AutoPatientInfoRecorder/src/AntdUI/Lib/SVG/Transforms/SvgTransformConverter.cs

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// THIS FILE IS PART OF SVG PROJECT
// THE SVG PROJECT IS AN OPENSOURCE LIBRARY LICENSED UNDER THE MS-PL License.
// COPYRIGHT (C) svg-net. ALL RIGHTS RESERVED.
// GITHUB: https://github.com/svg-net/SVG

using System;
using System.Collections.Generic;
using System.Globalization;

namespace AntdUI.Svg.Transforms
{
    internal class SvgTransformConverter
    {
        static IEnumerable<string> SplitTransforms(string transforms)
        {
            int transformEnd = 0;

            for (int i = 0; i < transforms.Length; i++)
            {
                if (transforms[i] == ')')
                {
                    yield return transforms.Substring(transformEnd, i - transformEnd + 1).Trim();
                    while (i < transforms.Length && !char.IsLetter(transforms[i])) i++;
                    transformEnd = i;
                }
            }
        }

        public static SvgTransformCollection Parse(string value)
        {
            SvgTransformCollection transformList = new SvgTransformCollection();
            foreach (string transform in SplitTransforms(value))
            {
                if (string.IsNullOrEmpty(transform)) continue;
                var parts = transform.Split('(', ')');
                string transformName = parts[0].Trim(), contents = parts[1].Trim();
                switch (transformName)
                {
                    case "translate":
                        var coords = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
                        if (coords.Length == 0 || coords.Length > 2) throw new FormatException("Translate transforms must be in the format 'translate(x [,y])'");
                        float x = float.Parse(coords[0].Trim(), NumberStyles.Float, CultureInfo.InvariantCulture);
                        if (coords.Length > 1)
                        {
                            float y = float.Parse(coords[1].Trim(), NumberStyles.Float, CultureInfo.InvariantCulture);
                            transformList.Add(new SvgTranslate(x, y));
                        }
                        else transformList.Add(new SvgTranslate(x));
                        break;
                    case "rotate":
                        var args = contents.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
                        if (args.Length != 1 && args.Length != 3) throw new FormatException("Rotate transforms must be in the format 'rotate(angle [cx cy ])'");
                        float angle = float.Parse(args[0], NumberStyles.Float, CultureInfo.InvariantCulture);
                        if (args.Length == 1) transformList.Add(new SvgRotate(angle));
                        else
                        {
                            float cx = float.Parse(args[1], NumberStyles.Float, CultureInfo.InvariantCulture);
                            float cy = float.Parse(args[2], NumberStyles.Float, CultureInfo.InvariantCulture);
                            transformList.Add(new SvgRotate(angle, cx, cy));
                        }