ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
141 lines • 24.7 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { Component, ChangeDetectionStrategy, ContentChildren, ElementRef, ContentChild, ChangeDetectorRef } from '@angular/core';
import { BehaviorSubject, combineLatest, ReplaySubject, Subject } from 'rxjs';
import { filter, map, pairwise, startWith, switchMap, takeUntil, withLatestFrom } from 'rxjs/operators';
import { NzResizeObserver } from 'ng-zorro-antd/cdk/resize-observer';
import { NzOverflowItemDirective } from './overflow-item.directive';
import { NzOverflowRestDirective } from './overflow-rest.directive';
import { NzOverflowSuffixDirective } from './overflow-suffix.directive';
export class NzOverflowContainerComponent {
constructor(nzResizeObserver, elementRef, cdr) {
this.nzResizeObserver = nzResizeObserver;
this.elementRef = elementRef;
this.cdr = cdr;
this.contentInit$ = new Subject();
this.overflowItems = undefined;
this.overflowSuffix = undefined;
this.overflowRest = undefined;
this.overflowItems$ = new ReplaySubject(1);
this.destroy$ = new Subject();
this.containerWidth$ = this.nzResizeObserver
.observe(this.elementRef.nativeElement)
.pipe(map(([item]) => item.target.clientWidth || 0));
this.restWidth$ = new BehaviorSubject(0);
this.suffixWidth$ = new BehaviorSubject(0);
this.suffixFixedStart$ = new BehaviorSubject(null);
this.displayCount$ = new BehaviorSubject(Number.MAX_SAFE_INTEGER);
this.restReady$ = new BehaviorSubject(false);
this.maxRestWith$ = this.restWidth$.pipe(pairwise(), map(([prevRestWidth, restWidth]) => Math.max(prevRestWidth, restWidth)));
this.omittedItems$ = combineLatest([this.overflowItems$, this.displayCount$]).pipe(withLatestFrom(this.contentInit$), map(([[overflowItems, displayCount]]) => overflowItems.toArray().slice(displayCount + 1)));
this.displayRest$ = combineLatest([this.restReady$, this.omittedItems$]).pipe(map(([restReady, omittedItems]) => restReady && !!omittedItems.length));
}
updateDisplayCount(count, notReady) {
this.displayCount$.next(count);
if (this.overflowItems && !notReady) {
this.restReady$.next(count < this.overflowItems.length - 1);
}
}
ngOnInit() {
const overflowItemsWidth$ = this.overflowItems$.pipe(switchMap(items => combineLatest(items.map(item => item.itemWidth$))));
this.overflowItems$.pipe(takeUntil(this.destroy$)).subscribe(overflowItems => {
if (!overflowItems.length) {
this.displayCount$.next(0);
this.suffixFixedStart$.next(null);
}
});
combineLatest([overflowItemsWidth$, this.containerWidth$, this.maxRestWith$, this.restWidth$, this.suffixWidth$])
.pipe(filter(([, containerWidth, maxRestWith]) => !!(containerWidth && maxRestWith)), takeUntil(this.destroy$))
.subscribe(([overflowItemsWidth, containerWidth, maxRestWith, restWidth, suffixWidth]) => {
let totalWidth = suffixWidth;
const len = overflowItemsWidth.length;
const lastIndex = len - 1;
for (let i = 0; i < len; i += 1) {
const currentItemWidth = overflowItemsWidth[i];
// Break since data not ready
if (currentItemWidth === undefined) {
this.updateDisplayCount(i - 1, true);
break;
}
else {
// Find best match
totalWidth += currentItemWidth;
if (
// Only one means `totalWidth` is the final width
(lastIndex === 0 && totalWidth <= containerWidth) ||
// Last two width will be the final width
(i === lastIndex - 1 &&
overflowItemsWidth[lastIndex] !== undefined &&
totalWidth + overflowItemsWidth[lastIndex] <= containerWidth)) {
// Additional check if match the end
this.updateDisplayCount(lastIndex);
this.suffixFixedStart$.next(null);
break;
}
else if (totalWidth + maxRestWith > containerWidth) {
// Can not hold all the content to show rest
this.updateDisplayCount(i - 1);
this.suffixFixedStart$.next(totalWidth - currentItemWidth - suffixWidth + restWidth);
break;
}
this.cdr.detectChanges();
}
}
if (this.overflowSuffix &&
overflowItemsWidth[0] !== undefined &&
overflowItemsWidth[0] + suffixWidth > containerWidth) {
this.suffixFixedStart$.next(null);
}
this.cdr.detectChanges();
});
combineLatest([this.suffixFixedStart$, this.displayCount$])
.pipe(takeUntil(this.destroy$))
.subscribe(([suffixFixedStart, displayCount]) => {
var _a;
(_a = this.overflowSuffix) === null || _a === void 0 ? void 0 : _a.setSuffixStyle(suffixFixedStart, displayCount);
});
combineLatest([this.displayCount$, this.overflowItems$])
.pipe(takeUntil(this.destroy$))
.subscribe(([displayCount, overflowItems]) => overflowItems.forEach((item, index) => item.setItemStyle(index <= displayCount, index)));
combineLatest([this.displayRest$, this.displayCount$])
.pipe(takeUntil(this.destroy$))
.subscribe(([displayRest, displayCount]) => {
var _a;
(_a = this.overflowRest) === null || _a === void 0 ? void 0 : _a.setRestStyle(displayRest, displayRest ? displayCount : Number.MAX_SAFE_INTEGER);
});
}
ngAfterContentInit() {
var _a, _b, _c;
(_a = this.overflowItems) === null || _a === void 0 ? void 0 : _a.changes.pipe(startWith(this.overflowItems)).subscribe(this.overflowItems$);
(_b = this.overflowSuffix) === null || _b === void 0 ? void 0 : _b.suffixWidth$.subscribe(this.suffixWidth$);
(_c = this.overflowRest) === null || _c === void 0 ? void 0 : _c.restWidth$.subscribe(this.restWidth$);
this.contentInit$.next();
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
}
NzOverflowContainerComponent.decorators = [
{ type: Component, args: [{
selector: 'nz-overflow-container',
template: ` <ng-content></ng-content>
<ng-content select="[appOverflowRest]"></ng-content>
<ng-content select="[appOverflowSuffix]"></ng-content>`,
providers: [NzResizeObserver],
changeDetection: ChangeDetectionStrategy.OnPush
},] }
];
NzOverflowContainerComponent.ctorParameters = () => [
{ type: NzResizeObserver },
{ type: ElementRef },
{ type: ChangeDetectorRef }
];
NzOverflowContainerComponent.propDecorators = {
overflowItems: [{ type: ContentChildren, args: [NzOverflowItemDirective,] }],
overflowSuffix: [{ type: ContentChild, args: [NzOverflowSuffixDirective,] }],
overflowRest: [{ type: ContentChild, args: [NzOverflowRestDirective,] }]
};
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* Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport {\n  Component,\n  ChangeDetectionStrategy,\n  ContentChildren,\n  QueryList,\n  ElementRef,\n  OnInit,\n  AfterContentInit,\n  OnDestroy,\n  ContentChild,\n  ChangeDetectorRef\n} from '@angular/core';\nimport { BehaviorSubject, combineLatest, Observable, ReplaySubject, Subject } from 'rxjs';\nimport { filter, map, pairwise, startWith, switchMap, takeUntil, withLatestFrom } from 'rxjs/operators';\n\nimport { NzResizeObserver } from 'ng-zorro-antd/cdk/resize-observer';\n\nimport { NzOverflowItemDirective } from './overflow-item.directive';\nimport { NzOverflowRestDirective } from './overflow-rest.directive';\nimport { NzOverflowSuffixDirective } from './overflow-suffix.directive';\n\n@Component({\n  selector: 'nz-overflow-container',\n  template: ` <ng-content></ng-content>\n    <ng-content select=\"[appOverflowRest]\"></ng-content>\n    <ng-content select=\"[appOverflowSuffix]\"></ng-content>`,\n  providers: [NzResizeObserver],\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class NzOverflowContainerComponent implements OnInit, AfterContentInit, OnDestroy {\n  contentInit$ = new Subject<void>();\n  @ContentChildren(NzOverflowItemDirective)\n  overflowItems: QueryList<NzOverflowItemDirective> | undefined = undefined;\n  @ContentChild(NzOverflowSuffixDirective)\n  overflowSuffix: NzOverflowSuffixDirective | undefined = undefined;\n  @ContentChild(NzOverflowRestDirective) overflowRest: NzOverflowRestDirective | undefined = undefined;\n  overflowItems$ = new ReplaySubject<QueryList<NzOverflowItemDirective>>(1);\n  destroy$ = new Subject<void>();\n  containerWidth$ = this.nzResizeObserver\n    .observe(this.elementRef.nativeElement)\n    .pipe(map(([item]) => item.target.clientWidth || 0));\n  restWidth$ = new BehaviorSubject<number>(0);\n  suffixWidth$ = new BehaviorSubject<number>(0);\n  suffixFixedStart$ = new BehaviorSubject<number | null>(null);\n  displayCount$ = new BehaviorSubject<number>(Number.MAX_SAFE_INTEGER);\n  restReady$ = new BehaviorSubject<boolean>(false);\n  maxRestWith$ = this.restWidth$.pipe(\n    pairwise(),\n    map(([prevRestWidth, restWidth]) => Math.max(prevRestWidth, restWidth))\n  );\n  omittedItems$ = combineLatest([this.overflowItems$, this.displayCount$]).pipe(\n    withLatestFrom(this.contentInit$),\n    map(([[overflowItems, displayCount]]) => overflowItems.toArray().slice(displayCount + 1))\n  );\n  displayRest$ = combineLatest([this.restReady$, this.omittedItems$]).pipe(\n    map(([restReady, omittedItems]) => restReady && !!omittedItems.length)\n  );\n\n  updateDisplayCount(count: number, notReady?: boolean): void {\n    this.displayCount$.next(count);\n    if (this.overflowItems && !notReady) {\n      this.restReady$.next(count < this.overflowItems.length - 1);\n    }\n  }\n\n  constructor(\n    private nzResizeObserver: NzResizeObserver,\n    private elementRef: ElementRef,\n    private cdr: ChangeDetectorRef\n  ) {}\n\n  ngOnInit(): void {\n    const overflowItemsWidth$ = this.overflowItems$.pipe(\n      switchMap(items => combineLatest(items.map(item => item.itemWidth$)))\n    ) as Observable<number[]>;\n    this.overflowItems$.pipe(takeUntil(this.destroy$)).subscribe(overflowItems => {\n      if (!overflowItems.length) {\n        this.displayCount$.next(0);\n        this.suffixFixedStart$.next(null);\n      }\n    });\n    combineLatest([overflowItemsWidth$, this.containerWidth$, this.maxRestWith$, this.restWidth$, this.suffixWidth$])\n      .pipe(\n        filter(([, containerWidth, maxRestWith]) => !!(containerWidth && maxRestWith)),\n        takeUntil(this.destroy$)\n      )\n      .subscribe(([overflowItemsWidth, containerWidth, maxRestWith, restWidth, suffixWidth]) => {\n        let totalWidth = suffixWidth;\n        const len = overflowItemsWidth.length;\n        const lastIndex = len - 1;\n        for (let i = 0; i < len; i += 1) {\n          const currentItemWidth = overflowItemsWidth[i];\n          // Break since data not ready\n          if (currentItemWidth === undefined) {\n            this.updateDisplayCount(i - 1, true);\n            break;\n          } else {\n            // Find best match\n            totalWidth += currentItemWidth;\n\n            if (\n              // Only one means `totalWidth` is the final width\n              (lastIndex === 0 && totalWidth <= containerWidth) ||\n              // Last two width will be the final width\n              (i === lastIndex - 1 &&\n                overflowItemsWidth[lastIndex] !== undefined &&\n                totalWidth + overflowItemsWidth[lastIndex]! <= containerWidth)\n            ) {\n              // Additional check if match the end\n              this.updateDisplayCount(lastIndex);\n              this.suffixFixedStart$.next(null);\n              break;\n            } else if (totalWidth + maxRestWith > containerWidth) {\n              // Can not hold all the content to show rest\n              this.updateDisplayCount(i - 1);\n              this.suffixFixedStart$.next(totalWidth - currentItemWidth - suffixWidth + restWidth);\n              break;\n            }\n            this.cdr.detectChanges();\n          }\n        }\n        if (\n          this.overflowSuffix &&\n          overflowItemsWidth[0] !== undefined &&\n          overflowItemsWidth[0] + suffixWidth > containerWidth\n        ) {\n          this.suffixFixedStart$.next(null);\n        }\n\n        this.cdr.detectChanges();\n      });\n    combineLatest([this.suffixFixedStart$, this.displayCount$])\n      .pipe(takeUntil(this.destroy$))\n      .subscribe(([suffixFixedStart, displayCount]) => {\n        this.overflowSuffix?.setSuffixStyle(suffixFixedStart, displayCount);\n      });\n    combineLatest([this.displayCount$, this.overflowItems$])\n      .pipe(takeUntil(this.destroy$))\n      .subscribe(([displayCount, overflowItems]) =>\n        overflowItems.forEach((item, index) => item.setItemStyle(index <= displayCount, index))\n      );\n    combineLatest([this.displayRest$, this.displayCount$])\n      .pipe(takeUntil(this.destroy$))\n      .subscribe(([displayRest, displayCount]) => {\n        this.overflowRest?.setRestStyle(displayRest, displayRest ? displayCount : Number.MAX_SAFE_INTEGER);\n      });\n  }\n  ngAfterContentInit(): void {\n    this.overflowItems?.changes.pipe(startWith(this.overflowItems)).subscribe(this.overflowItems$);\n    this.overflowSuffix?.suffixWidth$.subscribe(this.suffixWidth$);\n    this.overflowRest?.restWidth$.subscribe(this.restWidth$);\n    this.contentInit$.next();\n  }\n  ngOnDestroy(): void {\n    this.destroy$.next();\n    this.destroy$.complete();\n  }\n}\n"]}