Add m-esr52 at 52.6.0

1 files changed, 460 insertions, 0 deletions

diff --git a/image/SVGDocumentWrapper.cpp b/image/SVGDocumentWrapper.cpp
new file mode 100644
index 000000000..d4b71b907
--- /dev/null
+++ b/image/SVGDocumentWrapper.cpp
@@ -0,0 +1,460 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "SVGDocumentWrapper.h"
+
+#include "mozilla/dom/DocumentTimeline.h"
+#include "mozilla/dom/Element.h"
+#include "nsICategoryManager.h"
+#include "nsIChannel.h"
+#include "nsIContentViewer.h"
+#include "nsIDocument.h"
+#include "nsIDocumentLoaderFactory.h"
+#include "nsIDOMSVGLength.h"
+#include "nsIHttpChannel.h"
+#include "nsIObserverService.h"
+#include "nsIParser.h"
+#include "nsIPresShell.h"
+#include "nsIRequest.h"
+#include "nsIStreamListener.h"
+#include "nsIXMLContentSink.h"
+#include "nsNetCID.h"
+#include "nsComponentManagerUtils.h"
+#include "nsSMILAnimationController.h"
+#include "nsServiceManagerUtils.h"
+#include "mozilla/dom/SVGSVGElement.h"
+#include "nsSVGEffects.h"
+#include "mozilla/dom/SVGAnimatedLength.h"
+#include "nsMimeTypes.h"
+#include "DOMSVGLength.h"
+#include "nsDocument.h"
+#include "mozilla/dom/ImageTracker.h"
+
+// undef the GetCurrentTime macro defined in WinBase.h from the MS Platform SDK
+#undef GetCurrentTime
+
+namespace mozilla {
+
+using namespace dom;
+using namespace gfx;
+
+namespace image {
+
+NS_IMPL_ISUPPORTS(SVGDocumentWrapper,
+                  nsIStreamListener,
+                  nsIRequestObserver,
+                  nsIObserver,
+                  nsISupportsWeakReference)
+
+SVGDocumentWrapper::SVGDocumentWrapper()
+  : mIgnoreInvalidation(false),
+    mRegisteredForXPCOMShutdown(false)
+{ }
+
+SVGDocumentWrapper::~SVGDocumentWrapper()
+{
+  DestroyViewer();
+  if (mRegisteredForXPCOMShutdown) {
+    UnregisterForXPCOMShutdown();
+  }
+}
+
+void
+SVGDocumentWrapper::DestroyViewer()
+{
+  if (mViewer) {
+    mViewer->GetDocument()->OnPageHide(false, nullptr);
+    mViewer->Close(nullptr);
+    mViewer->Destroy();
+    mViewer = nullptr;
+  }
+}
+
+nsIFrame*
+SVGDocumentWrapper::GetRootLayoutFrame()
+{
+  Element* rootElem = GetRootSVGElem();
+  return rootElem ? rootElem->GetPrimaryFrame() : nullptr;
+}
+
+void
+SVGDocumentWrapper::UpdateViewportBounds(const nsIntSize& aViewportSize)
+{
+  MOZ_ASSERT(!mIgnoreInvalidation, "shouldn't be reentrant");
+  mIgnoreInvalidation = true;
+
+  nsIntRect currentBounds;
+  mViewer->GetBounds(currentBounds);
+
+  // If the bounds have changed, we need to do a layout flush.
+  if (currentBounds.Size() != aViewportSize) {
+    mViewer->SetBounds(IntRect(IntPoint(0, 0), aViewportSize));
+    FlushLayout();
+  }
+
+  mIgnoreInvalidation = false;
+}
+
+void
+SVGDocumentWrapper::FlushImageTransformInvalidation()
+{
+  MOZ_ASSERT(!mIgnoreInvalidation, "shouldn't be reentrant");
+
+  SVGSVGElement* svgElem = GetRootSVGElem();
+  if (!svgElem) {
+    return;
+  }
+
+  mIgnoreInvalidation = true;
+  svgElem->FlushImageTransformInvalidation();
+  FlushLayout();
+  mIgnoreInvalidation = false;
+}
+
+bool
+SVGDocumentWrapper::IsAnimated()
+{
+  // Can be called for animated images during shutdown, after we've
+  // already Observe()'d XPCOM shutdown and cleared out our mViewer pointer.
+  if (!mViewer) {
+    return false;
+  }
+
+  nsIDocument* doc = mViewer->GetDocument();
+  if (!doc) {
+    return false;
+  }
+  if (doc->Timeline()->HasAnimations()) {
+    // CSS animations (technically HasAnimations() also checks for CSS
+    // transitions and Web animations but since SVG-as-an-image doesn't run
+    // script they will never run in the document that we wrap).
+    return true;
+  }
+  if (doc->HasAnimationController() &&
+      doc->GetAnimationController()->HasRegisteredAnimations()) {
+    // SMIL animations
+    return true;
+  }
+  return false;
+}
+
+void
+SVGDocumentWrapper::StartAnimation()
+{
+  // Can be called for animated images during shutdown, after we've
+  // already Observe()'d XPCOM shutdown and cleared out our mViewer pointer.
+  if (!mViewer) {
+    return;
+  }
+
+  nsIDocument* doc = mViewer->GetDocument();
+  if (doc) {
+    nsSMILAnimationController* controller = doc->GetAnimationController();
+    if (controller) {
+      controller->Resume(nsSMILTimeContainer::PAUSE_IMAGE);
+    }
+    doc->ImageTracker()->SetAnimatingState(true);
+  }
+}
+
+void
+SVGDocumentWrapper::StopAnimation()
+{
+  // Can be called for animated images during shutdown, after we've
+  // already Observe()'d XPCOM shutdown and cleared out our mViewer pointer.
+  if (!mViewer) {
+    return;
+  }
+
+  nsIDocument* doc = mViewer->GetDocument();
+  if (doc) {
+    nsSMILAnimationController* controller = doc->GetAnimationController();
+    if (controller) {
+      controller->Pause(nsSMILTimeContainer::PAUSE_IMAGE);
+    }
+    doc->ImageTracker()->SetAnimatingState(false);
+  }
+}
+
+void
+SVGDocumentWrapper::ResetAnimation()
+{
+  SVGSVGElement* svgElem = GetRootSVGElem();
+  if (!svgElem) {
+    return;
+  }
+
+  svgElem->SetCurrentTime(0.0f);
+}
+
+float
+SVGDocumentWrapper::GetCurrentTime()
+{
+  SVGSVGElement* svgElem = GetRootSVGElem();
+  return svgElem ? svgElem->GetCurrentTime()
+                 : 0.0f;
+}
+
+void
+SVGDocumentWrapper::SetCurrentTime(float aTime)
+{
+  SVGSVGElement* svgElem = GetRootSVGElem();
+  if (svgElem && svgElem->GetCurrentTime() != aTime) {
+    svgElem->SetCurrentTime(aTime);
+  }
+}
+
+void
+SVGDocumentWrapper::TickRefreshDriver()
+{
+  nsCOMPtr<nsIPresShell> presShell;
+  mViewer->GetPresShell(getter_AddRefs(presShell));
+  if (presShell) {
+    nsPresContext* presContext = presShell->GetPresContext();
+    if (presContext) {
+      presContext->RefreshDriver()->DoTick();
+    }
+  }
+}
+
+/** nsIStreamListener methods **/
+
+NS_IMETHODIMP
+SVGDocumentWrapper::OnDataAvailable(nsIRequest* aRequest, nsISupports* ctxt,
+                                    nsIInputStream* inStr,
+                                    uint64_t sourceOffset,
+                                    uint32_t count)
+{
+  return mListener->OnDataAvailable(aRequest, ctxt, inStr,
+                                    sourceOffset, count);
+}
+
+/** nsIRequestObserver methods **/
+
+NS_IMETHODIMP
+SVGDocumentWrapper::OnStartRequest(nsIRequest* aRequest, nsISupports* ctxt)
+{
+  nsresult rv = SetupViewer(aRequest,
+                            getter_AddRefs(mViewer),
+                            getter_AddRefs(mLoadGroup));
+
+  if (NS_SUCCEEDED(rv) &&
+      NS_SUCCEEDED(mListener->OnStartRequest(aRequest, nullptr))) {
+    mViewer->GetDocument()->SetIsBeingUsedAsImage();
+    StopAnimation(); // otherwise animations start automatically in helper doc
+
+    rv = mViewer->Init(nullptr, nsIntRect(0, 0, 0, 0));
+    if (NS_SUCCEEDED(rv)) {
+      rv = mViewer->Open(nullptr, nullptr);
+    }
+  }
+  return rv;
+}
+
+
+NS_IMETHODIMP
+SVGDocumentWrapper::OnStopRequest(nsIRequest* aRequest, nsISupports* ctxt,
+                                  nsresult status)
+{
+  if (mListener) {
+    mListener->OnStopRequest(aRequest, ctxt, status);
+    mListener = nullptr;
+  }
+
+  return NS_OK;
+}
+
+/** nsIObserver Methods **/
+NS_IMETHODIMP
+SVGDocumentWrapper::Observe(nsISupports* aSubject,
+                            const char* aTopic,
+                            const char16_t* aData)
+{
+  if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
+    // Sever ties from rendering observers to helper-doc's root SVG node
+    SVGSVGElement* svgElem = GetRootSVGElem();
+    if (svgElem) {
+      nsSVGEffects::RemoveAllRenderingObservers(svgElem);
+    }
+
+    // Clean up at XPCOM shutdown time.
+    DestroyViewer();
+    if (mListener) {
+      mListener = nullptr;
+    }
+    if (mLoadGroup) {
+      mLoadGroup = nullptr;
+    }
+
+    // Turn off "registered" flag, or else we'll try to unregister when we die.
+    // (No need for that now, and the try would fail anyway -- it's too late.)
+    mRegisteredForXPCOMShutdown = false;
+  } else {
+    NS_ERROR("Unexpected observer topic.");
+  }
+  return NS_OK;
+}
+
+/** Private helper methods **/
+
+// This method is largely cribbed from
+// nsExternalResourceMap::PendingLoad::SetupViewer.
+nsresult
+SVGDocumentWrapper::SetupViewer(nsIRequest* aRequest,
+                                nsIContentViewer** aViewer,
+                                nsILoadGroup** aLoadGroup)
+{
+  nsCOMPtr<nsIChannel> chan(do_QueryInterface(aRequest));
+  NS_ENSURE_TRUE(chan, NS_ERROR_UNEXPECTED);
+
+  // Check for HTTP error page
+  nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aRequest));
+  if (httpChannel) {
+    bool requestSucceeded;
+    if (NS_FAILED(httpChannel->GetRequestSucceeded(&requestSucceeded)) ||
+        !requestSucceeded) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  // Give this document its own loadgroup
+  nsCOMPtr<nsILoadGroup> loadGroup;
+  chan->GetLoadGroup(getter_AddRefs(loadGroup));
+
+  nsCOMPtr<nsILoadGroup> newLoadGroup =
+        do_CreateInstance(NS_LOADGROUP_CONTRACTID);
+  NS_ENSURE_TRUE(newLoadGroup, NS_ERROR_OUT_OF_MEMORY);
+  newLoadGroup->SetLoadGroup(loadGroup);
+
+  nsCOMPtr<nsICategoryManager> catMan =
+    do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
+  NS_ENSURE_TRUE(catMan, NS_ERROR_NOT_AVAILABLE);
+  nsXPIDLCString contractId;
+  nsresult rv = catMan->GetCategoryEntry("Gecko-Content-Viewers", IMAGE_SVG_XML,
+                                         getter_Copies(contractId));
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory =
+    do_GetService(contractId);
+  NS_ENSURE_TRUE(docLoaderFactory, NS_ERROR_NOT_AVAILABLE);
+
+  nsCOMPtr<nsIContentViewer> viewer;
+  nsCOMPtr<nsIStreamListener> listener;
+  rv = docLoaderFactory->CreateInstance("external-resource", chan,
+                                        newLoadGroup,
+                                        NS_LITERAL_CSTRING(IMAGE_SVG_XML),
+                                        nullptr, nullptr,
+                                        getter_AddRefs(listener),
+                                        getter_AddRefs(viewer));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  NS_ENSURE_TRUE(viewer, NS_ERROR_UNEXPECTED);
+
+  // Create a navigation time object and pass it to the SVG document through
+  // the viewer.
+  // The timeline(DocumentTimeline, used in CSS animation) of this SVG
+  // document needs this navigation timing object for time computation, such
+  // as to calculate current time stamp based on the start time of navigation
+  // time object.
+  //
+  // For a root document, DocShell would do these sort of things
+  // automatically. Since there is no DocShell for this wrapped SVG document,
+  // we must set it up manually.
+  RefPtr<nsDOMNavigationTiming> timing = new nsDOMNavigationTiming();
+  timing->NotifyNavigationStart(nsDOMNavigationTiming::DocShellState::eInactive);
+  viewer->SetNavigationTiming(timing);
+
+  nsCOMPtr<nsIParser> parser = do_QueryInterface(listener);
+  NS_ENSURE_TRUE(parser, NS_ERROR_UNEXPECTED);
+
+  // XML-only, because this is for SVG content
+  nsCOMPtr<nsIContentSink> sink = parser->GetContentSink();
+  NS_ENSURE_TRUE(sink, NS_ERROR_UNEXPECTED);
+
+  listener.swap(mListener);
+  viewer.forget(aViewer);
+  newLoadGroup.forget(aLoadGroup);
+
+  RegisterForXPCOMShutdown();
+  return NS_OK;
+}
+
+void
+SVGDocumentWrapper::RegisterForXPCOMShutdown()
+{
+  MOZ_ASSERT(!mRegisteredForXPCOMShutdown,
+             "re-registering for XPCOM shutdown");
+  // Listen for xpcom-shutdown so that we can drop references to our
+  // helper-document at that point. (Otherwise, we won't get cleaned up
+  // until imgLoader::Shutdown, which can happen after the JAR service
+  // and RDF service have been unregistered.)
+  nsresult rv;
+  nsCOMPtr<nsIObserverService> obsSvc = do_GetService(OBSERVER_SVC_CID, &rv);
+  if (NS_FAILED(rv) ||
+      NS_FAILED(obsSvc->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
+                                    true))) {
+    NS_WARNING("Failed to register as observer of XPCOM shutdown");
+  } else {
+    mRegisteredForXPCOMShutdown = true;
+  }
+}
+
+void
+SVGDocumentWrapper::UnregisterForXPCOMShutdown()
+{
+  MOZ_ASSERT(mRegisteredForXPCOMShutdown,
+             "unregistering for XPCOM shutdown w/out being registered");
+
+  nsresult rv;
+  nsCOMPtr<nsIObserverService> obsSvc = do_GetService(OBSERVER_SVC_CID, &rv);
+  if (NS_FAILED(rv) ||
+      NS_FAILED(obsSvc->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID))) {
+    NS_WARNING("Failed to unregister as observer of XPCOM shutdown");
+  } else {
+    mRegisteredForXPCOMShutdown = false;
+  }
+}
+
+void
+SVGDocumentWrapper::FlushLayout()
+{
+  nsCOMPtr<nsIPresShell> presShell;
+  mViewer->GetPresShell(getter_AddRefs(presShell));
+  if (presShell) {
+    presShell->FlushPendingNotifications(Flush_Layout);
+  }
+}
+
+nsIDocument*
+SVGDocumentWrapper::GetDocument()
+{
+  if (!mViewer) {
+    return nullptr;
+  }
+
+  return mViewer->GetDocument(); // May be nullptr.
+}
+
+SVGSVGElement*
+SVGDocumentWrapper::GetRootSVGElem()
+{
+  if (!mViewer) {
+    return nullptr; // Can happen during destruction
+  }
+
+  nsIDocument* doc = mViewer->GetDocument();
+  if (!doc) {
+    return nullptr; // Can happen during destruction
+  }
+
+  Element* rootElem = mViewer->GetDocument()->GetRootElement();
+  if (!rootElem || !rootElem->IsSVGElement(nsGkAtoms::svg)) {
+    return nullptr;
+  }
+
+  return static_cast<SVGSVGElement*>(rootElem);
+}
+
+} // namespace image
+} // namespace mozilla