chromium/src/third_party/blink/renderer/core/layout/svg/layout_svg_model_object.cc

/*
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#include "third_party/blink/renderer/core/layout/svg/layout_svg_model_object.h"

#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/layout/svg/layout_svg_container.h"
#include "third_party/blink/renderer/core/layout/svg/layout_svg_resource_container.h"
#include "third_party/blink/renderer/core/layout/svg/svg_layout_support.h"
#include "third_party/blink/renderer/core/layout/svg/svg_resources.h"
#include "third_party/blink/renderer/core/paint/compositing/compositing_reason_finder.h"
#include "third_party/blink/renderer/core/svg/svg_graphics_element.h"

namespace blink {

LayoutSVGModelObject::LayoutSVGModelObject(SVGElement* node)
    : LayoutObject(node) {}

bool LayoutSVGModelObject::IsChildAllowed(LayoutObject* child,
                                          const ComputedStyle&) const {
  NOT_DESTROYED();
  return child->IsSVG() && !(child->IsSVGInline() || child->IsSVGInlineText());
}

void LayoutSVGModelObject::MapLocalToAncestor(
    const LayoutBoxModelObject* ancestor,
    TransformState& transform_state,
    MapCoordinatesFlags flags) const {
  NOT_DESTROYED();
  SVGLayoutSupport::MapLocalToAncestor(this, ancestor, transform_state, flags);
}

PhysicalRect LayoutSVGModelObject::VisualRectInDocument(
    VisualRectFlags flags) const {
  NOT_DESTROYED();
  return SVGLayoutSupport::VisualRectInAncestorSpace(*this, *View(), flags);
}

void LayoutSVGModelObject::MapAncestorToLocal(
    const LayoutBoxModelObject* ancestor,
    TransformState& transform_state,
    MapCoordinatesFlags flags) const {
  NOT_DESTROYED();
  SVGLayoutSupport::MapAncestorToLocal(*this, ancestor, transform_state, flags);
}

const LayoutObject* LayoutSVGModelObject::PushMappingToContainer(
    const LayoutBoxModelObject* ancestor_to_stop_at,
    LayoutGeometryMap& geometry_map) const {
  NOT_DESTROYED();
  return SVGLayoutSupport::PushMappingToContainer(this, ancestor_to_stop_at,
                                                  geometry_map);
}

void LayoutSVGModelObject::AbsoluteQuads(Vector<FloatQuad>& quads,
                                         MapCoordinatesFlags mode) const {
  NOT_DESTROYED();
  quads.push_back(LocalToAbsoluteQuad(StrokeBoundingBox(), mode));
}

// This method is called from inside PaintOutline(), and since we call
// PaintOutline() while transformed to our coord system, return local coords.
void LayoutSVGModelObject::AddOutlineRects(Vector<PhysicalRect>& rects,
                                           const PhysicalOffset&,
                                           NGOutlineType) const {
  NOT_DESTROYED();
  FloatRect visual_rect = VisualRectInLocalSVGCoordinates();
  bool was_empty = visual_rect.IsEmpty();
  SVGLayoutSupport::AdjustWithClipPathAndMask(*this, ObjectBoundingBox(),
                                              visual_rect);
  // If visual rect is clipped away then don't add it.
  if (!was_empty && visual_rect.IsEmpty())
    return;
  rects.push_back(PhysicalRect::EnclosingRect(visual_rect));
}

FloatRect LayoutSVGModelObject::LocalBoundingBoxRectForAccessibility() const {
  NOT_DESTROYED();
  return StrokeBoundingBox();
}

void LayoutSVGModelObject::WillBeDestroyed() {
  NOT_DESTROYED();
  SVGResources::ClearClipPathFilterMask(*GetElement(), Style());
  LayoutObject::WillBeDestroyed();
}

AffineTransform LayoutSVGModelObject::CalculateLocalTransform() const {
  NOT_DESTROYED();
  auto* element = GetElement();
  if (element->HasTransform(SVGElement::kIncludeMotionTransform))
    return element->CalculateTransform(SVGElement::kIncludeMotionTransform);
  return AffineTransform();
}

bool LayoutSVGModelObject::CheckForImplicitTransformChange(
    bool bbox_changed) const {
  NOT_DESTROYED();
  // If the transform is relative to the reference box, check relevant
  // conditions to see if we need to recompute the transform.
  switch (StyleRef().TransformBox()) {
    case ETransformBox::kViewBox:
      return SVGLayoutSupport::LayoutSizeOfNearestViewportChanged(this);
    case ETransformBox::kFillBox:
      return bbox_changed;
  }
  NOTREACHED();
  return false;
}

void LayoutSVGModelObject::StyleDidChange(StyleDifference diff,
                                          const ComputedStyle* old_style) {
  NOT_DESTROYED();
  LayoutObject::StyleDidChange(diff, old_style);

  if (diff.NeedsFullLayout()) {
    SetNeedsBoundariesUpdate();
    if (diff.TransformChanged())
      SetNeedsTransformUpdate();
  }

  SetHasTransformRelatedProperty(StyleRef().HasTransformRelatedProperty());

  SVGResources::UpdateClipPathFilterMask(*GetElement(), old_style, StyleRef());

  if (!Parent())
    return;
  if (diff.BlendModeChanged() && !IsSVGHiddenContainer()) {
    DCHECK(IsBlendingAllowed());
    Parent()->DescendantIsolationRequirementsChanged(
        StyleRef().HasBlendMode() ? kDescendantIsolationRequired
                                  : kDescendantIsolationNeedsUpdate);
  }
  if (diff.CompositingReasonsChanged())
    SVGLayoutSupport::NotifySVGRootOfChangedCompositingReasons(this);
  if (diff.HasDifference())
    LayoutSVGResourceContainer::StyleChanged(*this, diff);
}

void LayoutSVGModelObject::InsertedIntoTree() {
  NOT_DESTROYED();
  LayoutObject::InsertedIntoTree();
  LayoutSVGResourceContainer::MarkForLayoutAndParentResourceInvalidation(*this,
                                                                         false);
  if (StyleRef().HasSVGEffect())
    SetNeedsPaintPropertyUpdate();
  if (CompositingReasonFinder::DirectReasonsForSVGChildPaintProperties(*this) !=
      CompositingReason::kNone) {
    SVGLayoutSupport::NotifySVGRootOfChangedCompositingReasons(this);
  }
}

void LayoutSVGModelObject::WillBeRemovedFromTree() {
  NOT_DESTROYED();
  LayoutSVGResourceContainer::MarkForLayoutAndParentResourceInvalidation(*this,
                                                                         false);
  if (StyleRef().HasSVGEffect())
    SetNeedsPaintPropertyUpdate();
  LayoutObject::WillBeRemovedFromTree();
  if (CompositingReasonFinder::DirectReasonsForSVGChildPaintProperties(*this) !=
      CompositingReason::kNone) {
    SVGLayoutSupport::NotifySVGRootOfChangedCompositingReasons(this);
  }
}

}  // namespace blink