move-lines

Move around lines in a string.

Install

$ npm install --save move-lines

Usage

const moveLines = require('move-lines');

const input = ['a', 'b', 'c', 'd'].join('\n');

// move 2nd line down 1
moveLines(input, {startLine: 1, endLine: 1, move: 1});
//=> ['a', 'c', 'b', 'd'].join('\n');

// move 2nd and 3rd lines up 1
moveLines(input, {startLine: 1, endLine: 2, move: -1});
//=> ['b', 'c', 'a', 'd'].join('\n');

// You can also reposition string position indexes
const result = moveLines.withPositions(
  input,
  {startLine: 0, endLine:1, move: 1},
  {selectionStart: 0, selectionEnd: 3, foo: 7}
);

result.positions;
//=> {selectionStart: 2, selectionEnd: 5, foo: 7}

API

moveLines(input, options)

Moves lines of input around according to options, returns the resulting string.

input

Type: string

A string containing lines you want moved around

options

startLine

Type: number

The starting line to be moved. Zero based. Inclusive.

endLine

Type: number

The ending line to be moved. Zero based. Inclusive.

move

Type: number

How many lines to move. Negative numbers move lines up. Positive numbers move lines down.

moveLines.withPositions(input, options, positions)

Same as moveLines(), but it takes a hash of positions (all of which must be numbers).

The returned Object has two properties:

• result: A string with the modified
• positions: Will have all the same properties as the positions input, but the indexes will be adjusted according to the move.

License

MIT © James Talmage