Source/WebCore/animation/CustomEffect.cpp

/*
 * 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.
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "CustomEffect.h"

#include "CustomEffectCallback.h"
#include <JavaScriptCore/Exception.h>

namespace WebCore {
using namespace JSC;

ExceptionOr<Ref<CustomEffect>> CustomEffect::create(Ref<CustomEffectCallback>&& callback, std::optional<std::variant<double, EffectTiming>>&& options)
{
    auto customEffect = adoptRef(*new CustomEffect(WTFMove(callback)));

    if (options) {
        OptionalEffectTiming timing;
        auto optionsValue = options.value();
        if (std::holds_alternative<double>(optionsValue)) {
            std::variant<double, String> duration = std::get<double>(optionsValue);
            timing.duration = duration;
        } else {
            auto effectTimingOptions = std::get<EffectTiming>(optionsValue);

            timing = {
                effectTimingOptions.duration,
                effectTimingOptions.iterations,
                effectTimingOptions.delay,
                effectTimingOptions.endDelay,
                effectTimingOptions.iterationStart,
                effectTimingOptions.easing,
                effectTimingOptions.fill,
                effectTimingOptions.direction
            };
        }
        auto updateTimingResult = customEffect->updateTiming(timing);
        if (updateTimingResult.hasException())
            return updateTimingResult.releaseException();
    }

    return customEffect;
}

CustomEffect::CustomEffect(Ref<CustomEffectCallback>&& callback)
    : m_callback(WTFMove(callback))
{
}

void CustomEffect::animationDidTick()
{
    auto computedTiming = getComputedTiming();
    if (!computedTiming.progress)
        return;

    m_callback->handleEvent(*computedTiming.progress);
}

} // namespace WebCore