primereact/components/datascroller/DataScroller.js

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"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.DataScroller = void 0;

var _react = _interopRequireWildcard(require("react"));

var _propTypes = _interopRequireDefault(require("prop-types"));

var _ClassNames = require("../utils/ClassNames");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var DataScroller = /*#__PURE__*/function (_Component) {
  _inherits(DataScroller, _Component);

  var _super = _createSuper(DataScroller);

  function DataScroller(props) {
    var _this;

    _classCallCheck(this, DataScroller);

    _this = _super.call(this, props);
    _this.state = {};
    _this.dataToRender = [];
    _this.value = _this.props.value;
    _this.first = 0;
    return _this;
  }

  _createClass(DataScroller, [{
    key: "handleDataChange",
    value: function handleDataChange() {
      if (this.props.lazy) {
        this.dataToRender = this.value;
        this.setState({
          dataToRender: this.dataToRender
        });
      } else {
        this.load();
      }
    }
  }, {
    key: "load",
    value: function load() {
      if (this.props.lazy) {
        if (this.props.onLazyLoad) {
          this.props.onLazyLoad(this.createLazyLoadMetadata());
        }

        this.first = this.first + this.props.rows;
      } else {
        if (this.value) {
          for (var i = this.first; i < this.first + this.props.rows; i++) {
            if (i >= this.value.length) {
              break;
            }

            this.dataToRender.push(this.value[i]);
          }

          this.first = this.first + this.props.rows;
          this.setState({
            dataToRender: this.dataToRender
          });
        }
      }
    }
  }, {
    key: "reset",
    value: function reset() {
      this.first = 0;
      this.dataToRender = [];
      this.setState({
        dataToRender: this.dataToRender
      });
      this.load();
    }
  }, {
    key: "isEmpty",
    value: function isEmpty() {
      return !this.dataToRender || this.dataToRender.length === 0;
    }
  }, {
    key: "createLazyLoadMetadata",
    value: function createLazyLoadMetadata() {
      return {
        first: this.first,
        rows: this.props.rows
      };
    }
  }, {
    key: "bindScrollListener",
    value: function bindScrollListener() {
      var _this2 = this;

      if (this.props.inline) {
        this.scrollFunction = function () {
          var scrollTop = _this2.contentElement.scrollTop,
              scrollHeight = _this2.contentElement.scrollHeight,
              viewportHeight = _this2.contentElement.clientHeight;

          if (scrollTop >= scrollHeight * _this2.props.buffer - viewportHeight) {
            _this2.load();
          }
        };

        this.contentElement.addEventListener('scroll', this.scrollFunction);
      } else {
        this.scrollFunction = function () {
          var docBody = document.body,
              docElement = document.documentElement,
              scrollTop = window.pageYOffset || document.documentElement.scrollTop,
              winHeight = docElement.clientHeight,
              docHeight = Math.max(docBody.scrollHeight, docBody.offsetHeight, winHeight, docElement.scrollHeight, docElement.offsetHeight);

          if (scrollTop >= docHeight * _this2.props.buffer - winHeight) {
            _this2.load();
          }
        };

        window.addEventListener('scroll', this.scrollFunction);
      }
    }
  }, {
    key: "unbindScrollListener",
    value: function unbindScrollListener() {
      if (this.scrollFunction) {
        if (this.props.inline) {
          this.contentElement.removeEventListener('scroll', this.scrollFunction);
          this.contentElement = null;
        } else if (!this.props.loader) {
          window.removeEventListener('scroll', this.scrollFunction);
        }
      }

      this.scrollFunction = null;
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      this.load();

      if (!this.props.loader) {
        this.bindScrollListener();
      }
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate(prevProps, prevState) {
      var newValue = this.props.value;

      if (newValue && this.value !== newValue) {
        this.value = newValue;
        this.handleDataChange();
      }

      if (prevProps.loader !== this.props.loader && this.props.loader) {
        this.unbindScrollListener();
      }
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      if (this.scrollFunction) {
        this.unbindScrollListener();
      }
    }
  }, {
    key: "render",
    value: function render() {
      var _this3 = this;

      var className = (0, _ClassNames.classNames)('p-datascroller p-component', this.props.className, {
        'p-datascroller-inline': this.props.inline
      });

      var header = this.props.header && /*#__PURE__*/_react.default.createElement("div", {
        className: "p-datascroller-header"
      }, " ", this.props.header),
          footer = this.props.footer && /*#__PURE__*/_react.default.createElement("div", {
        className: "p-datascroller-footer"
      }, " ", this.props.footer, " "),
          content = /*#__PURE__*/_react.default.createElement("div", {
        ref: function ref(el) {
          return _this3.contentElement = el;
        },
        className: "p-datascroller-content",
        style: {
          'maxHeight': this.props.scrollHeight
        }
      }, /*#__PURE__*/_react.default.createElement("ul", {
        className: "p-datascroller-list"
      }, this.state.dataToRender && this.state.dataToRender.map(function (val, i) {
        var listItemContent = _this3.props.itemTemplate ? _this3.props.itemTemplate(val) : val;
        return /*#__PURE__*/_react.default.createElement("li", {
          key: i + '_datascrollitem'
        }, listItemContent);
      })));

      return /*#__PURE__*/_react.default.createElement("div", {
        id: this.props.id,
        className: className
      }, header, content, footer);
    }
  }]);

  return DataScroller;
}(_react.Component);

exports.DataScroller = DataScroller;

_defineProperty(DataScroller, "defaultProps", {
  id: null,
  value: null,
  rows: 0,
  inline: false,
  scrollHeight: null,
  loader: false,
  buffer: 0.9,
  style: null,
  className: null,
  onLazyLoad: null,
  itemTemplate: null,
  header: null,
  footer: null,
  lazy: false
});

_defineProperty(DataScroller, "propTypes", {
  id: _propTypes.default.string,
  value: _propTypes.default.array,
  rows: _propTypes.default.number,
  inline: _propTypes.default.bool,
  scrollHeight: _propTypes.default.any,
  loader: _propTypes.default.bool,
  buffer: _propTypes.default.number,
  style: _propTypes.default.object,
  className: _propTypes.default.string,
  onLazyLoad: _propTypes.default.func,
  itemTemplate: _propTypes.default.func,
  header: _propTypes.default.any,
  footer: _propTypes.default.any,
  lazy: _propTypes.default.bool
});