hippy-ui/lib/components/Slider/index.js

> hippy-react ui components for hippy2.0

"use strict";

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

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

var _react2 = require("@hippy/react");

var _Panel = _interopRequireDefault(require("./Panel"));

var _props = require("./props");

var _utils = require("../../utils");

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

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); }

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; }

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

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

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

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); }

var styles = _react2.StyleSheet.create({
  container: {}
});

var Slider =
/*#__PURE__*/
function (_React$Component) {
  _inherits(Slider, _React$Component);

  function Slider(props) {
    var _this;

    _classCallCheck(this, Slider);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(Slider).call(this, props));
    var horizontal = _this.props.horizontal;
    _this.axis = horizontal ? 'x' : 'y';
    _this.panelRefs = {};
    _this.onScroll = _this.onScroll.bind(_assertThisInitialized(_this));
    _this.scrollTo = _this.scrollTo.bind(_assertThisInitialized(_this));
    return _this;
  }

  _createClass(Slider, [{
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      this.clearScrollBuffer();
    }
  }, {
    key: "clearScrollBuffer",
    value: function clearScrollBuffer() {
      if (this.scrollBuffer) {
        clearTimeout(this.scrollBuffer);
      }
    }
  }, {
    key: "getClosestPanel",
    value: function getClosestPanel() {
      var _this2 = this;

      var distance = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
      var minDist = 9999999;
      var index = -1;
      var location = -1;
      Object.keys(this.panelRefs).forEach(function (key, ind) {
        var panelLayout = _this2.panelRefs[key].panelLayout;
        var currentDist = panelLayout[_this2.axis];
        var absDist = Math.abs(currentDist - distance);

        if (absDist < minDist) {
          minDist = absDist;
          index = ind;
          location = currentDist;
        }
      });
      return {
        index: index,
        location: location
      };
    }
  }, {
    key: "scrollTo",
    value: function scrollTo(value) {
      var x = this.axis === 'x' ? value : 0;
      var y = this.axis === 'y' ? value : 0;

      if (this.scrollerRef) {
        _utils.ISWEB ? this.scrollerRef.scrollTo(x, y, true) : this.scrollerRef.scrollTo({
          x: x,
          y: y,
          animated: true
        });
      }
    }
  }, {
    key: "scrollToIndex",
    value: function scrollToIndex(index) {
      var selectedPanel = this.panelRefs["".concat(index)];
      if (!selectedPanel) return;
      var panelLayout = selectedPanel.panelLayout;
      var currentDist = panelLayout[this.axis];
      this.scrollTo(currentDist);
    } // web 需要优化，不需要每次都执行操作，看看速度是否为0

  }, {
    key: "onScroll",
    value: function onScroll(e) {
      var _this3 = this;

      var distance = e.contentOffset[this.axis];
      this.clearScrollBuffer();
      this.scrollBuffer = setTimeout(function () {
        _this3.clearScrollBuffer();

        var _this3$getClosestPane = _this3.getClosestPanel(distance),
            location = _this3$getClosestPane.location,
            index = _this3$getClosestPane.index;

        if (index !== -1) {
          _this3.scrollTo(location);
        }
      }, 180);
    }
  }, {
    key: "getPanelStyle",
    value: function getPanelStyle(index) {
      var _this$props = this.props,
          cellSpacing = _this$props.cellSpacing,
          slideWidth = _this$props.slideWidth,
          children = _this$props.children,
          horizontal = _this$props.horizontal;

      var count = _react.default.Children.count(children);

      var marginName = horizontal ? 'marginRight' : 'marginBottom';

      var style = _defineProperty({}, marginName, count !== index + 1 ? cellSpacing : 0);

      if (this.props.hasOwnProperty('slideWidth')) style.width = slideWidth;
      return style;
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      var selectedIndex = this.props.selectedIndex;
      this.scrollToIndex(selectedIndex);
    }
  }, {
    key: "render",
    value: function render() {
      var _this4 = this;

      var _this$props2 = this.props,
          children = _this$props2.children,
          horizontal = _this$props2.horizontal,
          style = _this$props2.style,
          contentContainerStyle = _this$props2.contentContainerStyle;
      return (
        /*#__PURE__*/
        _react.default.createElement(_react2.ScrollView, {
          horizontal: horizontal,
          style: (0, _utils.flattenStyle)([styles.container, (0, _utils.flattenStyle)(style)]),
          contentContainerStyle: (0, _utils.flattenStyle)(contentContainerStyle),
          onScroll: this.onScroll,
          ref: function ref(el) {
            return _this4.scrollerRef = el;
          },
          scrollEventThrottle: 32,
          pagingEnabled: true
        }, _react.default.Children.map(children, function (child, index) {
          return (
            /*#__PURE__*/
            _react.default.createElement(_Panel.default, {
              style: _this4.getPanelStyle(index),
              ref: function ref(_ref) {
                return _this4.panelRefs[index] = _ref;
              }
            }, child)
          );
        }))
      );
    }
  }]);

  return Slider;
}(_react.default.Component);

exports.Slider = Slider;
Slider.propTypes = _props.Props;
Slider.defaultProps = _props.DefaultProps;
var _default = Slider;
exports.default = _default;