Function convertOffsetToPosition

server/src/common/positionUtils.ts:18–40

(offset: number, lines: TextRangeCollection<TextRange>)

// Translates a file offset into a line/column pair.
export function convertOffsetToPosition(offset: number, lines: TextRangeCollection<TextRange>): DiagnosticTextPosition {
    // Handle the case where the file is empty.
    if (lines.end === 0) {
        return {
            line: 0,
            column: 0
        };
    }

    // Handle the case where we're pointing to the last line of the file.
    if (offset >= lines.end) {
        offset = lines.end - 1;
    }

    let itemIndex = lines.getItemContaining(offset);
    assert(itemIndex >= 0 && itemIndex <= lines.length);
    let lineRange = lines.getItemAt(itemIndex);
    assert(lineRange !== undefined);
    return {
        line: itemIndex,
        column: offset - lineRange.start
    };
}

// Translates a start/end file offset into a pair of line/column positions.
export function convertOffsetsToRange(startOffset: number, endOffset: number,