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
  32 using System;
  33 using System.Web.UI;
  34 using System.Collections;
  35
  36 namespace System.Web.UI.WebControls
  37 {
  38         public sealed class MenuItemCollection: ICollection, IEnumerable, IStateManager
  39         {
  40                 ArrayList items = new ArrayList ();
  41                 Menu menu;
  42                 MenuItem parent;
  43                 bool marked;
  44                 bool dirty;
  45
  46                 public MenuItemCollection ()
  47                 {
  48                 }
  49
  50                 public MenuItemCollection (MenuItem owner)
  51                 {
  52                         this.parent = owner;
  53                         this.menu = owner.Menu;
  54                 }
  55
  56                 internal MenuItemCollection (Menu menu)
  57                 {
  58                         this.menu = menu;
  59                 }
  60
  61                 internal void SetMenu (Menu menu)
  62                 {
  63                         this.menu = menu;
  64                         foreach (MenuItem item in items)
  65                                 item.Menu = menu;
  66                 }
  67
  68                 public MenuItem this [int index] {
  69                         get { return (MenuItem) items [index]; }
  70                 }
  71
  72                 public void Add (MenuItem child)
  73                 {
  74                         child.Index = items.Add (child);
  75                         child.Menu = menu;
  76                         child.SetParent (parent);
  77                         if (marked) {
  78                                 ((IStateManager)child).TrackViewState ();
  79                                 SetDirty ();
  80                         }
  81                 }
  82
  83                 internal void SetDirty () {
  84                         for (int n = 0; n < Count; n++)
  85                                 this [n].SetDirty ();
  86                         dirty = true;
  87                 }
  88
  89                 public void AddAt (int index, MenuItem child)
  90                 {
  91                         items.Insert (index, child);
  92                         child.Index = index;
  93                         child.Menu = menu;
  94                         child.SetParent (parent);
  95                         for (int n=index+1; n<items.Count; n++)
  96                                 ((MenuItem)items[n]).Index = n;
  97                         if (marked) {
  98                                 ((IStateManager)child).TrackViewState ();
  99                                 SetDirty ();
 100                         }
 101                 }
 102
 103                 public void Clear ()
 104                 {
 105                         if (menu != null || parent != null) {
 106                                 foreach (MenuItem nod in items) {
 107                                         nod.Menu = null;
 108                                         nod.SetParent (null);
 109                                 }
 110                         }
 111                         items.Clear ();
 112                         if (marked) {
 113                                 SetDirty ();
 114                         }
 115                 }
 116
 117                 public bool Contains (MenuItem c)
 118                 {
 119                         return items.Contains (c);
 120                 }
 121
 122                 public void CopyTo (Array array, int index)
 123                 {
 124                         items.CopyTo (array, index);
 125                 }
 126
 127                 public void CopyTo (MenuItem[] array, int index)
 128                 {
 129                         items.CopyTo (array, index);
 130                 }
 131
 132                 public IEnumerator GetEnumerator ()
 133                 {
 134                         return items.GetEnumerator ();
 135                 }
 136
 137                 public int IndexOf (MenuItem value)
 138                 {
 139                         return items.IndexOf (value);
 140                 }
 141
 142                 public void Remove (MenuItem value)
 143                 {
 144                         int i = IndexOf (value);
 145                         if (i == -1) return;
 146                         items.RemoveAt (i);
 147                         if (menu != null)
 148                                 value.Menu = null;
 149                         if (marked) {
 150                                 SetDirty ();
 151                         }
 152                 }
 153
 154                 public void RemoveAt (int index)
 155                 {
 156                         MenuItem item = (MenuItem) items [index];
 157                         items.RemoveAt (index);
 158                         if (menu != null)
 159                                 item.Menu = null;
 160                         if (marked) {
 161                                 SetDirty ();
 162                         }
 163                 }
 164
 165                 public int Count {
 166                         get { return items.Count; }
 167                 }
 168
 169                 public bool IsSynchronized {
 170                         get { return false; }
 171                 }
 172
 173                 public object SyncRoot {
 174                         get { return items; }
 175                 }
 176
 177                 void System.Collections.ICollection.CopyTo (Array array, int index)
 178                 {
 179                         items.CopyTo (array, index);
 180                 }
 181
 182                 void IStateManager.LoadViewState (object state)
 183                 {
 184                         if (state == null) return;
 185                         object[] its = (object[]) state;
 186
 187                         dirty = (bool)its [0];
 188
 189                         if (dirty) {
 190                                 items.Clear ();
 191
 192                                 for (int n = 1; n < its.Length; n++) {
 193                                         MenuItem item = new MenuItem ();
 194                                         Add (item);
 195                                         object ns = its [n];
 196                                         if (ns != null)
 197                                                 ((IStateManager) item).LoadViewState (ns);
 198                                 }
 199                         }
 200                         else {
 201                                 for (int n = 1; n < its.Length; n++) {
 202                                         Pair pair = (Pair) its [n];
 203                                         int oi = (int) pair.First;
 204                                         MenuItem node = (MenuItem) items [oi];
 205                                         ((IStateManager) node).LoadViewState (pair.Second);
 206                                 }
 207                         }
 208                 }
 209
 210                 object IStateManager.SaveViewState ()
 211                 {
 212                         object[] state = null;
 213                         bool hasData = false;
 214
 215                         if (dirty) {
 216                                 if (items.Count > 0) {
 217                                         hasData = true;
 218                                         state = new object [items.Count + 1];
 219                                         state [0] = true;
 220                                         for (int n = 0; n < items.Count; n++) {
 221                                                 MenuItem item = items [n] as MenuItem;
 222                                                 object ns = ((IStateManager) item).SaveViewState ();
 223                                                 state [n + 1] = ns;
 224                                         }
 225                                 }
 226                         } else {
 227                                 ArrayList list = new ArrayList ();
 228                                 for (int n=0; n<items.Count; n++) {
 229                                         MenuItem item = items[n] as MenuItem;
 230                                         object ns = ((IStateManager)item).SaveViewState ();
 231                                         if (ns != null) {
 232                                                 hasData = true;
 233                                                 list.Add (new Pair (n, ns));
 234                                         }
 235                                 }
 236                                 if (hasData) {
 237                                         list.Insert (0, false);
 238                                         state = list.ToArray ();
 239                                 }
 240                         }
 241
 242                         if (hasData)
 243                                 return state;
 244                         else
 245                                 return null;
 246                 }
 247
 248                 void IStateManager.TrackViewState ()
 249                 {
 250                         marked = true;
 251                         for (int n=0; n<items.Count; n++)
 252                                 ((IStateManager) items [n]).TrackViewState ();
 253                 }
 254
 255                 bool IStateManager.IsTrackingViewState {
 256                         get { return marked; }
 257                 }
 258         }
 259 }
 260