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String.Capitalize() in C# now matches the behaviour of String::capitalize() in C++

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This commit is contained in:
Igor Kordiukiewicz 2022-01-23 04:37:34 +01:00
parent e363f404a5
commit 6c3b6664b5
1 changed files with 46 additions and 1 deletions
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47
modules/mono/glue/GodotSharp/GodotSharp/Core/StringExtensions.cs
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@ -266,7 +266,7 @@ namespace Godot
/// <returns>The capitalized string.</returns>
public static string Capitalize(this string instance)
{
string aux = instance.Replace("_", " ").ToLower();
string aux = instance.CamelcaseToUnderscore(true).Replace("_", " ").Trim();
string cap = string.Empty;
for (int i = 0; i < aux.GetSliceCount(" "); i++)
@ -284,6 +284,51 @@ namespace Godot
return cap;
}
private static string CamelcaseToUnderscore(this string instance, bool lowerCase)
{
string newString = string.Empty;
int startIndex = 0;
for (int i = 1; i < instance.Length; i++)
{
bool isUpper = char.IsUpper(instance[i]);
bool isNumber = char.IsDigit(instance[i]);
bool areNext2Lower = false;
bool isNextLower = false;
bool isNextNumber = false;
bool wasPrecedentUpper = char.IsUpper(instance[i - 1]);
bool wasPrecedentNumber = char.IsDigit(instance[i - 1]);
if (i + 2 < instance.Length)
{
areNext2Lower = char.IsLower(instance[i + 1]) && char.IsLower(instance[i + 2]);
}
if (i + 1 < instance.Length)
{
isNextLower = char.IsLower(instance[i + 1]);
isNextNumber = char.IsDigit(instance[i + 1]);
}
bool condA = isUpper && !wasPrecedentUpper && !wasPrecedentNumber;
bool condB = wasPrecedentUpper && isUpper && areNext2Lower;
bool condC = isNumber && !wasPrecedentNumber;
bool canBreakNumberLetter = isNumber && !wasPrecedentNumber && isNextLower;
bool canBreakLetterNumber = !isNumber && wasPrecedentNumber && (isNextLower || isNextNumber);
bool shouldSplit = condA || condB || condC || canBreakNumberLetter || canBreakLetterNumber;
if (shouldSplit)
{
newString += instance.Substring(startIndex, i - startIndex) + "_";
startIndex = i;
}
}
newString += instance.Substring(startIndex, instance.Length - startIndex);
return lowerCase ? newString.ToLower() : newString;
}
/// <summary>
/// Performs a case-sensitive comparison to another string, return -1 if less, 0 if equal and +1 if greater.
/// </summary>