@graffy/common/decorate/pageInfo.js

Common libraries that used by various Graffy modules.

"use strict";

exports.__esModule = true;
exports["default"] = pageInfo;

var _node = require("../node");

function pageInfo(graph) {
  if (!graph || !graph.length) return {};
  var start = graph[0].key;
  var lastNode = graph[graph.length - 1];
  var end = (0, _node.isRange)(lastNode) ? lastNode.end : lastNode.key;
  return {
    start: start,
    end: end,
    hasPrev: start !== '',
    hasNext: end !== "\uFFFF"
  };
}

module.exports = exports.default;