LCOV - code coverage report
Current view: directory - content/xbl/src - nsXBLResourceLoader.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 118 2 1.7 %
Date: 2012-06-02 Functions: 17 2 11.8 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla Communicator client code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Original Author: David W. Hyatt (hyatt@netscape.com)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "nsTArray.h"
      40                 : #include "nsString.h"
      41                 : #include "nsCSSStyleSheet.h"
      42                 : #include "nsIStyleRuleProcessor.h"
      43                 : #include "nsIDocument.h"
      44                 : #include "nsIContent.h"
      45                 : #include "nsIPresShell.h"
      46                 : #include "nsIXBLService.h"
      47                 : #include "nsIServiceManager.h"
      48                 : #include "nsXBLResourceLoader.h"
      49                 : #include "nsXBLPrototypeResources.h"
      50                 : #include "nsIDocumentObserver.h"
      51                 : #include "imgILoader.h"
      52                 : #include "imgIRequest.h"
      53                 : #include "mozilla/css/Loader.h"
      54                 : #include "nsIURI.h"
      55                 : #include "nsNetUtil.h"
      56                 : #include "nsGkAtoms.h"
      57                 : #include "nsFrameManager.h"
      58                 : #include "nsStyleContext.h"
      59                 : #include "nsXBLPrototypeBinding.h"
      60                 : #include "nsCSSRuleProcessor.h"
      61                 : #include "nsContentUtils.h"
      62                 : #include "nsStyleSet.h"
      63                 : #include "nsIScriptSecurityManager.h"
      64                 : 
      65            1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(nsXBLResourceLoader)
      66               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsXBLResourceLoader)
      67               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(mBoundElements)
      68               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      69               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsXBLResourceLoader)
      70               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(mBoundElements)
      71               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      72                 : 
      73               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXBLResourceLoader)
      74               0 :   NS_INTERFACE_MAP_ENTRY(nsICSSLoaderObserver)
      75               0 :   NS_INTERFACE_MAP_ENTRY(nsISupports)
      76               0 : NS_INTERFACE_MAP_END
      77                 : 
      78               0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXBLResourceLoader)
      79               0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXBLResourceLoader)
      80                 : 
      81               0 : nsXBLResourceLoader::nsXBLResourceLoader(nsXBLPrototypeBinding* aBinding,
      82                 :                                          nsXBLPrototypeResources* aResources)
      83                 : :mBinding(aBinding),
      84                 :  mResources(aResources),
      85                 :  mResourceList(nsnull),
      86                 :  mLastResource(nsnull),
      87                 :  mLoadingResources(false),
      88                 :  mInLoadResourcesFunc(false),
      89               0 :  mPendingSheets(0)
      90                 : {
      91               0 : }
      92                 : 
      93               0 : nsXBLResourceLoader::~nsXBLResourceLoader()
      94                 : {
      95               0 :   delete mResourceList;
      96               0 : }
      97                 : 
      98                 : void
      99               0 : nsXBLResourceLoader::LoadResources(bool* aResult)
     100                 : {
     101               0 :   mInLoadResourcesFunc = true;
     102                 : 
     103               0 :   if (mLoadingResources) {
     104               0 :     *aResult = (mPendingSheets == 0);
     105               0 :     mInLoadResourcesFunc = false;
     106               0 :     return;
     107                 :   }
     108                 : 
     109               0 :   mLoadingResources = true;
     110               0 :   *aResult = true;
     111                 : 
     112                 :   // Declare our loaders.
     113               0 :   nsCOMPtr<nsIDocument> doc = mBinding->XBLDocumentInfo()->GetDocument();
     114                 : 
     115               0 :   mozilla::css::Loader* cssLoader = doc->CSSLoader();
     116               0 :   nsIURI *docURL = doc->GetDocumentURI();
     117               0 :   nsIPrincipal* docPrincipal = doc->NodePrincipal();
     118                 : 
     119               0 :   nsCOMPtr<nsIURI> url;
     120                 : 
     121               0 :   for (nsXBLResource* curr = mResourceList; curr; curr = curr->mNext) {
     122               0 :     if (curr->mSrc.IsEmpty())
     123               0 :       continue;
     124                 : 
     125               0 :     if (NS_FAILED(NS_NewURI(getter_AddRefs(url), curr->mSrc,
     126                 :                             doc->GetDocumentCharacterSet().get(), docURL)))
     127               0 :       continue;
     128                 : 
     129               0 :     if (curr->mType == nsGkAtoms::image) {
     130               0 :       if (!nsContentUtils::CanLoadImage(url, doc, doc, docPrincipal)) {
     131                 :         // We're not permitted to load this image, move on...
     132               0 :         continue;
     133                 :       }
     134                 : 
     135                 :       // Now kick off the image load...
     136                 :       // Passing NULL for pretty much everything -- cause we don't care!
     137                 :       // XXX: initialDocumentURI is NULL! 
     138               0 :       nsCOMPtr<imgIRequest> req;
     139                 :       nsContentUtils::LoadImage(url, doc, docPrincipal, docURL, nsnull,
     140                 :                                 nsIRequest::LOAD_BACKGROUND,
     141               0 :                                 getter_AddRefs(req));
     142                 :     }
     143               0 :     else if (curr->mType == nsGkAtoms::stylesheet) {
     144                 :       // Kick off the load of the stylesheet.
     145                 : 
     146                 :       // Always load chrome synchronously
     147                 :       // XXXbz should that still do a content policy check?
     148                 :       bool chrome;
     149                 :       nsresult rv;
     150               0 :       if (NS_SUCCEEDED(url->SchemeIs("chrome", &chrome)) && chrome)
     151                 :       {
     152               0 :         rv = nsContentUtils::GetSecurityManager()->
     153                 :           CheckLoadURIWithPrincipal(docPrincipal, url,
     154               0 :                                     nsIScriptSecurityManager::ALLOW_CHROME);
     155               0 :         if (NS_SUCCEEDED(rv)) {
     156               0 :           nsRefPtr<nsCSSStyleSheet> sheet;
     157               0 :           rv = cssLoader->LoadSheetSync(url, getter_AddRefs(sheet));
     158               0 :           NS_ASSERTION(NS_SUCCEEDED(rv), "Load failed!!!");
     159               0 :           if (NS_SUCCEEDED(rv))
     160                 :           {
     161               0 :             rv = StyleSheetLoaded(sheet, false, NS_OK);
     162               0 :             NS_ASSERTION(NS_SUCCEEDED(rv), "Processing the style sheet failed!!!");
     163                 :           }
     164                 :         }
     165                 :       }
     166                 :       else
     167                 :       {
     168               0 :         rv = cssLoader->LoadSheet(url, docPrincipal, EmptyCString(), this);
     169               0 :         if (NS_SUCCEEDED(rv))
     170               0 :           ++mPendingSheets;
     171                 :       }
     172                 :     }
     173                 :   }
     174                 : 
     175               0 :   *aResult = (mPendingSheets == 0);
     176               0 :   mInLoadResourcesFunc = false;
     177                 :   
     178                 :   // Destroy our resource list.
     179               0 :   delete mResourceList;
     180               0 :   mResourceList = nsnull;
     181                 : }
     182                 : 
     183                 : // nsICSSLoaderObserver
     184                 : NS_IMETHODIMP
     185               0 : nsXBLResourceLoader::StyleSheetLoaded(nsCSSStyleSheet* aSheet,
     186                 :                                       bool aWasAlternate,
     187                 :                                       nsresult aStatus)
     188                 : {
     189               0 :   if (!mResources) {
     190                 :     // Our resources got destroyed -- just bail out
     191               0 :     return NS_OK;
     192                 :   }
     193                 :    
     194               0 :   mResources->mStyleSheetList.AppendElement(aSheet);
     195                 : 
     196               0 :   if (!mInLoadResourcesFunc)
     197               0 :     mPendingSheets--;
     198                 :   
     199               0 :   if (mPendingSheets == 0) {
     200                 :     // All stylesheets are loaded.  
     201                 :     mResources->mRuleProcessor =
     202                 :       new nsCSSRuleProcessor(mResources->mStyleSheetList, 
     203               0 :                              nsStyleSet::eDocSheet);
     204                 : 
     205                 :     // XXX Check for mPendingScripts when scripts also come online.
     206               0 :     if (!mInLoadResourcesFunc)
     207               0 :       NotifyBoundElements();
     208                 :   }
     209               0 :   return NS_OK;
     210                 : }
     211                 : 
     212                 : void 
     213               0 : nsXBLResourceLoader::AddResource(nsIAtom* aResourceType, const nsAString& aSrc)
     214                 : {
     215               0 :   nsXBLResource* res = new nsXBLResource(aResourceType, aSrc);
     216               0 :   if (!res)
     217               0 :     return;
     218                 : 
     219               0 :   if (!mResourceList)
     220               0 :     mResourceList = res;
     221                 :   else
     222               0 :     mLastResource->mNext = res;
     223                 : 
     224               0 :   mLastResource = res;
     225                 : }
     226                 : 
     227                 : void
     228               0 : nsXBLResourceLoader::AddResourceListener(nsIContent* aBoundElement) 
     229                 : {
     230               0 :   if (aBoundElement) {
     231               0 :     mBoundElements.AppendObject(aBoundElement);
     232                 :   }
     233               0 : }
     234                 : 
     235                 : void
     236               0 : nsXBLResourceLoader::NotifyBoundElements()
     237                 : {
     238               0 :   nsCOMPtr<nsIXBLService> xblService(do_GetService("@mozilla.org/xbl;1"));
     239               0 :   nsIURI* bindingURI = mBinding->BindingURI();
     240                 : 
     241               0 :   PRUint32 eltCount = mBoundElements.Count();
     242               0 :   for (PRUint32 j = 0; j < eltCount; j++) {
     243               0 :     nsCOMPtr<nsIContent> content = mBoundElements.ObjectAt(j);
     244                 :     
     245               0 :     bool ready = false;
     246               0 :     xblService->BindingReady(content, bindingURI, &ready);
     247                 : 
     248               0 :     if (ready) {
     249                 :       // We need the document to flush out frame construction and
     250                 :       // such, so we want to use the current document.
     251               0 :       nsIDocument* doc = content->GetCurrentDoc();
     252                 :     
     253               0 :       if (doc) {
     254                 :         // Flush first to make sure we can get the frame for content
     255               0 :         doc->FlushPendingNotifications(Flush_Frames);
     256                 : 
     257                 :         // If |content| is (in addition to having binding |mBinding|)
     258                 :         // also a descendant of another element with binding |mBinding|,
     259                 :         // then we might have just constructed it due to the
     260                 :         // notification of its parent.  (We can know about both if the
     261                 :         // binding loads were triggered from the DOM rather than frame
     262                 :         // construction.)  So we have to check both whether the element
     263                 :         // has a primary frame and whether it's in the undisplayed map
     264                 :         // before sending a ContentInserted notification, or bad things
     265                 :         // will happen.
     266               0 :         nsIPresShell *shell = doc->GetShell();
     267               0 :         if (shell) {
     268               0 :           nsIFrame* childFrame = content->GetPrimaryFrame();
     269               0 :           if (!childFrame) {
     270                 :             // Check to see if it's in the undisplayed content map.
     271                 :             nsStyleContext* sc =
     272               0 :               shell->FrameManager()->GetUndisplayedContent(content);
     273                 : 
     274               0 :             if (!sc) {
     275               0 :               shell->RecreateFramesFor(content);
     276                 :             }
     277                 :           }
     278                 :         }
     279                 : 
     280                 :         // Flush again
     281                 :         // XXXbz why is this needed?
     282               0 :         doc->FlushPendingNotifications(Flush_ContentAndNotify);
     283                 :       }
     284                 :     }
     285                 :   }
     286                 : 
     287                 :   // Clear out the whole array.
     288               0 :   mBoundElements.Clear();
     289                 : 
     290                 :   // Delete ourselves.
     291               0 :   NS_RELEASE(mResources->mLoader);
     292               0 : }
     293                 : 
     294                 : nsresult
     295               0 : nsXBLResourceLoader::Write(nsIObjectOutputStream* aStream)
     296                 : {
     297                 :   nsresult rv;
     298                 : 
     299               0 :   for (nsXBLResource* curr = mResourceList; curr; curr = curr->mNext) {
     300               0 :     if (curr->mType == nsGkAtoms::image)
     301               0 :       rv = aStream->Write8(XBLBinding_Serialize_Image);
     302               0 :     else if (curr->mType == nsGkAtoms::stylesheet)
     303               0 :       rv = aStream->Write8(XBLBinding_Serialize_Stylesheet);
     304                 :     else
     305               0 :       continue;
     306                 : 
     307               0 :     NS_ENSURE_SUCCESS(rv, rv);
     308                 : 
     309               0 :     rv = aStream->WriteWStringZ(curr->mSrc.get());
     310               0 :     NS_ENSURE_SUCCESS(rv, rv);
     311                 :   }
     312                 : 
     313               0 :   return NS_OK;
     314            4392 : }

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