ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
185 lines • 24 kB
JavaScript
import { __decorate } from "tslib";
import { DOCUMENT } from '@angular/common';
import { Directive, Inject, Input, Optional, booleanAttribute } from '@angular/core';
import { Subject, fromEvent } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { WithConfig } from 'ng-zorro-antd/core/config';
import { NZ_DEFAULT_SCALE_STEP } from './image-preview.component';
import * as i0 from "@angular/core";
import * as i1 from "ng-zorro-antd/core/config";
import * as i2 from "./image.service";
import * as i3 from "./image-group.component";
import * as i4 from "@angular/cdk/bidi";
const NZ_CONFIG_MODULE_NAME = 'image';
export class NzImageDirective {
get previewable() {
return !this.nzDisablePreview && this.status !== 'error';
}
constructor(document, nzConfigService, elementRef, nzImageService, cdr, parentGroup, directionality) {
this.document = document;
this.nzConfigService = nzConfigService;
this.elementRef = elementRef;
this.nzImageService = nzImageService;
this.cdr = cdr;
this.parentGroup = parentGroup;
this.directionality = directionality;
this._nzModuleName = NZ_CONFIG_MODULE_NAME;
this.nzSrc = '';
this.nzSrcset = '';
this.nzDisablePreview = false;
this.nzFallback = null;
this.nzPlaceholder = null;
this.nzScaleStep = null;
this.status = 'normal';
this.backLoadDestroy$ = new Subject();
this.destroy$ = new Subject();
}
ngOnInit() {
this.backLoad();
if (this.parentGroup) {
this.parentGroup.addImage(this);
}
if (this.directionality) {
this.directionality.change?.pipe(takeUntil(this.destroy$)).subscribe((direction) => {
this.dir = direction;
this.cdr.detectChanges();
});
this.dir = this.directionality.value;
}
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
onPreview() {
if (!this.previewable) {
return;
}
if (this.parentGroup) {
// preview inside image group
const previewAbleImages = this.parentGroup.images.filter(e => e.previewable);
const previewImages = previewAbleImages.map(e => ({ src: e.nzSrc, srcset: e.nzSrcset }));
const previewIndex = previewAbleImages.findIndex(el => this === el);
const scaleStepMap = new Map();
previewAbleImages.forEach(imageDirective => {
scaleStepMap.set(imageDirective.nzSrc ?? imageDirective.nzSrcset, imageDirective.nzScaleStep ?? this.parentGroup.nzScaleStep ?? this.nzScaleStep ?? NZ_DEFAULT_SCALE_STEP);
});
const previewRef = this.nzImageService.preview(previewImages, {
nzDirection: this.dir
}, scaleStepMap);
previewRef.switchTo(previewIndex);
}
else {
// preview not inside image group
const previewImages = [{ src: this.nzSrc, srcset: this.nzSrcset }];
this.nzImageService.preview(previewImages, {
nzDirection: this.dir,
nzScaleStep: this.nzScaleStep ?? NZ_DEFAULT_SCALE_STEP
});
}
}
getElement() {
return this.elementRef;
}
ngOnChanges(changes) {
const { nzSrc } = changes;
if (nzSrc) {
this.getElement().nativeElement.src = nzSrc.currentValue;
this.backLoad();
}
}
/**
* use internal Image object handle fallback & placeholder
*
* @private
*/
backLoad() {
this.backLoadImage = this.document.createElement('img');
this.backLoadImage.src = this.nzSrc;
this.backLoadImage.srcset = this.nzSrcset;
this.status = 'loading';
// unsubscribe last backLoad
this.backLoadDestroy$.next();
this.backLoadDestroy$.complete();
this.backLoadDestroy$ = new Subject();
if (this.backLoadImage.complete) {
this.status = 'normal';
this.getElement().nativeElement.src = this.nzSrc;
this.getElement().nativeElement.srcset = this.nzSrcset;
}
else {
if (this.nzPlaceholder) {
this.getElement().nativeElement.src = this.nzPlaceholder;
this.getElement().nativeElement.srcset = '';
}
else {
this.getElement().nativeElement.src = this.nzSrc;
this.getElement().nativeElement.srcset = this.nzSrcset;
}
// The `nz-image` directive can be destroyed before the `load` or `error` event is dispatched,
// so there's no sense to keep capturing `this`.
fromEvent(this.backLoadImage, 'load')
.pipe(takeUntil(this.backLoadDestroy$), takeUntil(this.destroy$))
.subscribe(() => {
this.status = 'normal';
this.getElement().nativeElement.src = this.nzSrc;
this.getElement().nativeElement.srcset = this.nzSrcset;
});
fromEvent(this.backLoadImage, 'error')
.pipe(takeUntil(this.backLoadDestroy$), takeUntil(this.destroy$))
.subscribe(() => {
this.status = 'error';
if (this.nzFallback) {
this.getElement().nativeElement.src = this.nzFallback;
this.getElement().nativeElement.srcset = '';
}
});
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.1", ngImport: i0, type: NzImageDirective, deps: [{ token: DOCUMENT }, { token: i1.NzConfigService }, { token: i0.ElementRef }, { token: i2.NzImageService }, { token: i0.ChangeDetectorRef }, { token: i3.NzImageGroupComponent, optional: true }, { token: i4.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "16.1.0", version: "18.0.1", type: NzImageDirective, isStandalone: true, selector: "img[nz-image]", inputs: { nzSrc: "nzSrc", nzSrcset: "nzSrcset", nzDisablePreview: ["nzDisablePreview", "nzDisablePreview", booleanAttribute], nzFallback: "nzFallback", nzPlaceholder: "nzPlaceholder", nzScaleStep: "nzScaleStep" }, host: { listeners: { "click": "onPreview()" } }, exportAs: ["nzImage"], usesOnChanges: true, ngImport: i0 }); }
}
__decorate([
WithConfig()
], NzImageDirective.prototype, "nzDisablePreview", void 0);
__decorate([
WithConfig()
], NzImageDirective.prototype, "nzFallback", void 0);
__decorate([
WithConfig()
], NzImageDirective.prototype, "nzPlaceholder", void 0);
__decorate([
WithConfig()
], NzImageDirective.prototype, "nzScaleStep", void 0);
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.1", ngImport: i0, type: NzImageDirective, decorators: [{
type: Directive,
args: [{
selector: 'img[nz-image]',
exportAs: 'nzImage',
host: {
'(click)': 'onPreview()'
},
standalone: true
}]
}], ctorParameters: () => [{ type: undefined, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }, { type: i1.NzConfigService }, { type: i0.ElementRef }, { type: i2.NzImageService }, { type: i0.ChangeDetectorRef }, { type: i3.NzImageGroupComponent, decorators: [{
type: Optional
}] }, { type: i4.Directionality, decorators: [{
type: Optional
}] }], propDecorators: { nzSrc: [{
type: Input
}], nzSrcset: [{
type: Input
}], nzDisablePreview: [{
type: Input,
args: [{ transform: booleanAttribute }]
}], nzFallback: [{
type: Input
}], nzPlaceholder: [{
type: Input
}], nzScaleStep: [{
type: Input
}] } });
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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 { Direction, Directionality } from '@angular/cdk/bidi';\nimport { DOCUMENT } from '@angular/common';\nimport {\n  ChangeDetectorRef,\n  Directive,\n  ElementRef,\n  Inject,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  Optional,\n  SimpleChanges,\n  booleanAttribute\n} from '@angular/core';\nimport { Subject, fromEvent } from 'rxjs';\nimport { takeUntil } from 'rxjs/operators';\n\nimport { NzConfigKey, NzConfigService, WithConfig } from 'ng-zorro-antd/core/config';\nimport { NzSafeAny } from 'ng-zorro-antd/core/types';\n\nimport { NzImageGroupComponent } from './image-group.component';\nimport { NZ_DEFAULT_SCALE_STEP } from './image-preview.component';\nimport { NzImageService } from './image.service';\n\nconst NZ_CONFIG_MODULE_NAME: NzConfigKey = 'image';\n\nexport type ImageStatusType = 'error' | 'loading' | 'normal';\nexport type NzImageUrl = string;\nexport type NzImageScaleStep = number;\n\n@Directive({\n  selector: 'img[nz-image]',\n  exportAs: 'nzImage',\n  host: {\n    '(click)': 'onPreview()'\n  },\n  standalone: true\n})\nexport class NzImageDirective implements OnInit, OnChanges, OnDestroy {\n  readonly _nzModuleName: NzConfigKey = NZ_CONFIG_MODULE_NAME;\n\n  @Input() nzSrc = '';\n  @Input() nzSrcset = '';\n  @Input({ transform: booleanAttribute }) @WithConfig() nzDisablePreview: boolean = false;\n  @Input() @WithConfig() nzFallback: string | null = null;\n  @Input() @WithConfig() nzPlaceholder: string | null = null;\n  @Input() @WithConfig() nzScaleStep: number | null = null;\n\n  dir?: Direction;\n  backLoadImage!: HTMLImageElement;\n  status: ImageStatusType = 'normal';\n  private backLoadDestroy$: Subject<void> = new Subject();\n  private destroy$: Subject<void> = new Subject();\n\n  get previewable(): boolean {\n    return !this.nzDisablePreview && this.status !== 'error';\n  }\n\n  constructor(\n    @Inject(DOCUMENT) private document: NzSafeAny,\n    public nzConfigService: NzConfigService,\n    private elementRef: ElementRef,\n    private nzImageService: NzImageService,\n    protected cdr: ChangeDetectorRef,\n    @Optional() private parentGroup: NzImageGroupComponent,\n    @Optional() private directionality: Directionality\n  ) {}\n\n  ngOnInit(): void {\n    this.backLoad();\n    if (this.parentGroup) {\n      this.parentGroup.addImage(this);\n    }\n    if (this.directionality) {\n      this.directionality.change?.pipe(takeUntil(this.destroy$)).subscribe((direction: Direction) => {\n        this.dir = direction;\n        this.cdr.detectChanges();\n      });\n      this.dir = this.directionality.value;\n    }\n  }\n\n  ngOnDestroy(): void {\n    this.destroy$.next();\n    this.destroy$.complete();\n  }\n\n  onPreview(): void {\n    if (!this.previewable) {\n      return;\n    }\n\n    if (this.parentGroup) {\n      // preview inside image group\n      const previewAbleImages = this.parentGroup.images.filter(e => e.previewable);\n      const previewImages = previewAbleImages.map(e => ({ src: e.nzSrc, srcset: e.nzSrcset }));\n      const previewIndex = previewAbleImages.findIndex(el => this === el);\n      const scaleStepMap = new Map<NzImageUrl, NzImageScaleStep>();\n      previewAbleImages.forEach(imageDirective => {\n        scaleStepMap.set(\n          imageDirective.nzSrc ?? imageDirective.nzSrcset,\n          imageDirective.nzScaleStep ?? this.parentGroup.nzScaleStep ?? this.nzScaleStep ?? NZ_DEFAULT_SCALE_STEP\n        );\n      });\n      const previewRef = this.nzImageService.preview(\n        previewImages,\n        {\n          nzDirection: this.dir\n        },\n        scaleStepMap\n      );\n      previewRef.switchTo(previewIndex);\n    } else {\n      // preview not inside image group\n      const previewImages = [{ src: this.nzSrc, srcset: this.nzSrcset }];\n      this.nzImageService.preview(previewImages, {\n        nzDirection: this.dir,\n        nzScaleStep: this.nzScaleStep ?? NZ_DEFAULT_SCALE_STEP\n      });\n    }\n  }\n\n  getElement(): ElementRef<HTMLImageElement> {\n    return this.elementRef;\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    const { nzSrc } = changes;\n    if (nzSrc) {\n      this.getElement().nativeElement.src = nzSrc.currentValue;\n      this.backLoad();\n    }\n  }\n\n  /**\n   * use internal Image object handle fallback & placeholder\n   *\n   * @private\n   */\n  private backLoad(): void {\n    this.backLoadImage = this.document.createElement('img');\n    this.backLoadImage.src = this.nzSrc;\n    this.backLoadImage.srcset = this.nzSrcset;\n    this.status = 'loading';\n\n    // unsubscribe last backLoad\n    this.backLoadDestroy$.next();\n    this.backLoadDestroy$.complete();\n    this.backLoadDestroy$ = new Subject();\n    if (this.backLoadImage.complete) {\n      this.status = 'normal';\n      this.getElement().nativeElement.src = this.nzSrc;\n      this.getElement().nativeElement.srcset = this.nzSrcset;\n    } else {\n      if (this.nzPlaceholder) {\n        this.getElement().nativeElement.src = this.nzPlaceholder;\n        this.getElement().nativeElement.srcset = '';\n      } else {\n        this.getElement().nativeElement.src = this.nzSrc;\n        this.getElement().nativeElement.srcset = this.nzSrcset;\n      }\n\n      // The `nz-image` directive can be destroyed before the `load` or `error` event is dispatched,\n      // so there's no sense to keep capturing `this`.\n      fromEvent(this.backLoadImage, 'load')\n        .pipe(takeUntil(this.backLoadDestroy$), takeUntil(this.destroy$))\n        .subscribe(() => {\n          this.status = 'normal';\n          this.getElement().nativeElement.src = this.nzSrc;\n          this.getElement().nativeElement.srcset = this.nzSrcset;\n        });\n\n      fromEvent(this.backLoadImage, 'error')\n        .pipe(takeUntil(this.backLoadDestroy$), takeUntil(this.destroy$))\n        .subscribe(() => {\n          this.status = 'error';\n          if (this.nzFallback) {\n            this.getElement().nativeElement.src = this.nzFallback;\n            this.getElement().nativeElement.srcset = '';\n          }\n        });\n    }\n  }\n}\n"]}