SVGAttributeAnimator.h   [plain text]

/*
 * Copyright (C) 2018-2019 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 * 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
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 */

#pragma once

#include "CSSPropertyNames.h"
#include "QualifiedName.h"
#include <wtf/RefCounted.h>
#include <wtf/StdLibExtras.h>

namespace WebCore {

class SVGElement;

enum class AnimationMode : uint8_t {
    None,
    FromTo,
    FromBy,
    To,
    By,
    Values,
    Path
};

enum class CalcMode : uint8_t {
    Discrete,
    Linear,
    Paced,
    Spline
};

class SVGAttributeAnimator : public RefCounted<SVGAttributeAnimator> {
    WTF_MAKE_FAST_ALLOCATED;
public:
    SVGAttributeAnimator(const QualifiedName& attributeName)
        : m_attributeName(attributeName)
    {
    }

    virtual ~SVGAttributeAnimator() = default;

    virtual bool isDiscrete() const { return false; }

    virtual void setFromAndToValues(SVGElement*, const String&, const String&) { }
    virtual void setFromAndByValues(SVGElement*, const String&, const String&) { }
    virtual void setToAtEndOfDurationValue(const String&) { }

    virtual void start(SVGElement*) = 0;
    virtual void animate(SVGElement*, float progress, unsigned repeatCount) = 0;
    virtual void apply(SVGElement*) = 0;
    virtual void stop(SVGElement* targetElement) = 0;

    virtual Optional<float> calculateDistance(SVGElement*, const String&, const String&) const { return { }; }

protected:
    bool isAnimatedStylePropertyAniamtor(const SVGElement*) const;

    static void invalidateStyle(SVGElement*);
    static void applyAnimatedStylePropertyChange(SVGElement*, CSSPropertyID, const String& value);
    static void removeAnimatedStyleProperty(SVGElement*, CSSPropertyID);
    static void applyAnimatedPropertyChange(SVGElement*, const QualifiedName&);

    void applyAnimatedStylePropertyChange(SVGElement*, const String& value);
    void removeAnimatedStyleProperty(SVGElement*);
    void applyAnimatedPropertyChange(SVGElement*);

    const QualifiedName& m_attributeName;
};

}