1/*
2 * Copyright (C) 2013 The MathJax Consortium. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
14 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
15 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
16 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
17 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
19 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "RenderMathMLSpace.h"
28
29#if ENABLE(MATHML)
30
31#include "GraphicsContext.h"
32#include "MathMLNames.h"
33#include "PaintInfo.h"
34
35namespace WebCore {
36
37using namespace MathMLNames;
38
39RenderMathMLSpace::RenderMathMLSpace(MathMLTextElement& element, PassRef<RenderStyle> style)
40    : RenderMathMLBlock(element, WTF::move(style))
41    , m_width(0)
42    , m_height(0)
43    , m_depth(0)
44{
45}
46
47void RenderMathMLSpace::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
48{
49    minLogicalWidth = m_width;
50    maxLogicalWidth = m_width;
51}
52
53void RenderMathMLSpace::updateFromElement()
54{
55    const auto& spaceElement = element();
56
57    // This parses the mspace attributes, using 0 as the default values.
58    m_width = 0;
59    m_height = 0;
60    m_depth = 0;
61    parseMathMLLength(spaceElement.getAttribute(MathMLNames::widthAttr), m_width, &style());
62    parseMathMLLength(spaceElement.getAttribute(MathMLNames::heightAttr), m_height, &style());
63    parseMathMLLength(spaceElement.getAttribute(MathMLNames::depthAttr), m_depth, &style());
64
65    // FIXME: Negative width values should be accepted.
66    if (m_width < 0)
67        m_width = 0;
68
69    // If the total height is negative, set vertical dimensions to 0.
70    if (m_height + m_depth < 0) {
71        m_height = 0;
72        m_depth = 0;
73    }
74
75    setNeedsLayoutAndPrefWidthsRecalc();
76}
77
78void RenderMathMLSpace::updateLogicalWidth()
79{
80    setLogicalWidth(m_width);
81}
82
83void RenderMathMLSpace::updateLogicalHeight()
84{
85    setLogicalHeight(m_height + m_depth);
86}
87
88void RenderMathMLSpace::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
89{
90    RenderMathMLBlock::styleDidChange(diff, oldStyle);
91    updateFromElement();
92}
93
94int RenderMathMLSpace::firstLineBaseline() const
95{
96    return m_height;
97}
98
99}
100
101#endif
102