[3437] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Linq;
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| 25 | using System.Text;
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| 26 | using HeuristicLab.PluginInfrastructure;
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| 27 | using System.Diagnostics;
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| 28 | using HeuristicLab.Common;
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| 29 |
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| 30 | namespace HeuristicLab.MainForm {
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| 31 | public static class MainFormManager {
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| 32 | private static object locker;
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| 33 | private static IMainForm mainform;
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| 34 | private static HashSet<Type> views;
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| 35 | private static Dictionary<Type, Type> defaultViews;
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| 36 |
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| 37 | static MainFormManager() {
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| 38 | locker = new object();
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| 39 | mainform = null;
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| 40 | views = new HashSet<Type>();
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| 41 | defaultViews = new Dictionary<Type, Type>();
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| 42 | }
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| 43 |
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| 44 | public static void RegisterMainForm(IMainForm mainForm) {
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| 45 | lock (locker) {
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| 46 | if (MainFormManager.mainform != null)
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| 47 | throw new ArgumentException("A mainform was already associated with the mainform manager.");
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| 48 | if (mainForm == null)
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| 49 | throw new ArgumentException("Could not associate null as a mainform in the mainform manager.");
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| 50 |
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| 51 | MainFormManager.mainform = mainForm;
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| 52 | IEnumerable<Type> types =
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| 53 | from t in ApplicationManager.Manager.GetTypes(typeof(IContentView))
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| 54 | where !t.IsAbstract && !t.IsInterface && ContentAttribute.HasContentAttribute(t)
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| 55 | select t;
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| 56 |
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| 57 | foreach (Type viewType in types) {
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| 58 | views.Add(viewType);
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| 59 | foreach (Type contentType in ContentAttribute.GetDefaultViewableTypes(viewType)) {
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| 60 | if (defaultViews.ContainsKey(contentType))
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| 61 | throw new ArgumentException("DefaultView for type " + contentType + " is " + defaultViews[contentType] +
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| 62 | ". Can't register additional DefaultView " + viewType + ".");
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| 63 | defaultViews[contentType] = viewType;
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| 64 | }
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| 65 | }
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| 66 | }
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| 67 | }
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| 68 |
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| 69 | public static IMainForm MainForm {
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| 70 | get { return mainform; }
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| 71 | }
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| 72 |
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| 73 | public static T GetMainForm<T>() where T : IMainForm {
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| 74 | return (T)mainform;
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| 75 | }
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| 76 |
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| 77 | public static IEnumerable<Type> GetViewTypes(Type contentType) {
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| 78 | CheckForContentType(contentType);
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| 79 | List<Type> viewTypes = (from v in views
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| 80 | where ContentAttribute.CanViewType(v, contentType)
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| 81 | select v).ToList();
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| 82 | //transform generic type definitions to generic types
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| 83 | for (int i = 0; i < viewTypes.Count; i++) {
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| 84 | viewTypes[i] = TransformGenericTypeDefinition(viewTypes[i], contentType);
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| 85 | }
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| 86 | return viewTypes.Where(t => t != null);
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| 87 | }
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| 88 |
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| 89 | public static IEnumerable<Type> GetViewTypes(Type contentType, bool returnOnlyMostSpecificViewTypes) {
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| 90 | CheckForContentType(contentType);
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| 91 | List<Type> viewTypes = new List<Type>(GetViewTypes(contentType));
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| 92 | if (returnOnlyMostSpecificViewTypes) {
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| 93 | Type defaultViewType = null;
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| 94 | try {
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| 95 | defaultViewType = GetDefaultViewType(contentType);
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| 96 | }
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| 97 | catch (InvalidOperationException) { }
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| 98 |
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| 99 | foreach (Type viewType in viewTypes.ToList()) {
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| 100 | if ((viewType != defaultViewType) && viewTypes.Any(t => t.IsSubclassOf(viewType)))
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| 101 | viewTypes.Remove(viewType);
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| 102 | }
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| 103 | }
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| 104 | return viewTypes;
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| 105 | }
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| 106 |
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| 107 | public static bool ViewCanViewObject(IContentView view, IContent content) {
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| 108 | return ContentAttribute.CanViewType(view.GetType(), content.GetType());
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| 109 | }
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| 110 |
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| 111 | public static Type GetDefaultViewType(Type contentType) {
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| 112 | CheckForContentType(contentType);
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| 113 | //check base classes for default view
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| 114 | Type type = contentType;
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| 115 | while (type != null) {
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| 116 | //check classes
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| 117 | foreach (Type defaultContentType in defaultViews.Keys) {
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| 118 | if (type == defaultContentType || type.CheckGenericTypes(defaultContentType))
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| 119 | return TransformGenericTypeDefinition(defaultViews[defaultContentType], contentType);
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| 120 | }
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| 121 |
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| 122 | //check interfaces
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| 123 | IEnumerable<Type> nonInheritedInterfaces = type.GetInterfaces().Where(i => !i.IsAssignableFrom(type.BaseType));
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| 124 | List<Type> defaultViewList = new List<Type>();
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| 125 | foreach (Type defaultContentType in defaultViews.Keys) {
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| 126 | if (nonInheritedInterfaces.Contains(defaultContentType) || nonInheritedInterfaces.Any(i => i.CheckGenericTypes(defaultContentType)))
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| 127 | defaultViewList.Add(defaultViews[defaultContentType]);
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| 128 | }
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| 129 |
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| 130 | //return only most spefic view as default view
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| 131 | foreach (Type viewType in defaultViewList.ToList()) {
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| 132 | if (defaultViewList.Any(t => t.IsSubclassOf(viewType)))
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| 133 | defaultViewList.Remove(viewType);
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| 134 | }
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| 135 |
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| 136 | if (defaultViewList.Count == 1)
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| 137 | return TransformGenericTypeDefinition(defaultViewList[0], contentType);
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| 138 | else if (defaultViewList.Count > 1)
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| 139 | throw new InvalidOperationException("Could not determine which is the default view for type " + contentType.ToString() + ". Because more than one implemented interfaces have a default view.");
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| 140 |
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| 141 | type = type.BaseType;
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| 142 | }
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| 143 |
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| 144 | return null;
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| 145 | }
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| 146 |
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| 147 | public static IContentView CreateDefaultView(object content) {
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| 148 | Type t = GetDefaultViewType(content.GetType());
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| 149 | if (t == null)
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| 150 | return null;
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| 151 |
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| 152 | return (IContentView)Activator.CreateInstance(t, content);
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| 153 | }
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| 154 | public static IContentView CreateView(Type viewType) {
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| 155 | if (!typeof(IView).IsAssignableFrom(viewType))
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| 156 | throw new ArgumentException("View can not be created becaues given type " + viewType.ToString() + " is not of type IView.");
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| 157 | if (viewType.IsGenericTypeDefinition)
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| 158 | throw new ArgumentException("View can not be created becaues given type " + viewType.ToString() + " is a generic type definition.");
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| 159 |
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| 160 | return (IContentView)Activator.CreateInstance(viewType);
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| 161 | }
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| 162 | public static IContentView CreateView(Type viewType, object content) {
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| 163 | CheckForContentType(content.GetType());
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| 164 | CheckForContentViewType(viewType);
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| 165 |
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| 166 | Type view = viewType;
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| 167 | if (view.IsGenericTypeDefinition)
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| 168 | view = TransformGenericTypeDefinition(view, content.GetType());
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| 169 |
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| 170 | return (IContentView)Activator.CreateInstance(view, content);
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| 171 | }
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| 172 |
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| 173 | private static void CheckForContentType(Type contentType) {
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| 174 | if (!typeof(IContent).IsAssignableFrom(contentType))
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| 175 | throw new ArgumentException("DefaultViews are only specified for types of IContent and not for " + contentType + ".");
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| 176 | }
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| 177 | private static void CheckForContentViewType(Type viewType) {
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| 178 | if (!typeof(IContentView).IsAssignableFrom(viewType))
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| 179 | throw new ArgumentException("View can not be created becaues given type " + viewType.ToString() + " is not of type IContentView.");
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| 180 | }
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| 181 |
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| 182 | private static Type TransformGenericTypeDefinition(Type viewType, Type contentType) {
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| 183 | if (contentType.IsGenericTypeDefinition)
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| 184 | throw new ArgumentException("The content type " + contentType.ToString() + " must not be a generic type definition.");
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| 185 |
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| 186 | if (!viewType.IsGenericTypeDefinition)
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| 187 | return viewType;
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| 188 |
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| 189 | Type contentTypeBaseType = null;
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| 190 | foreach (Type type in ContentAttribute.GetViewableTypes(viewType)) {
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| 191 | contentTypeBaseType = contentType;
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| 192 | while (contentTypeBaseType != null && (!contentTypeBaseType.IsGenericType ||
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| 193 | type.GetGenericTypeDefinition() != contentTypeBaseType.GetGenericTypeDefinition()))
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| 194 | contentTypeBaseType = contentTypeBaseType.BaseType;
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| 195 |
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| 196 | //check interfaces for generic type arguments
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| 197 | if (contentTypeBaseType == null) {
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| 198 | IEnumerable<Type> implementedInterfaces = contentType.GetInterfaces().Where(t => t.IsGenericType);
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| 199 | foreach (Type implementedInterface in implementedInterfaces) {
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| 200 | if (implementedInterface.CheckGenericTypes(type))
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| 201 | contentTypeBaseType = implementedInterface;
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| 202 | }
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| 203 | }
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| 204 | if (contentTypeBaseType != null) break;
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| 205 | }
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| 206 |
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| 207 | if (!contentTypeBaseType.IsGenericType)
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| 208 | throw new ArgumentException("Neither content type itself nor any of its base classes is a generic type. Could not determine generic type argument for the view.");
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| 209 |
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| 210 | Type[] viewTypeGenericArguments = viewType.GetGenericArguments();
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| 211 | Type[] contentTypeGenericArguments = contentTypeBaseType.GetGenericArguments();
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| 212 |
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| 213 | if (contentTypeGenericArguments.Length != viewTypeGenericArguments.Length)
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| 214 | throw new ArgumentException("Neiter the type (" + contentType.ToString() + ") nor any of its base types specifies " +
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| 215 | viewTypeGenericArguments.Length + " generic type arguments.");
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| 216 |
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| 217 | for (int i = 0; i < viewTypeGenericArguments.Length; i++) {
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| 218 | foreach (Type typeConstraint in viewTypeGenericArguments[i].GetGenericParameterConstraints()) {
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| 219 | if (!typeConstraint.IsAssignableFrom(contentTypeGenericArguments[i]))
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| 220 | return null;
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| 221 | }
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| 222 | }
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| 223 |
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| 224 | Type returnType = viewType.MakeGenericType(contentTypeGenericArguments);
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| 225 | return returnType;
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| 226 | }
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| 227 | }
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| 228 | }
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