devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
314 lines (309 loc) • 12 kB
JavaScript
/**
* DevExtreme (cjs/events/drag.js)
* Version: 21.2.4
* Build date: Mon Dec 06 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
function _typeof(obj) {
if ("function" === typeof Symbol && "symbol" === typeof Symbol.iterator) {
_typeof = function(obj) {
return typeof obj
}
} else {
_typeof = function(obj) {
return obj && "function" === typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj
}
}
return _typeof(obj)
}
exports.start = exports.move = exports.leave = exports.enter = exports.end = exports.drop = void 0;
var _renderer = _interopRequireDefault(require("../core/renderer"));
var _element_data = require("../core/element_data");
var _array = require("../core/utils/array");
var iteratorUtils = _interopRequireWildcard(require("../core/utils/iterator"));
var _dom = require("../core/utils/dom");
var _event_registrator = _interopRequireDefault(require("./core/event_registrator"));
var _index = require("./utils/index");
var _emitter = _interopRequireDefault(require("./gesture/emitter.gesture"));
var _emitter_registrator = _interopRequireDefault(require("./core/emitter_registrator"));
function _getRequireWildcardCache(nodeInterop) {
if ("function" !== typeof WeakMap) {
return null
}
var cacheBabelInterop = new WeakMap;
var cacheNodeInterop = new WeakMap;
return (_getRequireWildcardCache = function(nodeInterop) {
return nodeInterop ? cacheNodeInterop : cacheBabelInterop
})(nodeInterop)
}
function _interopRequireWildcard(obj, nodeInterop) {
if (!nodeInterop && obj && obj.__esModule) {
return obj
}
if (null === obj || "object" !== _typeof(obj) && "function" !== typeof obj) {
return {
default: obj
}
}
var cache = _getRequireWildcardCache(nodeInterop);
if (cache && cache.has(obj)) {
return cache.get(obj)
}
var newObj = {};
var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor;
for (var key in obj) {
if ("default" !== key && 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 _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
}
}
var DRAG_START_EVENT = "dxdragstart";
exports.start = DRAG_START_EVENT;
var DRAG_EVENT = "dxdrag";
exports.move = DRAG_EVENT;
var DRAG_END_EVENT = "dxdragend";
exports.end = DRAG_END_EVENT;
var DRAG_ENTER_EVENT = "dxdragenter";
exports.enter = DRAG_ENTER_EVENT;
var DRAG_LEAVE_EVENT = "dxdragleave";
exports.leave = DRAG_LEAVE_EVENT;
var DROP_EVENT = "dxdrop";
exports.drop = DROP_EVENT;
var DX_DRAG_EVENTS_COUNT_KEY = "dxDragEventsCount";
var knownDropTargets = [];
var knownDropTargetSelectors = [];
var knownDropTargetConfigs = [];
var dropTargetRegistration = {
setup: function(element, data) {
var knownDropTarget = -1 !== (0, _array.inArray)(element, knownDropTargets);
if (!knownDropTarget) {
knownDropTargets.push(element);
knownDropTargetSelectors.push([]);
knownDropTargetConfigs.push(data || {})
}
},
add: function(element, handleObj) {
var index = (0, _array.inArray)(element, knownDropTargets);
this.updateEventsCounter(element, handleObj.type, 1);
var selector = handleObj.selector;
if (-1 === (0, _array.inArray)(selector, knownDropTargetSelectors[index])) {
knownDropTargetSelectors[index].push(selector)
}
},
updateEventsCounter: function(element, event, value) {
if ([DRAG_ENTER_EVENT, DRAG_LEAVE_EVENT, DROP_EVENT].indexOf(event) > -1) {
var eventsCount = (0, _element_data.data)(element, DX_DRAG_EVENTS_COUNT_KEY) || 0;
(0, _element_data.data)(element, DX_DRAG_EVENTS_COUNT_KEY, Math.max(0, eventsCount + value))
}
},
remove: function(element, handleObj) {
this.updateEventsCounter(element, handleObj.type, -1)
},
teardown: function(element) {
var handlersCount = (0, _element_data.data)(element, DX_DRAG_EVENTS_COUNT_KEY);
if (!handlersCount) {
var index = (0, _array.inArray)(element, knownDropTargets);
knownDropTargets.splice(index, 1);
knownDropTargetSelectors.splice(index, 1);
knownDropTargetConfigs.splice(index, 1);
(0, _element_data.removeData)(element, DX_DRAG_EVENTS_COUNT_KEY)
}
}
};
(0, _event_registrator.default)(DRAG_ENTER_EVENT, dropTargetRegistration);
(0, _event_registrator.default)(DRAG_LEAVE_EVENT, dropTargetRegistration);
(0, _event_registrator.default)(DROP_EVENT, dropTargetRegistration);
var getItemDelegatedTargets = function($element) {
var dropTargetIndex = (0, _array.inArray)($element.get(0), knownDropTargets);
var dropTargetSelectors = knownDropTargetSelectors[dropTargetIndex].filter((function(selector) {
return selector
}));
var $delegatedTargets = $element.find(dropTargetSelectors.join(", "));
if (-1 !== (0, _array.inArray)(void 0, knownDropTargetSelectors[dropTargetIndex])) {
$delegatedTargets = $delegatedTargets.add($element)
}
return $delegatedTargets
};
var getItemConfig = function($element) {
var dropTargetIndex = (0, _array.inArray)($element.get(0), knownDropTargets);
return knownDropTargetConfigs[dropTargetIndex]
};
var getItemPosition = function(dropTargetConfig, $element) {
if (dropTargetConfig.itemPositionFunc) {
return dropTargetConfig.itemPositionFunc($element)
} else {
return $element.offset()
}
};
var getItemSize = function(dropTargetConfig, $element) {
if (dropTargetConfig.itemSizeFunc) {
return dropTargetConfig.itemSizeFunc($element)
}
return {
width: $element.get(0).getBoundingClientRect().width,
height: $element.get(0).getBoundingClientRect().height
}
};
var DragEmitter = _emitter.default.inherit({
ctor: function(element) {
this.callBase(element);
this.direction = "both"
},
_init: function(e) {
this._initEvent = e
},
_start: function(e) {
e = this._fireEvent(DRAG_START_EVENT, this._initEvent);
this._maxLeftOffset = e.maxLeftOffset;
this._maxRightOffset = e.maxRightOffset;
this._maxTopOffset = e.maxTopOffset;
this._maxBottomOffset = e.maxBottomOffset;
var dropTargets = (0, _array.wrapToArray)(e.targetElements || (null === e.targetElements ? [] : knownDropTargets));
this._dropTargets = iteratorUtils.map(dropTargets, (function(element) {
return (0, _renderer.default)(element).get(0)
}))
},
_move: function(e) {
var eventData = (0, _index.eventData)(e);
var dragOffset = this._calculateOffset(eventData);
e = this._fireEvent(DRAG_EVENT, e, {
offset: dragOffset
});
this._processDropTargets(e);
if (!e._cancelPreventDefault) {
e.preventDefault()
}
},
_calculateOffset: function(eventData) {
return {
x: this._calculateXOffset(eventData),
y: this._calculateYOffset(eventData)
}
},
_calculateXOffset: function(eventData) {
if ("vertical" !== this.direction) {
var offset = eventData.x - this._startEventData.x;
return this._fitOffset(offset, this._maxLeftOffset, this._maxRightOffset)
}
return 0
},
_calculateYOffset: function(eventData) {
if ("horizontal" !== this.direction) {
var offset = eventData.y - this._startEventData.y;
return this._fitOffset(offset, this._maxTopOffset, this._maxBottomOffset)
}
return 0
},
_fitOffset: function(offset, minOffset, maxOffset) {
if (null != minOffset) {
offset = Math.max(offset, -minOffset)
}
if (null != maxOffset) {
offset = Math.min(offset, maxOffset)
}
return offset
},
_processDropTargets: function(e) {
var target = this._findDropTarget(e);
var sameTarget = target === this._currentDropTarget;
if (!sameTarget) {
this._fireDropTargetEvent(e, DRAG_LEAVE_EVENT);
this._currentDropTarget = target;
this._fireDropTargetEvent(e, DRAG_ENTER_EVENT)
}
},
_fireDropTargetEvent: function(event, eventName) {
if (!this._currentDropTarget) {
return
}
var eventData = {
type: eventName,
originalEvent: event,
draggingElement: this._$element.get(0),
target: this._currentDropTarget
};
(0, _index.fireEvent)(eventData)
},
_findDropTarget: function(e) {
var that = this;
var result;
iteratorUtils.each(knownDropTargets, (function(_, target) {
if (!that._checkDropTargetActive(target)) {
return
}
var $target = (0, _renderer.default)(target);
iteratorUtils.each(getItemDelegatedTargets($target), (function(_, delegatedTarget) {
var $delegatedTarget = (0, _renderer.default)(delegatedTarget);
if (that._checkDropTarget(getItemConfig($target), $delegatedTarget, (0, _renderer.default)(result), e)) {
result = delegatedTarget
}
}))
}));
return result
},
_checkDropTargetActive: function(target) {
var active = false;
iteratorUtils.each(this._dropTargets, (function(_, activeTarget) {
active = active || activeTarget === target || (0, _dom.contains)(activeTarget, target);
return !active
}));
return active
},
_checkDropTarget: function(config, $target, $prevTarget, e) {
var isDraggingElement = $target.get(0) === (0, _renderer.default)(e.target).get(0);
if (isDraggingElement) {
return false
}
var targetPosition = getItemPosition(config, $target);
if (e.pageX < targetPosition.left) {
return false
}
if (e.pageY < targetPosition.top) {
return false
}
var targetSize = getItemSize(config, $target);
if (e.pageX > targetPosition.left + targetSize.width) {
return false
}
if (e.pageY > targetPosition.top + targetSize.height) {
return false
}
if ($prevTarget.length && $prevTarget.closest($target).length) {
return false
}
if (config.checkDropTarget && !config.checkDropTarget($target, e)) {
return false
}
return $target
},
_end: function(e) {
var eventData = (0, _index.eventData)(e);
this._fireEvent(DRAG_END_EVENT, e, {
offset: this._calculateOffset(eventData)
});
this._fireDropTargetEvent(e, DROP_EVENT);
delete this._currentDropTarget
}
});
(0, _emitter_registrator.default)({
emitter: DragEmitter,
events: [DRAG_START_EVENT, DRAG_EVENT, DRAG_END_EVENT]
});