1/*
2 * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22#include "config.h"
23#include "ShadowData.h"
24
25#include <wtf/PointerComparison.h>
26
27namespace WebCore {
28
29ShadowData::ShadowData(const ShadowData& o)
30 : m_location(o.m_location)
31 , m_radius(o.m_radius)
32 , m_spread(o.m_spread)
33 , m_color(o.m_color)
34 , m_style(o.m_style)
35 , m_isWebkitBoxShadow(o.m_isWebkitBoxShadow)
36 , m_next(o.m_next ? std::make_unique<ShadowData>(*o.m_next) : nullptr)
37{
38}
39
40Optional<ShadowData> ShadowData::clone(const ShadowData* data)
41{
42 if (!data)
43 return WTF::nullopt;
44 return *data;
45}
46
47bool ShadowData::operator==(const ShadowData& o) const
48{
49 if (!arePointingToEqualData(m_next, o.m_next))
50 return false;
51
52 return m_location == o.m_location
53 && m_radius == o.m_radius
54 && m_spread == o.m_spread
55 && m_style == o.m_style
56 && m_color == o.m_color
57 && m_isWebkitBoxShadow == o.m_isWebkitBoxShadow;
58}
59
60static inline void calculateShadowExtent(const ShadowData* shadow, int additionalOutlineSize, int& shadowLeft, int& shadowRight, int& shadowTop, int& shadowBottom)
61{
62 do {
63 int extentAndSpread = shadow->paintingExtent() + shadow->spread() + additionalOutlineSize;
64 if (shadow->style() == Normal) {
65 shadowLeft = std::min(shadow->x() - extentAndSpread, shadowLeft);
66 shadowRight = std::max(shadow->x() + extentAndSpread, shadowRight);
67 shadowTop = std::min(shadow->y() - extentAndSpread, shadowTop);
68 shadowBottom = std::max(shadow->y() + extentAndSpread, shadowBottom);
69 }
70
71 shadow = shadow->next();
72 } while (shadow);
73}
74
75void ShadowData::adjustRectForShadow(LayoutRect& rect, int additionalOutlineSize) const
76{
77 int shadowLeft = 0;
78 int shadowRight = 0;
79 int shadowTop = 0;
80 int shadowBottom = 0;
81 calculateShadowExtent(this, additionalOutlineSize, shadowLeft, shadowRight, shadowTop, shadowBottom);
82
83 rect.move(shadowLeft, shadowTop);
84 rect.setWidth(rect.width() - shadowLeft + shadowRight);
85 rect.setHeight(rect.height() - shadowTop + shadowBottom);
86}
87
88void ShadowData::adjustRectForShadow(FloatRect& rect, int additionalOutlineSize) const
89{
90 int shadowLeft = 0;
91 int shadowRight = 0;
92 int shadowTop = 0;
93 int shadowBottom = 0;
94 calculateShadowExtent(this, additionalOutlineSize, shadowLeft, shadowRight, shadowTop, shadowBottom);
95
96 rect.move(shadowLeft, shadowTop);
97 rect.setWidth(rect.width() - shadowLeft + shadowRight);
98 rect.setHeight(rect.height() - shadowTop + shadowBottom);
99}
100
101} // namespace WebCore
102