mcs/class/System.Web.Mvc3/Mvc/BuildManagerViewEngine.cs

   1 namespace System.Web.Mvc {
   2     using System;
   3
   4     public abstract class BuildManagerViewEngine : VirtualPathProviderViewEngine {
   5         private IBuildManager _buildManager;
   6         private IViewPageActivator _viewPageActivator;
   7         private IResolver<IViewPageActivator> _activatorResolver;
   8
   9         protected BuildManagerViewEngine()
  10             : this(null, null, null) {
  11         }
  12
  13         protected BuildManagerViewEngine(IViewPageActivator viewPageActivator)
  14             : this(viewPageActivator, null, null) {
  15         }
  16
  17         internal BuildManagerViewEngine(IViewPageActivator viewPageActivator, IResolver<IViewPageActivator> activatorResolver, IDependencyResolver dependencyResolver) {
  18             if (viewPageActivator != null) {
  19                 _viewPageActivator = viewPageActivator;
  20             }
  21             else {
  22                 _activatorResolver = activatorResolver ?? new SingleServiceResolver<IViewPageActivator>(
  23                     () => null,
  24                     new DefaultViewPageActivator(dependencyResolver),
  25                     "BuildManagerViewEngine constructor"
  26                 );
  27             }
  28         }
  29
  30         internal IBuildManager BuildManager {
  31             get {
  32                 if (_buildManager == null)
  33                     _buildManager = new BuildManagerWrapper();
  34                 return _buildManager;
  35             }
  36             set {
  37                 _buildManager = value;
  38             }
  39         }
  40
  41         protected override bool FileExists(ControllerContext controllerContext, string virtualPath) {
  42             return BuildManager.FileExists(virtualPath);
  43         }
  44
  45         protected IViewPageActivator ViewPageActivator {
  46             get {
  47                 if (_viewPageActivator != null) {
  48                     return _viewPageActivator;
  49                 }
  50                 _viewPageActivator = _activatorResolver.Current;
  51                 return _viewPageActivator;
  52             }
  53         }
  54
  55         internal class DefaultViewPageActivator : IViewPageActivator {
  56             Func<IDependencyResolver> _resolverThunk;
  57
  58             public DefaultViewPageActivator()
  59                 : this(null) {
  60             }
  61
  62             public DefaultViewPageActivator(IDependencyResolver resolver) {
  63                 if (resolver == null) {
  64                     _resolverThunk = () => DependencyResolver.Current;
  65                 }
  66                 else {
  67                     _resolverThunk = () => resolver;
  68                 }
  69             }
  70
  71             public object Create(ControllerContext controllerContext, Type type) {
  72                 return _resolverThunk().GetService(type) ?? Activator.CreateInstance(type);
  73             }
  74         }
  75     }
  76 }