mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlImage.cs

   1 //
   2 // System.Web.UI.HtmlControls.HtmlImage.cs
   3 //
   4 // Author:
   5 //      Dick Porter  <dick@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.Globalization;
  31 using System.Security.Permissions;
  32 using System.Web.Util;
  33
  34 namespace System.Web.UI.HtmlControls
  35 {
  36         // CAS
  37         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         // attributes
  40         [ControlBuilder (typeof (HtmlEmptyTagControlBuilder))]
  41         public class HtmlImage : HtmlControl
  42         {
  43                 public HtmlImage () : base ("img")
  44                 {
  45                 }
  46
  47                 [DefaultValue ("")]
  48                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  49                 [WebSysDescription("")]
  50                 [WebCategory("Layout")]
  51                 public string Align {
  52                         get {
  53                                 string align = Attributes["align"];
  54
  55                                 if (align == null) {
  56                                         return (String.Empty);
  57                                 }
  58
  59                                 return (align);
  60                         }
  61                         set {
  62                                 if (value == null) {
  63                                         Attributes.Remove ("align");
  64                                 } else {
  65                                         Attributes["align"] = value;
  66                                 }
  67                         }
  68                 }
  69
  70                 [DefaultValue ("")]
  71                 [WebSysDescription("")]
  72                 [WebCategory("Appearance")]
  73                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  74                 [Localizable (true)]
  75                 public string Alt {
  76                         get {
  77                                 string alt = Attributes["alt"];
  78
  79                                 if (alt == null) {
  80                                         return (String.Empty);
  81                                 }
  82
  83                                 return (alt);
  84                         }
  85                         set {
  86                                 if (value == null) {
  87                                         Attributes.Remove ("alt");
  88                                 } else {
  89                                         Attributes["alt"] = value;
  90                                 }
  91                         }
  92                 }
  93
  94                 [DefaultValue (0)]
  95                 [WebSysDescription("")]
  96                 [WebCategory("Appearance")]
  97                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  98                 public int Border {
  99                         get {
 100                                 string border = Attributes["border"];
 101
 102                                 if (border == null) {
 103                                         return (-1);
 104                                 } else {
 105                                         return (Int32.Parse (border, Helpers.InvariantCulture));
 106                                 }
 107                         }
 108                         set {
 109                                 if (value == -1) {
 110                                         Attributes.Remove ("border");
 111                                 } else {
 112                                         Attributes["border"] = value.ToString ();
 113                                 }
 114                         }
 115                 }
 116
 117                 [DefaultValue (100)]
 118                 [WebSysDescription("")]
 119                 [WebCategory("Layout")]
 120                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 121                 public int Height {
 122                         get {
 123                                 string height = Attributes["height"];
 124
 125                                 if (height == null) {
 126                                         return (-1);
 127                                 } else {
 128                                         return (Int32.Parse (height, Helpers.InvariantCulture));
 129                                 }
 130                         }
 131                         set {
 132                                 if (value == -1) {
 133                                         Attributes.Remove ("height");
 134                                 } else {
 135                                         Attributes["height"] = value.ToString ();
 136                                 }
 137                         }
 138                 }
 139
 140                 [DefaultValue ("")]
 141                 [WebSysDescription("")]
 142                 [WebCategory("Behavior")]
 143                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 144                 [UrlProperty]
 145                 public string Src {
 146                         get {
 147                                 string src = Attributes["src"];
 148
 149                                 if (src == null) {
 150                                         return (String.Empty);
 151                                 }
 152
 153                                 return (src);
 154                         }
 155                         set {
 156                                 if (value == null) {
 157                                         Attributes.Remove ("src");
 158                                 } else {
 159                                         Attributes["src"] = value;
 160                                 }
 161                         }
 162                 }
 163
 164                 [DefaultValue (100)]
 165                 [WebSysDescription("")]
 166                 [WebCategory("Layout")]
 167                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 168                 public int Width {
 169                         get {
 170                                 string width = Attributes["width"];
 171
 172                                 if (width == null) {
 173                                         return (-1);
 174                                 }
 175                                 else {
 176                                         return (Int32.Parse (width, Helpers.InvariantCulture));
 177                                 }
 178                         }
 179                         set {
 180                                 if (value == -1) {
 181                                         Attributes.Remove ("width");
 182                                 } else {
 183                                         Attributes["width"] = value.ToString ();
 184                                 }
 185                         }
 186                 }
 187
 188                 protected override void RenderAttributes (HtmlTextWriter w)
 189                 {
 190                         PreProcessRelativeReference (w, "src");
 191
 192                         /* MS does not seem to render the src attribute if it
 193                          * is empty. Firefox, at least, will fetch the current
 194                          * page as the src="" if other img attributes exist.
 195                          */
 196                         string src = Attributes["src"];
 197                         if (src == null || src.Length == 0)
 198                                 Attributes.Remove ("src");
 199
 200                         base.RenderAttributes (w);
 201
 202                         /* MS closes the HTML element at the end of
 203                          * the attributes too, according to the nunit
 204                          * tests
 205                          */
 206                         w.Write (" /");
 207                 }
 208         }
 209 }