void RenderGeometryMap::mapToContainer(TransformState& transformState, const RenderLayerModelObject* container) const
{
// If the mapping includes something like columns, we have to go via renderers.
if (hasNonUniformStep()) {
m_mapping.last().m_renderer->mapLocalToContainer(container, transformState, ApplyContainerFlip | m_mapCoordinatesFlags);
transformState.flatten();
return;
}
bool inFixed = false;
#if !ASSERT_DISABLED
bool foundContainer = !container || (m_mapping.size() && m_mapping[0].m_renderer == container);
#endif
for (int i = m_mapping.size() - 1; i >= 0; --i) {
const RenderGeometryMapStep& currentStep = m_mapping[i];
// If container is the root RenderView (step 0) we want to apply its fixed position offset.
if (i > 0 && currentStep.m_renderer == container) {
#if !ASSERT_DISABLED
foundContainer = true;
#endif
break;
}
// If this box has a transform, it acts as a fixed position container
// for fixed descendants, which prevents the propagation of 'fixed'
// unless the layer itself is also fixed position.
if (i && currentStep.m_hasTransform && !currentStep.m_isFixedPosition)
inFixed = false;
else if (currentStep.m_isFixedPosition)
inFixed = true;
ASSERT(!i == isTopmostRenderView(currentStep.m_renderer));
if (!i) {
// A null container indicates mapping through the root RenderView, so including its transform (the page scale).
if (!container && currentStep.m_transform)
transformState.applyTransform(*currentStep.m_transform.get());
} else {
TransformState::TransformAccumulation accumulate = currentStep.m_accumulatingTransform ? TransformState::AccumulateTransform : TransformState::FlattenTransform;
if (currentStep.m_transform)
transformState.applyTransform(*currentStep.m_transform.get(), accumulate);
else
transformState.move(currentStep.m_offset.width(), currentStep.m_offset.height(), accumulate);
}
if (inFixed && !currentStep.m_offsetForFixedPosition.isZero()) {
ASSERT(currentStep.m_renderer->isRenderView());
transformState.move(currentStep.m_offsetForFixedPosition);
}
}
ASSERT(foundContainer);
transformState.flatten();
}
void RenderGeometryMap::pushMappingsToAncestor(const RenderObject* renderer, const RenderLayerModelObject* ancestorRenderer)
{
// We need to push mappings in reverse order here, so do insertions rather than appends.
TemporaryChange<size_t> positionChange(m_insertionPosition, m_mapping.size());
do {
renderer = renderer->pushMappingToContainer(ancestorRenderer, *this);
} while (renderer && renderer != ancestorRenderer);
ASSERT(m_mapping.isEmpty() || isTopmostRenderView(m_mapping[0].m_renderer));
}
void RenderGeometryMap::mapToContainer(TransformState& transformState,
const RenderBox* container) const {
// If the mapping includes something like columns, we have to go via
// renderers.
if (hasNonUniformStep()) {
m_mapping.last().m_renderer->mapLocalToContainer(
container, transformState, ApplyContainerFlip | m_mapCoordinatesFlags);
transformState.flatten();
return;
}
#if ENABLE(ASSERT)
bool foundContainer =
!container || (m_mapping.size() && m_mapping[0].m_renderer == container);
#endif
for (int i = m_mapping.size() - 1; i >= 0; --i) {
const RenderGeometryMapStep& currentStep = m_mapping[i];
// If container is the root RenderView (step 0) we want to apply its fixed
// position offset.
if (i > 0 && currentStep.m_renderer == container) {
#if ENABLE(ASSERT)
foundContainer = true;
#endif
break;
}
ASSERT(!i == isTopmostRenderView(currentStep.m_renderer));
if (!i) {
// A null container indicates mapping through the root RenderView, so
// including its transform (the page scale).
if (!container && currentStep.m_transform)
transformState.applyTransform(*currentStep.m_transform.get());
} else {
TransformState::TransformAccumulation accumulate =
currentStep.m_accumulatingTransform
? TransformState::AccumulateTransform
: TransformState::FlattenTransform;
if (currentStep.m_transform)
transformState.applyTransform(*currentStep.m_transform.get(),
accumulate);
else
transformState.move(currentStep.m_offset.width(),
currentStep.m_offset.height(), accumulate);
}
}
ASSERT(foundContainer);
transformState.flatten();
}