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) 2005-2010 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         [ToolboxData("<{0}:HyperLink runat=\"server\">HyperLink</{0}:HyperLink>")]
  44         [DefaultProperty("Text")]
  45         [Designer("System.Web.UI.Design.WebControls.HyperLinkDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  46         public class HyperLink : WebControl
  47         {
  48                 public HyperLink () : base (HtmlTextWriterTag.A)
  49                 {
  50                 }
  51
  52                 protected override void AddAttributesToRender (HtmlTextWriter w)
  53                 {
  54                         base.AddAttributesToRender (w);
  55                         AddDisplayStyleAttribute (w);
  56                         if (!IsEnabled)
  57                                 return;
  58                         // add attributes - only if they're not empty
  59                         string t = Target;
  60                         string s = NavigateUrl;
  61                         if (s.Length > 0)
  62                                 w.AddAttribute (HtmlTextWriterAttribute.Href, ResolveClientUrl (s));
  63                         if (t.Length > 0)
  64                                 w.AddAttribute (HtmlTextWriterAttribute.Target, t);
  65                 }
  66
  67                 protected override void AddParsedSubObject (object obj)
  68                 {
  69                         if (HasControls ()) {
  70                                 base.AddParsedSubObject (obj);
  71                                 return;
  72                         }
  73
  74                         LiteralControl lc = obj as LiteralControl;
  75
  76                         if (lc == null) {
  77                                 string s = Text;
  78                                 if (s.Length != 0) {
  79                                         Text = null;
  80                                         Controls.Add (new LiteralControl (s));
  81                                 }
  82                                 base.AddParsedSubObject (obj);
  83                         } else
  84                                 Text = lc.Text;
  85                 }
  86
  87                 [MonoTODO ("Why override?")]
  88                 protected override void LoadViewState (object savedState)
  89                 {
  90                         base.LoadViewState (savedState);
  91                 }
  92
  93                 protected internal override void RenderContents (HtmlTextWriter w)
  94                 {
  95                         if (HasControls () || HasRenderMethodDelegate ()) {
  96                                 base.RenderContents (w);
  97                                 return;
  98                         }
  99                         string image_url = ImageUrl;
 100                         if (!String.IsNullOrEmpty (image_url)) {
 101                                 string str = ToolTip;
 102                                 if (!String.IsNullOrEmpty (str))
 103                                         w.AddAttribute (HtmlTextWriterAttribute.Title, str);
 104
 105                                 w.AddAttribute (HtmlTextWriterAttribute.Src, ResolveClientUrl (image_url));
 106                                 str = Text;
 107                                         w.AddAttribute (HtmlTextWriterAttribute.Alt, str);
 108                                 w.RenderBeginTag (HtmlTextWriterTag.Img);
 109                                 w.RenderEndTag ();
 110                         } else
 111                                 w.Write (Text);
 112                 }
 113
 114                 [Bindable(true)]
 115                 [DefaultValue("")]
 116                 [Editor("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 117                 [UrlProperty]
 118                 [WebSysDescription ("")]
 119                 [WebCategory ("Appearance")]
 120                 public virtual string ImageUrl {
 121                         get { return ViewState.GetString ("ImageUrl", String.Empty); }
 122                         set { ViewState ["ImageUrl"] = value; }
 123                 }
 124
 125                 [Bindable(true)]
 126                 [DefaultValue("")]
 127                 [Editor("System.Web.UI.Design.UrlEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 128                 [UrlProperty]
 129                 [WebSysDescription ("")]
 130                 [WebCategory ("Navigation")]
 131                 public string NavigateUrl {
 132                         get { return ViewState.GetString ("NavigateUrl", String.Empty); }
 133                         set { ViewState ["NavigateUrl"] = value; }
 134                 }
 135
 136                 [DefaultValue("")]
 137                 [TypeConverter(typeof(System.Web.UI.WebControls.TargetConverter))]
 138                 [WebSysDescription ("")]
 139                 [WebCategory ("Navigation")]
 140                 public string Target {
 141                         get { return ViewState.GetString ("Target", String.Empty); }
 142                         set { ViewState ["Target"] = value; }
 143                 }
 144
 145                 [Bindable(true)]
 146                 [DefaultValue("")]
 147                 [PersistenceMode(PersistenceMode.InnerDefaultProperty)]
 148                 [Localizable (true)]
 149                 [WebSysDescription ("")]
 150                 [WebCategory ("Appearance")]
 151                 public virtual string Text {
 152                         get { return ViewState.GetString ("Text", String.Empty); }
 153                         set {
 154                                 ViewState ["Text"] = value;
 155                                 if (HasControls ())
 156                                         Controls.Clear ();
 157                         }
 158                 }
 159                 public override bool SupportsDisabledAttribute {
 160                         get { return RenderingCompatibilityLessThan40; }
 161                 }
 162         }
 163 }