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

   1 //
   2 // System.Web.UI.HtmlControls.HtmlInputButton.cs
   3 //
   4 // Authors:
   5 //      Jackson Harper (jackson@ximian.com)
   6 //
   7 // (C) 2005 Novell, Inc.
   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
  33 namespace System.Web.UI.HtmlControls {
  34
  35         // CAS
  36         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         // attributes
  39         [DefaultEventAttribute ("ServerClick")]
  40 #if NET_2_0
  41         [SupportsEventValidation]
  42 #endif
  43         public class HtmlInputButton : HtmlInputControl, IPostBackEventHandler {
  44
  45                 private static readonly object ServerClickEvent = new object();
  46
  47                 public HtmlInputButton () : this ("button")
  48                 {
  49                 }
  50
  51                 public HtmlInputButton (string type) :  base (type)
  52                 {
  53                 }
  54
  55                 [DefaultValue(true)]
  56                 [WebSysDescription("")]
  57                 [WebCategory("Behavior")]
  58 #if NET_2_0
  59                 public virtual
  60 #else
  61                 public
  62 #endif
  63                 bool CausesValidation {
  64                         get {
  65                                 string flag = Attributes["CausesValidation"];
  66
  67                                 if (flag == null)
  68                                         return true;
  69
  70                                 return Boolean.Parse (flag);
  71                         }
  72                         set {
  73                                 Attributes ["CausesValidation"] = value.ToString();
  74                         }
  75                 }
  76
  77 #if NET_2_0
  78                 [DefaultValue ("")]
  79                 public virtual string ValidationGroup
  80                 {
  81                         get {
  82                                 string group = Attributes["ValidationGroup"];
  83
  84                                 if (group == null)
  85                                         return "";
  86
  87                                 return group;
  88                         }
  89                         set {
  90                                 if (value == null)
  91                                         Attributes.Remove ("ValidationGroup");
  92                                 else
  93                                         Attributes["ValidationGroup"] = value;
  94                         }
  95                 }
  96 #endif
  97
  98                 void RaisePostBackEventInternal (string eventArgument)
  99                 {
 100                         if (CausesValidation)
 101 #if NET_2_0
 102                                 Page.Validate (ValidationGroup);
 103 #else
 104                                 Page.Validate ();
 105 #endif
 106                         OnServerClick (EventArgs.Empty);
 107                 }
 108
 109 #if NET_2_0
 110                 protected virtual void RaisePostBackEvent (string eventArgument)
 111                 {
 112                         RaisePostBackEventInternal (eventArgument);
 113                 }
 114 #endif
 115
 116                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
 117                 {
 118 #if NET_2_0
 119                         RaisePostBackEvent (eventArgument);
 120 #else
 121                         RaisePostBackEventInternal (eventArgument);
 122 #endif
 123                 }
 124
 125 #if NET_2_0
 126                 protected internal
 127 #else
 128                 protected
 129 #endif
 130                 override void OnPreRender (EventArgs e)
 131                 {
 132                         base.OnPreRender (e);
 133                         if (Events [ServerClickEvent] != null)
 134                                 Page.RequiresPostBackScript ();
 135                 }
 136
 137                 protected virtual void OnServerClick (EventArgs e)
 138                 {
 139                         EventHandler server_click = (EventHandler) Events [ServerClickEvent];
 140                         if (server_click != null)
 141                                 server_click (this, e);
 142                 }
 143
 144 #if !NET_2_0
 145                 bool RenderOnClick ()
 146                 {
 147                         if (Page == null || !CausesValidation)
 148                                 return false;
 149
 150                         CultureInfo inv = CultureInfo.InvariantCulture;
 151                         string input_type = Type;
 152                         if (0 == String.Compare (input_type, "submit", true, inv) &&
 153                                 Page.Validators.Count > 0)
 154                                 return true;
 155
 156                         if (0 == String.Compare (input_type, "button", true, inv) &&
 157                                 Events [ServerClickEvent] != null)
 158                                 return true;
 159
 160                         return false;
 161                 }
 162 #endif
 163
 164                 protected override void RenderAttributes (HtmlTextWriter writer)
 165                 {
 166 #if NET_2_0
 167                         CultureInfo inv = CultureInfo.InvariantCulture;
 168                         string input_type = Type;
 169                         if (0 != String.Compare (input_type, "reset", true, inv) &&
 170                                 ((0 == String.Compare (input_type, "submit", true, inv)) ||
 171                                 (0 == String.Compare (input_type, "button", true, inv) && Events [ServerClickEvent] != null))) {
 172
 173                                 string onclick = String.Empty;
 174                                 if (Attributes ["onclick"] != null) {
 175                                         onclick = ClientScriptManager.EnsureEndsWithSemicolon (Attributes ["onclick"] + onclick);
 176                                         Attributes.Remove ("onclick");
 177                                 }
 178                                 if (Page != null) {
 179                                         PostBackOptions options = GetPostBackOptions ();
 180                                         Page.ClientScript.RegisterForEventValidation (options);
 181                                         onclick += Page.ClientScript.GetPostBackEventReference (options);
 182                                 }
 183
 184                                 if (onclick.Length > 0) {
 185                                         writer.WriteAttribute ("onclick", onclick);
 186                                         writer.WriteAttribute ("language", "javascript");
 187                                 }
 188                         }
 189 #else
 190                         if (RenderOnClick ()) {
 191                                 string oc = null;
 192                                 ClientScriptManager csm = new ClientScriptManager (Page);
 193                                 if (Page.AreValidatorsUplevel ()) {
 194                                         oc = csm.GetClientValidationEvent ();
 195                                 } else if (Events [ServerClickEvent] != null) {
 196                                         oc = Attributes ["onclick"] + " " + csm.GetPostBackEventReference (this, "");
 197                                 }
 198
 199                                 if (oc != null) {
 200                                         writer.WriteAttribute ("language", "javascript");
 201                                         writer.WriteAttribute ("onclick", oc);
 202                                 }
 203                         }
 204 #endif
 205
 206                         Attributes.Remove ("CausesValidation");
 207 #if NET_2_0
 208                         // LAMESPEC: MS doesn't actually remove this
 209                         //attribute.  it shows up in the rendered
 210                         //output.
 211
 212                         // Attributes.Remove("ValidationGroup");
 213 #endif
 214                         base.RenderAttributes (writer);
 215                 }
 216
 217 #if NET_2_0
 218                 PostBackOptions GetPostBackOptions () {
 219                         PostBackOptions options = new PostBackOptions (this);
 220                         options.ValidationGroup = null;
 221                         options.ActionUrl = null;
 222                         options.Argument = "";
 223                         options.RequiresJavaScriptProtocol = false;
 224                         options.ClientSubmit = (0 != String.Compare (Type, "submit", true, CultureInfo.InvariantCulture));
 225                         options.PerformValidation = CausesValidation && Page != null && Page.Validators.Count > 0;
 226                         if (options.PerformValidation)
 227                                 options.ValidationGroup = ValidationGroup;
 228
 229                         return options;
 230                 }
 231 #endif
 232
 233                 [WebSysDescription("")]
 234                 [WebCategory("Action")]
 235                 public event EventHandler ServerClick {
 236                         add { Events.AddHandler (ServerClickEvent, value); }
 237                         remove { Events.RemoveHandler (ServerClickEvent, value); }
 238                 }
 239         }
 240
 241 }
 242