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[generator] Add support for <ns-replace> metadata.#939
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Diagnostics.CodeAnalysis; | ||
| using System.Xml.Linq; | ||
| using Xamarin.Android.Tools; | ||
| namespace Java.Interop.Tools.Generator | ||
| { | ||
| public class NamespaceTransform | ||
Contributor There was a problem hiding this comment. Rando aside: would this be a good use case for C#9 Contributor There was a problem hiding this comment. Doesn't look like you can override primary constructors (?!), so this isn't a good use case. Contributor There was a problem hiding this comment. However, you can still use ContributorAuthor There was a problem hiding this comment. Reading through the link, I don't see any benefits to using | ||
| { | ||
| public string OldValue { get; } | ||
| public string NewValue { get; } | ||
| public bool IsStartsWith { get; } | ||
| public bool IsEndsWith { get; } | ||
| public NamespaceTransform (string oldValue, string newValue) | ||
| { | ||
| OldValue = oldValue; | ||
| NewValue = newValue; | ||
| if (OldValue.EndsWith (".", StringComparison.Ordinal)) { | ||
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| IsStartsWith = true; | ||
| OldValue = OldValue.Substring (0, OldValue.Length - 1); | ||
| } | ||
| if (OldValue.StartsWith (".", StringComparison.Ordinal)) { | ||
| IsEndsWith = true; | ||
| OldValue = OldValue.Substring (1); | ||
| } | ||
| } | ||
| public string ApplyInternal (string value) | ||
| { | ||
| string result; | ||
| while (true) { | ||
| result = ApplyInternal (value); | ||
| if (result == value) | ||
| return result; | ||
| value = result; | ||
| } | ||
| } | ||
| public string Apply (string value) | ||
| { | ||
| // Handle a "starts with" and "ends with" transform | ||
| if (IsStartsWith && IsEndsWith) { | ||
| if (value.Equals (OldValue, StringComparison.OrdinalIgnoreCase)) | ||
| return NewValue; | ||
| // Don't let this fall through | ||
| return value; | ||
| } | ||
| // Handle a "starts with" transform | ||
| if (IsStartsWith) { | ||
| if (value.StartsWith (OldValue, StringComparison.OrdinalIgnoreCase)) | ||
| return (NewValue + value.Substring (OldValue.Length)).TrimStart ('.'); | ||
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| return value; | ||
| } | ||
| // Handle an "ends with" transform | ||
| if (IsEndsWith) { | ||
| if (value.EndsWith (OldValue, StringComparison.OrdinalIgnoreCase)) | ||
| return (value.Substring (0, value.Length - OldValue.Length) + NewValue).TrimEnd ('.'); | ||
| return value; | ||
| } | ||
| // Handle an "anywhere" transform | ||
| var value_tokens = value.Split ('.'); | ||
| var match_tokens = OldValue.Split ('.'); | ||
| var results = new List<string> (); | ||
| for (var i = 0; i < value_tokens.Length; i++) { | ||
| if (AtMatch (value_tokens, i, match_tokens, 0)) { | ||
| if (NewValue.HasValue ()) | ||
| results.Add (NewValue); | ||
| i += match_tokens.Length - 1; | ||
| } else { | ||
| results.Add (value_tokens [i]); | ||
| } | ||
| } | ||
| return string.Join (".", results); | ||
| } | ||
| public static bool TryParse (XElement element, [NotNullWhen (true)] out NamespaceTransform? transform) | ||
| { | ||
| var source = element.XGetAttribute ("source"); | ||
| var replacement = element.XGetAttribute ("replacement"); | ||
| if (!source.HasValue () || replacement is null) { | ||
| Report.LogCodedWarning (0, Report.WarningInvalidNamespaceTransform, null, element, element.ToString ()); | ||
| transform = null; | ||
| return false; | ||
| } | ||
| transform = new NamespaceTransform (source, replacement); | ||
| return true; | ||
| } | ||
| private bool AtMatch (string [] valueTokens, int valueIndex, string [] matchTokens, int matchIndex) | ||
| { | ||
| if (matchIndex >= matchTokens.Length) | ||
| return true; | ||
| if (valueIndex >= valueTokens.Length) | ||
| return false; | ||
| if (string.Compare (valueTokens [valueIndex], matchTokens [matchIndex], StringComparison.OrdinalIgnoreCase) == 0) | ||
| return AtMatch (valueTokens, valueIndex + 1, matchTokens, matchIndex + 1); | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
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Should this be a
List<T>, or should it be aHashSet<T>?There was a problem hiding this comment.
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Order is significant, so we need to stick with
List.