box-ui-elements
Version:
Box UI Elements
208 lines (201 loc) • 7.94 kB
JavaScript
const _excluded = ["className"];
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _objectWithoutProperties(e, t) { if (null == e) return {}; var o, r, i = _objectWithoutPropertiesLoose(e, t); if (Object.getOwnPropertySymbols) { var n = Object.getOwnPropertySymbols(e); for (r = 0; r < n.length; r++) o = n[r], -1 === t.indexOf(o) && {}.propertyIsEnumerable.call(e, o) && (i[o] = e[o]); } return i; }
function _objectWithoutPropertiesLoose(r, e) { if (null == r) return {}; var t = {}; for (var n in r) if ({}.hasOwnProperty.call(r, n)) { if (-1 !== e.indexOf(n)) continue; t[n] = r[n]; } return t; }
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
/**
*
* @file HOC for drag drop
* @author Box
*/
import React, { PureComponent } from 'react';
import classNames from 'classnames';
/* eslint-disable no-plusplus */
const makeDroppable = ({
dropValidator,
onDrop
}) => Wrapped => {
var _DroppableComponent;
return _DroppableComponent = class DroppableComponent extends PureComponent {
/**
* [constructor]
*
* @param {*} props
* @return {DroppableComponent}
*/
constructor(props) {
super(props);
/**
* Ref callback to store the DOM element reference
* @param {Element | null} element - The DOM element or null
*/
_defineProperty(this, "setDroppableRef", element => {
this.removeEventListeners(this.droppableEl);
this.droppableEl = element;
this.bindDragDropHandlers(element);
});
/**
* Function that binds drag and drop related event listeners to the input element
* @param {Element | null} element - The DOM element to attach listeners to
*/
_defineProperty(this, "bindDragDropHandlers", element => {
if (!element) {
return;
}
element.addEventListener('dragenter', this.handleDragEnter);
element.addEventListener('dragover', this.handleDragOver);
element.addEventListener('dragleave', this.handleDragLeave);
element.addEventListener('drop', this.handleDrop);
});
/**
* Function that removes the drag and drop related event listeners on the input element
* @param {Element | null} element - The DOM element to remove listeners from
*/
_defineProperty(this, "removeEventListeners", element => {
if (!element) {
return;
}
element.removeEventListener('dragenter', this.handleDragEnter);
element.removeEventListener('dragover', this.handleDragOver);
element.removeEventListener('dragleave', this.handleDragLeave);
element.removeEventListener('drop', this.handleDrop);
});
/**
* Function that gets called when an item is dragged into the drop zone
*
* @param {SyntheticEvent} event - The dragenter event
* @return {void}
*/
_defineProperty(this, "handleDragEnter", event => {
// This allows onDrop to be fired
event.preventDefault();
// Use this to track the number of drag enters and leaves.
// This is used to normalize enters/leaves between parent/child elements
// we only want to do things in dragenter when the counter === 1
if (++this.enterLeaveCounter === 1) {
const {
dataTransfer
} = event;
// if we don't have a dropValidator, we just default canDrop to true
const canDrop = dropValidator ? dropValidator(this.props, dataTransfer) : true;
this.setState({
isOver: true,
canDrop
});
}
});
/**
* Function that gets called when an item is dragged over the drop zone
*
* @param {DragEvent} event - The dragover event
* @return {void}
*/
_defineProperty(this, "handleDragOver", event => {
// This allows onDrop to be fired
event.preventDefault();
const {
canDrop
} = this.state;
const {
dataTransfer
} = event;
if (!dataTransfer) {
return;
}
if (!canDrop) {
dataTransfer.dropEffect = 'none';
} else if (dataTransfer.effectAllowed) {
// Set the drop effect if it was defined
dataTransfer.dropEffect = dataTransfer.effectAllowed;
}
});
/**
* Function that gets called when an item is drop onto the drop zone
*
* @param {DragEvent} event - The drop event
* @return {void}
*/
_defineProperty(this, "handleDrop", event => {
event.preventDefault();
// reset enterLeaveCounter
this.enterLeaveCounter = 0;
const {
canDrop
} = this.state;
this.setState({
canDrop: false,
isDragging: false,
isOver: false
});
if (canDrop && onDrop) {
onDrop(event, this.props);
}
});
/**
* Function that gets called when an item is dragged out of the drop zone
*
* @param {DragEvent} event - The dragleave event
* @return {void}
*/
_defineProperty(this, "handleDragLeave", event => {
event.preventDefault();
// if enterLeaveCounter is zero, it means that we're actually leaving the item
if (--this.enterLeaveCounter > 0) {
return;
}
this.setState({
canDrop: false,
isDragging: false,
isOver: false
});
});
this.enterLeaveCounter = 0;
this.state = {
canDrop: false,
isDragging: false,
isOver: false
};
}
/**
* Removes event listeners when the component is going to unmount
* @inheritdoc
*/
componentWillUnmount() {
this.removeEventListeners(this.droppableEl);
}
/**
* Renders the HOC
*
* @private
* @inheritdoc
* @return {Element}
*/
render() {
const _this$props = this.props,
{
className
} = _this$props,
rest = _objectWithoutProperties(_this$props, _excluded);
const {
canDrop,
isOver
} = this.state;
const classes = classNames(className, {
'is-droppable': canDrop,
'is-over': isOver
});
const mergedProps = _objectSpread(_objectSpread(_objectSpread({}, rest), this.state), {}, {
className: classes,
ref: this.setDroppableRef
});
return /*#__PURE__*/React.createElement(Wrapped, mergedProps);
}
}, _defineProperty(_DroppableComponent, "defaultProps", {
className: ''
}), _DroppableComponent;
};
export default makeDroppable;
//# sourceMappingURL=makeDroppable.js.map