root/Source/core/animation/css/CSSPendingAnimations.cpp

DEFINITIONS

1. add
2. startPendingAnimations
3. notifyCompositorAnimationStarted

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#include "config.h"
#include "core/animation/css/CSSPendingAnimations.h"

#include "core/animation/Animation.h"
#include "core/animation/DocumentTimeline.h"
#include "core/frame/FrameView.h"
#include "core/rendering/RenderLayer.h"

namespace WebCore {

void CSSPendingAnimations::add(AnimationPlayer* player)
{
    ASSERT(player->source()->isAnimation());
    m_pending.append(player);
}

bool CSSPendingAnimations::startPendingAnimations()
{
    bool startedOnCompositor = false;
    for (size_t i = 0; i < m_pending.size(); ++i) {
        if (m_pending[i]->maybeStartAnimationOnCompositor())
            startedOnCompositor = true;
    }

    // If any animations were started on the compositor, all remaining
    // need to wait for a synchronized start time. Otherwise they may
    // start immediately.
    if (startedOnCompositor) {
        for (size_t i = 0; i < m_pending.size(); ++i)
            m_waitingForCompositorAnimationStart.append(m_pending[i]);
    } else {
        for (size_t i = 0; i < m_pending.size(); ++i) {
            m_pending[i]->setStartTime(m_pending[i]->timeline()->currentTime());
            m_pending[i]->update(AnimationPlayer::UpdateOnDemand);
        }
    }
    m_pending.clear();

    if (startedOnCompositor || m_waitingForCompositorAnimationStart.isEmpty())
        return !m_waitingForCompositorAnimationStart.isEmpty();

    // Check if we're still waiting for any compositor animations to start.
    for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
        if (m_waitingForCompositorAnimationStart[i].get()->hasActiveAnimationsOnCompositor())
            return true;
    }

    // If not, go ahead and start any animations that were waiting.
    notifyCompositorAnimationStarted(monotonicallyIncreasingTime());
    return false;
}

void CSSPendingAnimations::notifyCompositorAnimationStarted(double monotonicAnimationStartTime)
{
    for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
        AnimationPlayer* player = m_waitingForCompositorAnimationStart[i].get();
        player->setStartTime(monotonicAnimationStartTime - player->timeline()->zeroTime());
        player->update(AnimationPlayer::UpdateOnDemand);
    }

    m_waitingForCompositorAnimationStart.clear();
}

} // namespace