray<ViewID> ids;

  2358   nsLayoutUtils::GetRemoteContentIds(frame, target, ids, true);

  2359   if (ids.Length() == 0 || !GetCurrentRemoteFrame()) {

  2360     *aResult = nullptr;

  2361     *aLength = 0;

  2362     return NS_OK;

  2363   }

  2365   nsIContentView** result = reinterpret_cast<nsIContentView**>(

  2366     NS_Alloc(ids.Length() * sizeof(nsIContentView*)));

  2368   for (uint32_t i = 0; i < ids.Length(); i++) {

  2369     nsIContentView* view = GetCurrentRemoteFrame()->GetContentView(ids[i]);

  2370     NS_ABORT_IF_FALSE(view, "Retrieved ID from RenderFrameParent, it should be valid!");

  2371     nsRefPtr<nsIContentView>(view).forget(&result[i]);

  2372   }

  2374   *aResult = result;

  2375   *aLength = ids.Length();

  2377   return NS_OK;

  2378 }

  2380 NS_IMETHODIMP

  2381 nsFrameLoader::GetRootContentView(nsIContentView** aContentView)

  2382 {

  2383   RenderFrameParent* rfp = GetCurrentRemoteFrame();

  2384   if (!rfp) {

  2385     *aContentView = nullptr;

  2386     return NS_OK;

  2387   }

  2389   nsContentView* view = rfp->GetRootContentView();

  2390   NS_ABORT_IF_FALSE(view, "Should always be able to create root scrollable!");

  2391   nsRefPtr<nsIContentView>(view).forget(aContentView);

  2393   return NS_OK;

  2394 }

  2396 nsresult

  2397 nsFrameLoader::EnsureMessageManager()

  2398 {

  2399   NS_ENSURE_STATE(mOwnerContent);

  2401   nsresult rv = MaybeCreateDocShell();

  2402   if (NS_FAILED(rv)) {

  2403     return rv;

  2404   }

  2406   if (!mIsTopLevelContent && !OwnerIsBrowserOrAppFrame() && !mRemoteFrame) {

  2407     return NS_OK;

  2408   }

  2410   if (mMessageManager) {

  2411     if (ShouldUseRemoteProcess() && mRemoteBrowserShown) {

  2412       mMessageManager->InitWithCallback(this);

  2413     }

  2414     return NS_OK;

  2415   }

  2417   nsIScriptContext* sctx = mOwnerContent->GetContextForEventHandlers(&rv);

  2418   NS_ENSURE_SUCCESS(rv, rv);

  2419   NS_ENSURE_STATE(sctx);

  2420   AutoPushJSContext cx(sctx->GetNativeContext());

  2421   NS_ENSURE_STATE(cx);

  2423   nsCOMPtr<nsIDOMChromeWindow> chromeWindow =

  2424     do_QueryInterface(GetOwnerDoc()->GetWindow());

  2425   nsCOMPtr<nsIMessageBroadcaster> parentManager;

  2426   if (chromeWindow) {

  2427     chromeWindow->GetMessageManager(getter_AddRefs(parentManager));

  2428   }

  2430   if (ShouldUseRemoteProcess()) {

  2431     mMessageManager = new nsFrameMessageManager(mRemoteBrowserShown ? this : nullptr,

  2432                                                 static_cast<nsFrameMessageManager*>(parentManager.get()),

  2433                                                 MM_CHROME);

  2434   } else {

  2435     mMessageManager = new nsFrameMessageManager(nullptr,

  2436                                                 static_cast<nsFrameMessageManager*>(parentManager.get()),

  2437                                                 MM_CHROME);

  2439     mChildMessageManager =

  2440       new nsInProcessTabChildGlobal(mDocShell, mOwnerContent, mMessageManager);

  2441     // Force pending frame scripts to be loaded.

  2442     mMessageManager->InitWithCallback(this);

  2443   }

  2444   return NS_OK;

  2445 }

  2447 EventTarget*

  2448 nsFrameLoader::GetTabChildGlobalAsEventTarget()

  2449 {

  2450   return static_cast<nsInProcessTabChildGlobal*>(mChildMessageManager.get());

  2451 }

  2453 NS_IMETHODIMP

  2454 nsFrameLoader::GetOwnerElement(nsIDOMElement **aElement)

  2455 {

  2456   nsCOMPtr<nsIDOMElement> ownerElement = do_QueryInterface(mOwnerContent);

  2457   ownerElement.forget(aElement);

  2458   return NS_OK;

  2459 }

  2461 NS_IMETHODIMP

  2462 nsFrameLoader::GetChildID(uint64_t* aChildID)

  2463 {

  2464   *aChildID = mChildID;

  2465   return NS_OK;

  2466 }

  2468 void

  2469 nsFrameLoader::SetRemoteBrowser(nsITabParent* aTabParent)

  2470 {

  2471   MOZ_ASSERT(!mRemoteBrowser);

  2472   MOZ_ASSERT(!mCurrentRemoteFrame);

  2473   mRemoteFrame = true;

  2474   mRemoteBrowser = static_cast<TabParent*>(aTabParent);

  2475   mChildID = mRemoteBrowser ? mRemoteBrowser->Manager()->ChildID() : 0;

  2476   ShowRemoteFrame(nsIntSize(0, 0));

  2477 }

  2479 void

  2480 nsFrameLoader::SetDetachedSubdocView(nsView* aDetachedViews,

  2481                                      nsIDocument* aContainerDoc)

  2482 {

  2483   mDetachedSubdocViews = aDetachedViews;

  2484   mContainerDocWhileDetached = aContainerDoc;

  2485 }

  2487 nsView*

  2488 nsFrameLoader::GetDetachedSubdocView(nsIDocument** aContainerDoc) const

  2489 {

  2490   NS_IF_ADDREF(*aContainerDoc = mContainerDocWhileDetached);

  2491   return mDetachedSubdocViews;

  2492 }

  2494 void

  2495 nsFrameLoader::ApplySandboxFlags(uint32_t sandboxFlags)

  2496 {

  2497   if (mDocShell) {

  2498     uint32_t parentSandboxFlags = mOwnerContent->OwnerDoc()->GetSandboxFlags();

  2500     // The child can only add restrictions, never remove them.

  2501     sandboxFlags |= parentSandboxFlags;

  2502     mDocShell->SetSandboxFlags(sandboxFlags);

  2503   }

  2504 }

  2506 /* virtual */ void

  2507 nsFrameLoader::AttributeChanged(nsIDocument* aDocument,

  2508                                 mozilla::dom::Element* aElement,

  2509                                 int32_t      aNameSpaceID,

  2510                                 nsIAtom*     aAttribute,

  2511                                 int32_t      aModType)

  2512 {

  2513   MOZ_ASSERT(mObservingOwnerContent);

  2514   // TODO: Implement ContentShellAdded for remote browsers (bug 658304)

  2515   MOZ_ASSERT(!mRemoteBrowser);

  2517   if (aNameSpaceID != kNameSpaceID_None || aAttribute != TypeAttrName()) {

  2518     return;

  2519   }

  2521   if (aElement != mOwnerContent) {

  2522     return;

  2523   }

  2525   // Note: This logic duplicates a lot of logic in

  2526   // MaybeCreateDocshell.  We should fix that.

  2528   // Notify our enclosing chrome that our type has changed.  We only do this

  2529   // if our parent is chrome, since in all other cases we're random content

  2530   // subframes and the treeowner shouldn't worry about us.

  2531   if (!mDocShell) {

  2532     return;

  2533   }

  2535   nsCOMPtr<nsIDocShellTreeItem> parentItem;

  2536   mDocShell->GetParent(getter_AddRefs(parentItem));

  2537   if (!parentItem) {

  2538     return;

  2539   }

  2541   if (parentItem->ItemType() != nsIDocShellTreeItem::typeChrome) {

  2542     return;

  2543   }

  2545   nsCOMPtr<nsIDocShellTreeOwner> parentTreeOwner;

  2546   parentItem->GetTreeOwner(getter_AddRefs(parentTreeOwner));

  2547   if (!parentTreeOwner) {

  2548     return;

  2549   }

  2551   nsAutoString value;

  2552   aElement->GetAttr(kNameSpaceID_None, TypeAttrName(), value);

  2554   bool is_primary = value.LowerCaseEqualsLiteral("content-primary");

  2556 #ifdef MOZ_XUL

  2557   // when a content panel is no longer primary, hide any open popups it may have

  2558   if (!is_primary) {

  2559     nsXULPopupManager* pm = nsXULPopupManager::GetInstance();

  2560     if (pm)

  2561       pm->HidePopupsInDocShell(mDocShell);

  2562   }

  2563 #endif

  2565   parentTreeOwner->ContentShellRemoved(mDocShell);

  2566   if (value.LowerCaseEqualsLiteral("content") ||

  2567       StringBeginsWith(value, NS_LITERAL_STRING("content-"),

  2568                        nsCaseInsensitiveStringComparator())) {

  2569     bool is_targetable = is_primary ||

  2570       value.LowerCaseEqualsLiteral("content-targetable");

  2572     parentTreeOwner->ContentShellAdded(mDocShell, is_primary,

  2573                                        is_targetable, value);

  2574   }

  2575 }

  2577 void

  2578 nsFrameLoader::ResetPermissionManagerStatus()

  2579 {

  2580   // The resetting of the permissions status can run only

  2581   // in the main process.

  2582   if (XRE_GetProcessType() == GeckoProcessType_Content) {

  2583     return;

  2584   }

  2586   // Finding the new app Id:

  2587   // . first we check if the owner is an app frame

  2588   // . second, we check if the owner is a browser frame

  2589   // in both cases we populate the appId variable.

  2590   uint32_t appId = nsIScriptSecurityManager::NO_APP_ID;

  2591   if (OwnerIsAppFrame()) {

  2592     // You can't be both an app and a browser frame.

  2593     MOZ_ASSERT(!OwnerIsBrowserFrame());

  2595     nsCOMPtr<mozIApplication> ownApp = GetOwnApp();

  2596     MOZ_ASSERT(ownApp);

  2597     uint32_t ownAppId = nsIScriptSecurityManager::NO_APP_ID;

  2598     if (ownApp && NS_SUCCEEDED(ownApp->GetLocalId(&ownAppId))) {

  2599       appId = ownAppId;

  2600     }

  2601   }

  2603   if (OwnerIsBrowserFrame()) {

  2604     // You can't be both a browser and an app frame.

  2605     MOZ_ASSERT(!OwnerIsAppFrame());

  2607     nsCOMPtr<mozIApplication> containingApp = GetContainingApp();

  2608     uint32_t containingAppId = nsIScriptSecurityManager::NO_APP_ID;

  2609     if (containingApp && NS_SUCCEEDED(containingApp->GetLocalId(&containingAppId))) {

  2610       appId = containingAppId;

  2611     }

  2612   }

  2614   // Nothing changed.

  2615   if (appId == mAppIdSentToPermissionManager) {

  2616     return;

  2617   }

  2619   nsCOMPtr<nsIPermissionManager> permMgr = do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);

  2620   if (!permMgr) {

  2621     NS_ERROR("No PermissionManager available!");

  2622     return;

  2623   }

  2625   // If previously we registered an appId, we have to unregister it.

  2626   if (mAppIdSentToPermissionManager != nsIScriptSecurityManager::NO_APP_ID) {

  2627     permMgr->ReleaseAppId(mAppIdSentToPermissionManager);

  2628     mAppIdSentToPermissionManager = nsIScriptSecurityManager::NO_APP_ID;

  2629   }

  2631   // Register the new AppId.

  2632   if (appId != nsIScriptSecurityManager::NO_APP_ID) {

  2633     mAppIdSentToPermissionManager = appId;

  2634     permMgr->AddrefAppId(mAppIdSentToPermissionManager);

  2635   }

  2636 }

  2638 /* [infallible] */ NS_IMETHODIMP

  2639 nsFrameLoader::SetVisible(bool aVisible)

  2640 {

  2641   if (mVisible == aVisible) {

  2642     return NS_OK;

  2643   }

  2645   mVisible = aVisible;

  2646   nsCOMPtr<nsIObserverService> os = services::GetObserverService();

  2647   if (os) {

  2648     os->NotifyObservers(NS_ISUPPORTS_CAST(nsIFrameLoader*, this),

  2649                         "frameloader-visible-changed", nullptr);

  2650   }

  2651   return NS_OK;

  2652 }

  2654 /* [infallible] */ NS_IMETHODIMP

  2655 nsFrameLoader::GetVisible(bool* aVisible)

  2656 {

  2657   *aVisible = mVisible;

  2658   return NS_OK;

  2659 }

  2661 NS_IMETHODIMP

  2662 nsFrameLoader::GetTabParent(nsITabParent** aTabParent)

  2663 {

  2664   nsCOMPtr<nsITabParent> tp = mRemoteBrowser;

  2665   tp.forget(aTabParent);

  2666   return NS_OK;

  2667 }

  2669 NS_IMETHODIMP

  2670 nsFrameLoader::GetLoadContext(nsILoadContext** aLoadContext)

  2671 {

  2672   nsCOMPtr<nsILoadContext> loadContext;

  2673   if (mRemoteBrowser) {

  2674     loadContext = mRemoteBrowser->GetLoadContext();

  2675   } else {

  2676     nsCOMPtr<nsIDocShell> docShell;

  2677     GetDocShell(getter_AddRefs(docShell));

  2678     loadContext = do_GetInterface(docShell);

  2679   }

  2680   loadContext.forget(aLoadContext);

  2681   return NS_OK;

  2682 }

The Tor Browser / file revision

content/base/src/nsFrameLoader.cpp@deefc01c0e14

content/base/src/nsFrameLoader.cpp