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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "WritingMode.h"
#include <array>
#include <wtf/OptionSet.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
enum class BoxSideFlag : uint8_t {
Top = 1 << static_cast<unsigned>(BoxSide::Top),
Right = 1 << static_cast<unsigned>(BoxSide::Right),
Bottom = 1 << static_cast<unsigned>(BoxSide::Bottom),
Left = 1 << static_cast<unsigned>(BoxSide::Left)
};
using BoxSideSet = OptionSet<BoxSideFlag>;
template<typename T> class RectEdges {
public:
RectEdges() = default;
RectEdges(const RectEdges&) = default;
RectEdges& operator=(const RectEdges&) = default;
template<typename U>
RectEdges(U&& top, U&& right, U&& bottom, U&& left)
: m_sides({ { std::forward<T>(top), std::forward<T>(right), std::forward<T>(bottom), std::forward<T>(left) } })
{ }
T& at(BoxSide side) { return m_sides[static_cast<size_t>(side)]; }
T& operator[](BoxSide side) { return m_sides[static_cast<size_t>(side)]; }
T& top() { return at(BoxSide::Top); }
T& right() { return at(BoxSide::Right); }
T& bottom() { return at(BoxSide::Bottom); }
T& left() { return at(BoxSide::Left); }
const T& at(BoxSide side) const { return m_sides[static_cast<size_t>(side)]; }
const T& operator[](BoxSide side) const { return m_sides[static_cast<size_t>(side)]; }
const T& top() const { return at(BoxSide::Top); }
const T& right() const { return at(BoxSide::Right); }
const T& bottom() const { return at(BoxSide::Bottom); }
const T& left() const { return at(BoxSide::Left); }
void setAt(BoxSide side, const T& v) { at(side) = v; }
void setTop(const T& top) { setAt(BoxSide::Top, top); }
void setRight(const T& right) { setAt(BoxSide::Right, right); }
void setBottom(const T& bottom) { setAt(BoxSide::Bottom, bottom); }
void setLeft(const T& left) { setAt(BoxSide::Left, left); }
RectEdges<T> xFlippedCopy() const
{
RectEdges<T> copy { *this };
copy.left() = right();
copy.right() = left();
return copy;
}
RectEdges<T> yFlippedCopy() const
{
RectEdges<T> copy { *this };
copy.top() = bottom();
copy.bottom() = top();
return copy;
}
T& before(WritingMode writingMode) { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::BlockStart)); }
T& after(WritingMode writingMode) { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::BlockEnd)); }
T& start(WritingMode writingMode, TextDirection direction = TextDirection::LTR) { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::InlineStart)); }
T& end(WritingMode writingMode, TextDirection direction = TextDirection::LTR) { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::InlineEnd)); }
const T& before(WritingMode writingMode) const { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::BlockStart)); }
const T& after(WritingMode writingMode) const { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::BlockEnd)); }
const T& start(WritingMode writingMode, TextDirection direction = TextDirection::LTR) const { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::InlineStart)); }
const T& end(WritingMode writingMode, TextDirection direction = TextDirection::LTR) const { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::InlineEnd)); }
void setBefore(const T& before, WritingMode writingMode) { this->before(writingMode) = before; }
void setAfter(const T& after, WritingMode writingMode) { this->after(writingMode) = after; }
void setStart(const T& start, WritingMode writingMode, TextDirection direction = TextDirection::LTR) { this->start(writingMode, direction) = start; }
void setEnd(const T& end, WritingMode writingMode, TextDirection direction = TextDirection::LTR) { this->end(writingMode, direction) = end; }
RectEdges<T> blockFlippedCopy(WritingMode writingMode) const
{
if (isHorizontalWritingMode(writingMode))
return yFlippedCopy();
return xFlippedCopy();
}
RectEdges<T> inlineFlippedCopy(WritingMode writingMode) const
{
if (isHorizontalWritingMode(writingMode))
return xFlippedCopy();
return yFlippedCopy();
}
friend bool operator==(const RectEdges&, const RectEdges&) = default;
bool isZero() const
{
return !top() && !right() && !bottom() && !left();
}
private:
std::array<T, 4> m_sides { };
};
template<typename T>
constexpr RectEdges<T> operator+(const RectEdges<T>& a, const RectEdges<T>& b)
{
return {
a.top() + b.top(),
a.right() + b.right(),
a.bottom() + b.bottom(),
a.left() + b.left()
};
}
template<typename T>
inline RectEdges<T>& operator+=(RectEdges<T>& a, const RectEdges<T>& b)
{
a = a + b;
return a;
}
template<typename T>
TextStream& operator<<(TextStream& ts, const RectEdges<T>& edges)
{
ts << "[top " << edges.top() << " right " << edges.right() << " bottom " << edges.bottom() << " left " << edges.left() << "]";
return ts;
}
}
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