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 "FloatRect.h"
26 #include "IntRect.h"
27
28 using namespace std;
29
30 namespace WebCore {
31
ShadowData(const ShadowData & o)32 ShadowData::ShadowData(const ShadowData& o)
33 : m_x(o.m_x)
34 , m_y(o.m_y)
35 , m_blur(o.m_blur)
36 , m_spread(o.m_spread)
37 , m_color(o.m_color)
38 , m_style(o.m_style)
39 , m_isWebkitBoxShadow(o.m_isWebkitBoxShadow)
40 , m_next(o.m_next ? adoptPtr(new ShadowData(*o.m_next)) : nullptr)
41 {
42 }
43
operator ==(const ShadowData & o) const44 bool ShadowData::operator==(const ShadowData& o) const
45 {
46 if ((m_next && !o.m_next) || (!m_next && o.m_next)
47 || (m_next && o.m_next && *m_next != *o.m_next))
48 return false;
49
50 return m_x == o.m_x
51 && m_y == o.m_y
52 && m_blur == o.m_blur
53 && m_spread == o.m_spread
54 && m_style == o.m_style
55 && m_color == o.m_color
56 && m_isWebkitBoxShadow == o.m_isWebkitBoxShadow;
57 }
58
calculateShadowExtent(const ShadowData * shadow,int additionalOutlineSize,int & shadowLeft,int & shadowRight,int & shadowTop,int & shadowBottom)59 static inline void calculateShadowExtent(const ShadowData* shadow, int additionalOutlineSize, int& shadowLeft, int& shadowRight, int& shadowTop, int& shadowBottom)
60 {
61 do {
62 int blurAndSpread = shadow->blur() + shadow->spread() + additionalOutlineSize;
63 if (shadow->style() == Normal) {
64 shadowLeft = min(shadow->x() - blurAndSpread, shadowLeft);
65 shadowRight = max(shadow->x() + blurAndSpread, shadowRight);
66 shadowTop = min(shadow->y() - blurAndSpread, shadowTop);
67 shadowBottom = max(shadow->y() + blurAndSpread, shadowBottom);
68 }
69
70 shadow = shadow->next();
71 } while (shadow);
72 }
73
adjustRectForShadow(IntRect & rect,int additionalOutlineSize) const74 void ShadowData::adjustRectForShadow(IntRect& rect, int additionalOutlineSize) const
75 {
76 int shadowLeft = 0;
77 int shadowRight = 0;
78 int shadowTop = 0;
79 int shadowBottom = 0;
80 calculateShadowExtent(this, additionalOutlineSize, shadowLeft, shadowRight, shadowTop, shadowBottom);
81
82 rect.move(shadowLeft, shadowTop);
83 rect.setWidth(rect.width() - shadowLeft + shadowRight);
84 rect.setHeight(rect.height() - shadowTop + shadowBottom);
85 }
86
adjustRectForShadow(FloatRect & rect,int additionalOutlineSize) const87 void ShadowData::adjustRectForShadow(FloatRect& rect, int additionalOutlineSize) const
88 {
89 int shadowLeft = 0;
90 int shadowRight = 0;
91 int shadowTop = 0;
92 int shadowBottom = 0;
93 calculateShadowExtent(this, additionalOutlineSize, shadowLeft, shadowRight, shadowTop, shadowBottom);
94
95 rect.move(shadowLeft, shadowTop);
96 rect.setWidth(rect.width() - shadowLeft + shadowRight);
97 rect.setHeight(rect.height() - shadowTop + shadowBottom);
98 }
99
100 } // namespace WebCore
101