AutoPatientInfoRecorder/src/AntdUI/Lib/SVG/SvgElementIdManager.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.Text.RegularExpressions;

namespace AntdUI.Svg
{
    /// <summary>
    /// Provides methods to ensure element ID's are valid and unique.
    /// </summary>
    public class SvgElementIdManager
    {
        private SvgDocument _document;
        private Dictionary<string, SvgElement> _idValueMap;

        /// <summary>
        /// Retrieves the <see cref="SvgElement"/> with the specified ID.
        /// </summary>
        /// <param name="id">A <see cref="string"/> containing the ID of the element to find.</param>
        /// <returns>An <see cref="SvgElement"/> of one exists with the specified ID; otherwise false.</returns>
        public virtual SvgElement GetElementById(string id)
        {
            if (id.StartsWith("url("))
            {
                id = id.Substring(4);
                id = id.TrimEnd(')');
                if (id.StartsWith("\""))
                {
                    id = id.Substring(1);
                    id = id.TrimEnd('\"');
                }
            }
            if (id.StartsWith("#")) id = id.Substring(1);
            _idValueMap.TryGetValue(id, out var element);
            return element;
        }

        public virtual SvgElement GetElementById(Uri uri)
        {
            if (uri.ToString().StartsWith("url(")) uri = new Uri(uri.ToString().Substring(4).TrimEnd(')'), UriKind.Relative);
            if (!uri.IsAbsoluteUri && _document.BaseUri != null && !uri.ToString().StartsWith("#"))
            {
                var fullUri = new Uri(_document.BaseUri, uri);
                var hash = fullUri.OriginalString.Substring(fullUri.OriginalString.LastIndexOf('#'));
                SvgDocument doc;
                switch (fullUri.Scheme.ToLowerInvariant())
                {
                    case "file":
                        doc = SvgDocument.Open<SvgDocument>(fullUri.LocalPath.Substring(0, fullUri.LocalPath.Length - hash.Length));
                        return doc.IdManager.GetElementById(hash);
                    default: throw new NotSupportedException();
                }

            }
            return GetElementById(uri.ToString());
        }