gecko/image/SVGDocumentWrapper.cpp
Cameron McCormack bc3d82ad01 Bug 968923 - part 3a - add core DOM use counter functionality; r=smaug
This patch gives ns{I,}Document the ability to track use counters and
also to send those to telemetry at document destruction time.  We push
things to telemetry lazily because we're can't definitively say whether
something has been used until the document is torn down.
2015-06-03 12:39:18 -04:00

432 lines
12 KiB
C++

/* -*- 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/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"
// 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()
{
nsIDocument* doc = mViewer->GetDocument();
return doc && doc->HasAnimationController() &&
doc->GetAnimationController()->HasRegisteredAnimations();
}
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->SetImagesNeedAnimating(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->SetImagesNeedAnimating(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 **/
/* void onDataAvailable (in nsIRequest request, in nsISupports ctxt,
in nsIInputStream inStr, in unsigned long sourceOffset,
in unsigned long count); */
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;
}
/* void onStopRequest (in nsIRequest request, in nsISupports ctxt,
in nsresult status); */
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);
nsCOMPtr<nsIParser> parser = do_QueryInterface(listener);
NS_ENSURE_TRUE(parser, NS_ERROR_UNEXPECTED);
// XML-only, because this is for SVG content
nsIContentSink* sink = parser->GetContentSink();
nsCOMPtr<nsIXMLContentSink> xmlSink = do_QueryInterface(sink);
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