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58 lines
1.5 KiB
C#
58 lines
1.5 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Linq;
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using System.Windows.Media;
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namespace Wox.Infrastructure.Image
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{
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[Serializable]
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public class ImageCache
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{
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private const int MaxCached = 5000;
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public ConcurrentDictionary<string, int> Usage = new ConcurrentDictionary<string, int>();
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private readonly ConcurrentDictionary<string, ImageSource> _data = new ConcurrentDictionary<string, ImageSource>();
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public ImageSource this[string path]
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{
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get
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{
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Usage.AddOrUpdate(path, 1, (k, v) => v + 1);
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var i = _data[path];
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return i;
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}
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set { _data[path] = value; }
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}
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public void Cleanup()
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{
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var images = Usage
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.OrderByDescending(o => o.Value)
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.Take(MaxCached)
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.ToDictionary(i => i.Key, i => i.Value);
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Usage = new ConcurrentDictionary<string, int>(images);
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}
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public bool ContainsKey(string key)
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{
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var contains = _data.ContainsKey(key);
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return contains;
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}
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public int CacheSize()
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{
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return _data.Count;
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}
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/// <summary>
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/// return the number of unique images in the cache (by reference not by checking images content)
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/// </summary>
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public int UniqueImagesInCache()
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{
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return _data.Values.Distinct().Count();
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}
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}
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}
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