LCOV - code coverage report
Current view: directory - content/xml/document/src - nsXMLPrettyPrinter.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 116 0 0.0 %
Date: 2012-06-02 Functions: 15 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       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.org 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) 2002
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Jonas Sicking <jonas@sicking.cc> (Original author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * 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 "nsXMLPrettyPrinter.h"
      40                 : #include "nsContentUtils.h"
      41                 : #include "nsIDOMCSSStyleDeclaration.h"
      42                 : #include "nsIDOMDocumentXBL.h"
      43                 : #include "nsIObserver.h"
      44                 : #include "nsIXSLTProcessor.h"
      45                 : #include "nsSyncLoadService.h"
      46                 : #include "nsPIDOMWindow.h"
      47                 : #include "nsIDOMElement.h"
      48                 : #include "nsIDOMDocument.h"
      49                 : #include "nsIServiceManager.h"
      50                 : #include "nsNetUtil.h"
      51                 : #include "mozilla/dom/Element.h"
      52                 : #include "nsIDOMDocumentFragment.h"
      53                 : #include "nsBindingManager.h"
      54                 : #include "nsIScriptSecurityManager.h"
      55                 : #include "mozilla/Preferences.h"
      56                 : 
      57                 : using namespace mozilla;
      58                 : using namespace mozilla::dom;
      59                 : 
      60               0 : NS_IMPL_ISUPPORTS2(nsXMLPrettyPrinter,
      61                 :                    nsIDocumentObserver,
      62                 :                    nsIMutationObserver)
      63                 : 
      64               0 : nsXMLPrettyPrinter::nsXMLPrettyPrinter() : mDocument(nsnull),
      65                 :                                            mUpdateDepth(0),
      66               0 :                                            mUnhookPending(false)
      67                 : {
      68               0 : }
      69                 : 
      70               0 : nsXMLPrettyPrinter::~nsXMLPrettyPrinter()
      71                 : {
      72               0 :     NS_ASSERTION(!mDocument, "we shouldn't be referencing the document still");
      73               0 : }
      74                 : 
      75                 : nsresult
      76               0 : nsXMLPrettyPrinter::PrettyPrint(nsIDocument* aDocument,
      77                 :                                 bool* aDidPrettyPrint)
      78                 : {
      79               0 :     *aDidPrettyPrint = false;
      80                 :     
      81                 :     // Check for iframe with display:none. Such iframes don't have presshells
      82               0 :     if (!aDocument->GetShell()) {
      83               0 :         return NS_OK;
      84                 :     }
      85                 : 
      86                 :     // check if we're in an invisible iframe
      87               0 :     nsPIDOMWindow *internalWin = aDocument->GetWindow();
      88               0 :     nsCOMPtr<nsIDOMElement> frameElem;
      89               0 :     if (internalWin) {
      90               0 :         internalWin->GetFrameElement(getter_AddRefs(frameElem));
      91                 :     }
      92                 : 
      93               0 :     if (frameElem) {
      94               0 :         nsCOMPtr<nsIDOMCSSStyleDeclaration> computedStyle;
      95               0 :         nsCOMPtr<nsIDOMDocument> frameOwnerDoc;
      96               0 :         frameElem->GetOwnerDocument(getter_AddRefs(frameOwnerDoc));
      97               0 :         if (frameOwnerDoc) {
      98               0 :             nsCOMPtr<nsIDOMWindow> window;
      99               0 :             frameOwnerDoc->GetDefaultView(getter_AddRefs(window));
     100               0 :             if (window) {
     101               0 :                 window->GetComputedStyle(frameElem,
     102               0 :                                          EmptyString(),
     103               0 :                                          getter_AddRefs(computedStyle));
     104                 :             }
     105                 :         }
     106                 : 
     107               0 :         if (computedStyle) {
     108               0 :             nsAutoString visibility;
     109               0 :             computedStyle->GetPropertyValue(NS_LITERAL_STRING("visibility"),
     110               0 :                                             visibility);
     111               0 :             if (!visibility.EqualsLiteral("visible")) {
     112                 : 
     113               0 :                 return NS_OK;
     114                 :             }
     115                 :         }
     116                 :     }
     117                 : 
     118                 :     // check the pref
     119               0 :     if (!Preferences::GetBool("layout.xml.prettyprint", true)) {
     120               0 :         return NS_OK;
     121                 :     }
     122                 : 
     123                 :     // Ok, we should prettyprint. Let's do it!
     124               0 :     *aDidPrettyPrint = true;
     125               0 :     nsresult rv = NS_OK;
     126                 : 
     127                 :     // Load the XSLT
     128               0 :     nsCOMPtr<nsIURI> xslUri;
     129               0 :     rv = NS_NewURI(getter_AddRefs(xslUri),
     130               0 :                    NS_LITERAL_CSTRING("chrome://global/content/xml/XMLPrettyPrint.xsl"));
     131               0 :     NS_ENSURE_SUCCESS(rv, rv);
     132                 : 
     133               0 :     nsCOMPtr<nsIDOMDocument> xslDocument;
     134                 :     rv = nsSyncLoadService::LoadDocument(xslUri, nsnull, nsnull, true,
     135               0 :                                          getter_AddRefs(xslDocument));
     136               0 :     NS_ENSURE_SUCCESS(rv, rv);
     137                 : 
     138                 :     // Transform the document
     139                 :     nsCOMPtr<nsIXSLTProcessor> transformer =
     140               0 :         do_CreateInstance("@mozilla.org/document-transformer;1?type=xslt", &rv);
     141               0 :     NS_ENSURE_SUCCESS(rv, rv);
     142                 : 
     143               0 :     rv = transformer->ImportStylesheet(xslDocument);
     144               0 :     NS_ENSURE_SUCCESS(rv, rv);
     145                 : 
     146               0 :     nsCOMPtr<nsIDOMDocumentFragment> resultFragment;
     147               0 :     nsCOMPtr<nsIDOMDocument> sourceDocument = do_QueryInterface(aDocument);
     148               0 :     rv = transformer->TransformToFragment(sourceDocument, sourceDocument,
     149               0 :                                           getter_AddRefs(resultFragment));
     150               0 :     NS_ENSURE_SUCCESS(rv, rv);
     151                 : 
     152                 :     // Add the binding
     153               0 :     nsCOMPtr<nsIDOMDocumentXBL> xblDoc = do_QueryInterface(aDocument);
     154               0 :     NS_ASSERTION(xblDoc, "xml document doesn't implement nsIDOMDocumentXBL");
     155               0 :     NS_ENSURE_TRUE(xblDoc, NS_ERROR_FAILURE);
     156                 : 
     157               0 :     nsCOMPtr<nsIURI> bindingUri;
     158               0 :     rv = NS_NewURI(getter_AddRefs(bindingUri),
     159               0 :         NS_LITERAL_STRING("chrome://global/content/xml/XMLPrettyPrint.xml#prettyprint"));
     160               0 :     NS_ENSURE_SUCCESS(rv, rv);
     161                 :     
     162               0 :     nsCOMPtr<nsIPrincipal> sysPrincipal;
     163               0 :     nsContentUtils::GetSecurityManager()->
     164               0 :         GetSystemPrincipal(getter_AddRefs(sysPrincipal));
     165                 :     aDocument->BindingManager()->LoadBindingDocument(aDocument, bindingUri,
     166               0 :                                                      sysPrincipal);
     167                 : 
     168               0 :     nsCOMPtr<nsIContent> rootCont = aDocument->GetRootElement();
     169               0 :     NS_ENSURE_TRUE(rootCont, NS_ERROR_UNEXPECTED);
     170                 : 
     171                 :     rv = aDocument->BindingManager()->AddLayeredBinding(rootCont, bindingUri,
     172               0 :                                                         sysPrincipal);
     173               0 :     NS_ENSURE_SUCCESS(rv, rv);
     174                 : 
     175                 :     // Hand the result document to the binding
     176               0 :     nsCOMPtr<nsIObserver> binding;
     177                 :     aDocument->BindingManager()->GetBindingImplementation(rootCont,
     178                 :                                               NS_GET_IID(nsIObserver),
     179               0 :                                               (void**)getter_AddRefs(binding));
     180               0 :     NS_ASSERTION(binding, "Prettyprint binding doesn't implement nsIObserver");
     181               0 :     NS_ENSURE_TRUE(binding, NS_ERROR_UNEXPECTED);
     182                 :     
     183               0 :     rv = binding->Observe(resultFragment, "prettyprint-dom-created",
     184               0 :                           EmptyString().get());
     185               0 :     NS_ENSURE_SUCCESS(rv, rv);
     186                 : 
     187                 :     // Observe the document so we know when to switch to "normal" view
     188               0 :     aDocument->AddObserver(this);
     189               0 :     mDocument = aDocument;
     190                 : 
     191               0 :     NS_ADDREF_THIS();
     192                 : 
     193               0 :     return NS_OK;
     194                 : }
     195                 : 
     196                 : void
     197               0 : nsXMLPrettyPrinter::MaybeUnhook(nsIContent* aContent)
     198                 : {
     199                 :     // If there either aContent is null (the document-node was modified) or
     200                 :     // there isn't a binding parent we know it's non-anonymous content.
     201               0 :     if ((!aContent || !aContent->GetBindingParent()) && !mUnhookPending) {
     202                 :         // Can't blindly to mUnhookPending after AddScriptRunner,
     203                 :         // since AddScriptRunner _could_ in theory run us
     204                 :         // synchronously
     205               0 :         mUnhookPending = true;
     206                 :         nsContentUtils::AddScriptRunner(
     207               0 :           NS_NewRunnableMethod(this, &nsXMLPrettyPrinter::Unhook));
     208                 :     }
     209               0 : }
     210                 : 
     211                 : void
     212               0 : nsXMLPrettyPrinter::Unhook()
     213                 : {
     214               0 :     mDocument->RemoveObserver(this);
     215               0 :     nsCOMPtr<nsIDOMDocument> document = do_QueryInterface(mDocument);
     216               0 :     nsCOMPtr<nsIDOMElement> rootElem;
     217               0 :     document->GetDocumentElement(getter_AddRefs(rootElem));
     218                 : 
     219               0 :     if (rootElem) {
     220               0 :         nsCOMPtr<nsIDOMDocumentXBL> xblDoc = do_QueryInterface(mDocument);
     221               0 :         xblDoc->RemoveBinding(rootElem,
     222               0 :                               NS_LITERAL_STRING("chrome://global/content/xml/XMLPrettyPrint.xml#prettyprint"));
     223                 :     }
     224                 : 
     225               0 :     mDocument = nsnull;
     226                 : 
     227               0 :     NS_RELEASE_THIS();
     228               0 : }
     229                 : 
     230                 : void
     231               0 : nsXMLPrettyPrinter::AttributeChanged(nsIDocument* aDocument,
     232                 :                                      Element* aElement,
     233                 :                                      PRInt32 aNameSpaceID,
     234                 :                                      nsIAtom* aAttribute,
     235                 :                                      PRInt32 aModType)
     236                 : {
     237               0 :     MaybeUnhook(aElement);
     238               0 : }
     239                 : 
     240                 : void
     241               0 : nsXMLPrettyPrinter::ContentAppended(nsIDocument* aDocument,
     242                 :                                     nsIContent* aContainer,
     243                 :                                     nsIContent* aFirstNewContent,
     244                 :                                     PRInt32 aNewIndexInContainer)
     245                 : {
     246               0 :     MaybeUnhook(aContainer);
     247               0 : }
     248                 : 
     249                 : void
     250               0 : nsXMLPrettyPrinter::ContentInserted(nsIDocument* aDocument,
     251                 :                                     nsIContent* aContainer,
     252                 :                                     nsIContent* aChild,
     253                 :                                     PRInt32 aIndexInContainer)
     254                 : {
     255               0 :     MaybeUnhook(aContainer);
     256               0 : }
     257                 : 
     258                 : void
     259               0 : nsXMLPrettyPrinter::ContentRemoved(nsIDocument* aDocument,
     260                 :                                    nsIContent* aContainer,
     261                 :                                    nsIContent* aChild,
     262                 :                                    PRInt32 aIndexInContainer,
     263                 :                                    nsIContent* aPreviousSibling)
     264                 : {
     265               0 :     MaybeUnhook(aContainer);
     266               0 : }
     267                 : 
     268                 : void
     269               0 : nsXMLPrettyPrinter::NodeWillBeDestroyed(const nsINode* aNode)
     270                 : {
     271               0 :     mDocument = nsnull;
     272               0 :     NS_RELEASE_THIS();
     273               0 : }
     274                 : 
     275                 : 
     276               0 : nsresult NS_NewXMLPrettyPrinter(nsXMLPrettyPrinter** aPrinter)
     277                 : {
     278               0 :     *aPrinter = new nsXMLPrettyPrinter;
     279               0 :     NS_ENSURE_TRUE(*aPrinter, NS_ERROR_OUT_OF_MEMORY);
     280               0 :     NS_ADDREF(*aPrinter);
     281               0 :     return NS_OK;
     282                 : }

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