The Tor Browser: content/xml/document/src/nsXMLPrettyPrinter.cpp@6474c204b198 (annotated)

content/xml/document/src/nsXMLPrettyPrinter.cpp@6474c204b198 (annotated)

content/xml/document/src/nsXMLPrettyPrinter.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "nsXMLPrettyPrinter.h"
 #include "nsContentUtils.h"
 #include "nsIDOMCSSStyleDeclaration.h"
 #include "nsIDOMDocumentXBL.h"
 #include "nsIObserver.h"
 #include "nsIXSLTProcessor.h"
 #include "nsSyncLoadService.h"
 #include "nsPIDOMWindow.h"
 #include "nsIDOMElement.h"
 #include "nsIDOMDocument.h"
 #include "nsIServiceManager.h"
 #include "nsNetUtil.h"
 #include "mozilla/dom/Element.h"
 #include "nsIDOMDocumentFragment.h"
 #include "nsBindingManager.h"
 #include "nsXBLService.h"
 #include "nsIScriptSecurityManager.h"
 #include "mozilla/Preferences.h"
 #include "nsIDocument.h"
 #include "nsVariant.h"
 #include "nsIDOMCustomEvent.h"
 #include "GeneratedEvents.h"
 using namespace mozilla;
 using namespace mozilla::dom;
 NS_IMPL_ISUPPORTS(nsXMLPrettyPrinter,
                   nsIDocumentObserver,
                   nsIMutationObserver)
 nsXMLPrettyPrinter::nsXMLPrettyPrinter() : mDocument(nullptr),
                                            mUnhookPending(false)
 {
 }
 nsXMLPrettyPrinter::~nsXMLPrettyPrinter()
 {
     NS_ASSERTION(!mDocument, "we shouldn't be referencing the document still");
 }
 nsresult
 nsXMLPrettyPrinter::PrettyPrint(nsIDocument* aDocument,
                                 bool* aDidPrettyPrint)
 {
     *aDidPrettyPrint = false;
     // Check for iframe with display:none. Such iframes don't have presshells
     if (!aDocument->GetShell()) {
         return NS_OK;
     }
     // check if we're in an invisible iframe
     nsPIDOMWindow *internalWin = aDocument->GetWindow();
     nsCOMPtr<nsIDOMElement> frameElem;
     if (internalWin) {
         internalWin->GetFrameElement(getter_AddRefs(frameElem));
     }
     if (frameElem) {
         nsCOMPtr<nsIDOMCSSStyleDeclaration> computedStyle;
         nsCOMPtr<nsIDOMDocument> frameOwnerDoc;
         frameElem->GetOwnerDocument(getter_AddRefs(frameOwnerDoc));
         if (frameOwnerDoc) {
             nsCOMPtr<nsIDOMWindow> window;
             frameOwnerDoc->GetDefaultView(getter_AddRefs(window));
             if (window) {
                 window->GetComputedStyle(frameElem,
                                          EmptyString(),
                                          getter_AddRefs(computedStyle));
             }
         }
         if (computedStyle) {
             nsAutoString visibility;
             computedStyle->GetPropertyValue(NS_LITERAL_STRING("visibility"),
                                             visibility);
             if (!visibility.EqualsLiteral("visible")) {
                 return NS_OK;
             }
         }
     }
     // check the pref
     if (!Preferences::GetBool("layout.xml.prettyprint", true)) {
         return NS_OK;
     }
     // Ok, we should prettyprint. Let's do it!
     *aDidPrettyPrint = true;
     nsresult rv = NS_OK;
     // Load the XSLT
     nsCOMPtr<nsIURI> xslUri;
     rv = NS_NewURI(getter_AddRefs(xslUri),
                    NS_LITERAL_CSTRING("chrome://global/content/xml/XMLPrettyPrint.xsl"));
     NS_ENSURE_SUCCESS(rv, rv);
     nsCOMPtr<nsIDOMDocument> xslDocument;
     rv = nsSyncLoadService::LoadDocument(xslUri, nullptr, nullptr, true,
                                          getter_AddRefs(xslDocument));
     NS_ENSURE_SUCCESS(rv, rv);
     // Transform the document
     nsCOMPtr<nsIXSLTProcessor> transformer =
         do_CreateInstance("@mozilla.org/document-transformer;1?type=xslt", &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = transformer->ImportStylesheet(xslDocument);
     NS_ENSURE_SUCCESS(rv, rv);
     nsCOMPtr<nsIDOMDocumentFragment> resultFragment;
     nsCOMPtr<nsIDOMDocument> sourceDocument = do_QueryInterface(aDocument);
     rv = transformer->TransformToFragment(sourceDocument, sourceDocument,
                                           getter_AddRefs(resultFragment));
     NS_ENSURE_SUCCESS(rv, rv);
     //
     // Apply the prettprint XBL binding.
     //
     // We take some shortcuts here. In particular, we don't bother invoking the
     // contstructor (since the binding has no constructor), and we don't bother
     // calling LoadBindingDocument because it's a chrome:// URI and thus will get
     // sync loaded no matter what.
     //
     // Grab the XBL service.
     nsXBLService* xblService = nsXBLService::GetInstance();
     NS_ENSURE_TRUE(xblService, NS_ERROR_NOT_AVAILABLE);
     // Compute the binding URI.
     nsCOMPtr<nsIURI> bindingUri;
     rv = NS_NewURI(getter_AddRefs(bindingUri),
         NS_LITERAL_STRING("chrome://global/content/xml/XMLPrettyPrint.xml#prettyprint"));
     NS_ENSURE_SUCCESS(rv, rv);
     // Compute the bound element.
     nsCOMPtr<nsIContent> rootCont = aDocument->GetRootElement();
     NS_ENSURE_TRUE(rootCont, NS_ERROR_UNEXPECTED);
     // Grab the system principal.
     nsCOMPtr<nsIPrincipal> sysPrincipal;
     nsContentUtils::GetSecurityManager()->
         GetSystemPrincipal(getter_AddRefs(sysPrincipal));
     // Load the bindings.
     nsRefPtr<nsXBLBinding> unused;
     bool ignored;
     rv = xblService->LoadBindings(rootCont, bindingUri, sysPrincipal,
                                   getter_AddRefs(unused), &ignored);
     NS_ENSURE_SUCCESS(rv, rv);
     // Fire an event at the bound element to pass it |resultFragment|.
     nsCOMPtr<nsIDOMEvent> domEvent;
     rv = NS_NewDOMCustomEvent(getter_AddRefs(domEvent), rootCont,
                               nullptr, nullptr);
     NS_ENSURE_SUCCESS(rv, rv);
     nsCOMPtr<nsIDOMCustomEvent> customEvent = do_QueryInterface(domEvent);
     MOZ_ASSERT(customEvent);
     nsCOMPtr<nsIWritableVariant> resultFragmentVariant = new nsVariant();
     rv = resultFragmentVariant->SetAsISupports(resultFragment);
     MOZ_ASSERT(NS_SUCCEEDED(rv));
     rv = customEvent->InitCustomEvent(NS_LITERAL_STRING("prettyprint-dom-created"),
                                       /* bubbles = */ false, /* cancelable = */ false,
                                       /* detail = */ resultFragmentVariant);
     NS_ENSURE_SUCCESS(rv, rv);
     customEvent->SetTrusted(true);
     bool dummy;
     rv = rootCont->DispatchEvent(domEvent, &dummy);
     NS_ENSURE_SUCCESS(rv, rv);
     // Observe the document so we know when to switch to "normal" view
     aDocument->AddObserver(this);
     mDocument = aDocument;
     NS_ADDREF_THIS();
     return NS_OK;
 }
 void
 nsXMLPrettyPrinter::MaybeUnhook(nsIContent* aContent)
 {
     // If there either aContent is null (the document-node was modified) or
     // there isn't a binding parent we know it's non-anonymous content.
     if ((!aContent || !aContent->GetBindingParent()) && !mUnhookPending) {
         // Can't blindly to mUnhookPending after AddScriptRunner,
         // since AddScriptRunner _could_ in theory run us
         // synchronously
         mUnhookPending = true;
         nsContentUtils::AddScriptRunner(
           NS_NewRunnableMethod(this, &nsXMLPrettyPrinter::Unhook));
     }
 }
 void
 nsXMLPrettyPrinter::Unhook()
 {
     mDocument->RemoveObserver(this);
     nsCOMPtr<Element> element = mDocument->GetDocumentElement();
     if (element) {
         mDocument->BindingManager()->ClearBinding(element);
     }
     mDocument = nullptr;
     NS_RELEASE_THIS();
 }
 void
 nsXMLPrettyPrinter::AttributeChanged(nsIDocument* aDocument,
                                      Element* aElement,
                                      int32_t aNameSpaceID,
                                      nsIAtom* aAttribute,
                                      int32_t aModType)
 {
     MaybeUnhook(aElement);
 }
 void
 nsXMLPrettyPrinter::ContentAppended(nsIDocument* aDocument,
                                     nsIContent* aContainer,
                                     nsIContent* aFirstNewContent,
                                     int32_t aNewIndexInContainer)
 {
     MaybeUnhook(aContainer);
 }
 void
 nsXMLPrettyPrinter::ContentInserted(nsIDocument* aDocument,
                                     nsIContent* aContainer,
                                     nsIContent* aChild,
                                     int32_t aIndexInContainer)
 {
     MaybeUnhook(aContainer);
 }
 void
 nsXMLPrettyPrinter::ContentRemoved(nsIDocument* aDocument,
                                    nsIContent* aContainer,
                                    nsIContent* aChild,
                                    int32_t aIndexInContainer,
                                    nsIContent* aPreviousSibling)
 {
     MaybeUnhook(aContainer);
 }
 void
 nsXMLPrettyPrinter::NodeWillBeDestroyed(const nsINode* aNode)
 {
     mDocument = nullptr;
     NS_RELEASE_THIS();
 }
 nsresult NS_NewXMLPrettyPrinter(nsXMLPrettyPrinter** aPrinter)
 {
     *aPrinter = new nsXMLPrettyPrinter;
     NS_ADDREF(*aPrinter);
     return NS_OK;
 }

The Tor Browser / annotate

content/xml/document/src/nsXMLPrettyPrinter.cpp@6474c204b198 (annotated)

content/xml/document/src/nsXMLPrettyPrinter.cpp