@atlaskit/editor-plugin-show-diff/dist/esm/pm-plugins/decorations/utils/getMarkChangeRanges.js

ShowDiff plugin for @atlaskit/editor-core

function _createForOfIteratorHelper(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (!t) { if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var _n = 0, F = function F() {}; return { s: F, n: function n() { return _n >= r.length ? { done: !0 } : { done: !1, value: r[_n++] }; }, e: function e(r) { throw r; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var o, a = !0, u = !1; return { s: function s() { t = t.call(r); }, n: function n() { var r = t.next(); return a = r.done, r; }, e: function e(r) { u = !0, o = r; }, f: function f() { try { a || null == t.return || t.return(); } finally { if (u) throw o; } } }; }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
import { AddMarkStep, RemoveMarkStep } from '@atlaskit/editor-prosemirror/transform';
var extractMarkStep = function extractMarkStep(step) {
  if (step instanceof AddMarkStep) {
    return {
      type: 'add',
      from: step.from,
      to: step.to,
      markName: step.mark.type.name
    };
  }
  if (step instanceof RemoveMarkStep) {
    return {
      type: 'remove',
      from: step.from,
      to: step.to,
      markName: step.mark.type.name
    };
  }
  return undefined;
};
export var getMarkChangeRanges = function getMarkChangeRanges(steps) {
  var resultRanges = [];
  var lastOp;
  var _iterator = _createForOfIteratorHelper(steps),
    _step;
  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var step = _step.value;
      var op = extractMarkStep(step);
      if (!op) {
        continue;
      }

      // Check if previous operation cancels this one
      if (lastOp && lastOp.from === op.from && lastOp.to === op.to && lastOp.markName === op.markName && lastOp.type !== op.type) {
        resultRanges.pop();
      } else {
        resultRanges.push({
          fromB: op.from,
          toB: op.to
        });
      }
      lastOp = op;
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }
  return resultRanges;
};