choerodon-ui/es/rc-components/slider/Range.js

An enterprise-class UI design language and React-based implementation

import _toConsumableArray from "@babel/runtime/helpers/toConsumableArray";
import _objectSpread from "@babel/runtime/helpers/objectSpread2";
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _assertThisInitialized from "@babel/runtime/helpers/assertThisInitialized";
import _inherits from "@babel/runtime/helpers/inherits";
import _createSuper from "@babel/runtime/helpers/createSuper";
import _defineProperty from "@babel/runtime/helpers/defineProperty";

/* eslint-disable react/prop-types */
import React, { Component } from 'react';
import classNames from 'classnames';
import shallowEqual from 'shallowequal';
import Track from './common/Track';
import createSlider from './common/createSlider';
import * as utils from './utils';

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

  var _super = _createSuper(Range);

  function Range(props) {
    var _this;

    _classCallCheck(this, Range);

    _this = _super.call(this, props);

    _defineProperty(_assertThisInitialized(_this), "onEnd", function () {
      _this.removeDocumentEvents();

      _this.props.onAfterChange(_this.getValue());

      _this.setState({
        handle: undefined
      });
    });

    var count = props.count,
        min = props.min,
        max = props.max;
    var initialValue = Array.apply(null, Array(count + 1)).map(function () {
      return min;
    });
    var defaultValue = 'defaultValue' in props ? props.defaultValue : initialValue;
    var value = props.value !== undefined ? props.value : defaultValue;
    var bounds = value.map(function (v, i) {
      return _this.trimAlignValue(v, i);
    });
    var recent = bounds[0] === max ? 0 : bounds.length - 1;
    _this.state = {
      handle: null,
      recent: recent,
      bounds: bounds
    };
    return _this;
  }

  _createClass(Range, [{
    key: "componentWillReceiveProps",
    value: function componentWillReceiveProps(nextProps) {
      var _this2 = this;

      if (!('value' in nextProps || 'min' in nextProps || 'max' in nextProps)) return;

      if (this.props.min === nextProps.min && this.props.max === nextProps.max && shallowEqual(this.props.value, nextProps.value)) {
        return;
      }

      var bounds = this.state.bounds;
      var value = nextProps.value || bounds;
      var nextBounds = value.map(function (v, i) {
        return _this2.trimAlignValue(v, i, nextProps);
      });
      if (nextBounds.length === bounds.length && nextBounds.every(function (v, i) {
        return v === bounds[i];
      })) return;
      this.setState({
        bounds: nextBounds
      });

      if (bounds.some(function (v) {
        return utils.isValueOutOfRange(v, nextProps);
      })) {
        var newValues = value.map(function (v) {
          return utils.ensureValueInRange(v, nextProps);
        });
        this.props.onChange(newValues);
      }
    }
  }, {
    key: "onChange",
    value: function onChange(state) {
      var props = this.props;
      var isNotControlled = !('value' in props);

      if (isNotControlled) {
        this.setState(state);
      } else if (state.handle !== undefined) {
        this.setState({
          handle: state.handle
        });
      }

      var data = _objectSpread(_objectSpread({}, this.state), state);

      var changedValue = data.bounds;
      props.onChange(changedValue);
    }
  }, {
    key: "onStart",
    value: function onStart(position) {
      var props = this.props;
      var state = this.state;
      var bounds = this.getValue();
      props.onBeforeChange(bounds);
      var value = this.calcValueByPos(position);
      this.startValue = value;
      this.startPosition = position;
      var closestBound = this.getClosestBound(value);
      this.prevMovedHandleIndex = this.getBoundNeedMoving(value, closestBound);
      this.setState({
        handle: this.prevMovedHandleIndex,
        recent: this.prevMovedHandleIndex
      });
      var prevValue = bounds[this.prevMovedHandleIndex];
      if (value === prevValue) return;

      var nextBounds = _toConsumableArray(state.bounds);

      nextBounds[this.prevMovedHandleIndex] = value;
      this.onChange({
        bounds: nextBounds
      });
    }
  }, {
    key: "onMove",
    value: function onMove(e, position) {
      utils.pauseEvent(e);
      var state = this.state;
      var value = this.calcValueByPos(position);
      var oldValue = state.bounds[state.handle];
      if (value === oldValue) return;
      this.moveTo(value);
    }
  }, {
    key: "onKeyboard",
    value: function onKeyboard(e) {
      var valueMutator = utils.getKeyboardValueMutator(e);

      if (valueMutator) {
        utils.pauseEvent(e);
        var state = this.state,
            props = this.props;
        var bounds = state.bounds,
            handle = state.handle;
        var oldValue = bounds[handle];
        var mutatedValue = valueMutator(oldValue, props);
        var value = this.trimAlignValue(mutatedValue);
        if (value === oldValue) return;
        var isFromKeyboardEvent = true;
        this.moveTo(value, isFromKeyboardEvent);
      }
    }
  }, {
    key: "getValue",
    value: function getValue() {
      return this.state.bounds;
    }
  }, {
    key: "getClosestBound",
    value: function getClosestBound(value) {
      var bounds = this.state.bounds;
      var closestBound = 0;

      for (var i = 1; i < bounds.length - 1; ++i) {
        if (value > bounds[i]) {
          closestBound = i;
        }
      }

      if (Math.abs(bounds[closestBound + 1] - value) < Math.abs(bounds[closestBound] - value)) {
        closestBound = closestBound + 1;
      }

      return closestBound;
    }
  }, {
    key: "getBoundNeedMoving",
    value: function getBoundNeedMoving(value, closestBound) {
      var _this$state = this.state,
          bounds = _this$state.bounds,
          recent = _this$state.recent;
      var boundNeedMoving = closestBound;
      var isAtTheSamePoint = bounds[closestBound + 1] === bounds[closestBound];

      if (isAtTheSamePoint && bounds[recent] === bounds[closestBound]) {
        boundNeedMoving = recent;
      }

      if (isAtTheSamePoint && value !== bounds[closestBound + 1]) {
        boundNeedMoving = value < bounds[closestBound + 1] ? closestBound : closestBound + 1;
      }

      return boundNeedMoving;
    }
  }, {
    key: "getLowerBound",
    value: function getLowerBound() {
      return this.state.bounds[0];
    }
  }, {
    key: "getUpperBound",
    value: function getUpperBound() {
      var bounds = this.state.bounds;
      return bounds[bounds.length - 1];
    }
    /**
     * Returns an array of possible slider points, taking into account both
     * `marks` and `step`. The result is cached.
     */

  }, {
    key: "getPoints",
    value: function getPoints() {
      var _this$props = this.props,
          marks = _this$props.marks,
          step = _this$props.step,
          min = _this$props.min,
          max = _this$props.max;
      var cache = this._getPointsCache;

      if (!cache || cache.marks !== marks || cache.step !== step) {
        var pointsObject = _objectSpread({}, marks);

        if (step !== null) {
          for (var point = min; point <= max; point += step) {
            pointsObject[point] = point;
          }
        }

        var points = Object.keys(pointsObject).map(parseFloat);
        points.sort(function (a, b) {
          return a - b;
        });
        this._getPointsCache = {
          marks: marks,
          step: step,
          points: points
        };
      }

      return this._getPointsCache.points;
    }
  }, {
    key: "moveTo",
    value: function moveTo(value, isFromKeyboardEvent) {
      var _this3 = this;

      var state = this.state,
          props = this.props;

      var nextBounds = _toConsumableArray(state.bounds);

      nextBounds[state.handle] = value;
      var nextHandle = state.handle;

      if (props.pushable !== false) {
        this.pushSurroundingHandles(nextBounds, nextHandle);
      } else if (props.allowCross) {
        nextBounds.sort(function (a, b) {
          return a - b;
        });
        nextHandle = nextBounds.indexOf(value);
      }

      this.onChange({
        handle: nextHandle,
        bounds: nextBounds
      });

      if (isFromKeyboardEvent) {
        // known problem: because setState is async,
        // so trigger focus will invoke handler's onEnd and another handler's onStart too early,
        // cause onBeforeChange and onAfterChange receive wrong value.
        // here use setState callback to hack，but not elegant
        this.setState({}, function () {
          _this3.handlesRefs[nextHandle].focus();
        });
      }
    }
  }, {
    key: "pushSurroundingHandles",
    value: function pushSurroundingHandles(bounds, handle) {
      var value = bounds[handle];
      var threshold = this.props.pushable;
      threshold = Number(threshold);
      var direction = 0;

      if (bounds[handle + 1] - value < threshold) {
        direction = +1; // push to right
      }

      if (value - bounds[handle - 1] < threshold) {
        direction = -1; // push to left
      }

      if (direction === 0) {
        return;
      }

      var nextHandle = handle + direction;
      var diffToNext = direction * (bounds[nextHandle] - value);

      if (!this.pushHandle(bounds, nextHandle, direction, threshold - diffToNext)) {
        // revert to original value if pushing is impossible
        bounds[handle] = bounds[nextHandle] - direction * threshold;
      }
    }
  }, {
    key: "pushHandle",
    value: function pushHandle(bounds, handle, direction, amount) {
      var originalValue = bounds[handle];
      var currentValue = bounds[handle];

      while (direction * (currentValue - originalValue) < amount) {
        if (!this.pushHandleOnePoint(bounds, handle, direction)) {
          // can't push handle enough to create the needed `amount` gap, so we
          // revert its position to the original value
          bounds[handle] = originalValue;
          return false;
        }

        currentValue = bounds[handle];
      } // the handle was pushed enough to create the needed `amount` gap


      return true;
    }
  }, {
    key: "pushHandleOnePoint",
    value: function pushHandleOnePoint(bounds, handle, direction) {
      var points = this.getPoints();
      var pointIndex = points.indexOf(bounds[handle]);
      var nextPointIndex = pointIndex + direction;

      if (nextPointIndex >= points.length || nextPointIndex < 0) {
        // reached the minimum or maximum available point, can't push anymore
        return false;
      }

      var nextHandle = handle + direction;
      var nextValue = points[nextPointIndex];
      var threshold = this.props.pushable;
      var diffToNext = direction * (bounds[nextHandle] - nextValue);

      if (!this.pushHandle(bounds, nextHandle, direction, threshold - diffToNext)) {
        // couldn't push next handle, so we won't push this one either
        return false;
      } // push the handle


      bounds[handle] = nextValue;
      return true;
    }
  }, {
    key: "trimAlignValue",
    value: function trimAlignValue(v, handle) {
      var nextProps = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

      var mergedProps = _objectSpread(_objectSpread({}, this.props), nextProps);

      var valInRange = utils.ensureValueInRange(v, mergedProps);
      var valNotConflict = this.ensureValueNotConflict(handle, valInRange, mergedProps);
      return utils.ensureValuePrecision(valNotConflict, mergedProps);
    }
  }, {
    key: "ensureValueNotConflict",
    value: function ensureValueNotConflict(handle, val, _ref) {
      var allowCross = _ref.allowCross,
          thershold = _ref.pushable;
      var state = this.state || {};
      var bounds = state.bounds;
      handle = handle === undefined ? state.handle : handle;
      thershold = Number(thershold);
      /* eslint-disable eqeqeq */

      if (!allowCross && handle != null && bounds !== undefined) {
        if (handle > 0 && val <= bounds[handle - 1] + thershold) {
          return bounds[handle - 1] + thershold;
        }

        if (handle < bounds.length - 1 && val >= bounds[handle + 1] - thershold) {
          return bounds[handle + 1] - thershold;
        }
      }
      /* eslint-enable eqeqeq */


      return val;
    }
  }, {
    key: "render",
    value: function render() {
      var _this4 = this;

      var _this$state2 = this.state,
          handle = _this$state2.handle,
          bounds = _this$state2.bounds;
      var _this$props2 = this.props,
          prefixCls = _this$props2.prefixCls,
          vertical = _this$props2.vertical,
          included = _this$props2.included,
          disabled = _this$props2.disabled,
          min = _this$props2.min,
          max = _this$props2.max,
          handleGenerator = _this$props2.handle,
          trackStyle = _this$props2.trackStyle,
          handleStyle = _this$props2.handleStyle,
          tabIndex = _this$props2.tabIndex;
      var offsets = bounds.map(function (v) {
        return _this4.calcOffset(v);
      });
      var handleClassName = "".concat(prefixCls, "-handle");
      var handles = bounds.map(function (v, i) {
        var _classNames;

        return handleGenerator({
          className: classNames((_classNames = {}, _defineProperty(_classNames, handleClassName, true), _defineProperty(_classNames, "".concat(handleClassName, "-").concat(i + 1), true), _classNames)),
          prefixCls: prefixCls,
          vertical: vertical,
          offset: offsets[i],
          value: v,
          dragging: handle === i,
          index: i,
          tabIndex: tabIndex[i] || 0,
          min: min,
          max: max,
          disabled: disabled,
          style: handleStyle[i],
          ref: function ref(h) {
            return _this4.saveHandle(i, h);
          }
        });
      });
      var tracks = bounds.slice(0, -1).map(function (_, index) {
        var _classNames2;

        var i = index + 1;
        var trackClassName = classNames((_classNames2 = {}, _defineProperty(_classNames2, "".concat(prefixCls, "-track"), true), _defineProperty(_classNames2, "".concat(prefixCls, "-track-").concat(i), true), _classNames2));
        return /*#__PURE__*/React.createElement(Track, {
          className: trackClassName,
          vertical: vertical,
          included: included,
          offset: offsets[i - 1],
          length: offsets[i] - offsets[i - 1],
          style: trackStyle[index],
          key: i
        });
      });
      return {
        tracks: tracks,
        handles: handles
      };
    }
  }]);

  return Range;
}(Component);

_defineProperty(Range, "displayName", 'Range');

_defineProperty(Range, "defaultProps", {
  count: 1,
  allowCross: true,
  pushable: false,
  tabIndex: []
});

export default createSlider(Range);
//# sourceMappingURL=Range.js.map