| /* |
| * Copyright (C) 2021 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 AND ITS CONTRIBUTORS "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 OR ITS 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 "GradientColorStop.h" |
| #include <algorithm> |
| #include <optional> |
| #include <wtf/Forward.h> |
| #include <wtf/Vector.h> |
| |
| namespace WebCore { |
| |
| class GradientColorStops { |
| public: |
| using StopVector = Vector<GradientColorStop, 2>; |
| |
| struct Sorted { |
| StopVector stops; |
| }; |
| |
| GradientColorStops() |
| : m_isSorted { true } |
| { |
| } |
| |
| GradientColorStops(StopVector stops) |
| : m_stops { WTFMove(stops) } |
| , m_isSorted { false } |
| { |
| } |
| |
| GradientColorStops(Sorted sortedStops) |
| : m_stops { WTFMove(sortedStops.stops) } |
| , m_isSorted { true } |
| { |
| ASSERT(validateIsSorted()); |
| } |
| |
| void addColorStop(GradientColorStop stop) |
| { |
| if (!m_stops.isEmpty() && m_stops.last().offset > stop.offset) |
| m_isSorted = false; |
| m_stops.append(WTFMove(stop)); |
| } |
| |
| void sort() |
| { |
| if (m_isSorted) |
| return; |
| |
| std::stable_sort(m_stops.begin(), m_stops.end(), [] (auto& a, auto& b) { |
| return a.offset < b.offset; |
| }); |
| m_isSorted = true; |
| } |
| |
| const GradientColorStops& sorted() const |
| { |
| const_cast<GradientColorStops*>(this)->sort(); |
| return *this; |
| } |
| |
| size_t size() const { return m_stops.size(); } |
| bool isEmpty() const { return m_stops.isEmpty(); } |
| |
| StopVector::const_iterator begin() const { return m_stops.begin(); } |
| StopVector::const_iterator end() const { return m_stops.end(); } |
| |
| template<typename MapFunction> GradientColorStops mapColors(MapFunction&& mapFunction) const |
| { |
| return { |
| m_stops.map<StopVector>([&] (const GradientColorStop& stop) -> GradientColorStop { |
| return { stop.offset, mapFunction(stop.color) }; |
| }), |
| m_isSorted |
| }; |
| } |
| |
| const StopVector& stops() const { return m_stops; } |
| |
| template<typename Encoder> void encode(Encoder&) const; |
| template<typename Decoder> static std::optional<GradientColorStops> decode(Decoder&); |
| |
| private: |
| GradientColorStops(StopVector stops, bool isSorted) |
| : m_stops { WTFMove(stops) } |
| , m_isSorted { isSorted } |
| { |
| } |
| |
| #if ASSERT_ENABLED |
| bool validateIsSorted() const |
| { |
| return std::is_sorted(m_stops.begin(), m_stops.end(), [] (auto& a, auto& b) { |
| return a.offset < b.offset; |
| }); |
| } |
| #endif |
| |
| StopVector m_stops; |
| bool m_isSorted; |
| }; |
| |
| template<typename Encoder> void GradientColorStops::encode(Encoder& encoder) const |
| { |
| encoder << m_stops; |
| } |
| |
| template<typename Decoder> std::optional<GradientColorStops> GradientColorStops::decode(Decoder& decoder) |
| { |
| std::optional<StopVector> stops; |
| decoder >> stops; |
| if (!stops) |
| return std::nullopt; |
| |
| return {{ WTFMove(*stops) }}; |
| } |
| |
| TextStream& operator<<(TextStream&, const GradientColorStops&); |
| |
| } // namespace WebCore |