コード例 #1
0
        public static UseDrawable Create(SvgUse svgUse, Rect skOwnerBounds, DrawableBase?parent, IAssetLoader assetLoader, Attributes ignoreAttributes = Attributes.None)
        {
            var drawable = new UseDrawable(assetLoader)
            {
                Element          = svgUse,
                Parent           = parent,
                IgnoreAttributes = ignoreAttributes
            };

            drawable.IsDrawable = drawable.CanDraw(svgUse, drawable.IgnoreAttributes) && drawable.HasFeatures(svgUse, drawable.IgnoreAttributes);

            if (!drawable.IsDrawable)
            {
                return(drawable);
            }

            if (SvgModelExtensions.HasRecursiveReference(svgUse, (e) => e.ReferencedElement, new HashSet <Uri>()))
            {
                drawable.IsDrawable = false;
                return(drawable);
            }

            var svgReferencedElement = SvgModelExtensions.GetReference <SvgElement>(svgUse, svgUse.ReferencedElement);

            if (svgReferencedElement is null)
            {
                drawable.IsDrawable = false;
                return(drawable);
            }

            var x      = svgUse.X.ToDeviceValue(UnitRenderingType.Horizontal, svgUse, skOwnerBounds);
            var y      = svgUse.Y.ToDeviceValue(UnitRenderingType.Vertical, svgUse, skOwnerBounds);
            var width  = svgUse.Width.ToDeviceValue(UnitRenderingType.Horizontal, svgUse, skOwnerBounds);
            var height = svgUse.Height.ToDeviceValue(UnitRenderingType.Vertical, svgUse, skOwnerBounds);

            if (width <= 0f)
            {
                width = new SvgUnit(SvgUnitType.Percentage, 100f).ToDeviceValue(UnitRenderingType.Horizontal, svgUse, skOwnerBounds);
            }

            if (height <= 0f)
            {
                height = new SvgUnit(SvgUnitType.Percentage, 100f).ToDeviceValue(UnitRenderingType.Vertical, svgUse, skOwnerBounds);
            }

            var originalReferencedElementParent = svgReferencedElement.Parent;

            try
            {
                if (s_referencedElementParent is { })
                {
                    s_referencedElementParent.SetValue(svgReferencedElement, svgUse);
                }
            }