@angular/cdk
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Angular Material Component Development Kit
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JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/cdk/platform'), require('@angular/cdk/coercion'), require('rxjs'), require('@angular/core'), require('@angular/common'), require('@angular/cdk/scrolling'), require('@angular/cdk/bidi'), require('rxjs/operators')) :
typeof define === 'function' && define.amd ? define('@angular/cdk/drag-drop', ['exports', '@angular/cdk/platform', '@angular/cdk/coercion', 'rxjs', '@angular/core', '@angular/common', '@angular/cdk/scrolling', '@angular/cdk/bidi', 'rxjs/operators'], factory) :
(factory((global.ng = global.ng || {}, global.ng.cdk = global.ng.cdk || {}, global.ng.cdk.dragDrop = {}),global.ng.cdk.platform,global.ng.cdk.coercion,global.rxjs,global.ng.core,global.ng.common,global.ng.cdk.scrolling,global.ng.cdk.bidi,global.rxjs.operators));
}(this, (function (exports,platform,coercion,rxjs,core,common,scrolling,bidi,operators) { 'use strict';
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* Shallow-extends a stylesheet object with another stylesheet object.
* \@docs-private
* @param {?} dest
* @param {?} source
* @return {?}
*/
function extendStyles(dest, source) {
for (var key in source) {
if (source.hasOwnProperty(key)) {
dest[(/** @type {?} */ (key))] = source[(/** @type {?} */ (key))];
}
}
return dest;
}
/**
* Toggles whether the native drag interactions should be enabled for an element.
* \@docs-private
* @param {?} element Element on which to toggle the drag interactions.
* @param {?} enable Whether the drag interactions should be enabled.
* @return {?}
*/
function toggleNativeDragInteractions(element, enable) {
/** @type {?} */
var userSelect = enable ? '' : 'none';
extendStyles(element.style, {
touchAction: enable ? '' : 'none',
webkitUserDrag: enable ? '' : 'none',
webkitTapHighlightColor: enable ? '' : 'transparent',
userSelect: userSelect,
msUserSelect: userSelect,
webkitUserSelect: userSelect,
MozUserSelect: userSelect
});
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* Parses a CSS time value to milliseconds.
* @param {?} value
* @return {?}
*/
function parseCssTimeUnitsToMs(value) {
// Some browsers will return it in seconds, whereas others will return milliseconds.
/** @type {?} */
var multiplier = value.toLowerCase().indexOf('ms') > -1 ? 1 : 1000;
return parseFloat(value) * multiplier;
}
/**
* Gets the transform transition duration, including the delay, of an element in milliseconds.
* @param {?} element
* @return {?}
*/
function getTransformTransitionDurationInMs(element) {
/** @type {?} */
var computedStyle = getComputedStyle(element);
/** @type {?} */
var transitionedProperties = parseCssPropertyValue(computedStyle, 'transition-property');
/** @type {?} */
var property = transitionedProperties.find(function (prop) { return prop === 'transform' || prop === 'all'; });
// If there's no transition for `all` or `transform`, we shouldn't do anything.
if (!property) {
return 0;
}
// Get the index of the property that we're interested in and match
// it up to the same index in `transition-delay` and `transition-duration`.
/** @type {?} */
var propertyIndex = transitionedProperties.indexOf(property);
/** @type {?} */
var rawDurations = parseCssPropertyValue(computedStyle, 'transition-duration');
/** @type {?} */
var rawDelays = parseCssPropertyValue(computedStyle, 'transition-delay');
return parseCssTimeUnitsToMs(rawDurations[propertyIndex]) +
parseCssTimeUnitsToMs(rawDelays[propertyIndex]);
}
/**
* Parses out multiple values from a computed style into an array.
* @param {?} computedStyle
* @param {?} name
* @return {?}
*/
function parseCssPropertyValue(computedStyle, name) {
/** @type {?} */
var value = computedStyle.getPropertyValue(name);
return value.split(',').map(function (part) { return part.trim(); });
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* Options that can be used to bind a passive event listener.
* @type {?}
*/
var passiveEventListenerOptions = platform.normalizePassiveListenerOptions({ passive: true });
/**
* Options that can be used to bind an active event listener.
* @type {?}
*/
var activeEventListenerOptions = platform.normalizePassiveListenerOptions({ passive: false });
/**
* Time in milliseconds for which to ignore mouse events, after
* receiving a touch event. Used to avoid doing double work for
* touch devices where the browser fires fake mouse events, in
* addition to touch events.
* @type {?}
*/
var MOUSE_EVENT_IGNORE_TIME = 800;
/**
* Reference to a draggable item. Used to manipulate or dispose of the item.
* \@docs-private
* @template T
*/
var /**
* Reference to a draggable item. Used to manipulate or dispose of the item.
* \@docs-private
* @template T
*/
DragRef = /** @class */ (function () {
function DragRef(element, _config, _document, _ngZone, _viewportRuler, _dragDropRegistry) {
var _this = this;
this._config = _config;
this._document = _document;
this._ngZone = _ngZone;
this._viewportRuler = _viewportRuler;
this._dragDropRegistry = _dragDropRegistry;
/**
* CSS `transform` applied to the element when it isn't being dragged. We need a
* passive transform in order for the dragged element to retain its new position
* after the user has stopped dragging and because we need to know the relative
* position in case they start dragging again. This corresponds to `element.style.transform`.
*/
this._passiveTransform = { x: 0, y: 0 };
/**
* CSS `transform` that is applied to the element while it's being dragged.
*/
this._activeTransform = { x: 0, y: 0 };
/**
* Emits when the item is being moved.
*/
this._moveEvents = new rxjs.Subject();
/**
* Amount of subscriptions to the move event. Used to avoid
* hitting the zone if the consumer didn't subscribe to it.
*/
this._moveEventSubscriptions = 0;
/**
* Subscription to pointer movement events.
*/
this._pointerMoveSubscription = rxjs.Subscription.EMPTY;
/**
* Subscription to the event that is dispatched when the user lifts their pointer.
*/
this._pointerUpSubscription = rxjs.Subscription.EMPTY;
/**
* Cached reference to the boundary element.
*/
this._boundaryElement = null;
/**
* Whether the native dragging interactions have been enabled on the root element.
*/
this._nativeInteractionsEnabled = true;
/**
* Elements that can be used to drag the draggable item.
*/
this._handles = [];
/**
* Registered handles that are currently disabled.
*/
this._disabledHandles = new Set();
/**
* Layout direction of the item.
*/
this._direction = 'ltr';
this._disabled = false;
/**
* Emits as the drag sequence is being prepared.
*/
this.beforeStarted = new rxjs.Subject();
/**
* Emits when the user starts dragging the item.
*/
this.started = new rxjs.Subject();
/**
* Emits when the user has released a drag item, before any animations have started.
*/
this.released = new rxjs.Subject();
/**
* Emits when the user stops dragging an item in the container.
*/
this.ended = new rxjs.Subject();
/**
* Emits when the user has moved the item into a new container.
*/
this.entered = new rxjs.Subject();
/**
* Emits when the user removes the item its container by dragging it into another container.
*/
this.exited = new rxjs.Subject();
/**
* Emits when the user drops the item inside a container.
*/
this.dropped = new rxjs.Subject();
/**
* Emits as the user is dragging the item. Use with caution,
* because this event will fire for every pixel that the user has dragged.
*/
this.moved = new rxjs.Observable(function (observer) {
/** @type {?} */
var subscription = _this._moveEvents.subscribe(observer);
_this._moveEventSubscriptions++;
return function () {
subscription.unsubscribe();
_this._moveEventSubscriptions--;
};
});
/**
* Handler for the `mousedown`/`touchstart` events.
*/
this._pointerDown = function (event) {
_this.beforeStarted.next();
// Delegate the event based on whether it started from a handle or the element itself.
if (_this._handles.length) {
/** @type {?} */
var targetHandle = _this._handles.find(function (handle) {
/** @type {?} */
var target = event.target;
return !!target && (target === handle || handle.contains((/** @type {?} */ (target))));
});
if (targetHandle && !_this._disabledHandles.has(targetHandle) && !_this.disabled) {
_this._initializeDragSequence(targetHandle, event);
}
}
else if (!_this.disabled) {
_this._initializeDragSequence(_this._rootElement, event);
}
};
/**
* Handler that is invoked when the user moves their pointer after they've initiated a drag.
*/
this._pointerMove = function (event) {
if (!_this._hasStartedDragging) {
/** @type {?} */
var pointerPosition = _this._getPointerPositionOnPage(event);
/** @type {?} */
var distanceX = Math.abs(pointerPosition.x - _this._pickupPositionOnPage.x);
/** @type {?} */
var distanceY = Math.abs(pointerPosition.y - _this._pickupPositionOnPage.y);
// Only start dragging after the user has moved more than the minimum distance in either
// direction. Note that this is preferrable over doing something like `skip(minimumDistance)`
// in the `pointerMove` subscription, because we're not guaranteed to have one move event
// per pixel of movement (e.g. if the user moves their pointer quickly).
if (distanceX + distanceY >= _this._config.dragStartThreshold) {
_this._hasStartedDragging = true;
_this._ngZone.run(function () { return _this._startDragSequence(event); });
}
return;
}
// We only need the preview dimensions if we have a boundary element.
if (_this._boundaryElement) {
// Cache the preview element rect if we haven't cached it already or if
// we cached it too early before the element dimensions were computed.
if (!_this._previewRect || (!_this._previewRect.width && !_this._previewRect.height)) {
_this._previewRect = (_this._preview || _this._rootElement).getBoundingClientRect();
}
}
/** @type {?} */
var constrainedPointerPosition = _this._getConstrainedPointerPosition(event);
_this._hasMoved = true;
event.preventDefault();
_this._updatePointerDirectionDelta(constrainedPointerPosition);
if (_this._dropContainer) {
_this._updateActiveDropContainer(constrainedPointerPosition);
}
else {
/** @type {?} */
var activeTransform = _this._activeTransform;
activeTransform.x =
constrainedPointerPosition.x - _this._pickupPositionOnPage.x + _this._passiveTransform.x;
activeTransform.y =
constrainedPointerPosition.y - _this._pickupPositionOnPage.y + _this._passiveTransform.y;
/** @type {?} */
var transform = getTransform(activeTransform.x, activeTransform.y);
// Preserve the previous `transform` value, if there was one. Note that we apply our own
// transform before the user's, because things like rotation can affect which direction
// the element will be translated towards.
_this._rootElement.style.transform = _this._initialTransform ?
transform + ' ' + _this._initialTransform : transform;
// Apply transform as attribute if dragging and svg element to work for IE
if (typeof SVGElement !== 'undefined' && _this._rootElement instanceof SVGElement) {
/** @type {?} */
var appliedTransform = "translate(" + activeTransform.x + " " + activeTransform.y + ")";
_this._rootElement.setAttribute('transform', appliedTransform);
}
}
// Since this event gets fired for every pixel while dragging, we only
// want to fire it if the consumer opted into it. Also we have to
// re-enter the zone because we run all of the events on the outside.
if (_this._moveEventSubscriptions > 0) {
_this._ngZone.run(function () {
_this._moveEvents.next({
source: _this,
pointerPosition: constrainedPointerPosition,
event: event,
delta: _this._pointerDirectionDelta
});
});
}
};
/**
* Handler that is invoked when the user lifts their pointer up, after initiating a drag.
*/
this._pointerUp = function (event) {
// Note that here we use `isDragging` from the service, rather than from `this`.
// The difference is that the one from the service reflects whether a dragging sequence
// has been initiated, whereas the one on `this` includes whether the user has passed
// the minimum dragging threshold.
if (!_this._dragDropRegistry.isDragging(_this)) {
return;
}
_this._removeSubscriptions();
_this._dragDropRegistry.stopDragging(_this);
if (_this._handles) {
_this._rootElement.style.webkitTapHighlightColor = _this._rootElementTapHighlight;
}
if (!_this._hasStartedDragging) {
return;
}
_this.released.next({ source: _this });
if (!_this._dropContainer) {
// Convert the active transform into a passive one. This means that next time
// the user starts dragging the item, its position will be calculated relatively
// to the new passive transform.
_this._passiveTransform.x = _this._activeTransform.x;
_this._passiveTransform.y = _this._activeTransform.y;
_this._ngZone.run(function () { return _this.ended.next({ source: _this }); });
_this._dragDropRegistry.stopDragging(_this);
return;
}
_this._animatePreviewToPlaceholder().then(function () {
_this._cleanupDragArtifacts(event);
_this._dragDropRegistry.stopDragging(_this);
});
};
this.withRootElement(element);
_dragDropRegistry.registerDragItem(this);
}
Object.defineProperty(DragRef.prototype, "disabled", {
/** Whether starting to drag this element is disabled. */
get: /**
* Whether starting to drag this element is disabled.
* @return {?}
*/
function () {
return this._disabled || !!(this._dropContainer && this._dropContainer.disabled);
},
set: /**
* @param {?} value
* @return {?}
*/
function (value) {
/** @type {?} */
var newValue = coercion.coerceBooleanProperty(value);
if (newValue !== this._disabled) {
this._disabled = newValue;
this._toggleNativeDragInteractions();
}
},
enumerable: true,
configurable: true
});
/**
* Returns the element that is being used as a placeholder
* while the current element is being dragged.
*/
/**
* Returns the element that is being used as a placeholder
* while the current element is being dragged.
* @return {?}
*/
DragRef.prototype.getPlaceholderElement = /**
* Returns the element that is being used as a placeholder
* while the current element is being dragged.
* @return {?}
*/
function () {
return this._placeholder;
};
/** Returns the root draggable element. */
/**
* Returns the root draggable element.
* @return {?}
*/
DragRef.prototype.getRootElement = /**
* Returns the root draggable element.
* @return {?}
*/
function () {
return this._rootElement;
};
/** Registers the handles that can be used to drag the element. */
/**
* Registers the handles that can be used to drag the element.
* @template THIS
* @this {THIS}
* @param {?} handles
* @return {THIS}
*/
DragRef.prototype.withHandles = /**
* Registers the handles that can be used to drag the element.
* @template THIS
* @this {THIS}
* @param {?} handles
* @return {THIS}
*/
function (handles) {
(/** @type {?} */ (this))._handles = handles.map(function (handle) { return coercion.coerceElement(handle); });
(/** @type {?} */ (this))._handles.forEach(function (handle) { return toggleNativeDragInteractions(handle, false); });
(/** @type {?} */ (this))._toggleNativeDragInteractions();
return (/** @type {?} */ (this));
};
/**
* Registers the template that should be used for the drag preview.
* @param template Template that from which to stamp out the preview.
*/
/**
* Registers the template that should be used for the drag preview.
* @template THIS
* @this {THIS}
* @param {?} template Template that from which to stamp out the preview.
* @return {THIS}
*/
DragRef.prototype.withPreviewTemplate = /**
* Registers the template that should be used for the drag preview.
* @template THIS
* @this {THIS}
* @param {?} template Template that from which to stamp out the preview.
* @return {THIS}
*/
function (template) {
(/** @type {?} */ (this))._previewTemplate = template;
return (/** @type {?} */ (this));
};
/**
* Registers the template that should be used for the drag placeholder.
* @param template Template that from which to stamp out the placeholder.
*/
/**
* Registers the template that should be used for the drag placeholder.
* @template THIS
* @this {THIS}
* @param {?} template Template that from which to stamp out the placeholder.
* @return {THIS}
*/
DragRef.prototype.withPlaceholderTemplate = /**
* Registers the template that should be used for the drag placeholder.
* @template THIS
* @this {THIS}
* @param {?} template Template that from which to stamp out the placeholder.
* @return {THIS}
*/
function (template) {
(/** @type {?} */ (this))._placeholderTemplate = template;
return (/** @type {?} */ (this));
};
/**
* Sets an alternate drag root element. The root element is the element that will be moved as
* the user is dragging. Passing an alternate root element is useful when trying to enable
* dragging on an element that you might not have access to.
*/
/**
* Sets an alternate drag root element. The root element is the element that will be moved as
* the user is dragging. Passing an alternate root element is useful when trying to enable
* dragging on an element that you might not have access to.
* @template THIS
* @this {THIS}
* @param {?} rootElement
* @return {THIS}
*/
DragRef.prototype.withRootElement = /**
* Sets an alternate drag root element. The root element is the element that will be moved as
* the user is dragging. Passing an alternate root element is useful when trying to enable
* dragging on an element that you might not have access to.
* @template THIS
* @this {THIS}
* @param {?} rootElement
* @return {THIS}
*/
function (rootElement) {
/** @type {?} */
var element = coercion.coerceElement(rootElement);
if (element !== (/** @type {?} */ (this))._rootElement) {
if ((/** @type {?} */ (this))._rootElement) {
(/** @type {?} */ (this))._removeRootElementListeners((/** @type {?} */ (this))._rootElement);
}
element.addEventListener('mousedown', (/** @type {?} */ (this))._pointerDown, activeEventListenerOptions);
element.addEventListener('touchstart', (/** @type {?} */ (this))._pointerDown, passiveEventListenerOptions);
(/** @type {?} */ (this))._initialTransform = undefined;
(/** @type {?} */ (this))._rootElement = element;
}
return (/** @type {?} */ (this));
};
/**
* Element to which the draggable's position will be constrained.
*/
/**
* Element to which the draggable's position will be constrained.
* @template THIS
* @this {THIS}
* @param {?} boundaryElement
* @return {THIS}
*/
DragRef.prototype.withBoundaryElement = /**
* Element to which the draggable's position will be constrained.
* @template THIS
* @this {THIS}
* @param {?} boundaryElement
* @return {THIS}
*/
function (boundaryElement) {
(/** @type {?} */ (this))._boundaryElement = boundaryElement ? coercion.coerceElement(boundaryElement) : null;
return (/** @type {?} */ (this));
};
/** Removes the dragging functionality from the DOM element. */
/**
* Removes the dragging functionality from the DOM element.
* @return {?}
*/
DragRef.prototype.dispose = /**
* Removes the dragging functionality from the DOM element.
* @return {?}
*/
function () {
this._removeRootElementListeners(this._rootElement);
// Do this check before removing from the registry since it'll
// stop being considered as dragged once it is removed.
if (this.isDragging()) {
// Since we move out the element to the end of the body while it's being
// dragged, we have to make sure that it's removed if it gets destroyed.
removeElement(this._rootElement);
}
this._destroyPreview();
this._destroyPlaceholder();
this._dragDropRegistry.removeDragItem(this);
this._removeSubscriptions();
this.beforeStarted.complete();
this.started.complete();
this.released.complete();
this.ended.complete();
this.entered.complete();
this.exited.complete();
this.dropped.complete();
this._moveEvents.complete();
this._handles = [];
this._disabledHandles.clear();
this._dropContainer = undefined;
this._boundaryElement = this._rootElement = this._placeholderTemplate =
this._previewTemplate = this._nextSibling = (/** @type {?} */ (null));
};
/** Checks whether the element is currently being dragged. */
/**
* Checks whether the element is currently being dragged.
* @return {?}
*/
DragRef.prototype.isDragging = /**
* Checks whether the element is currently being dragged.
* @return {?}
*/
function () {
return this._hasStartedDragging && this._dragDropRegistry.isDragging(this);
};
/** Resets a standalone drag item to its initial position. */
/**
* Resets a standalone drag item to its initial position.
* @return {?}
*/
DragRef.prototype.reset = /**
* Resets a standalone drag item to its initial position.
* @return {?}
*/
function () {
this._rootElement.style.transform = this._initialTransform || '';
this._activeTransform = { x: 0, y: 0 };
this._passiveTransform = { x: 0, y: 0 };
};
/**
* Sets a handle as disabled. While a handle is disabled, it'll capture and interrupt dragging.
* @param handle Handle element that should be disabled.
*/
/**
* Sets a handle as disabled. While a handle is disabled, it'll capture and interrupt dragging.
* @param {?} handle Handle element that should be disabled.
* @return {?}
*/
DragRef.prototype.disableHandle = /**
* Sets a handle as disabled. While a handle is disabled, it'll capture and interrupt dragging.
* @param {?} handle Handle element that should be disabled.
* @return {?}
*/
function (handle) {
if (this._handles.indexOf(handle) > -1) {
this._disabledHandles.add(handle);
}
};
/**
* Enables a handle, if it has been disabled.
* @param handle Handle element to be enabled.
*/
/**
* Enables a handle, if it has been disabled.
* @param {?} handle Handle element to be enabled.
* @return {?}
*/
DragRef.prototype.enableHandle = /**
* Enables a handle, if it has been disabled.
* @param {?} handle Handle element to be enabled.
* @return {?}
*/
function (handle) {
this._disabledHandles.delete(handle);
};
/** Sets the layout direction of the draggable item. */
/**
* Sets the layout direction of the draggable item.
* @template THIS
* @this {THIS}
* @param {?} direction
* @return {THIS}
*/
DragRef.prototype.withDirection = /**
* Sets the layout direction of the draggable item.
* @template THIS
* @this {THIS}
* @param {?} direction
* @return {THIS}
*/
function (direction) {
(/** @type {?} */ (this))._direction = direction;
return (/** @type {?} */ (this));
};
/** Sets the container that the item is part of. */
/**
* Sets the container that the item is part of.
* @param {?} container
* @return {?}
*/
DragRef.prototype._withDropContainer = /**
* Sets the container that the item is part of.
* @param {?} container
* @return {?}
*/
function (container) {
this._dropContainer = container;
};
/** Unsubscribes from the global subscriptions. */
/**
* Unsubscribes from the global subscriptions.
* @private
* @return {?}
*/
DragRef.prototype._removeSubscriptions = /**
* Unsubscribes from the global subscriptions.
* @private
* @return {?}
*/
function () {
this._pointerMoveSubscription.unsubscribe();
this._pointerUpSubscription.unsubscribe();
};
/** Destroys the preview element and its ViewRef. */
/**
* Destroys the preview element and its ViewRef.
* @private
* @return {?}
*/
DragRef.prototype._destroyPreview = /**
* Destroys the preview element and its ViewRef.
* @private
* @return {?}
*/
function () {
if (this._preview) {
removeElement(this._preview);
}
if (this._previewRef) {
this._previewRef.destroy();
}
this._preview = this._previewRef = (/** @type {?} */ (null));
};
/** Destroys the placeholder element and its ViewRef. */
/**
* Destroys the placeholder element and its ViewRef.
* @private
* @return {?}
*/
DragRef.prototype._destroyPlaceholder = /**
* Destroys the placeholder element and its ViewRef.
* @private
* @return {?}
*/
function () {
if (this._placeholder) {
removeElement(this._placeholder);
}
if (this._placeholderRef) {
this._placeholderRef.destroy();
}
this._placeholder = this._placeholderRef = (/** @type {?} */ (null));
};
/** Starts the dragging sequence. */
/**
* Starts the dragging sequence.
* @private
* @param {?} event
* @return {?}
*/
DragRef.prototype._startDragSequence = /**
* Starts the dragging sequence.
* @private
* @param {?} event
* @return {?}
*/
function (event) {
// Emit the event on the item before the one on the container.
this.started.next({ source: this });
if (isTouchEvent(event)) {
this._lastTouchEventTime = Date.now();
}
if (this._dropContainer) {
/** @type {?} */
var element = this._rootElement;
// Grab the `nextSibling` before the preview and placeholder
// have been created so we don't get the preview by accident.
this._nextSibling = element.nextSibling;
/** @type {?} */
var preview = this._preview = this._createPreviewElement();
/** @type {?} */
var placeholder = this._placeholder = this._createPlaceholderElement();
// We move the element out at the end of the body and we make it hidden, because keeping it in
// place will throw off the consumer's `:last-child` selectors. We can't remove the element
// from the DOM completely, because iOS will stop firing all subsequent events in the chain.
element.style.display = 'none';
this._document.body.appendChild((/** @type {?} */ (element.parentNode)).replaceChild(placeholder, element));
this._document.body.appendChild(preview);
this._dropContainer.start();
}
};
/**
* Sets up the different variables and subscriptions
* that will be necessary for the dragging sequence.
* @param referenceElement Element that started the drag sequence.
* @param event Browser event object that started the sequence.
*/
/**
* Sets up the different variables and subscriptions
* that will be necessary for the dragging sequence.
* @private
* @param {?} referenceElement Element that started the drag sequence.
* @param {?} event Browser event object that started the sequence.
* @return {?}
*/
DragRef.prototype._initializeDragSequence = /**
* Sets up the different variables and subscriptions
* that will be necessary for the dragging sequence.
* @private
* @param {?} referenceElement Element that started the drag sequence.
* @param {?} event Browser event object that started the sequence.
* @return {?}
*/
function (referenceElement, event) {
// Always stop propagation for the event that initializes
// the dragging sequence, in order to prevent it from potentially
// starting another sequence for a draggable parent somewhere up the DOM tree.
event.stopPropagation();
/** @type {?} */
var isDragging = this.isDragging();
/** @type {?} */
var isTouchSequence = isTouchEvent(event);
/** @type {?} */
var isAuxiliaryMouseButton = !isTouchSequence && ((/** @type {?} */ (event))).button !== 0;
/** @type {?} */
var rootElement = this._rootElement;
/** @type {?} */
var isSyntheticEvent = !isTouchSequence && this._lastTouchEventTime &&
this._lastTouchEventTime + MOUSE_EVENT_IGNORE_TIME > Date.now();
// If the event started from an element with the native HTML drag&drop, it'll interfere
// with our own dragging (e.g. `img` tags do it by default). Prevent the default action
// to stop it from happening. Note that preventing on `dragstart` also seems to work, but
// it's flaky and it fails if the user drags it away quickly. Also note that we only want
// to do this for `mousedown` since doing the same for `touchstart` will stop any `click`
// events from firing on touch devices.
if (event.target && ((/** @type {?} */ (event.target))).draggable && event.type === 'mousedown') {
event.preventDefault();
}
// Abort if the user is already dragging or is using a mouse button other than the primary one.
if (isDragging || isAuxiliaryMouseButton || isSyntheticEvent) {
return;
}
// Cache the previous transform amount only after the first drag sequence, because
// we don't want our own transforms to stack on top of each other.
if (this._initialTransform == null) {
this._initialTransform = this._rootElement.style.transform || '';
}
// If we've got handles, we need to disable the tap highlight on the entire root element,
// otherwise iOS will still add it, even though all the drag interactions on the handle
// are disabled.
if (this._handles.length) {
this._rootElementTapHighlight = rootElement.style.webkitTapHighlightColor;
rootElement.style.webkitTapHighlightColor = 'transparent';
}
this._toggleNativeDragInteractions();
this._hasStartedDragging = this._hasMoved = false;
this._initialContainer = (/** @type {?} */ (this._dropContainer));
this._pointerMoveSubscription = this._dragDropRegistry.pointerMove.subscribe(this._pointerMove);
this._pointerUpSubscription = this._dragDropRegistry.pointerUp.subscribe(this._pointerUp);
this._scrollPosition = this._viewportRuler.getViewportScrollPosition();
if (this._boundaryElement) {
this._boundaryRect = this._boundaryElement.getBoundingClientRect();
}
// If we have a custom preview template, the element won't be visible anyway so we avoid the
// extra `getBoundingClientRect` calls and just move the preview next to the cursor.
this._pickupPositionInElement = this._previewTemplate && this._previewTemplate.template ?
{ x: 0, y: 0 } :
this._getPointerPositionInElement(referenceElement, event);
/** @type {?} */
var pointerPosition = this._pickupPositionOnPage = this._getPointerPositionOnPage(event);
this._pointerDirectionDelta = { x: 0, y: 0 };
this._pointerPositionAtLastDirectionChange = { x: pointerPosition.x, y: pointerPosition.y };
this._dragDropRegistry.startDragging(this, event);
};
/** Cleans up the DOM artifacts that were added to facilitate the element being dragged. */
/**
* Cleans up the DOM artifacts that were added to facilitate the element being dragged.
* @private
* @param {?} event
* @return {?}
*/
DragRef.prototype._cleanupDragArtifacts = /**
* Cleans up the DOM artifacts that were added to facilitate the element being dragged.
* @private
* @param {?} event
* @return {?}
*/
function (event) {
var _this = this;
// Restore the element's visibility and insert it at its old position in the DOM.
// It's important that we maintain the position, because moving the element around in the DOM
// can throw off `NgFor` which does smart diffing and re-creates elements only when necessary,
// while moving the existing elements in all other cases.
this._rootElement.style.display = '';
if (this._nextSibling) {
(/** @type {?} */ (this._nextSibling.parentNode)).insertBefore(this._rootElement, this._nextSibling);
}
else {
this._initialContainer.element.appendChild(this._rootElement);
}
this._destroyPreview();
this._destroyPlaceholder();
this._boundaryRect = this._previewRect = undefined;
// Re-enter the NgZone since we bound `document` events on the outside.
this._ngZone.run(function () {
/** @type {?} */
var container = (/** @type {?} */ (_this._dropContainer));
/** @type {?} */
var currentIndex = container.getItemIndex(_this);
var _a = _this._getPointerPositionOnPage(event), x = _a.x, y = _a.y;
/** @type {?} */
var isPointerOverContainer = container._isOverContainer(x, y);
_this.ended.next({ source: _this });
_this.dropped.next({
item: _this,
currentIndex: currentIndex,
previousIndex: _this._initialContainer.getItemIndex(_this),
container: container,
previousContainer: _this._initialContainer,
isPointerOverContainer: isPointerOverContainer
});
container.drop(_this, currentIndex, _this._initialContainer, isPointerOverContainer);
_this._dropContainer = _this._initialContainer;
});
};
/**
* Updates the item's position in its drop container, or moves it
* into a new one, depending on its current drag position.
*/
/**
* Updates the item's position in its drop container, or moves it
* into a new one, depending on its current drag position.
* @private
* @param {?} __0
* @return {?}
*/
DragRef.prototype._updateActiveDropContainer = /**
* Updates the item's position in its drop container, or moves it
* into a new one, depending on its current drag position.
* @private
* @param {?} __0
* @return {?}
*/
function (_a) {
var _this = this;
var x = _a.x, y = _a.y;
// Drop container that draggable has been moved into.
/** @type {?} */
var newContainer = (/** @type {?} */ (this._dropContainer))._getSiblingContainerFromPosition(this, x, y) ||
this._initialContainer._getSiblingContainerFromPosition(this, x, y);
// If we couldn't find a new container to move the item into, and the item has left it's
// initial container, check whether the it's over the initial container. This handles the
// case where two containers are connected one way and the user tries to undo dragging an
// item into a new container.
if (!newContainer && this._dropContainer !== this._initialContainer &&
this._initialContainer._isOverContainer(x, y)) {
newContainer = this._initialContainer;
}
if (newContainer && newContainer !== this._dropContainer) {
this._ngZone.run(function () {
// Notify the old container that the item has left.
_this.exited.next({ item: _this, container: (/** @type {?} */ (_this._dropContainer)) });
(/** @type {?} */ (_this._dropContainer)).exit(_this);
// Notify the new container that the item has entered.
_this.entered.next({ item: _this, container: (/** @type {?} */ (newContainer)) });
_this._dropContainer = (/** @type {?} */ (newContainer));
_this._dropContainer.enter(_this, x, y);
});
}
(/** @type {?} */ (this._dropContainer))._sortItem(this, x, y, this._pointerDirectionDelta);
this._preview.style.transform =
getTransform(x - this._pickupPositionInElement.x, y - this._pickupPositionInElement.y);
};
/**
* Creates the element that will be rendered next to the user's pointer
* and will be used as a preview of the element that is being dragged.
*/
/**
* Creates the element that will be rendered next to the user's pointer
* and will be used as a preview of the element that is being dragged.
* @private
* @return {?}
*/
DragRef.prototype._createPreviewElement = /**
* Creates the element that will be rendered next to the user's pointer
* and will be used as a preview of the element that is being dragged.
* @private
* @return {?}
*/
function () {
/** @type {?} */
var previewConfig = this._previewTemplate;
/** @type {?} */
var previewTemplate = previewConfig ? previewConfig.template : null;
/** @type {?} */
var preview;
if (previewTemplate) {
/** @type {?} */
var viewRef = (/** @type {?} */ (previewConfig)).viewContainer.createEmbeddedView(previewTemplate, (/** @type {?} */ (previewConfig)).context);
preview = viewRef.rootNodes[0];
this._previewRef = viewRef;
preview.style.transform =
getTransform(this._pickupPositionOnPage.x, this._pickupPositionOnPage.y);
}
else {
/** @type {?} */
var element = this._rootElement;
/** @type {?} */
var elementRect = element.getBoundingClientRect();
preview = deepCloneNode(element);
preview.style.width = elementRect.width + "px";
preview.style.height = elementRect.height + "px";
preview.style.transform = getTransform(elementRect.left, elementRect.top);
}
extendStyles(preview.style, {
// It's important that we disable the pointer events on the preview, because
// it can throw off the `document.elementFromPoint` calls in the `CdkDropList`.
pointerEvents: 'none',
position: 'fixed',
top: '0',
left: '0',
zIndex: '1000'
});
toggleNativeDragInteractions(preview, false);
preview.classList.add('cdk-drag-preview');
preview.setAttribute('dir', this._direction);
return preview;
};
/**
* Animates the preview element from its current position to the location of the drop placeholder.
* @returns Promise that resolves when the animation completes.
*/
/**
* Animates the preview element from its current position to the location of the drop placeholder.
* @private
* @return {?} Promise that resolves when the animation completes.
*/
DragRef.prototype._animatePreviewToPlaceholder = /**
* Animates the preview element from its current position to the location of the drop placeholder.
* @private
* @return {?} Promise that resolves when the animation completes.
*/
function () {
var _this = this;
// If the user hasn't moved yet, the transitionend event won't fire.
if (!this._hasMoved) {
return Promise.resolve();
}
/** @type {?} */
var placeholderRect = this._placeholder.getBoundingClientRect();
// Apply the class that adds a transition to the preview.
this._preview.classList.add('cdk-drag-animating');
// Move the preview to the placeholder position.
this._preview.style.transform = getTransform(placeholderRect.left, placeholderRect.top);
// If the element doesn't have a `transition`, the `transitionend` event won't fire. Since
// we need to trigger a style recalculation in order for the `cdk-drag-animating` class to
// apply its style, we take advantage of the available info to figure out whether we need to
// bind the event in the first place.
/** @type {?} */
var duration = getTransformTransitionDurationInMs(this._preview);
if (duration === 0) {
return Promise.resolve();
}
return this._ngZone.runOutsideAngular(function () {
return new Promise(function (resolve) {
/** @type {?} */
var handler = (/** @type {?} */ ((function (event) {
if (!event || (event.target === _this._preview && event.propertyName === 'transform')) {
_this._preview.removeEventListener('transitionend', handler);
resolve();
clearTimeout(timeout);
}
})));
// If a transition is short enough, the browser might not fire the `transitionend` event.
// Since we know how long it's supposed to take, add a timeout with a 50% buffer that'll
// fire if the transition hasn't completed when it was supposed to.
/** @type {?} */
var timeout = setTimeout((/** @type {?} */ (handler)), duration * 1.5);
_this._preview.addEventListener('transitionend', handler);
});
});
};
/** Creates an element that will be shown instead of the current element while dragging. */
/**
* Creates an element that will be shown instead of the current element while dragging.
* @private
* @return {?}
*/
DragRef.prototype._createPlaceholderElement = /**
* Creates an element that will be shown instead of the current element while dragging.
* @private
* @return {?}
*/
function () {
/** @type {?} */
var placeholderConfig = this._placeholderTemplate;
/** @type {?} */
var placeholderTemplate = placeholderConfig ? placeholderConfig.template : null;
/** @type {?} */
var placeholder;
if (placeholderTemplate) {
this._placeholderRef = (/** @type {?} */ (placeholderConfig)).viewContainer.createEmbeddedView(placeholderTemplate, (/** @type {?} */ (placeholderConfig)).context);
placeholder = this._placeholderRef.rootNodes[0];
}
else {
placeholder = deepCloneNode(this._rootElement);
}
placeholder.classList.add('cdk-drag-placeholder');
return placeholder;
};
/**
* Figures out the coordinates at which an element was picked up.
* @param referenceElement Element that initiated the dragging.
* @param event Event that initiated the dragging.
*/
/**
* Figures out the coordinates at which an element was picked up.
* @private
* @param {?} referenceElement Element that initiated the dragging.
* @param {?} event Event that initiated the dragging.
* @return {?}
*/
DragRef.prototype._getPointerPositionInElement = /**
* Figures out the coordinates at which an element was picked up.
* @private
* @param {?} referenceElement Element that initiated the dragging.
* @param {?} event Event that initiated the dragging.
* @return {?}
*/
function (referenceElement, event) {
/** @type {?} */
var elementRect = this._rootElement.getBoundingClientRect();
/** @type {?} */
var handleElement = referenceElement === this._rootElement ? null : referenceElement;
/** @type {?} */
var referenceRect = handleElement ? handleElement.getBoundingClientRect() : elementRect;
/** @type {?} */
var point = isTouchEvent(event) ? event.targetTouches[0] : event;
/** @type {?} */
var x = point.pageX - referenceRect.left - this._scrollPosition.left;
/** @type {?} */
var y = point.pageY - referenceRect.top - this._scrollPosition.top;
return {
x: referenceRect.left - elementRect.left + x,
y: referenceRect.top - elementRect.top + y
};
};
/** Determines the point of the page that was touched by the user. */
/**
* Determines the point of the page that was touched by the user.
* @private
* @param {?} event
* @return {?}
*/
DragRef.prototype._getPointerPositionOnPage = /**
* Determines the point of the page that was touched by the user.
* @private
* @param {?} event
* @return {?}
*/
function (event) {
// `touches` will be empty for start/end events so we have to fall back to `changedTouches`.
/** @type {?} */
var point = isTouchEvent(event) ? (event.touches[0] || event.changedTouches[0]) : event;
return {
x: point.pageX - this._scrollPosition.left,
y: point.pageY - this._scrollPosition.top
};
};
/** Gets the pointer position on the page, accounting for any position constraints. */
/**
* Gets the pointer position on the page, accounting for any position constraints.
* @private
* @param {?} event
* @return {?}
*/
DragRef.prototype._getConstrainedPointerPosition = /**
* Gets the pointer position on the page, accounting for any position constraints.
* @private
* @param {?} event
* @return {?}
*/
function (event) {
/** @type {?} */
var point = this._getPointerPositionOnPage(event);
/** @type {?} */
var dropContainerLock = this._dropContainer ? this._dropContainer.lockAxis : null;
if (this.lockAxis === 'x' || dropContainerLock === 'x') {
point.y = this._pickupPositionOnPage.y;
}
else if (this.lockAxis === 'y' || dropContainerLock === 'y') {
point.x = this._pickupPositionOnPage.x;
}
if