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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 <wtf/PointerComparison.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
ShadowData::ShadowData(const ShadowData& o)
: m_location(o.m_location.x(), o.m_location.y())
, m_spread(o.m_spread)
, m_radius(o.m_radius)
, m_color(o.m_color)
, m_style(o.m_style)
, m_isWebkitBoxShadow(o.m_isWebkitBoxShadow)
, m_next(o.m_next ? makeUnique<ShadowData>(*o.m_next) : nullptr)
{
}
void ShadowData::deleteNextLinkedListWithoutRecursion()
{
// Avoid recursion errors when the linked list is too long.
for (auto next = std::exchange(m_next, nullptr); (next = std::exchange(next->m_next, nullptr));) { }
}
std::optional<ShadowData> ShadowData::clone(const ShadowData* data)
{
if (!data)
return std::nullopt;
return *data;
}
bool ShadowData::operator==(const ShadowData& o) const
{
auto comparison = [](const auto& a, const auto& b) {
return a.m_location == b.m_location
&& a.m_radius == b.m_radius
&& a.m_spread == b.m_spread
&& a.m_style == b.m_style
&& a.m_color == b.m_color
&& a.m_isWebkitBoxShadow == b.m_isWebkitBoxShadow;
};
if (!comparison(*this, o))
return false;
// Avoid relying on recursion in case the linked list is very long.
auto* next = m_next.get();
auto* oNext = o.m_next.get();
while (next || oNext) {
if (!next || !oNext || !comparison(*next, *oNext))
return false;
next = next->m_next.get();
oNext = oNext->m_next.get();
}
return true;
}
static inline void calculateShadowExtent(const ShadowData* shadow, LayoutUnit additionalOutlineSize, LayoutUnit& shadowLeft, LayoutUnit& shadowRight, LayoutUnit& shadowTop, LayoutUnit& shadowBottom)
{
do {
LayoutUnit extentAndSpread = shadow->paintingExtent() + LayoutUnit(shadow->spread().value()) + additionalOutlineSize;
if (shadow->style() == ShadowStyle::Normal) {
shadowLeft = std::min(LayoutUnit(shadow->x().value()) - extentAndSpread, shadowLeft);
shadowRight = std::max(LayoutUnit(shadow->x().value()) + extentAndSpread, shadowRight);
shadowTop = std::min(LayoutUnit(shadow->y().value()) - extentAndSpread, shadowTop);
shadowBottom = std::max(LayoutUnit(shadow->y().value()) + extentAndSpread, shadowBottom);
}
shadow = shadow->next();
} while (shadow);
}
void ShadowData::adjustRectForShadow(LayoutRect& rect, int additionalOutlineSize) const
{
LayoutUnit shadowLeft;
LayoutUnit shadowRight;
LayoutUnit shadowTop;
LayoutUnit shadowBottom;
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
{
LayoutUnit shadowLeft = 0;
LayoutUnit shadowRight = 0;
LayoutUnit shadowTop = 0;
LayoutUnit 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);
}
TextStream& operator<<(TextStream& ts, const ShadowData& data)
{
ts.dumpProperty("location", data.location());
ts.dumpProperty("radius", data.radius());
ts.dumpProperty("spread", data.spread());
ts.dumpProperty("color", data.color());
return ts;
}
} // namespace WebCore
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