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                 private static readonly object serverChangeEvent = new object ();
  48
  49
  50                 public HtmlTextArea ()
  51                         : base ("textarea")
  52                 {
  53                 }
  54
  55
  56                 [DefaultValue ("")]
  57                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  58                 [WebSysDescription("")]
  59                 [WebCategory("Appearance")]
  60                 public int Cols {
  61                         get {
  62                                 string s = Attributes ["cols"];
  63                                 return (s == null) ? -1 : Convert.ToInt32 (s);
  64                         }
  65                         set {
  66                                 if (value == -1)
  67                                         Attributes.Remove ("cols");
  68                                 else
  69                                         Attributes ["cols"] = value.ToString (CultureInfo.InvariantCulture);
  70                         }
  71                 }
  72
  73                 [DefaultValue ("")]
  74                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  75                 [WebSysDescription("")]
  76                 [WebCategory("Behavior")]
  77                 public virtual string Name {
  78                         get { return ID; }
  79                         set { ; }
  80                 }
  81
  82                 [DefaultValue ("")]
  83                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  84                 [WebSysDescription("")]
  85                 [WebCategory("Appearance")]
  86                 public int Rows {
  87                         get {
  88                                 string s = Attributes ["rows"];
  89                                 return (s == null) ? -1 : Convert.ToInt32 (s);
  90                         }
  91                         set {
  92                                 if (value == -1)
  93                                         Attributes.Remove ("rows");
  94                                 else
  95                                         Attributes ["rows"] = value.ToString (CultureInfo.InvariantCulture);
  96                         }
  97                 }
  98
  99                 [DefaultValue ("")]
 100                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 101                 [WebSysDescription("")]
 102                 [WebCategory("Appearance")]
 103                 public string Value {
 104                         get { return InnerHtml; }
 105                         set { InnerHtml = value; }
 106                 }
 107
 108
 109                 protected override void AddParsedSubObject (object obj)
 110                 {
 111                         if (!((obj is LiteralControl) || (obj is DataBoundLiteralControl))) {
 112                                 throw new HttpException (Locale.GetText ("Wrong type."));
 113                         }
 114                         base.AddParsedSubObject (obj);
 115                 }
 116
 117 #if NET_2_0
 118                 protected internal
 119 #else
 120                 protected
 121 #endif
 122                 override void OnPreRender (EventArgs e)
 123                 {
 124                         base.OnPreRender (e);
 125
 126                         if (Page != null) {
 127                                 Page.RegisterRequiresPostBack (this);
 128                         }
 129                 }
 130
 131                 protected virtual void OnServerChange (EventArgs e)
 132                 {
 133                         EventHandler serverChange = (EventHandler) Events [serverChangeEvent];
 134                         if (serverChange != null)
 135                                 serverChange (this, e);
 136                 }
 137
 138                 protected override void RenderAttributes (HtmlTextWriter writer)
 139                 {
 140                         if (Attributes ["name"] == null) {
 141                                 writer.WriteAttribute ("name", Name);
 142                         }
 143                         base.RenderAttributes (writer);
 144                 }
 145
 146 #if NET_2_0
 147                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 148                 {
 149                         return DefaultLoadPostData (postDataKey, postCollection);
 150                 }
 151
 152                 protected virtual void RaisePostDataChangedEvent ()
 153                 {
 154                         OnServerChange (EventArgs.Empty);
 155                 }
 156 #endif
 157
 158                 internal bool DefaultLoadPostData (string postDataKey, NameValueCollection postCollection)
 159                 {
 160                         string s = postCollection [postDataKey];
 161                         if ((s != null) && (s != Value)) {
 162                                 Value = s;
 163                                 return true;
 164                         }
 165                         return false;
 166                 }
 167
 168                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 169                 {
 170 #if NET_2_0
 171                         return LoadPostData (postDataKey, postCollection);
 172 #else
 173                         return DefaultLoadPostData (postDataKey, postCollection);
 174 #endif
 175                 }
 176
 177                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 178                 {
 179 #if NET_2_0
 180                         RaisePostDataChangedEvent ();
 181 #else
 182                         OnServerChange (EventArgs.Empty);
 183 #endif
 184                 }
 185
 186
 187                 [WebSysDescription("")]
 188                 [WebCategory("Action")]
 189                 public event EventHandler ServerChange {
 190                         add { Events.AddHandler (serverChangeEvent, value); }
 191                         remove { Events.RemoveHandler (serverChangeEvent, value); }
 192                 }
 193         }
 194 }