mirror of
https://github.com/apple/sourcekit-lsp.git
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d0fc00ce98
Add `.swift-format` to the repo and format the repo with `swift-format`. This commit does not add any automation to enforce formatting of sourcekit-lsp in CI. The goal of this commit is to get the majority of source changes out of the way so that the diff of actually enforcing formatting will have fewer changes or conflicts.
72 lines
2.7 KiB
Swift
72 lines
2.7 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2022 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import LanguageServerProtocol
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/// Given an edit event, the `RangeAdjuster` can adjust ranges in the pre-edit
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/// document to the corresponding ranges in the post-edit document
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struct RangeAdjuster {
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/// The edit that ranges should be adjusted for
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let editRange: Range<Position>
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/// Number of lines that ranges after the `editRange` should be moved down (or up if negative).
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let lineDelta: Int
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/// Number of UTF-16 indicies that ranges, which are on the last line of `editRange` but after the UTF-16 column of `editRange` should be shifted to the right (or left if negative).
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let lastLineCharDelta: Int
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init?(edit: TextDocumentContentChangeEvent) {
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guard let editRange = edit.range else {
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return nil
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}
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self.editRange = editRange
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let replacedLineCount = 1 + editRange.upperBound.line - editRange.lowerBound.line
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let newLines = edit.text.split(separator: "\n", omittingEmptySubsequences: false)
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let upperUtf16IndexAfterEdit =
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(newLines.count == 1 ? editRange.lowerBound.utf16index : 0) + newLines.last!.utf16.count
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self.lastLineCharDelta = upperUtf16IndexAfterEdit - editRange.upperBound.utf16index
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self.lineDelta = newLines.count - replacedLineCount // may be negative
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}
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/// Adjust the pre-edit `range` to the corresponding range in the post-edit document.
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/// If the range overlaps with the edit, returns `nil`.
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func adjust(_ range: Range<Position>) -> Range<Position>? {
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if range.overlaps(editRange) {
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return nil
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}
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let lineOffset: Int
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let charOffset: Int
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if range.lowerBound.line == editRange.upperBound.line,
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range.lowerBound.utf16index >= editRange.upperBound.utf16index
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{
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lineOffset = lineDelta
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charOffset = lastLineCharDelta
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} else if range.lowerBound.line > editRange.upperBound.line {
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lineOffset = lineDelta
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charOffset = 0
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} else {
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lineOffset = 0
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charOffset = 0
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}
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let newStart = Position(
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line: range.lowerBound.line + lineOffset,
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utf16index: range.lowerBound.utf16index + charOffset
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)
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let newEnd = Position(
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line: range.upperBound.line + lineOffset,
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utf16index: range.upperBound.utf16index + charOffset
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)
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return newStart..<newEnd
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}
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}
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