106 lines
3.1 KiB
C#
106 lines
3.1 KiB
C#
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// Description: Html Agility Pack - HTML Parsers, selectors, traversors, manupulators.
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// Website & Documentation: http://html-agility-pack.net
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// Forum & Issues: https://github.com/zzzprojects/html-agility-pack
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// License: https://github.com/zzzprojects/html-agility-pack/blob/master/LICENSE
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// More projects: http://www.zzzprojects.com/
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// Copyright <20> ZZZ Projects Inc. 2014 - 2017. All rights reserved.
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using System;
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using System.Collections.Generic;
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namespace HtmlAgilityPack
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{
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internal class NameValuePairList
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{
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#region Fields
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internal readonly string Text;
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private List<KeyValuePair<string, string>> _allPairs;
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private Dictionary<string, List<KeyValuePair<string, string>>> _pairsWithName;
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#endregion
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#region Constructors
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internal NameValuePairList() :
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this(null)
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{
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}
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internal NameValuePairList(string text)
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{
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Text = text;
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_allPairs = new List<KeyValuePair<string, string>>();
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_pairsWithName = new Dictionary<string, List<KeyValuePair<string, string>>>();
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Parse(text);
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}
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#endregion
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#region Internal Methods
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internal static string GetNameValuePairsValue(string text, string name)
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{
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NameValuePairList l = new NameValuePairList(text);
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return l.GetNameValuePairValue(name);
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}
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internal List<KeyValuePair<string, string>> GetNameValuePairs(string name)
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{
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if (name == null)
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return _allPairs;
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return _pairsWithName.ContainsKey(name) ? _pairsWithName[name] : new List<KeyValuePair<string, string>>();
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}
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internal string GetNameValuePairValue(string name)
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{
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if (name == null)
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throw new ArgumentNullException();
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List<KeyValuePair<string, string>> al = GetNameValuePairs(name);
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if (al.Count == 0)
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return string.Empty;
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// return first item
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return al[0].Value.Trim();
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}
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#endregion
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#region Private Methods
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private void Parse(string text)
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{
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_allPairs.Clear();
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_pairsWithName.Clear();
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if (text == null)
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return;
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string[] p = text.Split(';');
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foreach (string pv in p)
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{
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if (pv.Length == 0)
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continue;
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string[] onep = pv.Split(new[] {'='}, 2);
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if (onep.Length == 0)
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continue;
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KeyValuePair<string, string> nvp = new KeyValuePair<string, string>(onep[0].Trim().ToLowerInvariant(),
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onep.Length < 2 ? "" : onep[1]);
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_allPairs.Add(nvp);
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// index by name
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List<KeyValuePair<string, string>> al;
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if (!_pairsWithName.TryGetValue(nvp.Key, out al))
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{
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al = new List<KeyValuePair<string, string>>();
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_pairsWithName.Add(nvp.Key, al);
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}
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al.Add(nvp);
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}
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}
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#endregion
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}
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}
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