thememanager.cs

本系统是在asp版《在线文件管理器》的基础上设计制作

//------------------------------------------------------------------------------
// <copyright company="Telligent Systems">
//     Copyright (c) Telligent Systems Corporation.  All rights reserved.
// </copyright> 
//------------------------------------------------------------------------------

using System.Collections;
using System.Collections.Specialized;
using System.IO;
using System.Web;
using System.Web.Caching;
using CommunityServer.Components;
using CommunityServer.Configuration;
using CommunityServer.Galleries.Components;

namespace CommunityServer.Galleries.Controls
{
	/// <summary>
	/// Summary description for ThemeManager.
	/// </summary>
	public class ThemeManager
	{
		private NameValueCollection SkinList = new NameValueCollection();
		private Hashtable ThemeList = new Hashtable();
		private ThemeManager()
		{
			
		}

		public static ThemeManager Instance()
		{
			ThemeManager tm = CSCache.Get("ThemeManager") as ThemeManager;
			if(tm == null)
			{
				tm = new ThemeManager();
				CacheDependency dep = new CacheDependency(null, new string[]{CSConfiguration.CacheKey});
				CSCache.Insert("ThemeManager", tm, dep);
			}

			return tm;
		}

		public string SkinPath(string theme, string skin)
		{
			string key = theme + "|" + skin;

			string path = SkinList[key] as string;
			if(path == null)
			{

				path = WalkThemes(theme, skin);
				if(path != null)
				{
					if(GalleryConfiguration.Instance().EnableSkinCache)
						SkinList[key] = path;
				}
				else
					throw new CSException(CSExceptionType.SkinNotFound, string.Format("The Skin {0} could not be found",skin));
			}

			return path;
		}

		public static string SkinPath()
		{
			if(HttpContext.Current != null)
			{
				Gallery gallery = Galleries.GetGallery(CSContext.Current.ApplicationKey);
				string path = GalleryConfiguration.Instance().ThemeLocation + gallery.Theme + "/";
				if(path.EndsWith("/"))
					path = path.Substring(0, path.Length - 1);
				return path.Replace("~", Globals.ApplicationPath);
			}
			else
				return string.Empty;
		}

		protected string WalkThemes(string theme, string skin)
		{
			bool found = false;
			string path = null;
			while(!found)
			{
				ThemeConfig config = GetTheme(theme);

				if(config == null)
					break;

				if(FileExists(config.ThemeDirectoryPath, skin))
				{
					path = GalleryConfiguration.Instance().ThemeLocation + theme + "/"  + skin;
					found = true;
				}
				else
				{
					if(config.HasParent)
						theme = config.Parent;
					else
						found = true;
				}
			}

			return path;
		}

		public ThemeConfig GetTheme(string name)
		{
			ThemeConfig config = ThemeList[name] as ThemeConfig;
			if(config == null)
			{
				config = ThemeConfig.Create(name);
				ThemeList[name] = config;
			}

			return config;
		}

		bool FileExists(string dir, string file)
		{
			string path = Path.Combine(dir,file.Replace("/", @"\"));
			return File.Exists(path);
		}

        
	}
}