/* static */ void
ActiveLayerTracker::NotifyOffsetRestyle(nsIFrame* aFrame)
{
LayerActivity* layerActivity = GetLayerActivityForUpdate(aFrame);
IncrementMutationCount(&layerActivity->mLeftRestyleCount);
IncrementMutationCount(&layerActivity->mTopRestyleCount);
IncrementMutationCount(&layerActivity->mRightRestyleCount);
IncrementMutationCount(&layerActivity->mBottomRestyleCount);
}
/* static */ void
ActiveLayerTracker::NotifyOffsetRestyle(nsIFrame* aFrame)
{
LayerActivity* layerActivity = GetLayerActivityForUpdate(aFrame);
IncrementMutationCount(&layerActivity->mRestyleCounts[LayerActivity::ACTIVITY_LEFT]);
IncrementMutationCount(&layerActivity->mRestyleCounts[LayerActivity::ACTIVITY_TOP]);
IncrementMutationCount(&layerActivity->mRestyleCounts[LayerActivity::ACTIVITY_RIGHT]);
IncrementMutationCount(&layerActivity->mRestyleCounts[LayerActivity::ACTIVITY_BOTTOM]);
}
/* static */ void
ActiveLayerTracker::NotifyRestyle(nsIFrame* aFrame, nsCSSProperty aProperty)
{
LayerActivity* layerActivity = GetLayerActivityForUpdate(aFrame);
uint8_t& mutationCount = layerActivity->RestyleCountForProperty(aProperty);
IncrementMutationCount(&mutationCount);
}
/* static */ void
ActiveLayerTracker::NotifyRestyle(nsIFrame* aFrame, nsCSSProperty aProperty)
{
LayerActivity* layerActivity = GetLayerActivityForUpdate(aFrame);
uint8_t& mutationCount = layerActivity->RestyleCountForProperty(aProperty);
IncrementMutationCount(&mutationCount);
if (aProperty == eCSSProperty_transform) {
IncrementScaleRestyleCountIfNeeded(aFrame, layerActivity);
}
}
static void
IncrementScaleRestyleCountIfNeeded(nsIFrame* aFrame, LayerActivity* aActivity)
{
const nsStyleDisplay* display = aFrame->StyleDisplay();
if (!display->mSpecifiedTransform) {
// The transform was removed.
aActivity->mPreviousTransformScale = Nothing();
IncrementMutationCount(&aActivity->mScaleRestyleCount);
return;
}
// Compute the new scale due to the CSS transform property.
nsPresContext* presContext = aFrame->PresContext();
RuleNodeCacheConditions dummy;
nsStyleTransformMatrix::TransformReferenceBox refBox(aFrame);
Matrix4x4 transform =
nsStyleTransformMatrix::ReadTransforms(display->mSpecifiedTransform->mHead,
aFrame->StyleContext(),
presContext,
dummy, refBox,
presContext->AppUnitsPerCSSPixel());
Matrix transform2D;
if (!transform.Is2D(&transform2D)) {
// We don't attempt to handle 3D transforms; just assume the scale changed.
aActivity->mPreviousTransformScale = Nothing();
IncrementMutationCount(&aActivity->mScaleRestyleCount);
return;
}
gfxSize scale = ThebesMatrix(transform2D).ScaleFactors(true);
if (aActivity->mPreviousTransformScale == Some(scale)) {
return; // Nothing changed.
}
aActivity->mPreviousTransformScale = Some(scale);
IncrementMutationCount(&aActivity->mScaleRestyleCount);
}