void Axis::OverscrollBy(ParentLayerCoord aOverscroll) {
MOZ_ASSERT(CanScroll());
// We can get some spurious calls to OverscrollBy() with near-zero values
// due to rounding error. Ignore those (they might trip the asserts below.)
if (FuzzyEqualsAdditive(aOverscroll.value, 0.0f, COORDINATE_EPSILON)) {
return;
}
EndOverscrollAnimation();
aOverscroll = ApplyResistance(aOverscroll);
if (aOverscroll > 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetCompositionEnd().value, GetPageEnd().value)) {
nsPrintfCString message("composition end (%f) is not equal (within error) to page end (%f)\n",
GetCompositionEnd().value, GetPageEnd().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH("GFX: Overscroll issue > 0");
}
#endif
MOZ_ASSERT(mOverscroll >= 0);
} else if (aOverscroll < 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetOrigin().value, GetPageStart().value)) {
nsPrintfCString message("composition origin (%f) is not equal (within error) to page origin (%f)\n",
GetOrigin().value, GetPageStart().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH("GFX: Overscroll issue < 0");
}
#endif
MOZ_ASSERT(mOverscroll <= 0);
}
mOverscroll += aOverscroll;
}
void Axis::OverscrollBy(ParentLayerCoord aOverscroll) {
MOZ_ASSERT(CanScroll());
StopSamplingOverscrollAnimation();
aOverscroll = ApplyResistance(aOverscroll);
if (aOverscroll > 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetCompositionEnd().value, GetPageEnd().value)) {
nsPrintfCString message("composition end (%f) is not equal (within error) to page end (%f)\n",
GetCompositionEnd().value, GetPageEnd().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH();
}
#endif
MOZ_ASSERT(mOverscroll >= 0);
} else if (aOverscroll < 0) {
#ifdef DEBUG
if (!FuzzyEqualsCoordinate(GetOrigin().value, GetPageStart().value)) {
nsPrintfCString message("composition origin (%f) is not equal (within error) to page origin (%f)\n",
GetOrigin().value, GetPageStart().value);
NS_ASSERTION(false, message.get());
MOZ_CRASH();
}
#endif
MOZ_ASSERT(mOverscroll <= 0);
}
mOverscroll += aOverscroll;
}