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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable disable
using System;
namespace MS.Internal.Xaml.Parser
{
internal class XamlQualifiedName : XamlName
{
public XamlQualifiedName(string prefix, string name)
: base(prefix, name)
{
}
public override string ScopedName
{
get
{
return string.IsNullOrEmpty(Prefix) ?
Name :
$"{Prefix}:{Name}";
}
}
internal static bool IsNameValid(string name)
{
if (name.Length == 0)
{
return false;
}
if (!IsValidNameStartChar(name[0]))
{
return false;
}
for (int i = 1; i < name.Length; i++)
{
if (!IsValidQualifiedNameChar(name[i]))
{
return false;
}
}
return true;
}
internal static bool IsNameValid_WithPlus(string name)
{
if (name.Length == 0)
{
return false;
}
if (!IsValidNameStartChar(name[0]))
{
return false;
}
for (int i = 1; i < name.Length; i++)
{
if (!IsValidQualifiedNameCharPlus(name[i]))
{
return false;
}
}
return true;
}
public static bool Parse(string longName, out string prefix, out string name)
{
int start = 0;
int colonIdx = longName.IndexOf(':');
prefix = string.Empty;
name = string.Empty;
if (colonIdx != -1)
{
prefix = longName.Substring(start, colonIdx);
if (String.IsNullOrEmpty(prefix) || !IsNameValid(prefix))
{
return false;
}
start = colonIdx + 1;
}
name = (start==0) ? longName : longName.Substring(start);
// we allow Internal type name (ie. Foo+Bar) on "trival" ie. "non-generic" type names.
// This is back compat with 3.0.
// Don't want to allow it in any of the new type name syntax. (including trival typeArgs)
if (String.IsNullOrEmpty(name) || !IsNameValid_WithPlus(name))
{
return false;
}
return true;
}
}
}
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