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//------------------------------------------------------------------------------
// <copyright file="MobileCategoryAttribute.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.MobileControls
{
using System;
using System.ComponentModel;
using System.Diagnostics;
[
AttributeUsage(AttributeTargets.All)
]
[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.")]
internal sealed class MobileCategoryAttribute : CategoryAttribute
{
private static MobileCategoryAttribute deviceSpecific;
private const String _categoryDeviceSpecific = "Category_DeviceSpecific";
private const String _categoryPrefix = "Category_";
private const String _usCategoryDeviceSpecific = "Device Specific";
private static readonly int _prefixLength = _categoryPrefix.Length;
// Initializes a new instance of the CategoryAttribute class.
internal /*public*/ MobileCategoryAttribute(String category) : base(category)
{
}
internal /*public*/ static CategoryAttribute DeviceSpecific
{
get
{
if (deviceSpecific == null)
{
deviceSpecific = new MobileCategoryAttribute(_categoryDeviceSpecific);
}
return deviceSpecific;
}
}
// This method is called the first time the category property
// is accessed. It provides a way to lookup a localized string for
// the given category. Classes may override this to add their
// own localized names to categories. If a localized string is
// available for the given value, the method should return it.
// Otherwise, it should return null.
protected override String GetLocalizedString(String value)
{
Debug.Assert(value != null);
String localizedValue = null;
int index = value.IndexOf(_categoryPrefix, StringComparison.Ordinal);
// mobile controls have "Category_" prefix.
if (index == 0)
{
String categoryName = value.Substring(_prefixLength);
// see if already defined in base class.
localizedValue = base.GetLocalizedString(categoryName);
}
// fall back to local resource string.
if (localizedValue == null)
{
localizedValue = (String) SR.GetString(value);
}
if (localizedValue == null && value.Equals(_usCategoryDeviceSpecific))
{
localizedValue = (String) SR.GetString(SR.Category_DeviceSpecific);
}
// This attribute is internal, and we should never have a missing resource string.
Debug.Assert(localizedValue != null,
"All MobileWebForms category attributes should have localized strings. Category '"
+ value + "' not found.");
return localizedValue;
}
}
}
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