1502 lines
77 KiB
JavaScript
1502 lines
77 KiB
JavaScript
import { coerceNumberProperty, coerceElement, coerceBooleanProperty } from '@angular/cdk/coercion';
|
|
import * as i0 from '@angular/core';
|
|
import { InjectionToken, forwardRef, Directive, Input, Injectable, Optional, Inject, inject, Component, ViewEncapsulation, ChangeDetectionStrategy, Output, ViewChild, SkipSelf, ElementRef, NgModule } from '@angular/core';
|
|
import { Subject, of, Observable, fromEvent, animationFrameScheduler, asapScheduler, Subscription, isObservable } from 'rxjs';
|
|
import { distinctUntilChanged, auditTime, filter, takeUntil, startWith, pairwise, switchMap, shareReplay } from 'rxjs/operators';
|
|
import * as i1 from '@angular/cdk/platform';
|
|
import { getRtlScrollAxisType, supportsScrollBehavior, Platform } from '@angular/cdk/platform';
|
|
import { DOCUMENT } from '@angular/common';
|
|
import * as i2 from '@angular/cdk/bidi';
|
|
import { BidiModule } from '@angular/cdk/bidi';
|
|
import * as i2$1 from '@angular/cdk/collections';
|
|
import { isDataSource, ArrayDataSource, _VIEW_REPEATER_STRATEGY, _RecycleViewRepeaterStrategy } from '@angular/cdk/collections';
|
|
|
|
/** The injection token used to specify the virtual scrolling strategy. */
|
|
const VIRTUAL_SCROLL_STRATEGY = new InjectionToken('VIRTUAL_SCROLL_STRATEGY');
|
|
|
|
/** Virtual scrolling strategy for lists with items of known fixed size. */
|
|
class FixedSizeVirtualScrollStrategy {
|
|
/**
|
|
* @param itemSize The size of the items in the virtually scrolling list.
|
|
* @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more
|
|
* @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.
|
|
*/
|
|
constructor(itemSize, minBufferPx, maxBufferPx) {
|
|
this._scrolledIndexChange = new Subject();
|
|
/** @docs-private Implemented as part of VirtualScrollStrategy. */
|
|
this.scrolledIndexChange = this._scrolledIndexChange.pipe(distinctUntilChanged());
|
|
/** The attached viewport. */
|
|
this._viewport = null;
|
|
this._itemSize = itemSize;
|
|
this._minBufferPx = minBufferPx;
|
|
this._maxBufferPx = maxBufferPx;
|
|
}
|
|
/**
|
|
* Attaches this scroll strategy to a viewport.
|
|
* @param viewport The viewport to attach this strategy to.
|
|
*/
|
|
attach(viewport) {
|
|
this._viewport = viewport;
|
|
this._updateTotalContentSize();
|
|
this._updateRenderedRange();
|
|
}
|
|
/** Detaches this scroll strategy from the currently attached viewport. */
|
|
detach() {
|
|
this._scrolledIndexChange.complete();
|
|
this._viewport = null;
|
|
}
|
|
/**
|
|
* Update the item size and buffer size.
|
|
* @param itemSize The size of the items in the virtually scrolling list.
|
|
* @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more
|
|
* @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.
|
|
*/
|
|
updateItemAndBufferSize(itemSize, minBufferPx, maxBufferPx) {
|
|
if (maxBufferPx < minBufferPx && (typeof ngDevMode === 'undefined' || ngDevMode)) {
|
|
throw Error('CDK virtual scroll: maxBufferPx must be greater than or equal to minBufferPx');
|
|
}
|
|
this._itemSize = itemSize;
|
|
this._minBufferPx = minBufferPx;
|
|
this._maxBufferPx = maxBufferPx;
|
|
this._updateTotalContentSize();
|
|
this._updateRenderedRange();
|
|
}
|
|
/** @docs-private Implemented as part of VirtualScrollStrategy. */
|
|
onContentScrolled() {
|
|
this._updateRenderedRange();
|
|
}
|
|
/** @docs-private Implemented as part of VirtualScrollStrategy. */
|
|
onDataLengthChanged() {
|
|
this._updateTotalContentSize();
|
|
this._updateRenderedRange();
|
|
}
|
|
/** @docs-private Implemented as part of VirtualScrollStrategy. */
|
|
onContentRendered() {
|
|
/* no-op */
|
|
}
|
|
/** @docs-private Implemented as part of VirtualScrollStrategy. */
|
|
onRenderedOffsetChanged() {
|
|
/* no-op */
|
|
}
|
|
/**
|
|
* Scroll to the offset for the given index.
|
|
* @param index The index of the element to scroll to.
|
|
* @param behavior The ScrollBehavior to use when scrolling.
|
|
*/
|
|
scrollToIndex(index, behavior) {
|
|
if (this._viewport) {
|
|
this._viewport.scrollToOffset(index * this._itemSize, behavior);
|
|
}
|
|
}
|
|
/** Update the viewport's total content size. */
|
|
_updateTotalContentSize() {
|
|
if (!this._viewport) {
|
|
return;
|
|
}
|
|
this._viewport.setTotalContentSize(this._viewport.getDataLength() * this._itemSize);
|
|
}
|
|
/** Update the viewport's rendered range. */
|
|
_updateRenderedRange() {
|
|
if (!this._viewport) {
|
|
return;
|
|
}
|
|
const renderedRange = this._viewport.getRenderedRange();
|
|
const newRange = { start: renderedRange.start, end: renderedRange.end };
|
|
const viewportSize = this._viewport.getViewportSize();
|
|
const dataLength = this._viewport.getDataLength();
|
|
let scrollOffset = this._viewport.measureScrollOffset();
|
|
// Prevent NaN as result when dividing by zero.
|
|
let firstVisibleIndex = this._itemSize > 0 ? scrollOffset / this._itemSize : 0;
|
|
// If user scrolls to the bottom of the list and data changes to a smaller list
|
|
if (newRange.end > dataLength) {
|
|
// We have to recalculate the first visible index based on new data length and viewport size.
|
|
const maxVisibleItems = Math.ceil(viewportSize / this._itemSize);
|
|
const newVisibleIndex = Math.max(0, Math.min(firstVisibleIndex, dataLength - maxVisibleItems));
|
|
// If first visible index changed we must update scroll offset to handle start/end buffers
|
|
// Current range must also be adjusted to cover the new position (bottom of new list).
|
|
if (firstVisibleIndex != newVisibleIndex) {
|
|
firstVisibleIndex = newVisibleIndex;
|
|
scrollOffset = newVisibleIndex * this._itemSize;
|
|
newRange.start = Math.floor(firstVisibleIndex);
|
|
}
|
|
newRange.end = Math.max(0, Math.min(dataLength, newRange.start + maxVisibleItems));
|
|
}
|
|
const startBuffer = scrollOffset - newRange.start * this._itemSize;
|
|
if (startBuffer < this._minBufferPx && newRange.start != 0) {
|
|
const expandStart = Math.ceil((this._maxBufferPx - startBuffer) / this._itemSize);
|
|
newRange.start = Math.max(0, newRange.start - expandStart);
|
|
newRange.end = Math.min(dataLength, Math.ceil(firstVisibleIndex + (viewportSize + this._minBufferPx) / this._itemSize));
|
|
}
|
|
else {
|
|
const endBuffer = newRange.end * this._itemSize - (scrollOffset + viewportSize);
|
|
if (endBuffer < this._minBufferPx && newRange.end != dataLength) {
|
|
const expandEnd = Math.ceil((this._maxBufferPx - endBuffer) / this._itemSize);
|
|
if (expandEnd > 0) {
|
|
newRange.end = Math.min(dataLength, newRange.end + expandEnd);
|
|
newRange.start = Math.max(0, Math.floor(firstVisibleIndex - this._minBufferPx / this._itemSize));
|
|
}
|
|
}
|
|
}
|
|
this._viewport.setRenderedRange(newRange);
|
|
this._viewport.setRenderedContentOffset(this._itemSize * newRange.start);
|
|
this._scrolledIndexChange.next(Math.floor(firstVisibleIndex));
|
|
}
|
|
}
|
|
/**
|
|
* Provider factory for `FixedSizeVirtualScrollStrategy` that simply extracts the already created
|
|
* `FixedSizeVirtualScrollStrategy` from the given directive.
|
|
* @param fixedSizeDir The instance of `CdkFixedSizeVirtualScroll` to extract the
|
|
* `FixedSizeVirtualScrollStrategy` from.
|
|
*/
|
|
function _fixedSizeVirtualScrollStrategyFactory(fixedSizeDir) {
|
|
return fixedSizeDir._scrollStrategy;
|
|
}
|
|
/** A virtual scroll strategy that supports fixed-size items. */
|
|
class CdkFixedSizeVirtualScroll {
|
|
constructor() {
|
|
this._itemSize = 20;
|
|
this._minBufferPx = 100;
|
|
this._maxBufferPx = 200;
|
|
/** The scroll strategy used by this directive. */
|
|
this._scrollStrategy = new FixedSizeVirtualScrollStrategy(this.itemSize, this.minBufferPx, this.maxBufferPx);
|
|
}
|
|
/** The size of the items in the list (in pixels). */
|
|
get itemSize() {
|
|
return this._itemSize;
|
|
}
|
|
set itemSize(value) {
|
|
this._itemSize = coerceNumberProperty(value);
|
|
}
|
|
/**
|
|
* The minimum amount of buffer rendered beyond the viewport (in pixels).
|
|
* If the amount of buffer dips below this number, more items will be rendered. Defaults to 100px.
|
|
*/
|
|
get minBufferPx() {
|
|
return this._minBufferPx;
|
|
}
|
|
set minBufferPx(value) {
|
|
this._minBufferPx = coerceNumberProperty(value);
|
|
}
|
|
/**
|
|
* The number of pixels worth of buffer to render for when rendering new items. Defaults to 200px.
|
|
*/
|
|
get maxBufferPx() {
|
|
return this._maxBufferPx;
|
|
}
|
|
set maxBufferPx(value) {
|
|
this._maxBufferPx = coerceNumberProperty(value);
|
|
}
|
|
ngOnChanges() {
|
|
this._scrollStrategy.updateItemAndBufferSize(this.itemSize, this.minBufferPx, this.maxBufferPx);
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkFixedSizeVirtualScroll, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkFixedSizeVirtualScroll, isStandalone: true, selector: "cdk-virtual-scroll-viewport[itemSize]", inputs: { itemSize: "itemSize", minBufferPx: "minBufferPx", maxBufferPx: "maxBufferPx" }, providers: [
|
|
{
|
|
provide: VIRTUAL_SCROLL_STRATEGY,
|
|
useFactory: _fixedSizeVirtualScrollStrategyFactory,
|
|
deps: [forwardRef(() => CdkFixedSizeVirtualScroll)],
|
|
},
|
|
], usesOnChanges: true, ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkFixedSizeVirtualScroll, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: 'cdk-virtual-scroll-viewport[itemSize]',
|
|
standalone: true,
|
|
providers: [
|
|
{
|
|
provide: VIRTUAL_SCROLL_STRATEGY,
|
|
useFactory: _fixedSizeVirtualScrollStrategyFactory,
|
|
deps: [forwardRef(() => CdkFixedSizeVirtualScroll)],
|
|
},
|
|
],
|
|
}]
|
|
}], propDecorators: { itemSize: [{
|
|
type: Input
|
|
}], minBufferPx: [{
|
|
type: Input
|
|
}], maxBufferPx: [{
|
|
type: Input
|
|
}] } });
|
|
|
|
/** Time in ms to throttle the scrolling events by default. */
|
|
const DEFAULT_SCROLL_TIME = 20;
|
|
/**
|
|
* Service contained all registered Scrollable references and emits an event when any one of the
|
|
* Scrollable references emit a scrolled event.
|
|
*/
|
|
class ScrollDispatcher {
|
|
constructor(_ngZone, _platform, document) {
|
|
this._ngZone = _ngZone;
|
|
this._platform = _platform;
|
|
/** Subject for notifying that a registered scrollable reference element has been scrolled. */
|
|
this._scrolled = new Subject();
|
|
/** Keeps track of the global `scroll` and `resize` subscriptions. */
|
|
this._globalSubscription = null;
|
|
/** Keeps track of the amount of subscriptions to `scrolled`. Used for cleaning up afterwards. */
|
|
this._scrolledCount = 0;
|
|
/**
|
|
* Map of all the scrollable references that are registered with the service and their
|
|
* scroll event subscriptions.
|
|
*/
|
|
this.scrollContainers = new Map();
|
|
this._document = document;
|
|
}
|
|
/**
|
|
* Registers a scrollable instance with the service and listens for its scrolled events. When the
|
|
* scrollable is scrolled, the service emits the event to its scrolled observable.
|
|
* @param scrollable Scrollable instance to be registered.
|
|
*/
|
|
register(scrollable) {
|
|
if (!this.scrollContainers.has(scrollable)) {
|
|
this.scrollContainers.set(scrollable, scrollable.elementScrolled().subscribe(() => this._scrolled.next(scrollable)));
|
|
}
|
|
}
|
|
/**
|
|
* De-registers a Scrollable reference and unsubscribes from its scroll event observable.
|
|
* @param scrollable Scrollable instance to be deregistered.
|
|
*/
|
|
deregister(scrollable) {
|
|
const scrollableReference = this.scrollContainers.get(scrollable);
|
|
if (scrollableReference) {
|
|
scrollableReference.unsubscribe();
|
|
this.scrollContainers.delete(scrollable);
|
|
}
|
|
}
|
|
/**
|
|
* Returns an observable that emits an event whenever any of the registered Scrollable
|
|
* references (or window, document, or body) fire a scrolled event. Can provide a time in ms
|
|
* to override the default "throttle" time.
|
|
*
|
|
* **Note:** in order to avoid hitting change detection for every scroll event,
|
|
* all of the events emitted from this stream will be run outside the Angular zone.
|
|
* If you need to update any data bindings as a result of a scroll event, you have
|
|
* to run the callback using `NgZone.run`.
|
|
*/
|
|
scrolled(auditTimeInMs = DEFAULT_SCROLL_TIME) {
|
|
if (!this._platform.isBrowser) {
|
|
return of();
|
|
}
|
|
return new Observable((observer) => {
|
|
if (!this._globalSubscription) {
|
|
this._addGlobalListener();
|
|
}
|
|
// In the case of a 0ms delay, use an observable without auditTime
|
|
// since it does add a perceptible delay in processing overhead.
|
|
const subscription = auditTimeInMs > 0
|
|
? this._scrolled.pipe(auditTime(auditTimeInMs)).subscribe(observer)
|
|
: this._scrolled.subscribe(observer);
|
|
this._scrolledCount++;
|
|
return () => {
|
|
subscription.unsubscribe();
|
|
this._scrolledCount--;
|
|
if (!this._scrolledCount) {
|
|
this._removeGlobalListener();
|
|
}
|
|
};
|
|
});
|
|
}
|
|
ngOnDestroy() {
|
|
this._removeGlobalListener();
|
|
this.scrollContainers.forEach((_, container) => this.deregister(container));
|
|
this._scrolled.complete();
|
|
}
|
|
/**
|
|
* Returns an observable that emits whenever any of the
|
|
* scrollable ancestors of an element are scrolled.
|
|
* @param elementOrElementRef Element whose ancestors to listen for.
|
|
* @param auditTimeInMs Time to throttle the scroll events.
|
|
*/
|
|
ancestorScrolled(elementOrElementRef, auditTimeInMs) {
|
|
const ancestors = this.getAncestorScrollContainers(elementOrElementRef);
|
|
return this.scrolled(auditTimeInMs).pipe(filter(target => {
|
|
return !target || ancestors.indexOf(target) > -1;
|
|
}));
|
|
}
|
|
/** Returns all registered Scrollables that contain the provided element. */
|
|
getAncestorScrollContainers(elementOrElementRef) {
|
|
const scrollingContainers = [];
|
|
this.scrollContainers.forEach((_subscription, scrollable) => {
|
|
if (this._scrollableContainsElement(scrollable, elementOrElementRef)) {
|
|
scrollingContainers.push(scrollable);
|
|
}
|
|
});
|
|
return scrollingContainers;
|
|
}
|
|
/** Use defaultView of injected document if available or fallback to global window reference */
|
|
_getWindow() {
|
|
return this._document.defaultView || window;
|
|
}
|
|
/** Returns true if the element is contained within the provided Scrollable. */
|
|
_scrollableContainsElement(scrollable, elementOrElementRef) {
|
|
let element = coerceElement(elementOrElementRef);
|
|
let scrollableElement = scrollable.getElementRef().nativeElement;
|
|
// Traverse through the element parents until we reach null, checking if any of the elements
|
|
// are the scrollable's element.
|
|
do {
|
|
if (element == scrollableElement) {
|
|
return true;
|
|
}
|
|
} while ((element = element.parentElement));
|
|
return false;
|
|
}
|
|
/** Sets up the global scroll listeners. */
|
|
_addGlobalListener() {
|
|
this._globalSubscription = this._ngZone.runOutsideAngular(() => {
|
|
const window = this._getWindow();
|
|
return fromEvent(window.document, 'scroll').subscribe(() => this._scrolled.next());
|
|
});
|
|
}
|
|
/** Cleans up the global scroll listener. */
|
|
_removeGlobalListener() {
|
|
if (this._globalSubscription) {
|
|
this._globalSubscription.unsubscribe();
|
|
this._globalSubscription = null;
|
|
}
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ScrollDispatcher, deps: [{ token: i0.NgZone }, { token: i1.Platform }, { token: DOCUMENT, optional: true }], target: i0.ɵɵFactoryTarget.Injectable }); }
|
|
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ScrollDispatcher, providedIn: 'root' }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ScrollDispatcher, decorators: [{
|
|
type: Injectable,
|
|
args: [{ providedIn: 'root' }]
|
|
}], ctorParameters: function () { return [{ type: i0.NgZone }, { type: i1.Platform }, { type: undefined, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [DOCUMENT]
|
|
}] }]; } });
|
|
|
|
/**
|
|
* Sends an event when the directive's element is scrolled. Registers itself with the
|
|
* ScrollDispatcher service to include itself as part of its collection of scrolling events that it
|
|
* can be listened to through the service.
|
|
*/
|
|
class CdkScrollable {
|
|
constructor(elementRef, scrollDispatcher, ngZone, dir) {
|
|
this.elementRef = elementRef;
|
|
this.scrollDispatcher = scrollDispatcher;
|
|
this.ngZone = ngZone;
|
|
this.dir = dir;
|
|
this._destroyed = new Subject();
|
|
this._elementScrolled = new Observable((observer) => this.ngZone.runOutsideAngular(() => fromEvent(this.elementRef.nativeElement, 'scroll')
|
|
.pipe(takeUntil(this._destroyed))
|
|
.subscribe(observer)));
|
|
}
|
|
ngOnInit() {
|
|
this.scrollDispatcher.register(this);
|
|
}
|
|
ngOnDestroy() {
|
|
this.scrollDispatcher.deregister(this);
|
|
this._destroyed.next();
|
|
this._destroyed.complete();
|
|
}
|
|
/** Returns observable that emits when a scroll event is fired on the host element. */
|
|
elementScrolled() {
|
|
return this._elementScrolled;
|
|
}
|
|
/** Gets the ElementRef for the viewport. */
|
|
getElementRef() {
|
|
return this.elementRef;
|
|
}
|
|
/**
|
|
* Scrolls to the specified offsets. This is a normalized version of the browser's native scrollTo
|
|
* method, since browsers are not consistent about what scrollLeft means in RTL. For this method
|
|
* left and right always refer to the left and right side of the scrolling container irrespective
|
|
* of the layout direction. start and end refer to left and right in an LTR context and vice-versa
|
|
* in an RTL context.
|
|
* @param options specified the offsets to scroll to.
|
|
*/
|
|
scrollTo(options) {
|
|
const el = this.elementRef.nativeElement;
|
|
const isRtl = this.dir && this.dir.value == 'rtl';
|
|
// Rewrite start & end offsets as right or left offsets.
|
|
if (options.left == null) {
|
|
options.left = isRtl ? options.end : options.start;
|
|
}
|
|
if (options.right == null) {
|
|
options.right = isRtl ? options.start : options.end;
|
|
}
|
|
// Rewrite the bottom offset as a top offset.
|
|
if (options.bottom != null) {
|
|
options.top =
|
|
el.scrollHeight - el.clientHeight - options.bottom;
|
|
}
|
|
// Rewrite the right offset as a left offset.
|
|
if (isRtl && getRtlScrollAxisType() != 0 /* RtlScrollAxisType.NORMAL */) {
|
|
if (options.left != null) {
|
|
options.right =
|
|
el.scrollWidth - el.clientWidth - options.left;
|
|
}
|
|
if (getRtlScrollAxisType() == 2 /* RtlScrollAxisType.INVERTED */) {
|
|
options.left = options.right;
|
|
}
|
|
else if (getRtlScrollAxisType() == 1 /* RtlScrollAxisType.NEGATED */) {
|
|
options.left = options.right ? -options.right : options.right;
|
|
}
|
|
}
|
|
else {
|
|
if (options.right != null) {
|
|
options.left =
|
|
el.scrollWidth - el.clientWidth - options.right;
|
|
}
|
|
}
|
|
this._applyScrollToOptions(options);
|
|
}
|
|
_applyScrollToOptions(options) {
|
|
const el = this.elementRef.nativeElement;
|
|
if (supportsScrollBehavior()) {
|
|
el.scrollTo(options);
|
|
}
|
|
else {
|
|
if (options.top != null) {
|
|
el.scrollTop = options.top;
|
|
}
|
|
if (options.left != null) {
|
|
el.scrollLeft = options.left;
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* Measures the scroll offset relative to the specified edge of the viewport. This method can be
|
|
* used instead of directly checking scrollLeft or scrollTop, since browsers are not consistent
|
|
* about what scrollLeft means in RTL. The values returned by this method are normalized such that
|
|
* left and right always refer to the left and right side of the scrolling container irrespective
|
|
* of the layout direction. start and end refer to left and right in an LTR context and vice-versa
|
|
* in an RTL context.
|
|
* @param from The edge to measure from.
|
|
*/
|
|
measureScrollOffset(from) {
|
|
const LEFT = 'left';
|
|
const RIGHT = 'right';
|
|
const el = this.elementRef.nativeElement;
|
|
if (from == 'top') {
|
|
return el.scrollTop;
|
|
}
|
|
if (from == 'bottom') {
|
|
return el.scrollHeight - el.clientHeight - el.scrollTop;
|
|
}
|
|
// Rewrite start & end as left or right offsets.
|
|
const isRtl = this.dir && this.dir.value == 'rtl';
|
|
if (from == 'start') {
|
|
from = isRtl ? RIGHT : LEFT;
|
|
}
|
|
else if (from == 'end') {
|
|
from = isRtl ? LEFT : RIGHT;
|
|
}
|
|
if (isRtl && getRtlScrollAxisType() == 2 /* RtlScrollAxisType.INVERTED */) {
|
|
// For INVERTED, scrollLeft is (scrollWidth - clientWidth) when scrolled all the way left and
|
|
// 0 when scrolled all the way right.
|
|
if (from == LEFT) {
|
|
return el.scrollWidth - el.clientWidth - el.scrollLeft;
|
|
}
|
|
else {
|
|
return el.scrollLeft;
|
|
}
|
|
}
|
|
else if (isRtl && getRtlScrollAxisType() == 1 /* RtlScrollAxisType.NEGATED */) {
|
|
// For NEGATED, scrollLeft is -(scrollWidth - clientWidth) when scrolled all the way left and
|
|
// 0 when scrolled all the way right.
|
|
if (from == LEFT) {
|
|
return el.scrollLeft + el.scrollWidth - el.clientWidth;
|
|
}
|
|
else {
|
|
return -el.scrollLeft;
|
|
}
|
|
}
|
|
else {
|
|
// For NORMAL, as well as non-RTL contexts, scrollLeft is 0 when scrolled all the way left and
|
|
// (scrollWidth - clientWidth) when scrolled all the way right.
|
|
if (from == LEFT) {
|
|
return el.scrollLeft;
|
|
}
|
|
else {
|
|
return el.scrollWidth - el.clientWidth - el.scrollLeft;
|
|
}
|
|
}
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkScrollable, deps: [{ token: i0.ElementRef }, { token: ScrollDispatcher }, { token: i0.NgZone }, { token: i2.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkScrollable, isStandalone: true, selector: "[cdk-scrollable], [cdkScrollable]", ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkScrollable, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdk-scrollable], [cdkScrollable]',
|
|
standalone: true,
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: ScrollDispatcher }, { type: i0.NgZone }, { type: i2.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }]; } });
|
|
|
|
/** Time in ms to throttle the resize events by default. */
|
|
const DEFAULT_RESIZE_TIME = 20;
|
|
/**
|
|
* Simple utility for getting the bounds of the browser viewport.
|
|
* @docs-private
|
|
*/
|
|
class ViewportRuler {
|
|
constructor(_platform, ngZone, document) {
|
|
this._platform = _platform;
|
|
/** Stream of viewport change events. */
|
|
this._change = new Subject();
|
|
/** Event listener that will be used to handle the viewport change events. */
|
|
this._changeListener = (event) => {
|
|
this._change.next(event);
|
|
};
|
|
this._document = document;
|
|
ngZone.runOutsideAngular(() => {
|
|
if (_platform.isBrowser) {
|
|
const window = this._getWindow();
|
|
// Note that bind the events ourselves, rather than going through something like RxJS's
|
|
// `fromEvent` so that we can ensure that they're bound outside of the NgZone.
|
|
window.addEventListener('resize', this._changeListener);
|
|
window.addEventListener('orientationchange', this._changeListener);
|
|
}
|
|
// Clear the cached position so that the viewport is re-measured next time it is required.
|
|
// We don't need to keep track of the subscription, because it is completed on destroy.
|
|
this.change().subscribe(() => (this._viewportSize = null));
|
|
});
|
|
}
|
|
ngOnDestroy() {
|
|
if (this._platform.isBrowser) {
|
|
const window = this._getWindow();
|
|
window.removeEventListener('resize', this._changeListener);
|
|
window.removeEventListener('orientationchange', this._changeListener);
|
|
}
|
|
this._change.complete();
|
|
}
|
|
/** Returns the viewport's width and height. */
|
|
getViewportSize() {
|
|
if (!this._viewportSize) {
|
|
this._updateViewportSize();
|
|
}
|
|
const output = { width: this._viewportSize.width, height: this._viewportSize.height };
|
|
// If we're not on a browser, don't cache the size since it'll be mocked out anyway.
|
|
if (!this._platform.isBrowser) {
|
|
this._viewportSize = null;
|
|
}
|
|
return output;
|
|
}
|
|
/** Gets a ClientRect for the viewport's bounds. */
|
|
getViewportRect() {
|
|
// Use the document element's bounding rect rather than the window scroll properties
|
|
// (e.g. pageYOffset, scrollY) due to in issue in Chrome and IE where window scroll
|
|
// properties and client coordinates (boundingClientRect, clientX/Y, etc.) are in different
|
|
// conceptual viewports. Under most circumstances these viewports are equivalent, but they
|
|
// can disagree when the page is pinch-zoomed (on devices that support touch).
|
|
// See https://bugs.chromium.org/p/chromium/issues/detail?id=489206#c4
|
|
// We use the documentElement instead of the body because, by default (without a css reset)
|
|
// browsers typically give the document body an 8px margin, which is not included in
|
|
// getBoundingClientRect().
|
|
const scrollPosition = this.getViewportScrollPosition();
|
|
const { width, height } = this.getViewportSize();
|
|
return {
|
|
top: scrollPosition.top,
|
|
left: scrollPosition.left,
|
|
bottom: scrollPosition.top + height,
|
|
right: scrollPosition.left + width,
|
|
height,
|
|
width,
|
|
};
|
|
}
|
|
/** Gets the (top, left) scroll position of the viewport. */
|
|
getViewportScrollPosition() {
|
|
// While we can get a reference to the fake document
|
|
// during SSR, it doesn't have getBoundingClientRect.
|
|
if (!this._platform.isBrowser) {
|
|
return { top: 0, left: 0 };
|
|
}
|
|
// The top-left-corner of the viewport is determined by the scroll position of the document
|
|
// body, normally just (scrollLeft, scrollTop). However, Chrome and Firefox disagree about
|
|
// whether `document.body` or `document.documentElement` is the scrolled element, so reading
|
|
// `scrollTop` and `scrollLeft` is inconsistent. However, using the bounding rect of
|
|
// `document.documentElement` works consistently, where the `top` and `left` values will
|
|
// equal negative the scroll position.
|
|
const document = this._document;
|
|
const window = this._getWindow();
|
|
const documentElement = document.documentElement;
|
|
const documentRect = documentElement.getBoundingClientRect();
|
|
const top = -documentRect.top ||
|
|
document.body.scrollTop ||
|
|
window.scrollY ||
|
|
documentElement.scrollTop ||
|
|
0;
|
|
const left = -documentRect.left ||
|
|
document.body.scrollLeft ||
|
|
window.scrollX ||
|
|
documentElement.scrollLeft ||
|
|
0;
|
|
return { top, left };
|
|
}
|
|
/**
|
|
* Returns a stream that emits whenever the size of the viewport changes.
|
|
* This stream emits outside of the Angular zone.
|
|
* @param throttleTime Time in milliseconds to throttle the stream.
|
|
*/
|
|
change(throttleTime = DEFAULT_RESIZE_TIME) {
|
|
return throttleTime > 0 ? this._change.pipe(auditTime(throttleTime)) : this._change;
|
|
}
|
|
/** Use defaultView of injected document if available or fallback to global window reference */
|
|
_getWindow() {
|
|
return this._document.defaultView || window;
|
|
}
|
|
/** Updates the cached viewport size. */
|
|
_updateViewportSize() {
|
|
const window = this._getWindow();
|
|
this._viewportSize = this._platform.isBrowser
|
|
? { width: window.innerWidth, height: window.innerHeight }
|
|
: { width: 0, height: 0 };
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ViewportRuler, deps: [{ token: i1.Platform }, { token: i0.NgZone }, { token: DOCUMENT, optional: true }], target: i0.ɵɵFactoryTarget.Injectable }); }
|
|
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ViewportRuler, providedIn: 'root' }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ViewportRuler, decorators: [{
|
|
type: Injectable,
|
|
args: [{ providedIn: 'root' }]
|
|
}], ctorParameters: function () { return [{ type: i1.Platform }, { type: i0.NgZone }, { type: undefined, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [DOCUMENT]
|
|
}] }]; } });
|
|
|
|
const VIRTUAL_SCROLLABLE = new InjectionToken('VIRTUAL_SCROLLABLE');
|
|
/**
|
|
* Extending the {@link CdkScrollable} to be used as scrolling container for virtual scrolling.
|
|
*/
|
|
class CdkVirtualScrollable extends CdkScrollable {
|
|
constructor(elementRef, scrollDispatcher, ngZone, dir) {
|
|
super(elementRef, scrollDispatcher, ngZone, dir);
|
|
}
|
|
/**
|
|
* Measure the viewport size for the provided orientation.
|
|
*
|
|
* @param orientation The orientation to measure the size from.
|
|
*/
|
|
measureViewportSize(orientation) {
|
|
const viewportEl = this.elementRef.nativeElement;
|
|
return orientation === 'horizontal' ? viewportEl.clientWidth : viewportEl.clientHeight;
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollable, deps: [{ token: i0.ElementRef }, { token: ScrollDispatcher }, { token: i0.NgZone }, { token: i2.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkVirtualScrollable, usesInheritance: true, ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollable, decorators: [{
|
|
type: Directive
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: ScrollDispatcher }, { type: i0.NgZone }, { type: i2.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }]; } });
|
|
|
|
/** Checks if the given ranges are equal. */
|
|
function rangesEqual(r1, r2) {
|
|
return r1.start == r2.start && r1.end == r2.end;
|
|
}
|
|
/**
|
|
* Scheduler to be used for scroll events. Needs to fall back to
|
|
* something that doesn't rely on requestAnimationFrame on environments
|
|
* that don't support it (e.g. server-side rendering).
|
|
*/
|
|
const SCROLL_SCHEDULER = typeof requestAnimationFrame !== 'undefined' ? animationFrameScheduler : asapScheduler;
|
|
/** A viewport that virtualizes its scrolling with the help of `CdkVirtualForOf`. */
|
|
class CdkVirtualScrollViewport extends CdkVirtualScrollable {
|
|
/** The direction the viewport scrolls. */
|
|
get orientation() {
|
|
return this._orientation;
|
|
}
|
|
set orientation(orientation) {
|
|
if (this._orientation !== orientation) {
|
|
this._orientation = orientation;
|
|
this._calculateSpacerSize();
|
|
}
|
|
}
|
|
/**
|
|
* Whether rendered items should persist in the DOM after scrolling out of view. By default, items
|
|
* will be removed.
|
|
*/
|
|
get appendOnly() {
|
|
return this._appendOnly;
|
|
}
|
|
set appendOnly(value) {
|
|
this._appendOnly = coerceBooleanProperty(value);
|
|
}
|
|
constructor(elementRef, _changeDetectorRef, ngZone, _scrollStrategy, dir, scrollDispatcher, viewportRuler, scrollable) {
|
|
super(elementRef, scrollDispatcher, ngZone, dir);
|
|
this.elementRef = elementRef;
|
|
this._changeDetectorRef = _changeDetectorRef;
|
|
this._scrollStrategy = _scrollStrategy;
|
|
this.scrollable = scrollable;
|
|
this._platform = inject(Platform);
|
|
/** Emits when the viewport is detached from a CdkVirtualForOf. */
|
|
this._detachedSubject = new Subject();
|
|
/** Emits when the rendered range changes. */
|
|
this._renderedRangeSubject = new Subject();
|
|
this._orientation = 'vertical';
|
|
this._appendOnly = false;
|
|
// Note: we don't use the typical EventEmitter here because we need to subscribe to the scroll
|
|
// strategy lazily (i.e. only if the user is actually listening to the events). We do this because
|
|
// depending on how the strategy calculates the scrolled index, it may come at a cost to
|
|
// performance.
|
|
/** Emits when the index of the first element visible in the viewport changes. */
|
|
this.scrolledIndexChange = new Observable((observer) => this._scrollStrategy.scrolledIndexChange.subscribe(index => Promise.resolve().then(() => this.ngZone.run(() => observer.next(index)))));
|
|
/** A stream that emits whenever the rendered range changes. */
|
|
this.renderedRangeStream = this._renderedRangeSubject;
|
|
/**
|
|
* The total size of all content (in pixels), including content that is not currently rendered.
|
|
*/
|
|
this._totalContentSize = 0;
|
|
/** A string representing the `style.width` property value to be used for the spacer element. */
|
|
this._totalContentWidth = '';
|
|
/** A string representing the `style.height` property value to be used for the spacer element. */
|
|
this._totalContentHeight = '';
|
|
/** The currently rendered range of indices. */
|
|
this._renderedRange = { start: 0, end: 0 };
|
|
/** The length of the data bound to this viewport (in number of items). */
|
|
this._dataLength = 0;
|
|
/** The size of the viewport (in pixels). */
|
|
this._viewportSize = 0;
|
|
/** The last rendered content offset that was set. */
|
|
this._renderedContentOffset = 0;
|
|
/**
|
|
* Whether the last rendered content offset was to the end of the content (and therefore needs to
|
|
* be rewritten as an offset to the start of the content).
|
|
*/
|
|
this._renderedContentOffsetNeedsRewrite = false;
|
|
/** Whether there is a pending change detection cycle. */
|
|
this._isChangeDetectionPending = false;
|
|
/** A list of functions to run after the next change detection cycle. */
|
|
this._runAfterChangeDetection = [];
|
|
/** Subscription to changes in the viewport size. */
|
|
this._viewportChanges = Subscription.EMPTY;
|
|
if (!_scrollStrategy && (typeof ngDevMode === 'undefined' || ngDevMode)) {
|
|
throw Error('Error: cdk-virtual-scroll-viewport requires the "itemSize" property to be set.');
|
|
}
|
|
this._viewportChanges = viewportRuler.change().subscribe(() => {
|
|
this.checkViewportSize();
|
|
});
|
|
if (!this.scrollable) {
|
|
// No scrollable is provided, so the virtual-scroll-viewport needs to become a scrollable
|
|
this.elementRef.nativeElement.classList.add('cdk-virtual-scrollable');
|
|
this.scrollable = this;
|
|
}
|
|
}
|
|
ngOnInit() {
|
|
// Scrolling depends on the element dimensions which we can't get during SSR.
|
|
if (!this._platform.isBrowser) {
|
|
return;
|
|
}
|
|
if (this.scrollable === this) {
|
|
super.ngOnInit();
|
|
}
|
|
// It's still too early to measure the viewport at this point. Deferring with a promise allows
|
|
// the Viewport to be rendered with the correct size before we measure. We run this outside the
|
|
// zone to avoid causing more change detection cycles. We handle the change detection loop
|
|
// ourselves instead.
|
|
this.ngZone.runOutsideAngular(() => Promise.resolve().then(() => {
|
|
this._measureViewportSize();
|
|
this._scrollStrategy.attach(this);
|
|
this.scrollable
|
|
.elementScrolled()
|
|
.pipe(
|
|
// Start off with a fake scroll event so we properly detect our initial position.
|
|
startWith(null),
|
|
// Collect multiple events into one until the next animation frame. This way if
|
|
// there are multiple scroll events in the same frame we only need to recheck
|
|
// our layout once.
|
|
auditTime(0, SCROLL_SCHEDULER),
|
|
// Usually `elementScrolled` is completed when the scrollable is destroyed, but
|
|
// that may not be the case if a `CdkVirtualScrollableElement` is used so we have
|
|
// to unsubscribe here just in case.
|
|
takeUntil(this._destroyed))
|
|
.subscribe(() => this._scrollStrategy.onContentScrolled());
|
|
this._markChangeDetectionNeeded();
|
|
}));
|
|
}
|
|
ngOnDestroy() {
|
|
this.detach();
|
|
this._scrollStrategy.detach();
|
|
// Complete all subjects
|
|
this._renderedRangeSubject.complete();
|
|
this._detachedSubject.complete();
|
|
this._viewportChanges.unsubscribe();
|
|
super.ngOnDestroy();
|
|
}
|
|
/** Attaches a `CdkVirtualScrollRepeater` to this viewport. */
|
|
attach(forOf) {
|
|
if (this._forOf && (typeof ngDevMode === 'undefined' || ngDevMode)) {
|
|
throw Error('CdkVirtualScrollViewport is already attached.');
|
|
}
|
|
// Subscribe to the data stream of the CdkVirtualForOf to keep track of when the data length
|
|
// changes. Run outside the zone to avoid triggering change detection, since we're managing the
|
|
// change detection loop ourselves.
|
|
this.ngZone.runOutsideAngular(() => {
|
|
this._forOf = forOf;
|
|
this._forOf.dataStream.pipe(takeUntil(this._detachedSubject)).subscribe(data => {
|
|
const newLength = data.length;
|
|
if (newLength !== this._dataLength) {
|
|
this._dataLength = newLength;
|
|
this._scrollStrategy.onDataLengthChanged();
|
|
}
|
|
this._doChangeDetection();
|
|
});
|
|
});
|
|
}
|
|
/** Detaches the current `CdkVirtualForOf`. */
|
|
detach() {
|
|
this._forOf = null;
|
|
this._detachedSubject.next();
|
|
}
|
|
/** Gets the length of the data bound to this viewport (in number of items). */
|
|
getDataLength() {
|
|
return this._dataLength;
|
|
}
|
|
/** Gets the size of the viewport (in pixels). */
|
|
getViewportSize() {
|
|
return this._viewportSize;
|
|
}
|
|
// TODO(mmalerba): This is technically out of sync with what's really rendered until a render
|
|
// cycle happens. I'm being careful to only call it after the render cycle is complete and before
|
|
// setting it to something else, but its error prone and should probably be split into
|
|
// `pendingRange` and `renderedRange`, the latter reflecting whats actually in the DOM.
|
|
/** Get the current rendered range of items. */
|
|
getRenderedRange() {
|
|
return this._renderedRange;
|
|
}
|
|
measureBoundingClientRectWithScrollOffset(from) {
|
|
return this.getElementRef().nativeElement.getBoundingClientRect()[from];
|
|
}
|
|
/**
|
|
* Sets the total size of all content (in pixels), including content that is not currently
|
|
* rendered.
|
|
*/
|
|
setTotalContentSize(size) {
|
|
if (this._totalContentSize !== size) {
|
|
this._totalContentSize = size;
|
|
this._calculateSpacerSize();
|
|
this._markChangeDetectionNeeded();
|
|
}
|
|
}
|
|
/** Sets the currently rendered range of indices. */
|
|
setRenderedRange(range) {
|
|
if (!rangesEqual(this._renderedRange, range)) {
|
|
if (this.appendOnly) {
|
|
range = { start: 0, end: Math.max(this._renderedRange.end, range.end) };
|
|
}
|
|
this._renderedRangeSubject.next((this._renderedRange = range));
|
|
this._markChangeDetectionNeeded(() => this._scrollStrategy.onContentRendered());
|
|
}
|
|
}
|
|
/**
|
|
* Gets the offset from the start of the viewport to the start of the rendered data (in pixels).
|
|
*/
|
|
getOffsetToRenderedContentStart() {
|
|
return this._renderedContentOffsetNeedsRewrite ? null : this._renderedContentOffset;
|
|
}
|
|
/**
|
|
* Sets the offset from the start of the viewport to either the start or end of the rendered data
|
|
* (in pixels).
|
|
*/
|
|
setRenderedContentOffset(offset, to = 'to-start') {
|
|
// In appendOnly, we always start from the top
|
|
offset = this.appendOnly && to === 'to-start' ? 0 : offset;
|
|
// For a horizontal viewport in a right-to-left language we need to translate along the x-axis
|
|
// in the negative direction.
|
|
const isRtl = this.dir && this.dir.value == 'rtl';
|
|
const isHorizontal = this.orientation == 'horizontal';
|
|
const axis = isHorizontal ? 'X' : 'Y';
|
|
const axisDirection = isHorizontal && isRtl ? -1 : 1;
|
|
let transform = `translate${axis}(${Number(axisDirection * offset)}px)`;
|
|
this._renderedContentOffset = offset;
|
|
if (to === 'to-end') {
|
|
transform += ` translate${axis}(-100%)`;
|
|
// The viewport should rewrite this as a `to-start` offset on the next render cycle. Otherwise
|
|
// elements will appear to expand in the wrong direction (e.g. `mat-expansion-panel` would
|
|
// expand upward).
|
|
this._renderedContentOffsetNeedsRewrite = true;
|
|
}
|
|
if (this._renderedContentTransform != transform) {
|
|
// We know this value is safe because we parse `offset` with `Number()` before passing it
|
|
// into the string.
|
|
this._renderedContentTransform = transform;
|
|
this._markChangeDetectionNeeded(() => {
|
|
if (this._renderedContentOffsetNeedsRewrite) {
|
|
this._renderedContentOffset -= this.measureRenderedContentSize();
|
|
this._renderedContentOffsetNeedsRewrite = false;
|
|
this.setRenderedContentOffset(this._renderedContentOffset);
|
|
}
|
|
else {
|
|
this._scrollStrategy.onRenderedOffsetChanged();
|
|
}
|
|
});
|
|
}
|
|
}
|
|
/**
|
|
* Scrolls to the given offset from the start of the viewport. Please note that this is not always
|
|
* the same as setting `scrollTop` or `scrollLeft`. In a horizontal viewport with right-to-left
|
|
* direction, this would be the equivalent of setting a fictional `scrollRight` property.
|
|
* @param offset The offset to scroll to.
|
|
* @param behavior The ScrollBehavior to use when scrolling. Default is behavior is `auto`.
|
|
*/
|
|
scrollToOffset(offset, behavior = 'auto') {
|
|
const options = { behavior };
|
|
if (this.orientation === 'horizontal') {
|
|
options.start = offset;
|
|
}
|
|
else {
|
|
options.top = offset;
|
|
}
|
|
this.scrollable.scrollTo(options);
|
|
}
|
|
/**
|
|
* Scrolls to the offset for the given index.
|
|
* @param index The index of the element to scroll to.
|
|
* @param behavior The ScrollBehavior to use when scrolling. Default is behavior is `auto`.
|
|
*/
|
|
scrollToIndex(index, behavior = 'auto') {
|
|
this._scrollStrategy.scrollToIndex(index, behavior);
|
|
}
|
|
/**
|
|
* Gets the current scroll offset from the start of the scrollable (in pixels).
|
|
* @param from The edge to measure the offset from. Defaults to 'top' in vertical mode and 'start'
|
|
* in horizontal mode.
|
|
*/
|
|
measureScrollOffset(from) {
|
|
// This is to break the call cycle
|
|
let measureScrollOffset;
|
|
if (this.scrollable == this) {
|
|
measureScrollOffset = (_from) => super.measureScrollOffset(_from);
|
|
}
|
|
else {
|
|
measureScrollOffset = (_from) => this.scrollable.measureScrollOffset(_from);
|
|
}
|
|
return Math.max(0, measureScrollOffset(from ?? (this.orientation === 'horizontal' ? 'start' : 'top')) -
|
|
this.measureViewportOffset());
|
|
}
|
|
/**
|
|
* Measures the offset of the viewport from the scrolling container
|
|
* @param from The edge to measure from.
|
|
*/
|
|
measureViewportOffset(from) {
|
|
let fromRect;
|
|
const LEFT = 'left';
|
|
const RIGHT = 'right';
|
|
const isRtl = this.dir?.value == 'rtl';
|
|
if (from == 'start') {
|
|
fromRect = isRtl ? RIGHT : LEFT;
|
|
}
|
|
else if (from == 'end') {
|
|
fromRect = isRtl ? LEFT : RIGHT;
|
|
}
|
|
else if (from) {
|
|
fromRect = from;
|
|
}
|
|
else {
|
|
fromRect = this.orientation === 'horizontal' ? 'left' : 'top';
|
|
}
|
|
const scrollerClientRect = this.scrollable.measureBoundingClientRectWithScrollOffset(fromRect);
|
|
const viewportClientRect = this.elementRef.nativeElement.getBoundingClientRect()[fromRect];
|
|
return viewportClientRect - scrollerClientRect;
|
|
}
|
|
/** Measure the combined size of all of the rendered items. */
|
|
measureRenderedContentSize() {
|
|
const contentEl = this._contentWrapper.nativeElement;
|
|
return this.orientation === 'horizontal' ? contentEl.offsetWidth : contentEl.offsetHeight;
|
|
}
|
|
/**
|
|
* Measure the total combined size of the given range. Throws if the range includes items that are
|
|
* not rendered.
|
|
*/
|
|
measureRangeSize(range) {
|
|
if (!this._forOf) {
|
|
return 0;
|
|
}
|
|
return this._forOf.measureRangeSize(range, this.orientation);
|
|
}
|
|
/** Update the viewport dimensions and re-render. */
|
|
checkViewportSize() {
|
|
// TODO: Cleanup later when add logic for handling content resize
|
|
this._measureViewportSize();
|
|
this._scrollStrategy.onDataLengthChanged();
|
|
}
|
|
/** Measure the viewport size. */
|
|
_measureViewportSize() {
|
|
this._viewportSize = this.scrollable.measureViewportSize(this.orientation);
|
|
}
|
|
/** Queue up change detection to run. */
|
|
_markChangeDetectionNeeded(runAfter) {
|
|
if (runAfter) {
|
|
this._runAfterChangeDetection.push(runAfter);
|
|
}
|
|
// Use a Promise to batch together calls to `_doChangeDetection`. This way if we set a bunch of
|
|
// properties sequentially we only have to run `_doChangeDetection` once at the end.
|
|
if (!this._isChangeDetectionPending) {
|
|
this._isChangeDetectionPending = true;
|
|
this.ngZone.runOutsideAngular(() => Promise.resolve().then(() => {
|
|
this._doChangeDetection();
|
|
}));
|
|
}
|
|
}
|
|
/** Run change detection. */
|
|
_doChangeDetection() {
|
|
this._isChangeDetectionPending = false;
|
|
// Apply the content transform. The transform can't be set via an Angular binding because
|
|
// bypassSecurityTrustStyle is banned in Google. However the value is safe, it's composed of
|
|
// string literals, a variable that can only be 'X' or 'Y', and user input that is run through
|
|
// the `Number` function first to coerce it to a numeric value.
|
|
this._contentWrapper.nativeElement.style.transform = this._renderedContentTransform;
|
|
// Apply changes to Angular bindings. Note: We must call `markForCheck` to run change detection
|
|
// from the root, since the repeated items are content projected in. Calling `detectChanges`
|
|
// instead does not properly check the projected content.
|
|
this.ngZone.run(() => this._changeDetectorRef.markForCheck());
|
|
const runAfterChangeDetection = this._runAfterChangeDetection;
|
|
this._runAfterChangeDetection = [];
|
|
for (const fn of runAfterChangeDetection) {
|
|
fn();
|
|
}
|
|
}
|
|
/** Calculates the `style.width` and `style.height` for the spacer element. */
|
|
_calculateSpacerSize() {
|
|
this._totalContentHeight =
|
|
this.orientation === 'horizontal' ? '' : `${this._totalContentSize}px`;
|
|
this._totalContentWidth =
|
|
this.orientation === 'horizontal' ? `${this._totalContentSize}px` : '';
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollViewport, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: i0.NgZone }, { token: VIRTUAL_SCROLL_STRATEGY, optional: true }, { token: i2.Directionality, optional: true }, { token: ScrollDispatcher }, { token: ViewportRuler }, { token: VIRTUAL_SCROLLABLE, optional: true }], target: i0.ɵɵFactoryTarget.Component }); }
|
|
static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.1.1", type: CdkVirtualScrollViewport, isStandalone: true, selector: "cdk-virtual-scroll-viewport", inputs: { orientation: "orientation", appendOnly: "appendOnly" }, outputs: { scrolledIndexChange: "scrolledIndexChange" }, host: { properties: { "class.cdk-virtual-scroll-orientation-horizontal": "orientation === \"horizontal\"", "class.cdk-virtual-scroll-orientation-vertical": "orientation !== \"horizontal\"" }, classAttribute: "cdk-virtual-scroll-viewport" }, providers: [
|
|
{
|
|
provide: CdkScrollable,
|
|
useFactory: (virtualScrollable, viewport) => virtualScrollable || viewport,
|
|
deps: [[new Optional(), new Inject(VIRTUAL_SCROLLABLE)], CdkVirtualScrollViewport],
|
|
},
|
|
], viewQueries: [{ propertyName: "_contentWrapper", first: true, predicate: ["contentWrapper"], descendants: true, static: true }], usesInheritance: true, ngImport: i0, template: "<!--\n Wrap the rendered content in an element that will be used to offset it based on the scroll\n position.\n-->\n<div #contentWrapper class=\"cdk-virtual-scroll-content-wrapper\">\n <ng-content></ng-content>\n</div>\n<!--\n Spacer used to force the scrolling container to the correct size for the *total* number of items\n so that the scrollbar captures the size of the entire data set.\n-->\n<div class=\"cdk-virtual-scroll-spacer\"\n [style.width]=\"_totalContentWidth\" [style.height]=\"_totalContentHeight\"></div>\n", styles: ["cdk-virtual-scroll-viewport{display:block;position:relative;transform:translateZ(0)}.cdk-virtual-scrollable{overflow:auto;will-change:scroll-position;contain:strict;-webkit-overflow-scrolling:touch}.cdk-virtual-scroll-content-wrapper{position:absolute;top:0;left:0;contain:content}[dir=rtl] .cdk-virtual-scroll-content-wrapper{right:0;left:auto}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper{min-height:100%}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-left:0;padding-right:0;margin-left:0;margin-right:0;border-left-width:0;border-right-width:0;outline:none}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper{min-width:100%}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-top:0;padding-bottom:0;margin-top:0;margin-bottom:0;border-top-width:0;border-bottom-width:0;outline:none}.cdk-virtual-scroll-spacer{height:1px;transform-origin:0 0;flex:0 0 auto}[dir=rtl] .cdk-virtual-scroll-spacer{transform-origin:100% 0}"], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollViewport, decorators: [{
|
|
type: Component,
|
|
args: [{ selector: 'cdk-virtual-scroll-viewport', host: {
|
|
'class': 'cdk-virtual-scroll-viewport',
|
|
'[class.cdk-virtual-scroll-orientation-horizontal]': 'orientation === "horizontal"',
|
|
'[class.cdk-virtual-scroll-orientation-vertical]': 'orientation !== "horizontal"',
|
|
}, encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, standalone: true, providers: [
|
|
{
|
|
provide: CdkScrollable,
|
|
useFactory: (virtualScrollable, viewport) => virtualScrollable || viewport,
|
|
deps: [[new Optional(), new Inject(VIRTUAL_SCROLLABLE)], CdkVirtualScrollViewport],
|
|
},
|
|
], template: "<!--\n Wrap the rendered content in an element that will be used to offset it based on the scroll\n position.\n-->\n<div #contentWrapper class=\"cdk-virtual-scroll-content-wrapper\">\n <ng-content></ng-content>\n</div>\n<!--\n Spacer used to force the scrolling container to the correct size for the *total* number of items\n so that the scrollbar captures the size of the entire data set.\n-->\n<div class=\"cdk-virtual-scroll-spacer\"\n [style.width]=\"_totalContentWidth\" [style.height]=\"_totalContentHeight\"></div>\n", styles: ["cdk-virtual-scroll-viewport{display:block;position:relative;transform:translateZ(0)}.cdk-virtual-scrollable{overflow:auto;will-change:scroll-position;contain:strict;-webkit-overflow-scrolling:touch}.cdk-virtual-scroll-content-wrapper{position:absolute;top:0;left:0;contain:content}[dir=rtl] .cdk-virtual-scroll-content-wrapper{right:0;left:auto}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper{min-height:100%}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-left:0;padding-right:0;margin-left:0;margin-right:0;border-left-width:0;border-right-width:0;outline:none}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper{min-width:100%}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-top:0;padding-bottom:0;margin-top:0;margin-bottom:0;border-top-width:0;border-bottom-width:0;outline:none}.cdk-virtual-scroll-spacer{height:1px;transform-origin:0 0;flex:0 0 auto}[dir=rtl] .cdk-virtual-scroll-spacer{transform-origin:100% 0}"] }]
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: i0.NgZone }, { type: undefined, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [VIRTUAL_SCROLL_STRATEGY]
|
|
}] }, { type: i2.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }, { type: ScrollDispatcher }, { type: ViewportRuler }, { type: CdkVirtualScrollable, decorators: [{
|
|
type: Optional
|
|
}, {
|
|
type: Inject,
|
|
args: [VIRTUAL_SCROLLABLE]
|
|
}] }]; }, propDecorators: { orientation: [{
|
|
type: Input
|
|
}], appendOnly: [{
|
|
type: Input
|
|
}], scrolledIndexChange: [{
|
|
type: Output
|
|
}], _contentWrapper: [{
|
|
type: ViewChild,
|
|
args: ['contentWrapper', { static: true }]
|
|
}] } });
|
|
|
|
/** Helper to extract the offset of a DOM Node in a certain direction. */
|
|
function getOffset(orientation, direction, node) {
|
|
const el = node;
|
|
if (!el.getBoundingClientRect) {
|
|
return 0;
|
|
}
|
|
const rect = el.getBoundingClientRect();
|
|
if (orientation === 'horizontal') {
|
|
return direction === 'start' ? rect.left : rect.right;
|
|
}
|
|
return direction === 'start' ? rect.top : rect.bottom;
|
|
}
|
|
/**
|
|
* A directive similar to `ngForOf` to be used for rendering data inside a virtual scrolling
|
|
* container.
|
|
*/
|
|
class CdkVirtualForOf {
|
|
/** The DataSource to display. */
|
|
get cdkVirtualForOf() {
|
|
return this._cdkVirtualForOf;
|
|
}
|
|
set cdkVirtualForOf(value) {
|
|
this._cdkVirtualForOf = value;
|
|
if (isDataSource(value)) {
|
|
this._dataSourceChanges.next(value);
|
|
}
|
|
else {
|
|
// If value is an an NgIterable, convert it to an array.
|
|
this._dataSourceChanges.next(new ArrayDataSource(isObservable(value) ? value : Array.from(value || [])));
|
|
}
|
|
}
|
|
/**
|
|
* The `TrackByFunction` to use for tracking changes. The `TrackByFunction` takes the index and
|
|
* the item and produces a value to be used as the item's identity when tracking changes.
|
|
*/
|
|
get cdkVirtualForTrackBy() {
|
|
return this._cdkVirtualForTrackBy;
|
|
}
|
|
set cdkVirtualForTrackBy(fn) {
|
|
this._needsUpdate = true;
|
|
this._cdkVirtualForTrackBy = fn
|
|
? (index, item) => fn(index + (this._renderedRange ? this._renderedRange.start : 0), item)
|
|
: undefined;
|
|
}
|
|
/** The template used to stamp out new elements. */
|
|
set cdkVirtualForTemplate(value) {
|
|
if (value) {
|
|
this._needsUpdate = true;
|
|
this._template = value;
|
|
}
|
|
}
|
|
/**
|
|
* The size of the cache used to store templates that are not being used for re-use later.
|
|
* Setting the cache size to `0` will disable caching. Defaults to 20 templates.
|
|
*/
|
|
get cdkVirtualForTemplateCacheSize() {
|
|
return this._viewRepeater.viewCacheSize;
|
|
}
|
|
set cdkVirtualForTemplateCacheSize(size) {
|
|
this._viewRepeater.viewCacheSize = coerceNumberProperty(size);
|
|
}
|
|
constructor(
|
|
/** The view container to add items to. */
|
|
_viewContainerRef,
|
|
/** The template to use when stamping out new items. */
|
|
_template,
|
|
/** The set of available differs. */
|
|
_differs,
|
|
/** The strategy used to render items in the virtual scroll viewport. */
|
|
_viewRepeater,
|
|
/** The virtual scrolling viewport that these items are being rendered in. */
|
|
_viewport, ngZone) {
|
|
this._viewContainerRef = _viewContainerRef;
|
|
this._template = _template;
|
|
this._differs = _differs;
|
|
this._viewRepeater = _viewRepeater;
|
|
this._viewport = _viewport;
|
|
/** Emits when the rendered view of the data changes. */
|
|
this.viewChange = new Subject();
|
|
/** Subject that emits when a new DataSource instance is given. */
|
|
this._dataSourceChanges = new Subject();
|
|
/** Emits whenever the data in the current DataSource changes. */
|
|
this.dataStream = this._dataSourceChanges.pipe(
|
|
// Start off with null `DataSource`.
|
|
startWith(null),
|
|
// Bundle up the previous and current data sources so we can work with both.
|
|
pairwise(),
|
|
// Use `_changeDataSource` to disconnect from the previous data source and connect to the
|
|
// new one, passing back a stream of data changes which we run through `switchMap` to give
|
|
// us a data stream that emits the latest data from whatever the current `DataSource` is.
|
|
switchMap(([prev, cur]) => this._changeDataSource(prev, cur)),
|
|
// Replay the last emitted data when someone subscribes.
|
|
shareReplay(1));
|
|
/** The differ used to calculate changes to the data. */
|
|
this._differ = null;
|
|
/** Whether the rendered data should be updated during the next ngDoCheck cycle. */
|
|
this._needsUpdate = false;
|
|
this._destroyed = new Subject();
|
|
this.dataStream.subscribe(data => {
|
|
this._data = data;
|
|
this._onRenderedDataChange();
|
|
});
|
|
this._viewport.renderedRangeStream.pipe(takeUntil(this._destroyed)).subscribe(range => {
|
|
this._renderedRange = range;
|
|
if (this.viewChange.observers.length) {
|
|
ngZone.run(() => this.viewChange.next(this._renderedRange));
|
|
}
|
|
this._onRenderedDataChange();
|
|
});
|
|
this._viewport.attach(this);
|
|
}
|
|
/**
|
|
* Measures the combined size (width for horizontal orientation, height for vertical) of all items
|
|
* in the specified range. Throws an error if the range includes items that are not currently
|
|
* rendered.
|
|
*/
|
|
measureRangeSize(range, orientation) {
|
|
if (range.start >= range.end) {
|
|
return 0;
|
|
}
|
|
if ((range.start < this._renderedRange.start || range.end > this._renderedRange.end) &&
|
|
(typeof ngDevMode === 'undefined' || ngDevMode)) {
|
|
throw Error(`Error: attempted to measure an item that isn't rendered.`);
|
|
}
|
|
// The index into the list of rendered views for the first item in the range.
|
|
const renderedStartIndex = range.start - this._renderedRange.start;
|
|
// The length of the range we're measuring.
|
|
const rangeLen = range.end - range.start;
|
|
// Loop over all the views, find the first and land node and compute the size by subtracting
|
|
// the top of the first node from the bottom of the last one.
|
|
let firstNode;
|
|
let lastNode;
|
|
// Find the first node by starting from the beginning and going forwards.
|
|
for (let i = 0; i < rangeLen; i++) {
|
|
const view = this._viewContainerRef.get(i + renderedStartIndex);
|
|
if (view && view.rootNodes.length) {
|
|
firstNode = lastNode = view.rootNodes[0];
|
|
break;
|
|
}
|
|
}
|
|
// Find the last node by starting from the end and going backwards.
|
|
for (let i = rangeLen - 1; i > -1; i--) {
|
|
const view = this._viewContainerRef.get(i + renderedStartIndex);
|
|
if (view && view.rootNodes.length) {
|
|
lastNode = view.rootNodes[view.rootNodes.length - 1];
|
|
break;
|
|
}
|
|
}
|
|
return firstNode && lastNode
|
|
? getOffset(orientation, 'end', lastNode) - getOffset(orientation, 'start', firstNode)
|
|
: 0;
|
|
}
|
|
ngDoCheck() {
|
|
if (this._differ && this._needsUpdate) {
|
|
// TODO(mmalerba): We should differentiate needs update due to scrolling and a new portion of
|
|
// this list being rendered (can use simpler algorithm) vs needs update due to data actually
|
|
// changing (need to do this diff).
|
|
const changes = this._differ.diff(this._renderedItems);
|
|
if (!changes) {
|
|
this._updateContext();
|
|
}
|
|
else {
|
|
this._applyChanges(changes);
|
|
}
|
|
this._needsUpdate = false;
|
|
}
|
|
}
|
|
ngOnDestroy() {
|
|
this._viewport.detach();
|
|
this._dataSourceChanges.next(undefined);
|
|
this._dataSourceChanges.complete();
|
|
this.viewChange.complete();
|
|
this._destroyed.next();
|
|
this._destroyed.complete();
|
|
this._viewRepeater.detach();
|
|
}
|
|
/** React to scroll state changes in the viewport. */
|
|
_onRenderedDataChange() {
|
|
if (!this._renderedRange) {
|
|
return;
|
|
}
|
|
this._renderedItems = this._data.slice(this._renderedRange.start, this._renderedRange.end);
|
|
if (!this._differ) {
|
|
// Use a wrapper function for the `trackBy` so any new values are
|
|
// picked up automatically without having to recreate the differ.
|
|
this._differ = this._differs.find(this._renderedItems).create((index, item) => {
|
|
return this.cdkVirtualForTrackBy ? this.cdkVirtualForTrackBy(index, item) : item;
|
|
});
|
|
}
|
|
this._needsUpdate = true;
|
|
}
|
|
/** Swap out one `DataSource` for another. */
|
|
_changeDataSource(oldDs, newDs) {
|
|
if (oldDs) {
|
|
oldDs.disconnect(this);
|
|
}
|
|
this._needsUpdate = true;
|
|
return newDs ? newDs.connect(this) : of();
|
|
}
|
|
/** Update the `CdkVirtualForOfContext` for all views. */
|
|
_updateContext() {
|
|
const count = this._data.length;
|
|
let i = this._viewContainerRef.length;
|
|
while (i--) {
|
|
const view = this._viewContainerRef.get(i);
|
|
view.context.index = this._renderedRange.start + i;
|
|
view.context.count = count;
|
|
this._updateComputedContextProperties(view.context);
|
|
view.detectChanges();
|
|
}
|
|
}
|
|
/** Apply changes to the DOM. */
|
|
_applyChanges(changes) {
|
|
this._viewRepeater.applyChanges(changes, this._viewContainerRef, (record, _adjustedPreviousIndex, currentIndex) => this._getEmbeddedViewArgs(record, currentIndex), record => record.item);
|
|
// Update $implicit for any items that had an identity change.
|
|
changes.forEachIdentityChange((record) => {
|
|
const view = this._viewContainerRef.get(record.currentIndex);
|
|
view.context.$implicit = record.item;
|
|
});
|
|
// Update the context variables on all items.
|
|
const count = this._data.length;
|
|
let i = this._viewContainerRef.length;
|
|
while (i--) {
|
|
const view = this._viewContainerRef.get(i);
|
|
view.context.index = this._renderedRange.start + i;
|
|
view.context.count = count;
|
|
this._updateComputedContextProperties(view.context);
|
|
}
|
|
}
|
|
/** Update the computed properties on the `CdkVirtualForOfContext`. */
|
|
_updateComputedContextProperties(context) {
|
|
context.first = context.index === 0;
|
|
context.last = context.index === context.count - 1;
|
|
context.even = context.index % 2 === 0;
|
|
context.odd = !context.even;
|
|
}
|
|
_getEmbeddedViewArgs(record, index) {
|
|
// Note that it's important that we insert the item directly at the proper index,
|
|
// rather than inserting it and the moving it in place, because if there's a directive
|
|
// on the same node that injects the `ViewContainerRef`, Angular will insert another
|
|
// comment node which can throw off the move when it's being repeated for all items.
|
|
return {
|
|
templateRef: this._template,
|
|
context: {
|
|
$implicit: record.item,
|
|
// It's guaranteed that the iterable is not "undefined" or "null" because we only
|
|
// generate views for elements if the "cdkVirtualForOf" iterable has elements.
|
|
cdkVirtualForOf: this._cdkVirtualForOf,
|
|
index: -1,
|
|
count: -1,
|
|
first: false,
|
|
last: false,
|
|
odd: false,
|
|
even: false,
|
|
},
|
|
index,
|
|
};
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualForOf, deps: [{ token: i0.ViewContainerRef }, { token: i0.TemplateRef }, { token: i0.IterableDiffers }, { token: _VIEW_REPEATER_STRATEGY }, { token: CdkVirtualScrollViewport, skipSelf: true }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkVirtualForOf, isStandalone: true, selector: "[cdkVirtualFor][cdkVirtualForOf]", inputs: { cdkVirtualForOf: "cdkVirtualForOf", cdkVirtualForTrackBy: "cdkVirtualForTrackBy", cdkVirtualForTemplate: "cdkVirtualForTemplate", cdkVirtualForTemplateCacheSize: "cdkVirtualForTemplateCacheSize" }, providers: [{ provide: _VIEW_REPEATER_STRATEGY, useClass: _RecycleViewRepeaterStrategy }], ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualForOf, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdkVirtualFor][cdkVirtualForOf]',
|
|
providers: [{ provide: _VIEW_REPEATER_STRATEGY, useClass: _RecycleViewRepeaterStrategy }],
|
|
standalone: true,
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.ViewContainerRef }, { type: i0.TemplateRef }, { type: i0.IterableDiffers }, { type: i2$1._RecycleViewRepeaterStrategy, decorators: [{
|
|
type: Inject,
|
|
args: [_VIEW_REPEATER_STRATEGY]
|
|
}] }, { type: CdkVirtualScrollViewport, decorators: [{
|
|
type: SkipSelf
|
|
}] }, { type: i0.NgZone }]; }, propDecorators: { cdkVirtualForOf: [{
|
|
type: Input
|
|
}], cdkVirtualForTrackBy: [{
|
|
type: Input
|
|
}], cdkVirtualForTemplate: [{
|
|
type: Input
|
|
}], cdkVirtualForTemplateCacheSize: [{
|
|
type: Input
|
|
}] } });
|
|
|
|
/**
|
|
* Provides a virtual scrollable for the element it is attached to.
|
|
*/
|
|
class CdkVirtualScrollableElement extends CdkVirtualScrollable {
|
|
constructor(elementRef, scrollDispatcher, ngZone, dir) {
|
|
super(elementRef, scrollDispatcher, ngZone, dir);
|
|
}
|
|
measureBoundingClientRectWithScrollOffset(from) {
|
|
return (this.getElementRef().nativeElement.getBoundingClientRect()[from] -
|
|
this.measureScrollOffset(from));
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollableElement, deps: [{ token: i0.ElementRef }, { token: ScrollDispatcher }, { token: i0.NgZone }, { token: i2.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkVirtualScrollableElement, isStandalone: true, selector: "[cdkVirtualScrollingElement]", host: { classAttribute: "cdk-virtual-scrollable" }, providers: [{ provide: VIRTUAL_SCROLLABLE, useExisting: CdkVirtualScrollableElement }], usesInheritance: true, ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollableElement, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: '[cdkVirtualScrollingElement]',
|
|
providers: [{ provide: VIRTUAL_SCROLLABLE, useExisting: CdkVirtualScrollableElement }],
|
|
standalone: true,
|
|
host: {
|
|
'class': 'cdk-virtual-scrollable',
|
|
},
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: ScrollDispatcher }, { type: i0.NgZone }, { type: i2.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }]; } });
|
|
|
|
/**
|
|
* Provides as virtual scrollable for the global / window scrollbar.
|
|
*/
|
|
class CdkVirtualScrollableWindow extends CdkVirtualScrollable {
|
|
constructor(scrollDispatcher, ngZone, dir) {
|
|
super(new ElementRef(document.documentElement), scrollDispatcher, ngZone, dir);
|
|
this._elementScrolled = new Observable((observer) => this.ngZone.runOutsideAngular(() => fromEvent(document, 'scroll').pipe(takeUntil(this._destroyed)).subscribe(observer)));
|
|
}
|
|
measureBoundingClientRectWithScrollOffset(from) {
|
|
return this.getElementRef().nativeElement.getBoundingClientRect()[from];
|
|
}
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollableWindow, deps: [{ token: ScrollDispatcher }, { token: i0.NgZone }, { token: i2.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
|
|
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.1", type: CdkVirtualScrollableWindow, isStandalone: true, selector: "cdk-virtual-scroll-viewport[scrollWindow]", providers: [{ provide: VIRTUAL_SCROLLABLE, useExisting: CdkVirtualScrollableWindow }], usesInheritance: true, ngImport: i0 }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkVirtualScrollableWindow, decorators: [{
|
|
type: Directive,
|
|
args: [{
|
|
selector: 'cdk-virtual-scroll-viewport[scrollWindow]',
|
|
providers: [{ provide: VIRTUAL_SCROLLABLE, useExisting: CdkVirtualScrollableWindow }],
|
|
standalone: true,
|
|
}]
|
|
}], ctorParameters: function () { return [{ type: ScrollDispatcher }, { type: i0.NgZone }, { type: i2.Directionality, decorators: [{
|
|
type: Optional
|
|
}] }]; } });
|
|
|
|
class CdkScrollableModule {
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkScrollableModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
|
|
static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.1.1", ngImport: i0, type: CdkScrollableModule, imports: [CdkScrollable], exports: [CdkScrollable] }); }
|
|
static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkScrollableModule }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: CdkScrollableModule, decorators: [{
|
|
type: NgModule,
|
|
args: [{
|
|
exports: [CdkScrollable],
|
|
imports: [CdkScrollable],
|
|
}]
|
|
}] });
|
|
/**
|
|
* @docs-primary-export
|
|
*/
|
|
class ScrollingModule {
|
|
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ScrollingModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
|
|
static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.1.1", ngImport: i0, type: ScrollingModule, imports: [BidiModule, CdkScrollableModule, CdkVirtualScrollViewport,
|
|
CdkFixedSizeVirtualScroll,
|
|
CdkVirtualForOf,
|
|
CdkVirtualScrollableWindow,
|
|
CdkVirtualScrollableElement], exports: [BidiModule, CdkScrollableModule, CdkFixedSizeVirtualScroll,
|
|
CdkVirtualForOf,
|
|
CdkVirtualScrollViewport,
|
|
CdkVirtualScrollableWindow,
|
|
CdkVirtualScrollableElement] }); }
|
|
static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ScrollingModule, imports: [BidiModule,
|
|
CdkScrollableModule, BidiModule, CdkScrollableModule] }); }
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.1", ngImport: i0, type: ScrollingModule, decorators: [{
|
|
type: NgModule,
|
|
args: [{
|
|
imports: [
|
|
BidiModule,
|
|
CdkScrollableModule,
|
|
CdkVirtualScrollViewport,
|
|
CdkFixedSizeVirtualScroll,
|
|
CdkVirtualForOf,
|
|
CdkVirtualScrollableWindow,
|
|
CdkVirtualScrollableElement,
|
|
],
|
|
exports: [
|
|
BidiModule,
|
|
CdkScrollableModule,
|
|
CdkFixedSizeVirtualScroll,
|
|
CdkVirtualForOf,
|
|
CdkVirtualScrollViewport,
|
|
CdkVirtualScrollableWindow,
|
|
CdkVirtualScrollableElement,
|
|
],
|
|
}]
|
|
}] });
|
|
|
|
/**
|
|
* Generated bundle index. Do not edit.
|
|
*/
|
|
|
|
export { CdkFixedSizeVirtualScroll, CdkScrollable, CdkScrollableModule, CdkVirtualForOf, CdkVirtualScrollViewport, CdkVirtualScrollable, CdkVirtualScrollableElement, CdkVirtualScrollableWindow, DEFAULT_RESIZE_TIME, DEFAULT_SCROLL_TIME, FixedSizeVirtualScrollStrategy, ScrollDispatcher, ScrollingModule, VIRTUAL_SCROLLABLE, VIRTUAL_SCROLL_STRATEGY, ViewportRuler, _fixedSizeVirtualScrollStrategyFactory };
|
|
//# sourceMappingURL=scrolling.mjs.map
|