3657 lines
172 KiB
JavaScript
3657 lines
172 KiB
JavaScript
import * as i0 from '@angular/core';
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import { Injectable, Inject, InjectionToken, Directive, Optional, SkipSelf, Input, EventEmitter, Self, ContentChildren, ContentChild, Output, NgModule } from '@angular/core';
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import { DOCUMENT } from '@angular/common';
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import * as i1 from '@angular/cdk/scrolling';
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import { CdkScrollableModule } from '@angular/cdk/scrolling';
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import { _getEventTarget, normalizePassiveListenerOptions, _getShadowRoot } from '@angular/cdk/platform';
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import { coerceBooleanProperty, coerceElement, coerceNumberProperty, coerceArray } from '@angular/cdk/coercion';
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import { isFakeTouchstartFromScreenReader, isFakeMousedownFromScreenReader } from '@angular/cdk/a11y';
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import { Subject, Subscription, interval, animationFrameScheduler, Observable, merge } from 'rxjs';
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import { takeUntil, map, take, startWith, tap, switchMap } from 'rxjs/operators';
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import * as i1$1 from '@angular/cdk/bidi';
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/**
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* Shallow-extends a stylesheet object with another stylesheet-like object.
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* Note that the keys in `source` have to be dash-cased.
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* @docs-private
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*/
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function extendStyles(dest, source, importantProperties) {
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for (let key in source) {
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if (source.hasOwnProperty(key)) {
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const value = source[key];
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if (value) {
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dest.setProperty(key, value, importantProperties?.has(key) ? 'important' : '');
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}
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else {
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dest.removeProperty(key);
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}
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}
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}
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return dest;
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}
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/**
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* Toggles whether the native drag interactions should be enabled for an element.
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* @param element Element on which to toggle the drag interactions.
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* @param enable Whether the drag interactions should be enabled.
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* @docs-private
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*/
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function toggleNativeDragInteractions(element, enable) {
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const userSelect = enable ? '' : 'none';
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extendStyles(element.style, {
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'touch-action': enable ? '' : 'none',
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'-webkit-user-drag': enable ? '' : 'none',
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'-webkit-tap-highlight-color': enable ? '' : 'transparent',
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'user-select': userSelect,
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'-ms-user-select': userSelect,
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'-webkit-user-select': userSelect,
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'-moz-user-select': userSelect,
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});
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}
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/**
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* Toggles whether an element is visible while preserving its dimensions.
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* @param element Element whose visibility to toggle
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* @param enable Whether the element should be visible.
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* @param importantProperties Properties to be set as `!important`.
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* @docs-private
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*/
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function toggleVisibility(element, enable, importantProperties) {
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extendStyles(element.style, {
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position: enable ? '' : 'fixed',
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top: enable ? '' : '0',
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opacity: enable ? '' : '0',
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left: enable ? '' : '-999em',
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}, importantProperties);
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}
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/**
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* Combines a transform string with an optional other transform
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* that exited before the base transform was applied.
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*/
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function combineTransforms(transform, initialTransform) {
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return initialTransform && initialTransform != 'none'
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? transform + ' ' + initialTransform
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: transform;
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}
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/** Parses a CSS time value to milliseconds. */
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function parseCssTimeUnitsToMs(value) {
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// Some browsers will return it in seconds, whereas others will return milliseconds.
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const multiplier = value.toLowerCase().indexOf('ms') > -1 ? 1 : 1000;
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return parseFloat(value) * multiplier;
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}
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/** Gets the transform transition duration, including the delay, of an element in milliseconds. */
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function getTransformTransitionDurationInMs(element) {
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const computedStyle = getComputedStyle(element);
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const transitionedProperties = parseCssPropertyValue(computedStyle, 'transition-property');
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const property = transitionedProperties.find(prop => prop === 'transform' || prop === 'all');
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// If there's no transition for `all` or `transform`, we shouldn't do anything.
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if (!property) {
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return 0;
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}
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// Get the index of the property that we're interested in and match
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// it up to the same index in `transition-delay` and `transition-duration`.
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const propertyIndex = transitionedProperties.indexOf(property);
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const rawDurations = parseCssPropertyValue(computedStyle, 'transition-duration');
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const rawDelays = parseCssPropertyValue(computedStyle, 'transition-delay');
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return (parseCssTimeUnitsToMs(rawDurations[propertyIndex]) +
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parseCssTimeUnitsToMs(rawDelays[propertyIndex]));
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}
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/** Parses out multiple values from a computed style into an array. */
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function parseCssPropertyValue(computedStyle, name) {
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const value = computedStyle.getPropertyValue(name);
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return value.split(',').map(part => part.trim());
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}
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/** Gets a mutable version of an element's bounding `ClientRect`. */
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function getMutableClientRect(element) {
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const clientRect = element.getBoundingClientRect();
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// We need to clone the `clientRect` here, because all the values on it are readonly
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// and we need to be able to update them. Also we can't use a spread here, because
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// the values on a `ClientRect` aren't own properties. See:
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// https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect#Notes
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return {
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top: clientRect.top,
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right: clientRect.right,
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bottom: clientRect.bottom,
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left: clientRect.left,
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width: clientRect.width,
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height: clientRect.height,
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x: clientRect.x,
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y: clientRect.y,
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};
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}
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/**
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* Checks whether some coordinates are within a `ClientRect`.
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* @param clientRect ClientRect that is being checked.
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* @param x Coordinates along the X axis.
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* @param y Coordinates along the Y axis.
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*/
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function isInsideClientRect(clientRect, x, y) {
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const { top, bottom, left, right } = clientRect;
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return y >= top && y <= bottom && x >= left && x <= right;
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}
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/**
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* Updates the top/left positions of a `ClientRect`, as well as their bottom/right counterparts.
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* @param clientRect `ClientRect` that should be updated.
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* @param top Amount to add to the `top` position.
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* @param left Amount to add to the `left` position.
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*/
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function adjustClientRect(clientRect, top, left) {
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clientRect.top += top;
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clientRect.bottom = clientRect.top + clientRect.height;
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clientRect.left += left;
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clientRect.right = clientRect.left + clientRect.width;
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}
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/**
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* Checks whether the pointer coordinates are close to a ClientRect.
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* @param rect ClientRect to check against.
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* @param threshold Threshold around the ClientRect.
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* @param pointerX Coordinates along the X axis.
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* @param pointerY Coordinates along the Y axis.
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*/
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function isPointerNearClientRect(rect, threshold, pointerX, pointerY) {
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const { top, right, bottom, left, width, height } = rect;
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const xThreshold = width * threshold;
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const yThreshold = height * threshold;
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return (pointerY > top - yThreshold &&
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pointerY < bottom + yThreshold &&
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pointerX > left - xThreshold &&
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pointerX < right + xThreshold);
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}
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/** Keeps track of the scroll position and dimensions of the parents of an element. */
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class ParentPositionTracker {
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constructor(_document) {
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this._document = _document;
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/** Cached positions of the scrollable parent elements. */
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this.positions = new Map();
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}
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/** Clears the cached positions. */
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clear() {
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this.positions.clear();
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}
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/** Caches the positions. Should be called at the beginning of a drag sequence. */
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cache(elements) {
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this.clear();
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this.positions.set(this._document, {
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scrollPosition: this.getViewportScrollPosition(),
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});
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elements.forEach(element => {
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this.positions.set(element, {
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scrollPosition: { top: element.scrollTop, left: element.scrollLeft },
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clientRect: getMutableClientRect(element),
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});
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});
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}
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/** Handles scrolling while a drag is taking place. */
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handleScroll(event) {
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const target = _getEventTarget(event);
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const cachedPosition = this.positions.get(target);
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if (!cachedPosition) {
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return null;
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}
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const scrollPosition = cachedPosition.scrollPosition;
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let newTop;
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let newLeft;
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if (target === this._document) {
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const viewportScrollPosition = this.getViewportScrollPosition();
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newTop = viewportScrollPosition.top;
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newLeft = viewportScrollPosition.left;
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}
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else {
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newTop = target.scrollTop;
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newLeft = target.scrollLeft;
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}
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const topDifference = scrollPosition.top - newTop;
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const leftDifference = scrollPosition.left - newLeft;
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// Go through and update the cached positions of the scroll
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// parents that are inside the element that was scrolled.
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this.positions.forEach((position, node) => {
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if (position.clientRect && target !== node && target.contains(node)) {
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adjustClientRect(position.clientRect, topDifference, leftDifference);
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}
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});
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scrollPosition.top = newTop;
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scrollPosition.left = newLeft;
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return { top: topDifference, left: leftDifference };
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}
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/**
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* Gets the scroll position of the viewport. Note that we use the scrollX and scrollY directly,
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* instead of going through the `ViewportRuler`, because the first value the ruler looks at is
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* the top/left offset of the `document.documentElement` which works for most cases, but breaks
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* if the element is offset by something like the `BlockScrollStrategy`.
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*/
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getViewportScrollPosition() {
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return { top: window.scrollY, left: window.scrollX };
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}
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}
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/** Creates a deep clone of an element. */
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function deepCloneNode(node) {
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const clone = node.cloneNode(true);
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const descendantsWithId = clone.querySelectorAll('[id]');
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const nodeName = node.nodeName.toLowerCase();
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// Remove the `id` to avoid having multiple elements with the same id on the page.
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clone.removeAttribute('id');
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for (let i = 0; i < descendantsWithId.length; i++) {
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descendantsWithId[i].removeAttribute('id');
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}
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if (nodeName === 'canvas') {
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transferCanvasData(node, clone);
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}
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else if (nodeName === 'input' || nodeName === 'select' || nodeName === 'textarea') {
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transferInputData(node, clone);
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}
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transferData('canvas', node, clone, transferCanvasData);
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transferData('input, textarea, select', node, clone, transferInputData);
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return clone;
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}
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/** Matches elements between an element and its clone and allows for their data to be cloned. */
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function transferData(selector, node, clone, callback) {
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const descendantElements = node.querySelectorAll(selector);
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if (descendantElements.length) {
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const cloneElements = clone.querySelectorAll(selector);
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for (let i = 0; i < descendantElements.length; i++) {
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callback(descendantElements[i], cloneElements[i]);
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}
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}
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}
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// Counter for unique cloned radio button names.
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let cloneUniqueId = 0;
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/** Transfers the data of one input element to another. */
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function transferInputData(source, clone) {
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// Browsers throw an error when assigning the value of a file input programmatically.
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if (clone.type !== 'file') {
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clone.value = source.value;
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}
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// Radio button `name` attributes must be unique for radio button groups
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// otherwise original radio buttons can lose their checked state
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// once the clone is inserted in the DOM.
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if (clone.type === 'radio' && clone.name) {
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clone.name = `mat-clone-${clone.name}-${cloneUniqueId++}`;
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}
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}
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/** Transfers the data of one canvas element to another. */
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function transferCanvasData(source, clone) {
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const context = clone.getContext('2d');
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if (context) {
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// In some cases `drawImage` can throw (e.g. if the canvas size is 0x0).
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// We can't do much about it so just ignore the error.
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try {
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context.drawImage(source, 0, 0);
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}
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catch { }
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}
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}
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/** Options that can be used to bind a passive event listener. */
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const passiveEventListenerOptions = normalizePassiveListenerOptions({ passive: true });
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/** Options that can be used to bind an active event listener. */
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const activeEventListenerOptions = normalizePassiveListenerOptions({ passive: false });
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/**
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* Time in milliseconds for which to ignore mouse events, after
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* receiving a touch event. Used to avoid doing double work for
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* touch devices where the browser fires fake mouse events, in
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* addition to touch events.
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*/
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const MOUSE_EVENT_IGNORE_TIME = 800;
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/** Inline styles to be set as `!important` while dragging. */
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const dragImportantProperties = new Set([
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// Needs to be important, because some `mat-table` sets `position: sticky !important`. See #22781.
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'position',
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]);
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/**
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* Reference to a draggable item. Used to manipulate or dispose of the item.
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*/
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class DragRef {
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/** Whether starting to drag this element is disabled. */
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get disabled() {
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return this._disabled || !!(this._dropContainer && this._dropContainer.disabled);
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}
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set disabled(value) {
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const newValue = coerceBooleanProperty(value);
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if (newValue !== this._disabled) {
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this._disabled = newValue;
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this._toggleNativeDragInteractions();
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this._handles.forEach(handle => toggleNativeDragInteractions(handle, newValue));
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}
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}
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constructor(element, _config, _document, _ngZone, _viewportRuler, _dragDropRegistry) {
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this._config = _config;
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this._document = _document;
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this._ngZone = _ngZone;
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this._viewportRuler = _viewportRuler;
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this._dragDropRegistry = _dragDropRegistry;
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/**
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* CSS `transform` applied to the element when it isn't being dragged. We need a
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* passive transform in order for the dragged element to retain its new position
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* after the user has stopped dragging and because we need to know the relative
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* position in case they start dragging again. This corresponds to `element.style.transform`.
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*/
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this._passiveTransform = { x: 0, y: 0 };
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/** CSS `transform` that is applied to the element while it's being dragged. */
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this._activeTransform = { x: 0, y: 0 };
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/**
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* Whether the dragging sequence has been started. Doesn't
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* necessarily mean that the element has been moved.
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*/
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this._hasStartedDragging = false;
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/** Emits when the item is being moved. */
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this._moveEvents = new Subject();
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/** Subscription to pointer movement events. */
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this._pointerMoveSubscription = Subscription.EMPTY;
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/** Subscription to the event that is dispatched when the user lifts their pointer. */
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this._pointerUpSubscription = Subscription.EMPTY;
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/** Subscription to the viewport being scrolled. */
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this._scrollSubscription = Subscription.EMPTY;
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/** Subscription to the viewport being resized. */
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this._resizeSubscription = Subscription.EMPTY;
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/** Cached reference to the boundary element. */
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this._boundaryElement = null;
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/** Whether the native dragging interactions have been enabled on the root element. */
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this._nativeInteractionsEnabled = true;
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/** Elements that can be used to drag the draggable item. */
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this._handles = [];
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/** Registered handles that are currently disabled. */
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this._disabledHandles = new Set();
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/** Layout direction of the item. */
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this._direction = 'ltr';
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/**
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* Amount of milliseconds to wait after the user has put their
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* pointer down before starting to drag the element.
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*/
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this.dragStartDelay = 0;
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this._disabled = false;
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/** Emits as the drag sequence is being prepared. */
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this.beforeStarted = new Subject();
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/** Emits when the user starts dragging the item. */
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this.started = new Subject();
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/** Emits when the user has released a drag item, before any animations have started. */
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this.released = new Subject();
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/** Emits when the user stops dragging an item in the container. */
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this.ended = new Subject();
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/** Emits when the user has moved the item into a new container. */
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this.entered = new Subject();
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/** Emits when the user removes the item its container by dragging it into another container. */
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this.exited = new Subject();
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/** Emits when the user drops the item inside a container. */
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this.dropped = new Subject();
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/**
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* Emits as the user is dragging the item. Use with caution,
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* because this event will fire for every pixel that the user has dragged.
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*/
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this.moved = this._moveEvents;
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/** Handler for the `mousedown`/`touchstart` events. */
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this._pointerDown = (event) => {
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this.beforeStarted.next();
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// Delegate the event based on whether it started from a handle or the element itself.
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if (this._handles.length) {
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const targetHandle = this._getTargetHandle(event);
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if (targetHandle && !this._disabledHandles.has(targetHandle) && !this.disabled) {
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this._initializeDragSequence(targetHandle, event);
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}
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}
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else if (!this.disabled) {
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this._initializeDragSequence(this._rootElement, event);
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}
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};
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/** Handler that is invoked when the user moves their pointer after they've initiated a drag. */
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this._pointerMove = (event) => {
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const pointerPosition = this._getPointerPositionOnPage(event);
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if (!this._hasStartedDragging) {
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const distanceX = Math.abs(pointerPosition.x - this._pickupPositionOnPage.x);
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const distanceY = Math.abs(pointerPosition.y - this._pickupPositionOnPage.y);
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const isOverThreshold = distanceX + distanceY >= this._config.dragStartThreshold;
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// Only start dragging after the user has moved more than the minimum distance in either
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// direction. Note that this is preferable over doing something like `skip(minimumDistance)`
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// in the `pointerMove` subscription, because we're not guaranteed to have one move event
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// per pixel of movement (e.g. if the user moves their pointer quickly).
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if (isOverThreshold) {
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const isDelayElapsed = Date.now() >= this._dragStartTime + this._getDragStartDelay(event);
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const container = this._dropContainer;
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if (!isDelayElapsed) {
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this._endDragSequence(event);
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return;
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}
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// Prevent other drag sequences from starting while something in the container is still
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// being dragged. This can happen while we're waiting for the drop animation to finish
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// and can cause errors, because some elements might still be moving around.
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if (!container || (!container.isDragging() && !container.isReceiving())) {
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// Prevent the default action as soon as the dragging sequence is considered as
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// "started" since waiting for the next event can allow the device to begin scrolling.
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event.preventDefault();
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this._hasStartedDragging = true;
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this._ngZone.run(() => this._startDragSequence(event));
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}
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}
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return;
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}
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// We prevent the default action down here so that we know that dragging has started. This is
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// important for touch devices where doing this too early can unnecessarily block scrolling,
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// if there's a dragging delay.
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event.preventDefault();
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const constrainedPointerPosition = this._getConstrainedPointerPosition(pointerPosition);
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this._hasMoved = true;
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this._lastKnownPointerPosition = pointerPosition;
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this._updatePointerDirectionDelta(constrainedPointerPosition);
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if (this._dropContainer) {
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this._updateActiveDropContainer(constrainedPointerPosition, pointerPosition);
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}
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else {
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// If there's a position constraint function, we want the element's top/left to be at the
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// specific position on the page. Use the initial position as a reference if that's the case.
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const offset = this.constrainPosition ? this._initialClientRect : this._pickupPositionOnPage;
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const activeTransform = this._activeTransform;
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activeTransform.x = constrainedPointerPosition.x - offset.x + this._passiveTransform.x;
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activeTransform.y = constrainedPointerPosition.y - offset.y + this._passiveTransform.y;
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this._applyRootElementTransform(activeTransform.x, activeTransform.y);
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}
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// Since this event gets fired for every pixel while dragging, we only
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// want to fire it if the consumer opted into it. Also we have to
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// re-enter the zone because we run all of the events on the outside.
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if (this._moveEvents.observers.length) {
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this._ngZone.run(() => {
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this._moveEvents.next({
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source: this,
|
|
pointerPosition: constrainedPointerPosition,
|
|
event,
|
|
distance: this._getDragDistance(constrainedPointerPosition),
|
|
delta: this._pointerDirectionDelta,
|
|
});
|
|
});
|
|
}
|
|
};
|
|
/** Handler that is invoked when the user lifts their pointer up, after initiating a drag. */
|
|
this._pointerUp = (event) => {
|
|
this._endDragSequence(event);
|
|
};
|
|
/** Handles a native `dragstart` event. */
|
|
this._nativeDragStart = (event) => {
|
|
if (this._handles.length) {
|
|
const targetHandle = this._getTargetHandle(event);
|
|
if (targetHandle && !this._disabledHandles.has(targetHandle) && !this.disabled) {
|
|
event.preventDefault();
|
|
}
|
|
}
|
|
else if (!this.disabled) {
|
|
// Usually this isn't necessary since the we prevent the default action in `pointerDown`,
|
|
// but some cases like dragging of links can slip through (see #24403).
|
|
event.preventDefault();
|
|
}
|
|
};
|
|
this.withRootElement(element).withParent(_config.parentDragRef || null);
|
|
this._parentPositions = new ParentPositionTracker(_document);
|
|
_dragDropRegistry.registerDragItem(this);
|
|
}
|
|
/**
|
|
* Returns the element that is being used as a placeholder
|
|
* while the current element is being dragged.
|
|
*/
|
|
getPlaceholderElement() {
|
|
return this._placeholder;
|
|
}
|
|
/** Returns the root draggable element. */
|
|
getRootElement() {
|
|
return this._rootElement;
|
|
}
|
|
/**
|
|
* Gets the currently-visible element that represents the drag item.
|
|
* While dragging this is the placeholder, otherwise it's the root element.
|
|
*/
|
|
getVisibleElement() {
|
|
return this.isDragging() ? this.getPlaceholderElement() : this.getRootElement();
|
|
}
|
|
/** Registers the handles that can be used to drag the element. */
|
|
withHandles(handles) {
|
|
this._handles = handles.map(handle => coerceElement(handle));
|
|
this._handles.forEach(handle => toggleNativeDragInteractions(handle, this.disabled));
|
|
this._toggleNativeDragInteractions();
|
|
// Delete any lingering disabled handles that may have been destroyed. Note that we re-create
|
|
// the set, rather than iterate over it and filter out the destroyed handles, because while
|
|
// the ES spec allows for sets to be modified while they're being iterated over, some polyfills
|
|
// use an array internally which may throw an error.
|
|
const disabledHandles = new Set();
|
|
this._disabledHandles.forEach(handle => {
|
|
if (this._handles.indexOf(handle) > -1) {
|
|
disabledHandles.add(handle);
|
|
}
|
|
});
|
|
this._disabledHandles = disabledHandles;
|
|
return this;
|
|
}
|
|
/**
|
|
* Registers the template that should be used for the drag preview.
|
|
* @param template Template that from which to stamp out the preview.
|
|
*/
|
|
withPreviewTemplate(template) {
|
|
this._previewTemplate = template;
|
|
return this;
|
|
}
|
|
/**
|
|
* Registers the template that should be used for the drag placeholder.
|
|
* @param template Template that from which to stamp out the placeholder.
|
|
*/
|
|
withPlaceholderTemplate(template) {
|
|
this._placeholderTemplate = template;
|
|
return 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.
|
|
*/
|
|
withRootElement(rootElement) {
|
|
const element = coerceElement(rootElement);
|
|
if (element !== this._rootElement) {
|
|
if (this._rootElement) {
|
|
this._removeRootElementListeners(this._rootElement);
|
|
}
|
|
this._ngZone.runOutsideAngular(() => {
|
|
element.addEventListener('mousedown', this._pointerDown, activeEventListenerOptions);
|
|
element.addEventListener('touchstart', this._pointerDown, passiveEventListenerOptions);
|
|
element.addEventListener('dragstart', this._nativeDragStart, activeEventListenerOptions);
|
|
});
|
|
this._initialTransform = undefined;
|
|
this._rootElement = element;
|
|
}
|
|
if (typeof SVGElement !== 'undefined' && this._rootElement instanceof SVGElement) {
|
|
this._ownerSVGElement = this._rootElement.ownerSVGElement;
|
|
}
|
|
return this;
|
|
}
|
|
/**
|
|
* Element to which the draggable's position will be constrained.
|
|
*/
|
|
withBoundaryElement(boundaryElement) {
|
|
this._boundaryElement = boundaryElement ? coerceElement(boundaryElement) : null;
|
|
this._resizeSubscription.unsubscribe();
|
|
if (boundaryElement) {
|
|
this._resizeSubscription = this._viewportRuler
|
|
.change(10)
|
|
.subscribe(() => this._containInsideBoundaryOnResize());
|
|
}
|
|
return this;
|
|
}
|
|
/** Sets the parent ref that the ref is nested in. */
|
|
withParent(parent) {
|
|
this._parentDragRef = parent;
|
|
return this;
|
|
}
|
|
/** Removes the dragging functionality from the DOM element. */
|
|
dispose() {
|
|
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.
|
|
this._rootElement?.remove();
|
|
}
|
|
this._anchor?.remove();
|
|
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._resizeSubscription.unsubscribe();
|
|
this._parentPositions.clear();
|
|
this._boundaryElement =
|
|
this._rootElement =
|
|
this._ownerSVGElement =
|
|
this._placeholderTemplate =
|
|
this._previewTemplate =
|
|
this._anchor =
|
|
this._parentDragRef =
|
|
null;
|
|
}
|
|
/** Checks whether the element is currently being dragged. */
|
|
isDragging() {
|
|
return this._hasStartedDragging && this._dragDropRegistry.isDragging(this);
|
|
}
|
|
/** Resets a standalone drag item to its initial position. */
|
|
reset() {
|
|
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.
|
|
*/
|
|
disableHandle(handle) {
|
|
if (!this._disabledHandles.has(handle) && this._handles.indexOf(handle) > -1) {
|
|
this._disabledHandles.add(handle);
|
|
toggleNativeDragInteractions(handle, true);
|
|
}
|
|
}
|
|
/**
|
|
* Enables a handle, if it has been disabled.
|
|
* @param handle Handle element to be enabled.
|
|
*/
|
|
enableHandle(handle) {
|
|
if (this._disabledHandles.has(handle)) {
|
|
this._disabledHandles.delete(handle);
|
|
toggleNativeDragInteractions(handle, this.disabled);
|
|
}
|
|
}
|
|
/** Sets the layout direction of the draggable item. */
|
|
withDirection(direction) {
|
|
this._direction = direction;
|
|
return this;
|
|
}
|
|
/** Sets the container that the item is part of. */
|
|
_withDropContainer(container) {
|
|
this._dropContainer = container;
|
|
}
|
|
/**
|
|
* Gets the current position in pixels the draggable outside of a drop container.
|
|
*/
|
|
getFreeDragPosition() {
|
|
const position = this.isDragging() ? this._activeTransform : this._passiveTransform;
|
|
return { x: position.x, y: position.y };
|
|
}
|
|
/**
|
|
* Sets the current position in pixels the draggable outside of a drop container.
|
|
* @param value New position to be set.
|
|
*/
|
|
setFreeDragPosition(value) {
|
|
this._activeTransform = { x: 0, y: 0 };
|
|
this._passiveTransform.x = value.x;
|
|
this._passiveTransform.y = value.y;
|
|
if (!this._dropContainer) {
|
|
this._applyRootElementTransform(value.x, value.y);
|
|
}
|
|
return this;
|
|
}
|
|
/**
|
|
* Sets the container into which to insert the preview element.
|
|
* @param value Container into which to insert the preview.
|
|
*/
|
|
withPreviewContainer(value) {
|
|
this._previewContainer = value;
|
|
return this;
|
|
}
|
|
/** Updates the item's sort order based on the last-known pointer position. */
|
|
_sortFromLastPointerPosition() {
|
|
const position = this._lastKnownPointerPosition;
|
|
if (position && this._dropContainer) {
|
|
this._updateActiveDropContainer(this._getConstrainedPointerPosition(position), position);
|
|
}
|
|
}
|
|
/** Unsubscribes from the global subscriptions. */
|
|
_removeSubscriptions() {
|
|
this._pointerMoveSubscription.unsubscribe();
|
|
this._pointerUpSubscription.unsubscribe();
|
|
this._scrollSubscription.unsubscribe();
|
|
}
|
|
/** Destroys the preview element and its ViewRef. */
|
|
_destroyPreview() {
|
|
this._preview?.remove();
|
|
this._previewRef?.destroy();
|
|
this._preview = this._previewRef = null;
|
|
}
|
|
/** Destroys the placeholder element and its ViewRef. */
|
|
_destroyPlaceholder() {
|
|
this._placeholder?.remove();
|
|
this._placeholderRef?.destroy();
|
|
this._placeholder = this._placeholderRef = null;
|
|
}
|
|
/**
|
|
* Clears subscriptions and stops the dragging sequence.
|
|
* @param event Browser event object that ended the sequence.
|
|
*/
|
|
_endDragSequence(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);
|
|
this._toggleNativeDragInteractions();
|
|
if (this._handles) {
|
|
this._rootElement.style.webkitTapHighlightColor =
|
|
this._rootElementTapHighlight;
|
|
}
|
|
if (!this._hasStartedDragging) {
|
|
return;
|
|
}
|
|
this.released.next({ source: this, event });
|
|
if (this._dropContainer) {
|
|
// Stop scrolling immediately, instead of waiting for the animation to finish.
|
|
this._dropContainer._stopScrolling();
|
|
this._animatePreviewToPlaceholder().then(() => {
|
|
this._cleanupDragArtifacts(event);
|
|
this._cleanupCachedDimensions();
|
|
this._dragDropRegistry.stopDragging(this);
|
|
});
|
|
}
|
|
else {
|
|
// 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;
|
|
const pointerPosition = this._getPointerPositionOnPage(event);
|
|
this._passiveTransform.y = this._activeTransform.y;
|
|
this._ngZone.run(() => {
|
|
this.ended.next({
|
|
source: this,
|
|
distance: this._getDragDistance(pointerPosition),
|
|
dropPoint: pointerPosition,
|
|
event,
|
|
});
|
|
});
|
|
this._cleanupCachedDimensions();
|
|
this._dragDropRegistry.stopDragging(this);
|
|
}
|
|
}
|
|
/** Starts the dragging sequence. */
|
|
_startDragSequence(event) {
|
|
if (isTouchEvent(event)) {
|
|
this._lastTouchEventTime = Date.now();
|
|
}
|
|
this._toggleNativeDragInteractions();
|
|
const dropContainer = this._dropContainer;
|
|
if (dropContainer) {
|
|
const element = this._rootElement;
|
|
const parent = element.parentNode;
|
|
const placeholder = (this._placeholder = this._createPlaceholderElement());
|
|
const anchor = (this._anchor = this._anchor || this._document.createComment(''));
|
|
// Needs to happen before the root element is moved.
|
|
const shadowRoot = this._getShadowRoot();
|
|
// Insert an anchor node so that we can restore the element's position in the DOM.
|
|
parent.insertBefore(anchor, element);
|
|
// There's no risk of transforms stacking when inside a drop container so
|
|
// we can keep the initial transform up to date any time dragging starts.
|
|
this._initialTransform = element.style.transform || '';
|
|
// Create the preview after the initial transform has
|
|
// been cached, because it can be affected by the transform.
|
|
this._preview = this._createPreviewElement();
|
|
// 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.
|
|
toggleVisibility(element, false, dragImportantProperties);
|
|
this._document.body.appendChild(parent.replaceChild(placeholder, element));
|
|
this._getPreviewInsertionPoint(parent, shadowRoot).appendChild(this._preview);
|
|
this.started.next({ source: this, event }); // Emit before notifying the container.
|
|
dropContainer.start();
|
|
this._initialContainer = dropContainer;
|
|
this._initialIndex = dropContainer.getItemIndex(this);
|
|
}
|
|
else {
|
|
this.started.next({ source: this, event });
|
|
this._initialContainer = this._initialIndex = undefined;
|
|
}
|
|
// Important to run after we've called `start` on the parent container
|
|
// so that it has had time to resolve its scrollable parents.
|
|
this._parentPositions.cache(dropContainer ? dropContainer.getScrollableParents() : []);
|
|
}
|
|
/**
|
|
* 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.
|
|
*/
|
|
_initializeDragSequence(referenceElement, event) {
|
|
// Stop propagation if the item is inside another
|
|
// draggable so we don't start multiple drag sequences.
|
|
if (this._parentDragRef) {
|
|
event.stopPropagation();
|
|
}
|
|
const isDragging = this.isDragging();
|
|
const isTouchSequence = isTouchEvent(event);
|
|
const isAuxiliaryMouseButton = !isTouchSequence && event.button !== 0;
|
|
const rootElement = this._rootElement;
|
|
const target = _getEventTarget(event);
|
|
const isSyntheticEvent = !isTouchSequence &&
|
|
this._lastTouchEventTime &&
|
|
this._lastTouchEventTime + MOUSE_EVENT_IGNORE_TIME > Date.now();
|
|
const isFakeEvent = isTouchSequence
|
|
? isFakeTouchstartFromScreenReader(event)
|
|
: isFakeMousedownFromScreenReader(event);
|
|
// 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 (target && 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 || isFakeEvent) {
|
|
return;
|
|
}
|
|
// 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) {
|
|
const rootStyles = rootElement.style;
|
|
this._rootElementTapHighlight = rootStyles.webkitTapHighlightColor || '';
|
|
rootStyles.webkitTapHighlightColor = 'transparent';
|
|
}
|
|
this._hasStartedDragging = this._hasMoved = false;
|
|
// Avoid multiple subscriptions and memory leaks when multi touch
|
|
// (isDragging check above isn't enough because of possible temporal and/or dimensional delays)
|
|
this._removeSubscriptions();
|
|
this._initialClientRect = this._rootElement.getBoundingClientRect();
|
|
this._pointerMoveSubscription = this._dragDropRegistry.pointerMove.subscribe(this._pointerMove);
|
|
this._pointerUpSubscription = this._dragDropRegistry.pointerUp.subscribe(this._pointerUp);
|
|
this._scrollSubscription = this._dragDropRegistry
|
|
.scrolled(this._getShadowRoot())
|
|
.subscribe(scrollEvent => this._updateOnScroll(scrollEvent));
|
|
if (this._boundaryElement) {
|
|
this._boundaryRect = getMutableClientRect(this._boundaryElement);
|
|
}
|
|
// If we have a custom preview we can't know ahead of time how large it'll be so we position
|
|
// it next to the cursor. The exception is when the consumer has opted into making the preview
|
|
// the same size as the root element, in which case we do know the size.
|
|
const previewTemplate = this._previewTemplate;
|
|
this._pickupPositionInElement =
|
|
previewTemplate && previewTemplate.template && !previewTemplate.matchSize
|
|
? { x: 0, y: 0 }
|
|
: this._getPointerPositionInElement(this._initialClientRect, referenceElement, event);
|
|
const pointerPosition = (this._pickupPositionOnPage =
|
|
this._lastKnownPointerPosition =
|
|
this._getPointerPositionOnPage(event));
|
|
this._pointerDirectionDelta = { x: 0, y: 0 };
|
|
this._pointerPositionAtLastDirectionChange = { x: pointerPosition.x, y: pointerPosition.y };
|
|
this._dragStartTime = Date.now();
|
|
this._dragDropRegistry.startDragging(this, event);
|
|
}
|
|
/** Cleans up the DOM artifacts that were added to facilitate the element being dragged. */
|
|
_cleanupDragArtifacts(event) {
|
|
// 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.
|
|
toggleVisibility(this._rootElement, true, dragImportantProperties);
|
|
this._anchor.parentNode.replaceChild(this._rootElement, this._anchor);
|
|
this._destroyPreview();
|
|
this._destroyPlaceholder();
|
|
this._initialClientRect =
|
|
this._boundaryRect =
|
|
this._previewRect =
|
|
this._initialTransform =
|
|
undefined;
|
|
// Re-enter the NgZone since we bound `document` events on the outside.
|
|
this._ngZone.run(() => {
|
|
const container = this._dropContainer;
|
|
const currentIndex = container.getItemIndex(this);
|
|
const pointerPosition = this._getPointerPositionOnPage(event);
|
|
const distance = this._getDragDistance(pointerPosition);
|
|
const isPointerOverContainer = container._isOverContainer(pointerPosition.x, pointerPosition.y);
|
|
this.ended.next({ source: this, distance, dropPoint: pointerPosition, event });
|
|
this.dropped.next({
|
|
item: this,
|
|
currentIndex,
|
|
previousIndex: this._initialIndex,
|
|
container: container,
|
|
previousContainer: this._initialContainer,
|
|
isPointerOverContainer,
|
|
distance,
|
|
dropPoint: pointerPosition,
|
|
event,
|
|
});
|
|
container.drop(this, currentIndex, this._initialIndex, this._initialContainer, isPointerOverContainer, distance, pointerPosition, event);
|
|
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.
|
|
*/
|
|
_updateActiveDropContainer({ x, y }, { x: rawX, y: rawY }) {
|
|
// Drop container that draggable has been moved into.
|
|
let newContainer = this._initialContainer._getSiblingContainerFromPosition(this, x, y);
|
|
// If we couldn't find a new container to move the item into, and the item has left its
|
|
// 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(() => {
|
|
// Notify the old container that the item has left.
|
|
this.exited.next({ item: this, container: this._dropContainer });
|
|
this._dropContainer.exit(this);
|
|
// Notify the new container that the item has entered.
|
|
this._dropContainer = newContainer;
|
|
this._dropContainer.enter(this, x, y, newContainer === this._initialContainer &&
|
|
// If we're re-entering the initial container and sorting is disabled,
|
|
// put item the into its starting index to begin with.
|
|
newContainer.sortingDisabled
|
|
? this._initialIndex
|
|
: undefined);
|
|
this.entered.next({
|
|
item: this,
|
|
container: newContainer,
|
|
currentIndex: newContainer.getItemIndex(this),
|
|
});
|
|
});
|
|
}
|
|
// Dragging may have been interrupted as a result of the events above.
|
|
if (this.isDragging()) {
|
|
this._dropContainer._startScrollingIfNecessary(rawX, rawY);
|
|
this._dropContainer._sortItem(this, x, y, this._pointerDirectionDelta);
|
|
if (this.constrainPosition) {
|
|
this._applyPreviewTransform(x, y);
|
|
}
|
|
else {
|
|
this._applyPreviewTransform(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.
|
|
*/
|
|
_createPreviewElement() {
|
|
const previewConfig = this._previewTemplate;
|
|
const previewClass = this.previewClass;
|
|
const previewTemplate = previewConfig ? previewConfig.template : null;
|
|
let preview;
|
|
if (previewTemplate && previewConfig) {
|
|
// Measure the element before we've inserted the preview
|
|
// since the insertion could throw off the measurement.
|
|
const rootRect = previewConfig.matchSize ? this._initialClientRect : null;
|
|
const viewRef = previewConfig.viewContainer.createEmbeddedView(previewTemplate, previewConfig.context);
|
|
viewRef.detectChanges();
|
|
preview = getRootNode(viewRef, this._document);
|
|
this._previewRef = viewRef;
|
|
if (previewConfig.matchSize) {
|
|
matchElementSize(preview, rootRect);
|
|
}
|
|
else {
|
|
preview.style.transform = getTransform(this._pickupPositionOnPage.x, this._pickupPositionOnPage.y);
|
|
}
|
|
}
|
|
else {
|
|
preview = deepCloneNode(this._rootElement);
|
|
matchElementSize(preview, this._initialClientRect);
|
|
if (this._initialTransform) {
|
|
preview.style.transform = this._initialTransform;
|
|
}
|
|
}
|
|
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`.
|
|
'pointer-events': 'none',
|
|
// We have to reset the margin, because it can throw off positioning relative to the viewport.
|
|
'margin': '0',
|
|
'position': 'fixed',
|
|
'top': '0',
|
|
'left': '0',
|
|
'z-index': `${this._config.zIndex || 1000}`,
|
|
}, dragImportantProperties);
|
|
toggleNativeDragInteractions(preview, false);
|
|
preview.classList.add('cdk-drag-preview');
|
|
preview.setAttribute('dir', this._direction);
|
|
if (previewClass) {
|
|
if (Array.isArray(previewClass)) {
|
|
previewClass.forEach(className => preview.classList.add(className));
|
|
}
|
|
else {
|
|
preview.classList.add(previewClass);
|
|
}
|
|
}
|
|
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.
|
|
*/
|
|
_animatePreviewToPlaceholder() {
|
|
// If the user hasn't moved yet, the transitionend event won't fire.
|
|
if (!this._hasMoved) {
|
|
return Promise.resolve();
|
|
}
|
|
const 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._applyPreviewTransform(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.
|
|
const duration = getTransformTransitionDurationInMs(this._preview);
|
|
if (duration === 0) {
|
|
return Promise.resolve();
|
|
}
|
|
return this._ngZone.runOutsideAngular(() => {
|
|
return new Promise(resolve => {
|
|
const handler = ((event) => {
|
|
if (!event ||
|
|
(_getEventTarget(event) === 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.
|
|
const timeout = setTimeout(handler, duration * 1.5);
|
|
this._preview.addEventListener('transitionend', handler);
|
|
});
|
|
});
|
|
}
|
|
/** Creates an element that will be shown instead of the current element while dragging. */
|
|
_createPlaceholderElement() {
|
|
const placeholderConfig = this._placeholderTemplate;
|
|
const placeholderTemplate = placeholderConfig ? placeholderConfig.template : null;
|
|
let placeholder;
|
|
if (placeholderTemplate) {
|
|
this._placeholderRef = placeholderConfig.viewContainer.createEmbeddedView(placeholderTemplate, placeholderConfig.context);
|
|
this._placeholderRef.detectChanges();
|
|
placeholder = getRootNode(this._placeholderRef, this._document);
|
|
}
|
|
else {
|
|
placeholder = deepCloneNode(this._rootElement);
|
|
}
|
|
// Stop pointer events on the preview so the user can't
|
|
// interact with it while the preview is animating.
|
|
placeholder.style.pointerEvents = 'none';
|
|
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.
|
|
*/
|
|
_getPointerPositionInElement(elementRect, referenceElement, event) {
|
|
const handleElement = referenceElement === this._rootElement ? null : referenceElement;
|
|
const referenceRect = handleElement ? handleElement.getBoundingClientRect() : elementRect;
|
|
const point = isTouchEvent(event) ? event.targetTouches[0] : event;
|
|
const scrollPosition = this._getViewportScrollPosition();
|
|
const x = point.pageX - referenceRect.left - scrollPosition.left;
|
|
const y = point.pageY - referenceRect.top - 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. */
|
|
_getPointerPositionOnPage(event) {
|
|
const scrollPosition = this._getViewportScrollPosition();
|
|
const point = isTouchEvent(event)
|
|
? // `touches` will be empty for start/end events so we have to fall back to `changedTouches`.
|
|
// Also note that on real devices we're guaranteed for either `touches` or `changedTouches`
|
|
// to have a value, but Firefox in device emulation mode has a bug where both can be empty
|
|
// for `touchstart` and `touchend` so we fall back to a dummy object in order to avoid
|
|
// throwing an error. The value returned here will be incorrect, but since this only
|
|
// breaks inside a developer tool and the value is only used for secondary information,
|
|
// we can get away with it. See https://bugzilla.mozilla.org/show_bug.cgi?id=1615824.
|
|
event.touches[0] || event.changedTouches[0] || { pageX: 0, pageY: 0 }
|
|
: event;
|
|
const x = point.pageX - scrollPosition.left;
|
|
const y = point.pageY - scrollPosition.top;
|
|
// if dragging SVG element, try to convert from the screen coordinate system to the SVG
|
|
// coordinate system
|
|
if (this._ownerSVGElement) {
|
|
const svgMatrix = this._ownerSVGElement.getScreenCTM();
|
|
if (svgMatrix) {
|
|
const svgPoint = this._ownerSVGElement.createSVGPoint();
|
|
svgPoint.x = x;
|
|
svgPoint.y = y;
|
|
return svgPoint.matrixTransform(svgMatrix.inverse());
|
|
}
|
|
}
|
|
return { x, y };
|
|
}
|
|
/** Gets the pointer position on the page, accounting for any position constraints. */
|
|
_getConstrainedPointerPosition(point) {
|
|
const dropContainerLock = this._dropContainer ? this._dropContainer.lockAxis : null;
|
|
let { x, y } = this.constrainPosition
|
|
? this.constrainPosition(point, this, this._initialClientRect, this._pickupPositionInElement)
|
|
: point;
|
|
if (this.lockAxis === 'x' || dropContainerLock === 'x') {
|
|
y =
|
|
this._pickupPositionOnPage.y -
|
|
(this.constrainPosition ? this._pickupPositionInElement.y : 0);
|
|
}
|
|
else if (this.lockAxis === 'y' || dropContainerLock === 'y') {
|
|
x =
|
|
this._pickupPositionOnPage.x -
|
|
(this.constrainPosition ? this._pickupPositionInElement.x : 0);
|
|
}
|
|
if (this._boundaryRect) {
|
|
// If not using a custom constrain we need to account for the pickup position in the element
|
|
// otherwise we do not need to do this, as it has already been accounted for
|
|
const { x: pickupX, y: pickupY } = !this.constrainPosition
|
|
? this._pickupPositionInElement
|
|
: { x: 0, y: 0 };
|
|
const boundaryRect = this._boundaryRect;
|
|
const { width: previewWidth, height: previewHeight } = this._getPreviewRect();
|
|
const minY = boundaryRect.top + pickupY;
|
|
const maxY = boundaryRect.bottom - (previewHeight - pickupY);
|
|
const minX = boundaryRect.left + pickupX;
|
|
const maxX = boundaryRect.right - (previewWidth - pickupX);
|
|
x = clamp$1(x, minX, maxX);
|
|
y = clamp$1(y, minY, maxY);
|
|
}
|
|
return { x, y };
|
|
}
|
|
/** Updates the current drag delta, based on the user's current pointer position on the page. */
|
|
_updatePointerDirectionDelta(pointerPositionOnPage) {
|
|
const { x, y } = pointerPositionOnPage;
|
|
const delta = this._pointerDirectionDelta;
|
|
const positionSinceLastChange = this._pointerPositionAtLastDirectionChange;
|
|
// Amount of pixels the user has dragged since the last time the direction changed.
|
|
const changeX = Math.abs(x - positionSinceLastChange.x);
|
|
const changeY = Math.abs(y - positionSinceLastChange.y);
|
|
// Because we handle pointer events on a per-pixel basis, we don't want the delta
|
|
// to change for every pixel, otherwise anything that depends on it can look erratic.
|
|
// To make the delta more consistent, we track how much the user has moved since the last
|
|
// delta change and we only update it after it has reached a certain threshold.
|
|
if (changeX > this._config.pointerDirectionChangeThreshold) {
|
|
delta.x = x > positionSinceLastChange.x ? 1 : -1;
|
|
positionSinceLastChange.x = x;
|
|
}
|
|
if (changeY > this._config.pointerDirectionChangeThreshold) {
|
|
delta.y = y > positionSinceLastChange.y ? 1 : -1;
|
|
positionSinceLastChange.y = y;
|
|
}
|
|
return delta;
|
|
}
|
|
/** Toggles the native drag interactions, based on how many handles are registered. */
|
|
_toggleNativeDragInteractions() {
|
|
if (!this._rootElement || !this._handles) {
|
|
return;
|
|
}
|
|
const shouldEnable = this._handles.length > 0 || !this.isDragging();
|
|
if (shouldEnable !== this._nativeInteractionsEnabled) {
|
|
this._nativeInteractionsEnabled = shouldEnable;
|
|
toggleNativeDragInteractions(this._rootElement, shouldEnable);
|
|
}
|
|
}
|
|
/** Removes the manually-added event listeners from the root element. */
|
|
_removeRootElementListeners(element) {
|
|
element.removeEventListener('mousedown', this._pointerDown, activeEventListenerOptions);
|
|
element.removeEventListener('touchstart', this._pointerDown, passiveEventListenerOptions);
|
|
element.removeEventListener('dragstart', this._nativeDragStart, activeEventListenerOptions);
|
|
}
|
|
/**
|
|
* Applies a `transform` to the root element, taking into account any existing transforms on it.
|
|
* @param x New transform value along the X axis.
|
|
* @param y New transform value along the Y axis.
|
|
*/
|
|
_applyRootElementTransform(x, y) {
|
|
const transform = getTransform(x, y);
|
|
const styles = this._rootElement.style;
|
|
// 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.
|
|
// Should be excluded none because none + translate3d(x, y, x) is invalid css
|
|
if (this._initialTransform == null) {
|
|
this._initialTransform =
|
|
styles.transform && styles.transform != 'none' ? styles.transform : '';
|
|
}
|
|
// 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.
|
|
styles.transform = combineTransforms(transform, this._initialTransform);
|
|
}
|
|
/**
|
|
* Applies a `transform` to the preview, taking into account any existing transforms on it.
|
|
* @param x New transform value along the X axis.
|
|
* @param y New transform value along the Y axis.
|
|
*/
|
|
_applyPreviewTransform(x, y) {
|
|
// Only apply the initial transform if the preview is a clone of the original element, otherwise
|
|
// it could be completely different and the transform might not make sense anymore.
|
|
const initialTransform = this._previewTemplate?.template ? undefined : this._initialTransform;
|
|
const transform = getTransform(x, y);
|
|
this._preview.style.transform = combineTransforms(transform, initialTransform);
|
|
}
|
|
/**
|
|
* Gets the distance that the user has dragged during the current drag sequence.
|
|
* @param currentPosition Current position of the user's pointer.
|
|
*/
|
|
_getDragDistance(currentPosition) {
|
|
const pickupPosition = this._pickupPositionOnPage;
|
|
if (pickupPosition) {
|
|
return { x: currentPosition.x - pickupPosition.x, y: currentPosition.y - pickupPosition.y };
|
|
}
|
|
return { x: 0, y: 0 };
|
|
}
|
|
/** Cleans up any cached element dimensions that we don't need after dragging has stopped. */
|
|
_cleanupCachedDimensions() {
|
|
this._boundaryRect = this._previewRect = undefined;
|
|
this._parentPositions.clear();
|
|
}
|
|
/**
|
|
* Checks whether the element is still inside its boundary after the viewport has been resized.
|
|
* If not, the position is adjusted so that the element fits again.
|
|
*/
|
|
_containInsideBoundaryOnResize() {
|
|
let { x, y } = this._passiveTransform;
|
|
if ((x === 0 && y === 0) || this.isDragging() || !this._boundaryElement) {
|
|
return;
|
|
}
|
|
// Note: don't use `_clientRectAtStart` here, because we want the latest position.
|
|
const elementRect = this._rootElement.getBoundingClientRect();
|
|
const boundaryRect = this._boundaryElement.getBoundingClientRect();
|
|
// It's possible that the element got hidden away after dragging (e.g. by switching to a
|
|
// different tab). Don't do anything in this case so we don't clear the user's position.
|
|
if ((boundaryRect.width === 0 && boundaryRect.height === 0) ||
|
|
(elementRect.width === 0 && elementRect.height === 0)) {
|
|
return;
|
|
}
|
|
const leftOverflow = boundaryRect.left - elementRect.left;
|
|
const rightOverflow = elementRect.right - boundaryRect.right;
|
|
const topOverflow = boundaryRect.top - elementRect.top;
|
|
const bottomOverflow = elementRect.bottom - boundaryRect.bottom;
|
|
// If the element has become wider than the boundary, we can't
|
|
// do much to make it fit so we just anchor it to the left.
|
|
if (boundaryRect.width > elementRect.width) {
|
|
if (leftOverflow > 0) {
|
|
x += leftOverflow;
|
|
}
|
|
if (rightOverflow > 0) {
|
|
x -= rightOverflow;
|
|
}
|
|
}
|
|
else {
|
|
x = 0;
|
|
}
|
|
// If the element has become taller than the boundary, we can't
|
|
// do much to make it fit so we just anchor it to the top.
|
|
if (boundaryRect.height > elementRect.height) {
|
|
if (topOverflow > 0) {
|
|
y += topOverflow;
|
|
}
|
|
if (bottomOverflow > 0) {
|
|
y -= bottomOverflow;
|
|
}
|
|
}
|
|
else {
|
|
y = 0;
|
|
}
|
|
if (x !== this._passiveTransform.x || y !== this._passiveTransform.y) {
|
|
this.setFreeDragPosition({ y, x });
|
|
}
|
|
}
|
|
/** Gets the drag start delay, based on the event type. */
|
|
_getDragStartDelay(event) {
|
|
const value = this.dragStartDelay;
|
|
if (typeof value === 'number') {
|
|
return value;
|
|
}
|
|
else if (isTouchEvent(event)) {
|
|
return value.touch;
|
|
}
|
|
return value ? value.mouse : 0;
|
|
}
|
|
/** Updates the internal state of the draggable element when scrolling has occurred. */
|
|
_updateOnScroll(event) {
|
|
const scrollDifference = this._parentPositions.handleScroll(event);
|
|
if (scrollDifference) {
|
|
const target = _getEventTarget(event);
|
|
// ClientRect dimensions are based on the scroll position of the page and its parent
|
|
// node so we have to update the cached boundary ClientRect if the user has scrolled.
|
|
if (this._boundaryRect &&
|
|
target !== this._boundaryElement &&
|
|
target.contains(this._boundaryElement)) {
|
|
adjustClientRect(this._boundaryRect, scrollDifference.top, scrollDifference.left);
|
|
}
|
|
this._pickupPositionOnPage.x += scrollDifference.left;
|
|
this._pickupPositionOnPage.y += scrollDifference.top;
|
|
// If we're in free drag mode, we have to update the active transform, because
|
|
// it isn't relative to the viewport like the preview inside a drop list.
|
|
if (!this._dropContainer) {
|
|
this._activeTransform.x -= scrollDifference.left;
|
|
this._activeTransform.y -= scrollDifference.top;
|
|
this._applyRootElementTransform(this._activeTransform.x, this._activeTransform.y);
|
|
}
|
|
}
|
|
}
|
|
/** Gets the scroll position of the viewport. */
|
|
_getViewportScrollPosition() {
|
|
return (this._parentPositions.positions.get(this._document)?.scrollPosition ||
|
|
this._parentPositions.getViewportScrollPosition());
|
|
}
|
|
/**
|
|
* Lazily resolves and returns the shadow root of the element. We do this in a function, rather
|
|
* than saving it in property directly on init, because we want to resolve it as late as possible
|
|
* in order to ensure that the element has been moved into the shadow DOM. Doing it inside the
|
|
* constructor might be too early if the element is inside of something like `ngFor` or `ngIf`.
|
|
*/
|
|
_getShadowRoot() {
|
|
if (this._cachedShadowRoot === undefined) {
|
|
this._cachedShadowRoot = _getShadowRoot(this._rootElement);
|
|
}
|
|
return this._cachedShadowRoot;
|
|
}
|
|
/** Gets the element into which the drag preview should be inserted. */
|
|
_getPreviewInsertionPoint(initialParent, shadowRoot) {
|
|
const previewContainer = this._previewContainer || 'global';
|
|
if (previewContainer === 'parent') {
|
|
return initialParent;
|
|
}
|
|
if (previewContainer === 'global') {
|
|
const documentRef = this._document;
|
|
// We can't use the body if the user is in fullscreen mode,
|
|
// because the preview will render under the fullscreen element.
|
|
// TODO(crisbeto): dedupe this with the `FullscreenOverlayContainer` eventually.
|
|
return (shadowRoot ||
|
|
documentRef.fullscreenElement ||
|
|
documentRef.webkitFullscreenElement ||
|
|
documentRef.mozFullScreenElement ||
|
|
documentRef.msFullscreenElement ||
|
|
documentRef.body);
|
|
}
|
|
return coerceElement(previewContainer);
|
|
}
|
|
/** Lazily resolves and returns the dimensions of the preview. */
|
|
_getPreviewRect() {
|
|
// 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._preview.getBoundingClientRect()
|
|
: this._initialClientRect;
|
|
}
|
|
return this._previewRect;
|
|
}
|
|
/** Gets a handle that is the target of an event. */
|
|
_getTargetHandle(event) {
|
|
return this._handles.find(handle => {
|
|
return event.target && (event.target === handle || handle.contains(event.target));
|
|
});
|
|
}
|
|
}
|
|
/**
|
|
* Gets a 3d `transform` that can be applied to an element.
|
|
* @param x Desired position of the element along the X axis.
|
|
* @param y Desired position of the element along the Y axis.
|
|
*/
|
|
function getTransform(x, y) {
|
|
// Round the transforms since some browsers will
|
|
// blur the elements for sub-pixel transforms.
|
|
return `translate3d(${Math.round(x)}px, ${Math.round(y)}px, 0)`;
|
|
}
|
|
/** Clamps a value between a minimum and a maximum. */
|
|
function clamp$1(value, min, max) {
|
|
return Math.max(min, Math.min(max, value));
|
|
}
|
|
/** Determines whether an event is a touch event. */
|
|
function isTouchEvent(event) {
|
|
// This function is called for every pixel that the user has dragged so we need it to be
|
|
// as fast as possible. Since we only bind mouse events and touch events, we can assume
|
|
// that if the event's name starts with `t`, it's a touch event.
|
|
return event.type[0] === 't';
|
|
}
|
|
/**
|
|
* Gets the root HTML element of an embedded view.
|
|
* If the root is not an HTML element it gets wrapped in one.
|
|
*/
|
|
function getRootNode(viewRef, _document) {
|
|
const rootNodes = viewRef.rootNodes;
|
|
if (rootNodes.length === 1 && rootNodes[0].nodeType === _document.ELEMENT_NODE) {
|
|
return rootNodes[0];
|
|
}
|
|
const wrapper = _document.createElement('div');
|
|
rootNodes.forEach(node => wrapper.appendChild(node));
|
|
return wrapper;
|
|
}
|
|
/**
|
|
* Matches the target element's size to the source's size.
|
|
* @param target Element that needs to be resized.
|
|
* @param sourceRect Dimensions of the source element.
|
|
*/
|
|
function matchElementSize(target, sourceRect) {
|
|
target.style.width = `${sourceRect.width}px`;
|
|
target.style.height = `${sourceRect.height}px`;
|
|
target.style.transform = getTransform(sourceRect.left, sourceRect.top);
|
|
}
|
|
|
|
/**
|
|
* Moves an item one index in an array to another.
|
|
* @param array Array in which to move the item.
|
|
* @param fromIndex Starting index of the item.
|
|
* @param toIndex Index to which the item should be moved.
|
|
*/
|
|
function moveItemInArray(array, fromIndex, toIndex) {
|
|
const from = clamp(fromIndex, array.length - 1);
|
|
const to = clamp(toIndex, array.length - 1);
|
|
if (from === to) {
|
|
return;
|
|
}
|
|
const target = array[from];
|
|
const delta = to < from ? -1 : 1;
|
|
for (let i = from; i !== to; i += delta) {
|
|
array[i] = array[i + delta];
|
|
}
|
|
array[to] = target;
|
|
}
|
|
/**
|
|
* Moves an item from one array to another.
|
|
* @param currentArray Array from which to transfer the item.
|
|
* @param targetArray Array into which to put the item.
|
|
* @param currentIndex Index of the item in its current array.
|
|
* @param targetIndex Index at which to insert the item.
|
|
*/
|
|
function transferArrayItem(currentArray, targetArray, currentIndex, targetIndex) {
|
|
const from = clamp(currentIndex, currentArray.length - 1);
|
|
const to = clamp(targetIndex, targetArray.length);
|
|
if (currentArray.length) {
|
|
targetArray.splice(to, 0, currentArray.splice(from, 1)[0]);
|
|
}
|
|
}
|
|
/**
|
|
* Copies an item from one array to another, leaving it in its
|
|
* original position in current array.
|
|
* @param currentArray Array from which to copy the item.
|
|
* @param targetArray Array into which is copy the item.
|
|
* @param currentIndex Index of the item in its current array.
|
|
* @param targetIndex Index at which to insert the item.
|
|
*
|
|
*/
|
|
function copyArrayItem(currentArray, targetArray, currentIndex, targetIndex) {
|
|
const to = clamp(targetIndex, targetArray.length);
|
|
if (currentArray.length) {
|
|
targetArray.splice(to, 0, currentArray[currentIndex]);
|
|
}
|
|
}
|
|
/** Clamps a number between zero and a maximum. */
|
|
function clamp(value, max) {
|
|
return Math.max(0, Math.min(max, value));
|
|
}
|
|
|
|
/**
|
|
* Strategy that only supports sorting along a single axis.
|
|
* Items are reordered using CSS transforms which allows for sorting to be animated.
|
|
* @docs-private
|
|
*/
|
|
class SingleAxisSortStrategy {
|
|
constructor(_element, _dragDropRegistry) {
|
|
this._element = _element;
|
|
this._dragDropRegistry = _dragDropRegistry;
|
|
/** Cache of the dimensions of all the items inside the container. */
|
|
this._itemPositions = [];
|
|
/** Direction in which the list is oriented. */
|
|
this.orientation = 'vertical';
|
|
/**
|
|
* Keeps track of the item that was last swapped with the dragged item, as well as what direction
|
|
* the pointer was moving in when the swap occurred and whether the user's pointer continued to
|
|
* overlap with the swapped item after the swapping occurred.
|
|
*/
|
|
this._previousSwap = {
|
|
drag: null,
|
|
delta: 0,
|
|
overlaps: false,
|
|
};
|
|
}
|
|
/**
|
|
* To be called when the drag sequence starts.
|
|
* @param items Items that are currently in the list.
|
|
*/
|
|
start(items) {
|
|
this.withItems(items);
|
|
}
|
|
/**
|
|
* To be called when an item is being sorted.
|
|
* @param item Item to be sorted.
|
|
* @param pointerX Position of the item along the X axis.
|
|
* @param pointerY Position of the item along the Y axis.
|
|
* @param pointerDelta Direction in which the pointer is moving along each axis.
|
|
*/
|
|
sort(item, pointerX, pointerY, pointerDelta) {
|
|
const siblings = this._itemPositions;
|
|
const newIndex = this._getItemIndexFromPointerPosition(item, pointerX, pointerY, pointerDelta);
|
|
if (newIndex === -1 && siblings.length > 0) {
|
|
return null;
|
|
}
|
|
const isHorizontal = this.orientation === 'horizontal';
|
|
const currentIndex = siblings.findIndex(currentItem => currentItem.drag === item);
|
|
const siblingAtNewPosition = siblings[newIndex];
|
|
const currentPosition = siblings[currentIndex].clientRect;
|
|
const newPosition = siblingAtNewPosition.clientRect;
|
|
const delta = currentIndex > newIndex ? 1 : -1;
|
|
// How many pixels the item's placeholder should be offset.
|
|
const itemOffset = this._getItemOffsetPx(currentPosition, newPosition, delta);
|
|
// How many pixels all the other items should be offset.
|
|
const siblingOffset = this._getSiblingOffsetPx(currentIndex, siblings, delta);
|
|
// Save the previous order of the items before moving the item to its new index.
|
|
// We use this to check whether an item has been moved as a result of the sorting.
|
|
const oldOrder = siblings.slice();
|
|
// Shuffle the array in place.
|
|
moveItemInArray(siblings, currentIndex, newIndex);
|
|
siblings.forEach((sibling, index) => {
|
|
// Don't do anything if the position hasn't changed.
|
|
if (oldOrder[index] === sibling) {
|
|
return;
|
|
}
|
|
const isDraggedItem = sibling.drag === item;
|
|
const offset = isDraggedItem ? itemOffset : siblingOffset;
|
|
const elementToOffset = isDraggedItem
|
|
? item.getPlaceholderElement()
|
|
: sibling.drag.getRootElement();
|
|
// Update the offset to reflect the new position.
|
|
sibling.offset += offset;
|
|
// Since we're moving the items with a `transform`, we need to adjust their cached
|
|
// client rects to reflect their new position, as well as swap their positions in the cache.
|
|
// Note that we shouldn't use `getBoundingClientRect` here to update the cache, because the
|
|
// elements may be mid-animation which will give us a wrong result.
|
|
if (isHorizontal) {
|
|
// Round the transforms since some browsers will
|
|
// blur the elements, for sub-pixel transforms.
|
|
elementToOffset.style.transform = combineTransforms(`translate3d(${Math.round(sibling.offset)}px, 0, 0)`, sibling.initialTransform);
|
|
adjustClientRect(sibling.clientRect, 0, offset);
|
|
}
|
|
else {
|
|
elementToOffset.style.transform = combineTransforms(`translate3d(0, ${Math.round(sibling.offset)}px, 0)`, sibling.initialTransform);
|
|
adjustClientRect(sibling.clientRect, offset, 0);
|
|
}
|
|
});
|
|
// Note that it's important that we do this after the client rects have been adjusted.
|
|
this._previousSwap.overlaps = isInsideClientRect(newPosition, pointerX, pointerY);
|
|
this._previousSwap.drag = siblingAtNewPosition.drag;
|
|
this._previousSwap.delta = isHorizontal ? pointerDelta.x : pointerDelta.y;
|
|
return { previousIndex: currentIndex, currentIndex: newIndex };
|
|
}
|
|
/**
|
|
* Called when an item is being moved into the container.
|
|
* @param item Item that was moved into the container.
|
|
* @param pointerX Position of the item along the X axis.
|
|
* @param pointerY Position of the item along the Y axis.
|
|
* @param index Index at which the item entered. If omitted, the container will try to figure it
|
|
* out automatically.
|
|
*/
|
|
enter(item, pointerX, pointerY, index) {
|
|
const newIndex = index == null || index < 0
|
|
? // We use the coordinates of where the item entered the drop
|
|
// zone to figure out at which index it should be inserted.
|
|
this._getItemIndexFromPointerPosition(item, pointerX, pointerY)
|
|
: index;
|
|
const activeDraggables = this._activeDraggables;
|
|
const currentIndex = activeDraggables.indexOf(item);
|
|
const placeholder = item.getPlaceholderElement();
|
|
let newPositionReference = activeDraggables[newIndex];
|
|
// If the item at the new position is the same as the item that is being dragged,
|
|
// it means that we're trying to restore the item to its initial position. In this
|
|
// case we should use the next item from the list as the reference.
|
|
if (newPositionReference === item) {
|
|
newPositionReference = activeDraggables[newIndex + 1];
|
|
}
|
|
// If we didn't find a new position reference, it means that either the item didn't start off
|
|
// in this container, or that the item requested to be inserted at the end of the list.
|
|
if (!newPositionReference &&
|
|
(newIndex == null || newIndex === -1 || newIndex < activeDraggables.length - 1) &&
|
|
this._shouldEnterAsFirstChild(pointerX, pointerY)) {
|
|
newPositionReference = activeDraggables[0];
|
|
}
|
|
// Since the item may be in the `activeDraggables` already (e.g. if the user dragged it
|
|
// into another container and back again), we have to ensure that it isn't duplicated.
|
|
if (currentIndex > -1) {
|
|
activeDraggables.splice(currentIndex, 1);
|
|
}
|
|
// Don't use items that are being dragged as a reference, because
|
|
// their element has been moved down to the bottom of the body.
|
|
if (newPositionReference && !this._dragDropRegistry.isDragging(newPositionReference)) {
|
|
const element = newPositionReference.getRootElement();
|
|
element.parentElement.insertBefore(placeholder, element);
|
|
activeDraggables.splice(newIndex, 0, item);
|
|
}
|
|
else {
|
|
coerceElement(this._element).appendChild(placeholder);
|
|
activeDraggables.push(item);
|
|
}
|
|
// The transform needs to be cleared so it doesn't throw off the measurements.
|
|
placeholder.style.transform = '';
|
|
// Note that usually `start` is called together with `enter` when an item goes into a new
|
|
// container. This will cache item positions, but we need to refresh them since the amount
|
|
// of items has changed.
|
|
this._cacheItemPositions();
|
|
}
|
|
/** Sets the items that are currently part of the list. */
|
|
withItems(items) {
|
|
this._activeDraggables = items.slice();
|
|
this._cacheItemPositions();
|
|
}
|
|
/** Assigns a sort predicate to the strategy. */
|
|
withSortPredicate(predicate) {
|
|
this._sortPredicate = predicate;
|
|
}
|
|
/** Resets the strategy to its initial state before dragging was started. */
|
|
reset() {
|
|
// TODO(crisbeto): may have to wait for the animations to finish.
|
|
this._activeDraggables.forEach(item => {
|
|
const rootElement = item.getRootElement();
|
|
if (rootElement) {
|
|
const initialTransform = this._itemPositions.find(p => p.drag === item)?.initialTransform;
|
|
rootElement.style.transform = initialTransform || '';
|
|
}
|
|
});
|
|
this._itemPositions = [];
|
|
this._activeDraggables = [];
|
|
this._previousSwap.drag = null;
|
|
this._previousSwap.delta = 0;
|
|
this._previousSwap.overlaps = false;
|
|
}
|
|
/**
|
|
* Gets a snapshot of items currently in the list.
|
|
* Can include items that we dragged in from another list.
|
|
*/
|
|
getActiveItemsSnapshot() {
|
|
return this._activeDraggables;
|
|
}
|
|
/** Gets the index of a specific item. */
|
|
getItemIndex(item) {
|
|
// Items are sorted always by top/left in the cache, however they flow differently in RTL.
|
|
// The rest of the logic still stands no matter what orientation we're in, however
|
|
// we need to invert the array when determining the index.
|
|
const items = this.orientation === 'horizontal' && this.direction === 'rtl'
|
|
? this._itemPositions.slice().reverse()
|
|
: this._itemPositions;
|
|
return items.findIndex(currentItem => currentItem.drag === item);
|
|
}
|
|
/** Used to notify the strategy that the scroll position has changed. */
|
|
updateOnScroll(topDifference, leftDifference) {
|
|
// Since we know the amount that the user has scrolled we can shift all of the
|
|
// client rectangles ourselves. This is cheaper than re-measuring everything and
|
|
// we can avoid inconsistent behavior where we might be measuring the element before
|
|
// its position has changed.
|
|
this._itemPositions.forEach(({ clientRect }) => {
|
|
adjustClientRect(clientRect, topDifference, leftDifference);
|
|
});
|
|
// We need two loops for this, because we want all of the cached
|
|
// positions to be up-to-date before we re-sort the item.
|
|
this._itemPositions.forEach(({ drag }) => {
|
|
if (this._dragDropRegistry.isDragging(drag)) {
|
|
// We need to re-sort the item manually, because the pointer move
|
|
// events won't be dispatched while the user is scrolling.
|
|
drag._sortFromLastPointerPosition();
|
|
}
|
|
});
|
|
}
|
|
/** Refreshes the position cache of the items and sibling containers. */
|
|
_cacheItemPositions() {
|
|
const isHorizontal = this.orientation === 'horizontal';
|
|
this._itemPositions = this._activeDraggables
|
|
.map(drag => {
|
|
const elementToMeasure = drag.getVisibleElement();
|
|
return {
|
|
drag,
|
|
offset: 0,
|
|
initialTransform: elementToMeasure.style.transform || '',
|
|
clientRect: getMutableClientRect(elementToMeasure),
|
|
};
|
|
})
|
|
.sort((a, b) => {
|
|
return isHorizontal
|
|
? a.clientRect.left - b.clientRect.left
|
|
: a.clientRect.top - b.clientRect.top;
|
|
});
|
|
}
|
|
/**
|
|
* Gets the offset in pixels by which the item that is being dragged should be moved.
|
|
* @param currentPosition Current position of the item.
|
|
* @param newPosition Position of the item where the current item should be moved.
|
|
* @param delta Direction in which the user is moving.
|
|
*/
|
|
_getItemOffsetPx(currentPosition, newPosition, delta) {
|
|
const isHorizontal = this.orientation === 'horizontal';
|
|
let itemOffset = isHorizontal
|
|
? newPosition.left - currentPosition.left
|
|
: newPosition.top - currentPosition.top;
|
|
// Account for differences in the item width/height.
|
|
if (delta === -1) {
|
|
itemOffset += isHorizontal
|
|
? newPosition.width - currentPosition.width
|
|
: newPosition.height - currentPosition.height;
|
|
}
|
|
return itemOffset;
|
|
}
|
|
/**
|
|
* Gets the offset in pixels by which the items that aren't being dragged should be moved.
|
|
* @param currentIndex Index of the item currently being dragged.
|
|
* @param siblings All of the items in the list.
|
|
* @param delta Direction in which the user is moving.
|
|
*/
|
|
_getSiblingOffsetPx(currentIndex, siblings, delta) {
|
|
const isHorizontal = this.orientation === 'horizontal';
|
|
const currentPosition = siblings[currentIndex].clientRect;
|
|
const immediateSibling = siblings[currentIndex + delta * -1];
|
|
let siblingOffset = currentPosition[isHorizontal ? 'width' : 'height'] * delta;
|
|
if (immediateSibling) {
|
|
const start = isHorizontal ? 'left' : 'top';
|
|
const end = isHorizontal ? 'right' : 'bottom';
|
|
// Get the spacing between the start of the current item and the end of the one immediately
|
|
// after it in the direction in which the user is dragging, or vice versa. We add it to the
|
|
// offset in order to push the element to where it will be when it's inline and is influenced
|
|
// by the `margin` of its siblings.
|
|
if (delta === -1) {
|
|
siblingOffset -= immediateSibling.clientRect[start] - currentPosition[end];
|
|
}
|
|
else {
|
|
siblingOffset += currentPosition[start] - immediateSibling.clientRect[end];
|
|
}
|
|
}
|
|
return siblingOffset;
|
|
}
|
|
/**
|
|
* Checks if pointer is entering in the first position
|
|
* @param pointerX Position of the user's pointer along the X axis.
|
|
* @param pointerY Position of the user's pointer along the Y axis.
|
|
*/
|
|
_shouldEnterAsFirstChild(pointerX, pointerY) {
|
|
if (!this._activeDraggables.length) {
|
|
return false;
|
|
}
|
|
const itemPositions = this._itemPositions;
|
|
const isHorizontal = this.orientation === 'horizontal';
|
|
// `itemPositions` are sorted by position while `activeDraggables` are sorted by child index
|
|
// check if container is using some sort of "reverse" ordering (eg: flex-direction: row-reverse)
|
|
const reversed = itemPositions[0].drag !== this._activeDraggables[0];
|
|
if (reversed) {
|
|
const lastItemRect = itemPositions[itemPositions.length - 1].clientRect;
|
|
return isHorizontal ? pointerX >= lastItemRect.right : pointerY >= lastItemRect.bottom;
|
|
}
|
|
else {
|
|
const firstItemRect = itemPositions[0].clientRect;
|
|
return isHorizontal ? pointerX <= firstItemRect.left : pointerY <= firstItemRect.top;
|
|
}
|
|
}
|
|
/**
|
|
* Gets the index of an item in the drop container, based on the position of the user's pointer.
|
|
* @param item Item that is being sorted.
|
|
* @param pointerX Position of the user's pointer along the X axis.
|
|
* @param pointerY Position of the user's pointer along the Y axis.
|
|
* @param delta Direction in which the user is moving their pointer.
|
|
*/
|
|
_getItemIndexFromPointerPosition(item, pointerX, pointerY, delta) {
|
|
const isHorizontal = this.orientation === 'horizontal';
|
|
const index = this._itemPositions.findIndex(({ drag, clientRect }) => {
|
|
// Skip the item itself.
|
|
if (drag === item) {
|
|
return false;
|
|
}
|
|
if (delta) {
|
|
const direction = isHorizontal ? delta.x : delta.y;
|
|
// If the user is still hovering over the same item as last time, their cursor hasn't left
|
|
// the item after we made the swap, and they didn't change the direction in which they're
|
|
// dragging, we don't consider it a direction swap.
|
|
if (drag === this._previousSwap.drag &&
|
|
this._previousSwap.overlaps &&
|
|
direction === this._previousSwap.delta) {
|
|
return false;
|
|
}
|
|
}
|
|
return isHorizontal
|
|
? // Round these down since most browsers report client rects with
|
|
// sub-pixel precision, whereas the pointer coordinates are rounded to pixels.
|
|
pointerX >= Math.floor(clientRect.left) && pointerX < Math.floor(clientRect.right)
|
|
: pointerY >= Math.floor(clientRect.top) && pointerY < Math.floor(clientRect.bottom);
|
|
});
|
|
return index === -1 || !this._sortPredicate(index, item) ? -1 : index;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Proximity, as a ratio to width/height, at which a
|
|
* dragged item will affect the drop container.
|
|
*/
|
|
const DROP_PROXIMITY_THRESHOLD = 0.05;
|
|
/**
|
|
* Proximity, as a ratio to width/height at which to start auto-scrolling the drop list or the
|
|
* viewport. The value comes from trying it out manually until it feels right.
|
|
*/
|
|
const SCROLL_PROXIMITY_THRESHOLD = 0.05;
|
|
/**
|
|
* Reference to a drop list. Used to manipulate or dispose of the container.
|
|
*/
|
|
class DropListRef {
|
|
constructor(element, _dragDropRegistry, _document, _ngZone, _viewportRuler) {
|
|
this._dragDropRegistry = _dragDropRegistry;
|
|
this._ngZone = _ngZone;
|
|
this._viewportRuler = _viewportRuler;
|
|
/** Whether starting a dragging sequence from this container is disabled. */
|
|
this.disabled = false;
|
|
/** Whether sorting items within the list is disabled. */
|
|
this.sortingDisabled = false;
|
|
/**
|
|
* Whether auto-scrolling the view when the user
|
|
* moves their pointer close to the edges is disabled.
|
|
*/
|
|
this.autoScrollDisabled = false;
|
|
/** Number of pixels to scroll for each frame when auto-scrolling an element. */
|
|
this.autoScrollStep = 2;
|
|
/**
|
|
* Function that is used to determine whether an item
|
|
* is allowed to be moved into a drop container.
|
|
*/
|
|
this.enterPredicate = () => true;
|
|
/** Function that is used to determine whether an item can be sorted into a particular index. */
|
|
this.sortPredicate = () => true;
|
|
/** Emits right before dragging has started. */
|
|
this.beforeStarted = new Subject();
|
|
/**
|
|
* Emits when the user has moved a new drag item into this container.
|
|
*/
|
|
this.entered = new Subject();
|
|
/**
|
|
* Emits when the user removes an item from the container
|
|
* by dragging it into another container.
|
|
*/
|
|
this.exited = new Subject();
|
|
/** Emits when the user drops an item inside the container. */
|
|
this.dropped = new Subject();
|
|
/** Emits as the user is swapping items while actively dragging. */
|
|
this.sorted = new Subject();
|
|
/** Emits when a dragging sequence is started in a list connected to the current one. */
|
|
this.receivingStarted = new Subject();
|
|
/** Emits when a dragging sequence is stopped from a list connected to the current one. */
|
|
this.receivingStopped = new Subject();
|
|
/** Whether an item in the list is being dragged. */
|
|
this._isDragging = false;
|
|
/** Draggable items in the container. */
|
|
this._draggables = [];
|
|
/** Drop lists that are connected to the current one. */
|
|
this._siblings = [];
|
|
/** Connected siblings that currently have a dragged item. */
|
|
this._activeSiblings = new Set();
|
|
/** Subscription to the window being scrolled. */
|
|
this._viewportScrollSubscription = Subscription.EMPTY;
|
|
/** Vertical direction in which the list is currently scrolling. */
|
|
this._verticalScrollDirection = 0 /* AutoScrollVerticalDirection.NONE */;
|
|
/** Horizontal direction in which the list is currently scrolling. */
|
|
this._horizontalScrollDirection = 0 /* AutoScrollHorizontalDirection.NONE */;
|
|
/** Used to signal to the current auto-scroll sequence when to stop. */
|
|
this._stopScrollTimers = new Subject();
|
|
/** Shadow root of the current element. Necessary for `elementFromPoint` to resolve correctly. */
|
|
this._cachedShadowRoot = null;
|
|
/** Starts the interval that'll auto-scroll the element. */
|
|
this._startScrollInterval = () => {
|
|
this._stopScrolling();
|
|
interval(0, animationFrameScheduler)
|
|
.pipe(takeUntil(this._stopScrollTimers))
|
|
.subscribe(() => {
|
|
const node = this._scrollNode;
|
|
const scrollStep = this.autoScrollStep;
|
|
if (this._verticalScrollDirection === 1 /* AutoScrollVerticalDirection.UP */) {
|
|
node.scrollBy(0, -scrollStep);
|
|
}
|
|
else if (this._verticalScrollDirection === 2 /* AutoScrollVerticalDirection.DOWN */) {
|
|
node.scrollBy(0, scrollStep);
|
|
}
|
|
if (this._horizontalScrollDirection === 1 /* AutoScrollHorizontalDirection.LEFT */) {
|
|
node.scrollBy(-scrollStep, 0);
|
|
}
|
|
else if (this._horizontalScrollDirection === 2 /* AutoScrollHorizontalDirection.RIGHT */) {
|
|
node.scrollBy(scrollStep, 0);
|
|
}
|
|
});
|
|
};
|
|
this.element = coerceElement(element);
|
|
this._document = _document;
|
|
this.withScrollableParents([this.element]);
|
|
_dragDropRegistry.registerDropContainer(this);
|
|
this._parentPositions = new ParentPositionTracker(_document);
|
|
this._sortStrategy = new SingleAxisSortStrategy(this.element, _dragDropRegistry);
|
|
this._sortStrategy.withSortPredicate((index, item) => this.sortPredicate(index, item, this));
|
|
}
|
|
/** Removes the drop list functionality from the DOM element. */
|
|
dispose() {
|
|
this._stopScrolling();
|
|
this._stopScrollTimers.complete();
|
|
this._viewportScrollSubscription.unsubscribe();
|
|
this.beforeStarted.complete();
|
|
this.entered.complete();
|
|
this.exited.complete();
|
|
this.dropped.complete();
|
|
this.sorted.complete();
|
|
this.receivingStarted.complete();
|
|
this.receivingStopped.complete();
|
|
this._activeSiblings.clear();
|
|
this._scrollNode = null;
|
|
this._parentPositions.clear();
|
|
this._dragDropRegistry.removeDropContainer(this);
|
|
}
|
|
/** Whether an item from this list is currently being dragged. */
|
|
isDragging() {
|
|
return this._isDragging;
|
|
}
|
|
/** Starts dragging an item. */
|
|
start() {
|
|
this._draggingStarted();
|
|
this._notifyReceivingSiblings();
|
|
}
|
|
/**
|
|
* Attempts to move an item into the container.
|
|
* @param item Item that was moved into the container.
|
|
* @param pointerX Position of the item along the X axis.
|
|
* @param pointerY Position of the item along the Y axis.
|
|
* @param index Index at which the item entered. If omitted, the container will try to figure it
|
|
* out automatically.
|
|
*/
|
|
enter(item, pointerX, pointerY, index) {
|
|
this._draggingStarted();
|
|
// If sorting is disabled, we want the item to return to its starting
|
|
// position if the user is returning it to its initial container.
|
|
if (index == null && this.sortingDisabled) {
|
|
index = this._draggables.indexOf(item);
|
|
}
|
|
this._sortStrategy.enter(item, pointerX, pointerY, index);
|
|
// Note that this usually happens inside `_draggingStarted` as well, but the dimensions
|
|
// can change when the sort strategy moves the item around inside `enter`.
|
|
this._cacheParentPositions();
|
|
// Notify siblings at the end so that the item has been inserted into the `activeDraggables`.
|
|
this._notifyReceivingSiblings();
|
|
this.entered.next({ item, container: this, currentIndex: this.getItemIndex(item) });
|
|
}
|
|
/**
|
|
* Removes an item from the container after it was dragged into another container by the user.
|
|
* @param item Item that was dragged out.
|
|
*/
|
|
exit(item) {
|
|
this._reset();
|
|
this.exited.next({ item, container: this });
|
|
}
|
|
/**
|
|
* Drops an item into this container.
|
|
* @param item Item being dropped into the container.
|
|
* @param currentIndex Index at which the item should be inserted.
|
|
* @param previousIndex Index of the item when dragging started.
|
|
* @param previousContainer Container from which the item got dragged in.
|
|
* @param isPointerOverContainer Whether the user's pointer was over the
|
|
* container when the item was dropped.
|
|
* @param distance Distance the user has dragged since the start of the dragging sequence.
|
|
* @param event Event that triggered the dropping sequence.
|
|
*
|
|
* @breaking-change 15.0.0 `previousIndex` and `event` parameters to become required.
|
|
*/
|
|
drop(item, currentIndex, previousIndex, previousContainer, isPointerOverContainer, distance, dropPoint, event = {}) {
|
|
this._reset();
|
|
this.dropped.next({
|
|
item,
|
|
currentIndex,
|
|
previousIndex,
|
|
container: this,
|
|
previousContainer,
|
|
isPointerOverContainer,
|
|
distance,
|
|
dropPoint,
|
|
event,
|
|
});
|
|
}
|
|
/**
|
|
* Sets the draggable items that are a part of this list.
|
|
* @param items Items that are a part of this list.
|
|
*/
|
|
withItems(items) {
|
|
const previousItems = this._draggables;
|
|
this._draggables = items;
|
|
items.forEach(item => item._withDropContainer(this));
|
|
if (this.isDragging()) {
|
|
const draggedItems = previousItems.filter(item => item.isDragging());
|
|
// If all of the items being dragged were removed
|
|
// from the list, abort the current drag sequence.
|
|
if (draggedItems.every(item => items.indexOf(item) === -1)) {
|
|
this._reset();
|
|
}
|
|
else {
|
|
this._sortStrategy.withItems(this._draggables);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
/** Sets the layout direction of the drop list. */
|
|
withDirection(direction) {
|
|
this._sortStrategy.direction = direction;
|
|
return this;
|
|
}
|
|
/**
|
|
* Sets the containers that are connected to this one. When two or more containers are
|
|
* connected, the user will be allowed to transfer items between them.
|
|
* @param connectedTo Other containers that the current containers should be connected to.
|
|
*/
|
|
connectedTo(connectedTo) {
|
|
this._siblings = connectedTo.slice();
|
|
return this;
|
|
}
|
|
/**
|
|
* Sets the orientation of the container.
|
|
* @param orientation New orientation for the container.
|
|
*/
|
|
withOrientation(orientation) {
|
|
// TODO(crisbeto): eventually we should be constructing the new sort strategy here based on
|
|
// the new orientation. For now we can assume that it'll always be `SingleAxisSortStrategy`.
|
|
this._sortStrategy.orientation = orientation;
|
|
return this;
|
|
}
|
|
/**
|
|
* Sets which parent elements are can be scrolled while the user is dragging.
|
|
* @param elements Elements that can be scrolled.
|
|
*/
|
|
withScrollableParents(elements) {
|
|
const element = coerceElement(this.element);
|
|
// We always allow the current element to be scrollable
|
|
// so we need to ensure that it's in the array.
|
|
this._scrollableElements =
|
|
elements.indexOf(element) === -1 ? [element, ...elements] : elements.slice();
|
|
return this;
|
|
}
|
|
/** Gets the scrollable parents that are registered with this drop container. */
|
|
getScrollableParents() {
|
|
return this._scrollableElements;
|
|
}
|
|
/**
|
|
* Figures out the index of an item in the container.
|
|
* @param item Item whose index should be determined.
|
|
*/
|
|
getItemIndex(item) {
|
|
return this._isDragging
|
|
? this._sortStrategy.getItemIndex(item)
|
|
: this._draggables.indexOf(item);
|
|
}
|
|
/**
|
|
* Whether the list is able to receive the item that
|
|
* is currently being dragged inside a connected drop list.
|
|
*/
|
|
isReceiving() {
|
|
return this._activeSiblings.size > 0;
|
|
}
|
|
/**
|
|
* Sorts an item inside the container based on its position.
|
|
* @param item Item to be sorted.
|
|
* @param pointerX Position of the item along the X axis.
|
|
* @param pointerY Position of the item along the Y axis.
|
|
* @param pointerDelta Direction in which the pointer is moving along each axis.
|
|
*/
|
|
_sortItem(item, pointerX, pointerY, pointerDelta) {
|
|
// Don't sort the item if sorting is disabled or it's out of range.
|
|
if (this.sortingDisabled ||
|
|
!this._clientRect ||
|
|
!isPointerNearClientRect(this._clientRect, DROP_PROXIMITY_THRESHOLD, pointerX, pointerY)) {
|
|
return;
|
|
}
|
|
const result = this._sortStrategy.sort(item, pointerX, pointerY, pointerDelta);
|
|
if (result) {
|
|
this.sorted.next({
|
|
previousIndex: result.previousIndex,
|
|
currentIndex: result.currentIndex,
|
|
container: this,
|
|
item,
|
|
});
|
|
}
|
|
}
|
|
/**
|
|
* Checks whether the user's pointer is close to the edges of either the
|
|
* viewport or the drop list and starts the auto-scroll sequence.
|
|
* @param pointerX User's pointer position along the x axis.
|
|
* @param pointerY User's pointer position along the y axis.
|
|
*/
|
|
_startScrollingIfNecessary(pointerX, pointerY) {
|
|
if (this.autoScrollDisabled) {
|
|
return;
|
|
}
|
|
let scrollNode;
|
|
let verticalScrollDirection = 0 /* AutoScrollVerticalDirection.NONE */;
|
|
let horizontalScrollDirection = 0 /* AutoScrollHorizontalDirection.NONE */;
|
|
// Check whether we should start scrolling any of the parent containers.
|
|
this._parentPositions.positions.forEach((position, element) => {
|
|
// We have special handling for the `document` below. Also this would be
|
|
// nicer with a for...of loop, but it requires changing a compiler flag.
|
|
if (element === this._document || !position.clientRect || scrollNode) {
|
|
return;
|
|
}
|
|
if (isPointerNearClientRect(position.clientRect, DROP_PROXIMITY_THRESHOLD, pointerX, pointerY)) {
|
|
[verticalScrollDirection, horizontalScrollDirection] = getElementScrollDirections(element, position.clientRect, pointerX, pointerY);
|
|
if (verticalScrollDirection || horizontalScrollDirection) {
|
|
scrollNode = element;
|
|
}
|
|
}
|
|
});
|
|
// Otherwise check if we can start scrolling the viewport.
|
|
if (!verticalScrollDirection && !horizontalScrollDirection) {
|
|
const { width, height } = this._viewportRuler.getViewportSize();
|
|
const clientRect = {
|
|
width,
|
|
height,
|
|
top: 0,
|
|
right: width,
|
|
bottom: height,
|
|
left: 0,
|
|
};
|
|
verticalScrollDirection = getVerticalScrollDirection(clientRect, pointerY);
|
|
horizontalScrollDirection = getHorizontalScrollDirection(clientRect, pointerX);
|
|
scrollNode = window;
|
|
}
|
|
if (scrollNode &&
|
|
(verticalScrollDirection !== this._verticalScrollDirection ||
|
|
horizontalScrollDirection !== this._horizontalScrollDirection ||
|
|
scrollNode !== this._scrollNode)) {
|
|
this._verticalScrollDirection = verticalScrollDirection;
|
|
this._horizontalScrollDirection = horizontalScrollDirection;
|
|
this._scrollNode = scrollNode;
|
|
if ((verticalScrollDirection || horizontalScrollDirection) && scrollNode) {
|
|
this._ngZone.runOutsideAngular(this._startScrollInterval);
|
|
}
|
|
else {
|
|
this._stopScrolling();
|
|
}
|
|
}
|
|
}
|
|
/** Stops any currently-running auto-scroll sequences. */
|
|
_stopScrolling() {
|
|
this._stopScrollTimers.next();
|
|
}
|
|
/** Starts the dragging sequence within the list. */
|
|
_draggingStarted() {
|
|
const styles = coerceElement(this.element).style;
|
|
this.beforeStarted.next();
|
|
this._isDragging = true;
|
|
// We need to disable scroll snapping while the user is dragging, because it breaks automatic
|
|
// scrolling. The browser seems to round the value based on the snapping points which means
|
|
// that we can't increment/decrement the scroll position.
|
|
this._initialScrollSnap = styles.msScrollSnapType || styles.scrollSnapType || '';
|
|
styles.scrollSnapType = styles.msScrollSnapType = 'none';
|
|
this._sortStrategy.start(this._draggables);
|
|
this._cacheParentPositions();
|
|
this._viewportScrollSubscription.unsubscribe();
|
|
this._listenToScrollEvents();
|
|
}
|
|
/** Caches the positions of the configured scrollable parents. */
|
|
_cacheParentPositions() {
|
|
const element = coerceElement(this.element);
|
|
this._parentPositions.cache(this._scrollableElements);
|
|
// The list element is always in the `scrollableElements`
|
|
// so we can take advantage of the cached `ClientRect`.
|
|
this._clientRect = this._parentPositions.positions.get(element).clientRect;
|
|
}
|
|
/** Resets the container to its initial state. */
|
|
_reset() {
|
|
this._isDragging = false;
|
|
const styles = coerceElement(this.element).style;
|
|
styles.scrollSnapType = styles.msScrollSnapType = this._initialScrollSnap;
|
|
this._siblings.forEach(sibling => sibling._stopReceiving(this));
|
|
this._sortStrategy.reset();
|
|
this._stopScrolling();
|
|
this._viewportScrollSubscription.unsubscribe();
|
|
this._parentPositions.clear();
|
|
}
|
|
/**
|
|
* Checks whether the user's pointer is positioned over the container.
|
|
* @param x Pointer position along the X axis.
|
|
* @param y Pointer position along the Y axis.
|
|
*/
|
|
_isOverContainer(x, y) {
|
|
return this._clientRect != null && isInsideClientRect(this._clientRect, x, y);
|
|
}
|
|
/**
|
|
* Figures out whether an item should be moved into a sibling
|
|
* drop container, based on its current position.
|
|
* @param item Drag item that is being moved.
|
|
* @param x Position of the item along the X axis.
|
|
* @param y Position of the item along the Y axis.
|
|
*/
|
|
_getSiblingContainerFromPosition(item, x, y) {
|
|
return this._siblings.find(sibling => sibling._canReceive(item, x, y));
|
|
}
|
|
/**
|
|
* Checks whether the drop list can receive the passed-in item.
|
|
* @param item Item that is being dragged into the list.
|
|
* @param x Position of the item along the X axis.
|
|
* @param y Position of the item along the Y axis.
|
|
*/
|
|
_canReceive(item, x, y) {
|
|
if (!this._clientRect ||
|
|
!isInsideClientRect(this._clientRect, x, y) ||
|
|
!this.enterPredicate(item, this)) {
|
|
return false;
|
|
}
|
|
const elementFromPoint = this._getShadowRoot().elementFromPoint(x, y);
|
|
// If there's no element at the pointer position, then
|
|
// the client rect is probably scrolled out of the view.
|
|
if (!elementFromPoint) {
|
|
return false;
|
|
}
|
|
const nativeElement = coerceElement(this.element);
|
|
// The `ClientRect`, that we're using to find the container over which the user is
|
|
// hovering, doesn't give us any information on whether the element has been scrolled
|
|
// out of the view or whether it's overlapping with other containers. This means that
|
|
// we could end up transferring the item into a container that's invisible or is positioned
|
|
// below another one. We use the result from `elementFromPoint` to get the top-most element
|
|
// at the pointer position and to find whether it's one of the intersecting drop containers.
|
|
return elementFromPoint === nativeElement || nativeElement.contains(elementFromPoint);
|
|
}
|
|
/**
|
|
* Called by one of the connected drop lists when a dragging sequence has started.
|
|
* @param sibling Sibling in which dragging has started.
|
|
*/
|
|
_startReceiving(sibling, items) {
|
|
const activeSiblings = this._activeSiblings;
|
|
if (!activeSiblings.has(sibling) &&
|
|
items.every(item => {
|
|
// Note that we have to add an exception to the `enterPredicate` for items that started off
|
|
// in this drop list. The drag ref has logic that allows an item to return to its initial
|
|
// container, if it has left the initial container and none of the connected containers
|
|
// allow it to enter. See `DragRef._updateActiveDropContainer` for more context.
|
|
return this.enterPredicate(item, this) || this._draggables.indexOf(item) > -1;
|
|
})) {
|
|
activeSiblings.add(sibling);
|
|
this._cacheParentPositions();
|
|
this._listenToScrollEvents();
|
|
this.receivingStarted.next({
|
|
initiator: sibling,
|
|
receiver: this,
|
|
items,
|
|
});
|
|
}
|
|
}
|
|
/**
|
|
* Called by a connected drop list when dragging has stopped.
|
|
* @param sibling Sibling whose dragging has stopped.
|
|
*/
|
|
_stopReceiving(sibling) {
|
|
this._activeSiblings.delete(sibling);
|
|
this._viewportScrollSubscription.unsubscribe();
|
|
this.receivingStopped.next({ initiator: sibling, receiver: this });
|
|
}
|
|
/**
|
|
* Starts listening to scroll events on the viewport.
|
|
* Used for updating the internal state of the list.
|
|
*/
|
|
_listenToScrollEvents() {
|
|
this._viewportScrollSubscription = this._dragDropRegistry
|
|
.scrolled(this._getShadowRoot())
|
|
.subscribe(event => {
|
|
if (this.isDragging()) {
|
|
const scrollDifference = this._parentPositions.handleScroll(event);
|
|
if (scrollDifference) {
|
|
this._sortStrategy.updateOnScroll(scrollDifference.top, scrollDifference.left);
|
|
}
|
|
}
|
|
else if (this.isReceiving()) {
|
|
this._cacheParentPositions();
|
|
}
|
|
});
|
|
}
|
|
/**
|
|
* Lazily resolves and returns the shadow root of the element. We do this in a function, rather
|
|
* than saving it in property directly on init, because we want to resolve it as late as possible
|
|
* in order to ensure that the element has been moved into the shadow DOM. Doing it inside the
|
|
* constructor might be too early if the element is inside of something like `ngFor` or `ngIf`.
|
|
*/
|
|
_getShadowRoot() {
|
|
if (!this._cachedShadowRoot) {
|
|
const shadowRoot = _getShadowRoot(coerceElement(this.element));
|
|
this._cachedShadowRoot = (shadowRoot || this._document);
|
|
}
|
|
return this._cachedShadowRoot;
|
|
}
|
|
/** Notifies any siblings that may potentially receive the item. */
|
|
_notifyReceivingSiblings() {
|
|
const draggedItems = this._sortStrategy
|
|
.getActiveItemsSnapshot()
|
|
.filter(item => item.isDragging());
|
|
this._siblings.forEach(sibling => sibling._startReceiving(this, draggedItems));
|
|
}
|
|
}
|
|
/**
|
|
* Gets whether the vertical auto-scroll direction of a node.
|
|
* @param clientRect Dimensions of the node.
|
|
* @param pointerY Position of the user's pointer along the y axis.
|
|
*/
|
|
function getVerticalScrollDirection(clientRect, pointerY) {
|
|
const { top, bottom, height } = clientRect;
|
|
const yThreshold = height * SCROLL_PROXIMITY_THRESHOLD;
|
|
if (pointerY >= top - yThreshold && pointerY <= top + yThreshold) {
|
|
return 1 /* AutoScrollVerticalDirection.UP */;
|
|
}
|
|
else if (pointerY >= bottom - yThreshold && pointerY <= bottom + yThreshold) {
|
|
return 2 /* AutoScrollVerticalDirection.DOWN */;
|
|
}
|
|
return 0 /* AutoScrollVerticalDirection.NONE */;
|
|
}
|
|
/**
|
|
* Gets whether the horizontal auto-scroll direction of a node.
|
|
* @param clientRect Dimensions of the node.
|
|
* @param pointerX Position of the user's pointer along the x axis.
|
|
*/
|
|
function getHorizontalScrollDirection(clientRect, pointerX) {
|
|
const { left, right, width } = clientRect;
|
|
const xThreshold = width * SCROLL_PROXIMITY_THRESHOLD;
|
|
if (pointerX >= left - xThreshold && pointerX <= left + xThreshold) {
|
|
return 1 /* AutoScrollHorizontalDirection.LEFT */;
|
|
}
|
|
else if (pointerX >= right - xThreshold && pointerX <= right + xThreshold) {
|
|
return 2 /* AutoScrollHorizontalDirection.RIGHT */;
|
|
}
|
|
return 0 /* AutoScrollHorizontalDirection.NONE */;
|
|
}
|
|
/**
|
|
* Gets the directions in which an element node should be scrolled,
|
|
* assuming that the user's pointer is already within it scrollable region.
|
|
* @param element Element for which we should calculate the scroll direction.
|
|
* @param clientRect Bounding client rectangle of the element.
|
|
* @param pointerX Position of the user's pointer along the x axis.
|
|
* @param pointerY Position of the user's pointer along the y axis.
|
|
*/
|
|
function getElementScrollDirections(element, clientRect, pointerX, pointerY) {
|
|
const computedVertical = getVerticalScrollDirection(clientRect, pointerY);
|
|
const computedHorizontal = getHorizontalScrollDirection(clientRect, pointerX);
|
|
let verticalScrollDirection = 0 /* AutoScrollVerticalDirection.NONE */;
|
|
let horizontalScrollDirection = 0 /* AutoScrollHorizontalDirection.NONE */;
|
|
// Note that we here we do some extra checks for whether the element is actually scrollable in
|
|
// a certain direction and we only assign the scroll direction if it is. We do this so that we
|
|
// can allow other elements to be scrolled, if the current element can't be scrolled anymore.
|
|
// This allows us to handle cases where the scroll regions of two scrollable elements overlap.
|
|
if (computedVertical) {
|
|
const scrollTop = element.scrollTop;
|
|
if (computedVertical === 1 /* AutoScrollVerticalDirection.UP */) {
|
|
if (scrollTop > 0) {
|
|
verticalScrollDirection = 1 /* AutoScrollVerticalDirection.UP */;
|
|
}
|
|
}
|
|
else if (element.scrollHeight - scrollTop > element.clientHeight) {
|
|
verticalScrollDirection = 2 /* AutoScrollVerticalDirection.DOWN */;
|
|
}
|
|
}
|
|
if (computedHorizontal) {
|
|
const scrollLeft = element.scrollLeft;
|
|
if (computedHorizontal === 1 /* AutoScrollHorizontalDirection.LEFT */) {
|
|
if (scrollLeft > 0) {
|
|
horizontalScrollDirection = 1 /* AutoScrollHorizontalDirection.LEFT */;
|
|
}
|
|
}
|
|
else if (element.scrollWidth - scrollLeft > element.clientWidth) {
|
|
horizontalScrollDirection = 2 /* AutoScrollHorizontalDirection.RIGHT */;
|
|
}
|
|
}
|
|
return [verticalScrollDirection, horizontalScrollDirection];
|
|
}
|
|
|
|
/** Event options that can be used to bind an active, capturing event. */
|
|
const activeCapturingEventOptions = normalizePassiveListenerOptions({
|
|
passive: false,
|
|
capture: true,
|
|
});
|
|
/**
|
|
* Service that keeps track of all the drag item and drop container
|
|
* instances, and manages global event listeners on the `document`.
|
|
* @docs-private
|
|
*/
|
|
// Note: this class is generic, rather than referencing CdkDrag and CdkDropList directly, in order
|
|
// to avoid circular imports. If we were to reference them here, importing the registry into the
|
|
// classes that are registering themselves will introduce a circular import.
|
|
class DragDropRegistry {
|
|
constructor(_ngZone, _document) {
|
|
this._ngZone = _ngZone;
|
|
/** Registered drop container instances. */
|
|
this._dropInstances = new Set();
|
|
/** Registered drag item instances. */
|
|
this._dragInstances = new Set();
|
|
/** Drag item instances that are currently being dragged. */
|
|
this._activeDragInstances = [];
|
|
/** Keeps track of the event listeners that we've bound to the `document`. */
|
|
this._globalListeners = new Map();
|
|
/**
|
|
* Predicate function to check if an item is being dragged. Moved out into a property,
|
|
* because it'll be called a lot and we don't want to create a new function every time.
|
|
*/
|
|
this._draggingPredicate = (item) => item.isDragging();
|
|
/**
|
|
* Emits the `touchmove` or `mousemove` events that are dispatched
|
|
* while the user is dragging a drag item instance.
|
|
*/
|
|
this.pointerMove = new Subject();
|
|
/**
|
|
* Emits the `touchend` or `mouseup` events that are dispatched
|
|
* while the user is dragging a drag item instance.
|
|
*/
|
|
this.pointerUp = new Subject();
|
|
/**
|
|
* Emits when the viewport has been scrolled while the user is dragging an item.
|
|
* @deprecated To be turned into a private member. Use the `scrolled` method instead.
|
|
* @breaking-change 13.0.0
|
|
*/
|
|
this.scroll = new Subject();
|
|
/**
|
|
* Event listener that will prevent the default browser action while the user is dragging.
|
|
* @param event Event whose default action should be prevented.
|
|
*/
|
|
this._preventDefaultWhileDragging = (event) => {
|
|
if (this._activeDragInstances.length > 0) {
|
|
event.preventDefault();
|
|
}
|
|
};
|
|
/** Event listener for `touchmove` that is bound even if no dragging is happening. */
|
|
this._persistentTouchmoveListener = (event) => {
|
|
if (this._activeDragInstances.length > 0) {
|
|
// Note that we only want to prevent the default action after dragging has actually started.
|
|
// Usually this is the same time at which the item is added to the `_activeDragInstances`,
|
|
// but it could be pushed back if the user has set up a drag delay or threshold.
|
|
if (this._activeDragInstances.some(this._draggingPredicate)) {
|
|
event.preventDefault();
|
|
}
|
|
this.pointerMove.next(event);
|
|
}
|
|
};
|
|
this._document = _document;
|
|
}
|
|
/** Adds a drop container to the registry. */
|
|
registerDropContainer(drop) {
|
|
if (!this._dropInstances.has(drop)) {
|
|
this._dropInstances.add(drop);
|
|
}
|
|
}
|
|
/** Adds a drag item instance to the registry. */
|
|
registerDragItem(drag) {
|
|
this._dragInstances.add(drag);
|
|
// The `touchmove` event gets bound once, ahead of time, because WebKit
|
|
// won't preventDefault on a dynamically-added `touchmove` listener.
|
|
// See https://bugs.webkit.org/show_bug.cgi?id=184250.
|
|
if (this._dragInstances.size === 1) {
|
|
this._ngZone.runOutsideAngular(() => {
|
|
// The event handler has to be explicitly active,
|
|
// because newer browsers make it passive by default.
|
|
this._document.addEventListener('touchmove', this._persistentTouchmoveListener, activeCapturingEventOptions);
|
|
});
|
|
}
|
|
}
|
|
/** Removes a drop container from the registry. */
|
|
removeDropContainer(drop) {
|
|
this._dropInstances.delete(drop);
|
|
}
|
|
/** Removes a drag item instance from the registry. */
|
|
removeDragItem(drag) {
|
|
this._dragInstances.delete(drag);
|
|
this.stopDragging(drag);
|
|
if (this._dragInstances.size === 0) {
|
|
this._document.removeEventListener('touchmove', this._persistentTouchmoveListener, activeCapturingEventOptions);
|
|
}
|
|
}
|
|
/**
|
|
* Starts the dragging sequence for a drag instance.
|
|
* @param drag Drag instance which is being dragged.
|
|
* @param event Event that initiated the dragging.
|
|
*/
|
|
startDragging(drag, event) {
|
|
// Do not process the same drag twice to avoid memory leaks and redundant listeners
|
|
if (this._activeDragInstances.indexOf(drag) > -1) {
|
|
return;
|
|
}
|
|
this._activeDragInstances.push(drag);
|
|
if (this._activeDragInstances.length === 1) {
|
|
const isTouchEvent = event.type.startsWith('touch');
|
|
// We explicitly bind __active__ listeners here, because newer browsers will default to
|
|
// passive ones for `mousemove` and `touchmove`. The events need to be active, because we
|
|
// use `preventDefault` to prevent the page from scrolling while the user is dragging.
|
|
this._globalListeners
|
|
.set(isTouchEvent ? 'touchend' : 'mouseup', {
|
|
handler: (e) => this.pointerUp.next(e),
|
|
options: true,
|
|
})
|
|
.set('scroll', {
|
|
handler: (e) => this.scroll.next(e),
|
|
// Use capturing so that we pick up scroll changes in any scrollable nodes that aren't
|
|
// the document. See https://github.com/angular/components/issues/17144.
|
|
options: true,
|
|
})
|
|
// Preventing the default action on `mousemove` isn't enough to disable text selection
|
|
// on Safari so we need to prevent the selection event as well. Alternatively this can
|
|
// be done by setting `user-select: none` on the `body`, however it has causes a style
|
|
// recalculation which can be expensive on pages with a lot of elements.
|
|
.set('selectstart', {
|
|
handler: this._preventDefaultWhileDragging,
|
|
options: activeCapturingEventOptions,
|
|
});
|
|
// We don't have to bind a move event for touch drag sequences, because
|
|
// we already have a persistent global one bound from `registerDragItem`.
|
|
if (!isTouchEvent) {
|
|
this._globalListeners.set('mousemove', {
|
|
handler: (e) => this.pointerMove.next(e),
|
|
options: activeCapturingEventOptions,
|
|
});
|
|
}
|
|
this._ngZone.runOutsideAngular(() => {
|
|
this._globalListeners.forEach((config, name) => {
|
|
this._document.addEventListener(name, config.handler, config.options);
|
|
});
|
|
});
|
|
}
|
|
}
|
|
/** Stops dragging a drag item instance. */
|
|
stopDragging(drag) {
|
|
const index = this._activeDragInstances.indexOf(drag);
|
|
if (index > -1) {
|
|
this._activeDragInstances.splice(index, 1);
|
|
if (this._activeDragInstances.length === 0) {
|
|
this._clearGlobalListeners();
|
|
}
|
|
}
|
|
}
|
|
/** Gets whether a drag item instance is currently being dragged. */
|
|
isDragging(drag) {
|
|
return this._activeDragInstances.indexOf(drag) > -1;
|
|
}
|
|
/**
|
|
* Gets a stream that will emit when any element on the page is scrolled while an item is being
|
|
* dragged.
|
|
* @param shadowRoot Optional shadow root that the current dragging sequence started from.
|
|
* Top-level listeners won't pick up events coming from the shadow DOM so this parameter can
|
|
* be used to include an additional top-level listener at the shadow root level.
|
|
*/
|
|
scrolled(shadowRoot) {
|
|
const streams = [this.scroll];
|
|
if (shadowRoot && shadowRoot !== this._document) {
|
|
// Note that this is basically the same as `fromEvent` from rxjs, but we do it ourselves,
|
|
// because we want to guarantee that the event is bound outside of the `NgZone`. With
|
|
// `fromEvent` it'll only happen if the subscription is outside the `NgZone`.
|
|
streams.push(new Observable((observer) => {
|
|
return this._ngZone.runOutsideAngular(() => {
|
|
const eventOptions = true;
|
|
const callback = (event) => {
|
|
if (this._activeDragInstances.length) {
|
|
observer.next(event);
|
|
}
|
|
};
|
|
shadowRoot.addEventListener('scroll', callback, eventOptions);
|
|
return () => {
|
|
shadowRoot.removeEventListener('scroll', callback, eventOptions);
|
|
};
|
|
});
|
|
}));
|
|
}
|
|
return merge(...streams);
|
|
}
|
|
ngOnDestroy() {
|
|
this._dragInstances.forEach(instance => this.removeDragItem(instance));
|
|
this._dropInstances.forEach(instance => this.removeDropContainer(instance));
|
|
this._clearGlobalListeners();
|
|
this.pointerMove.complete();
|
|
this.pointerUp.complete();
|
|
}
|
|
/** Clears out the global event listeners from the `document`. */
|
|
_clearGlobalListeners() {
|
|
this._globalListeners.forEach((config, name) => {
|
|
this._document.removeEventListener(name, config.handler, config.options);
|
|
});
|
|
this._globalListeners.clear();
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDropRegistry, deps: [{ token: i0.NgZone }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable }); }
|
|
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDropRegistry, providedIn: 'root' }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDropRegistry, decorators: [{
|
|
type: Injectable,
|
|
args: [{ providedIn: 'root' }]
|
|
}], ctorParameters: function () { return [{ type: i0.NgZone }, { type: undefined, decorators: [{
|
|
type: Inject,
|
|
args: [DOCUMENT]
|
|
}] }]; } });
|
|
|
|
/** Default configuration to be used when creating a `DragRef`. */
|
|
const DEFAULT_CONFIG = {
|
|
dragStartThreshold: 5,
|
|
pointerDirectionChangeThreshold: 5,
|
|
};
|
|
/**
|
|
* Service that allows for drag-and-drop functionality to be attached to DOM elements.
|
|
*/
|
|
class DragDrop {
|
|
constructor(_document, _ngZone, _viewportRuler, _dragDropRegistry) {
|
|
this._document = _document;
|
|
this._ngZone = _ngZone;
|
|
this._viewportRuler = _viewportRuler;
|
|
this._dragDropRegistry = _dragDropRegistry;
|
|
}
|
|
/**
|
|
* Turns an element into a draggable item.
|
|
* @param element Element to which to attach the dragging functionality.
|
|
* @param config Object used to configure the dragging behavior.
|
|
*/
|
|
createDrag(element, config = DEFAULT_CONFIG) {
|
|
return new DragRef(element, config, this._document, this._ngZone, this._viewportRuler, this._dragDropRegistry);
|
|
}
|
|
/**
|
|
* Turns an element into a drop list.
|
|
* @param element Element to which to attach the drop list functionality.
|
|
*/
|
|
createDropList(element) {
|
|
return new DropListRef(element, this._dragDropRegistry, this._document, this._ngZone, this._viewportRuler);
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDrop, deps: [{ token: DOCUMENT }, { token: i0.NgZone }, { token: i1.ViewportRuler }, { token: DragDropRegistry }], target: i0.ɵɵFactoryTarget.Injectable }); }
|
|
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDrop, providedIn: 'root' }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDrop, decorators: [{
|
|
type: Injectable,
|
|
args: [{ providedIn: 'root' }]
|
|
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
|
|
type: Inject,
|
|
args: [DOCUMENT]
|
|
}] }, { type: i0.NgZone }, { type: i1.ViewportRuler }, { type: DragDropRegistry }]; } });
|
|
|
|
/**
|
|
* Injection token that can be used for a `CdkDrag` to provide itself as a parent to the
|
|
* drag-specific child directive (`CdkDragHandle`, `CdkDragPreview` etc.). Used primarily
|
|
* to avoid circular imports.
|
|
* @docs-private
|
|
*/
|
|
const CDK_DRAG_PARENT = new InjectionToken('CDK_DRAG_PARENT');
|
|
|
|
/**
|
|
* Asserts that a particular node is an element.
|
|
* @param node Node to be checked.
|
|
* @param name Name to attach to the error message.
|
|
*/
|
|
function assertElementNode(node, name) {
|
|
if (node.nodeType !== 1) {
|
|
throw Error(`${name} must be attached to an element node. ` + `Currently attached to "${node.nodeName}".`);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Injection token that can be used to reference instances of `CdkDragHandle`. It serves as
|
|
* alternative token to the actual `CdkDragHandle` class which could cause unnecessary
|
|
* retention of the class and its directive metadata.
|
|
*/
|
|
const CDK_DRAG_HANDLE = new InjectionToken('CdkDragHandle');
|
|
/** Handle that can be used to drag a CdkDrag instance. */
|
|
class CdkDragHandle {
|
|
/** Whether starting to drag through this handle is disabled. */
|
|
get disabled() {
|
|
return this._disabled;
|
|
}
|
|
set disabled(value) {
|
|
this._disabled = coerceBooleanProperty(value);
|
|
this._stateChanges.next(this);
|
|
}
|
|
constructor(element, parentDrag) {
|
|
this.element = element;
|
|
/** Emits when the state of the handle has changed. */
|
|
this._stateChanges = new Subject();
|
|
this._disabled = false;
|
|
if (typeof ngDevMode === 'undefined' || ngDevMode) {
|
|
assertElementNode(element.nativeElement, 'cdkDragHandle');
|
|
}
|
|
this._parentDrag = parentDrag;
|
|
}
|
|
ngOnDestroy() {
|
|
this._stateChanges.complete();
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDragHandle, deps: [{ token: i0.ElementRef }, { token: CDK_DRAG_PARENT, optional: true, skipSelf: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkDragHandle, isStandalone: true, selector: "[cdkDragHandle]", inputs: { disabled: ["cdkDragHandleDisabled", "disabled"] }, host: { classAttribute: "cdk-drag-handle" }, providers: [{ provide: CDK_DRAG_HANDLE, useExisting: CdkDragHandle }], ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDragHandle, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdkDragHandle]',
|
|
standalone: true,
|
|
host: {
|
|
'class': 'cdk-drag-handle',
|
|
},
|
|
providers: [{ provide: CDK_DRAG_HANDLE, useExisting: CdkDragHandle }],
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: undefined, decorators: [{
|
|
type: Inject,
|
|
args: [CDK_DRAG_PARENT]
|
|
}, {
|
|
type: Optional
|
|
}, {
|
|
type: SkipSelf
|
|
}] }]; }, propDecorators: { disabled: [{
|
|
type: Input,
|
|
args: ['cdkDragHandleDisabled']
|
|
}] } });
|
|
|
|
/**
|
|
* Injection token that can be used to reference instances of `CdkDragPlaceholder`. It serves as
|
|
* alternative token to the actual `CdkDragPlaceholder` class which could cause unnecessary
|
|
* retention of the class and its directive metadata.
|
|
*/
|
|
const CDK_DRAG_PLACEHOLDER = new InjectionToken('CdkDragPlaceholder');
|
|
/**
|
|
* Element that will be used as a template for the placeholder of a CdkDrag when
|
|
* it is being dragged. The placeholder is displayed in place of the element being dragged.
|
|
*/
|
|
class CdkDragPlaceholder {
|
|
constructor(templateRef) {
|
|
this.templateRef = templateRef;
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDragPlaceholder, deps: [{ token: i0.TemplateRef }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkDragPlaceholder, isStandalone: true, selector: "ng-template[cdkDragPlaceholder]", inputs: { data: "data" }, providers: [{ provide: CDK_DRAG_PLACEHOLDER, useExisting: CdkDragPlaceholder }], ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDragPlaceholder, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: 'ng-template[cdkDragPlaceholder]',
|
|
standalone: true,
|
|
providers: [{ provide: CDK_DRAG_PLACEHOLDER, useExisting: CdkDragPlaceholder }],
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.TemplateRef }]; }, propDecorators: { data: [{
|
|
type: Input
|
|
}] } });
|
|
|
|
/**
|
|
* Injection token that can be used to reference instances of `CdkDragPreview`. It serves as
|
|
* alternative token to the actual `CdkDragPreview` class which could cause unnecessary
|
|
* retention of the class and its directive metadata.
|
|
*/
|
|
const CDK_DRAG_PREVIEW = new InjectionToken('CdkDragPreview');
|
|
/**
|
|
* Element that will be used as a template for the preview
|
|
* of a CdkDrag when it is being dragged.
|
|
*/
|
|
class CdkDragPreview {
|
|
/** Whether the preview should preserve the same size as the item that is being dragged. */
|
|
get matchSize() {
|
|
return this._matchSize;
|
|
}
|
|
set matchSize(value) {
|
|
this._matchSize = coerceBooleanProperty(value);
|
|
}
|
|
constructor(templateRef) {
|
|
this.templateRef = templateRef;
|
|
this._matchSize = false;
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDragPreview, deps: [{ token: i0.TemplateRef }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkDragPreview, isStandalone: true, selector: "ng-template[cdkDragPreview]", inputs: { data: "data", matchSize: "matchSize" }, providers: [{ provide: CDK_DRAG_PREVIEW, useExisting: CdkDragPreview }], ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDragPreview, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: 'ng-template[cdkDragPreview]',
|
|
standalone: true,
|
|
providers: [{ provide: CDK_DRAG_PREVIEW, useExisting: CdkDragPreview }],
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.TemplateRef }]; }, propDecorators: { data: [{
|
|
type: Input
|
|
}], matchSize: [{
|
|
type: Input
|
|
}] } });
|
|
|
|
/**
|
|
* Injection token that can be used to configure the
|
|
* behavior of the drag&drop-related components.
|
|
*/
|
|
const CDK_DRAG_CONFIG = new InjectionToken('CDK_DRAG_CONFIG');
|
|
|
|
const DRAG_HOST_CLASS = 'cdk-drag';
|
|
/**
|
|
* Injection token that can be used to reference instances of `CdkDropList`. It serves as
|
|
* alternative token to the actual `CdkDropList` class which could cause unnecessary
|
|
* retention of the class and its directive metadata.
|
|
*/
|
|
const CDK_DROP_LIST = new InjectionToken('CdkDropList');
|
|
/** Element that can be moved inside a CdkDropList container. */
|
|
class CdkDrag {
|
|
static { this._dragInstances = []; }
|
|
/** Whether starting to drag this element is disabled. */
|
|
get disabled() {
|
|
return this._disabled || (this.dropContainer && this.dropContainer.disabled);
|
|
}
|
|
set disabled(value) {
|
|
this._disabled = coerceBooleanProperty(value);
|
|
this._dragRef.disabled = this._disabled;
|
|
}
|
|
constructor(
|
|
/** Element that the draggable is attached to. */
|
|
element,
|
|
/** Droppable container that the draggable is a part of. */
|
|
dropContainer,
|
|
/**
|
|
* @deprecated `_document` parameter no longer being used and will be removed.
|
|
* @breaking-change 12.0.0
|
|
*/
|
|
_document, _ngZone, _viewContainerRef, config, _dir, dragDrop, _changeDetectorRef, _selfHandle, _parentDrag) {
|
|
this.element = element;
|
|
this.dropContainer = dropContainer;
|
|
this._ngZone = _ngZone;
|
|
this._viewContainerRef = _viewContainerRef;
|
|
this._dir = _dir;
|
|
this._changeDetectorRef = _changeDetectorRef;
|
|
this._selfHandle = _selfHandle;
|
|
this._parentDrag = _parentDrag;
|
|
this._destroyed = new Subject();
|
|
/** Emits when the user starts dragging the item. */
|
|
this.started = new EventEmitter();
|
|
/** Emits when the user has released a drag item, before any animations have started. */
|
|
this.released = new EventEmitter();
|
|
/** Emits when the user stops dragging an item in the container. */
|
|
this.ended = new EventEmitter();
|
|
/** Emits when the user has moved the item into a new container. */
|
|
this.entered = new EventEmitter();
|
|
/** Emits when the user removes the item its container by dragging it into another container. */
|
|
this.exited = new EventEmitter();
|
|
/** Emits when the user drops the item inside a container. */
|
|
this.dropped = new EventEmitter();
|
|
/**
|
|
* 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 Observable((observer) => {
|
|
const subscription = this._dragRef.moved
|
|
.pipe(map(movedEvent => ({
|
|
source: this,
|
|
pointerPosition: movedEvent.pointerPosition,
|
|
event: movedEvent.event,
|
|
delta: movedEvent.delta,
|
|
distance: movedEvent.distance,
|
|
})))
|
|
.subscribe(observer);
|
|
return () => {
|
|
subscription.unsubscribe();
|
|
};
|
|
});
|
|
this._dragRef = dragDrop.createDrag(element, {
|
|
dragStartThreshold: config && config.dragStartThreshold != null ? config.dragStartThreshold : 5,
|
|
pointerDirectionChangeThreshold: config && config.pointerDirectionChangeThreshold != null
|
|
? config.pointerDirectionChangeThreshold
|
|
: 5,
|
|
zIndex: config?.zIndex,
|
|
});
|
|
this._dragRef.data = this;
|
|
// We have to keep track of the drag instances in order to be able to match an element to
|
|
// a drag instance. We can't go through the global registry of `DragRef`, because the root
|
|
// element could be different.
|
|
CdkDrag._dragInstances.push(this);
|
|
if (config) {
|
|
this._assignDefaults(config);
|
|
}
|
|
// Note that usually the container is assigned when the drop list is picks up the item, but in
|
|
// some cases (mainly transplanted views with OnPush, see #18341) we may end up in a situation
|
|
// where there are no items on the first change detection pass, but the items get picked up as
|
|
// soon as the user triggers another pass by dragging. This is a problem, because the item would
|
|
// have to switch from standalone mode to drag mode in the middle of the dragging sequence which
|
|
// is too late since the two modes save different kinds of information. We work around it by
|
|
// assigning the drop container both from here and the list.
|
|
if (dropContainer) {
|
|
this._dragRef._withDropContainer(dropContainer._dropListRef);
|
|
dropContainer.addItem(this);
|
|
}
|
|
this._syncInputs(this._dragRef);
|
|
this._handleEvents(this._dragRef);
|
|
}
|
|
/**
|
|
* Returns the element that is being used as a placeholder
|
|
* while the current element is being dragged.
|
|
*/
|
|
getPlaceholderElement() {
|
|
return this._dragRef.getPlaceholderElement();
|
|
}
|
|
/** Returns the root draggable element. */
|
|
getRootElement() {
|
|
return this._dragRef.getRootElement();
|
|
}
|
|
/** Resets a standalone drag item to its initial position. */
|
|
reset() {
|
|
this._dragRef.reset();
|
|
}
|
|
/**
|
|
* Gets the pixel coordinates of the draggable outside of a drop container.
|
|
*/
|
|
getFreeDragPosition() {
|
|
return this._dragRef.getFreeDragPosition();
|
|
}
|
|
/**
|
|
* Sets the current position in pixels the draggable outside of a drop container.
|
|
* @param value New position to be set.
|
|
*/
|
|
setFreeDragPosition(value) {
|
|
this._dragRef.setFreeDragPosition(value);
|
|
}
|
|
ngAfterViewInit() {
|
|
// Normally this isn't in the zone, but it can cause major performance regressions for apps
|
|
// using `zone-patch-rxjs` because it'll trigger a change detection when it unsubscribes.
|
|
this._ngZone.runOutsideAngular(() => {
|
|
// We need to wait for the zone to stabilize, in order for the reference
|
|
// element to be in the proper place in the DOM. This is mostly relevant
|
|
// for draggable elements inside portals since they get stamped out in
|
|
// their original DOM position and then they get transferred to the portal.
|
|
this._ngZone.onStable.pipe(take(1), takeUntil(this._destroyed)).subscribe(() => {
|
|
this._updateRootElement();
|
|
this._setupHandlesListener();
|
|
if (this.freeDragPosition) {
|
|
this._dragRef.setFreeDragPosition(this.freeDragPosition);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
ngOnChanges(changes) {
|
|
const rootSelectorChange = changes['rootElementSelector'];
|
|
const positionChange = changes['freeDragPosition'];
|
|
// We don't have to react to the first change since it's being
|
|
// handled in `ngAfterViewInit` where it needs to be deferred.
|
|
if (rootSelectorChange && !rootSelectorChange.firstChange) {
|
|
this._updateRootElement();
|
|
}
|
|
// Skip the first change since it's being handled in `ngAfterViewInit`.
|
|
if (positionChange && !positionChange.firstChange && this.freeDragPosition) {
|
|
this._dragRef.setFreeDragPosition(this.freeDragPosition);
|
|
}
|
|
}
|
|
ngOnDestroy() {
|
|
if (this.dropContainer) {
|
|
this.dropContainer.removeItem(this);
|
|
}
|
|
const index = CdkDrag._dragInstances.indexOf(this);
|
|
if (index > -1) {
|
|
CdkDrag._dragInstances.splice(index, 1);
|
|
}
|
|
// Unnecessary in most cases, but used to avoid extra change detections with `zone-paths-rxjs`.
|
|
this._ngZone.runOutsideAngular(() => {
|
|
this._destroyed.next();
|
|
this._destroyed.complete();
|
|
this._dragRef.dispose();
|
|
});
|
|
}
|
|
/** Syncs the root element with the `DragRef`. */
|
|
_updateRootElement() {
|
|
const element = this.element.nativeElement;
|
|
let rootElement = element;
|
|
if (this.rootElementSelector) {
|
|
rootElement =
|
|
element.closest !== undefined
|
|
? element.closest(this.rootElementSelector)
|
|
: // Comment tag doesn't have closest method, so use parent's one.
|
|
element.parentElement?.closest(this.rootElementSelector);
|
|
}
|
|
if (rootElement && (typeof ngDevMode === 'undefined' || ngDevMode)) {
|
|
assertElementNode(rootElement, 'cdkDrag');
|
|
}
|
|
this._dragRef.withRootElement(rootElement || element);
|
|
}
|
|
/** Gets the boundary element, based on the `boundaryElement` value. */
|
|
_getBoundaryElement() {
|
|
const boundary = this.boundaryElement;
|
|
if (!boundary) {
|
|
return null;
|
|
}
|
|
if (typeof boundary === 'string') {
|
|
return this.element.nativeElement.closest(boundary);
|
|
}
|
|
return coerceElement(boundary);
|
|
}
|
|
/** Syncs the inputs of the CdkDrag with the options of the underlying DragRef. */
|
|
_syncInputs(ref) {
|
|
ref.beforeStarted.subscribe(() => {
|
|
if (!ref.isDragging()) {
|
|
const dir = this._dir;
|
|
const dragStartDelay = this.dragStartDelay;
|
|
const placeholder = this._placeholderTemplate
|
|
? {
|
|
template: this._placeholderTemplate.templateRef,
|
|
context: this._placeholderTemplate.data,
|
|
viewContainer: this._viewContainerRef,
|
|
}
|
|
: null;
|
|
const preview = this._previewTemplate
|
|
? {
|
|
template: this._previewTemplate.templateRef,
|
|
context: this._previewTemplate.data,
|
|
matchSize: this._previewTemplate.matchSize,
|
|
viewContainer: this._viewContainerRef,
|
|
}
|
|
: null;
|
|
ref.disabled = this.disabled;
|
|
ref.lockAxis = this.lockAxis;
|
|
ref.dragStartDelay =
|
|
typeof dragStartDelay === 'object' && dragStartDelay
|
|
? dragStartDelay
|
|
: coerceNumberProperty(dragStartDelay);
|
|
ref.constrainPosition = this.constrainPosition;
|
|
ref.previewClass = this.previewClass;
|
|
ref
|
|
.withBoundaryElement(this._getBoundaryElement())
|
|
.withPlaceholderTemplate(placeholder)
|
|
.withPreviewTemplate(preview)
|
|
.withPreviewContainer(this.previewContainer || 'global');
|
|
if (dir) {
|
|
ref.withDirection(dir.value);
|
|
}
|
|
}
|
|
});
|
|
// This only needs to be resolved once.
|
|
ref.beforeStarted.pipe(take(1)).subscribe(() => {
|
|
// If we managed to resolve a parent through DI, use it.
|
|
if (this._parentDrag) {
|
|
ref.withParent(this._parentDrag._dragRef);
|
|
return;
|
|
}
|
|
// Otherwise fall back to resolving the parent by looking up the DOM. This can happen if
|
|
// the item was projected into another item by something like `ngTemplateOutlet`.
|
|
let parent = this.element.nativeElement.parentElement;
|
|
while (parent) {
|
|
if (parent.classList.contains(DRAG_HOST_CLASS)) {
|
|
ref.withParent(CdkDrag._dragInstances.find(drag => {
|
|
return drag.element.nativeElement === parent;
|
|
})?._dragRef || null);
|
|
break;
|
|
}
|
|
parent = parent.parentElement;
|
|
}
|
|
});
|
|
}
|
|
/** Handles the events from the underlying `DragRef`. */
|
|
_handleEvents(ref) {
|
|
ref.started.subscribe(startEvent => {
|
|
this.started.emit({ source: this, event: startEvent.event });
|
|
// Since all of these events run outside of change detection,
|
|
// we need to ensure that everything is marked correctly.
|
|
this._changeDetectorRef.markForCheck();
|
|
});
|
|
ref.released.subscribe(releaseEvent => {
|
|
this.released.emit({ source: this, event: releaseEvent.event });
|
|
});
|
|
ref.ended.subscribe(endEvent => {
|
|
this.ended.emit({
|
|
source: this,
|
|
distance: endEvent.distance,
|
|
dropPoint: endEvent.dropPoint,
|
|
event: endEvent.event,
|
|
});
|
|
// Since all of these events run outside of change detection,
|
|
// we need to ensure that everything is marked correctly.
|
|
this._changeDetectorRef.markForCheck();
|
|
});
|
|
ref.entered.subscribe(enterEvent => {
|
|
this.entered.emit({
|
|
container: enterEvent.container.data,
|
|
item: this,
|
|
currentIndex: enterEvent.currentIndex,
|
|
});
|
|
});
|
|
ref.exited.subscribe(exitEvent => {
|
|
this.exited.emit({
|
|
container: exitEvent.container.data,
|
|
item: this,
|
|
});
|
|
});
|
|
ref.dropped.subscribe(dropEvent => {
|
|
this.dropped.emit({
|
|
previousIndex: dropEvent.previousIndex,
|
|
currentIndex: dropEvent.currentIndex,
|
|
previousContainer: dropEvent.previousContainer.data,
|
|
container: dropEvent.container.data,
|
|
isPointerOverContainer: dropEvent.isPointerOverContainer,
|
|
item: this,
|
|
distance: dropEvent.distance,
|
|
dropPoint: dropEvent.dropPoint,
|
|
event: dropEvent.event,
|
|
});
|
|
});
|
|
}
|
|
/** Assigns the default input values based on a provided config object. */
|
|
_assignDefaults(config) {
|
|
const { lockAxis, dragStartDelay, constrainPosition, previewClass, boundaryElement, draggingDisabled, rootElementSelector, previewContainer, } = config;
|
|
this.disabled = draggingDisabled == null ? false : draggingDisabled;
|
|
this.dragStartDelay = dragStartDelay || 0;
|
|
if (lockAxis) {
|
|
this.lockAxis = lockAxis;
|
|
}
|
|
if (constrainPosition) {
|
|
this.constrainPosition = constrainPosition;
|
|
}
|
|
if (previewClass) {
|
|
this.previewClass = previewClass;
|
|
}
|
|
if (boundaryElement) {
|
|
this.boundaryElement = boundaryElement;
|
|
}
|
|
if (rootElementSelector) {
|
|
this.rootElementSelector = rootElementSelector;
|
|
}
|
|
if (previewContainer) {
|
|
this.previewContainer = previewContainer;
|
|
}
|
|
}
|
|
/** Sets up the listener that syncs the handles with the drag ref. */
|
|
_setupHandlesListener() {
|
|
// Listen for any newly-added handles.
|
|
this._handles.changes
|
|
.pipe(startWith(this._handles),
|
|
// Sync the new handles with the DragRef.
|
|
tap((handles) => {
|
|
const childHandleElements = handles
|
|
.filter(handle => handle._parentDrag === this)
|
|
.map(handle => handle.element);
|
|
// Usually handles are only allowed to be a descendant of the drag element, but if
|
|
// the consumer defined a different drag root, we should allow the drag element
|
|
// itself to be a handle too.
|
|
if (this._selfHandle && this.rootElementSelector) {
|
|
childHandleElements.push(this.element);
|
|
}
|
|
this._dragRef.withHandles(childHandleElements);
|
|
}),
|
|
// Listen if the state of any of the handles changes.
|
|
switchMap((handles) => {
|
|
return merge(...handles.map(item => {
|
|
return item._stateChanges.pipe(startWith(item));
|
|
}));
|
|
}), takeUntil(this._destroyed))
|
|
.subscribe(handleInstance => {
|
|
// Enabled/disable the handle that changed in the DragRef.
|
|
const dragRef = this._dragRef;
|
|
const handle = handleInstance.element.nativeElement;
|
|
handleInstance.disabled ? dragRef.disableHandle(handle) : dragRef.enableHandle(handle);
|
|
});
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDrag, deps: [{ token: i0.ElementRef }, { token: CDK_DROP_LIST, optional: true, skipSelf: true }, { token: DOCUMENT }, { token: i0.NgZone }, { token: i0.ViewContainerRef }, { token: CDK_DRAG_CONFIG, optional: true }, { token: i1$1.Directionality, optional: true }, { token: DragDrop }, { token: i0.ChangeDetectorRef }, { token: CDK_DRAG_HANDLE, optional: true, self: true }, { token: CDK_DRAG_PARENT, optional: true, skipSelf: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkDrag, isStandalone: true, selector: "[cdkDrag]", inputs: { data: ["cdkDragData", "data"], lockAxis: ["cdkDragLockAxis", "lockAxis"], rootElementSelector: ["cdkDragRootElement", "rootElementSelector"], boundaryElement: ["cdkDragBoundary", "boundaryElement"], dragStartDelay: ["cdkDragStartDelay", "dragStartDelay"], freeDragPosition: ["cdkDragFreeDragPosition", "freeDragPosition"], disabled: ["cdkDragDisabled", "disabled"], constrainPosition: ["cdkDragConstrainPosition", "constrainPosition"], previewClass: ["cdkDragPreviewClass", "previewClass"], previewContainer: ["cdkDragPreviewContainer", "previewContainer"] }, outputs: { started: "cdkDragStarted", released: "cdkDragReleased", ended: "cdkDragEnded", entered: "cdkDragEntered", exited: "cdkDragExited", dropped: "cdkDragDropped", moved: "cdkDragMoved" }, host: { properties: { "class.cdk-drag-disabled": "disabled", "class.cdk-drag-dragging": "_dragRef.isDragging()" }, classAttribute: "cdk-drag" }, providers: [{ provide: CDK_DRAG_PARENT, useExisting: CdkDrag }], queries: [{ propertyName: "_previewTemplate", first: true, predicate: CDK_DRAG_PREVIEW, descendants: true }, { propertyName: "_placeholderTemplate", first: true, predicate: CDK_DRAG_PLACEHOLDER, descendants: true }, { propertyName: "_handles", predicate: CDK_DRAG_HANDLE, descendants: true }], exportAs: ["cdkDrag"], usesOnChanges: true, ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDrag, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdkDrag]',
|
|
exportAs: 'cdkDrag',
|
|
standalone: true,
|
|
host: {
|
|
'class': DRAG_HOST_CLASS,
|
|
'[class.cdk-drag-disabled]': 'disabled',
|
|
'[class.cdk-drag-dragging]': '_dragRef.isDragging()',
|
|
},
|
|
providers: [{ provide: CDK_DRAG_PARENT, useExisting: CdkDrag }],
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: undefined, decorators: [{
|
|
type: Inject,
|
|
args: [CDK_DROP_LIST]
|
|
}, {
|
|
type: Optional
|
|
}, {
|
|
type: SkipSelf
|
|
}] }, { type: undefined, decorators: [{
|
|
type: Inject,
|
|
args: [DOCUMENT]
|
|
}] }, { type: i0.NgZone }, { type: i0.ViewContainerRef }, { type: undefined, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [CDK_DRAG_CONFIG]
|
|
}] }, { type: i1$1.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }, { type: DragDrop }, { type: i0.ChangeDetectorRef }, { type: CdkDragHandle, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Self
|
|
}, {
|
|
type: Inject,
|
|
args: [CDK_DRAG_HANDLE]
|
|
}] }, { type: CdkDrag, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: SkipSelf
|
|
}, {
|
|
type: Inject,
|
|
args: [CDK_DRAG_PARENT]
|
|
}] }]; }, propDecorators: { _handles: [{
|
|
type: ContentChildren,
|
|
args: [CDK_DRAG_HANDLE, { descendants: true }]
|
|
}], _previewTemplate: [{
|
|
type: ContentChild,
|
|
args: [CDK_DRAG_PREVIEW]
|
|
}], _placeholderTemplate: [{
|
|
type: ContentChild,
|
|
args: [CDK_DRAG_PLACEHOLDER]
|
|
}], data: [{
|
|
type: Input,
|
|
args: ['cdkDragData']
|
|
}], lockAxis: [{
|
|
type: Input,
|
|
args: ['cdkDragLockAxis']
|
|
}], rootElementSelector: [{
|
|
type: Input,
|
|
args: ['cdkDragRootElement']
|
|
}], boundaryElement: [{
|
|
type: Input,
|
|
args: ['cdkDragBoundary']
|
|
}], dragStartDelay: [{
|
|
type: Input,
|
|
args: ['cdkDragStartDelay']
|
|
}], freeDragPosition: [{
|
|
type: Input,
|
|
args: ['cdkDragFreeDragPosition']
|
|
}], disabled: [{
|
|
type: Input,
|
|
args: ['cdkDragDisabled']
|
|
}], constrainPosition: [{
|
|
type: Input,
|
|
args: ['cdkDragConstrainPosition']
|
|
}], previewClass: [{
|
|
type: Input,
|
|
args: ['cdkDragPreviewClass']
|
|
}], previewContainer: [{
|
|
type: Input,
|
|
args: ['cdkDragPreviewContainer']
|
|
}], started: [{
|
|
type: Output,
|
|
args: ['cdkDragStarted']
|
|
}], released: [{
|
|
type: Output,
|
|
args: ['cdkDragReleased']
|
|
}], ended: [{
|
|
type: Output,
|
|
args: ['cdkDragEnded']
|
|
}], entered: [{
|
|
type: Output,
|
|
args: ['cdkDragEntered']
|
|
}], exited: [{
|
|
type: Output,
|
|
args: ['cdkDragExited']
|
|
}], dropped: [{
|
|
type: Output,
|
|
args: ['cdkDragDropped']
|
|
}], moved: [{
|
|
type: Output,
|
|
args: ['cdkDragMoved']
|
|
}] } });
|
|
|
|
/**
|
|
* Injection token that can be used to reference instances of `CdkDropListGroup`. It serves as
|
|
* alternative token to the actual `CdkDropListGroup` class which could cause unnecessary
|
|
* retention of the class and its directive metadata.
|
|
*/
|
|
const CDK_DROP_LIST_GROUP = new InjectionToken('CdkDropListGroup');
|
|
/**
|
|
* Declaratively connects sibling `cdkDropList` instances together. All of the `cdkDropList`
|
|
* elements that are placed inside a `cdkDropListGroup` will be connected to each other
|
|
* automatically. Can be used as an alternative to the `cdkDropListConnectedTo` input
|
|
* from `cdkDropList`.
|
|
*/
|
|
class CdkDropListGroup {
|
|
constructor() {
|
|
/** Drop lists registered inside the group. */
|
|
this._items = new Set();
|
|
this._disabled = false;
|
|
}
|
|
/** Whether starting a dragging sequence from inside this group is disabled. */
|
|
get disabled() {
|
|
return this._disabled;
|
|
}
|
|
set disabled(value) {
|
|
this._disabled = coerceBooleanProperty(value);
|
|
}
|
|
ngOnDestroy() {
|
|
this._items.clear();
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDropListGroup, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkDropListGroup, isStandalone: true, selector: "[cdkDropListGroup]", inputs: { disabled: ["cdkDropListGroupDisabled", "disabled"] }, providers: [{ provide: CDK_DROP_LIST_GROUP, useExisting: CdkDropListGroup }], exportAs: ["cdkDropListGroup"], ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDropListGroup, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdkDropListGroup]',
|
|
exportAs: 'cdkDropListGroup',
|
|
standalone: true,
|
|
providers: [{ provide: CDK_DROP_LIST_GROUP, useExisting: CdkDropListGroup }],
|
|
}]
|
|
}], propDecorators: { disabled: [{
|
|
type: Input,
|
|
args: ['cdkDropListGroupDisabled']
|
|
}] } });
|
|
|
|
/** Counter used to generate unique ids for drop zones. */
|
|
let _uniqueIdCounter = 0;
|
|
/** Container that wraps a set of draggable items. */
|
|
class CdkDropList {
|
|
/** Keeps track of the drop lists that are currently on the page. */
|
|
static { this._dropLists = []; }
|
|
/** Whether starting a dragging sequence from this container is disabled. */
|
|
get disabled() {
|
|
return this._disabled || (!!this._group && this._group.disabled);
|
|
}
|
|
set disabled(value) {
|
|
// Usually we sync the directive and ref state right before dragging starts, in order to have
|
|
// a single point of failure and to avoid having to use setters for everything. `disabled` is
|
|
// a special case, because it can prevent the `beforeStarted` event from firing, which can lock
|
|
// the user in a disabled state, so we also need to sync it as it's being set.
|
|
this._dropListRef.disabled = this._disabled = coerceBooleanProperty(value);
|
|
}
|
|
constructor(
|
|
/** Element that the drop list is attached to. */
|
|
element, dragDrop, _changeDetectorRef, _scrollDispatcher, _dir, _group, config) {
|
|
this.element = element;
|
|
this._changeDetectorRef = _changeDetectorRef;
|
|
this._scrollDispatcher = _scrollDispatcher;
|
|
this._dir = _dir;
|
|
this._group = _group;
|
|
/** Emits when the list has been destroyed. */
|
|
this._destroyed = new Subject();
|
|
/**
|
|
* Other draggable containers that this container is connected to and into which the
|
|
* container's items can be transferred. Can either be references to other drop containers,
|
|
* or their unique IDs.
|
|
*/
|
|
this.connectedTo = [];
|
|
/**
|
|
* Unique ID for the drop zone. Can be used as a reference
|
|
* in the `connectedTo` of another `CdkDropList`.
|
|
*/
|
|
this.id = `cdk-drop-list-${_uniqueIdCounter++}`;
|
|
/**
|
|
* Function that is used to determine whether an item
|
|
* is allowed to be moved into a drop container.
|
|
*/
|
|
this.enterPredicate = () => true;
|
|
/** Functions that is used to determine whether an item can be sorted into a particular index. */
|
|
this.sortPredicate = () => true;
|
|
/** Emits when the user drops an item inside the container. */
|
|
this.dropped = new EventEmitter();
|
|
/**
|
|
* Emits when the user has moved a new drag item into this container.
|
|
*/
|
|
this.entered = new EventEmitter();
|
|
/**
|
|
* Emits when the user removes an item from the container
|
|
* by dragging it into another container.
|
|
*/
|
|
this.exited = new EventEmitter();
|
|
/** Emits as the user is swapping items while actively dragging. */
|
|
this.sorted = new EventEmitter();
|
|
/**
|
|
* Keeps track of the items that are registered with this container. Historically we used to
|
|
* do this with a `ContentChildren` query, however queries don't handle transplanted views very
|
|
* well which means that we can't handle cases like dragging the headers of a `mat-table`
|
|
* correctly. What we do instead is to have the items register themselves with the container
|
|
* and then we sort them based on their position in the DOM.
|
|
*/
|
|
this._unsortedItems = new Set();
|
|
if (typeof ngDevMode === 'undefined' || ngDevMode) {
|
|
assertElementNode(element.nativeElement, 'cdkDropList');
|
|
}
|
|
this._dropListRef = dragDrop.createDropList(element);
|
|
this._dropListRef.data = this;
|
|
if (config) {
|
|
this._assignDefaults(config);
|
|
}
|
|
this._dropListRef.enterPredicate = (drag, drop) => {
|
|
return this.enterPredicate(drag.data, drop.data);
|
|
};
|
|
this._dropListRef.sortPredicate = (index, drag, drop) => {
|
|
return this.sortPredicate(index, drag.data, drop.data);
|
|
};
|
|
this._setupInputSyncSubscription(this._dropListRef);
|
|
this._handleEvents(this._dropListRef);
|
|
CdkDropList._dropLists.push(this);
|
|
if (_group) {
|
|
_group._items.add(this);
|
|
}
|
|
}
|
|
/** Registers an items with the drop list. */
|
|
addItem(item) {
|
|
this._unsortedItems.add(item);
|
|
if (this._dropListRef.isDragging()) {
|
|
this._syncItemsWithRef();
|
|
}
|
|
}
|
|
/** Removes an item from the drop list. */
|
|
removeItem(item) {
|
|
this._unsortedItems.delete(item);
|
|
if (this._dropListRef.isDragging()) {
|
|
this._syncItemsWithRef();
|
|
}
|
|
}
|
|
/** Gets the registered items in the list, sorted by their position in the DOM. */
|
|
getSortedItems() {
|
|
return Array.from(this._unsortedItems).sort((a, b) => {
|
|
const documentPosition = a._dragRef
|
|
.getVisibleElement()
|
|
.compareDocumentPosition(b._dragRef.getVisibleElement());
|
|
// `compareDocumentPosition` returns a bitmask so we have to use a bitwise operator.
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/Node/compareDocumentPosition
|
|
// tslint:disable-next-line:no-bitwise
|
|
return documentPosition & Node.DOCUMENT_POSITION_FOLLOWING ? -1 : 1;
|
|
});
|
|
}
|
|
ngOnDestroy() {
|
|
const index = CdkDropList._dropLists.indexOf(this);
|
|
if (index > -1) {
|
|
CdkDropList._dropLists.splice(index, 1);
|
|
}
|
|
if (this._group) {
|
|
this._group._items.delete(this);
|
|
}
|
|
this._unsortedItems.clear();
|
|
this._dropListRef.dispose();
|
|
this._destroyed.next();
|
|
this._destroyed.complete();
|
|
}
|
|
/** Syncs the inputs of the CdkDropList with the options of the underlying DropListRef. */
|
|
_setupInputSyncSubscription(ref) {
|
|
if (this._dir) {
|
|
this._dir.change
|
|
.pipe(startWith(this._dir.value), takeUntil(this._destroyed))
|
|
.subscribe(value => ref.withDirection(value));
|
|
}
|
|
ref.beforeStarted.subscribe(() => {
|
|
const siblings = coerceArray(this.connectedTo).map(drop => {
|
|
if (typeof drop === 'string') {
|
|
const correspondingDropList = CdkDropList._dropLists.find(list => list.id === drop);
|
|
if (!correspondingDropList && (typeof ngDevMode === 'undefined' || ngDevMode)) {
|
|
console.warn(`CdkDropList could not find connected drop list with id "${drop}"`);
|
|
}
|
|
return correspondingDropList;
|
|
}
|
|
return drop;
|
|
});
|
|
if (this._group) {
|
|
this._group._items.forEach(drop => {
|
|
if (siblings.indexOf(drop) === -1) {
|
|
siblings.push(drop);
|
|
}
|
|
});
|
|
}
|
|
// Note that we resolve the scrollable parents here so that we delay the resolution
|
|
// as long as possible, ensuring that the element is in its final place in the DOM.
|
|
if (!this._scrollableParentsResolved) {
|
|
const scrollableParents = this._scrollDispatcher
|
|
.getAncestorScrollContainers(this.element)
|
|
.map(scrollable => scrollable.getElementRef().nativeElement);
|
|
this._dropListRef.withScrollableParents(scrollableParents);
|
|
// Only do this once since it involves traversing the DOM and the parents
|
|
// shouldn't be able to change without the drop list being destroyed.
|
|
this._scrollableParentsResolved = true;
|
|
}
|
|
ref.disabled = this.disabled;
|
|
ref.lockAxis = this.lockAxis;
|
|
ref.sortingDisabled = coerceBooleanProperty(this.sortingDisabled);
|
|
ref.autoScrollDisabled = coerceBooleanProperty(this.autoScrollDisabled);
|
|
ref.autoScrollStep = coerceNumberProperty(this.autoScrollStep, 2);
|
|
ref
|
|
.connectedTo(siblings.filter(drop => drop && drop !== this).map(list => list._dropListRef))
|
|
.withOrientation(this.orientation);
|
|
});
|
|
}
|
|
/** Handles events from the underlying DropListRef. */
|
|
_handleEvents(ref) {
|
|
ref.beforeStarted.subscribe(() => {
|
|
this._syncItemsWithRef();
|
|
this._changeDetectorRef.markForCheck();
|
|
});
|
|
ref.entered.subscribe(event => {
|
|
this.entered.emit({
|
|
container: this,
|
|
item: event.item.data,
|
|
currentIndex: event.currentIndex,
|
|
});
|
|
});
|
|
ref.exited.subscribe(event => {
|
|
this.exited.emit({
|
|
container: this,
|
|
item: event.item.data,
|
|
});
|
|
this._changeDetectorRef.markForCheck();
|
|
});
|
|
ref.sorted.subscribe(event => {
|
|
this.sorted.emit({
|
|
previousIndex: event.previousIndex,
|
|
currentIndex: event.currentIndex,
|
|
container: this,
|
|
item: event.item.data,
|
|
});
|
|
});
|
|
ref.dropped.subscribe(dropEvent => {
|
|
this.dropped.emit({
|
|
previousIndex: dropEvent.previousIndex,
|
|
currentIndex: dropEvent.currentIndex,
|
|
previousContainer: dropEvent.previousContainer.data,
|
|
container: dropEvent.container.data,
|
|
item: dropEvent.item.data,
|
|
isPointerOverContainer: dropEvent.isPointerOverContainer,
|
|
distance: dropEvent.distance,
|
|
dropPoint: dropEvent.dropPoint,
|
|
event: dropEvent.event,
|
|
});
|
|
// Mark for check since all of these events run outside of change
|
|
// detection and we're not guaranteed for something else to have triggered it.
|
|
this._changeDetectorRef.markForCheck();
|
|
});
|
|
merge(ref.receivingStarted, ref.receivingStopped).subscribe(() => this._changeDetectorRef.markForCheck());
|
|
}
|
|
/** Assigns the default input values based on a provided config object. */
|
|
_assignDefaults(config) {
|
|
const { lockAxis, draggingDisabled, sortingDisabled, listAutoScrollDisabled, listOrientation } = config;
|
|
this.disabled = draggingDisabled == null ? false : draggingDisabled;
|
|
this.sortingDisabled = sortingDisabled == null ? false : sortingDisabled;
|
|
this.autoScrollDisabled = listAutoScrollDisabled == null ? false : listAutoScrollDisabled;
|
|
this.orientation = listOrientation || 'vertical';
|
|
if (lockAxis) {
|
|
this.lockAxis = lockAxis;
|
|
}
|
|
}
|
|
/** Syncs up the registered drag items with underlying drop list ref. */
|
|
_syncItemsWithRef() {
|
|
this._dropListRef.withItems(this.getSortedItems().map(item => item._dragRef));
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDropList, deps: [{ token: i0.ElementRef }, { token: DragDrop }, { token: i0.ChangeDetectorRef }, { token: i1.ScrollDispatcher }, { token: i1$1.Directionality, optional: true }, { token: CDK_DROP_LIST_GROUP, optional: true, skipSelf: true }, { token: CDK_DRAG_CONFIG, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkDropList, isStandalone: true, selector: "[cdkDropList], cdk-drop-list", inputs: { connectedTo: ["cdkDropListConnectedTo", "connectedTo"], data: ["cdkDropListData", "data"], orientation: ["cdkDropListOrientation", "orientation"], id: "id", lockAxis: ["cdkDropListLockAxis", "lockAxis"], disabled: ["cdkDropListDisabled", "disabled"], sortingDisabled: ["cdkDropListSortingDisabled", "sortingDisabled"], enterPredicate: ["cdkDropListEnterPredicate", "enterPredicate"], sortPredicate: ["cdkDropListSortPredicate", "sortPredicate"], autoScrollDisabled: ["cdkDropListAutoScrollDisabled", "autoScrollDisabled"], autoScrollStep: ["cdkDropListAutoScrollStep", "autoScrollStep"] }, outputs: { dropped: "cdkDropListDropped", entered: "cdkDropListEntered", exited: "cdkDropListExited", sorted: "cdkDropListSorted" }, host: { properties: { "attr.id": "id", "class.cdk-drop-list-disabled": "disabled", "class.cdk-drop-list-dragging": "_dropListRef.isDragging()", "class.cdk-drop-list-receiving": "_dropListRef.isReceiving()" }, classAttribute: "cdk-drop-list" }, providers: [
|
|
// Prevent child drop lists from picking up the same group as their parent.
|
|
{ provide: CDK_DROP_LIST_GROUP, useValue: undefined },
|
|
{ provide: CDK_DROP_LIST, useExisting: CdkDropList },
|
|
], exportAs: ["cdkDropList"], ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkDropList, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdkDropList], cdk-drop-list',
|
|
exportAs: 'cdkDropList',
|
|
standalone: true,
|
|
providers: [
|
|
// Prevent child drop lists from picking up the same group as their parent.
|
|
{ provide: CDK_DROP_LIST_GROUP, useValue: undefined },
|
|
{ provide: CDK_DROP_LIST, useExisting: CdkDropList },
|
|
],
|
|
host: {
|
|
'class': 'cdk-drop-list',
|
|
'[attr.id]': 'id',
|
|
'[class.cdk-drop-list-disabled]': 'disabled',
|
|
'[class.cdk-drop-list-dragging]': '_dropListRef.isDragging()',
|
|
'[class.cdk-drop-list-receiving]': '_dropListRef.isReceiving()',
|
|
},
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: DragDrop }, { type: i0.ChangeDetectorRef }, { type: i1.ScrollDispatcher }, { type: i1$1.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }, { type: CdkDropListGroup, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [CDK_DROP_LIST_GROUP]
|
|
}, {
|
|
type: SkipSelf
|
|
}] }, { type: undefined, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [CDK_DRAG_CONFIG]
|
|
}] }]; }, propDecorators: { connectedTo: [{
|
|
type: Input,
|
|
args: ['cdkDropListConnectedTo']
|
|
}], data: [{
|
|
type: Input,
|
|
args: ['cdkDropListData']
|
|
}], orientation: [{
|
|
type: Input,
|
|
args: ['cdkDropListOrientation']
|
|
}], id: [{
|
|
type: Input
|
|
}], lockAxis: [{
|
|
type: Input,
|
|
args: ['cdkDropListLockAxis']
|
|
}], disabled: [{
|
|
type: Input,
|
|
args: ['cdkDropListDisabled']
|
|
}], sortingDisabled: [{
|
|
type: Input,
|
|
args: ['cdkDropListSortingDisabled']
|
|
}], enterPredicate: [{
|
|
type: Input,
|
|
args: ['cdkDropListEnterPredicate']
|
|
}], sortPredicate: [{
|
|
type: Input,
|
|
args: ['cdkDropListSortPredicate']
|
|
}], autoScrollDisabled: [{
|
|
type: Input,
|
|
args: ['cdkDropListAutoScrollDisabled']
|
|
}], autoScrollStep: [{
|
|
type: Input,
|
|
args: ['cdkDropListAutoScrollStep']
|
|
}], dropped: [{
|
|
type: Output,
|
|
args: ['cdkDropListDropped']
|
|
}], entered: [{
|
|
type: Output,
|
|
args: ['cdkDropListEntered']
|
|
}], exited: [{
|
|
type: Output,
|
|
args: ['cdkDropListExited']
|
|
}], sorted: [{
|
|
type: Output,
|
|
args: ['cdkDropListSorted']
|
|
}] } });
|
|
|
|
const DRAG_DROP_DIRECTIVES = [
|
|
CdkDropList,
|
|
CdkDropListGroup,
|
|
CdkDrag,
|
|
CdkDragHandle,
|
|
CdkDragPreview,
|
|
CdkDragPlaceholder,
|
|
];
|
|
class DragDropModule {
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static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDropModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
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static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.1.1", ngImport: i0, type: DragDropModule, imports: [CdkDropList,
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CdkDropListGroup,
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CdkDrag,
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CdkDragHandle,
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CdkDragPreview,
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CdkDragPlaceholder], exports: [CdkScrollableModule, CdkDropList,
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CdkDropListGroup,
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CdkDrag,
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CdkDragHandle,
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CdkDragPreview,
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CdkDragPlaceholder] }); }
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static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDropModule, providers: [DragDrop], imports: [CdkScrollableModule] }); }
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}
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i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: DragDropModule, decorators: [{
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type: NgModule,
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args: [{
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imports: DRAG_DROP_DIRECTIVES,
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exports: [CdkScrollableModule, ...DRAG_DROP_DIRECTIVES],
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providers: [DragDrop],
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}]
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}] });
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/**
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* Generated bundle index. Do not edit.
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*/
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export { CDK_DRAG_CONFIG, CDK_DRAG_HANDLE, CDK_DRAG_PARENT, CDK_DRAG_PLACEHOLDER, CDK_DRAG_PREVIEW, CDK_DROP_LIST, CDK_DROP_LIST_GROUP, CdkDrag, CdkDragHandle, CdkDragPlaceholder, CdkDragPreview, CdkDropList, CdkDropListGroup, DragDrop, DragDropModule, DragDropRegistry, DragRef, DropListRef, copyArrayItem, moveItemInArray, transferArrayItem };
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//# sourceMappingURL=drag-drop.mjs.map
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