Add m-esr52 at 52.6.0

1 files changed, 268 insertions, 0 deletions

diff --git a/dom/xml/nsXMLPrettyPrinter.cpp b/dom/xml/nsXMLPrettyPrinter.cpp
new file mode 100644
index 000000000..2e086dde0
--- /dev/null
+++ b/dom/xml/nsXMLPrettyPrinter.cpp
@@ -0,0 +1,268 @@
+/* -*- 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 "nsICSSDeclaration.h"
+#include "nsIDOMDocumentXBL.h"
+#include "nsIObserver.h"
+#include "nsIXSLTProcessor.h"
+#include "nsSyncLoadService.h"
+#include "nsPIDOMWindow.h"
+#include "nsIDOMElement.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 "mozilla/dom/CustomEvent.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
+    nsPIDOMWindowOuter *internalWin = aDocument->GetWindow();
+    nsCOMPtr<Element> frameElem;
+    if (internalWin) {
+        frameElem = internalWin->GetFrameElementInternal();
+    }
+
+    if (frameElem) {
+        nsCOMPtr<nsICSSDeclaration> computedStyle;
+        if (nsIDocument* frameOwnerDoc = frameElem->OwnerDoc()) {
+            nsPIDOMWindowOuter* window = frameOwnerDoc->GetDefaultView();
+            if (window) {
+                nsCOMPtr<nsPIDOMWindowInner> innerWindow =
+                    window->GetCurrentInnerWindow();
+
+                ErrorResult dummy;
+                computedStyle = innerWindow->GetComputedStyle(*frameElem,
+                                                              EmptyString(),
+                                                              dummy);
+                dummy.SuppressException();
+            }
+        }
+
+        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, nsIContentPolicy::TYPE_XSLT,
+                                         nsContentUtils::GetSystemPrincipal(),
+                                         nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
+                                         nullptr, true, mozilla::net::RP_Default,
+                                         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.
+    RefPtr<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|.
+    RefPtr<CustomEvent> event =
+      NS_NewDOMCustomEvent(rootCont, nullptr, nullptr);
+    MOZ_ASSERT(event);
+    nsCOMPtr<nsIWritableVariant> resultFragmentVariant = new nsVariant();
+    rv = resultFragmentVariant->SetAsISupports(resultFragment);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+    rv = event->InitCustomEvent(NS_LITERAL_STRING("prettyprint-dom-created"),
+                                /* bubbles = */ false, /* cancelable = */ false,
+                                /* detail = */ resultFragmentVariant);
+    NS_ENSURE_SUCCESS(rv, rv);
+    event->SetTrusted(true);
+    bool dummy;
+    rv = rootCont->DispatchEvent(event, &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(
+          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,
+                                     const nsAttrValue* aOldValue)
+{
+    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;
+}