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API: convert row/column to offset #138

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merged 4 commits into from
Aug 2, 2022
Merged

API: convert row/column to offset #138

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941f81a
Fix #137. convert row/column to offset
rebornix Aug 1, 2022
f487685
:lipstick:
rebornix Aug 1, 2022
7240528
Renames textLocation(at:) to location(at:)
simonbs Aug 2, 2022
bb63cfe
Updates documentation of location(at:)
simonbs Aug 2, 2022
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15 changes: 15 additions & 0 deletions Sources/Runestone/TextView/TextView.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -721,6 +721,21 @@ open class TextView: UIScrollView {
}
}

/// Returns the character location at the specified row and column.
/// - Parameter textLocation: The row and column in the text.
/// - Returns: The location if the input row and column could be found in the text, otherwise nil.
public func location(at textLocation: TextLocation) -> Int? {
let lineIndex = textLocation.lineNumber
guard lineIndex >= 0 && lineIndex < textInputView.lineManager.lineCount else {
return nil
}
let line = textInputView.lineManager.line(atRow: lineIndex)
guard textLocation.column >= 0 && textLocation.column <= line.data.totalLength else {
return nil
}
return line.location + textLocation.column
}

/// Sets the language mode on a background thread.
///
/// - Parameters:
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