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

   1 //
   2 // System.Web.UI.WebControls.AdRotator
   3 //
   4 // Author:
   5 //        Ben Maurer <bmaurer@novell.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.Xml;
  30 using System.Collections;
  31 using System.ComponentModel;
  32 using System.Security.Permissions;
  33 using System.Web.Util;
  34
  35 namespace System.Web.UI.WebControls {
  36
  37         // CAS
  38         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  40         // attributes
  41         [DefaultEvent("AdCreated")]
  42         [DefaultProperty("AdvertisementFile")]
  43         [Designer("System.Web.UI.Design.WebControls.AdRotatorDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  44 #if NET_2_0
  45         [ToolboxData("<{0}:AdRotator runat=\"server\"></{0}:AdRotator>")]
  46 #else
  47         [ToolboxData("<{0}:AdRotator runat=\"server\" Height=\"60px\" Width=\"468px\"></{0}:AdRotator>")]
  48 #endif
  49         public class AdRotator :
  50 #if NET_2_0
  51         DataBoundControl
  52 #else
  53         WebControl
  54 #endif
  55         {
  56 #if NET_2_0
  57                 protected internal override void OnInit (EventArgs e)
  58                 {
  59                         base.OnInit(e);
  60                 }
  61 #endif
  62
  63 #if NET_2_0
  64                 protected internal
  65 #else
  66                 protected
  67 #endif
  68                 override void OnPreRender (EventArgs eee)
  69                 {
  70                         Hashtable ht = null;
  71
  72                         if (ad_file != "" && ad_file != null) {
  73                                 ReadAdsFromFile (Page.MapPath (ad_file));
  74                                 ht = ChooseAd ();
  75                         }
  76
  77                         AdCreatedEventArgs e = new AdCreatedEventArgs (ht);
  78                         OnAdCreated (e);
  79                         createdargs = e;
  80
  81                 }
  82
  83 #if NET_2_0
  84                 [MonoTODO ("Not implemented")]
  85                 protected internal override void PerformDataBinding (IEnumerable data)
  86                 {
  87                         throw new NotImplementedException ();
  88                 }
  89
  90                 [MonoTODO ("Not implemented")]
  91                 protected override void PerformSelect ()
  92                 {
  93                         throw new NotImplementedException ();
  94                 }
  95 #endif
  96
  97                 AdCreatedEventArgs createdargs;
  98
  99 #if NET_2_0
 100                 protected internal
 101 #else
 102                 protected
 103 #endif
 104                 override void Render (HtmlTextWriter w)
 105                 {
 106                         AdCreatedEventArgs e = createdargs;
 107
 108                         base.AddAttributesToRender (w);
 109
 110                         if (e.NavigateUrl != null && e.NavigateUrl.Length > 0)
 111                                 w.AddAttribute (HtmlTextWriterAttribute.Href, ResolveAdUrl (e.NavigateUrl));
 112                         if (Target != null && Target.Length > 0)
 113                                 w.AddAttribute (HtmlTextWriterAttribute.Target, Target);
 114
 115                         w.RenderBeginTag (HtmlTextWriterTag.A);
 116
 117                         if (e.ImageUrl != null && e.ImageUrl.Length > 0)
 118                                 w.AddAttribute (HtmlTextWriterAttribute.Src, ResolveAdUrl (e.ImageUrl));
 119
 120                         w.AddAttribute (HtmlTextWriterAttribute.Alt, e.AlternateText == null ? "" : e.AlternateText);
 121                         w.AddAttribute (HtmlTextWriterAttribute.Border, "0");
 122                         w.RenderBeginTag (HtmlTextWriterTag.Img);
 123                         w.RenderEndTag (); // img
 124                         w.RenderEndTag (); // a
 125                 }
 126
 127                 string ResolveAdUrl (string url)
 128                 {
 129                         string path = url;
 130
 131                         if (AdvertisementFile != null && AdvertisementFile.Length > 0 && path [0] != '/' && path [0] != '~'
 132 #if NET_2_0
 133                                 && !Uri.IsWellFormedUriString (path, UriKind.Absolute)
 134 #endif
 135                                 )
 136                                 return UrlUtils.Combine (UrlUtils.GetDirectory (ResolveUrl (AdvertisementFile)), path);
 137
 138                         return ResolveUrl (path);
 139                 }
 140
 141                 //
 142                 // We take all the ads in the ad file and add up their
 143                 // impression weight. We then take a random number [0,
 144                 // TotalImpressions). We then choose the ad that is
 145                 // that number or less impressions for the beginning
 146                 // of the file. This lets us respect the weights
 147                 // given.
 148                 //
 149                 Hashtable ChooseAd ()
 150                 {
 151                         // cache for performance
 152                         string KeywordFilter = this.KeywordFilter;
 153
 154                         int total_imp = 0;
 155                         int cur_imp = 0;
 156
 157                         foreach (Hashtable a in ads) {
 158                                 if (KeywordFilter == "" || KeywordFilter == (string) a ["Keyword"])
 159                                         total_imp += a ["Impressions"] != null ? int.Parse ((string) a ["Impressions"]) : 1;
 160                         }
 161
 162                         int r = new Random ().Next (total_imp);
 163
 164                         foreach (Hashtable a in ads) {
 165                                 if (KeywordFilter != "" && KeywordFilter != (string) a ["Keyword"])
 166                                         continue;
 167                                 cur_imp += a ["Impressions"] != null ? int.Parse ((string) a ["Impressions"]) : 1;
 168
 169                                 if (cur_imp > r)
 170                                         return a;
 171                         }
 172
 173                         if (total_imp != 0)
 174                                 throw new Exception ("I should only get here if no ads matched");
 175
 176                         return null;
 177                 }
 178
 179                 ArrayList ads = new ArrayList ();
 180
 181                 void ReadAdsFromFile (string s)
 182                 {
 183                         XmlDocument d = new XmlDocument ();
 184                         try {
 185                                 d.Load (s);
 186                         } catch (Exception e) {
 187                                 throw new HttpException ("AdRotator could not parse the xml file", e);
 188                         }
 189
 190                         ads.Clear ();
 191
 192                         foreach (XmlNode n in d.DocumentElement.ChildNodes) {
 193
 194                                 Hashtable ad = new Hashtable ();
 195
 196                                 foreach (XmlNode nn in n.ChildNodes)
 197                                         ad.Add (nn.Name, nn.InnerText);
 198
 199                                 ads.Add (ad);
 200                         }
 201                 }
 202
 203                 string ad_file = "";
 204
 205 #if NET_2_0
 206                 [UrlProperty]
 207 #endif
 208                 [Bindable(true)]
 209                 [DefaultValue("")]
 210                 [Editor("System.Web.UI.Design.XmlUrlEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
 211                 [WebSysDescription("")]
 212                 [WebCategory("Behavior")]
 213                 public string AdvertisementFile {
 214                         get {
 215                                 return ad_file;
 216                         }
 217                         set {
 218                                 ad_file = value;
 219                         }
 220
 221                 }
 222
 223 #if NET_2_0
 224                 [DefaultValue ("AlternateText")]
 225                 [WebSysDescriptionAttribute ("")]
 226                 [WebCategoryAttribute ("Behavior")]
 227                 [MonoTODO ("Not implemented")]
 228                 public string AlternateTextField
 229                 {
 230                         get {
 231                                 throw new NotImplementedException ();
 232                         }
 233                         set {
 234                                 throw new NotImplementedException ();
 235                         }
 236                 }
 237 #endif
 238
 239                 [Browsable(false)]
 240                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 241                 [EditorBrowsable(EditorBrowsableState.Never)]
 242                 public override FontInfo Font {
 243                         get {
 244                                 return base.Font;
 245                         }
 246                 }
 247
 248 #if NET_2_0
 249                 [DefaultValue ("ImageUrl")]
 250                 [MonoTODO ("Not implemented")]
 251                 [WebSysDescriptionAttribute ("")]
 252                 [WebCategoryAttribute ("Behavior")]
 253                 public string ImageUrlField
 254                 {
 255                         get {
 256                                 throw new NotImplementedException ();
 257                         }
 258                         set {
 259                                 throw new NotImplementedException ();
 260                         }
 261                 }
 262 #endif
 263
 264
 265                 [Bindable(true)]
 266                 [DefaultValue("")]
 267                 [WebSysDescription("")]
 268                 [WebCategory("Behavior")]
 269                 public string KeywordFilter {
 270                         get {
 271                                 return ViewState.GetString ("KeywordFilter", "");
 272                         }
 273                         set {
 274                                 ViewState ["KeywordFilter"] = value;
 275                         }
 276
 277                 }
 278
 279 #if NET_2_0
 280                 [DefaultValue ("NavigateUrl")]
 281                 [MonoTODO ("Not implemented")]
 282                 [WebSysDescriptionAttribute ("")]
 283                 [WebCategoryAttribute ("Behavior")]
 284                 public string NavigateUrlField
 285                 {
 286                         get {
 287                                 throw new NotImplementedException ();
 288                         }
 289                         set {
 290                                 throw new NotImplementedException ();
 291                         }
 292                 }
 293 #endif
 294
 295                 [Bindable(true)]
 296                 [DefaultValue("_top")]
 297                 [TypeConverter(typeof(System.Web.UI.WebControls.TargetConverter))]
 298                 [WebSysDescription("")]
 299                 [WebCategory("Behavior")]
 300                 public string Target {
 301                         get {
 302                                 return ViewState.GetString ("Target", "_top");
 303                         }
 304                         set {
 305                                 ViewState ["Target"] = value;
 306                         }
 307
 308                 }
 309
 310 #if NET_2_0
 311                 /* all these are listed in corcompare */
 312                 public override string UniqueID
 313                 {
 314                         get {
 315                                 return base.UniqueID;
 316                         }
 317                 }
 318
 319                 protected override HtmlTextWriterTag TagKey
 320                 {
 321                         get {
 322                                 return base.TagKey;
 323                         }
 324                 }
 325 #endif
 326
 327                 protected virtual void OnAdCreated (AdCreatedEventArgs e)
 328                 {
 329                         AdCreatedEventHandler h = (AdCreatedEventHandler) Events [AdCreatedEvent];
 330                         if (h != null)
 331                                 h (this, e);
 332                 }
 333
 334                 static readonly object AdCreatedEvent = new object ();
 335
 336                 [WebSysDescription("")]
 337                 [WebCategory("Action")]
 338                 public event AdCreatedEventHandler AdCreated {
 339                         add { Events.AddHandler (AdCreatedEvent, value); }
 340                         remove { Events.RemoveHandler (AdCreatedEvent, value); }
 341                 }
 342         }
 343 }