// Copyright 2016 The Chromium Authors
// 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/constraint_space.h"

#include <algorithm>
#include <memory>

#include "third_party/blink/renderer/core/layout/constraint_space_builder.h"
#include "third_party/blink/renderer/core/layout/layout_block.h"
#include "third_party/blink/renderer/core/layout/layout_box_utils.h"
#include "third_party/blink/renderer/core/layout/layout_result.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/layout/length_utils.h"
#include "third_party/blink/renderer/platform/wtf/size_assertions.h"

namespace blink {

namespace {

struct SameSizeAsConstraintSpace {
  LogicalSize available_size;
  LogicalSize percentage_size;
  BfcOffset bfc_offset;
  ExclusionSpace exclusion_space;
  Member<void*> rare_data;
  unsigned bitfields[1];
};

ASSERT_SIZE(ConstraintSpace, SameSizeAsConstraintSpace);

}  // namespace

const ConstraintSpace& ConstraintSpace::CloneForBlockInInlineIfNeeded(
    std::optional<ConstraintSpace>& space) const {
  if (ShouldTextBoxTrimNodeEnd()) {
    // A block-in-inline always has following lines, though it could be empty.
    // `ShouldTextBoxTrimEnd()` shouldn't trim the end if it's not the last
    // inflow child. See `CreateConstraintSpaceForChild()`.
    //
    // If all following lines are empty, which in turn makes it the last
    // *non-empty* inflow child, `RelayoutForTextBoxTrimEnd()` should run the
    // layout again with `ShouldForceTextBoxTrimEnd()` set.
    space.emplace(*this);
    DCHECK(space->rare_data_);
    RareData* rare_data = MakeGarbageCollected<RareData>(*space->rare_data_);
    if (ShouldForceTextBoxTrimEnd()) {
      rare_data->should_force_text_box_trim_end = false;
    } else {
      rare_data->should_text_box_trim_node_end = false;
      rare_data->should_text_box_trim_fragmentainer_end = false;
    }
    space->rare_data_ = rare_data;
    return *space;
  } else {
    DCHECK(!ShouldForceTextBoxTrimEnd());
  }

  return *this;
}

String ConstraintSpace::ToString() const {
  return StrCat({"Offset: ", BfcOffset().line_offset.ToString(), ",",
                 BfcOffset().block_offset.ToString(),
                 " Size: ", AvailableSize().inline_size.ToString(), "x",
                 AvailableSize().block_size.ToString(), " Clearance: ",
                 HasClearanceOffset() ? ClearanceOffset().ToString() : "none"});
}

}  // namespace blink