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) 2005-2010 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 using System.Web.Util;
  34
  35 namespace System.Web.UI.HtmlControls
  36 {
  37         // CAS
  38         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  40         // attributes
  41         [DefaultEvent ("ServerChange")]
  42         [ValidationProperty ("Value")]
  43         [SupportsEventValidation]
  44         public class HtmlTextArea : HtmlContainerControl, IPostBackDataHandler
  45         {
  46                 static readonly object serverChangeEvent = new object ();
  47
  48                 public HtmlTextArea ()
  49                         : base ("textarea")
  50                 {
  51                 }
  52
  53                 [DefaultValue ("")]
  54                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  55                 [WebSysDescription("")]
  56                 [WebCategory("Appearance")]
  57                 public int Cols {
  58                         get {
  59                                 string s = Attributes ["cols"];
  60                                 return (s == null) ? -1 : Convert.ToInt32 (s);
  61                         }
  62                         set {
  63                                 if (value == -1)
  64                                         Attributes.Remove ("cols");
  65                                 else
  66                                         Attributes ["cols"] = value.ToString (Helpers.InvariantCulture);
  67                         }
  68                 }
  69
  70                 [DefaultValue ("")]
  71                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  72                 [WebSysDescription("")]
  73                 [WebCategory("Behavior")]
  74                 public virtual string Name {
  75                         get { return UniqueID; }
  76                         set { ; }
  77                 }
  78
  79                 [DefaultValue ("")]
  80                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  81                 [WebSysDescription("")]
  82                 [WebCategory("Appearance")]
  83                 public int Rows {
  84                         get {
  85                                 string s = Attributes ["rows"];
  86                                 return (s == null) ? -1 : Convert.ToInt32 (s);
  87                         }
  88                         set {
  89                                 if (value == -1)
  90                                         Attributes.Remove ("rows");
  91                                 else
  92                                         Attributes ["rows"] = value.ToString (Helpers.InvariantCulture);
  93                         }
  94                 }
  95
  96                 [DefaultValue ("")]
  97                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  98                 [WebSysDescription("")]
  99                 [WebCategory("Appearance")]
 100                 public string Value {
 101                         get { return InnerText; }
 102                         set { InnerText = value; }
 103                 }
 104
 105
 106                 protected override void AddParsedSubObject (object obj)
 107                 {
 108                         if (!((obj is LiteralControl) || (obj is DataBoundLiteralControl))) {
 109                                 throw new HttpException (Locale.GetText ("Wrong type."));
 110                         }
 111                         base.AddParsedSubObject (obj);
 112                 }
 113
 114                 protected internal override void OnPreRender (EventArgs e)
 115                 {
 116                         base.OnPreRender (e);
 117
 118                         Page page = Page;
 119                         if (page != null && !Disabled) {
 120                                 page.RegisterRequiresPostBack (this);
 121                                 page.RegisterEnabledControl (this);
 122                         }
 123                 }
 124
 125                 protected virtual void OnServerChange (EventArgs e)
 126                 {
 127                         EventHandler serverChange = (EventHandler) Events [serverChangeEvent];
 128                         if (serverChange != null)
 129                                 serverChange (this, e);
 130                 }
 131
 132                 protected override void RenderAttributes (HtmlTextWriter writer)
 133                 {
 134                         Page page = Page;
 135                         if (page != null)
 136                                 page.ClientScript.RegisterForEventValidation (UniqueID);
 137
 138                         if (Attributes ["name"] == null)
 139                                 writer.WriteAttribute ("name", Name);
 140                         base.RenderAttributes (writer);
 141                 }
 142
 143                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 144                 {
 145                         return DefaultLoadPostData (postDataKey, postCollection);
 146                 }
 147
 148                 protected virtual void RaisePostDataChangedEvent ()
 149                 {
 150                         ValidateEvent (UniqueID, String.Empty);
 151                         OnServerChange (EventArgs.Empty);
 152                 }
 153
 154                 internal bool DefaultLoadPostData (string postDataKey, NameValueCollection postCollection)
 155                 {
 156                         string s = postCollection [postDataKey];
 157                         if ((s != null) && (s != Value)) {
 158                                 Value = s;
 159                                 return true;
 160                         }
 161                         return false;
 162                 }
 163
 164                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 165                 {
 166                         return LoadPostData (postDataKey, postCollection);
 167                 }
 168
 169                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 170                 {
 171                         RaisePostDataChangedEvent ();
 172                 }
 173
 174                 [WebSysDescription("")]
 175                 [WebCategory("Action")]
 176                 public event EventHandler ServerChange {
 177                         add { Events.AddHandler (serverChangeEvent, value); }
 178                         remove { Events.RemoveHandler (serverChangeEvent, value); }
 179                 }
 180         }
 181 }