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119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
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* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
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* Copyright (c) 2023, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/CSS/CSSStyleValue.h>
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namespace Web::CSS {
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class EasingStyleValue final : public StyleValueWithDefaultOperators<EasingStyleValue> {
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public:
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struct Linear {
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static Linear identity();
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struct Stop {
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double output;
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Optional<double> input;
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// "NOTE: Serialization relies on whether or not an input progress value was originally supplied,
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// so that information should be retained in the internal representation."
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bool had_explicit_input;
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bool operator==(Stop const&) const = default;
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};
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Vector<Stop> stops;
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bool operator==(Linear const&) const = default;
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double evaluate_at(double input_progress, bool before_flag) const;
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String to_string() const;
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Linear(Vector<Stop> stops);
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};
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struct CubicBezier {
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static CubicBezier ease();
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static CubicBezier ease_in();
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static CubicBezier ease_out();
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static CubicBezier ease_in_out();
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double x1;
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double y1;
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double x2;
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double y2;
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struct CachedSample {
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double x;
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double y;
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double t;
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};
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mutable Vector<CachedSample> m_cached_x_samples {};
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bool operator==(CubicBezier const&) const;
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double evaluate_at(double input_progress, bool before_flag) const;
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String to_string() const;
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};
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struct Steps {
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enum class Position {
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JumpStart,
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JumpEnd,
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JumpNone,
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JumpBoth,
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Start,
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End,
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};
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static Steps step_start();
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static Steps step_end();
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unsigned int number_of_intervals;
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Position position { Position::End };
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bool operator==(Steps const&) const = default;
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double evaluate_at(double input_progress, bool before_flag) const;
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String to_string() const;
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};
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struct Function : public Variant<Linear, CubicBezier, Steps> {
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using Variant::Variant;
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double evaluate_at(double input_progress, bool before_flag) const;
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String to_string() const;
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};
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static ValueComparingNonnullRefPtr<EasingStyleValue const> create(Function const& function)
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{
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return adopt_ref(*new (nothrow) EasingStyleValue(function));
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}
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virtual ~EasingStyleValue() override = default;
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Function const& function() const { return m_function; }
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virtual String to_string(SerializationMode) const override { return m_function.to_string(); }
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bool properties_equal(EasingStyleValue const& other) const { return m_function == other.m_function; }
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private:
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EasingStyleValue(Function const& function)
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: StyleValueWithDefaultOperators(Type::Easing)
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, m_function(function)
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{
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}
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Function m_function;
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};
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}
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