106 lines
4.0 KiB
C#
106 lines
4.0 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="ChtmlImageAdapter.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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using System.Globalization;
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using System.Web.UI.MobileControls.Adapters;
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using System.Security.Permissions;
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#if COMPILING_FOR_SHIPPED_SOURCE
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namespace System.Web.UI.MobileControls.ShippedAdapterSource
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#else
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namespace System.Web.UI.MobileControls.Adapters
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#endif
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{
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/*
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* ChtmlImageAdapter class.
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*/
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/// <include file='doc\ChtmlImageAdapter.uex' path='docs/doc[@for="ChtmlImageAdapter"]/*' />
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[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
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[AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
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[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.")]
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public class ChtmlImageAdapter : HtmlImageAdapter
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{
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/// <include file='doc\ChtmlImageAdapter.uex' path='docs/doc[@for="ChtmlImageAdapter.RenderImage"]/*' />
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protected internal override void RenderImage(HtmlMobileTextWriter writer)
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{
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String source = Control.ImageUrl;
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if (source.StartsWith(Constants.SymbolProtocol, StringComparison.Ordinal) &&
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(Device.SupportsIModeSymbols || Device.SupportsJPhoneSymbols))
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{
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if (Device.SupportsIModeSymbols)
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{
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writer.Write("&#");
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writer.Write(
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source.Substring(Constants.SymbolProtocol.Length));
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writer.Write(";");
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}
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else
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{
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// The ImageUrl should be in the format "symbol:xyyy",
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// where x is group picture character (either G, E or F),
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// and yyy (length can vary) is the picture's character
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// code (in decimal).
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String symbolChars = source.Substring(
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Constants.SymbolProtocol.Length);
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char code = DecimalStringToChar(symbolChars.Substring(1));
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writer.Write("\u001B$");
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writer.Write(Char.ToUpper(symbolChars[0], CultureInfo.InvariantCulture));
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writer.Write(code);
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writer.Write('\u000F');
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}
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}
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else
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{
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base.RenderImage(writer);
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}
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}
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// Convert decimal string "xxx" to '\u00xx'
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private char DecimalStringToChar(String decimalString)
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{
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int codeValue = 0;
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int adj = 1;
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for (int i = decimalString.Length - 1; i >= 0; i--)
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{
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codeValue += DecimalCharToInt(decimalString[i]) * adj;
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adj *= 10;
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}
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return (char) codeValue;
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}
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// Convert decimal char 'x' to decimal integer value x
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private int DecimalCharToInt(char decimalChar)
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{
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int i;
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if (decimalChar >= '0' && decimalChar <= '9')
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{
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i = decimalChar - '0';
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}
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else
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{
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throw new ArgumentException(
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SR.GetString(SR.ChtmlImageAdapterDecimalCodeExpectedAfterGroupChar),
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"ImageUrl");
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}
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return i;
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}
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/// <include file='doc\ChtmlImageAdapter.uex' path='docs/doc[@for="ChtmlImageAdapter.AddAttributes"]/*' />
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protected override void AddAttributes(HtmlMobileTextWriter writer)
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{
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AddAccesskeyAttribute(writer);
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AddJPhoneMultiMediaAttributes(writer);
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}
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}
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}
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