chromium/third_party/blink/renderer/core/layout/mathml/math_under_over_layout_algorithm.cc

// Copyright 2020 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/mathml/math_under_over_layout_algorithm.h"

#include "third_party/blink/renderer/core/layout/block_break_token.h"
#include "third_party/blink/renderer/core/layout/length_utils.h"
#include "third_party/blink/renderer/core/layout/logical_box_fragment.h"
#include "third_party/blink/renderer/core/layout/mathml/math_layout_utils.h"
#include "third_party/blink/renderer/core/layout/physical_box_fragment.h"
#include "third_party/blink/renderer/core/mathml/mathml_operator_element.h"
#include "third_party/blink/renderer/core/mathml/mathml_under_over_element.h"

namespace blink {
namespace {

// Describes the amount to shift to apply to the under/over boxes.
// Data is populated from the OpenType MATH table.
// If the OpenType MATH table is not present fallback values are used.
// https://w3c.github.io/mathml-core/#base-with-underscript
// https://w3c.github.io/mathml-core/#base-with-overscript
struct UnderOverVerticalParameters { … };

UnderOverVerticalParameters GetUnderOverVerticalParameters(
    const ComputedStyle& style,
    bool is_base_large_operator,
    bool is_base_stretchy_in_inline_axis) { … }

// https://w3c.github.io/mathml-core/#underscripts-and-overscripts-munder-mover-munderover
bool HasAccent(const BlockNode& node, bool accent_under) { … }

}  // namespace

MathUnderOverLayoutAlgorithm::MathUnderOverLayoutAlgorithm(
    const LayoutAlgorithmParams& params)
    : … { … }

void MathUnderOverLayoutAlgorithm::GatherChildren(BlockNode* base,
                                                  BlockNode* over,
                                                  BlockNode* under) { … }

const LayoutResult* MathUnderOverLayoutAlgorithm::Layout() { … }

MinMaxSizesResult MathUnderOverLayoutAlgorithm::ComputeMinMaxSizes(
    const MinMaxSizesFloatInput&) { … }

}  // namespace blink