85 lines
2.8 KiB
C#
85 lines
2.8 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace StyleSheetsParser
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{
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public class CssKeyframes : CssRule, ICssRulesContainer
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{
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public CssKeyframes(string name, IList<CssKeyframeSelector> selectors) : base(name) {
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_selectors = new List<CssKeyframeSelector>();
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if (selectors != null)
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{
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foreach (var s in selectors)
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{
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if (!s.IsValid|| (_percent.HasValue && s.IsPercent != _percent.Value)) { continue; }
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if (!_percent.HasValue) { _percent = s.IsPercent; }
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_selectors.Add(s);
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}
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}
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}
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bool? _percent;
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public bool IsPercent
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{
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get
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{
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return _percent.Value;
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}
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}
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IList<CssKeyframeSelector> _selectors;
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public IList<CssKeyframeSelector> Selectors { get { return _selectors; } }
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bool? _isValid;
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public override bool IsValid { get {
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if (!_isValid.HasValue)
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{
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//关键帧必须是符合下面的规则，否则视为为无效的
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_isValid = Regex.IsMatch(Name, @"^@[\-a-z]*keyframes\s+", RegexOptions.IgnoreCase);
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}
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return _isValid.Value; } set { _isValid = value; } }
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protected override string GetCssString() {
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if (Selectors == null || Selectors.Count == 0) return string.Empty;
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StringBuilder sb = new StringBuilder( Name + "{");
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foreach (var s in _selectors)
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{
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sb.Append(s);
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}
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sb.Append("}");
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return sb.ToString();
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}
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//public static CssKeyframes Parse(string source)
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//{
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// int i;
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// if (string.IsNullOrWhiteSpace(source)
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// || 1 > (i = (source = source.Trim()).IndexOf('{')) || i >= source.Length)
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// return null;
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// List<CssKeyframeSelector> selectors = new List<CssKeyframeSelector>();
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// string name = source.Substring(0, i);
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// string value = source.Substring(i).Trim();
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// value = value.Substring(1, value.Length - 1).Trim();
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// i = 0;
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// while (i < value.Length)
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// {
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// int l= value.IndexOf('}', i);
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// if (l <= 0) break;
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// string s = value.Substring(i,l);
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// selectors.Add(CssSelector.Parse(s, (n, attrs) => new CssKeyframeSelector(n, attrs)));
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// i++;
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// }
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// return new CssKeyframes(name, selectors);
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//}
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IEnumerable<CssRule> ICssRulesContainer.Selectors
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{
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get { return Selectors; }
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}
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}
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}
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