bool ScrollAnimatorNone::scroll(ScrollbarOrientation orientation, ScrollGranularity granularity, float step, float multiplier)
{
if (!m_scrollableArea->scrollAnimatorEnabled())
return ScrollAnimator::scroll(orientation, granularity, step, multiplier);
#if PLATFORM(CHROMIUM)
TRACE_EVENT("ScrollAnimatorNone::scroll", this, 0);
#endif
// FIXME: get the type passed in. MouseWheel could also be by line, but should still have different
// animation parameters than the keyboard.
Parameters parameters;
switch (granularity) {
case ScrollByDocument:
parameters = Parameters(true, 20 * kTickTime, 10 * kTickTime, Cubic, 10 * kTickTime, Cubic, 10 * kTickTime, Linear, 1);
break;
case ScrollByLine:
parameters = Parameters(true, 10 * kTickTime, 7 * kTickTime, Cubic, 3 * kTickTime, Cubic, 3 * kTickTime, Linear, 1);
break;
case ScrollByPage:
parameters = Parameters(true, 15 * kTickTime, 10 * kTickTime, Cubic, 5 * kTickTime, Cubic, 5 * kTickTime, Linear, 1);
break;
case ScrollByPixel:
parameters = Parameters(true, 11 * kTickTime, 2 * kTickTime, Cubic, 3 * kTickTime, Cubic, 3 * kTickTime, Quadratic, 1.25);
break;
case ScrollByPixelVelocity:
// FIXME: Generalize the scroll interface to support a richer set of parameters.
if (m_firstVelocitySet) {
float x = m_firstVelocityIsVertical ? multiplier : m_firstVelocity;
float y = m_firstVelocityIsVertical ? m_firstVelocity : multiplier;
FloatPoint fp(x, y);
fireUpAnAnimation(fp);
m_firstVelocitySet = false;
m_firstVelocityIsVertical = false;
} else {
m_firstVelocitySet = true;
m_firstVelocityIsVertical = orientation == VerticalScrollbar;
m_firstVelocity = multiplier;
}
return true;
}
// If the individual input setting is disabled, bail.
if (!parameters.m_isEnabled)
return ScrollAnimator::scroll(orientation, granularity, step, multiplier);
// This is an animatable scroll. Set the animation in motion using the appropriate parameters.
float scrollableSize = static_cast<float>(m_scrollableArea->scrollSize(orientation));
PerAxisData& data = (orientation == VerticalScrollbar) ? m_verticalData : m_horizontalData;
bool needToScroll = data.updateDataFromParameters(step, multiplier, scrollableSize, WTF::monotonicallyIncreasingTime(), ¶meters);
if (needToScroll && !animationTimerActive()) {
m_startTime = data.m_startTime;
animationTimerFired();
}
return needToScroll;
}
ScrollResultOneDimensional ScrollAnimator::userScroll(ScrollbarOrientation orientation, ScrollGranularity granularity, float step, float delta)
{
if (!m_scrollableArea->scrollAnimatorEnabled())
return ScrollAnimatorBase::userScroll(orientation, granularity, step, delta);
TRACE_EVENT0("blink", "ScrollAnimator::scroll");
// FIXME: get the type passed in. MouseWheel could also be by line, but should still have different
// animation parameters than the keyboard.
Parameters parameters;
switch (granularity) {
case ScrollByDocument:
case ScrollByLine:
case ScrollByPage:
case ScrollByPixel:
parameters = parametersForScrollGranularity(granularity);
break;
case ScrollByPrecisePixel:
return ScrollAnimatorBase::userScroll(orientation, granularity, step, delta);
}
// If the individual input setting is disabled, bail.
if (!parameters.m_isEnabled)
return ScrollAnimatorBase::userScroll(orientation, granularity, step, delta);
// This is an animatable scroll. Set the animation in motion using the appropriate parameters.
float scrollableSize = static_cast<float>(m_scrollableArea->scrollSize(orientation));
PerAxisData& data = (orientation == VerticalScrollbar) ? m_verticalData : m_horizontalData;
bool needToScroll = data.updateDataFromParameters(step, delta, scrollableSize, WTF::monotonicallyIncreasingTime(), ¶meters);
float unusedDelta = needToScroll ? delta - (data.m_desiredPosition - *data.m_currentPosition) : delta;
if (needToScroll && !animationTimerActive()) {
m_startTime = data.m_startTime;
animationWillStart();
animationTimerFired();
scrollableArea()->registerForAnimation();
}
return ScrollResultOneDimensional(needToScroll, unusedDelta);
}
void ScrollAnimatorNone::stopAnimationTimerIfNeeded()
{
if (animationTimerActive())
m_animationActive = false;
}
