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 <wtf/IsoMallocInlines.h>
33
34namespace WebCore {
35
36WTF_MAKE_ISO_ALLOCATED_IMPL(RenderMathMLSpace);
37
38RenderMathMLSpace::RenderMathMLSpace(MathMLSpaceElement& element, RenderStyle&& style)
39 : RenderMathMLBlock(element, WTFMove(style))
40{
41}
42
43void RenderMathMLSpace::computePreferredLogicalWidths()
44{
45 ASSERT(preferredLogicalWidthsDirty());
46
47 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = spaceWidth();
48
49 setPreferredLogicalWidthsDirty(false);
50}
51
52LayoutUnit RenderMathMLSpace::spaceWidth() const
53{
54 auto& spaceElement = element();
55 // FIXME: Negative width values are not supported yet.
56 return std::max<LayoutUnit>(0, toUserUnits(spaceElement.width(), style(), 0));
57}
58
59void RenderMathMLSpace::getSpaceHeightAndDepth(LayoutUnit& height, LayoutUnit& depth) const
60{
61 auto& spaceElement = element();
62 height = toUserUnits(spaceElement.height(), style(), 0);
63 depth = toUserUnits(spaceElement.depth(), style(), 0);
64
65 // If the total height is negative, set vertical dimensions to 0.
66 if (height + depth < 0) {
67 height = 0;
68 depth = 0;
69 }
70}
71
72void RenderMathMLSpace::layoutBlock(bool relayoutChildren, LayoutUnit)
73{
74 ASSERT(needsLayout());
75
76 if (!relayoutChildren && simplifiedLayout())
77 return;
78
79 setLogicalWidth(spaceWidth());
80 LayoutUnit height, depth;
81 getSpaceHeightAndDepth(height, depth);
82 setLogicalHeight(height + depth);
83
84 updateScrollInfoAfterLayout();
85
86 clearNeedsLayout();
87}
88
89Optional<int> RenderMathMLSpace::firstLineBaseline() const
90{
91 LayoutUnit height, depth;
92 getSpaceHeightAndDepth(height, depth);
93 return Optional<int>(height);
94}
95
96}
97
98#endif
99