/// <summary>Converts the specified string to title case (except for words that are entirely in uppercase, which are considered to be acronyms).</summary>
/// <param name="str">The string to convert to title case. </param>
/// <returns>The specified string converted to title case.</returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="str" /> is <see langword="null" />. </exception>
// Token: 0x060030A3 RID: 12451 RVA: 0x000B9EFC File Offset: 0x000B80FC
public string ToTitleCase(string str)
{
if (str == null)
{
throw new ArgumentNullException("str");
}
if (str.Length == 0)
{
return(str);
}
StringBuilder stringBuilder = new StringBuilder();
string text = null;
for (int i = 0; i < str.Length; i++)
{
int num;
UnicodeCategory unicodeCategory = CharUnicodeInfo.InternalGetUnicodeCategory(str, i, out num);
if (char.CheckLetter(unicodeCategory))
{
i = this.AddTitlecaseLetter(ref stringBuilder, ref str, i, num) + 1;
int num2 = i;
bool flag = unicodeCategory == UnicodeCategory.LowercaseLetter;
while (i < str.Length)
{
unicodeCategory = CharUnicodeInfo.InternalGetUnicodeCategory(str, i, out num);
if (TextInfo.IsLetterCategory(unicodeCategory))
{
if (unicodeCategory == UnicodeCategory.LowercaseLetter)
{
flag = true;
}
i += num;
}
else if (str[i] == '\'')
{
i++;
if (flag)
{
if (text == null)
{
text = this.ToLower(str);
}
stringBuilder.Append(text, num2, i - num2);
}
else
{
stringBuilder.Append(str, num2, i - num2);
}
num2 = i;
flag = true;
}
else
{
if (TextInfo.IsWordSeparator(unicodeCategory))
{
break;
}
i += num;
}
}
int num3 = i - num2;
if (num3 > 0)
{
if (flag)
{
if (text == null)
{
text = this.ToLower(str);
}
stringBuilder.Append(text, num2, num3);
}
else
{
stringBuilder.Append(str, num2, num3);
}
}
if (i < str.Length)
{
i = TextInfo.AddNonLetter(ref stringBuilder, ref str, i, num);
}
}
else
{
i = TextInfo.AddNonLetter(ref stringBuilder, ref str, i, num);
}
}
return(stringBuilder.ToString());
}
/// <summary>将指定字符串转换为标题大写（全部大写将被视为首字母缩写的词不包含在内）。</summary>
/// <returns>转换为标题大写的指定字符串。</returns>
/// <param name="str">转换为标题大写的字符串。</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="str" /> is null. </exception>
public string ToTitleCase(string str)
{
if (str == null)
{
throw new ArgumentNullException("str");
}
if (str.Length == 0)
{
return(str);
}
StringBuilder result = new StringBuilder();
string str1 = (string)null;
int index1;
for (int index2 = 0; index2 < str.Length; index2 = index1 + 1)
{
int charLength;
UnicodeCategory unicodeCategory1 = CharUnicodeInfo.InternalGetUnicodeCategory(str, index2, out charLength);
if (char.CheckLetter(unicodeCategory1))
{
index1 = this.AddTitlecaseLetter(ref result, ref str, index2, charLength) + 1;
int startIndex = index1;
bool flag = unicodeCategory1 == UnicodeCategory.LowercaseLetter;
while (index1 < str.Length)
{
UnicodeCategory unicodeCategory2 = CharUnicodeInfo.InternalGetUnicodeCategory(str, index1, out charLength);
if (TextInfo.IsLetterCategory(unicodeCategory2))
{
if (unicodeCategory2 == UnicodeCategory.LowercaseLetter)
{
flag = true;
}
index1 += charLength;
}
else if ((int)str[index1] == 39)
{
++index1;
if (flag)
{
if (str1 == null)
{
str1 = this.ToLower(str);
}
result.Append(str1, startIndex, index1 - startIndex);
}
else
{
result.Append(str, startIndex, index1 - startIndex);
}
startIndex = index1;
flag = true;
}
else if (!TextInfo.IsWordSeparator(unicodeCategory2))
{
index1 += charLength;
}
else
{
break;
}
}
int count = index1 - startIndex;
if (count > 0)
{
if (flag)
{
if (str1 == null)
{
str1 = this.ToLower(str);
}
result.Append(str1, startIndex, count);
}
else
{
result.Append(str, startIndex, count);
}
}
if (index1 < str.Length)
{
index1 = TextInfo.AddNonLetter(ref result, ref str, index1, charLength);
}
}
else
{
index1 = TextInfo.AddNonLetter(ref result, ref str, index2, charLength);
}
}
return(result.ToString());
}