devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (cjs/events/drag.js)
* Version: 23.2.6
* Build date: Wed May 01 2024
*
* Copyright (c) 2012 - 2024 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
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
}
}
const DRAG_START_EVENT = "dxdragstart";
exports.start = "dxdragstart";
const DRAG_EVENT = "dxdrag";
exports.move = "dxdrag";
const DRAG_END_EVENT = "dxdragend";
exports.end = "dxdragend";
const DRAG_ENTER_EVENT = "dxdragenter";
exports.enter = DRAG_ENTER_EVENT;
const DRAG_LEAVE_EVENT = "dxdragleave";
exports.leave = DRAG_LEAVE_EVENT;
const DROP_EVENT = "dxdrop";
exports.drop = DROP_EVENT;
const DX_DRAG_EVENTS_COUNT_KEY = "dxDragEventsCount";
const knownDropTargets = [];
const knownDropTargetSelectors = [];
const knownDropTargetConfigs = [];
const dropTargetRegistration = {
setup: function(element, data) {
const knownDropTarget = knownDropTargets.includes(element);
if (!knownDropTarget) {
knownDropTargets.push(element);
knownDropTargetSelectors.push([]);
knownDropTargetConfigs.push(data || {})
}
},
add: function(element, handleObj) {
const index = knownDropTargets.indexOf(element);
this.updateEventsCounter(element, handleObj.type, 1);
const selector = handleObj.selector;
if (!knownDropTargetSelectors[index].includes(selector)) {
knownDropTargetSelectors[index].push(selector)
}
},
updateEventsCounter: function(element, event, value) {
if ([DRAG_ENTER_EVENT, DRAG_LEAVE_EVENT, DROP_EVENT].indexOf(event) > -1) {
const eventsCount = (0, _element_data.data)(element, "dxDragEventsCount") || 0;
(0, _element_data.data)(element, "dxDragEventsCount", Math.max(0, eventsCount + value))
}
},
remove: function(element, handleObj) {
this.updateEventsCounter(element, handleObj.type, -1)
},
teardown: function(element) {
const handlersCount = (0, _element_data.data)(element, "dxDragEventsCount");
if (!handlersCount) {
const index = knownDropTargets.indexOf(element);
knownDropTargets.splice(index, 1);
knownDropTargetSelectors.splice(index, 1);
knownDropTargetConfigs.splice(index, 1);
(0, _element_data.removeData)(element, "dxDragEventsCount")
}
}
};
(0, _event_registrator.default)(DRAG_ENTER_EVENT, dropTargetRegistration);
(0, _event_registrator.default)(DRAG_LEAVE_EVENT, dropTargetRegistration);
(0, _event_registrator.default)(DROP_EVENT, dropTargetRegistration);
const getItemDelegatedTargets = function($element) {
const dropTargetIndex = knownDropTargets.indexOf($element.get(0));
const dropTargetSelectors = knownDropTargetSelectors[dropTargetIndex].filter(selector => selector);
let $delegatedTargets = $element.find(dropTargetSelectors.join(", "));
if (knownDropTargetSelectors[dropTargetIndex].includes(void 0)) {
$delegatedTargets = $delegatedTargets.add($element)
}
return $delegatedTargets
};
const getItemConfig = function($element) {
const dropTargetIndex = knownDropTargets.indexOf($element.get(0));
return knownDropTargetConfigs[dropTargetIndex]
};
const getItemPosition = function(dropTargetConfig, $element) {
if (dropTargetConfig.itemPositionFunc) {
return dropTargetConfig.itemPositionFunc($element)
} else {
return $element.offset()
}
};
const getItemSize = function(dropTargetConfig, $element) {
if (dropTargetConfig.itemSizeFunc) {
return dropTargetConfig.itemSizeFunc($element)
}
return {
width: $element.get(0).getBoundingClientRect().width,
height: $element.get(0).getBoundingClientRect().height
}
};
const 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("dxdragstart", this._initEvent);
this._maxLeftOffset = e.maxLeftOffset;
this._maxRightOffset = e.maxRightOffset;
this._maxTopOffset = e.maxTopOffset;
this._maxBottomOffset = e.maxBottomOffset;
if (e.targetElements || null === e.targetElements) {
const dropTargets = (0, _array.wrapToArray)(e.targetElements || []);
this._dropTargets = iteratorUtils.map(dropTargets, (function(element) {
return (0, _renderer.default)(element).get(0)
}))
} else {
this._dropTargets = knownDropTargets
}
},
_move: function(e) {
const eventData = (0, _index.eventData)(e);
const dragOffset = this._calculateOffset(eventData);
e = this._fireEvent("dxdrag", 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) {
const offset = eventData.x - this._startEventData.x;
return this._fitOffset(offset, this._maxLeftOffset, this._maxRightOffset)
}
return 0
},
_calculateYOffset: function(eventData) {
if ("horizontal" !== this.direction) {
const 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) {
const target = this._findDropTarget(e);
const 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
}
const eventData = {
type: eventName,
originalEvent: event,
draggingElement: this._$element.get(0),
target: this._currentDropTarget
};
(0, _index.fireEvent)(eventData)
},
_findDropTarget: function(e) {
const that = this;
let result;
iteratorUtils.each(knownDropTargets, (function(_, target) {
if (!that._checkDropTargetActive(target)) {
return
}
const $target = (0, _renderer.default)(target);
iteratorUtils.each(getItemDelegatedTargets($target), (function(_, delegatedTarget) {
const $delegatedTarget = (0, _renderer.default)(delegatedTarget);
if (that._checkDropTarget(getItemConfig($target), $delegatedTarget, (0, _renderer.default)(result), e)) {
result = delegatedTarget
}
}))
}));
return result
},
_checkDropTargetActive: function(target) {
let 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) {
const isDraggingElement = $target.get(0) === (0, _renderer.default)(e.target).get(0);
if (isDraggingElement) {
return false
}
const targetPosition = getItemPosition(config, $target);
if (e.pageX < targetPosition.left) {
return false
}
if (e.pageY < targetPosition.top) {
return false
}
const 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) {
const eventData = (0, _index.eventData)(e);
this._fireEvent("dxdragend", e, {
offset: this._calculateOffset(eventData)
});
this._fireDropTargetEvent(e, DROP_EVENT);
delete this._currentDropTarget
}
});
(0, _emitter_registrator.default)({
emitter: DragEmitter,
events: ["dxdragstart", "dxdrag", "dxdragend"]
});