ChtmlImageAdapter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Adapters / ChtmlImageAdapter.cs / 1305376 / ChtmlImageAdapter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System.Globalization; 
using System.Web.UI.MobileControls.Adapters; 
using System.Security.Permissions;
 
#if COMPILING_FOR_SHIPPED_SOURCE
namespace System.Web.UI.MobileControls.ShippedAdapterSource
#else
namespace System.Web.UI.MobileControls.Adapters 
#endif
 
{ 
    /*
     * ChtmlImageAdapter class. 
     */
    /// 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    public class ChtmlImageAdapter : HtmlImageAdapter 
    { 
        /// 
        protected internal override void RenderImage(HtmlMobileTextWriter writer) 
        {
            String source = Control.ImageUrl;

            if (source.StartsWith(Constants.SymbolProtocol, StringComparison.Ordinal) && 
                (Device.SupportsIModeSymbols || Device.SupportsJPhoneSymbols))
            { 
                if (Device.SupportsIModeSymbols) 
                {
                    writer.Write("&#"); 
                    writer.Write(
                        source.Substring(Constants.SymbolProtocol.Length));
                    writer.Write(";");
                } 
                else
                { 
                    // The ImageUrl should be in the format "symbol:xyyy", 
                    // where x is group picture character (either G, E or F),
                    // and yyy (length can vary) is the picture's character 
                    // code (in decimal).
                    String symbolChars = source.Substring(
                                            Constants.SymbolProtocol.Length);
                    char code = DecimalStringToChar(symbolChars.Substring(1)); 

                    writer.Write("\u001B$"); 
                    writer.Write(Char.ToUpper(symbolChars[0], CultureInfo.InvariantCulture)); 
                    writer.Write(code);
                    writer.Write('\u000F'); 
                }
            }
            else
            { 
                base.RenderImage(writer);
            } 
        } 

        // Convert decimal string "xxx" to '\u00xx' 
        private char DecimalStringToChar(String decimalString)
        {
            int codeValue = 0;
            int adj = 1; 

            for (int i = decimalString.Length - 1; i >= 0; i--) 
            { 
                codeValue += DecimalCharToInt(decimalString[i]) * adj;
                adj *= 10; 
            }

            return (char) codeValue;
        } 

        // Convert decimal char 'x' to decimal integer value x 
        private int DecimalCharToInt(char decimalChar) 
        {
            int i; 

            if (decimalChar >= '0' && decimalChar <= '9')
            {
                i = decimalChar - '0'; 
            }
            else 
            { 
                throw new ArgumentException(
                    SR.GetString(SR.ChtmlImageAdapterDecimalCodeExpectedAfterGroupChar), 
                    "ImageUrl");
            }

            return i; 
        }
 
        ///  
        protected override void AddAttributes(HtmlMobileTextWriter writer)
        { 
            AddAccesskeyAttribute(writer);
            AddJPhoneMultiMediaAttributes(writer);
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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