angular-draggable.directive.js 54 KB

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  1. /**
  2. * @fileoverview added by tsickle
  3. * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
  4. */
  5. import { Directive, ElementRef, Renderer2, Input, Output, HostListener, EventEmitter } from '@angular/core';
  6. import { fromEvent } from 'rxjs';
  7. import { Position } from './models/position';
  8. import { HelperBlock } from './widgets/helper-block';
  9. var AngularDraggableDirective = /** @class */ (function () {
  10. function AngularDraggableDirective(el, renderer) {
  11. this.el = el;
  12. this.renderer = renderer;
  13. this.allowDrag = true;
  14. this.moving = false;
  15. this.orignal = null;
  16. this.oldTrans = new Position(0, 0);
  17. this.tempTrans = new Position(0, 0);
  18. this.currTrans = new Position(0, 0);
  19. this.oldZIndex = '';
  20. this._zIndex = '';
  21. this.needTransform = false;
  22. this.draggingSub = null;
  23. /**
  24. * Bugfix: iFrames, and context unrelated elements block all events, and are unusable
  25. * https://github.com/xieziyu/angular2-draggable/issues/84
  26. */
  27. this._helperBlock = null;
  28. this.started = new EventEmitter();
  29. this.stopped = new EventEmitter();
  30. this.edge = new EventEmitter();
  31. /**
  32. * List of allowed out of bounds edges *
  33. */
  34. this.outOfBounds = {
  35. top: false,
  36. right: false,
  37. bottom: false,
  38. left: false
  39. };
  40. /**
  41. * Round the position to nearest grid
  42. */
  43. this.gridSize = 1;
  44. /**
  45. * Whether to limit the element stay in the bounds
  46. */
  47. this.inBounds = false;
  48. /**
  49. * Whether the element should use it's previous drag position on a new drag event.
  50. */
  51. this.trackPosition = true;
  52. /**
  53. * Input css scale transform of element so translations are correct
  54. */
  55. this.scale = 1;
  56. /**
  57. * Whether to prevent default event
  58. */
  59. this.preventDefaultEvent = false;
  60. /**
  61. * Set initial position by offsets
  62. */
  63. this.position = { x: 0, y: 0 };
  64. /**
  65. * Lock axis: 'x' or 'y'
  66. */
  67. this.lockAxis = null;
  68. /**
  69. * Emit position offsets when moving
  70. */
  71. this.movingOffset = new EventEmitter();
  72. /**
  73. * Emit position offsets when put back
  74. */
  75. this.endOffset = new EventEmitter();
  76. this._helperBlock = new HelperBlock(el.nativeElement, renderer);
  77. }
  78. Object.defineProperty(AngularDraggableDirective.prototype, "zIndex", {
  79. /** Set z-index when not dragging */
  80. set: /**
  81. * Set z-index when not dragging
  82. * @param {?} setting
  83. * @return {?}
  84. */
  85. function (setting) {
  86. this.renderer.setStyle(this.el.nativeElement, 'z-index', setting);
  87. this._zIndex = setting;
  88. },
  89. enumerable: true,
  90. configurable: true
  91. });
  92. Object.defineProperty(AngularDraggableDirective.prototype, "ngDraggable", {
  93. set: /**
  94. * @param {?} setting
  95. * @return {?}
  96. */
  97. function (setting) {
  98. if (setting !== undefined && setting !== null && setting !== '') {
  99. this.allowDrag = !!setting;
  100. /** @type {?} */
  101. var element = this.getDragEl();
  102. if (this.allowDrag) {
  103. this.renderer.addClass(element, 'ng-draggable');
  104. }
  105. else {
  106. this.putBack();
  107. this.renderer.removeClass(element, 'ng-draggable');
  108. }
  109. }
  110. },
  111. enumerable: true,
  112. configurable: true
  113. });
  114. /**
  115. * @return {?}
  116. */
  117. AngularDraggableDirective.prototype.ngOnInit = /**
  118. * @return {?}
  119. */
  120. function () {
  121. if (this.allowDrag) {
  122. /** @type {?} */
  123. var element = this.getDragEl();
  124. this.renderer.addClass(element, 'ng-draggable');
  125. }
  126. this.resetPosition();
  127. };
  128. /**
  129. * @return {?}
  130. */
  131. AngularDraggableDirective.prototype.ngOnDestroy = /**
  132. * @return {?}
  133. */
  134. function () {
  135. this.bounds = null;
  136. this.handle = null;
  137. this.orignal = null;
  138. this.oldTrans = null;
  139. this.tempTrans = null;
  140. this.currTrans = null;
  141. this._helperBlock.dispose();
  142. this._helperBlock = null;
  143. if (this.draggingSub) {
  144. this.draggingSub.unsubscribe();
  145. }
  146. };
  147. /**
  148. * @param {?} changes
  149. * @return {?}
  150. */
  151. AngularDraggableDirective.prototype.ngOnChanges = /**
  152. * @param {?} changes
  153. * @return {?}
  154. */
  155. function (changes) {
  156. if (changes['position'] && !changes['position'].isFirstChange()) {
  157. /** @type {?} */
  158. var p = changes['position'].currentValue;
  159. if (!this.moving) {
  160. if (Position.isIPosition(p)) {
  161. this.oldTrans.set(p);
  162. }
  163. else {
  164. this.oldTrans.reset();
  165. }
  166. this.transform();
  167. }
  168. else {
  169. this.needTransform = true;
  170. }
  171. }
  172. };
  173. /**
  174. * @return {?}
  175. */
  176. AngularDraggableDirective.prototype.ngAfterViewInit = /**
  177. * @return {?}
  178. */
  179. function () {
  180. if (this.inBounds) {
  181. this.boundsCheck();
  182. this.oldTrans.add(this.tempTrans);
  183. this.tempTrans.reset();
  184. }
  185. };
  186. /**
  187. * @private
  188. * @return {?}
  189. */
  190. AngularDraggableDirective.prototype.getDragEl = /**
  191. * @private
  192. * @return {?}
  193. */
  194. function () {
  195. return this.handle ? this.handle : this.el.nativeElement;
  196. };
  197. /**
  198. * @return {?}
  199. */
  200. AngularDraggableDirective.prototype.resetPosition = /**
  201. * @return {?}
  202. */
  203. function () {
  204. if (Position.isIPosition(this.position)) {
  205. this.oldTrans.set(this.position);
  206. }
  207. else {
  208. this.oldTrans.reset();
  209. }
  210. this.tempTrans.reset();
  211. this.transform();
  212. };
  213. /**
  214. * @private
  215. * @param {?} p
  216. * @return {?}
  217. */
  218. AngularDraggableDirective.prototype.moveTo = /**
  219. * @private
  220. * @param {?} p
  221. * @return {?}
  222. */
  223. function (p) {
  224. if (this.orignal) {
  225. p.subtract(this.orignal);
  226. this.tempTrans.set(p);
  227. this.tempTrans.divide(this.scale);
  228. this.transform();
  229. if (this.bounds) {
  230. this.edge.emit(this.boundsCheck());
  231. }
  232. this.movingOffset.emit(this.currTrans.value);
  233. }
  234. };
  235. /**
  236. * @private
  237. * @return {?}
  238. */
  239. AngularDraggableDirective.prototype.transform = /**
  240. * @private
  241. * @return {?}
  242. */
  243. function () {
  244. /** @type {?} */
  245. var translateX = this.tempTrans.x + this.oldTrans.x;
  246. /** @type {?} */
  247. var translateY = this.tempTrans.y + this.oldTrans.y;
  248. if (this.lockAxis === 'x') {
  249. translateX = this.oldTrans.x;
  250. this.tempTrans.x = 0;
  251. }
  252. else if (this.lockAxis === 'y') {
  253. translateY = this.oldTrans.y;
  254. this.tempTrans.y = 0;
  255. }
  256. // Snap to grid: by grid size
  257. if (this.gridSize > 1) {
  258. translateX = Math.round(translateX / this.gridSize) * this.gridSize;
  259. translateY = Math.round(translateY / this.gridSize) * this.gridSize;
  260. }
  261. /** @type {?} */
  262. var value = "translate(" + Math.round(translateX) + "px, " + Math.round(translateY) + "px)";
  263. this.renderer.setStyle(this.el.nativeElement, 'transform', value);
  264. this.renderer.setStyle(this.el.nativeElement, '-webkit-transform', value);
  265. this.renderer.setStyle(this.el.nativeElement, '-ms-transform', value);
  266. this.renderer.setStyle(this.el.nativeElement, '-moz-transform', value);
  267. this.renderer.setStyle(this.el.nativeElement, '-o-transform', value);
  268. // save current position
  269. this.currTrans.x = translateX;
  270. this.currTrans.y = translateY;
  271. };
  272. /**
  273. * @private
  274. * @return {?}
  275. */
  276. AngularDraggableDirective.prototype.pickUp = /**
  277. * @private
  278. * @return {?}
  279. */
  280. function () {
  281. // get old z-index:
  282. this.oldZIndex = this.el.nativeElement.style.zIndex ? this.el.nativeElement.style.zIndex : '';
  283. if (window) {
  284. this.oldZIndex = window.getComputedStyle(this.el.nativeElement, null).getPropertyValue('z-index');
  285. }
  286. if (this.zIndexMoving) {
  287. this.renderer.setStyle(this.el.nativeElement, 'z-index', this.zIndexMoving);
  288. }
  289. if (!this.moving) {
  290. this.started.emit(this.el.nativeElement);
  291. this.moving = true;
  292. /** @type {?} */
  293. var element = this.getDragEl();
  294. this.renderer.addClass(element, 'ng-dragging');
  295. /**
  296. * Fix performance issue:
  297. * https://github.com/xieziyu/angular2-draggable/issues/112
  298. */
  299. this.subscribeEvents();
  300. }
  301. };
  302. /**
  303. * @private
  304. * @return {?}
  305. */
  306. AngularDraggableDirective.prototype.subscribeEvents = /**
  307. * @private
  308. * @return {?}
  309. */
  310. function () {
  311. var _this = this;
  312. this.draggingSub = fromEvent(document, 'mousemove', { passive: false }).subscribe(function (event) { return _this.onMouseMove((/** @type {?} */ (event))); });
  313. this.draggingSub.add(fromEvent(document, 'touchmove', { passive: false }).subscribe(function (event) { return _this.onMouseMove((/** @type {?} */ (event))); }));
  314. this.draggingSub.add(fromEvent(document, 'mouseup', { passive: false }).subscribe(function () { return _this.putBack(); }));
  315. // checking if browser is IE or Edge - https://github.com/xieziyu/angular2-draggable/issues/153
  316. /** @type {?} */
  317. var isIEOrEdge = /msie\s|trident\//i.test(window.navigator.userAgent);
  318. if (!isIEOrEdge) {
  319. this.draggingSub.add(fromEvent(document, 'mouseleave', { passive: false }).subscribe(function () { return _this.putBack(); }));
  320. }
  321. this.draggingSub.add(fromEvent(document, 'touchend', { passive: false }).subscribe(function () { return _this.putBack(); }));
  322. this.draggingSub.add(fromEvent(document, 'touchcancel', { passive: false }).subscribe(function () { return _this.putBack(); }));
  323. };
  324. /**
  325. * @private
  326. * @return {?}
  327. */
  328. AngularDraggableDirective.prototype.unsubscribeEvents = /**
  329. * @private
  330. * @return {?}
  331. */
  332. function () {
  333. this.draggingSub.unsubscribe();
  334. this.draggingSub = null;
  335. };
  336. /**
  337. * @return {?}
  338. */
  339. AngularDraggableDirective.prototype.boundsCheck = /**
  340. * @return {?}
  341. */
  342. function () {
  343. if (this.bounds) {
  344. /** @type {?} */
  345. var boundary = this.bounds.getBoundingClientRect();
  346. /** @type {?} */
  347. var elem = this.el.nativeElement.getBoundingClientRect();
  348. /** @type {?} */
  349. var result = {
  350. 'top': this.outOfBounds.top ? true : boundary.top < elem.top,
  351. 'right': this.outOfBounds.right ? true : boundary.right > elem.right,
  352. 'bottom': this.outOfBounds.bottom ? true : boundary.bottom > elem.bottom,
  353. 'left': this.outOfBounds.left ? true : boundary.left < elem.left
  354. };
  355. if (this.inBounds) {
  356. if (!result.top) {
  357. this.tempTrans.y -= (elem.top - boundary.top) / this.scale;
  358. }
  359. if (!result.bottom) {
  360. this.tempTrans.y -= (elem.bottom - boundary.bottom) / this.scale;
  361. }
  362. if (!result.right) {
  363. this.tempTrans.x -= (elem.right - boundary.right) / this.scale;
  364. }
  365. if (!result.left) {
  366. this.tempTrans.x -= (elem.left - boundary.left) / this.scale;
  367. }
  368. this.transform();
  369. }
  370. return result;
  371. }
  372. };
  373. /** Get current offset */
  374. /**
  375. * Get current offset
  376. * @return {?}
  377. */
  378. AngularDraggableDirective.prototype.getCurrentOffset = /**
  379. * Get current offset
  380. * @return {?}
  381. */
  382. function () {
  383. return this.currTrans.value;
  384. };
  385. /**
  386. * @private
  387. * @return {?}
  388. */
  389. AngularDraggableDirective.prototype.putBack = /**
  390. * @private
  391. * @return {?}
  392. */
  393. function () {
  394. if (this._zIndex) {
  395. this.renderer.setStyle(this.el.nativeElement, 'z-index', this._zIndex);
  396. }
  397. else if (this.zIndexMoving) {
  398. if (this.oldZIndex) {
  399. this.renderer.setStyle(this.el.nativeElement, 'z-index', this.oldZIndex);
  400. }
  401. else {
  402. this.el.nativeElement.style.removeProperty('z-index');
  403. }
  404. }
  405. if (this.moving) {
  406. this.stopped.emit(this.el.nativeElement);
  407. // Remove the helper div:
  408. this._helperBlock.remove();
  409. if (this.needTransform) {
  410. if (Position.isIPosition(this.position)) {
  411. this.oldTrans.set(this.position);
  412. }
  413. else {
  414. this.oldTrans.reset();
  415. }
  416. this.transform();
  417. this.needTransform = false;
  418. }
  419. if (this.bounds) {
  420. this.edge.emit(this.boundsCheck());
  421. }
  422. this.moving = false;
  423. this.endOffset.emit(this.currTrans.value);
  424. if (this.trackPosition) {
  425. this.oldTrans.add(this.tempTrans);
  426. }
  427. this.tempTrans.reset();
  428. if (!this.trackPosition) {
  429. this.transform();
  430. }
  431. /** @type {?} */
  432. var element = this.getDragEl();
  433. this.renderer.removeClass(element, 'ng-dragging');
  434. /**
  435. * Fix performance issue:
  436. * https://github.com/xieziyu/angular2-draggable/issues/112
  437. */
  438. this.unsubscribeEvents();
  439. }
  440. };
  441. /**
  442. * @param {?} target
  443. * @param {?} element
  444. * @return {?}
  445. */
  446. AngularDraggableDirective.prototype.checkHandleTarget = /**
  447. * @param {?} target
  448. * @param {?} element
  449. * @return {?}
  450. */
  451. function (target, element) {
  452. // Checks if the target is the element clicked, then checks each child element of element as well
  453. // Ignores button clicks
  454. // Ignore elements of type button
  455. if (element.tagName === 'BUTTON') {
  456. return false;
  457. }
  458. // If the target was found, return true (handle was found)
  459. if (element === target) {
  460. return true;
  461. }
  462. // Recursively iterate this elements children
  463. for (var child in element.children) {
  464. if (element.children.hasOwnProperty(child)) {
  465. if (this.checkHandleTarget(target, element.children[child])) {
  466. return true;
  467. }
  468. }
  469. }
  470. // Handle was not found in this lineage
  471. // Note: return false is ignore unless it is the parent element
  472. return false;
  473. };
  474. /**
  475. * @param {?} event
  476. * @return {?}
  477. */
  478. AngularDraggableDirective.prototype.onMouseDown = /**
  479. * @param {?} event
  480. * @return {?}
  481. */
  482. function (event) {
  483. // 1. skip right click;
  484. if (event instanceof MouseEvent && event.button === 2) {
  485. return;
  486. }
  487. // 2. if handle is set, the element can only be moved by handle
  488. /** @type {?} */
  489. var target = event.target || event.srcElement;
  490. if (this.handle !== undefined && !this.checkHandleTarget(target, this.handle)) {
  491. return;
  492. }
  493. // 3. if allow drag is set to false, ignore the mousedown
  494. if (this.allowDrag === false) {
  495. return;
  496. }
  497. if (this.preventDefaultEvent) {
  498. event.stopPropagation();
  499. event.preventDefault();
  500. }
  501. this.orignal = Position.fromEvent(event, this.getDragEl());
  502. this.pickUp();
  503. };
  504. /**
  505. * @param {?} event
  506. * @return {?}
  507. */
  508. AngularDraggableDirective.prototype.onMouseMove = /**
  509. * @param {?} event
  510. * @return {?}
  511. */
  512. function (event) {
  513. if (this.moving && this.allowDrag) {
  514. if (this.preventDefaultEvent) {
  515. event.stopPropagation();
  516. event.preventDefault();
  517. }
  518. // Add a transparent helper div:
  519. this._helperBlock.add();
  520. this.moveTo(Position.fromEvent(event, this.getDragEl()));
  521. }
  522. };
  523. AngularDraggableDirective.decorators = [
  524. { type: Directive, args: [{
  525. selector: '[ngDraggable]',
  526. exportAs: 'ngDraggable'
  527. },] }
  528. ];
  529. /** @nocollapse */
  530. AngularDraggableDirective.ctorParameters = function () { return [
  531. { type: ElementRef },
  532. { type: Renderer2 }
  533. ]; };
  534. AngularDraggableDirective.propDecorators = {
  535. started: [{ type: Output }],
  536. stopped: [{ type: Output }],
  537. edge: [{ type: Output }],
  538. handle: [{ type: Input }],
  539. bounds: [{ type: Input }],
  540. outOfBounds: [{ type: Input }],
  541. gridSize: [{ type: Input }],
  542. zIndexMoving: [{ type: Input }],
  543. zIndex: [{ type: Input }],
  544. inBounds: [{ type: Input }],
  545. trackPosition: [{ type: Input }],
  546. scale: [{ type: Input }],
  547. preventDefaultEvent: [{ type: Input }],
  548. position: [{ type: Input }],
  549. lockAxis: [{ type: Input }],
  550. movingOffset: [{ type: Output }],
  551. endOffset: [{ type: Output }],
  552. ngDraggable: [{ type: Input }],
  553. onMouseDown: [{ type: HostListener, args: ['mousedown', ['$event'],] }, { type: HostListener, args: ['touchstart', ['$event'],] }]
  554. };
  555. return AngularDraggableDirective;
  556. }());
  557. export { AngularDraggableDirective };
  558. if (false) {
  559. /**
  560. * @type {?}
  561. * @private
  562. */
  563. AngularDraggableDirective.prototype.allowDrag;
  564. /**
  565. * @type {?}
  566. * @private
  567. */
  568. AngularDraggableDirective.prototype.moving;
  569. /**
  570. * @type {?}
  571. * @private
  572. */
  573. AngularDraggableDirective.prototype.orignal;
  574. /**
  575. * @type {?}
  576. * @private
  577. */
  578. AngularDraggableDirective.prototype.oldTrans;
  579. /**
  580. * @type {?}
  581. * @private
  582. */
  583. AngularDraggableDirective.prototype.tempTrans;
  584. /**
  585. * @type {?}
  586. * @private
  587. */
  588. AngularDraggableDirective.prototype.currTrans;
  589. /**
  590. * @type {?}
  591. * @private
  592. */
  593. AngularDraggableDirective.prototype.oldZIndex;
  594. /**
  595. * @type {?}
  596. * @private
  597. */
  598. AngularDraggableDirective.prototype._zIndex;
  599. /**
  600. * @type {?}
  601. * @private
  602. */
  603. AngularDraggableDirective.prototype.needTransform;
  604. /**
  605. * @type {?}
  606. * @private
  607. */
  608. AngularDraggableDirective.prototype.draggingSub;
  609. /**
  610. * Bugfix: iFrames, and context unrelated elements block all events, and are unusable
  611. * https://github.com/xieziyu/angular2-draggable/issues/84
  612. * @type {?}
  613. * @private
  614. */
  615. AngularDraggableDirective.prototype._helperBlock;
  616. /** @type {?} */
  617. AngularDraggableDirective.prototype.started;
  618. /** @type {?} */
  619. AngularDraggableDirective.prototype.stopped;
  620. /** @type {?} */
  621. AngularDraggableDirective.prototype.edge;
  622. /**
  623. * Make the handle HTMLElement draggable
  624. * @type {?}
  625. */
  626. AngularDraggableDirective.prototype.handle;
  627. /**
  628. * Set the bounds HTMLElement
  629. * @type {?}
  630. */
  631. AngularDraggableDirective.prototype.bounds;
  632. /**
  633. * List of allowed out of bounds edges *
  634. * @type {?}
  635. */
  636. AngularDraggableDirective.prototype.outOfBounds;
  637. /**
  638. * Round the position to nearest grid
  639. * @type {?}
  640. */
  641. AngularDraggableDirective.prototype.gridSize;
  642. /**
  643. * Set z-index when dragging
  644. * @type {?}
  645. */
  646. AngularDraggableDirective.prototype.zIndexMoving;
  647. /**
  648. * Whether to limit the element stay in the bounds
  649. * @type {?}
  650. */
  651. AngularDraggableDirective.prototype.inBounds;
  652. /**
  653. * Whether the element should use it's previous drag position on a new drag event.
  654. * @type {?}
  655. */
  656. AngularDraggableDirective.prototype.trackPosition;
  657. /**
  658. * Input css scale transform of element so translations are correct
  659. * @type {?}
  660. */
  661. AngularDraggableDirective.prototype.scale;
  662. /**
  663. * Whether to prevent default event
  664. * @type {?}
  665. */
  666. AngularDraggableDirective.prototype.preventDefaultEvent;
  667. /**
  668. * Set initial position by offsets
  669. * @type {?}
  670. */
  671. AngularDraggableDirective.prototype.position;
  672. /**
  673. * Lock axis: 'x' or 'y'
  674. * @type {?}
  675. */
  676. AngularDraggableDirective.prototype.lockAxis;
  677. /**
  678. * Emit position offsets when moving
  679. * @type {?}
  680. */
  681. AngularDraggableDirective.prototype.movingOffset;
  682. /**
  683. * Emit position offsets when put back
  684. * @type {?}
  685. */
  686. AngularDraggableDirective.prototype.endOffset;
  687. /**
  688. * @type {?}
  689. * @private
  690. */
  691. AngularDraggableDirective.prototype.el;
  692. /**
  693. * @type {?}
  694. * @private
  695. */
  696. AngularDraggableDirective.prototype.renderer;
  697. }
  698. //# 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{\n  Directive, ElementRef, Renderer2,\n  Input, Output, OnInit, HostListener,\n  EventEmitter, OnChanges, SimpleChanges, OnDestroy, AfterViewInit\n} from '@angular/core';\n\nimport { Subscription, fromEvent } from 'rxjs';\nimport { IPosition, Position } from './models/position';\nimport { HelperBlock } from './widgets/helper-block';\n\n@Directive({\n  selector: '[ngDraggable]',\n  exportAs: 'ngDraggable'\n})\nexport class AngularDraggableDirective implements OnInit, OnDestroy, OnChanges, AfterViewInit {\n  private allowDrag = true;\n  private moving = false;\n  private orignal: Position = null;\n  private oldTrans = new Position(0, 0);\n  private tempTrans = new Position(0, 0);\n  private currTrans = new Position(0, 0);\n  private oldZIndex = '';\n  private _zIndex = '';\n  private needTransform = false;\n\n  private draggingSub: Subscription = null;\n\n  /**\n   * Bugfix: iFrames, and context unrelated elements block all events, and are unusable\n   * https://github.com/xieziyu/angular2-draggable/issues/84\n   */\n  private _helperBlock: HelperBlock = null;\n\n  @Output() started = new EventEmitter<any>();\n  @Output() stopped = new EventEmitter<any>();\n  @Output() edge = new EventEmitter<any>();\n\n  /** Make the handle HTMLElement draggable */\n  @Input() handle: HTMLElement;\n\n  /** Set the bounds HTMLElement */\n  @Input() bounds: HTMLElement;\n\n  /** List of allowed out of bounds edges **/\n  @Input() outOfBounds = {\n    top: false,\n    right: false,\n    bottom: false,\n    left: false\n  };\n\n  /** Round the position to nearest grid */\n  @Input() gridSize = 1;\n\n  /** Set z-index when dragging */\n  @Input() zIndexMoving: string;\n\n  /** Set z-index when not dragging */\n  @Input() set zIndex(setting: string) {\n    this.renderer.setStyle(this.el.nativeElement, 'z-index', setting);\n    this._zIndex = setting;\n  }\n  /** Whether to limit the element stay in the bounds */\n  @Input() inBounds = false;\n\n  /** Whether the element should use it's previous drag position on a new drag event. */\n  @Input() trackPosition = true;\n\n  /** Input css scale transform of element so translations are correct */\n  @Input() scale = 1;\n\n  /** Whether to prevent default event */\n  @Input() preventDefaultEvent = false;\n\n  /** Set initial position by offsets */\n  @Input() position: IPosition = { x: 0, y: 0 };\n\n  /** Lock axis: 'x' or 'y' */\n  @Input() lockAxis: string = null;\n\n  /** Emit position offsets when moving */\n  @Output() movingOffset = new EventEmitter<IPosition>();\n\n  /** Emit position offsets when put back */\n  @Output() endOffset = new EventEmitter<IPosition>();\n\n  @Input()\n  set ngDraggable(setting: any) {\n    if (setting !== undefined && setting !== null && setting !== '') {\n      this.allowDrag = !!setting;\n\n      let element = this.getDragEl();\n\n      if (this.allowDrag) {\n        this.renderer.addClass(element, 'ng-draggable');\n      } else {\n        this.putBack();\n        this.renderer.removeClass(element, 'ng-draggable');\n      }\n    }\n  }\n\n  constructor(private el: ElementRef, private renderer: Renderer2) {\n    this._helperBlock = new HelperBlock(el.nativeElement, renderer);\n  }\n\n  ngOnInit() {\n    if (this.allowDrag) {\n      let element = this.getDragEl();\n      this.renderer.addClass(element, 'ng-draggable');\n    }\n    this.resetPosition();\n  }\n\n  ngOnDestroy() {\n    this.bounds = null;\n    this.handle = null;\n    this.orignal = null;\n    this.oldTrans = null;\n    this.tempTrans = null;\n    this.currTrans = null;\n    this._helperBlock.dispose();\n    this._helperBlock = null;\n\n    if (this.draggingSub) {\n      this.draggingSub.unsubscribe();\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes['position'] && !changes['position'].isFirstChange()) {\n      let p = changes['position'].currentValue;\n\n      if (!this.moving) {\n        if (Position.isIPosition(p)) {\n          this.oldTrans.set(p);\n        } else {\n          this.oldTrans.reset();\n        }\n\n        this.transform();\n      } else {\n        this.needTransform = true;\n      }\n    }\n  }\n\n  ngAfterViewInit() {\n    if (this.inBounds) {\n      this.boundsCheck();\n      this.oldTrans.add(this.tempTrans);\n      this.tempTrans.reset();\n    }\n  }\n\n  private getDragEl() {\n    return this.handle ? this.handle : this.el.nativeElement;\n  }\n\n  resetPosition() {\n    if (Position.isIPosition(this.position)) {\n      this.oldTrans.set(this.position);\n    } else {\n      this.oldTrans.reset();\n    }\n    this.tempTrans.reset();\n    this.transform();\n  }\n\n  private moveTo(p: Position) {\n    if (this.orignal) {\n      p.subtract(this.orignal);\n      this.tempTrans.set(p);\n      this.tempTrans.divide(this.scale);\n      this.transform();\n\n      if (this.bounds) {\n        this.edge.emit(this.boundsCheck());\n      }\n\n      this.movingOffset.emit(this.currTrans.value);\n    }\n  }\n\n  private transform() {\n    let translateX = this.tempTrans.x + this.oldTrans.x;\n    let translateY = this.tempTrans.y + this.oldTrans.y;\n\n    if (this.lockAxis === 'x') {\n      translateX = this.oldTrans.x;\n      this.tempTrans.x = 0;\n    } else if (this.lockAxis === 'y') {\n      translateY = this.oldTrans.y;\n      this.tempTrans.y = 0;\n    }\n\n    // Snap to grid: by grid size\n    if (this.gridSize > 1) {\n      translateX = Math.round(translateX / this.gridSize) * this.gridSize;\n      translateY = Math.round(translateY / this.gridSize) * this.gridSize;\n    }\n\n    let value = `translate(${ Math.round(translateX) }px, ${ Math.round(translateY) }px)`;\n\n    this.renderer.setStyle(this.el.nativeElement, 'transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-webkit-transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-ms-transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-moz-transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-o-transform', value);\n\n    // save current position\n    this.currTrans.x = translateX;\n    this.currTrans.y = translateY;\n  }\n\n  private pickUp() {\n    // get old z-index:\n    this.oldZIndex = this.el.nativeElement.style.zIndex ? this.el.nativeElement.style.zIndex : '';\n\n    if (window) {\n      this.oldZIndex = window.getComputedStyle(this.el.nativeElement, null).getPropertyValue('z-index');\n    }\n\n    if (this.zIndexMoving) {\n      this.renderer.setStyle(this.el.nativeElement, 'z-index', this.zIndexMoving);\n    }\n\n    if (!this.moving) {\n      this.started.emit(this.el.nativeElement);\n      this.moving = true;\n\n      const element = this.getDragEl();\n      this.renderer.addClass(element, 'ng-dragging');\n\n      /**\n       * Fix performance issue:\n       * https://github.com/xieziyu/angular2-draggable/issues/112\n       */\n      this.subscribeEvents();\n    }\n  }\n\n  private subscribeEvents() {\n    this.draggingSub = fromEvent(document, 'mousemove', { passive: false }).subscribe(event => this.onMouseMove(event as MouseEvent));\n    this.draggingSub.add(fromEvent(document, 'touchmove', { passive: false }).subscribe(event => this.onMouseMove(event as TouchEvent)));\n    this.draggingSub.add(fromEvent(document, 'mouseup', { passive: false }).subscribe(() => this.putBack()));\n    // checking if browser is IE or Edge - https://github.com/xieziyu/angular2-draggable/issues/153\n    let isIEOrEdge = /msie\\s|trident\\//i.test(window.navigator.userAgent);\n    if (!isIEOrEdge) {\n      this.draggingSub.add(fromEvent(document, 'mouseleave', {passive: false}).subscribe(() => this.putBack()));\n    }\n    this.draggingSub.add(fromEvent(document, 'touchend', { passive: false }).subscribe(() => this.putBack()));\n    this.draggingSub.add(fromEvent(document, 'touchcancel', { passive: false }).subscribe(() => this.putBack()));\n  }\n\n  private unsubscribeEvents() {\n    this.draggingSub.unsubscribe();\n    this.draggingSub = null;\n  }\n\n  boundsCheck() {\n    if (this.bounds) {\n      let boundary = this.bounds.getBoundingClientRect();\n      let elem = this.el.nativeElement.getBoundingClientRect();\n      let result = {\n        'top': this.outOfBounds.top ? true : boundary.top < elem.top,\n        'right': this.outOfBounds.right ? true : boundary.right > elem.right,\n        'bottom': this.outOfBounds.bottom ? true : boundary.bottom > elem.bottom,\n        'left': this.outOfBounds.left ? true : boundary.left < elem.left\n      };\n\n      if (this.inBounds) {\n        if (!result.top) {\n          this.tempTrans.y -= (elem.top - boundary.top) / this.scale;\n        }\n\n        if (!result.bottom) {\n          this.tempTrans.y -= (elem.bottom - boundary.bottom) / this.scale;\n        }\n\n        if (!result.right) {\n          this.tempTrans.x -= (elem.right - boundary.right) / this.scale;\n        }\n\n        if (!result.left) {\n          this.tempTrans.x -= (elem.left - boundary.left) / this.scale;\n        }\n\n        this.transform();\n      }\n\n      return result;\n    }\n  }\n\n  /** Get current offset */\n  getCurrentOffset() {\n    return this.currTrans.value;\n  }\n\n  private putBack() {\n    if (this._zIndex) {\n      this.renderer.setStyle(this.el.nativeElement, 'z-index', this._zIndex);\n    } else if (this.zIndexMoving) {\n      if (this.oldZIndex) {\n        this.renderer.setStyle(this.el.nativeElement, 'z-index', this.oldZIndex);\n      } else {\n        this.el.nativeElement.style.removeProperty('z-index');\n      }\n    }\n\n    if (this.moving) {\n      this.stopped.emit(this.el.nativeElement);\n\n      // Remove the helper div:\n      this._helperBlock.remove();\n\n      if (this.needTransform) {\n        if (Position.isIPosition(this.position)) {\n          this.oldTrans.set(this.position);\n        } else {\n          this.oldTrans.reset();\n        }\n\n        this.transform();\n        this.needTransform = false;\n      }\n\n      if (this.bounds) {\n        this.edge.emit(this.boundsCheck());\n      }\n\n      this.moving = false;\n      this.endOffset.emit(this.currTrans.value);\n\n      if (this.trackPosition) {\n        this.oldTrans.add(this.tempTrans);\n      }\n\n      this.tempTrans.reset();\n\n      if (!this.trackPosition) {\n        this.transform();\n      }\n\n      const element = this.getDragEl();\n      this.renderer.removeClass(element, 'ng-dragging');\n\n      /**\n       * Fix performance issue:\n       * https://github.com/xieziyu/angular2-draggable/issues/112\n       */\n      this.unsubscribeEvents();\n    }\n  }\n\n  checkHandleTarget(target: EventTarget, element: Element) {\n    // Checks if the target is the element clicked, then checks each child element of element as well\n    // Ignores button clicks\n\n    // Ignore elements of type button\n    if (element.tagName === 'BUTTON') {\n      return false;\n    }\n\n    // If the target was found, return true (handle was found)\n    if (element === target) {\n      return true;\n    }\n\n    // Recursively iterate this elements children\n    for (let child in element.children) {\n      if (element.children.hasOwnProperty(child)) {\n        if (this.checkHandleTarget(target, element.children[child])) {\n          return true;\n        }\n      }\n    }\n\n    // Handle was not found in this lineage\n    // Note: return false is ignore unless it is the parent element\n    return false;\n  }\n\n  @HostListener('mousedown', ['$event'])\n  @HostListener('touchstart', ['$event'])\n  onMouseDown(event: MouseEvent | TouchEvent) {\n    // 1. skip right click;\n    if (event instanceof MouseEvent && event.button === 2) {\n      return;\n    }\n    // 2. if handle is set, the element can only be moved by handle\n    let target = event.target || event.srcElement;\n    if (this.handle !== undefined && !this.checkHandleTarget(target, this.handle)) {\n      return;\n    }\n\n    // 3. if allow drag is set to false, ignore the mousedown\n    if (this.allowDrag === false) {\n      return;\n    }\n\n    if (this.preventDefaultEvent) {\n      event.stopPropagation();\n      event.preventDefault();\n    }\n\n    this.orignal = Position.fromEvent(event, this.getDragEl());\n    this.pickUp();\n  }\n\n  onMouseMove(event: MouseEvent | TouchEvent) {\n    if (this.moving && this.allowDrag) {\n      if (this.preventDefaultEvent) {\n        event.stopPropagation();\n        event.preventDefault();\n      }\n\n      // Add a transparent helper div:\n      this._helperBlock.add();\n      this.moveTo(Position.fromEvent(event, this.getDragEl()));\n    }\n  }\n}\n"]}