HtmlImage.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » HtmlControls » C# / CSharp Open Source

//
// System.Web.UI.HtmlControls.HtmlImage.cs
//
// Author:
//  Dick Porter  <dick@ximian.com>
//
// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.ComponentModel;
using System.Globalization;
using System.Security.Permissions;
using System.Web.Util;

namespace System.Web.UI.HtmlControls{
  // CAS
  [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  // attributes
  [ControlBuilder (typeof (HtmlEmptyTagControlBuilder))]
  public class HtmlImage : HtmlControl 
  {
    public HtmlImage () : base ("img")
    {
    }

    [DefaultValue ("")]
    [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
    [WebSysDescription("")]
    [WebCategory("Layout")]
    public string Align {
      get {
        string align = Attributes["align"];

        if (align == null) {
          return (String.Empty);
        }
        
        return (align);
      }
      set {
        if (value == null) {
          Attributes.Remove ("align");
        } else {
          Attributes["align"] = value;
        }
      }
    }

    [DefaultValue ("")]
    [WebSysDescription("")]
    [WebCategory("Appearance")]
    [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
    [Localizable (true)]
    public string Alt {
      get {
        string alt = Attributes["alt"];

        if (alt == null) {
          return (String.Empty);
        }
        
        return (alt);
      }
      set {
        if (value == null) {
          Attributes.Remove ("alt");
        } else {
          Attributes["alt"] = value;
        }
      }
    }
  
    [DefaultValue (0)]
    [WebSysDescription("")]
    [WebCategory("Appearance")]
    [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
    public int Border {
      get {
        string border = Attributes["border"];
        
        if (border == null) {
          return (-1);
        } else {
          return (Int32.Parse (border, Helpers.InvariantCulture));
        }
      }
      set {
        if (value == -1) {
          Attributes.Remove ("border");
        } else {
          Attributes["border"] = value.ToString ();
        }
      }
    }

    [DefaultValue (100)]
    [WebSysDescription("")]
    [WebCategory("Layout")]
    [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
    public int Height {
      get {
        string height = Attributes["height"];
        
        if (height == null) {
          return (-1);
        } else {
          return (Int32.Parse (height, Helpers.InvariantCulture));
        }
      }
      set {
        if (value == -1) {
          Attributes.Remove ("height");
        } else {
          Attributes["height"] = value.ToString ();
        }
      }
    }
    
    [DefaultValue ("")]
    [WebSysDescription("")]
    [WebCategory("Behavior")]
    [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
    [UrlProperty]
    public string Src {
      get {
        string src = Attributes["src"];

        if (src == null) {
          return (String.Empty);
        }
        
        return (src);
      }
      set {
        if (value == null) {
          Attributes.Remove ("src");
        } else {
          Attributes["src"] = value;
        }
      }
    }

    [DefaultValue (100)]
    [WebSysDescription("")]
    [WebCategory("Layout")]
    [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
    public int Width {
      get {
        string width = Attributes["width"];

        if (width == null) {
          return (-1);
        }
        else {
          return (Int32.Parse (width, Helpers.InvariantCulture));
        }
      }
      set {
        if (value == -1) {
          Attributes.Remove ("width");
        } else {
          Attributes["width"] = value.ToString ();
        }
      }
    }

    protected override void RenderAttributes (HtmlTextWriter w)
    {
      PreProcessRelativeReference (w, "src");

      /* MS does not seem to render the src attribute if it
       * is empty. Firefox, at least, will fetch the current
       * page as the src="" if other img attributes exist.
       */
      string src = Attributes["src"];
      if (src == null || src.Length == 0)
        Attributes.Remove ("src");

      base.RenderAttributes (w);

      /* MS closes the HTML element at the end of
       * the attributes too, according to the nunit
       * tests
       */
      w.Write (" /");
    }
  }
}