simple-text-buffer/lib/helpers.js

A version of Atom's text-buffer with marker layers and file support removed

(function() {
  var Point, SpliceArrayChunkSize,
    slice = [].slice;

  Point = require('./point');

  SpliceArrayChunkSize = 100000;

  module.exports = {
    spliceArray: function(originalArray, start, length, insertedArray) {
      var chunk, chunkEnd, chunkStart, i, ref, ref1, removedValues;
      if (insertedArray == null) {
        insertedArray = [];
      }
      if (insertedArray.length < SpliceArrayChunkSize) {
        return originalArray.splice.apply(originalArray, [start, length].concat(slice.call(insertedArray)));
      } else {
        removedValues = originalArray.splice(start, length);
        for (chunkStart = i = 0, ref = insertedArray.length, ref1 = SpliceArrayChunkSize; ref1 > 0 ? i <= ref : i >= ref; chunkStart = i += ref1) {
          chunkEnd = chunkStart + SpliceArrayChunkSize;
          chunk = insertedArray.slice(chunkStart, chunkEnd);
          originalArray.splice.apply(originalArray, [start + chunkStart, 0].concat(slice.call(chunk)));
        }
        return removedValues;
      }
    },
    newlineRegex: /\r\n|\n|\r/g,
    normalizePatchChanges: function(changes) {
      return changes.map(function(change) {
        return {
          start: Point.fromObject(change.newStart),
          oldExtent: Point.fromObject(change.oldExtent),
          newExtent: Point.fromObject(change.newExtent),
          newText: change.newText
        };
      });
    }
  };

}).call(this);