ngx-tree-dnd
Version:
Angular 7 support tree with drag-and-drop sortable data tree. It`s fast and smart.
537 lines • 45 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/*
Copyright (C) 2018 Yaroslav Kikot
This project is licensed under the terms of the MIT license.
https://github.com/Zicrael/ngx-tree-dnd
*/
import { Injectable } from '@angular/core';
import { Subject, BehaviorSubject, Observable } from 'rxjs';
import * as i0 from "@angular/core";
export class NgxTreeService {
constructor() {
this.treeStorage = [];
this.onDragStart = new Subject();
this.onDragEnter = new Subject();
this.onDragLeave = new Subject();
this.onDrop = new Subject();
this.onDrag = new Subject();
this.onAllowDrop = new Subject();
this.onDragEnd = new Subject();
this.onAddItem = new Subject();
this.onRenameItem = new Subject();
this.onStartRenameItem = new Subject();
this.onFinishRenameItem = new Subject();
this.onStartDeleteItem = new Subject();
this.onFinishDeleteItem = new Subject();
this.onCancelDeleteItem = new Subject();
this.config = new BehaviorSubject(null);
// set default config
this.defaulConfig = {
showActionButtons: true,
showAddButtons: true,
showRenameButtons: true,
showDeleteButtons: true,
showRootActionButtons: true,
enableExpandButtons: true,
enableDragging: true,
rootTitle: 'Root',
validationText: 'Enter valid name',
minCharacterLength: 1,
setItemsAsLinks: false,
setFontSize: 16,
setIconSize: 14
};
}
/*
get data and set it on observable.
if data = null set empty data array
*/
/**
* @param {?} item
* @return {?}
*/
getLocalData(item) {
/** @type {?} */
const data = new Observable(observer => {
this.treeStorage = item;
if (this.treeStorage && this.treeStorage !== null) {
observer.next(this.treeStorage);
}
else {
this.treeStorage = JSON.parse('[]');
observer.next(this.treeStorage);
}
});
return data;
}
/*
Element finder, it`s find element by id in tree.
Returns: finded element, parent array.
Watch out, this is recursive method.
*/
/**
* @private
* @param {?} list
* @param {?} id
* @param {?=} parent
* @return {?}
*/
elementFinder(list, id, parent) {
for (const item of list) {
if (item.id === id) {
this.findingResults = {
foundItem: item,
itemsList: list
};
if (parent) {
this.findingResults.parentItem = parent;
}
break;
}
else {
if (item.childrens.length > 0) {
this.elementFinder(item.childrens, id, item);
}
}
}
}
/*
Add new item to tree.
Its accepts 'type' for detect add root element or children.
Emit onAddItem Subject.
*/
/**
* @param {?} id
* @param {?} name
* @param {?=} parent
* @return {?}
*/
addNewItem(id, name, parent) {
/** @type {?} */
let pos = 1;
if (parent && parent.childrens.length !== 0) {
/** @type {?} */
const parentPrevChildren = parent.childrens.length - 1;
/** @type {?} */
const newItemPosition = parent.childrens[parentPrevChildren].options.position + 1;
pos = newItemPosition;
}
/** @type {?} */
const createObj = {
id,
name,
options: {
position: pos,
edit: true
},
childrens: []
};
if (parent != null) {
this.elementFinder(this.treeStorage, parent ? parent.id : null);
this.findingResults && this.findingResults.foundItem.childrens.push(createObj);
}
else {
this.treeStorage.push(createObj);
}
/** @type {?} */
const eventEmit = {
element: createObj,
parent: parent ? this.findingResults.foundItem : 'root'
};
this.onAddItem.next(eventEmit);
this.clearAction();
}
/*
Delete element.
It`s accepts 'id' for find item on tree.
Emit onStartDeleteItem Subject before delete.
Emit onFinishDeleteItem Subject after submit delete.
Emit onCancelDeleteItem Subject after on cancel delete.
*/
/**
* @param {?} id
* @return {?}
*/
deleteItem(id) {
this.elementFinder(this.treeStorage, id);
/** @type {?} */
const eventEmit = {
element: this.findingResults.foundItem,
parent: this.findingResults.parentItem || 'root'
};
this.onStartDeleteItem.next(eventEmit);
/** @type {?} */
let text;
if (this.findingResults.foundItem.name) {
text = `Do you really want to delete '${this.findingResults.foundItem.name}'?`;
}
else {
text = `Cancel creating a new item?`;
}
if (confirm(text)) {
this.onFinishDeleteItem.next(eventEmit);
/** @type {?} */
const i = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);
this.findingResults.itemsList.splice(i, 1);
}
else {
this.onCancelDeleteItem.next(eventEmit);
}
this.clearAction();
}
/*
Trigger start rename element.
It`s accepts 'name' and 'id' for find item on tree and set the name.
Emit onRenameItem Subject.
*/
/**
* @param {?} element
* @return {?}
*/
startRenameItem(element) {
this.elementFinder(this.treeStorage, element.id);
// event emit
/** @type {?} */
const eventEmit = {
element: this.findingResults.foundItem,
parent: this.findingResults.parentItem || 'root'
};
this.onStartRenameItem.next(eventEmit);
}
/*
Rename element.
It`s accepts 'name' and 'id' for find item on tree and set the name.
Emit onRenameItem Subject.
*/
/**
* @param {?} name
* @param {?} id
* @return {?}
*/
finishRenameItem(name, id) {
this.elementFinder(this.treeStorage, id);
// code
this.findingResults.foundItem.name = name;
this.findingResults.foundItem.options.edit = false;
// event emit
/** @type {?} */
const eventEmit = {
element: this.findingResults.foundItem,
parent: this.findingResults.parentItem || 'root'
};
this.onFinishRenameItem.next(eventEmit);
this.clearAction();
}
/*
Event: ondragstart;
On start dragging find element my id and set option currentlyDragging true.
*/
/**
* @param {?} eventObj
* @return {?}
*/
startDragging(eventObj) {
this.switchDropButton(true, this.treeStorage);
this.onDragStart.next(eventObj);
}
/*
Event: ondrag;
Trigger dragging element
*/
/**
* @param {?} eventObj
* @return {?}
*/
onDragProcess(eventObj) {
this.onDrag.next(eventObj);
}
/*
Event: ondragend;
detect end of drag action
*/
/**
* @param {?} eventObj
* @return {?}
*/
dragEndAction(eventObj) {
this.removeDestenationBorders(this.treeStorage);
this.switchDropButton(false, this.treeStorage);
this.onDragEnd.next(eventObj);
}
/*
Event: enterdropzone;
Entering drop zone for styling items.
*/
/**
* @param {?} eventObj
* @return {?}
*/
enterDropZone(eventObj) {
this.onDragEnter.next(eventObj);
}
/*
Event: dragover;
Detect hover on dropable elements
*/
/**
* @param {?} eventObj
* @return {?}
*/
onDragOver(eventObj) {
/** @type {?} */
const el = ((/** @type {?} */ (eventObj.target)));
if (el && el.id !== this.isDragging.id) {
/** @type {?} */
const elementHalfHeight = eventObj.event.toElement.offsetHeight / 2;
if (eventObj.event.offsetY < elementHalfHeight) {
el.options.destenationBottom = false;
el.options.destenationTop = true;
}
else {
el.options.destenationBottom = true;
el.options.destenationTop = false;
}
this.onAllowDrop.next(eventObj);
}
}
/*
Event: leavedropzone;
Leave drop zone for restyling items.
*/
/**
* @param {?} eventObj
* @return {?}
*/
leaveDropZone(eventObj) {
this.removeDestenationBorders(this.treeStorage);
this.onDragLeave.next(eventObj);
}
/*
Event: ondrop;
Its use where draggable item drop not on allowed for drop zone:
set item option currentlyDragging false.
return false.
*/
/**
* @param {?} eventObj
* @return {?}
*/
onDropItem(eventObj) {
if (eventObj.target) {
/** @type {?} */
const elementHalfHeight = eventObj.event.toElement.offsetHeight / 2;
if (eventObj.event.offsetY < elementHalfHeight) {
this.changeItemPosition(eventObj.target, 'up');
}
else {
this.changeItemPosition(eventObj.target, 'down');
}
this.onDrop.next(eventObj);
}
else {
/** @type {?} */
const dropZoneId = parseInt(eventObj.event.target.getAttribute('data-id'), null);
this.elementFinder(this.treeStorage, this.isDragging.id);
/** @type {?} */
const i = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);
/** @type {?} */
const copyItem = this.findingResults.itemsList.splice(i, 1)[0];
this.elementFinder(this.treeStorage, dropZoneId);
this.findingResults.foundItem.childrens.push(copyItem);
// this.sortTree();
eventObj.target = this.findingResults.foundItem;
this.onDrop.next(eventObj);
}
this.removeDestenationBorders(this.treeStorage);
this.switchDropButton(false, this.treeStorage);
this.clearAction();
}
/*
change position of items
need set direction before use
*/
/**
* @private
* @param {?} el
* @param {?} direction
* @return {?}
*/
changeItemPosition(el, direction) {
setTimeout(() => {
this.elementFinder(this.treeStorage, this.isDragging.id);
/** @type {?} */
const i = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);
/** @type {?} */
const copyItem = this.findingResults.itemsList.splice(i, 1)[0];
// end test
/** @type {?} */
const positionTarget = el.options.position;
this.elementFinder(this.treeStorage, el.id);
if (direction === 'up') {
for (const items of this.findingResults.itemsList) {
if (items.options.position >= positionTarget) {
items.options.position = items.options.position + 1;
copyItem.options.position = positionTarget;
}
}
}
else {
for (const items of this.findingResults.itemsList) {
if (items.options.position <= positionTarget) {
items.options.position = items.options.position - 1;
}
}
}
copyItem.options.position = positionTarget;
this.findingResults.itemsList.push(copyItem);
this.sortTree();
});
}
// get position of item
/**
* @param {?} item
* @return {?}
*/
getItemPosition(item) {
this.elementFinder(this.treeStorage, item.id);
/** @type {?} */
let position = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);
return ++position;
}
// sort tree byposition
/**
* @return {?}
*/
sortTree() {
this.sortElements(this.treeStorage);
}
// part of sortTree()
/**
* @private
* @param {?} tree
* @return {?}
*/
sortElements(tree) {
tree.sort(this.compate);
for (const item of tree) {
if (item.childrens.length > 0) {
this.sortElements(item.childrens);
}
}
}
// part of sortTree()
/**
* @private
* @param {?} a
* @param {?} b
* @return {?}
*/
compate(a, b) {
if (a.options.position < b.options.position) {
return -1;
}
if (a.options.position > b.options.position) {
return 1;
}
return 0;
}
// clear selectedElement && isDragging from element finder.
/**
* @return {?}
*/
clearAction() {
this.findingResults = null;
}
/**
* @private
* @param {?} data
* @return {?}
*/
removeDestenationBorders(data) {
for (const item of data) {
item.options.destenationBottom = false;
item.options.destenationTop = false;
if (item.childrens.length > 0) {
this.removeDestenationBorders(item.childrens);
}
}
}
/**
* @private
* @param {?} bool
* @param {?} data
* @return {?}
*/
switchDropButton(bool, data) {
for (const el of data) {
el.options.showActionButtons = !bool;
if (el.id !== this.isDragging.id) {
el.options.showDropChildZone = bool;
}
if (el.childrens.length > 0) {
this.switchDropButton(bool, el.childrens);
}
}
}
}
NgxTreeService.decorators = [
{ type: Injectable, args: [{
providedIn: 'root'
},] },
];
/** @nocollapse */
NgxTreeService.ctorParameters = () => [];
/** @nocollapse */ NgxTreeService.ngInjectableDef = i0.defineInjectable({ factory: function NgxTreeService_Factory() { return new NgxTreeService(); }, token: NgxTreeService, providedIn: "root" });
if (false) {
/** @type {?} */
NgxTreeService.prototype.treeStorage;
/**
* @type {?}
* @private
*/
NgxTreeService.prototype.findingResults;
/** @type {?} */
NgxTreeService.prototype.isDragging;
/** @type {?} */
NgxTreeService.prototype.dragEvent;
/** @type {?} */
NgxTreeService.prototype.direction;
/** @type {?} */
NgxTreeService.prototype.lastExpandState;
/** @type {?} */
NgxTreeService.prototype.onDragStart;
/** @type {?} */
NgxTreeService.prototype.onDragEnter;
/** @type {?} */
NgxTreeService.prototype.onDragLeave;
/** @type {?} */
NgxTreeService.prototype.onDrop;
/** @type {?} */
NgxTreeService.prototype.onDrag;
/** @type {?} */
NgxTreeService.prototype.onAllowDrop;
/** @type {?} */
NgxTreeService.prototype.onDragEnd;
/** @type {?} */
NgxTreeService.prototype.onAddItem;
/** @type {?} */
NgxTreeService.prototype.onRenameItem;
/** @type {?} */
NgxTreeService.prototype.onStartRenameItem;
/** @type {?} */
NgxTreeService.prototype.onFinishRenameItem;
/** @type {?} */
NgxTreeService.prototype.onStartDeleteItem;
/** @type {?} */
NgxTreeService.prototype.onFinishDeleteItem;
/** @type {?} */
NgxTreeService.prototype.onCancelDeleteItem;
/** @type {?} */
NgxTreeService.prototype.config;
/** @type {?} */
NgxTreeService.prototype.defaulConfig;
}
//# 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Copyright (C) 2018 Yaroslav Kikot\n This project is licensed under the terms of the MIT license.\n https://github.com/Zicrael/ngx-tree-dnd\n */\nimport { Injectable } from '@angular/core';\nimport { Subject, BehaviorSubject, Observable } from 'rxjs';\nimport { TreeModel, TreeConfig, FindingResults } from './models/tree-view.model';\n\n@Injectable({\n  providedIn: 'root'\n})\nexport class NgxTreeService {\n  treeStorage: TreeModel[] = [];\n  private findingResults: FindingResults;\n  // listOfSelectedElement: TreeModel[];\n  // parentOfSelected: TreeModel;\n  // private selectedElement: TreeModel;\n  isDragging: TreeModel;\n  dragEvent: {};\n  direction: string;\n  lastExpandState: boolean;\n  onDragStart = new Subject<any>();\n  onDragEnter = new Subject<any>();\n  onDragLeave = new Subject<any>();\n  onDrop = new Subject<any>();\n  onDrag = new Subject<any>();\n  onAllowDrop = new Subject<any>();\n  onDragEnd = new Subject<any>();\n  onAddItem = new Subject<any>();\n  onRenameItem = new Subject<any>();\n  onStartRenameItem = new Subject<any>();\n  onFinishRenameItem = new Subject<any>();\n  onStartDeleteItem = new Subject<any>();\n  onFinishDeleteItem = new Subject<any>();\n  onCancelDeleteItem = new Subject<any>();\n  config = new BehaviorSubject<any>(null);\n  defaulConfig: TreeConfig;\n\n  constructor() {\n    // set default config\n    this.defaulConfig = {\n      showActionButtons: true,\n      showAddButtons: true,\n      showRenameButtons: true,\n      showDeleteButtons: true,\n      showRootActionButtons: true,\n      enableExpandButtons: true,\n      enableDragging: true,\n      rootTitle: 'Root',\n      validationText: 'Enter valid name',\n      minCharacterLength: 1,\n      setItemsAsLinks: false,\n      setFontSize: 16,\n      setIconSize: 14\n    };\n  }\n\n  /*\n    get data and set it on observable.\n    if data = null set empty data array\n  */\n  public getLocalData(item) {\n    const data = new Observable(observer => {\n    this.treeStorage = item;\n      if ( this.treeStorage && this.treeStorage !== null ) {\n        observer.next(this.treeStorage);\n      } else {\n        this.treeStorage  = JSON.parse('[]');\n        observer.next(this.treeStorage);\n      }\n    });\n    return data;\n  }\n\n  /*\n   Element finder, it`s find element by id in tree.\n   Returns: finded element, parent array.\n   Watch out, this is recursive method.\n  */\n   private elementFinder(list, id, parent?) {\n     for (const item of list) {\n       if (item.id === id) {\n         this.findingResults = {\n           foundItem: item,\n           itemsList: list\n         }\n         if (parent) {\n           this.findingResults.parentItem = parent;\n         }\n         break;\n       } else {\n         if (item.childrens.length > 0) {\n           this.elementFinder(item.childrens, id, item);\n         }\n       }\n     }\n\n  }\n\n\n   /*\n   Add new item to tree.\n   Its accepts 'type' for detect add root element or children.\n   Emit onAddItem Subject.\n  */\n  public addNewItem(id, name, parent?) {\n    let pos = 1;\n    if (parent && parent.childrens.length !== 0) {\n      const parentPrevChildren = parent.childrens.length - 1;\n      const newItemPosition = parent.childrens[parentPrevChildren].options.position + 1;\n      pos = newItemPosition;\n    }\n    const createObj: TreeModel = {\n      id,\n      name,\n      options:  {\n        position: pos,\n        edit: true\n      },\n      childrens: []\n    };\n    \n    if(parent != null) {\n      this.elementFinder(this.treeStorage, parent ? parent.id : null);\n      this.findingResults && this.findingResults.foundItem.childrens.push(createObj);\n    }\n    else{\n      this.treeStorage.push(createObj);\n    }\n    \n    const eventEmit = {\n      element: createObj,\n      parent: parent ? this.findingResults.foundItem : 'root'\n    };\n\n    this.onAddItem.next(eventEmit);\n    this.clearAction();\n  }\n\n  /*\n   Delete element.\n   It`s accepts 'id' for find item on tree.\n   Emit onStartDeleteItem Subject before delete.\n   Emit onFinishDeleteItem Subject after submit delete.\n   Emit onCancelDeleteItem Subject after on cancel delete.\n  */\n  public deleteItem(id) {\n    this.elementFinder(this.treeStorage, id);\n    const eventEmit = {\n      element: this.findingResults.foundItem,\n      parent: this.findingResults.parentItem || 'root'\n    };\n    this.onStartDeleteItem.next(eventEmit);\n    let text: string;\n    if( this.findingResults.foundItem.name ) {\n      text = `Do you really want to delete '${this.findingResults.foundItem.name}'?`;\n    } else {\n      text = `Cancel creating a new item?`;\n    }\n    if(confirm(text)) {\n      this.onFinishDeleteItem.next(eventEmit);\n      const i = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);\n      this.findingResults.itemsList.splice(i, 1);\n    } else {\n      this.onCancelDeleteItem.next(eventEmit);\n    }\n    this.clearAction();\n  }\n\n  /*\n   Trigger start rename element.\n   It`s accepts 'name' and 'id' for find item on tree and set the name.\n   Emit onRenameItem Subject.\n  */\n public startRenameItem(element) {\n    this.elementFinder(this.treeStorage, element.id);\n    // event emit\n    const eventEmit = {\n      element: this.findingResults.foundItem,\n      parent: this.findingResults.parentItem || 'root'\n    };\n    this.onStartRenameItem.next(eventEmit);\n  }\n\n  /*\n   Rename element.\n   It`s accepts 'name' and 'id' for find item on tree and set the name.\n   Emit onRenameItem Subject.\n  */\n  public finishRenameItem(name, id) {\n    this.elementFinder(this.treeStorage, id);\n    // code\n    this.findingResults.foundItem.name = name;\n    this.findingResults.foundItem.options.edit = false;\n    // event emit\n    const eventEmit = {\n      element: this.findingResults.foundItem,\n      parent: this.findingResults.parentItem || 'root'\n    };\n    this.onFinishRenameItem.next(eventEmit);\n    this.clearAction();\n  }\n\n  /*\n   Event: ondragstart;\n   On start dragging find element my id and set option currentlyDragging true.\n  */\n  public startDragging(eventObj) {\n    this.switchDropButton(true, this.treeStorage);\n    this.onDragStart.next(eventObj);\n  }\n\n  /*\n   Event: ondrag;\n   Trigger dragging element\n  */\n  public onDragProcess(eventObj) {\n    this.onDrag.next(eventObj);\n  }\n\n  /*\n   Event: ondragend;\n   detect end of drag action\n  */\n  public dragEndAction(eventObj) {\n    this.removeDestenationBorders(this.treeStorage);\n    this.switchDropButton(false, this.treeStorage);\n    this.onDragEnd.next(eventObj);\n  }\n\n  /*\n    Event: enterdropzone;\n    Entering drop zone for styling items.\n  */\n  public enterDropZone(eventObj) {\n    this.onDragEnter.next(eventObj);\n  }\n\n\n  /*\n    Event: dragover;\n    Detect hover on dropable elements\n  */\n  public onDragOver(eventObj) {\n    const el = (eventObj.target as TreeModel);\n    if (el && el.id !== this.isDragging.id ) {\n      const elementHalfHeight = eventObj.event.toElement.offsetHeight / 2;\n      if (eventObj.event.offsetY < elementHalfHeight) {\n        el.options.destenationBottom = false;\n        el.options.destenationTop = true;\n      } else  {\n        el.options.destenationBottom = true;\n        el.options.destenationTop = false;\n      }\n      this.onAllowDrop.next(eventObj);\n    }\n  }\n\n  /*\n    Event: leavedropzone;\n    Leave drop zone for restyling items.\n  */\n  public leaveDropZone(eventObj) {\n      this.removeDestenationBorders(this.treeStorage);\n      this.onDragLeave.next(eventObj);\n  }\n\n  /*\n    Event: ondrop;\n    Its use where draggable item drop not on allowed for drop zone:\n    set item option currentlyDragging false.\n    return false.\n */\n  public onDropItem(eventObj) {\n    if ( eventObj.target ) {\n      const elementHalfHeight = eventObj.event.toElement.offsetHeight / 2;\n        if (  eventObj.event.offsetY < elementHalfHeight ) {\n          this.changeItemPosition(eventObj.target, 'up');\n        } else {\n          this.changeItemPosition(eventObj.target, 'down');\n        }\n        this.onDrop.next(eventObj);\n    } else {\n      const dropZoneId = parseInt(eventObj.event.target.getAttribute('data-id'), null);\n      this.elementFinder(this.treeStorage, this.isDragging.id);\n      const i = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);\n      const copyItem = this.findingResults.itemsList.splice(i, 1)[0];\n      this.elementFinder(this.treeStorage, dropZoneId);\n      this.findingResults.foundItem.childrens.push(copyItem);\n      // this.sortTree();\n      eventObj.target = this.findingResults.foundItem;\n      this.onDrop.next(eventObj);\n    }\n    this.removeDestenationBorders(this.treeStorage);\n    this.switchDropButton(false, this.treeStorage);\n    this.clearAction();\n  }\n\n  /*\n    change position of items\n    need set direction before use\n  */\n  private changeItemPosition(el, direction) {\n    setTimeout( () => {\n      this.elementFinder(this.treeStorage, this.isDragging.id);\n      const i = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);\n      const copyItem = this.findingResults.itemsList.splice(i, 1)[0];\n      // end test\n      const positionTarget = el.options.position;\n      this.elementFinder(this.treeStorage, el.id);\n      if (direction === 'up') {\n        for (const items of this.findingResults.itemsList) {\n          if ( items.options.position >= positionTarget ) {\n            items.options.position = items.options.position + 1;\n            copyItem.options.position = positionTarget;\n          }\n        }\n      } else {\n        for (const items of this.findingResults.itemsList) {\n          if ( items.options.position <=  positionTarget ) {\n            items.options.position = items.options.position - 1;\n          }\n        }\n      }\n      copyItem.options.position = positionTarget;\n      this.findingResults.itemsList.push(copyItem);\n      this.sortTree();\n    });\n  }\n\n  // get position of item\n  public getItemPosition(item) {\n    this.elementFinder(this.treeStorage, item.id);\n    let position = this.findingResults.itemsList.indexOf(this.findingResults.foundItem);\n    return ++position;\n  }\n\n  // sort tree byposition\n  public sortTree() {\n    this.sortElements(this.treeStorage);\n  }\n\n  // part of sortTree()\n  private sortElements (tree) {\n    tree.sort( this.compate );\n    for (const item of tree ) {\n      if (item.childrens.length > 0) {\n       this.sortElements(item.childrens);\n      }\n    }\n  }\n\n  // part of sortTree()\n  private compate(a, b) {\n      if (a.options.position < b.options.position) {\n        return -1;\n      }\n      if (a.options.position > b.options.position) {\n        return 1;\n      }\n      return 0;\n  }\n\n  // clear selectedElement && isDragging from element finder.\n  public clearAction() {\n    this.findingResults = null;\n  }\n\n  private removeDestenationBorders(data) {\n    for (const item of data) {\n      item.options.destenationBottom = false;\n      item.options.destenationTop = false;\n      if (item.childrens.length > 0) {\n        this.removeDestenationBorders(item.childrens);\n      }\n    }\n  }\n\n  private switchDropButton(bool, data) {\n    for (const el of data) {\n      el.options.showActionButtons = !bool;\n      if (el.id !== this.isDragging.id) {\n        el.options.showDropChildZone = bool;\n      }\n      if (el.childrens.length > 0) {\n        this.switchDropButton(bool, el.childrens);\n      }\n    }\n  }\n}\n"]}