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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/paint/fragment_data.h"
#include "third_party/blink/renderer/core/paint/paint_layer.h"
#include "third_party/blink/renderer/platform/graphics/paint/geometry_mapper.h"
namespace blink {
// These are defined here because of PaintLayer dependency.
FragmentData::RareData::RareData() : unique_id(NewUniqueObjectId()) {}
FragmentData::RareData::~RareData() = default;
void FragmentData::DestroyTail() {
if (!rare_data_)
return;
// Take next_fragment_ which clears it in this fragment.
std::unique_ptr<FragmentData> next = std::move(rare_data_->next_fragment_);
while (next && next->rare_data_) {
// Take next_fragment_ which clears it in that fragment, and the assignment
// deletes the previous |next|.
next = std::move(next->rare_data_->next_fragment_);
}
// The last |next| will be deleted on return.
}
FragmentData& FragmentData::EnsureNextFragment() {
if (!NextFragment())
EnsureRareData().next_fragment_ = std::make_unique<FragmentData>();
return *rare_data_->next_fragment_;
}
FragmentData& FragmentData::LastFragment() {
for (FragmentData* fragment = this;;) {
FragmentData* next = fragment->NextFragment();
if (!next)
return *fragment;
fragment = next;
}
}
const FragmentData& FragmentData::LastFragment() const {
return const_cast<FragmentData*>(this)->LastFragment();
}
FragmentData::RareData& FragmentData::EnsureRareData() {
if (!rare_data_)
rare_data_ = std::make_unique<RareData>();
return *rare_data_;
}
void FragmentData::SetLayer(std::unique_ptr<PaintLayer> layer) {
if (rare_data_ || layer)
EnsureRareData().layer = std::move(layer);
}
const TransformPaintPropertyNodeOrAlias& FragmentData::PreTransform() const {
if (const auto* properties = PaintProperties()) {
if (const auto* transform = properties->Transform()) {
DCHECK(transform->Parent());
return *transform->Parent();
}
}
return LocalBorderBoxProperties().Transform();
}
const TransformPaintPropertyNodeOrAlias& FragmentData::PostScrollTranslation()
const {
if (const auto* properties = PaintProperties()) {
if (properties->TransformIsolationNode())
return *properties->TransformIsolationNode();
if (properties->ScrollTranslation())
return *properties->ScrollTranslation();
if (properties->ReplacedContentTransform())
return *properties->ReplacedContentTransform();
if (properties->Perspective())
return *properties->Perspective();
}
return LocalBorderBoxProperties().Transform();
}
const ClipPaintPropertyNodeOrAlias& FragmentData::PreClip() const {
if (const auto* properties = PaintProperties()) {
if (const auto* clip = properties->ClipPathClip()) {
// SPv1 composited clip-path has an alternative clip tree structure.
// If the clip-path is parented by the mask clip, it is only used
// to clip mask layer chunks, and not in the clip inheritance chain.
DCHECK(clip->Parent());
if (clip->Parent() != properties->MaskClip())
return *clip->Parent();
}
if (const auto* mask_clip = properties->MaskClip()) {
DCHECK(mask_clip->Parent());
return *mask_clip->Parent();
}
if (const auto* css_clip = properties->CssClip()) {
DCHECK(css_clip->Parent());
return *css_clip->Parent();
}
}
return LocalBorderBoxProperties().Clip();
}
const ClipPaintPropertyNodeOrAlias& FragmentData::PostOverflowClip() const {
if (const auto* properties = PaintProperties()) {
if (properties->ClipIsolationNode())
return *properties->ClipIsolationNode();
if (properties->OverflowClip())
return *properties->OverflowClip();
if (properties->InnerBorderRadiusClip())
return *properties->InnerBorderRadiusClip();
}
return LocalBorderBoxProperties().Clip();
}
const EffectPaintPropertyNodeOrAlias& FragmentData::PreEffect() const {
if (const auto* properties = PaintProperties()) {
if (const auto* effect = properties->Effect()) {
DCHECK(effect->Parent());
return *effect->Parent();
}
if (const auto* filter = properties->Filter()) {
DCHECK(filter->Parent());
return *filter->Parent();
}
}
return LocalBorderBoxProperties().Effect();
}
const EffectPaintPropertyNodeOrAlias& FragmentData::PreFilter() const {
if (const auto* properties = PaintProperties()) {
if (const auto* filter = properties->Filter()) {
DCHECK(filter->Parent());
return *filter->Parent();
}
}
return LocalBorderBoxProperties().Effect();
}
const EffectPaintPropertyNodeOrAlias& FragmentData::PostIsolationEffect()
const {
if (const auto* properties = PaintProperties()) {
if (properties->EffectIsolationNode())
return *properties->EffectIsolationNode();
}
return LocalBorderBoxProperties().Effect();
}
void FragmentData::InvalidateClipPathCache() {
if (!rare_data_)
return;
rare_data_->is_clip_path_cache_valid = false;
rare_data_->clip_path_bounding_box = base::nullopt;
rare_data_->clip_path_path = nullptr;
}
void FragmentData::SetClipPathCache(const IntRect& bounding_box,
scoped_refptr<const RefCountedPath> path) {
EnsureRareData().is_clip_path_cache_valid = true;
rare_data_->clip_path_bounding_box = bounding_box;
rare_data_->clip_path_path = std::move(path);
}
void FragmentData::MapRectToFragment(const FragmentData& fragment,
IntRect& rect) const {
if (this == &fragment)
return;
const auto& from_transform = LocalBorderBoxProperties().Transform();
const auto& to_transform = fragment.LocalBorderBoxProperties().Transform();
rect.MoveBy(RoundedIntPoint(PaintOffset()));
GeometryMapper::SourceToDestinationRect(from_transform, to_transform, rect);
rect.MoveBy(-RoundedIntPoint(fragment.PaintOffset()));
}
} // namespace blink
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