diff options
Diffstat (limited to 'src/SMAPI/Utilities/AssetPathUtilities')
-rw-r--r-- | src/SMAPI/Utilities/AssetPathUtilities/AssetNamePartEnumerator.cs | 98 |
1 files changed, 51 insertions, 47 deletions
diff --git a/src/SMAPI/Utilities/AssetPathUtilities/AssetNamePartEnumerator.cs b/src/SMAPI/Utilities/AssetPathUtilities/AssetNamePartEnumerator.cs index 0840617a..11987ed6 100644 --- a/src/SMAPI/Utilities/AssetPathUtilities/AssetNamePartEnumerator.cs +++ b/src/SMAPI/Utilities/AssetPathUtilities/AssetNamePartEnumerator.cs @@ -1,66 +1,70 @@ using System; using ToolkitPathUtilities = StardewModdingAPI.Toolkit.Utilities.PathUtilities; -namespace StardewModdingAPI.Utilities.AssetPathUtilities; - -/// <summary> -/// A helper class that yields out each bit of an asset path -/// </summary> -internal ref struct AssetNamePartEnumerator +namespace StardewModdingAPI.Utilities.AssetPathUtilities { - private ReadOnlySpan<char> RemainderImpl; - - /// <summary> - /// Construct an instance. - /// </summary> - /// <param name="assetName">The asset name.</param> - internal AssetNamePartEnumerator(ReadOnlySpan<char> assetName) + /// <summary>Handles enumerating the normalized segments in an asset name.</summary> + internal ref struct AssetNamePartEnumerator { - this.RemainderImpl = AssetNamePartEnumerator.TrimLeadingPathSeparators(assetName); - } + /********* + ** Fields + *********/ + /// <summary>The backing field for <see cref="Remainder"/>.</summary> + private ReadOnlySpan<char> RemainderImpl; - /// <summary> - /// The remainder of the assetName (that hasn't been yielded out yet.) - /// </summary> - internal ReadOnlySpan<char> Remainder => this.RemainderImpl; - /// <summary> - /// The current segment. - /// </summary> - public ReadOnlySpan<char> Current { get; private set; } = default; + /********* + ** Properties + *********/ + /// <summary>The remainder of the asset name being enumerated, ignoring segments which have already been yielded.</summary> + public ReadOnlySpan<char> Remainder => this.RemainderImpl; - // this is just so it can be used in a foreach loop. - public AssetNamePartEnumerator GetEnumerator() => this; + /// <summary>Get the current segment.</summary> + public ReadOnlySpan<char> Current { get; private set; } = default; - /// <summary> - /// Moves the enumerator to the next element. - /// </summary> - /// <returns>True if there is a new</returns> - public bool MoveNext() - { - if (this.RemainderImpl.Length == 0) + + /********* + ** Public methods + *********/ + /// <summary>Construct an instance.</summary> + /// <param name="assetName">The asset name to enumerate.</param> + public AssetNamePartEnumerator(ReadOnlySpan<char> assetName) { - return false; + this.RemainderImpl = AssetNamePartEnumerator.TrimLeadingPathSeparators(assetName); } - int index = this.RemainderImpl.IndexOfAny(ToolkitPathUtilities.PossiblePathSeparators); - - // no more separator characters found, I'm done. - if (index < 0) + /// <summary>Move the enumerator to the next segment.</summary> + /// <returns>Returns true if a new value was found (accessible via <see cref="Current"/>).</returns> + public bool MoveNext() { - this.Current = this.RemainderImpl; - this.RemainderImpl = ReadOnlySpan<char>.Empty; + if (this.RemainderImpl.Length == 0) + return false; + + int index = this.RemainderImpl.IndexOfAny(ToolkitPathUtilities.PossiblePathSeparators); + + // no more separator characters found, I'm done. + if (index < 0) + { + this.Current = this.RemainderImpl; + this.RemainderImpl = ReadOnlySpan<char>.Empty; + return true; + } + + // Yield the next separate character bit + this.Current = this.RemainderImpl[..index]; + this.RemainderImpl = AssetNamePartEnumerator.TrimLeadingPathSeparators(this.RemainderImpl[(index + 1)..]); return true; } - // Yield the next separate character bit - this.Current = this.RemainderImpl[..index]; - this.RemainderImpl = AssetNamePartEnumerator.TrimLeadingPathSeparators(this.RemainderImpl[(index + 1)..]); - return true; - } - private static ReadOnlySpan<char> TrimLeadingPathSeparators(ReadOnlySpan<char> span) - { - return span.TrimStart(new ReadOnlySpan<char>(ToolkitPathUtilities.PossiblePathSeparators)); + /********* + ** Private methods + *********/ + /// <summary>Trim path separators at the start of the given path or segment.</summary> + /// <param name="span">The path or segment to trim.</param> + private static ReadOnlySpan<char> TrimLeadingPathSeparators(ReadOnlySpan<char> span) + { + return span.TrimStart(new ReadOnlySpan<char>(ToolkitPathUtilities.PossiblePathSeparators)); + } } } |