mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlTextArea.cs

   1 //
   2 // System.Web.UI.HtmlControls.HtmlTextArea.cs
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2005 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
  29 using System.ComponentModel;
  30 using System.Collections.Specialized;
  31 using System.Globalization;
  32 using System.Security.Permissions;
  33
  34 namespace System.Web.UI.HtmlControls {
  35
  36         // CAS
  37         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         // attributes
  40         [DefaultEvent ("ServerChange")]
  41         [ValidationProperty ("Value")]
  42 #if NET_2_0
  43         [SupportsEventValidation]
  44 #endif
  45         public class HtmlTextArea : HtmlContainerControl, IPostBackDataHandler
  46         {
  47                 static readonly object serverChangeEvent = new object ();
  48
  49                 public HtmlTextArea ()
  50                         : base ("textarea")
  51                 {
  52                 }
  53
  54
  55                 [DefaultValue ("")]
  56                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  57                 [WebSysDescription("")]
  58                 [WebCategory("Appearance")]
  59                 public int Cols {
  60                         get {
  61                                 string s = Attributes ["cols"];
  62                                 return (s == null) ? -1 : Convert.ToInt32 (s);
  63                         }
  64                         set {
  65                                 if (value == -1)
  66                                         Attributes.Remove ("cols");
  67                                 else
  68                                         Attributes ["cols"] = value.ToString (CultureInfo.InvariantCulture);
  69                         }
  70                 }
  71
  72                 [DefaultValue ("")]
  73                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  74                 [WebSysDescription("")]
  75                 [WebCategory("Behavior")]
  76                 public virtual string Name {
  77                         get { return UniqueID; }
  78                         set { ; }
  79                 }
  80
  81                 [DefaultValue ("")]
  82                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  83                 [WebSysDescription("")]
  84                 [WebCategory("Appearance")]
  85                 public int Rows {
  86                         get {
  87                                 string s = Attributes ["rows"];
  88                                 return (s == null) ? -1 : Convert.ToInt32 (s);
  89                         }
  90                         set {
  91                                 if (value == -1)
  92                                         Attributes.Remove ("rows");
  93                                 else
  94                                         Attributes ["rows"] = value.ToString (CultureInfo.InvariantCulture);
  95                         }
  96                 }
  97
  98                 [DefaultValue ("")]
  99                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 100                 [WebSysDescription("")]
 101                 [WebCategory("Appearance")]
 102                 public string Value {
 103                         get { return InnerText; }
 104                         set { InnerText = value; }
 105                 }
 106
 107
 108                 protected override void AddParsedSubObject (object obj)
 109                 {
 110                         if (!((obj is LiteralControl) || (obj is DataBoundLiteralControl))) {
 111                                 throw new HttpException (Locale.GetText ("Wrong type."));
 112                         }
 113                         base.AddParsedSubObject (obj);
 114                 }
 115
 116 #if NET_2_0
 117                 protected internal
 118 #else
 119                 protected
 120 #endif
 121                 override void OnPreRender (EventArgs e)
 122                 {
 123                         base.OnPreRender (e);
 124
 125                         if (Page != null && !Disabled) {
 126                                 Page.RegisterRequiresPostBack (this);
 127 #if NET_2_0
 128                                 Page.RegisterEnabledControl (this);
 129 #endif
 130                         }
 131                 }
 132
 133                 protected virtual void OnServerChange (EventArgs e)
 134                 {
 135                         EventHandler serverChange = (EventHandler) Events [serverChangeEvent];
 136                         if (serverChange != null)
 137                                 serverChange (this, e);
 138                 }
 139
 140                 protected override void RenderAttributes (HtmlTextWriter writer)
 141                 {
 142 #if NET_2_0
 143                         if (Page != null)
 144                                 Page.ClientScript.RegisterForEventValidation (UniqueID);
 145 #endif
 146                         if (Attributes ["name"] == null) {
 147                                 writer.WriteAttribute ("name", Name);
 148                         }
 149                         base.RenderAttributes (writer);
 150                 }
 151
 152 #if NET_2_0
 153                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 154                 {
 155                         return DefaultLoadPostData (postDataKey, postCollection);
 156                 }
 157
 158                 protected virtual void RaisePostDataChangedEvent ()
 159                 {
 160                         ValidateEvent (UniqueID, String.Empty);
 161                         OnServerChange (EventArgs.Empty);
 162                 }
 163 #endif
 164
 165                 internal bool DefaultLoadPostData (string postDataKey, NameValueCollection postCollection)
 166                 {
 167                         string s = postCollection [postDataKey];
 168                         if ((s != null) && (s != Value)) {
 169                                 Value = s;
 170                                 return true;
 171                         }
 172                         return false;
 173                 }
 174
 175                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 176                 {
 177 #if NET_2_0
 178                         return LoadPostData (postDataKey, postCollection);
 179 #else
 180                         return DefaultLoadPostData (postDataKey, postCollection);
 181 #endif
 182                 }
 183
 184                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 185                 {
 186 #if NET_2_0
 187                         RaisePostDataChangedEvent ();
 188 #else
 189                         OnServerChange (EventArgs.Empty);
 190 #endif
 191                 }
 192
 193
 194                 [WebSysDescription("")]
 195                 [WebCategory("Action")]
 196                 public event EventHandler ServerChange {
 197                         add { Events.AddHandler (serverChangeEvent, value); }
 198                         remove { Events.RemoveHandler (serverChangeEvent, value); }
 199                 }
 200         }
 201 }