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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/layout/ng/inline/ng_line_box_fragment_builder.h"
#include "third_party/blink/renderer/core/layout/ng/exclusions/ng_exclusion_space.h"
#include "third_party/blink/renderer/core/layout/ng/inline/ng_inline_break_token.h"
#include "third_party/blink/renderer/core/layout/ng/inline/ng_inline_item_result.h"
#include "third_party/blink/renderer/core/layout/ng/inline/ng_inline_node.h"
#include "third_party/blink/renderer/core/layout/ng/inline/ng_logical_line_item.h"
#include "third_party/blink/renderer/core/layout/ng/inline/ng_physical_line_box_fragment.h"
#include "third_party/blink/renderer/core/layout/ng/inline/ng_text_fragment_builder.h"
#include "third_party/blink/renderer/core/layout/ng/ng_fragment.h"
#include "third_party/blink/renderer/core/layout/ng/ng_layout_result.h"
#include "third_party/blink/renderer/core/layout/ng/ng_physical_box_fragment.h"
#include "third_party/blink/renderer/core/layout/ng/ng_positioned_float.h"
namespace blink {
void NGLineBoxFragmentBuilder::Reset() {
children_.Shrink(0);
child_break_tokens_.Shrink(0);
inline_break_tokens_.Shrink(0);
oof_positioned_candidates_.Shrink(0);
unpositioned_list_marker_ = NGUnpositionedListMarker();
size_.inline_size = LayoutUnit();
metrics_ = NGLineHeightMetrics();
line_box_type_ = NGPhysicalLineBoxFragment::kNormalLineBox;
break_appeal_ = kBreakAppealPerfect;
has_floating_descendants_for_paint_ = false;
has_orthogonal_flow_roots_ = false;
has_descendant_that_depends_on_percentage_block_size_ = false;
has_block_fragmentation_ = false;
may_have_descendant_above_block_start_ = false;
}
void NGLineBoxFragmentBuilder::SetIsEmptyLineBox() {
line_box_type_ = NGPhysicalLineBoxFragment::kEmptyLineBox;
}
void NGLineBoxFragmentBuilder::AddChildren(NGLogicalLineItems& children) {
children_.ReserveCapacity(children.size());
for (auto& child : children) {
if (child.layout_result) {
DCHECK(!child.fragment);
AddChild(child.layout_result->PhysicalFragment(), child.Offset());
child.layout_result.reset();
} else if (child.fragment) {
AddChild(std::move(child.fragment), child.Offset());
DCHECK(!child.fragment);
} else if (child.out_of_flow_positioned_box) {
AddOutOfFlowInlineChildCandidate(
NGBlockNode(ToLayoutBox(child.out_of_flow_positioned_box)),
child.Offset(), child.container_direction);
child.out_of_flow_positioned_box = nullptr;
}
}
}
void NGLineBoxFragmentBuilder::PropagateChildrenData(
NGLogicalLineItems& children) {
for (unsigned index = 0; index < children.size(); ++index) {
auto& child = children[index];
if (child.layout_result) {
DCHECK(!child.fragment);
PropagateChildData(child.layout_result->PhysicalFragment(),
child.Offset());
// Skip over any children, the information should have already been
// propagated into this layout result.
if (child.children_count)
index += child.children_count - 1;
continue;
}
if (child.out_of_flow_positioned_box) {
AddOutOfFlowInlineChildCandidate(
NGBlockNode(ToLayoutBox(child.out_of_flow_positioned_box)),
child.Offset(), child.container_direction);
child.out_of_flow_positioned_box = nullptr;
}
}
DCHECK(oof_positioned_descendants_.IsEmpty());
MoveOutOfFlowDescendantCandidatesToDescendants();
}
scoped_refptr<const NGLayoutResult>
NGLineBoxFragmentBuilder::ToLineBoxFragment() {
writing_direction_.SetWritingMode(ToLineWritingMode(GetWritingMode()));
if (!break_token_)
break_token_ = NGInlineBreakToken::Create(node_);
scoped_refptr<const NGPhysicalLineBoxFragment> fragment =
NGPhysicalLineBoxFragment::Create(this);
return base::AdoptRef(
new NGLayoutResult(NGLayoutResult::NGLineBoxFragmentBuilderPassKey(),
std::move(fragment), this));
}
} // namespace blink
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