1/*
2 * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
3 * Copyright (C) 2016 Igalia S.L.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#if ENABLE(MATHML)
30
31#include "RenderMathMLScripts.h"
32
33namespace WebCore {
34
35class MathMLUnderOverElement;
36
37class RenderMathMLUnderOver final : public RenderMathMLScripts {
38 WTF_MAKE_ISO_ALLOCATED(RenderMathMLUnderOver);
39public:
40 RenderMathMLUnderOver(MathMLUnderOverElement&, RenderStyle&&);
41
42private:
43 bool isRenderMathMLScripts() const final { return false; }
44 bool isRenderMathMLUnderOver() const final { return true; }
45 const char* renderName() const final { return "RenderMathMLUnderOver"; }
46 MathMLUnderOverElement& element() const;
47
48 void computePreferredLogicalWidths() final;
49 void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) final;
50
51 void stretchHorizontalOperatorsAndLayoutChildren();
52 bool isValid() const;
53 bool shouldMoveLimits();
54 RenderBox& base() const;
55 RenderBox& under() const;
56 RenderBox& over() const;
57 LayoutUnit horizontalOffset(const RenderBox&) const;
58 bool hasAccent(bool accentUnder = false) const;
59 bool hasAccentUnder() const { return hasAccent(true); };
60 struct VerticalParameters {
61 bool useUnderOverBarFallBack;
62 LayoutUnit underGapMin;
63 LayoutUnit overGapMin;
64 LayoutUnit underShiftMin;
65 LayoutUnit overShiftMin;
66 LayoutUnit underExtraDescender;
67 LayoutUnit overExtraAscender;
68 LayoutUnit accentBaseHeight;
69 };
70 VerticalParameters verticalParameters() const;
71};
72
73}
74
75SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLUnderOver, isRenderMathMLUnderOver())
76
77#endif // ENABLE(MATHML)
78