1/*
2 * Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.
3 * Copyright (C) 2013 The MathJax Consortium.
4 * Copyright (C) 2016 Igalia S.L.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#pragma once
29
30#if ENABLE(MATHML)
31
32#include "MathMLScriptsElement.h"
33#include "RenderMathMLBlock.h"
34
35namespace WebCore {
36
37// Render a base with scripts.
38class RenderMathMLScripts : public RenderMathMLBlock {
39 WTF_MAKE_ISO_ALLOCATED(RenderMathMLScripts);
40public:
41 RenderMathMLScripts(MathMLScriptsElement&, RenderStyle&&);
42 RenderMathMLOperator* unembellishedOperator() const final;
43
44protected:
45 bool isRenderMathMLScripts() const override { return true; }
46 const char* renderName() const override { return "RenderMathMLScripts"; }
47 MathMLScriptsElement::ScriptType scriptType() const;
48 void computePreferredLogicalWidths() override;
49 void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) override;
50
51private:
52 MathMLScriptsElement& element() const;
53 Optional<int> firstLineBaseline() const final;
54 struct ReferenceChildren {
55 RenderBox* base;
56 RenderBox* prescriptDelimiter;
57 RenderBox* firstPostScript;
58 RenderBox* firstPreScript;
59 };
60 Optional<ReferenceChildren> validateAndGetReferenceChildren();
61 LayoutUnit spaceAfterScript();
62 LayoutUnit italicCorrection(const ReferenceChildren&);
63 struct VerticalParameters {
64 LayoutUnit subscriptShiftDown;
65 LayoutUnit superscriptShiftUp;
66 LayoutUnit subscriptBaselineDropMin;
67 LayoutUnit superScriptBaselineDropMax;
68 LayoutUnit subSuperscriptGapMin;
69 LayoutUnit superscriptBottomMin;
70 LayoutUnit subscriptTopMax;
71 LayoutUnit superscriptBottomMaxWithSubscript;
72 };
73 VerticalParameters verticalParameters() const;
74 struct VerticalMetrics {
75 LayoutUnit subShift;
76 LayoutUnit supShift;
77 LayoutUnit ascent;
78 LayoutUnit descent;
79 };
80 VerticalMetrics verticalMetrics(const ReferenceChildren&);
81};
82
83} // namespace WebCore
84
85SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLScripts, isRenderMathMLScripts())
86
87#endif // ENABLE(MATHML)
88