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

   1 //
   2 // System.Web.UI.WebControls.Label.cs
   3 //
   4 // Authors:
   5 //      Ben Maurer (bmaurer@novell.com)
   6 //
   7 // (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // TODO: Are we missing something in LoadViewState?
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.ComponentModel;
  32 using System.Security.Permissions;
  33
  34 namespace System.Web.UI.WebControls {
  35
  36         // CAS
  37         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         // attributes
  40         [ControlBuilder(typeof(HyperLinkControlBuilder))]
  41         [DataBindingHandler("System.Web.UI.Design.HyperLinkDataBindingHandler, " + Consts.AssemblySystem_Design)]
  42         [ParseChildren (false)]
  43 #if NET_2_0
  44         [ToolboxData("<{0}:HyperLink runat=\"server\">HyperLink</{0}:HyperLink>")]
  45 #else
  46         [ToolboxData("<{0}:HyperLink runat=server>HyperLink</{0}:HyperLink>")]
  47 #endif
  48         [DefaultProperty("Text")]
  49         [Designer("System.Web.UI.Design.WebControls.HyperLinkDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  50         public class HyperLink : WebControl {
  51
  52                 public HyperLink () : base (HtmlTextWriterTag.A)
  53                 {
  54                 }
  55
  56                 protected override void AddAttributesToRender (HtmlTextWriter w)
  57                 {
  58                         base.AddAttributesToRender (w);
  59 #if NET_2_0
  60                         AddDisplayStyleAttribute (w);
  61 #endif
  62                         if (!Enabled)
  63                                 return;
  64                         // add attributes - only if they're not empty
  65                         string t = Target;
  66                         string s = NavigateUrl;
  67                         if (s.Length > 0)
  68 #if TARGET_J2EE
  69                                 w.AddAttribute (HtmlTextWriterAttribute.Href, ResolveClientUrl (s, String.Compare (t, "_blank", StringComparison.InvariantCultureIgnoreCase) != 0));
  70 #else
  71                                 w.AddAttribute (HtmlTextWriterAttribute.Href, ResolveClientUrl (s));
  72 #endif
  73                         if (t.Length > 0)
  74                                 w.AddAttribute (HtmlTextWriterAttribute.Target, t);
  75                 }
  76
  77                 protected override void AddParsedSubObject (object obj)
  78                 {
  79                         if (HasControls ()) {
  80                                 base.AddParsedSubObject (obj);
  81                                 return;
  82                         }
  83
  84                         LiteralControl lc = obj as LiteralControl;
  85
  86                         if (lc == null) {
  87                                 string s = Text;
  88                                 if (s.Length != 0) {
  89                                         Text = null;
  90                                         Controls.Add (new LiteralControl (s));
  91                                 }
  92                                 base.AddParsedSubObject (obj);
  93                         } else {
  94                                 Text = lc.Text;
  95                         }
  96                 }
  97
  98
  99                 [MonoTODO ("Why override?")]
 100                 protected override void LoadViewState (object savedState)
 101                 {
 102                         base.LoadViewState (savedState);
 103                 }
 104
 105 #if NET_2_0
 106                 protected internal
 107 #else
 108                 protected
 109 #endif
 110                 override void RenderContents (HtmlTextWriter w)
 111                 {
 112                         if (HasControls () || HasRenderMethodDelegate ()) {
 113                                 base.RenderContents (w);
 114                                 return;
 115                         }
 116                         string image_url = ImageUrl;
 117                         if (image_url != "") {
 118                                 Image img = new Image ();
 119                                 img.ImageUrl = ResolveClientUrl (image_url);
 120                                 string str = Text;
 121                                 if (str != "")
 122                                         img.AlternateText = str;
 123                                 str = ToolTip;
 124                                 if (str != "")
 125                                         img.ToolTip = str;
 126                                 img.RenderControl (w);
 127                         } else {
 128                                 w.Write (Text);
 129                         }
 130
 131                 }
 132
 133                 [Bindable(true)]
 134                 [DefaultValue("")]
 135                 [Editor("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 136 #if NET_2_0
 137                 [UrlProperty]
 138 #endif
 139                 [WebSysDescription ("")]
 140                 [WebCategory ("Appearance")]
 141                 public virtual string ImageUrl {
 142                         get {
 143                                 return ViewState.GetString ("ImageUrl", "");
 144                         }
 145                         set {
 146                                 ViewState ["ImageUrl"] = value;
 147                         }
 148                 }
 149
 150                 [Bindable(true)]
 151                 [DefaultValue("")]
 152                 [Editor("System.Web.UI.Design.UrlEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 153 #if NET_2_0
 154                 [UrlProperty]
 155 #endif
 156                 [WebSysDescription ("")]
 157                 [WebCategory ("Navigation")]
 158                 public string NavigateUrl {
 159                         get {
 160                                 return ViewState.GetString ("NavigateUrl", "");
 161                         }
 162                         set {
 163                                 ViewState ["NavigateUrl"] = value;
 164                         }
 165                 }
 166
 167 #if ONLY_1_1
 168                 [Bindable(true)]
 169 #endif
 170                 [DefaultValue("")]
 171                 [TypeConverter(typeof(System.Web.UI.WebControls.TargetConverter))]
 172                 [WebSysDescription ("")]
 173                 [WebCategory ("Navigation")]
 174                 public string Target {
 175                         get {
 176                                 return ViewState.GetString ("Target", "");
 177                         }
 178                         set {
 179                                 ViewState ["Target"] = value;
 180                         }
 181                 }
 182
 183                 [Bindable(true)]
 184                 [DefaultValue("")]
 185                 [PersistenceMode(PersistenceMode.InnerDefaultProperty)]
 186 #if NET_2_0
 187                 [Localizable (true)]
 188 #endif
 189                 [WebSysDescription ("")]
 190                 [WebCategory ("Appearance")]
 191                 public virtual string Text {
 192                         get {
 193                                 return ViewState.GetString ("Text", "");
 194                         }
 195                         set {
 196                                 ViewState ["Text"] = value;
 197                                 if (HasControls ())
 198                                         Controls.Clear ();
 199                         }
 200                 }
 201         }
 202 }