зеркало из https://github.com/mozilla/pjs.git
706 строки
24 KiB
C++
706 строки
24 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SMIL module.
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*
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* The Initial Developer of the Original Code is Brian Birtles.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Birtles <birtles@gmail.com>
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* Daniel Holbert <dholbert@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsSMILAnimationController.h"
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#include "nsSMILCompositor.h"
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#include "nsSMILCSSProperty.h"
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#include "nsCSSProps.h"
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#include "nsComponentManagerUtils.h"
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#include "nsITimer.h"
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#include "nsIContent.h"
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#include "mozilla/dom/Element.h"
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#include "nsIDocument.h"
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#include "nsISMILAnimationElement.h"
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#include "nsIDOMSVGAnimationElement.h"
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#include "nsSMILTimedElement.h"
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using namespace mozilla::dom;
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//----------------------------------------------------------------------
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// nsSMILAnimationController implementation
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// Helper method
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static nsRefreshDriver*
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GetRefreshDriverForDoc(nsIDocument* aDoc)
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{
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nsIPresShell* shell = aDoc->GetPrimaryShell();
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if (!shell) {
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return nsnull;
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}
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nsPresContext* context = shell->GetPresContext();
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return context ? context->RefreshDriver() : nsnull;
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}
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//----------------------------------------------------------------------
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// ctors, dtors, factory methods
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nsSMILAnimationController::nsSMILAnimationController()
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: mResampleNeeded(PR_FALSE),
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mDeferredStartSampling(PR_FALSE),
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mDocument(nsnull)
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{
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mAnimationElementTable.Init();
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mChildContainerTable.Init();
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}
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nsSMILAnimationController::~nsSMILAnimationController()
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{
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StopSampling(GetRefreshDriverForDoc(mDocument));
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NS_ASSERTION(mAnimationElementTable.Count() == 0,
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"Animation controller shouldn't be tracking any animation"
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" elements when it dies");
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}
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nsSMILAnimationController* NS_NewSMILAnimationController(nsIDocument* aDoc)
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{
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nsSMILAnimationController* animationController =
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new nsSMILAnimationController();
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NS_ENSURE_TRUE(animationController, nsnull);
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nsresult rv = animationController->Init(aDoc);
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if (NS_FAILED(rv)) {
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delete animationController;
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animationController = nsnull;
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}
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return animationController;
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}
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nsresult
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nsSMILAnimationController::Init(nsIDocument* aDoc)
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{
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NS_ENSURE_ARG_POINTER(aDoc);
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// Keep track of document, so we can traverse its set of animation elements
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mDocument = aDoc;
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Begin();
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return NS_OK;
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}
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//----------------------------------------------------------------------
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// nsSMILTimeContainer methods:
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void
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nsSMILAnimationController::Pause(PRUint32 aType)
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{
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nsSMILTimeContainer::Pause(aType);
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if (mPauseState) {
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StopSampling(GetRefreshDriverForDoc(mDocument));
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}
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}
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void
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nsSMILAnimationController::Resume(PRUint32 aType)
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{
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PRBool wasPaused = (mPauseState != 0);
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nsSMILTimeContainer::Resume(aType);
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if (wasPaused && !mPauseState && mChildContainerTable.Count()) {
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Sample(); // Run the first sample manually
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if (mAnimationElementTable.Count()) {
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StartSampling(GetRefreshDriverForDoc(mDocument));
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} else {
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mDeferredStartSampling = PR_TRUE;
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}
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}
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}
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nsSMILTime
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nsSMILAnimationController::GetParentTime() const
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{
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// Our parent time is wallclock time
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return PR_Now() / PR_USEC_PER_MSEC;
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}
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//----------------------------------------------------------------------
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// nsARefreshObserver methods:
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NS_IMPL_ADDREF(nsSMILAnimationController)
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NS_IMPL_RELEASE(nsSMILAnimationController)
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// nsRefreshDriver Callback function
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void
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nsSMILAnimationController::WillRefresh(mozilla::TimeStamp aTime)
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{
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// XXXdholbert Eventually we should be sampling based on aTime. For now,
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// though, we keep track of the time on our own, and we just use
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// nsRefreshDriver for scheduling samples.
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Sample();
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}
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//----------------------------------------------------------------------
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// Animation element registration methods:
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void
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nsSMILAnimationController::RegisterAnimationElement(
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nsISMILAnimationElement* aAnimationElement)
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{
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mAnimationElementTable.PutEntry(aAnimationElement);
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if (mDeferredStartSampling) {
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// mAnimationElementTable was empty until we just inserted its first element
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NS_ABORT_IF_FALSE(mAnimationElementTable.Count() == 1,
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"we shouldn't have deferred sampling if we already had "
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"animations registered");
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mDeferredStartSampling = PR_FALSE;
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StartSampling(GetRefreshDriverForDoc(mDocument));
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}
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}
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void
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nsSMILAnimationController::UnregisterAnimationElement(
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nsISMILAnimationElement* aAnimationElement)
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{
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mAnimationElementTable.RemoveEntry(aAnimationElement);
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}
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//----------------------------------------------------------------------
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// Page show/hide
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void
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nsSMILAnimationController::OnPageShow()
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{
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Resume(nsSMILTimeContainer::PAUSE_PAGEHIDE);
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}
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void
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nsSMILAnimationController::OnPageHide()
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{
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Pause(nsSMILTimeContainer::PAUSE_PAGEHIDE);
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}
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//----------------------------------------------------------------------
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// Cycle-collection support
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void
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nsSMILAnimationController::Traverse(
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nsCycleCollectionTraversalCallback* aCallback)
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{
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// Traverse last compositor table
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if (mLastCompositorTable) {
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mLastCompositorTable->EnumerateEntries(CompositorTableEntryTraverse,
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aCallback);
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}
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}
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/*static*/ PR_CALLBACK PLDHashOperator
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nsSMILAnimationController::CompositorTableEntryTraverse(
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nsSMILCompositor* aCompositor,
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void* aArg)
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{
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nsCycleCollectionTraversalCallback* cb =
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static_cast<nsCycleCollectionTraversalCallback*>(aArg);
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aCompositor->Traverse(cb);
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return PL_DHASH_NEXT;
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}
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void
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nsSMILAnimationController::Unlink()
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{
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mLastCompositorTable = nsnull;
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}
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//----------------------------------------------------------------------
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// Timer-related implementation helpers
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void
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nsSMILAnimationController::StartSampling(nsRefreshDriver* aRefreshDriver)
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{
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NS_ASSERTION(mPauseState == 0, "Starting sampling but controller is paused");
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if (aRefreshDriver) {
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NS_ABORT_IF_FALSE(!GetRefreshDriverForDoc(mDocument) ||
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aRefreshDriver == GetRefreshDriverForDoc(mDocument),
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"Starting sampling with wrong refresh driver");
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aRefreshDriver->AddRefreshObserver(this, Flush_Style);
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}
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}
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void
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nsSMILAnimationController::StopSampling(nsRefreshDriver* aRefreshDriver)
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{
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if (aRefreshDriver) {
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// NOTE: The document might already have been detached from its PresContext
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// (and RefreshDriver), which would make GetRefreshDriverForDoc return null.
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NS_ABORT_IF_FALSE(!GetRefreshDriverForDoc(mDocument) ||
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aRefreshDriver == GetRefreshDriverForDoc(mDocument),
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"Stopping sampling with wrong refresh driver");
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aRefreshDriver->RemoveRefreshObserver(this, Flush_Style);
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}
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}
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//----------------------------------------------------------------------
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// Sample-related methods and callbacks
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PR_CALLBACK PLDHashOperator
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TransferCachedBaseValue(nsSMILCompositor* aCompositor,
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void* aData)
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{
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nsSMILCompositorTable* lastCompositorTable =
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static_cast<nsSMILCompositorTable*>(aData);
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nsSMILCompositor* lastCompositor =
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lastCompositorTable->GetEntry(aCompositor->GetKey());
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if (lastCompositor) {
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aCompositor->StealCachedBaseValue(lastCompositor);
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}
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return PL_DHASH_NEXT;
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}
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PR_CALLBACK PLDHashOperator
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RemoveCompositorFromTable(nsSMILCompositor* aCompositor,
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void* aData)
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{
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nsSMILCompositorTable* lastCompositorTable =
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static_cast<nsSMILCompositorTable*>(aData);
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lastCompositorTable->RemoveEntry(aCompositor->GetKey());
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return PL_DHASH_NEXT;
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}
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PR_CALLBACK PLDHashOperator
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DoClearAnimationEffects(nsSMILCompositor* aCompositor,
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void* /*aData*/)
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{
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aCompositor->ClearAnimationEffects();
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return PL_DHASH_NEXT;
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}
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PR_CALLBACK PLDHashOperator
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DoComposeAttribute(nsSMILCompositor* aCompositor,
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void* /*aData*/)
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{
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aCompositor->ComposeAttribute();
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return PL_DHASH_NEXT;
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}
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void
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nsSMILAnimationController::DoSample()
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{
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DoSample(PR_TRUE); // Skip unchanged time containers
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}
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void
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nsSMILAnimationController::DoSample(PRBool aSkipUnchangedContainers)
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{
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// Reset resample flag
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mResampleNeeded = PR_FALSE;
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// STEP 1: Bring model up to date
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DoMilestoneSamples();
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// STEP 2: Sample the child time containers
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//
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// When we sample the child time containers they will simply record the sample
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// time in document time.
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TimeContainerHashtable activeContainers;
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activeContainers.Init(mChildContainerTable.Count());
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SampleTimeContainerParams tcParams = { &activeContainers,
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aSkipUnchangedContainers };
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mChildContainerTable.EnumerateEntries(SampleTimeContainer, &tcParams);
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// STEP 3: (i) Sample the timed elements AND
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// (ii) Create a table of compositors
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//
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// (i) Here we sample the timed elements (fetched from the
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// nsISMILAnimationElements) which determine from the active time if the
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// element is active and what its simple time etc. is. This information is
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// then passed to its time client (nsSMILAnimationFunction).
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//
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// (ii) During the same loop we also build up a table that contains one
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// compositor for each animated attribute and which maps animated elements to
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// the corresponding compositor for their target attribute.
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//
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// Note that this compositor table needs to be allocated on the heap so we can
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// store it until the next sample. This lets us find out which elements were
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// animated in sample 'n-1' but not in sample 'n' (and hence need to have
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// their animation effects removed in sample 'n').
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//
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// Parts (i) and (ii) are not functionally related but we combine them here to
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// save iterating over the animation elements twice.
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// Create the compositor table
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nsAutoPtr<nsSMILCompositorTable>
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currentCompositorTable(new nsSMILCompositorTable());
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if (!currentCompositorTable)
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return;
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currentCompositorTable->Init(0);
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SampleAnimationParams saParams = { &activeContainers,
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currentCompositorTable };
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mAnimationElementTable.EnumerateEntries(SampleAnimation,
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&saParams);
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activeContainers.Clear();
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// STEP 4: Compare previous sample's compositors against this sample's.
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// (Transfer cached base values across, & remove animation effects from
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// no-longer-animated targets.)
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if (mLastCompositorTable) {
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// * Transfer over cached base values, from last sample's compositors
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currentCompositorTable->EnumerateEntries(TransferCachedBaseValue,
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mLastCompositorTable);
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// * For each compositor in current sample's hash table, remove entry from
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// prev sample's hash table -- we don't need to clear animation
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// effects of those compositors, since they're still being animated.
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currentCompositorTable->EnumerateEntries(RemoveCompositorFromTable,
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mLastCompositorTable);
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// * For each entry that remains in prev sample's hash table (i.e. for
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// every target that's no longer animated), clear animation effects.
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mLastCompositorTable->EnumerateEntries(DoClearAnimationEffects, nsnull);
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}
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// STEP 5: Compose currently-animated attributes.
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// XXXdholbert: This step traverses our animation targets in an effectively
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// random order. For animation from/to 'inherit' values to work correctly
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// when the inherited value is *also* being animated, we really should be
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// traversing our animated nodes in an ancestors-first order (bug 501183)
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currentCompositorTable->EnumerateEntries(DoComposeAttribute, nsnull);
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// Update last compositor table
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mLastCompositorTable = currentCompositorTable.forget();
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NS_ASSERTION(!mResampleNeeded, "Resample dirty flag set during sample!");
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}
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void
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nsSMILAnimationController::DoMilestoneSamples()
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{
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// We need to sample the timing model but because SMIL operates independently
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// of the frame-rate, we can get one sample at t=0s and the next at t=10min.
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//
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// In between those two sample times a whole string of significant events
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// might be expected to take place: events firing, new interdependencies
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// between animations resolved and dissolved, etc.
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//
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// Furthermore, at any given time, we want to sample all the intervals that
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// end at that time BEFORE any that begin. This behaviour is implied by SMIL's
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// endpoint-exclusive timing model.
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//
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// So we have the animations (specifically the timed elements) register the
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// next significant moment (called a milestone) in their lifetime and then we
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// step through the model at each of these moments and sample those animations
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// registered for those times. This way events can fire in the correct order,
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// dependencies can be resolved etc.
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nsSMILTime sampleTime = LL_MININT;
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while (PR_TRUE) {
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// We want to find any milestones AT OR BEFORE the current sample time so we
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// initialise the next milestone to the moment after (1ms after, to be
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// precise) the current sample time and see if there are any milestones
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// before that. Any other milestones will be dealt with in a subsequent
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// sample.
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nsSMILMilestone nextMilestone(GetCurrentTime() + 1, PR_TRUE);
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mChildContainerTable.EnumerateEntries(GetNextMilestone, &nextMilestone);
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if (nextMilestone.mTime > GetCurrentTime()) {
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break;
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}
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GetMilestoneElementsParams params;
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params.mMilestone = nextMilestone;
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mChildContainerTable.EnumerateEntries(GetMilestoneElements, ¶ms);
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PRUint32 length = params.mElements.Length();
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// During the course of a sampling we don't want to actually go backwards.
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// Due to negative offsets, early ends and the like, a timed element might
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// register a milestone that is actually in the past. That's fine, but it's
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// still only going to get *sampled* with whatever time we're up to and no
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// earlier.
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//
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// Because we're only performing this clamping at the last moment, the
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// animations will still all get sampled in the correct order and
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// dependencies will be appropriately resolved.
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sampleTime = PR_MAX(nextMilestone.mTime, sampleTime);
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for (PRUint32 i = 0; i < length; ++i) {
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nsISMILAnimationElement* elem = params.mElements[i].get();
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NS_ABORT_IF_FALSE(elem, "NULL animation element in list");
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nsSMILTimeContainer* container = elem->GetTimeContainer();
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if (!container)
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// The container may be nsnull if the element has been detached from its
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// parent since registering a milestone.
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continue;
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nsSMILTimeValue containerTimeValue =
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container->ParentToContainerTime(sampleTime);
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if (!containerTimeValue.IsResolved())
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continue;
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// Clamp the converted container time to non-negative values.
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nsSMILTime containerTime = PR_MAX(0, containerTimeValue.GetMillis());
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if (nextMilestone.mIsEnd) {
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elem->TimedElement().SampleEndAt(containerTime);
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} else {
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elem->TimedElement().SampleAt(containerTime);
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}
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}
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}
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}
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/*static*/ PR_CALLBACK PLDHashOperator
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nsSMILAnimationController::GetNextMilestone(TimeContainerPtrKey* aKey,
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void* aData)
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{
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NS_ABORT_IF_FALSE(aKey, "Null hash key for time container hash table");
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NS_ABORT_IF_FALSE(aKey->GetKey(), "Null time container key in hash table");
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NS_ABORT_IF_FALSE(aData,
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"Null data pointer during time container enumeration");
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nsSMILMilestone* nextMilestone = static_cast<nsSMILMilestone*>(aData);
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nsSMILTimeContainer* container = aKey->GetKey();
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if (container->IsPausedByType(nsSMILTimeContainer::PAUSE_BEGIN))
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return PL_DHASH_NEXT;
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nsSMILMilestone thisMilestone;
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PRBool didGetMilestone =
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container->GetNextMilestoneInParentTime(thisMilestone);
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if (didGetMilestone && thisMilestone < *nextMilestone) {
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*nextMilestone = thisMilestone;
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}
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return PL_DHASH_NEXT;
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}
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/*static*/ PR_CALLBACK PLDHashOperator
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nsSMILAnimationController::GetMilestoneElements(TimeContainerPtrKey* aKey,
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void* aData)
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{
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NS_ABORT_IF_FALSE(aKey, "Null hash key for time container hash table");
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NS_ABORT_IF_FALSE(aKey->GetKey(), "Null time container key in hash table");
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NS_ABORT_IF_FALSE(aData,
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"Null data pointer during time container enumeration");
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GetMilestoneElementsParams* params =
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static_cast<GetMilestoneElementsParams*>(aData);
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nsSMILTimeContainer* container = aKey->GetKey();
|
|
if (container->IsPausedByType(nsSMILTimeContainer::PAUSE_BEGIN))
|
|
return PL_DHASH_NEXT;
|
|
|
|
container->PopMilestoneElementsAtMilestone(params->mMilestone,
|
|
params->mElements);
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
/*static*/ PR_CALLBACK PLDHashOperator
|
|
nsSMILAnimationController::SampleTimeContainer(TimeContainerPtrKey* aKey,
|
|
void* aData)
|
|
{
|
|
NS_ENSURE_TRUE(aKey, PL_DHASH_NEXT);
|
|
NS_ENSURE_TRUE(aKey->GetKey(), PL_DHASH_NEXT);
|
|
NS_ENSURE_TRUE(aData, PL_DHASH_NEXT);
|
|
|
|
SampleTimeContainerParams* params =
|
|
static_cast<SampleTimeContainerParams*>(aData);
|
|
|
|
nsSMILTimeContainer* container = aKey->GetKey();
|
|
if (!container->IsPausedByType(nsSMILTimeContainer::PAUSE_BEGIN) &&
|
|
(container->NeedsSample() || !params->mSkipUnchangedContainers)) {
|
|
container->ClearMilestones();
|
|
container->Sample();
|
|
params->mActiveContainers->PutEntry(container);
|
|
}
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
/*static*/ PR_CALLBACK PLDHashOperator
|
|
nsSMILAnimationController::SampleAnimation(AnimationElementPtrKey* aKey,
|
|
void* aData)
|
|
{
|
|
NS_ENSURE_TRUE(aKey, PL_DHASH_NEXT);
|
|
NS_ENSURE_TRUE(aKey->GetKey(), PL_DHASH_NEXT);
|
|
NS_ENSURE_TRUE(aData, PL_DHASH_NEXT);
|
|
|
|
nsISMILAnimationElement* animElem = aKey->GetKey();
|
|
SampleAnimationParams* params = static_cast<SampleAnimationParams*>(aData);
|
|
|
|
SampleTimedElement(animElem, params->mActiveContainers);
|
|
AddAnimationToCompositorTable(animElem, params->mCompositorTable);
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
/*static*/ void
|
|
nsSMILAnimationController::SampleTimedElement(
|
|
nsISMILAnimationElement* aElement, TimeContainerHashtable* aActiveContainers)
|
|
{
|
|
nsSMILTimeContainer* timeContainer = aElement->GetTimeContainer();
|
|
if (!timeContainer)
|
|
return;
|
|
|
|
// We'd like to call timeContainer->NeedsSample() here and skip all timed
|
|
// elements that belong to paused time containers that don't need a sample,
|
|
// but that doesn't work because we've already called Sample() on all the time
|
|
// containers so the paused ones don't need a sample any more and they'll
|
|
// return false.
|
|
//
|
|
// Instead we build up a hashmap of active time containers during the previous
|
|
// step (SampleTimeContainer) and then test here if the container for this
|
|
// timed element is in the list.
|
|
if (!aActiveContainers->GetEntry(timeContainer))
|
|
return;
|
|
|
|
nsSMILTime containerTime = timeContainer->GetCurrentTime();
|
|
|
|
aElement->TimedElement().SampleAt(containerTime);
|
|
}
|
|
|
|
/*static*/ void
|
|
nsSMILAnimationController::AddAnimationToCompositorTable(
|
|
nsISMILAnimationElement* aElement, nsSMILCompositorTable* aCompositorTable)
|
|
{
|
|
// Add a compositor to the hash table if there's not already one there
|
|
nsSMILTargetIdentifier key;
|
|
if (!GetTargetIdentifierForAnimation(aElement, key))
|
|
// Something's wrong/missing about animation's target; skip this animation
|
|
return;
|
|
|
|
nsSMILAnimationFunction& func = aElement->AnimationFunction();
|
|
|
|
// Only add active animation functions. If there are no active animations
|
|
// targeting an attribute, no compositor will be created and any previously
|
|
// applied animations will be cleared.
|
|
if (func.IsActiveOrFrozen()) {
|
|
// Look up the compositor for our target, & add our animation function
|
|
// to its list of animation functions.
|
|
nsSMILCompositor* result = aCompositorTable->PutEntry(key);
|
|
result->AddAnimationFunction(&func);
|
|
|
|
} else if (func.HasChanged()) {
|
|
// Look up the compositor for our target, and force it to skip the
|
|
// "nothing's changed so don't bother compositing" optimization for this
|
|
// sample. |func| is inactive, but it's probably *newly* inactive (since
|
|
// it's got HasChanged() == PR_TRUE), so we need to make sure to recompose
|
|
// its target.
|
|
nsSMILCompositor* result = aCompositorTable->PutEntry(key);
|
|
result->ToggleForceCompositing();
|
|
|
|
// We've now made sure that |func|'s inactivity will be reflected as of
|
|
// this sample. We need to clear its HasChanged() flag so that it won't
|
|
// trigger this same clause in future samples (until it changes again).
|
|
func.ClearHasChanged();
|
|
}
|
|
}
|
|
|
|
// Helper function that, given a nsISMILAnimationElement, looks up its target
|
|
// element & target attribute and populates a nsSMILTargetIdentifier
|
|
// for this target.
|
|
/*static*/ PRBool
|
|
nsSMILAnimationController::GetTargetIdentifierForAnimation(
|
|
nsISMILAnimationElement* aAnimElem, nsSMILTargetIdentifier& aResult)
|
|
{
|
|
// Look up target (animated) element
|
|
Element* targetElem = aAnimElem->GetTargetElementContent();
|
|
if (!targetElem)
|
|
// Animation has no target elem -- skip it.
|
|
return PR_FALSE;
|
|
|
|
// Look up target (animated) attribute
|
|
//
|
|
// XXXdholbert As mentioned in SMILANIM section 3.1, attributeName may
|
|
// have an XMLNS prefix to indicate the XML namespace. Need to parse
|
|
// that somewhere.
|
|
nsIAtom* attributeName = aAnimElem->GetTargetAttributeName();
|
|
if (!attributeName)
|
|
// Animation has no target attr -- skip it.
|
|
return PR_FALSE;
|
|
|
|
// Look up target (animated) attribute-type
|
|
nsSMILTargetAttrType attributeType = aAnimElem->GetTargetAttributeType();
|
|
|
|
// Check if an 'auto' attributeType refers to a CSS property or XML attribute.
|
|
// Note that SMIL requires we search for CSS properties first. So if they
|
|
// overlap, 'auto' = 'CSS'. (SMILANIM 3.1)
|
|
PRBool isCSS;
|
|
if (attributeType == eSMILTargetAttrType_auto) {
|
|
nsCSSProperty prop =
|
|
nsCSSProps::LookupProperty(nsDependentAtomString(attributeName));
|
|
isCSS = nsSMILCSSProperty::IsPropertyAnimatable(prop);
|
|
} else {
|
|
isCSS = (attributeType == eSMILTargetAttrType_CSS);
|
|
}
|
|
|
|
// Construct the key
|
|
aResult.mElement = targetElem;
|
|
aResult.mAttributeName = attributeName;
|
|
aResult.mIsCSS = isCSS;
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Add/remove child time containers
|
|
|
|
nsresult
|
|
nsSMILAnimationController::AddChild(nsSMILTimeContainer& aChild)
|
|
{
|
|
TimeContainerPtrKey* key = mChildContainerTable.PutEntry(&aChild);
|
|
NS_ENSURE_TRUE(key,NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
if (!mPauseState && mChildContainerTable.Count() == 1) {
|
|
Sample(); // Run the first sample manually
|
|
if (mAnimationElementTable.Count()) {
|
|
StartSampling(GetRefreshDriverForDoc(mDocument));
|
|
} else {
|
|
mDeferredStartSampling = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsSMILAnimationController::RemoveChild(nsSMILTimeContainer& aChild)
|
|
{
|
|
mChildContainerTable.RemoveEntry(&aChild);
|
|
|
|
if (!mPauseState && mChildContainerTable.Count() == 0) {
|
|
StopSampling(GetRefreshDriverForDoc(mDocument));
|
|
}
|
|
}
|