1/*
2 * Copyright (C) 2016-2019 Apple Inc. 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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "DOMRectInit.h"
29#include "ScriptWrappable.h"
30#include <wtf/IsoMalloc.h>
31#include <wtf/MathExtras.h>
32#include <wtf/Ref.h>
33#include <wtf/RefCounted.h>
34
35namespace WebCore {
36
37class DOMRectReadOnly : public ScriptWrappable, public RefCounted<DOMRectReadOnly> {
38 WTF_MAKE_ISO_ALLOCATED_EXPORT(DOMRectReadOnly, WEBCORE_EXPORT);
39public:
40 static Ref<DOMRectReadOnly> create(double x, double y, double width, double height) { return adoptRef(*new DOMRectReadOnly(x, y, width, height)); }
41 static Ref<DOMRectReadOnly> fromRect(const DOMRectInit& init) { return create(init.x, init.y, init.width, init.height); }
42
43 double x() const { return m_x; }
44 double y() const { return m_y; }
45 double width() const { return m_width; }
46 double height() const { return m_height; }
47
48 // Model NaN handling after Math.min, Math.max.
49 double top() const { return WTF::nanPropagatingMin(m_y, m_y + m_height); }
50 double right() const { return WTF::nanPropagatingMax(m_x, m_x + m_width); }
51 double bottom() const { return WTF::nanPropagatingMax(m_y, m_y + m_height); }
52 double left() const { return WTF::nanPropagatingMin(m_x, m_x + m_width); }
53
54protected:
55 DOMRectReadOnly(double x, double y, double width, double height)
56 : m_x(x)
57 , m_y(y)
58 , m_width(width)
59 , m_height(height)
60 {
61 }
62
63 DOMRectReadOnly() = default;
64
65 // Any of these can be NaN or Inf.
66 double m_x { 0 };
67 double m_y { 0 };
68 double m_width { 0 }; // Can be negative.
69 double m_height { 0 }; // Can be negative.
70};
71
72}
73