Defer compositor keyframe snapshots until the next style resolve

third_party/WebKit/Source/core/animation/DeferredLegacyStyleInterpolation.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "core/animation/DeferredLegacyStyleInterpolation.h"
-
-#include "core/css/CSSBasicShapeValues.h"
-#include "core/css/CSSImageValue.h"
-#include "core/css/CSSPrimitiveValue.h"
-#include "core/css/CSSQuadValue.h"
-#include "core/css/CSSSVGDocumentValue.h"
-#include "core/css/CSSShadowValue.h"
-#include "core/css/CSSValueList.h"
-#include "core/css/CSSValuePair.h"
-
-namespace blink {
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSValue& value)
-{
-    // FIXME: should not require resolving styles for inherit/initial/unset.
-    if (value.isCSSWideKeyword())
-        return true;
-    if (value.isBasicShapeCircleValue())
-        return interpolationRequiresStyleResolve(toCSSBasicShapeCircleValue(value));
-    if (value.isBasicShapeEllipseValue())
-        return interpolationRequiresStyleResolve(toCSSBasicShapeEllipseValue(value));
-    if (value.isBasicShapePolygonValue())
-        return interpolationRequiresStyleResolve(toCSSBasicShapePolygonValue(value));
-    if (value.isBasicShapeInsetValue())
-        return interpolationRequiresStyleResolve(toCSSBasicShapeInsetValue(value));
-    if (value.isColorValue())
-        return false;
-    if (value.isStringValue() || value.isURIValue() || value.isCustomIdentValue())
-        return false;
-    if (value.isPrimitiveValue())
-        return interpolationRequiresStyleResolve(toCSSPrimitiveValue(value));
-    if (value.isQuadValue())
-        return interpolationRequiresStyleResolve(toCSSQuadValue(value));
-    if (value.isValueList())
-        return interpolationRequiresStyleResolve(toCSSValueList(value));
-    if (value.isValuePair())
-        return interpolationRequiresStyleResolve(toCSSValuePair(value));
-    if (value.isImageValue())
-        return interpolationRequiresStyleResolve(toCSSImageValue(value));
-    if (value.isShadowValue())
-        return interpolationRequiresStyleResolve(toCSSShadowValue(value));
-    if (value.isSVGDocumentValue())
-        return interpolationRequiresStyleResolve(toCSSSVGDocumentValue(value));
-    // FIXME: consider other custom types.
-    return true;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSPrimitiveValue& primitiveValue)
-{
-    // FIXME: consider other types.
-    if (primitiveValue.isNumber() || primitiveValue.isPercentage() || primitiveValue.isAngle())
-        return false;
-
-    if (primitiveValue.isLength())
-        return primitiveValue.isFontRelativeLength() || primitiveValue.isViewportPercentageLength();
-
-    if (primitiveValue.isCalculated()) {
-        CSSLengthArray lengthArray;
-        primitiveValue.accumulateLengthArray(lengthArray);
-        return lengthArray.values[CSSPrimitiveValue::UnitTypeFontSize] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeFontXSize] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeRootFontSize] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeZeroCharacterWidth] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeViewportWidth] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeViewportHeight] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeViewportMin] != 0
-            || lengthArray.values[CSSPrimitiveValue::UnitTypeViewportMax] != 0;
-    }
-
-    CSSValueID id = primitiveValue.getValueID();
-    bool isColor = ((id >= CSSValueAqua && id <= CSSValueTransparent)
-        || (id >= CSSValueAliceblue && id <= CSSValueYellowgreen)
-        || id == CSSValueGrey);
-    return (id != CSSValueNone) && !isColor;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSImageValue& imageValue)
-{
-    return false;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSShadowValue& shadowValue)
-{
-    return (shadowValue.x && interpolationRequiresStyleResolve(*shadowValue.x))
-        || (shadowValue.y && interpolationRequiresStyleResolve(*shadowValue.y))
-        || (shadowValue.blur && interpolationRequiresStyleResolve(*shadowValue.blur))
-        || (shadowValue.spread && interpolationRequiresStyleResolve(*shadowValue.spread))
-        || (shadowValue.style && interpolationRequiresStyleResolve(*shadowValue.style))
-        || (shadowValue.color && interpolationRequiresStyleResolve(*shadowValue.color));
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSSVGDocumentValue& documentValue)
-{
-    return true;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSValueList& valueList)
-{
-    size_t length = valueList.length();
-    for (size_t index = 0; index < length; ++index) {
-        if (interpolationRequiresStyleResolve(valueList.item(index)))
-            return true;
-    }
-    return false;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSValuePair& pair)
-{
-    return interpolationRequiresStyleResolve(pair.first())
-        || interpolationRequiresStyleResolve(pair.second());
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSBasicShapeCircleValue& shape)
-{
-    // FIXME: Should inspect the members.
-    return false;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSBasicShapeEllipseValue& shape)
-{
-    // FIXME: Should inspect the members.
-    return false;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSBasicShapePolygonValue& shape)
-{
-    // FIXME: Should inspect the members.
-    return false;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSBasicShapeInsetValue& shape)
-{
-    // FIXME: Should inspect the members.
-    return false;
-}
-
-bool DeferredLegacyStyleInterpolation::interpolationRequiresStyleResolve(const CSSQuadValue& quad)
-{
-    return interpolationRequiresStyleResolve(*quad.top())
-        || interpolationRequiresStyleResolve(*quad.right())
-        || interpolationRequiresStyleResolve(*quad.bottom())
-        || interpolationRequiresStyleResolve(*quad.left());
-}
-
-} // namespace blink