using System; using System.Collections.Generic; using System.Text; using System.Xml; using System.Drawing.Drawing2D; using System.Drawing; using System.ComponentModel; namespace Svg { /// <summary> /// An <see cref="SvgFragment"/> represents an SVG fragment that can be the root element or an embedded fragment of an SVG document. /// </summary> [SvgElement("svg")] public class SvgFragment : SvgElement, ISvgViewPort { /// <summary> /// Gets the SVG namespace string. /// </summary> public static readonly Uri Namespace = new Uri("http://www.w3.org/2000/svg"); private SvgUnit _x; private SvgUnit _y; /// <summary> /// Gets or sets the position where the left point of the svg should start. /// </summary> [SvgAttribute("x")] public SvgUnit X { get { return _x; } set { if(_x != value) { _x = value; OnAttributeChanged(new AttributeEventArgs{ Attribute = "x", Value = value }); } } } /// <summary> /// Gets or sets the position where the top point of the svg should start. /// </summary> [SvgAttribute("y")] public SvgUnit Y { get { return _y; } set { if(_y != value) { _y = value; OnAttributeChanged(new AttributeEventArgs{ Attribute = "y", Value = value }); } } } /// <summary> /// Gets or sets the width of the fragment. /// </summary> /// <value>The width.</value> [SvgAttribute("width")] public SvgUnit Width { get { return this.Attributes.GetAttribute<SvgUnit>("width"); } set { this.Attributes["width"] = value; } } /// <summary> /// Gets or sets the height of the fragment. /// </summary> /// <value>The height.</value> [SvgAttribute("height")] public SvgUnit Height { get { return this.Attributes.GetAttribute<SvgUnit>("height"); } set { this.Attributes["height"] = value; } } [SvgAttribute("overflow")] public virtual SvgOverflow Overflow { get { return this.Attributes.GetAttribute<SvgOverflow>("overflow"); } set { this.Attributes["overflow"] = value; } } /// <summary> /// Gets or sets the viewport of the element. /// </summary> /// <value></value> [SvgAttribute("viewBox")] public SvgViewBox ViewBox { get { return this.Attributes.GetAttribute<SvgViewBox>("viewBox"); } set { this.Attributes["viewBox"] = value; } } /// <summary> /// Gets or sets the aspect of the viewport. /// </summary> /// <value></value> [SvgAttribute("preserveAspectRatio")] public SvgAspectRatio AspectRatio { get { return this.Attributes.GetAttribute<SvgAspectRatio>("preserveAspectRatio"); } set { this.Attributes["preserveAspectRatio"] = value; } } /// <summary> /// Applies the required transforms to <see cref="SvgRenderer"/>. /// </summary> /// <param name="renderer">The <see cref="SvgRenderer"/> to be transformed.</param> protected internal override void PushTransforms(SvgRenderer renderer) { base.PushTransforms(renderer); if (!this.ViewBox.Equals(SvgViewBox.Empty)) { float fScaleX = this.Width.ToDeviceValue() / this.ViewBox.Width; float fScaleY = this.Height.ToDeviceValue() / this.ViewBox.Height; float fMinX = -this.ViewBox.MinX; float fMinY = -this.ViewBox.MinY; if (AspectRatio.Align != SvgPreserveAspectRatio.none) { if (AspectRatio.Slice) { fScaleX = Math.Max(fScaleX, fScaleY); fScaleY = Math.Max(fScaleX, fScaleY); } else { fScaleX = Math.Min(fScaleX, fScaleY); fScaleY = Math.Min(fScaleX, fScaleY); } float fViewMidX = (this.ViewBox.Width / 2) * fScaleX; float fViewMidY = (this.ViewBox.Height / 2) * fScaleY; float fMidX = this.Width.ToDeviceValue() / 2; float fMidY = this.Height.ToDeviceValue() / 2; switch (AspectRatio.Align) { case SvgPreserveAspectRatio.xMinYMin: break; case SvgPreserveAspectRatio.xMidYMin: fMinX += (fMidX - fViewMidX) / fScaleX; break; case SvgPreserveAspectRatio.xMaxYMin: fMinX += (this.Width.ToDeviceValue() / fScaleX) - this.ViewBox.Width; break; case SvgPreserveAspectRatio.xMinYMid: fMinY += (fMidY - fViewMidY) / fScaleY; break; case SvgPreserveAspectRatio.xMidYMid: fMinX += (fMidX - fViewMidX) / fScaleX; fMinY += (fMidY - fViewMidY) / fScaleY; break; case SvgPreserveAspectRatio.xMaxYMid: fMinX += (this.Width.ToDeviceValue() / fScaleX) - this.ViewBox.Width; fMinY += (fMidY - fViewMidY) / fScaleY; break; case SvgPreserveAspectRatio.xMinYMax: fMinY += (this.Height.ToDeviceValue() / fScaleY) - this.ViewBox.Height; break; case SvgPreserveAspectRatio.xMidYMax: fMinX += (fMidX - fViewMidX) / fScaleX; fMinY += (this.Height.ToDeviceValue() / fScaleY) - this.ViewBox.Height; break; case SvgPreserveAspectRatio.xMaxYMax: fMinX += (this.Width.ToDeviceValue() / fScaleX) - this.ViewBox.Width; fMinY += (this.Height.ToDeviceValue() / fScaleY) - this.ViewBox.Height; break; default: break; } } renderer.TranslateTransform(_x, _y); renderer.TranslateTransform(fMinX, fMinY); renderer.ScaleTransform(fScaleX, fScaleY); } } /// <summary> /// Gets the <see cref="GraphicsPath"/> for this element. /// </summary> /// <value></value> public GraphicsPath Path { get { var path = new GraphicsPath(); AddPaths(this, path); return path; } } /// <summary> /// Gets the bounds of the svg element. /// </summary> /// <value>The bounds.</value> public RectangleF Bounds { get { return this.Path.GetBounds(); } } /// <summary> /// Initializes a new instance of the <see cref="SvgFragment"/> class. /// </summary> public SvgFragment() { _x = 0.0f; _y = 0.0f; this.Height = new SvgUnit(SvgUnitType.Percentage, 100.0f); this.Width = new SvgUnit(SvgUnitType.Percentage, 100.0f); this.ViewBox = SvgViewBox.Empty; this.AspectRatio = new SvgAspectRatio(SvgPreserveAspectRatio.xMidYMid); } public override SvgElement DeepCopy() { return DeepCopy<SvgFragment>(); } public override SvgElement DeepCopy<T>() { var newObj = base.DeepCopy<T>() as SvgFragment; newObj.Height = this.Height; newObj.Width = this.Width; newObj.Overflow = this.Overflow; newObj.ViewBox = this.ViewBox; newObj.AspectRatio = this.AspectRatio; return newObj; } } }