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/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "ShadowData.h"
#include "FloatRect.h"
#include "IntRect.h"
using namespace std;
namespace WebCore {
ShadowData::ShadowData(const ShadowData& o)
: m_x(o.m_x)
, m_y(o.m_y)
, m_blur(o.m_blur)
, m_spread(o.m_spread)
, m_color(o.m_color)
, m_style(o.m_style)
, m_isWebkitBoxShadow(o.m_isWebkitBoxShadow)
{
m_next = o.m_next ? new ShadowData(*o.m_next) : 0;
}
bool ShadowData::operator==(const ShadowData& o) const
{
if ((m_next && !o.m_next) || (!m_next && o.m_next)
|| (m_next && o.m_next && *m_next != *o.m_next))
return false;
return m_x == o.m_x
&& m_y == o.m_y
&& m_blur == o.m_blur
&& m_spread == o.m_spread
&& m_style == o.m_style
&& m_color == o.m_color
&& m_isWebkitBoxShadow == o.m_isWebkitBoxShadow;
}
static inline void calculateShadowExtent(const ShadowData* shadow, int additionalOutlineSize, int& shadowLeft, int& shadowRight, int& shadowTop, int& shadowBottom)
{
do {
int blurAndSpread = shadow->blur() + shadow->spread() + additionalOutlineSize;
if (shadow->style() == Normal) {
shadowLeft = min(shadow->x() - blurAndSpread, shadowLeft);
shadowRight = max(shadow->x() + blurAndSpread, shadowRight);
shadowTop = min(shadow->y() - blurAndSpread, shadowTop);
shadowBottom = max(shadow->y() + blurAndSpread, shadowBottom);
}
shadow = shadow->next();
} while (shadow);
}
void ShadowData::adjustRectForShadow(IntRect& rect, int additionalOutlineSize) const
{
int shadowLeft = 0;
int shadowRight = 0;
int shadowTop = 0;
int shadowBottom = 0;
calculateShadowExtent(this, additionalOutlineSize, shadowLeft, shadowRight, shadowTop, shadowBottom);
rect.move(shadowLeft, shadowTop);
rect.setWidth(rect.width() - shadowLeft + shadowRight);
rect.setHeight(rect.height() - shadowTop + shadowBottom);
}
void ShadowData::adjustRectForShadow(FloatRect& rect, int additionalOutlineSize) const
{
int shadowLeft = 0;
int shadowRight = 0;
int shadowTop = 0;
int shadowBottom = 0;
calculateShadowExtent(this, additionalOutlineSize, shadowLeft, shadowRight, shadowTop, shadowBottom);
rect.move(shadowLeft, shadowTop);
rect.setWidth(rect.width() - shadowLeft + shadowRight);
rect.setHeight(rect.height() - shadowTop + shadowBottom);
}
} // namespace WebCore
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