C++ RenderStyle::backgroundLayers方法代码示例

bool RenderTheme::isControlStyled(const RenderStyle& style, const BorderData& border, const FillLayer& background, const Color& backgroundColor) const
{
    switch (style.appearance()) {
    case PushButtonPart:
    case SquareButtonPart:
    case DefaultButtonPart:
    case ButtonPart:
    case ListboxPart:
    case MenulistPart:
    case ProgressBarPart:
    case MeterPart:
    case RelevancyLevelIndicatorPart:
    case ContinuousCapacityLevelIndicatorPart:
    case DiscreteCapacityLevelIndicatorPart:
    case RatingLevelIndicatorPart:
    // FIXME: SearchFieldPart should be included here when making search fields style-able.
    case TextFieldPart:
    case TextAreaPart:
        // Test the style to see if the UA border and background match.
        return (style.border() != border
            || *style.backgroundLayers() != background
            || style.visitedDependentColor(CSSPropertyBackgroundColor) != backgroundColor);
    default:
        return false;
    }
}

static bool isBackgroundOrBorderStyled(const RenderStyle& style, const CachedUAStyle& uaStyle)
{
    // Code below excludes the background-repeat from comparison by resetting it
    FillLayer backgroundCopy = uaStyle.backgroundLayers;
    FillLayer backgroundLayersCopy = *style.backgroundLayers();
    backgroundCopy.setRepeatX(NoRepeatFill);
    backgroundCopy.setRepeatY(NoRepeatFill);
    backgroundLayersCopy.setRepeatX(NoRepeatFill);
    backgroundLayersCopy.setRepeatY(NoRepeatFill);
    // Test the style to see if the UA border and background match.
    return style.border() != uaStyle.border
        || backgroundLayersCopy != backgroundCopy
        || style.visitedDependentColor(CSSPropertyBackgroundColor) != uaStyle.backgroundColor;
}

static bool isDeletableElement(const Node* node)
{
    if (!node || !node->isHTMLElement() || !node->inDocument() || !node->rendererIsEditable())
        return false;

    // In general we want to only draw the UI around object of a certain area, but we still keep the min width/height to
    // make sure we don't end up with very thin or very short elements getting the UI.
    const int minimumArea = 2500;
    const int minimumWidth = 48;
    const int minimumHeight = 16;
    const unsigned minimumVisibleBorders = 1;

    RenderObject* renderer = node->renderer();
    if (!renderer || !renderer->isBox())
        return false;

    // Disallow the body element since it isn't practical to delete, and the deletion UI would be clipped.
    if (node->hasTagName(bodyTag))
        return false;

    // Disallow elements with any overflow clip, since the deletion UI would be clipped as well. <rdar://problem/6840161>
    if (renderer->hasOverflowClip())
        return false;

    // Disallow Mail blockquotes since the deletion UI would get in the way of editing for these.
    if (isMailBlockquote(node))
        return false;

    RenderBox* box = toRenderBox(renderer);
    IntRect borderBoundingBox = box->borderBoundingBox();
    if (borderBoundingBox.width() < minimumWidth || borderBoundingBox.height() < minimumHeight)
        return false;

    if ((borderBoundingBox.width() * borderBoundingBox.height()) < minimumArea)
        return false;

    if (renderer->isTable())
        return true;

    if (node->hasTagName(ulTag) || node->hasTagName(olTag) || node->hasTagName(iframeTag))
        return true;

    if (renderer->isOutOfFlowPositioned())
        return true;

    if (renderer->isRenderBlock() && !renderer->isTableCell()) {
        RenderStyle* style = renderer->style();
        if (!style)
            return false;

        // Allow blocks that have background images
        if (style->hasBackgroundImage()) {
            for (const FillLayer* background = style->backgroundLayers(); background; background = background->next()) {
                if (background->image() && background->image()->canRender(renderer, 1))
                    return true;
            }
        }

        // Allow blocks with a minimum number of non-transparent borders
        unsigned visibleBorders = style->borderTop().isVisible() + style->borderBottom().isVisible() + style->borderLeft().isVisible() + style->borderRight().isVisible();
        if (visibleBorders >= minimumVisibleBorders)
            return true;

        // Allow blocks that have a different background from it's parent
        ContainerNode* parentNode = node->parentNode();
        if (!parentNode)
            return false;

        RenderObject* parentRenderer = parentNode->renderer();
        if (!parentRenderer)
            return false;

        RenderStyle* parentStyle = parentRenderer->style();
        if (!parentStyle)
            return false;

        if (renderer->hasBackground() && (!parentRenderer->hasBackground() || style->visitedDependentColor(CSSPropertyBackgroundColor) != parentStyle->visitedDependentColor(CSSPropertyBackgroundColor)))
            return true;
    }

    return false;
}

bool CSSPropertyEquality::propertiesEqual(CSSPropertyID prop, const RenderStyle& a, const RenderStyle& b)
{
    switch (prop) {
    case CSSPropertyBackgroundColor:
        return a.backgroundColor().resolve(a.color()) == b.backgroundColor().resolve(b.color())
            && a.visitedLinkBackgroundColor().resolve(a.color()) == b.visitedLinkBackgroundColor().resolve(b.color());
    case CSSPropertyBackgroundImage:
        return fillLayersEqual<CSSPropertyBackgroundImage>(a.backgroundLayers(), b.backgroundLayers());
    case CSSPropertyBackgroundPositionX:
        return fillLayersEqual<CSSPropertyBackgroundPositionX>(a.backgroundLayers(), b.backgroundLayers());
    case CSSPropertyBackgroundPositionY:
        return fillLayersEqual<CSSPropertyBackgroundPositionY>(a.backgroundLayers(), b.backgroundLayers());
    case CSSPropertyBackgroundSize:
        return fillLayersEqual<CSSPropertyBackgroundSize>(a.backgroundLayers(), b.backgroundLayers());
    case CSSPropertyBaselineShift:
        return dataEquivalent(a.baselineShiftValue(), b.baselineShiftValue());
    case CSSPropertyBorderBottomColor:
        return a.borderBottomColor().resolve(a.color()) == b.borderBottomColor().resolve(b.color())
            && a.visitedLinkBorderBottomColor().resolve(a.color()) == b.visitedLinkBorderBottomColor().resolve(b.color());
    case CSSPropertyBorderBottomLeftRadius:
        return a.borderBottomLeftRadius() == b.borderBottomLeftRadius();
    case CSSPropertyBorderBottomRightRadius:
        return a.borderBottomRightRadius() == b.borderBottomRightRadius();
    case CSSPropertyBorderBottomWidth:
        return a.borderBottomWidth() == b.borderBottomWidth();
    case CSSPropertyBorderImageOutset:
        return a.borderImageOutset() == b.borderImageOutset();
    case CSSPropertyBorderImageSlice:
        return a.borderImageSlices() == b.borderImageSlices();
    case CSSPropertyBorderImageSource:
        return dataEquivalent(a.borderImageSource(), b.borderImageSource());
    case CSSPropertyBorderImageWidth:
        return a.borderImageWidth() == b.borderImageWidth();
    case CSSPropertyBorderLeftColor:
        return a.borderLeftColor().resolve(a.color()) == b.borderLeftColor().resolve(b.color())
            && a.visitedLinkBorderLeftColor().resolve(a.color()) == b.visitedLinkBorderLeftColor().resolve(b.color());
    case CSSPropertyBorderLeftWidth:
        return a.borderLeftWidth() == b.borderLeftWidth();
    case CSSPropertyBorderRightColor:
        return a.borderRightColor().resolve(a.color()) == b.borderRightColor().resolve(b.color())
            && a.visitedLinkBorderRightColor().resolve(a.color()) == b.visitedLinkBorderRightColor().resolve(b.color());
    case CSSPropertyBorderRightWidth:
        return a.borderRightWidth() == b.borderRightWidth();
    case CSSPropertyBorderTopColor:
        return a.borderTopColor().resolve(a.color()) == b.borderTopColor().resolve(b.color())
            && a.visitedLinkBorderTopColor().resolve(a.color()) == b.visitedLinkBorderTopColor().resolve(b.color());
    case CSSPropertyBorderTopLeftRadius:
        return a.borderTopLeftRadius() == b.borderTopLeftRadius();
    case CSSPropertyBorderTopRightRadius:
        return a.borderTopRightRadius() == b.borderTopRightRadius();
    case CSSPropertyBorderTopWidth:
        return a.borderTopWidth() == b.borderTopWidth();
    case CSSPropertyBottom:
        return a.bottom() == b.bottom();
    case CSSPropertyBoxShadow:
        return dataEquivalent(a.boxShadow(), b.boxShadow());
    case CSSPropertyClip:
        return a.clip() == b.clip();
    case CSSPropertyColor:
        return a.color() == b.color() && a.visitedLinkColor() == b.visitedLinkColor();
    case CSSPropertyFill:
        return a.fillPaintType() == b.fillPaintType()
            && (a.fillPaintType() != SVGPaint::SVG_PAINTTYPE_RGBCOLOR || a.fillPaintColor() == b.fillPaintColor());
    case CSSPropertyFillOpacity:
        return a.fillOpacity() == b.fillOpacity();
    case CSSPropertyFlexBasis:
        return a.flexBasis() == b.flexBasis();
    case CSSPropertyFlexGrow:
        return a.flexGrow() == b.flexGrow();
    case CSSPropertyFlexShrink:
        return a.flexShrink() == b.flexShrink();
    case CSSPropertyFloodColor:
        return a.floodColor() == b.floodColor();
    case CSSPropertyFloodOpacity:
        return a.floodOpacity() == b.floodOpacity();
    case CSSPropertyFontSize:
        // CSSPropertyFontSize: Must pass a specified size to setFontSize if Text Autosizing is enabled, but a computed size
        // if text zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
        // FIXME: Should we introduce an option to pass the computed font size here, allowing consumers to
        // enable text zoom rather than Text Autosizing? See http://crbug.com/227545.
        return a.specifiedFontSize() == b.specifiedFontSize();
    case CSSPropertyFontWeight:
        return a.fontWeight() == b.fontWeight();
    case CSSPropertyHeight:
        return a.height() == b.height();
    case CSSPropertyLeft:
        return a.left() == b.left();
    case CSSPropertyLetterSpacing:
        return a.letterSpacing() == b.letterSpacing();
    case CSSPropertyLightingColor:
        return a.lightingColor() == b.lightingColor();
    case CSSPropertyLineHeight:
        return a.specifiedLineHeight() == b.specifiedLineHeight();
    case CSSPropertyListStyleImage:
        return dataEquivalent(a.listStyleImage(), b.listStyleImage());
    case CSSPropertyMarginBottom:
        return a.marginBottom() == b.marginBottom();
    case CSSPropertyMarginLeft:
        return a.marginLeft() == b.marginLeft();
    case CSSPropertyMarginRight:
//.........这里部分代码省略.........

// FIXME: Generate this function.
PassRefPtr<AnimatableValue> CSSAnimatableValueFactory::create(CSSPropertyID property, const RenderStyle& style)
{
    ASSERT(CSSPropertyMetadata::isAnimatableProperty(property));
    switch (property) {
    case CSSPropertyBackgroundColor:
        return createFromColor(property, style);
    case CSSPropertyBackgroundImage:
        return createFromFillLayers<CSSPropertyBackgroundImage>(style.backgroundLayers(), style);
    case CSSPropertyBackgroundPositionX:
        return createFromFillLayers<CSSPropertyBackgroundPositionX>(style.backgroundLayers(), style);
    case CSSPropertyBackgroundPositionY:
        return createFromFillLayers<CSSPropertyBackgroundPositionY>(style.backgroundLayers(), style);
    case CSSPropertyBackgroundSize:
    case CSSPropertyWebkitBackgroundSize:
        return createFromFillLayers<CSSPropertyBackgroundSize>(style.backgroundLayers(), style);
    case CSSPropertyBorderBottomColor:
        return createFromColor(property, style);
    case CSSPropertyBorderBottomLeftRadius:
        return createFromLengthSize(style.borderBottomLeftRadius(), style);
    case CSSPropertyBorderBottomRightRadius:
        return createFromLengthSize(style.borderBottomRightRadius(), style);
    case CSSPropertyBorderBottomWidth:
        return createFromDouble(style.borderBottomWidth());
    case CSSPropertyBorderImageOutset:
        return createFromBorderImageLengthBox(style.borderImageOutset(), style);
    case CSSPropertyBorderImageSlice:
        return createFromLengthBox(style.borderImageSlices(), style);
    case CSSPropertyBorderImageSource:
        return createFromStyleImage(style.borderImageSource());
    case CSSPropertyBorderImageWidth:
        return createFromBorderImageLengthBox(style.borderImageWidth(), style);
    case CSSPropertyBorderLeftColor:
        return createFromColor(property, style);
    case CSSPropertyBorderLeftWidth:
        return createFromDouble(style.borderLeftWidth());
    case CSSPropertyBorderRightColor:
        return createFromColor(property, style);
    case CSSPropertyBorderRightWidth:
        return createFromDouble(style.borderRightWidth());
    case CSSPropertyBorderTopColor:
        return createFromColor(property, style);
    case CSSPropertyBorderTopLeftRadius:
        return createFromLengthSize(style.borderTopLeftRadius(), style);
    case CSSPropertyBorderTopRightRadius:
        return createFromLengthSize(style.borderTopRightRadius(), style);
    case CSSPropertyBorderTopWidth:
        return createFromDouble(style.borderTopWidth());
    case CSSPropertyBottom:
        return createFromLength(style.bottom(), style);
    case CSSPropertyBoxShadow:
    case CSSPropertyWebkitBoxShadow:
        return AnimatableShadow::create(style.boxShadow());
    case CSSPropertyClip:
        if (style.hasAutoClip())
            return AnimatableUnknown::create(CSSPrimitiveValue::create(CSSValueAuto));
        return createFromLengthBox(style.clip(), style);
    case CSSPropertyColor:
        return createFromColor(property, style);
    case CSSPropertyFilter:
        return AnimatableFilterOperations::create(style.filter());
    case CSSPropertyFlexGrow:
        return createFromDouble(style.flexGrow(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
    case CSSPropertyFlexShrink:
        return createFromDouble(style.flexShrink(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
    case CSSPropertyFlexBasis:
        return createFromLength(style.flexBasis(), style);
    case CSSPropertyFontSize:
        // Must pass a specified size to setFontSize if Text Autosizing is enabled, but a computed size
        // if text zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
        // FIXME: Should we introduce an option to pass the computed font size here, allowing consumers to
        // enable text zoom rather than Text Autosizing? See http://crbug.com/227545.
        return createFromDouble(style.specifiedFontSize());
    case CSSPropertyFontStretch:
        return createFromFontStretch(style.fontStretch());
    case CSSPropertyFontWeight:
        return createFromFontWeight(style.fontWeight());
    case CSSPropertyHeight:
        return createFromLength(style.height(), style);
    case CSSPropertyLeft:
        return createFromLength(style.left(), style);
    case CSSPropertyLetterSpacing:
        return createFromDouble(style.letterSpacing());
    case CSSPropertyLineHeight:
        return createFromLineHeight(style.specifiedLineHeight(), style);
    case CSSPropertyMarginBottom:
        return createFromLength(style.marginBottom(), style);
    case CSSPropertyMarginLeft:
        return createFromLength(style.marginLeft(), style);
    case CSSPropertyMarginRight:
        return createFromLength(style.marginRight(), style);
    case CSSPropertyMarginTop:
        return createFromLength(style.marginTop(), style);
    case CSSPropertyMaxHeight:
        return createFromLength(style.maxHeight(), style);
    case CSSPropertyMaxWidth:
        return createFromLength(style.maxWidth(), style);
    case CSSPropertyMinHeight:
        return createFromLength(style.minHeight(), style);
    case CSSPropertyMinWidth:
//.........这里部分代码省略.........

// FIXME: Generate this function.
PassRefPtr<AnimatableValue> CSSAnimatableValueFactory::create(CSSPropertyID property, const RenderStyle& style)
{
    switch (property) {
    case CSSPropertyBackgroundColor:
        return createFromColor(property, style);
    case CSSPropertyBackgroundImage:
        return createFromFillLayers<CSSPropertyBackgroundImage>(style.backgroundLayers(), style);
    case CSSPropertyBackgroundPositionX:
        return createFromFillLayers<CSSPropertyBackgroundPositionX>(style.backgroundLayers(), style);
    case CSSPropertyBackgroundPositionY:
        return createFromFillLayers<CSSPropertyBackgroundPositionY>(style.backgroundLayers(), style);
    case CSSPropertyBackgroundSize:
    case CSSPropertyWebkitBackgroundSize:
        return createFromFillLayers<CSSPropertyBackgroundSize>(style.backgroundLayers(), style);
    case CSSPropertyBaselineShift:
        return AnimatableSVGLength::create(style.baselineShiftValue());
    case CSSPropertyBorderBottomColor:
        return createFromColor(property, style);
    case CSSPropertyBorderBottomLeftRadius:
        return createFromLengthSize(style.borderBottomLeftRadius(), style);
    case CSSPropertyBorderBottomRightRadius:
        return createFromLengthSize(style.borderBottomRightRadius(), style);
    case CSSPropertyBorderBottomWidth:
        return createFromDouble(style.borderBottomWidth());
    case CSSPropertyBorderImageOutset:
        return createFromBorderImageLengthBox(style.borderImageOutset(), style);
    case CSSPropertyBorderImageSlice:
        return createFromLengthBox(style.borderImageSlices(), style);
    case CSSPropertyBorderImageSource:
        return createFromStyleImage(style.borderImageSource());
    case CSSPropertyBorderImageWidth:
        return createFromBorderImageLengthBox(style.borderImageWidth(), style);
    case CSSPropertyBorderLeftColor:
        return createFromColor(property, style);
    case CSSPropertyBorderLeftWidth:
        return createFromDouble(style.borderLeftWidth());
    case CSSPropertyBorderRightColor:
        return createFromColor(property, style);
    case CSSPropertyBorderRightWidth:
        return createFromDouble(style.borderRightWidth());
    case CSSPropertyBorderTopColor:
        return createFromColor(property, style);
    case CSSPropertyBorderTopLeftRadius:
        return createFromLengthSize(style.borderTopLeftRadius(), style);
    case CSSPropertyBorderTopRightRadius:
        return createFromLengthSize(style.borderTopRightRadius(), style);
    case CSSPropertyBorderTopWidth:
        return createFromDouble(style.borderTopWidth());
    case CSSPropertyBottom:
        return createFromLength(style.bottom(), style);
    case CSSPropertyBoxShadow:
    case CSSPropertyWebkitBoxShadow:
        return AnimatableShadow::create(style.boxShadow());
    case CSSPropertyClip:
        if (style.hasClip())
            return createFromLengthBox(style.clip(), style);
        return AnimatableUnknown::create(CSSPrimitiveValue::create(CSSValueAuto));
    case CSSPropertyColor:
        return createFromColor(property, style);
    case CSSPropertyFillOpacity:
        return createFromDouble(style.fillOpacity());
    case CSSPropertyFill:
        return AnimatableSVGPaint::create(style.svgStyle()->fillPaintType(), style.svgStyle()->fillPaintColor(), style.svgStyle()->fillPaintUri());
    case CSSPropertyFlexGrow:
        return createFromDouble(style.flexGrow(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
    case CSSPropertyFlexShrink:
        return createFromDouble(style.flexShrink(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
    case CSSPropertyFlexBasis:
        return createFromLength(style.flexBasis(), style);
    case CSSPropertyFloodColor:
        return createFromColor(property, style);
    case CSSPropertyFloodOpacity:
        return createFromDouble(style.floodOpacity());
    case CSSPropertyFontSize:
        // Must pass a specified size to setFontSize if Text Autosizing is enabled, but a computed size
        // if text zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
        // FIXME: Should we introduce an option to pass the computed font size here, allowing consumers to
        // enable text zoom rather than Text Autosizing? See http://crbug.com/227545.
        return createFromDouble(style.specifiedFontSize());
    case CSSPropertyHeight:
        return createFromLength(style.height(), style);
    case CSSPropertyKerning:
        return AnimatableSVGLength::create(style.kerning());
    case CSSPropertyLightingColor:
        return createFromColor(property, style);
    case CSSPropertyListStyleImage:
        return createFromStyleImage(style.listStyleImage());
    case CSSPropertyLeft:
        return createFromLength(style.left(), style);
    case CSSPropertyLetterSpacing:
        return createFromDouble(style.letterSpacing());
    case CSSPropertyLineHeight:
        return createFromLineHeight(style.specifiedLineHeight(), style);
    case CSSPropertyMarginBottom:
        return createFromLength(style.marginBottom(), style);
    case CSSPropertyMarginLeft:
        return createFromLength(style.marginLeft(), style);
    case CSSPropertyMarginRight:
        return createFromLength(style.marginRight(), style);
//.........这里部分代码省略.........