SvgUse.cs 3.43 KB
Newer Older
davescriven's avatar
davescriven committed
1
2
using System;
using System.Collections.Generic;
Dan Backes's avatar
Dan Backes committed
3
using System.Drawing;
davescriven's avatar
davescriven committed
4
5
6
7
using System.Text;
using System.Web;
using System.Xml;
using System.Xml.Serialization;
8
using System.Drawing.Drawing2D;
davescriven's avatar
davescriven committed
9
10
11

namespace Svg
{
12
    [SvgElement("use")]
13
    public class SvgUse : SvgVisualElement
davescriven's avatar
davescriven committed
14
15
16
    {
        private Uri _referencedElement;

Eric Domke's avatar
Eric Domke committed
17
        [SvgAttribute("href", SvgAttributeAttribute.XLinkNamespace)]
davescriven's avatar
davescriven committed
18
19
20
21
22
23
        public virtual Uri ReferencedElement
        {
            get { return this._referencedElement; }
            set { this._referencedElement = value; }
        }

24
25
26
27
28
29
30
31
32
33
34
35
36
37
        [SvgAttribute("x")]
        public virtual SvgUnit X
        {
            get { return this.Attributes.GetAttribute<SvgUnit>("x"); }
            set { this.Attributes["x"] = value; }
        }

        [SvgAttribute("y")]
        public virtual SvgUnit Y
        {
            get { return this.Attributes.GetAttribute<SvgUnit>("y"); }
            set { this.Attributes["y"] = value; }
        }

38
        /// <summary>
Eric Domke's avatar
Eric Domke committed
39
        /// Applies the required transforms to <see cref="ISvgRenderer"/>.
40
        /// </summary>
Eric Domke's avatar
Eric Domke committed
41
42
        /// <param name="renderer">The <see cref="ISvgRenderer"/> to be transformed.</param>
        protected internal override bool PushTransforms(ISvgRenderer renderer)
43
        {
44
            if (!base.PushTransforms(renderer)) return false;
Eric Domke's avatar
Eric Domke committed
45
            renderer.TranslateTransform(this.X.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this),
46
47
                                        this.Y.ToDeviceValue(renderer, UnitRenderingType.Vertical, this));
            return true;
48
49
        }

50
51
52
        /// <summary>
        /// Initializes a new instance of the <see cref="SvgUse"/> class.
        /// </summary>
davescriven's avatar
davescriven committed
53
54
        public SvgUse()
        {
55
56
            this.X = 0;
            this.Y = 0;
davescriven's avatar
davescriven committed
57
58
        }

Eric Domke's avatar
Eric Domke committed
59
        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
davescriven's avatar
davescriven committed
60
        {
61
62
            SvgVisualElement element = (SvgVisualElement)this.OwnerDocument.IdManager.GetElementById(this.ReferencedElement);
            return (element != null) ? element.Path(renderer) : null;
davescriven's avatar
davescriven committed
63
64
        }

Dan Backes's avatar
Dan Backes committed
65
        public override RectangleF CalculateBounds()
davescriven's avatar
davescriven committed
66
        {
Dan Backes's avatar
Dan Backes committed
67
            return new System.Drawing.RectangleF();
davescriven's avatar
davescriven committed
68
69
        }

Eric Domke's avatar
Eric Domke committed
70
71
        protected override bool Renderable { get { return false; } }

Eric Domke's avatar
Eric Domke committed
72
        protected override void Render(ISvgRenderer renderer)
davescriven's avatar
davescriven committed
73
        {
Eric Domke's avatar
Eric Domke committed
74
75
76
77
            if (this.Visible && this.Displayable && this.PushTransforms(renderer))
            {
                this.SetClip(renderer);

Eric Domke's avatar
Eric Domke committed
78
                var element = this.OwnerDocument.IdManager.GetElementById(this.ReferencedElement) as SvgVisualElement;
Eric Domke's avatar
Eric Domke committed
79
80
81
82
83
84
85
86
87
88
89
                if (element != null)
                {
                    var origParent = element.Parent;
                    element._parent = this;
                    element.RenderElement(renderer);
                    element._parent = origParent;
                }

                this.ResetClip(renderer);
                this.PopTransforms(renderer);
            }
davescriven's avatar
davescriven committed
90
        }
91
92


93
94
95
96
        public override SvgElement DeepCopy()
        {
            return DeepCopy<SvgUse>();
        }
97

98
99
100
101
102
103
        public override SvgElement DeepCopy<T>()
        {
            var newObj = base.DeepCopy<T>() as SvgUse;
            newObj.ReferencedElement = this.ReferencedElement;
            newObj.X = this.X;
            newObj.Y = this.Y;
104

105
106
            return newObj;
        }
107

davescriven's avatar
davescriven committed
108
109
    }
}