class/System/System.ComponentModel/EventDescriptorCollection.cs

   1 //
   2 // System.ComponentModel.EventDescriptorCollection.cs
   3 //
   4 // Authors:
   5 //   Rodrigo Moya (rodrigo@ximian.com)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Ximian, Inc.
   9 // (C) 2003 Andreas Nahr
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System.Collections;
  34 using System.Globalization;
  35 using System.Runtime.InteropServices;
  36
  37 namespace System.ComponentModel
  38 {
  39         [ComVisible (true)]
  40         public class EventDescriptorCollection : IList, ICollection, IEnumerable
  41         {
  42                 private ArrayList eventList = new ArrayList ();
  43                 private bool isReadOnly;
  44                 public static readonly EventDescriptorCollection Empty = new EventDescriptorCollection (null, true);
  45
  46                 private EventDescriptorCollection ()
  47                 {
  48                 }
  49
  50                 internal EventDescriptorCollection (ArrayList list)
  51                 {
  52                         eventList = list;
  53                 }
  54
  55                 public EventDescriptorCollection (EventDescriptor[] events)
  56                         : this (events, false)
  57                 {
  58                 }
  59
  60 #if NET_2_0
  61                 public
  62 #endif
  63                 EventDescriptorCollection (EventDescriptor[] events, bool readOnly)
  64                 {
  65                         this.isReadOnly = readOnly;
  66                         if (events == null)
  67                                 return;
  68
  69                         for (int i = 0; i < events.Length; i++)
  70                                 this.Add (events[i]);
  71                 }
  72
  73                 public int Add (EventDescriptor value)
  74                 {
  75                         if (isReadOnly)
  76                                 throw new NotSupportedException ("The collection is read-only");
  77                         return eventList.Add (value);
  78                 }
  79
  80                 void IList.Clear ()
  81                 {
  82                         Clear ();
  83                 }
  84
  85                 public void Clear ()
  86                 {
  87                         if (isReadOnly)
  88                                 throw new NotSupportedException ("The collection is read-only");
  89                         eventList.Clear ();
  90                 }
  91
  92                 public bool Contains (EventDescriptor value) {
  93                         return eventList.Contains (value);
  94                 }
  95
  96                 public virtual EventDescriptor Find (string name, bool ignoreCase)
  97                 {
  98                         foreach (EventDescriptor e in eventList) {
  99 #if NET_2_0
 100                                 if (ignoreCase) {
 101                                         if (0 == String.Compare (name, e.Name, StringComparison.OrdinalIgnoreCase))
 102                                                 return e;
 103                                 } else {
 104                                         if (0 == String.Compare (name, e.Name, StringComparison.Ordinal))
 105                                                 return e;
 106                                 }
 107 #else
 108                                 if (0 == String.Compare (name, e.Name, ignoreCase, CultureInfo.InvariantCulture))
 109                                         return e;
 110 #endif
 111                         }
 112                         return null;
 113                 }
 114
 115                 IEnumerator IEnumerable.GetEnumerator () {
 116                         return GetEnumerator ();
 117                 }
 118
 119                 public IEnumerator GetEnumerator () {
 120                         return eventList.GetEnumerator ();
 121                 }
 122
 123                 public int IndexOf (EventDescriptor value) {
 124                         return eventList.IndexOf (value);
 125                 }
 126
 127                 public void Insert (int index, EventDescriptor value)
 128                 {
 129                         if (isReadOnly)
 130                                 throw new NotSupportedException ("The collection is read-only");
 131                         eventList.Insert (index, value);
 132                 }
 133
 134                 public void Remove (EventDescriptor value)
 135                 {
 136                         if (isReadOnly)
 137                                 throw new NotSupportedException ("The collection is read-only");
 138                         eventList.Remove (value);
 139                 }
 140
 141                 void IList.RemoveAt (int index)
 142                 {
 143                         RemoveAt (index);
 144                 }
 145
 146                 public void RemoveAt (int index)
 147                 {
 148                         if (isReadOnly)
 149                                 throw new NotSupportedException ("The collection is read-only");
 150                         eventList.RemoveAt (index);
 151                 }
 152
 153                 public virtual EventDescriptorCollection Sort () {
 154                         EventDescriptorCollection col = CloneCollection ();
 155                         col.InternalSort ((IComparer) null);
 156                         return col;
 157                 }
 158
 159                 public virtual EventDescriptorCollection Sort (IComparer comparer) {
 160                         EventDescriptorCollection col = CloneCollection ();
 161                         col.InternalSort (comparer);
 162                         return col;
 163                 }
 164
 165                 public virtual EventDescriptorCollection Sort (string[] order) {
 166                         EventDescriptorCollection col = CloneCollection ();
 167                         col.InternalSort (order);
 168                         return col;
 169                 }
 170
 171                 public virtual EventDescriptorCollection Sort (string[] order, IComparer comparer) {
 172                         EventDescriptorCollection col = CloneCollection ();
 173                         if (order != null) {
 174                                 ArrayList sorted = col.ExtractItems (order);
 175                                 col.InternalSort (comparer);
 176                                 sorted.AddRange (col.eventList);
 177                                 col.eventList = sorted;
 178                         } else {
 179                                 col.InternalSort (comparer);
 180                         }
 181                         return col;
 182                 }
 183
 184                 protected void InternalSort (IComparer comparer) {
 185                         if (comparer == null)
 186                                 comparer = MemberDescriptor.DefaultComparer;
 187                         eventList.Sort (comparer);
 188                 }
 189
 190                 protected void InternalSort (string[] order) {
 191                         if (order != null) {
 192                                 ArrayList sorted = ExtractItems (order);
 193                                 InternalSort ((IComparer) null);
 194                                 sorted.AddRange (eventList);
 195                                 eventList = sorted;
 196                         } else {
 197                                 InternalSort ((IComparer) null);
 198                         }
 199                 }
 200
 201                 ArrayList ExtractItems (string[] names)
 202                 {
 203                         ArrayList sorted = new ArrayList (eventList.Count);
 204                         object[] ext = new object [names.Length];
 205
 206                         for (int n=0; n<eventList.Count; n++)
 207                         {
 208                                 EventDescriptor ed = (EventDescriptor) eventList[n];
 209                                 int i = Array.IndexOf (names, ed.Name);
 210                                 if (i != -1) {
 211                                         ext[i] = ed;
 212                                         eventList.RemoveAt (n);
 213                                         n--;
 214                                 }
 215                         }
 216                         foreach (object ob in ext)
 217                                 if (ob != null) sorted.Add (ob);
 218
 219                         return sorted;
 220                 }
 221
 222                 private EventDescriptorCollection CloneCollection ()
 223                 {
 224                         EventDescriptorCollection col = new EventDescriptorCollection ();
 225                         col.eventList = (ArrayList) eventList.Clone ();
 226                         return col;
 227                 }
 228
 229                 internal EventDescriptorCollection Filter (Attribute[] attributes)
 230                 {
 231                         EventDescriptorCollection col = new EventDescriptorCollection ();
 232                         foreach (EventDescriptor ed in eventList)
 233                                 if (ed.Attributes.Contains (attributes))
 234                                         col.eventList.Add (ed);
 235                         return col;
 236                 }
 237
 238                 int ICollection.Count {
 239                         get { return Count; }
 240                 }
 241
 242                 public int Count {
 243                         get {
 244                                 return eventList.Count;
 245                         }
 246                 }
 247
 248                  public virtual EventDescriptor this[string name] {
 249                          get { return Find (name, false); }
 250                  }
 251
 252                 public virtual EventDescriptor this[int index] {
 253                         get {
 254                                 return (EventDescriptor) eventList[index];
 255                         }
 256                 }
 257
 258                 // IList methods
 259
 260                 int IList.Add (object value) {
 261                         return Add ((EventDescriptor) value);
 262                 }
 263
 264                 bool IList.Contains (object value) {
 265                         return Contains ((EventDescriptor) value);
 266                 }
 267
 268                 int IList.IndexOf (object value) {
 269                         return IndexOf ((EventDescriptor) value);
 270                 }
 271
 272                 void IList.Insert (int index, object value) {
 273                         Insert (index, (EventDescriptor) value);
 274                 }
 275
 276                 void IList.Remove (object value) {
 277                         Remove ((EventDescriptor) value);
 278                 }
 279
 280                 bool IList.IsFixedSize {
 281                         get {
 282 #if NET_2_0
 283                                 return isReadOnly;
 284 #else
 285                                 return !isReadOnly;
 286 #endif
 287                         }
 288                 }
 289
 290                 bool IList.IsReadOnly {
 291                         get { return isReadOnly; }
 292                 }
 293
 294                 object IList.this[int index] {
 295                         get {
 296                                 return eventList[index];
 297                         }
 298                         set {
 299                                 if (isReadOnly)
 300                                         throw new NotSupportedException ("The collection is read-only");
 301                                 eventList[index] = value;
 302                         }
 303                 }
 304
 305                 // ICollection methods
 306
 307                 void ICollection.CopyTo (Array array, int index) {
 308                         eventList.CopyTo (array, index);
 309                 }
 310
 311                 bool ICollection.IsSynchronized {
 312                         get { return false; }
 313                 }
 314
 315                 object ICollection.SyncRoot {
 316                         get { return null; }
 317                 }
 318         }
 319 }