// THIS FILE IS PART OF SVG PROJECT
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// THE SVG PROJECT IS AN OPENSOURCE LIBRARY LICENSED UNDER THE MS-PL License.
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// COPYRIGHT (C) svg-net. ALL RIGHTS RESERVED.
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// GITHUB: https://github.com/svg-net/SVG
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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namespace AntdUI.Svg.Transforms
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{
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internal class SvgTransformConverter
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{
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static IEnumerable<string> SplitTransforms(string transforms)
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{
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int transformEnd = 0;
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for (int i = 0; i < transforms.Length; i++)
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{
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if (transforms[i] == ')')
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{
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yield return transforms.Substring(transformEnd, i - transformEnd + 1).Trim();
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while (i < transforms.Length && !char.IsLetter(transforms[i])) i++;
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transformEnd = i;
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}
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}
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}
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public static SvgTransformCollection Parse(string value)
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{
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SvgTransformCollection transformList = new SvgTransformCollection();
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foreach (string transform in SplitTransforms(value))
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{
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if (string.IsNullOrEmpty(transform)) continue;
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var parts = transform.Split('(', ')');
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string transformName = parts[0].Trim(), contents = parts[1].Trim();
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switch (transformName)
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{
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case "translate":
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var coords = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
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if (coords.Length == 0 || coords.Length > 2) throw new FormatException("Translate transforms must be in the format 'translate(x [,y])'");
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if (coords.Length > 1)
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{
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string c1 = coords[0].Trim(), c2 = coords[1].Trim();
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if (c1.EndsWith("%") || c2.EndsWith("%"))
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{
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if (c1.EndsWith("%") && c2.EndsWith("%"))
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{
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float x = float.Parse(c1.TrimEnd('%'), NumberStyles.Float, CultureInfo.InvariantCulture), y = float.Parse(c2.TrimEnd('%'), NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgTranslate(x, true, y, true));
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}
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else if (c1.EndsWith("%"))
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{
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float x = float.Parse(c1.TrimEnd('%'), NumberStyles.Float, CultureInfo.InvariantCulture), y = float.Parse(c2, NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgTranslate(x, true, y, false));
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}
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else
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{
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float x = float.Parse(c1, NumberStyles.Float, CultureInfo.InvariantCulture), y = float.Parse(c2.TrimEnd('%'), NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgTranslate(x, false, y, true));
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}
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}
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else
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{
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float x = float.Parse(c1, NumberStyles.Float, CultureInfo.InvariantCulture), y = float.Parse(c2.TrimEnd('%'), NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgTranslate(x, false, y, false));
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}
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}
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else
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{
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string c1 = coords[0].Trim();
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if (c1.EndsWith("%"))
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{
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float x = float.Parse(c1.TrimEnd('%'), NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgTranslate(x, true, 0F, false));
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}
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else
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{
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float x = float.Parse(c1, NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgTranslate(x, false, 0F, false));
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}
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}
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break;
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case "rotate":
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var args = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
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if (args.Length != 1 && args.Length != 3) throw new FormatException("Rotate transforms must be in the format 'rotate(angle [cx cy ])'");
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float angle = float.Parse(args[0], NumberStyles.Float, CultureInfo.InvariantCulture);
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if (args.Length == 1) transformList.Add(new SvgRotate(angle));
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else
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{
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float cx = float.Parse(args[1], NumberStyles.Float, CultureInfo.InvariantCulture);
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float cy = float.Parse(args[2], NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgRotate(angle, cx, cy));
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}
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break;
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case "scale":
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var scales = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
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if (scales.Length == 0 || scales.Length > 2) throw new FormatException("Scale transforms must be in the format 'scale(x [,y])'");
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float sx = float.Parse(scales[0].Trim(), NumberStyles.Float, CultureInfo.InvariantCulture);
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if (scales.Length > 1)
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{
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float sy = float.Parse(scales[1].Trim(), NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgScale(sx, sy));
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}
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else transformList.Add(new SvgScale(sx));
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break;
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case "matrix":
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var points = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
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if (points.Length != 6) throw new FormatException("Matrix transforms must be in the format 'matrix(m11, m12, m21, m22, dx, dy)'");
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List<float> mPoints = new List<float>();
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foreach (string point in points) mPoints.Add(float.Parse(point.Trim(), NumberStyles.Float, CultureInfo.InvariantCulture));
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transformList.Add(new SvgMatrix(mPoints));
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break;
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case "shear":
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var shears = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
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if (shears.Length == 0 || shears.Length > 2) throw new FormatException("Shear transforms must be in the format 'shear(x [,y])'");
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float hx = float.Parse(shears[0].Trim(), NumberStyles.Float, CultureInfo.InvariantCulture);
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if (shears.Length > 1)
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{
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float hy = float.Parse(shears[1].Trim(), NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgShear(hx, hy));
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}
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else transformList.Add(new SvgShear(hx));
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break;
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case "skewX":
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float ax = float.Parse(contents, NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgSkew(ax, 0));
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break;
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case "skewY":
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float ay = float.Parse(contents, NumberStyles.Float, CultureInfo.InvariantCulture);
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transformList.Add(new SvgSkew(0, ay));
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break;
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}
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}
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return transformList;
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}
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}
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}
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