1 /* 2 * Copyright (C) 1999 Antti Koivisto (koivisto (at) 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 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 { 41 m_next = o.m_next ? new ShadowData(*o.m_next) : 0; 42 } 43 44 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 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 74 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 87 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
