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                                 SetDirty ();
  81                         }
  82                 }
  83
  84                 internal void SetDirty () {
  85                         for (int n = 0; n < Count; n++)
  86                                 this [n].SetDirty ();
  87                         dirty = true;
  88                 }
  89
  90                 public void AddAt (int index, MenuItem child)
  91                 {
  92                         items.Insert (index, child);
  93                         child.Index = index;
  94                         child.Menu = menu;
  95                         child.SetParent (parent);
  96                         for (int n=index+1; n<items.Count; n++)
  97                                 ((MenuItem)items[n]).Index = n;
  98                         if (marked) {
  99                                 ((IStateManager)child).TrackViewState ();
 100                                 SetDirty ();
 101                         }
 102                 }
 103
 104                 public void Clear ()
 105                 {
 106                         if (menu != null || parent != null) {
 107                                 foreach (MenuItem nod in items) {
 108                                         nod.Menu = null;
 109                                         nod.SetParent (null);
 110                                 }
 111                         }
 112                         items.Clear ();
 113                         if (marked) {
 114                                 SetDirty ();
 115                         }
 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                         if (marked) {
 151                                 SetDirty ();
 152                         }
 153                 }
 154
 155                 public void RemoveAt (int index)
 156                 {
 157                         MenuItem item = (MenuItem) items [index];
 158                         items.RemoveAt (index);
 159                         if (menu != null)
 160                                 item.Menu = null;
 161                         if (marked) {
 162                                 SetDirty ();
 163                         }
 164                 }
 165
 166                 public int Count {
 167                         get { return items.Count; }
 168                 }
 169
 170                 public bool IsSynchronized {
 171                         get { return false; }
 172                 }
 173
 174                 public object SyncRoot {
 175                         get { return items; }
 176                 }
 177
 178                 void System.Collections.ICollection.CopyTo (Array array, int index)
 179                 {
 180                         items.CopyTo (array, index);
 181                 }
 182
 183                 void IStateManager.LoadViewState (object state)
 184                 {
 185                         if (state == null) return;
 186                         object[] its = (object[]) state;
 187
 188                         dirty = (bool)its [0];
 189
 190                         if (dirty) {
 191                                 items.Clear ();
 192
 193                                 for (int n = 1; n < its.Length; n++) {
 194                                         MenuItem item = new MenuItem ();
 195                                         Add (item);
 196                                         object ns = its [n];
 197                                         if (ns != null)
 198                                                 ((IStateManager) item).LoadViewState (ns);
 199                                 }
 200                         }
 201                         else {
 202                                 for (int n = 1; n < its.Length; n++) {
 203                                         Pair pair = (Pair) its [n];
 204                                         int oi = (int) pair.First;
 205                                         MenuItem node = (MenuItem) items [oi];
 206                                         ((IStateManager) node).LoadViewState (pair.Second);
 207                                 }
 208                         }
 209                 }
 210
 211                 object IStateManager.SaveViewState ()
 212                 {
 213                         object[] state = null;
 214                         bool hasData = false;
 215
 216                         if (dirty) {
 217                                 if (items.Count > 0) {
 218                                         hasData = true;
 219                                         state = new object [items.Count + 1];
 220                                         state [0] = true;
 221                                         for (int n = 0; n < items.Count; n++) {
 222                                                 MenuItem item = items [n] as MenuItem;
 223                                                 object ns = ((IStateManager) item).SaveViewState ();
 224                                                 state [n + 1] = ns;
 225                                         }
 226                                 }
 227                         } else {
 228                                 ArrayList list = new ArrayList ();
 229                                 for (int n=0; n<items.Count; n++) {
 230                                         MenuItem item = items[n] as MenuItem;
 231                                         object ns = ((IStateManager)item).SaveViewState ();
 232                                         if (ns != null) {
 233                                                 hasData = true;
 234                                                 list.Add (new Pair (n, ns));
 235                                         }
 236                                 }
 237                                 if (hasData) {
 238                                         list.Insert (0, false);
 239                                         state = list.ToArray ();
 240                                 }
 241                         }
 242
 243                         if (hasData)
 244                                 return state;
 245                         else
 246                                 return null;
 247                 }
 248
 249                 void IStateManager.TrackViewState ()
 250                 {
 251                         marked = true;
 252                         for (int n=0; n<items.Count; n++)
 253                                 ((IStateManager) items [n]).TrackViewState ();
 254                 }
 255
 256                 bool IStateManager.IsTrackingViewState {
 257                         get { return marked; }
 258                 }
 259         }
 260 }
 261
 262 #endif