mcs/class/System.Web/System.Web.UI.WebControls/TableCell.cs

   1 //
   2 // System.Web.UI.WebControls.TableCell.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.Globalization;
  31 using System.Security.Permissions;
  32 using System.Text;
  33 using System.Web.Util;
  34
  35 namespace System.Web.UI.WebControls {
  36
  37         // CAS
  38         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  40         // attributes
  41         [ControlBuilder (typeof (TableCellControlBuilder))]
  42         [DefaultProperty ("Text")]
  43         [ParseChildren (false)]
  44         [ToolboxItem ("")]
  45         [Bindable (false)]
  46         [Designer ("System.Web.UI.Design.WebControls.PreviewControlDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  47         public class TableCell : WebControl {
  48
  49                 public TableCell ()
  50                         : base (HtmlTextWriterTag.Td)
  51                 {
  52                         AutoID = false;
  53                 }
  54
  55                 // FIXME: is there a clean way to change the tag's name without using a ctor ?
  56                 // if not then this truly limits the usefulness of inheritance
  57                 internal TableCell (HtmlTextWriterTag tag)
  58                         : base (tag)
  59                 {
  60                         AutoID = false;
  61                 }
  62
  63
  64                 [DefaultValue (null)]
  65                 [TypeConverter (typeof (StringArrayConverter))]
  66                 public virtual string[] AssociatedHeaderCellID {
  67                         get {
  68                                 object o = ViewState ["AssociatedHeaderCellID"];
  69                                 return (o == null) ? new string[0] : (string[]) o;
  70                         }
  71                         set {
  72                                 if (value == null)
  73                                         ViewState.Remove ("AssociatedHeaderCellID");
  74                                 else
  75                                         ViewState ["AssociatedHeaderCellID"] = value;
  76                         }
  77                 }
  78
  79                 [DefaultValue (0)]
  80                 [WebSysDescription ("")]
  81                 [WebCategory ("Appearance")]
  82                 public virtual int ColumnSpan {
  83                         get {
  84                                 object o = ViewState ["ColumnSpan"];
  85                                 return (o == null) ? 0 : (int) o;
  86                         }
  87                         set {
  88                                 // LAMESPEC: undocumented (but like Table.CellPadding)
  89                                 if (value < 0)
  90                                         throw new ArgumentOutOfRangeException ("< 0");
  91                                 ViewState ["ColumnSpan"] = value;
  92                         }
  93                 }
  94
  95                 [DefaultValue (HorizontalAlign.NotSet)]
  96                 [WebSysDescription ("")]
  97                 [WebCategory ("Layout")]
  98                 public virtual HorizontalAlign HorizontalAlign {
  99                         get {
 100                                 if (!ControlStyleCreated)
 101                                         return HorizontalAlign.NotSet; // default value
 102                                 return TableItemStyle.HorizontalAlign;
 103                         }
 104                         set { TableItemStyle.HorizontalAlign = value; }
 105                 }
 106
 107                 [DefaultValue (0)]
 108                 [WebSysDescription ("")]
 109                 [WebCategory ("Layout")]
 110                 public virtual int RowSpan {
 111                         get {
 112                                 object o = ViewState ["RowSpan"];
 113                                 return (o == null) ? 0 : (int) o;
 114                         }
 115                         set {
 116                                 // LAMESPEC: undocumented (but like Table.CellPadding)
 117                                 if (value < 0)
 118                                         throw new ArgumentOutOfRangeException ("< 0");
 119                                 ViewState ["RowSpan"] = value;
 120                         }
 121                 }
 122
 123                 [Localizable (true)]
 124                 [PersistenceMode (PersistenceMode.InnerDefaultProperty)]
 125                 [DefaultValue ("")]
 126                 [WebSysDescription ("")]
 127                 [WebCategory ("Appearance")]
 128                 public virtual string Text {
 129                         get {
 130                                 object o = ViewState ["Text"];
 131                                 return (o == null) ? String.Empty : (string) o;
 132                         }
 133                         set {
 134                                 if (value == null)
 135                                         ViewState.Remove ("Text");
 136                                 else {
 137                                         ViewState ["Text"] = value;
 138                                         if (HasControls ())
 139                                                 Controls.Clear ();
 140                                 }
 141                         }
 142                 }
 143
 144                 [DefaultValue (VerticalAlign.NotSet)]
 145                 [WebSysDescription ("")]
 146                 [WebCategory ("Layout")]
 147                 public virtual VerticalAlign VerticalAlign {
 148                         get {
 149                                 if (!ControlStyleCreated)
 150                                         return VerticalAlign.NotSet; // default value
 151                                 return TableItemStyle.VerticalAlign;
 152                         }
 153                         set { TableItemStyle.VerticalAlign = value; }
 154                 }
 155
 156                 [DefaultValue (true)]
 157                 [WebSysDescription ("")]
 158                 [WebCategory ("Layout")]
 159                 public virtual bool Wrap {
 160                         get {
 161                                 if (!ControlStyleCreated)
 162                                         return true; // default value
 163                                 return TableItemStyle.Wrap;
 164                         }
 165                         set { TableItemStyle.Wrap = value; }
 166                 }
 167                 public override bool SupportsDisabledAttribute {
 168                         get { return RenderingCompatibilityLessThan40; }
 169                 }
 170                 TableItemStyle TableItemStyle {
 171                         get { return (ControlStyle as TableItemStyle); }
 172                 }
 173
 174                 protected override void AddAttributesToRender (HtmlTextWriter writer)
 175                 {
 176                         base.AddAttributesToRender (writer);
 177                         if (writer == null)
 178                                 return;
 179
 180                         int i = ColumnSpan;
 181                         if (i > 0)
 182                                 writer.AddAttribute (HtmlTextWriterAttribute.Colspan, i.ToString (Helpers.InvariantCulture), false);
 183
 184                         i = RowSpan;
 185                         if (i > 0)
 186                                 writer.AddAttribute (HtmlTextWriterAttribute.Rowspan, i.ToString (Helpers.InvariantCulture), false);
 187                         string[] ahci = AssociatedHeaderCellID;
 188                         if (ahci.Length > 1) {
 189                                 StringBuilder sb = new StringBuilder ();
 190                                 for (i = 0; i < ahci.Length - 1; i++) {
 191                                         sb.Append (ahci [i]);
 192                                         sb.Append (",");
 193                                 }
 194                                 sb.Append (ahci.Length - 1);
 195                                 writer.AddAttribute (HtmlTextWriterAttribute.Headers, sb.ToString ());
 196                         } else if (ahci.Length == 1) {
 197                                 // most common case (without a StringBuilder)
 198                                 writer.AddAttribute (HtmlTextWriterAttribute.Headers, ahci [0]);
 199                         }
 200                 }
 201
 202                 protected override void AddParsedSubObject (object obj)
 203                 {
 204                         if (HasControls ()) {
 205                                 base.AddParsedSubObject (obj);
 206                                 return;
 207                         }
 208
 209                         LiteralControl lc = (obj as LiteralControl);
 210                         if (lc == null) {
 211                                 string s = Text;
 212                                 if (s.Length > 0) {
 213                                         Controls.Add (new LiteralControl (s));
 214                                         // remove from viewstate
 215                                         Text = null;
 216                                 }
 217                                 base.AddParsedSubObject(obj);
 218                         } else {
 219                                 // this will clear any existing controls
 220                                 Text = lc.Text;
 221                         }
 222                 }
 223
 224                 protected override Style CreateControlStyle ()
 225                 {
 226                         return new TableItemStyle (ViewState);
 227                 }
 228
 229                 protected internal
 230                 override void RenderContents (HtmlTextWriter writer)
 231                 {
 232                         if (HasControls () || HasRenderMethodDelegate ())
 233                                 base.RenderContents (writer);
 234                         else
 235                                 writer.Write (Text);
 236                 }
 237         }
 238 }
 239