root/Source/core/animation/EffectInput.cpp

DEFINITIONS

1. checkDocumentAndRenderer
2. convert

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "core/animation/EffectInput.h"

#include "bindings/v8/Dictionary.h"
#include "core/animation/AnimationHelpers.h"
#include "core/animation/css/CSSAnimations.h"
#include "core/css/parser/BisonCSSParser.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Element.h"

namespace WebCore {

static bool checkDocumentAndRenderer(Element* element)
{
    if (!element->inActiveDocument())
        return false;
    element->document().updateRenderTreeIfNeeded();
    return element->renderer();
}

PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, const Vector<Dictionary>& keyframeDictionaryVector,  ExceptionState& exceptionState, bool unsafe)
{
    // FIXME: This test will not be neccessary once resolution of keyframe values occurs at
    // animation application time.
    if (!unsafe && !checkDocumentAndRenderer(element))
        return nullptr;

    StyleSheetContents* styleSheetContents = element->document().elementSheet().contents();

    // FIXME: Move this code into KeyframeEffectModel, it will be used by the IDL constructor for that class.
    AnimatableValueKeyframeVector keyframes;
    WillBeHeapVector<RefPtrWillBeMember<MutableStylePropertySet> > propertySetVector;

    for (size_t i = 0; i < keyframeDictionaryVector.size(); ++i) {
        RefPtrWillBeRawPtr<MutableStylePropertySet> propertySet = MutableStylePropertySet::create();
        propertySetVector.append(propertySet);

        RefPtrWillBeRawPtr<AnimatableValueKeyframe> keyframe = AnimatableValueKeyframe::create();
        keyframes.append(keyframe);

        double offset;
        if (keyframeDictionaryVector[i].get("offset", offset))
            keyframe->setOffset(offset);

        String compositeString;
        keyframeDictionaryVector[i].get("composite", compositeString);
        if (compositeString == "add")
            keyframe->setComposite(AnimationEffect::CompositeAdd);

        String timingFunctionString;
        if (keyframeDictionaryVector[i].get("easing", timingFunctionString)) {
            RefPtrWillBeRawPtr<CSSValue> timingFunctionValue = BisonCSSParser::parseAnimationTimingFunctionValue(timingFunctionString);
            if (timingFunctionValue)
                keyframe->setEasing(CSSToStyleMap::animationTimingFunction(timingFunctionValue.get(), false));
        }

        Vector<String> keyframeProperties;
        keyframeDictionaryVector[i].getOwnPropertyNames(keyframeProperties);

        for (size_t j = 0; j < keyframeProperties.size(); ++j) {
            String property = keyframeProperties[j];
            CSSPropertyID id = camelCaseCSSPropertyNameToID(property);

            // FIXME: There is no way to store invalid properties or invalid values
            // in a Keyframe object, so for now I just skip over them. Eventually we
            // will need to support getFrames(), which should return exactly the
            // keyframes that were input through the API. We will add a layer to wrap
            // KeyframeEffectModel, store input keyframes and implement getFrames.
            if (id == CSSPropertyInvalid || !CSSAnimations::isAnimatableProperty(id))
                continue;

            String value;
            keyframeDictionaryVector[i].get(property, value);
            propertySet->setProperty(id, value, false, styleSheetContents);
        }
    }

    // FIXME: Replace this with code that just parses, when that code is available.
    RefPtrWillBeRawPtr<AnimatableValueKeyframeEffectModel> keyframeEffectModel = StyleResolver::createKeyframeEffectModel(*element, propertySetVector, keyframes);
    if (!keyframeEffectModel->isReplaceOnly()) {
        exceptionState.throwDOMException(NotSupportedError, "Partial keyframes are not supported.");
        return nullptr;
    }

    return keyframeEffectModel;
}

} // namespace WebCore