mcs/class/System.Web/System.Web.UI.WebControls/MenuItemCollection.cs

   1 //
   2 // System.Web.UI.WebControls.MenuItemCollection.cs
   3 //
   4 // Authors:
   5 //      Lluis Sanchez Gual (lluis@novell.com)
   6 //
   7 // (C) 2004 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  29 //
  30
  31 #if NET_2_0
  32
  33 using System;
  34 using System.Web.UI;
  35 using System.Collections;
  36
  37 namespace System.Web.UI.WebControls
  38 {
  39         public sealed class MenuItemCollection: ICollection, IEnumerable, IStateManager
  40         {
  41                 ArrayList items = new ArrayList ();
  42                 Menu menu;
  43                 MenuItem parent;
  44                 bool marked;
  45                 bool dirty;
  46
  47                 public MenuItemCollection ()
  48                 {
  49                 }
  50
  51                 public MenuItemCollection (MenuItem owner)
  52                 {
  53                         this.parent = owner;
  54                         this.menu = owner.Menu;
  55                 }
  56
  57                 internal MenuItemCollection (Menu menu)
  58                 {
  59                         this.menu = menu;
  60                 }
  61
  62                 internal void SetMenu (Menu menu)
  63                 {
  64                         this.menu = menu;
  65                         foreach (MenuItem item in items)
  66                                 item.Menu = menu;
  67                 }
  68
  69                 public MenuItem this [int i] {
  70                         get { return (MenuItem) items [i]; }
  71                 }
  72
  73                 public void Add (MenuItem child)
  74                 {
  75                         child.Index = items.Add (child);
  76                         child.Menu = menu;
  77                         child.SetParent (parent);
  78                         if (marked) {
  79                                 ((IStateManager)child).TrackViewState ();
  80                                 child.SetDirty ();
  81                                 dirty = true;
  82                         }
  83                 }
  84
  85                 internal void SetDirty () {
  86                         for (int n = 0; n < Count; n++)
  87                                 this [n].SetDirty ();
  88                         dirty = true;
  89                 }
  90
  91                 public void AddAt (int index, MenuItem child)
  92                 {
  93                         items.Insert (index, child);
  94                         child.Index = index;
  95                         child.Menu = menu;
  96                         child.SetParent (parent);
  97                         for (int n=index+1; n<items.Count; n++)
  98                                 ((MenuItem)items[n]).Index = n;
  99                         if (marked) {
 100                                 ((IStateManager)child).TrackViewState ();
 101                                 child.SetDirty ();
 102                                 dirty = true;
 103                         }
 104                 }
 105
 106                 public void Clear ()
 107                 {
 108                         if (menu != null || parent != null) {
 109                                 foreach (MenuItem nod in items) {
 110                                         nod.Menu = null;
 111                                         nod.SetParent (null);
 112                                 }
 113                         }
 114                         items.Clear ();
 115                         dirty = true;
 116                 }
 117
 118                 public bool Contains (MenuItem child)
 119                 {
 120                         return items.Contains (child);
 121                 }
 122
 123                 public void CopyTo (Array itemArray, int index)
 124                 {
 125                         items.CopyTo (itemArray, index);
 126                 }
 127
 128                 public void CopyTo (MenuItem[] itemArray, int index)
 129                 {
 130                         items.CopyTo (itemArray, index);
 131                 }
 132
 133                 public IEnumerator GetEnumerator ()
 134                 {
 135                         return items.GetEnumerator ();
 136                 }
 137
 138                 public int IndexOf (MenuItem item)
 139                 {
 140                         return items.IndexOf (item);
 141                 }
 142
 143                 public void Remove (MenuItem item)
 144                 {
 145                         int i = IndexOf (item);
 146                         if (i == -1) return;
 147                         items.RemoveAt (i);
 148                         if (menu != null)
 149                                 item.Menu = null;
 150                         dirty = true;
 151                 }
 152
 153                 public void RemoveAt (int index)
 154                 {
 155                         MenuItem item = (MenuItem) items [index];
 156                         items.RemoveAt (index);
 157                         if (menu != null)
 158                                 item.Menu = null;
 159                         dirty = true;
 160                 }
 161
 162                 public int Count {
 163                         get { return items.Count; }
 164                 }
 165
 166                 public bool IsSynchronized {
 167                         get { return false; }
 168                 }
 169
 170                 public object SyncRoot {
 171                         get { return items; }
 172                 }
 173
 174                 void System.Collections.ICollection.CopyTo (Array array, int index)
 175                 {
 176                         items.CopyTo (array, index);
 177                 }
 178
 179                 void IStateManager.LoadViewState (object state)
 180                 {
 181                         if (state == null) return;
 182                         object[] its = (object[]) state;
 183
 184                         dirty = (bool)its [0];
 185
 186                         if (dirty) {
 187                                 items.Clear ();
 188
 189                                 for (int n = 1; n < its.Length; n++) {
 190                                         MenuItem item = new MenuItem ();
 191                                         Add (item);
 192                                         object ns = its [n];
 193                                         if (ns != null)
 194                                                 ((IStateManager) item).LoadViewState (ns);
 195                                 }
 196                         }
 197                 }
 198
 199                 object IStateManager.SaveViewState ()
 200                 {
 201                         object[] state = null;
 202                         bool hasData = false;
 203
 204                         if (dirty) {
 205                                 state = new object [items.Count + 1];
 206                                 state [0] = true;
 207                                 for (int n=0; n<items.Count; n++) {
 208                                         MenuItem item = items[n] as MenuItem;
 209                                         object ns = ((IStateManager)item).SaveViewState ();
 210                                         if (ns != null) {
 211                                                 hasData = true;
 212                                                 state [n + 1] = ns;
 213                                         }
 214                                 }
 215                         } else {
 216                                 ArrayList list = new ArrayList ();
 217                                 for (int n=0; n<items.Count; n++) {
 218                                         MenuItem item = items[n] as MenuItem;
 219                                         object ns = ((IStateManager)item).SaveViewState ();
 220                                         if (ns != null) {
 221                                                 hasData = true;
 222                                                 list.Add (new Pair (n, ns));
 223                                         }
 224                                 }
 225                                 if (hasData) {
 226                                         list.Insert (0, false);
 227                                         state = list.ToArray ();
 228                                 }
 229                         }
 230
 231                         if (hasData)
 232                                 return state;
 233                         else
 234                                 return null;
 235                 }
 236
 237                 void IStateManager.TrackViewState ()
 238                 {
 239                         marked = true;
 240                         for (int n=0; n<items.Count; n++)
 241                                 ((IStateManager) items [n]).TrackViewState ();
 242                 }
 243
 244                 bool IStateManager.IsTrackingViewState {
 245                         get { return marked; }
 246                 }
 247         }
 248 }
 249
 250 #endif