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//------------------------------------------------------------------------------
// <copyright file="ChtmlImageAdapter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
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.
*/
/// <include file='doc\ChtmlImageAdapter.uex' path='docs/doc[@for="ChtmlImageAdapter"]/*' />
[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
{
/// <include file='doc\ChtmlImageAdapter.uex' path='docs/doc[@for="ChtmlImageAdapter.RenderImage"]/*' />
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;
}
/// <include file='doc\ChtmlImageAdapter.uex' path='docs/doc[@for="ChtmlImageAdapter.AddAttributes"]/*' />
protected override void AddAttributes(HtmlMobileTextWriter writer)
{
AddAccesskeyAttribute(writer);
AddJPhoneMultiMediaAttributes(writer);
}
}
}
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