1/*
2 * Copyright (C) 2010 Alex Milowski (alex@milowski.com). 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 "RenderMathMLMath.h"
28
29#if ENABLE(MATHML)
30
31#include "MathMLNames.h"
32#include "MathMLRowElement.h"
33#include <wtf/IsoMallocInlines.h>
34
35namespace WebCore {
36
37using namespace MathMLNames;
38
39WTF_MAKE_ISO_ALLOCATED_IMPL(RenderMathMLMath);
40
41RenderMathMLMath::RenderMathMLMath(MathMLRowElement& element, RenderStyle&& style)
42 : RenderMathMLRow(element, WTFMove(style))
43{
44}
45
46void RenderMathMLMath::centerChildren(LayoutUnit contentWidth)
47{
48 LayoutUnit centerBlockOffset = (logicalWidth() - contentWidth) / 2;
49 if (!style().isLeftToRightDirection())
50 centerBlockOffset = -centerBlockOffset;
51 for (auto* child = firstChildBox(); child; child = child->nextSiblingBox()) {
52 if (!child->isOutOfFlowPositioned())
53 child->setLocation(child->location() + LayoutPoint(centerBlockOffset, 0_lu));
54 }
55}
56
57void RenderMathMLMath::layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight)
58{
59 ASSERT(needsLayout());
60
61 if (style().display() != DisplayType::Block) {
62 RenderMathMLRow::layoutBlock(relayoutChildren, pageLogicalHeight);
63 return;
64 }
65
66 if (!relayoutChildren && simplifiedLayout())
67 return;
68
69 recomputeLogicalWidth();
70
71 setLogicalHeight(borderAndPaddingLogicalHeight() + scrollbarLogicalHeight());
72
73 LayoutUnit width, ascent, descent;
74 stretchVerticalOperatorsAndLayoutChildren();
75 getContentBoundingBox(width, ascent, descent);
76 layoutRowItems(logicalWidth(), ascent);
77
78 // Display formulas must be centered horizontally if there is extra space left.
79 // Otherwise, logical width must be updated to the content width to avoid truncation.
80 if (width < logicalWidth())
81 centerChildren(width);
82 else
83 setLogicalWidth(width);
84
85 setLogicalHeight(borderTop() + paddingTop() + ascent + descent + borderBottom() + paddingBottom() + horizontalScrollbarHeight());
86 updateLogicalHeight();
87
88 layoutPositionedObjects(relayoutChildren);
89
90 updateScrollInfoAfterLayout();
91
92 clearNeedsLayout();
93}
94
95}
96
97#endif // ENABLE(MATHML)
98