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(13984100) Implement AttributedString UTF8 and UTF16 views
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139 changes: 139 additions & 0 deletions
139
Sources/FoundationEssentials/AttributedString/AttributedString+UTF16View.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // This source file is part of the Swift.org open source project | ||
| // | ||
| // Copyright (c) 2024 Apple Inc. and the Swift project authors | ||
| // Licensed under Apache License v2.0 with Runtime Library Exception | ||
| // | ||
| // See https://swift.org/LICENSE.txt for license information | ||
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
|
|
||
| #if FOUNDATION_FRAMEWORK | ||
| @_spi(Unstable) internal import CollectionsInternal | ||
| #elseif canImport(_RopeModule) | ||
| internal import _RopeModule | ||
| #elseif canImport(_FoundationCollections) | ||
| internal import _FoundationCollections | ||
| #endif | ||
|
|
||
| @available(FoundationPreview 6.2, *) | ||
| extension AttributedString { | ||
| public struct UTF16View: Sendable { | ||
| internal var _guts: Guts | ||
| internal var _range: Range<BigString.Index> | ||
| internal var _identity: Int = 0 | ||
|
|
||
| internal init(_ guts: AttributedString.Guts) { | ||
| self.init(guts, in: guts.stringBounds) | ||
| } | ||
|
|
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| internal init(_ guts: Guts, in range: Range<BigString.Index>) { | ||
| _guts = guts | ||
| _range = range | ||
| } | ||
|
|
||
| public init() { | ||
| self.init(Guts()) | ||
| } | ||
| } | ||
|
|
||
| public var utf16: UTF16View { | ||
| UTF16View(_guts) | ||
| } | ||
| } | ||
|
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| @available(FoundationPreview 6.2, *) | ||
| extension AttributedSubstring { | ||
| public var utf16: AttributedString.UTF16View { | ||
| AttributedString.UTF16View(_guts, in: _range) | ||
| } | ||
| } | ||
|
|
||
| @available(FoundationPreview 6.2, *) | ||
| extension AttributedString.UTF16View { | ||
| var _utf16: BigSubstring.UTF16View { | ||
| BigSubstring.UTF16View(_unchecked: _guts.string, in: _range) | ||
| } | ||
| } | ||
|
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| @available(FoundationPreview 6.2, *) | ||
| extension AttributedString.UTF16View: BidirectionalCollection { | ||
| public typealias Element = UTF16.CodeUnit | ||
| public typealias Index = AttributedString.Index | ||
| public typealias Subsequence = Self | ||
|
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| public var startIndex: AttributedString.Index { | ||
| .init(_range.lowerBound) | ||
| } | ||
|
|
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| public var endIndex: AttributedString.Index { | ||
| .init(_range.upperBound) | ||
| } | ||
|
|
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| public var count: Int { | ||
| _utf16.count | ||
| } | ||
|
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| public func index(before i: AttributedString.Index) -> AttributedString.Index { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| let j = Index(_guts.string.utf16.index(before: i._value)) | ||
| precondition(j >= startIndex, "Can't advance AttributedString index before start index") | ||
| return j | ||
| } | ||
|
|
||
| public func index(after i: AttributedString.Index) -> AttributedString.Index { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| let j = Index(_guts.string.utf16.index(after: i._value)) | ||
| precondition(j <= endIndex, "Can't advance AttributedString index after end index") | ||
| return j | ||
| } | ||
|
|
||
| public func index(_ i: AttributedString.Index, offsetBy distance: Int) -> AttributedString.Index { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| let j = Index(_guts.string.utf16.index(i._value, offsetBy: distance)) | ||
| precondition(j >= startIndex && j <= endIndex, "AttributedString index out of bounds") | ||
| return j | ||
| } | ||
|
|
||
| public func index( | ||
| _ i: AttributedString.Index, | ||
| offsetBy distance: Int, | ||
| limitedBy limit: AttributedString.Index | ||
| ) -> AttributedString.Index? { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| precondition(limit >= startIndex && limit <= endIndex, "AttributedString index out of bounds") | ||
| guard let j = _guts.string.utf16.index( | ||
| i._value, offsetBy: distance, limitedBy: limit._value | ||
| ) else { | ||
| return nil | ||
| } | ||
| precondition(j >= startIndex._value && j <= endIndex._value, | ||
| "AttributedString index out of bounds") | ||
| return Index(j) | ||
| } | ||
|
|
||
| public func distance( | ||
| from start: AttributedString.Index, | ||
| to end: AttributedString.Index | ||
| ) -> Int { | ||
| precondition(start >= startIndex && start <= endIndex, "AttributedString index out of bounds") | ||
| precondition(end >= startIndex && end <= endIndex, "AttributedString index out of bounds") | ||
| return _guts.string.utf16.distance(from: start._value, to: end._value) | ||
| } | ||
|
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| public subscript(index: AttributedString.Index) -> UTF16.CodeUnit { | ||
| precondition(index >= startIndex && index < endIndex, "AttributedString index out of bounds") | ||
| return _guts.string.utf16[index._value] | ||
| } | ||
|
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| public subscript(bounds: Range<AttributedString.Index>) -> Self { | ||
| let bounds = bounds._bstringRange | ||
| precondition( | ||
| bounds.lowerBound >= _range.lowerBound && bounds.lowerBound < _range.upperBound && | ||
| bounds.upperBound >= _range.lowerBound && bounds.upperBound <= _range.upperBound, | ||
| "AttributedString index range out of bounds") | ||
| return Self(_guts, in: bounds) | ||
| } | ||
| } |
139 changes: 139 additions & 0 deletions
139
Sources/FoundationEssentials/AttributedString/AttributedString+UTF8View.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // This source file is part of the Swift.org open source project | ||
| // | ||
| // Copyright (c) 2024 Apple Inc. and the Swift project authors | ||
| // Licensed under Apache License v2.0 with Runtime Library Exception | ||
| // | ||
| // See https://swift.org/LICENSE.txt for license information | ||
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
|
|
||
| #if FOUNDATION_FRAMEWORK | ||
| @_spi(Unstable) internal import CollectionsInternal | ||
| #elseif canImport(_RopeModule) | ||
| internal import _RopeModule | ||
| #elseif canImport(_FoundationCollections) | ||
| internal import _FoundationCollections | ||
| #endif | ||
|
|
||
| @available(FoundationPreview 6.2, *) | ||
| extension AttributedString { | ||
| public struct UTF8View: Sendable { | ||
| internal var _guts: Guts | ||
| internal var _range: Range<BigString.Index> | ||
| internal var _identity: Int = 0 | ||
|
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| internal init(_ guts: AttributedString.Guts) { | ||
| self.init(guts, in: guts.stringBounds) | ||
| } | ||
|
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||
| internal init(_ guts: Guts, in range: Range<BigString.Index>) { | ||
| _guts = guts | ||
| _range = range | ||
| } | ||
|
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||
| public init() { | ||
| self.init(Guts()) | ||
| } | ||
| } | ||
|
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| public var utf8: UTF8View { | ||
| UTF8View(_guts) | ||
| } | ||
| } | ||
|
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| @available(FoundationPreview 6.2, *) | ||
| extension AttributedSubstring { | ||
| public var utf8: AttributedString.UTF8View { | ||
| AttributedString.UTF8View(_guts, in: _range) | ||
| } | ||
| } | ||
|
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| @available(FoundationPreview 6.2, *) | ||
| extension AttributedString.UTF8View { | ||
| var _utf8: BigSubstring.UTF8View { | ||
| BigSubstring.UTF8View(_unchecked: _guts.string, in: _range) | ||
| } | ||
| } | ||
|
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||
| @available(FoundationPreview 6.2, *) | ||
| extension AttributedString.UTF8View: BidirectionalCollection { | ||
| public typealias Element = UTF8.CodeUnit | ||
| public typealias Index = AttributedString.Index | ||
| public typealias Subsequence = Self | ||
|
|
||
| public var startIndex: AttributedString.Index { | ||
| .init(_range.lowerBound) | ||
| } | ||
|
|
||
| public var endIndex: AttributedString.Index { | ||
| .init(_range.upperBound) | ||
| } | ||
|
|
||
| public var count: Int { | ||
| _utf8.count | ||
| } | ||
|
|
||
| public func index(before i: AttributedString.Index) -> AttributedString.Index { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| let j = Index(_guts.string.utf8.index(before: i._value)) | ||
| precondition(j >= startIndex, "Can't advance AttributedString index before start index") | ||
| return j | ||
| } | ||
|
|
||
| public func index(after i: AttributedString.Index) -> AttributedString.Index { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| let j = Index(_guts.string.utf8.index(after: i._value)) | ||
| precondition(j <= endIndex, "Can't advance AttributedString index after end index") | ||
| return j | ||
| } | ||
|
|
||
| public func index(_ i: AttributedString.Index, offsetBy distance: Int) -> AttributedString.Index { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| let j = Index(_guts.string.utf8.index(i._value, offsetBy: distance)) | ||
| precondition(j >= startIndex && j <= endIndex, "AttributedString index out of bounds") | ||
| return j | ||
| } | ||
|
|
||
| public func index( | ||
| _ i: AttributedString.Index, | ||
| offsetBy distance: Int, | ||
| limitedBy limit: AttributedString.Index | ||
| ) -> AttributedString.Index? { | ||
| precondition(i >= startIndex && i <= endIndex, "AttributedString index out of bounds") | ||
| precondition(limit >= startIndex && limit <= endIndex, "AttributedString index out of bounds") | ||
| guard let j = _guts.string.utf8.index( | ||
| i._value, offsetBy: distance, limitedBy: limit._value | ||
| ) else { | ||
| return nil | ||
| } | ||
| precondition(j >= startIndex._value && j <= endIndex._value, | ||
| "AttributedString index out of bounds") | ||
| return Index(j) | ||
| } | ||
|
|
||
| public func distance( | ||
| from start: AttributedString.Index, | ||
| to end: AttributedString.Index | ||
| ) -> Int { | ||
| precondition(start >= startIndex && start <= endIndex, "AttributedString index out of bounds") | ||
| precondition(end >= startIndex && end <= endIndex, "AttributedString index out of bounds") | ||
| return _guts.string.utf8.distance(from: start._value, to: end._value) | ||
| } | ||
|
|
||
| public subscript(index: AttributedString.Index) -> UTF8.CodeUnit { | ||
| precondition(index >= startIndex && index < endIndex, "AttributedString index out of bounds") | ||
| return _guts.string.utf8[index._value] | ||
| } | ||
|
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| public subscript(bounds: Range<AttributedString.Index>) -> Self { | ||
| let bounds = bounds._bstringRange | ||
| precondition( | ||
| bounds.lowerBound >= _range.lowerBound && bounds.lowerBound < _range.upperBound && | ||
| bounds.upperBound >= _range.lowerBound && bounds.upperBound <= _range.upperBound, | ||
| "AttributedString index range out of bounds") | ||
| return Self(_guts, in: bounds) | ||
| } | ||
| } |
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Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters