mcs/class/System.Web.Mvc2/System.Web.Mvc/ViewEngineCollection.cs

   1 /* ****************************************************************************\r
   2  *\r
   3  * Copyright (c) Microsoft Corporation. All rights reserved.\r
   4  *\r
   5  * This software is subject to the Microsoft Public License (Ms-PL). \r
   6  * A copy of the license can be found in the license.htm file included \r
   7  * in this distribution.\r
   8  *\r
   9  * You must not remove this notice, or any other, from this software.\r
  10  *\r
  11  * ***************************************************************************/\r
  12 \r
  13 namespace System.Web.Mvc {\r
  14     using System.Collections.Generic;\r
  15     using System.Collections.ObjectModel;\r
  16     using System.Web.Mvc.Resources;\r
  17 \r
  18     public class ViewEngineCollection : Collection<IViewEngine> {\r
  19 \r
  20         public ViewEngineCollection() {\r
  21         }\r
  22 \r
  23         public ViewEngineCollection(IList<IViewEngine> list)\r
  24             : base(list) {\r
  25         }\r
  26 \r
  27         protected override void InsertItem(int index, IViewEngine item) {\r
  28             if (item == null) {\r
  29                 throw new ArgumentNullException("item");\r
  30             }\r
  31             base.InsertItem(index, item);\r
  32         }\r
  33 \r
  34         protected override void SetItem(int index, IViewEngine item) {\r
  35             if (item == null) {\r
  36                 throw new ArgumentNullException("item");\r
  37             }\r
  38             base.SetItem(index, item);\r
  39         }\r
  40 \r
  41         private ViewEngineResult Find(Func<IViewEngine, ViewEngineResult> cacheLocator, Func<IViewEngine, ViewEngineResult> locator) {\r
  42             ViewEngineResult result;\r
  43 \r
  44             foreach (IViewEngine engine in Items) {\r
  45                 if (engine != null) {\r
  46                     result = cacheLocator(engine);\r
  47 \r
  48                     if (result.View != null) {\r
  49                         return result;\r
  50                     }\r
  51                 }\r
  52             }\r
  53 \r
  54             List<string> searched = new List<string>();\r
  55 \r
  56             foreach (IViewEngine engine in Items) {\r
  57                 if (engine != null) {\r
  58                     result = locator(engine);\r
  59 \r
  60                     if (result.View != null) {\r
  61                         return result;\r
  62                     }\r
  63 \r
  64                     searched.AddRange(result.SearchedLocations);\r
  65                 }\r
  66             }\r
  67 \r
  68             return new ViewEngineResult(searched);\r
  69         }\r
  70 \r
  71         public virtual ViewEngineResult FindPartialView(ControllerContext controllerContext, string partialViewName) {\r
  72             if (controllerContext == null) {\r
  73                 throw new ArgumentNullException("controllerContext");\r
  74             }\r
  75             if (string.IsNullOrEmpty(partialViewName)) {\r
  76                 throw new ArgumentException(MvcResources.Common_NullOrEmpty, "partialViewName");\r
  77             }\r
  78             Func<IViewEngine, ViewEngineResult> cacheLocator = e => e.FindPartialView(controllerContext, partialViewName, true);\r
  79             Func<IViewEngine, ViewEngineResult> locator = e => e.FindPartialView(controllerContext, partialViewName, false);\r
  80             return Find(cacheLocator, locator);\r
  81         }\r
  82 \r
  83         public virtual ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName) {\r
  84             if (controllerContext == null) {\r
  85                 throw new ArgumentNullException("controllerContext");\r
  86             }\r
  87             if (string.IsNullOrEmpty(viewName)) {\r
  88                 throw new ArgumentException(MvcResources.Common_NullOrEmpty, "viewName");\r
  89             }\r
  90             Func<IViewEngine, ViewEngineResult> cacheLocator = e => e.FindView(controllerContext, viewName, masterName, true);\r
  91             Func<IViewEngine, ViewEngineResult> locator = e => e.FindView(controllerContext, viewName, masterName, false);\r
  92             return Find(cacheLocator, locator);\r
  93         }\r
  94     }\r
  95 }\r