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                 MenuItem[] originalItems;
  42                 ArrayList items = new ArrayList ();
  43                 Menu menu;
  44                 MenuItem parent;
  45                 bool marked;
  46                 bool dirty;
  47
  48                 public MenuItemCollection ()
  49                 {
  50                 }
  51
  52                 public MenuItemCollection (MenuItem owner)
  53                 {
  54                         this.parent = owner;
  55                         this.menu = owner.Menu;
  56                 }
  57
  58                 internal MenuItemCollection (Menu menu)
  59                 {
  60                         this.menu = menu;
  61                 }
  62
  63                 internal void SetMenu (Menu menu)
  64                 {
  65                         this.menu = menu;
  66                         foreach (MenuItem item in items)
  67                                 item.Menu = menu;
  68                 }
  69
  70                 public MenuItem this [int i] {
  71                         get { return (MenuItem) items [i]; }
  72                 }
  73
  74                 public void Add (MenuItem child)
  75                 {
  76                         child.Index = items.Add (child);
  77                         child.Menu = menu;
  78                         child.SetParent (parent);
  79                         if (marked) {
  80                                 ((IStateManager)child).TrackViewState ();
  81                                 child.SetDirty ();
  82                                 dirty = true;
  83                         }
  84                 }
  85
  86                 public void AddAt (int index, MenuItem child)
  87                 {
  88                         items.Insert (index, child);
  89                         child.Index = index;
  90                         child.Menu = menu;
  91                         child.SetParent (parent);
  92                         for (int n=index+1; n<items.Count; n++)
  93                                 ((MenuItem)items[n]).Index = n;
  94                         if (marked) {
  95                                 ((IStateManager)child).TrackViewState ();
  96                                 child.SetDirty ();
  97                                 dirty = true;
  98                         }
  99                 }
 100
 101                 public void Clear ()
 102                 {
 103                         if (menu != null || parent != null) {
 104                                 foreach (MenuItem nod in items) {
 105                                         nod.Menu = null;
 106                                         nod.SetParent (null);
 107                                 }
 108                         }
 109                         items.Clear ();
 110                         dirty = true;
 111                 }
 112
 113                 public bool Contains (MenuItem child)
 114                 {
 115                         return items.Contains (child);
 116                 }
 117
 118                 public void CopyTo (Array itemArray, int index)
 119                 {
 120                         items.CopyTo (itemArray, index);
 121                 }
 122
 123                 public void CopyTo (MenuItem[] itemArray, int index)
 124                 {
 125                         items.CopyTo (itemArray, index);
 126                 }
 127
 128                 public IEnumerator GetEnumerator ()
 129                 {
 130                         return items.GetEnumerator ();
 131                 }
 132
 133                 public int IndexOf (MenuItem item)
 134                 {
 135                         return items.IndexOf (item);
 136                 }
 137
 138                 public void Remove (MenuItem item)
 139                 {
 140                         int i = IndexOf (item);
 141                         if (i == -1) return;
 142                         items.RemoveAt (i);
 143                         if (menu != null)
 144                                 item.Menu = null;
 145                         dirty = true;
 146                 }
 147
 148                 public void RemoveAt (int index)
 149                 {
 150                         MenuItem item = (MenuItem) items [index];
 151                         items.RemoveAt (index);
 152                         if (menu != null)
 153                                 item.Menu = null;
 154                         dirty = true;
 155                 }
 156
 157                 public int Count {
 158                         get { return items.Count; }
 159                 }
 160
 161                 public bool IsSynchronized {
 162                         get { return false; }
 163                 }
 164
 165                 public object SyncRoot {
 166                         get { return items; }
 167                 }
 168
 169                 void System.Collections.ICollection.CopyTo (Array array, int index)
 170                 {
 171                         items.CopyTo (array, index);
 172                 }
 173
 174                 void IStateManager.LoadViewState (object state)
 175                 {
 176                         if (state == null) return;
 177                         object[] its = (object[]) state;
 178
 179                         dirty = (bool)its [0];
 180
 181                         if (dirty)
 182                                 items.Clear ();
 183
 184                         for (int n=1; n<its.Length; n++) {
 185                                 Pair pair = (Pair) its [n];
 186                                 int oi = (int) pair.First;
 187                                 MenuItem item;
 188                                 if (oi != -1) item = originalItems [oi];
 189                                 else item = new MenuItem ();
 190                                 if (dirty) Add (item);
 191                                 ((IStateManager)item).LoadViewState (pair.Second);
 192                         }
 193                 }
 194
 195                 object IStateManager.SaveViewState ()
 196                 {
 197                         object[] state = null;
 198                         bool hasData = false;
 199
 200                         if (dirty) {
 201                                 state = new object [items.Count + 1];
 202                                 state [0] = true;
 203                                 for (int n=0; n<items.Count; n++) {
 204                                         MenuItem item = items[n] as MenuItem;
 205                                         int oi = Array.IndexOf (originalItems, item);
 206                                         object ns = ((IStateManager)item).SaveViewState ();
 207                                         if (ns != null) hasData = true;
 208                                         state [n + 1] = new Pair (oi, ns);
 209                                 }
 210                         } else {
 211                                 ArrayList list = new ArrayList ();
 212                                 for (int n=0; n<items.Count; n++) {
 213                                         MenuItem item = items[n] as MenuItem;
 214                                         object ns = ((IStateManager)item).SaveViewState ();
 215                                         if (ns != null) {
 216                                                 hasData = true;
 217                                                 list.Add (new Pair (n, ns));
 218                                         }
 219                                 }
 220                                 if (hasData) {
 221                                         list.Insert (0, false);
 222                                         state = list.ToArray ();
 223                                 }
 224                         }
 225
 226                         if (hasData)
 227                                 return state;
 228                         else
 229                                 return null;
 230                 }
 231
 232                 void IStateManager.TrackViewState ()
 233                 {
 234                         marked = true;
 235                         originalItems = new MenuItem [items.Count];
 236                         for (int n=0; n<items.Count; n++) {
 237                                 originalItems [n] = (MenuItem) items [n];
 238                                 ((IStateManager)originalItems [n]).TrackViewState ();
 239                         }
 240                 }
 241
 242                 bool IStateManager.IsTrackingViewState {
 243                         get { return marked; }
 244                 }
 245         }
 246 }
 247
 248 #endif