@eternalheart/ngx-file-preview
Version:
A powerful Angular file preview component library supporting multiple file formats including images, videos, PDFs, Office documents, text files and more.
132 lines • 18.5 kB
JavaScript
import { Directive, EventEmitter, Input, Output } from '@angular/core';
import { FileReaderService, PreviewService, ThemeService } from '../services';
import { PreviewUtils } from '../utils';
import { fromEvent, merge, Subject, timer } from 'rxjs';
import { filter, switchMap, takeUntil, tap } from 'rxjs/operators';
import * as i0 from "@angular/core";
import * as i1 from "../services";
export class PreviewDirective {
get themeMode() {
return this._themeMode;
}
set themeMode(value) {
this._themeMode = value;
this.themeService.setMode(this.themeMode);
if (this.themeMode === 'auto' && this.autoConfig) {
this.themeService.setAutoConfig(this.autoConfig);
}
}
get lang() {
return this._lang;
}
set lang(value) {
this._lang = value;
this.previewService.setLang(value);
}
t(key, ...args) {
return this.previewService?.getLangParser()?.t(key, ...args);
}
constructor(previewService, themeService, injector, envInjector, elementRef) {
this.previewService = previewService;
this.themeService = themeService;
this.injector = injector;
this.envInjector = envInjector;
this.elementRef = elementRef;
this.previewIndex = 0;
this.trigger = 'click'; // 默认触发方式
this._themeMode = 'auto';
this._lang = 'zh';
this.previewEvent = new EventEmitter();
this.destroy$ = new Subject();
this.isLongPressing = false;
this.previewService.init(this.injector, this.envInjector);
this.element = this.elementRef.nativeElement;
}
ngOnInit() {
this.setupTriggers();
}
setupTriggers() {
const triggers = this.trigger.split(',').map(t => t.trim());
const observables = triggers.map(trigger => {
const [eventName, param] = trigger.split(':');
switch (eventName) {
case 'click':
return fromEvent(this.element, 'click');
case 'contextmenu':
return fromEvent(this.element, 'contextmenu').pipe(tap(e => e.preventDefault()));
case 'dblclick':
return fromEvent(this.element, 'dblclick');
case 'longpress':
const duration = parseInt(param) || 800;
return fromEvent(this.element, 'mousedown').pipe(switchMap(() => timer(duration).pipe(takeUntil(fromEvent(document, 'mouseup')))));
case 'hover':
const delay = parseInt(param) || 500;
return fromEvent(this.element, 'mouseenter').pipe(switchMap(() => timer(delay).pipe(takeUntil(fromEvent(this.element, 'mouseleave')))));
case 'keydown':
return fromEvent(this.element, 'keydown').pipe(filter(e => !param || e.key === param));
default:
return fromEvent(this.element, 'click');
}
});
merge(...observables)
.pipe(takeUntil(this.destroy$))
.subscribe(() => this.preview());
}
preview() {
if (!this.fileInput)
return;
const files = PreviewUtils.normalizeFiles(this.fileInput);
if (files.length > 0) {
this.previewService.open({
files,
index: this.previewIndex,
themeMode: this.themeMode,
autoThemeConfig: this.autoConfig
});
}
else {
this.previewEvent.emit({ type: 'error', message: this.t('preview.error.noFiles') });
}
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
// 清理由 createObjectURL 创建的 URL
if (this.fileInput instanceof File) {
URL.revokeObjectURL(PreviewUtils.normalizeFile(this.fileInput).url);
}
else if (Array.isArray(this.fileInput)) {
this.fileInput.forEach(item => {
if (item instanceof File) {
URL.revokeObjectURL(PreviewUtils.normalizeFile(item).url);
}
});
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: PreviewDirective, deps: [{ token: i1.PreviewService }, { token: i1.ThemeService }, { token: i0.Injector }, { token: i0.EnvironmentInjector }, { token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "17.3.12", type: PreviewDirective, isStandalone: true, selector: "[ngxFilePreview]", inputs: { fileInput: ["ngxFilePreview", "fileInput"], previewIndex: "previewIndex", trigger: "trigger", themeMode: "themeMode", autoConfig: "autoConfig", lang: "lang" }, outputs: { previewEvent: "previewEvent" }, providers: [PreviewService, ThemeService, FileReaderService], ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: PreviewDirective, decorators: [{
type: Directive,
args: [{
selector: '[ngxFilePreview]',
standalone: true,
providers: [PreviewService, ThemeService, FileReaderService]
}]
}], ctorParameters: () => [{ type: i1.PreviewService }, { type: i1.ThemeService }, { type: i0.Injector }, { type: i0.EnvironmentInjector }, { type: i0.ElementRef }], propDecorators: { fileInput: [{
type: Input,
args: ['ngxFilePreview']
}], previewIndex: [{
type: Input
}], trigger: [{
type: Input
}], themeMode: [{
type: Input
}], autoConfig: [{
type: Input
}], lang: [{
type: Input
}], previewEvent: [{
type: Output
}] } });
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{\n  Directive,\n  ElementRef,\n  EnvironmentInjector,\n  EventEmitter,\n  Injector,\n  Input,\n  OnDestroy,\n  OnInit,\n  Output\n} from '@angular/core';\nimport { FileReaderService, PreviewService, ThemeService } from '../services';\nimport { AutoThemeConfig, PreviewEvent, PreviewFileInput, ThemeMode } from '../types';\nimport { PreviewUtils } from '../utils';\nimport { fromEvent, merge, Subject, timer } from 'rxjs';\nimport { filter, map, switchMap, takeUntil, tap } from 'rxjs/operators';\n\n@Directive({\n  selector: '[ngxFilePreview]',\n  standalone: true,\n  providers: [PreviewService, ThemeService, FileReaderService]\n})\nexport class PreviewDirective implements OnInit, OnDestroy {\n  @Input('ngxFilePreview') fileInput: PreviewFileInput;\n  @Input() previewIndex = 0;\n  @Input() trigger = 'click'; // 默认触发方式\n  private _themeMode: ThemeMode = 'auto';\n  @Input()\n  get themeMode(): ThemeMode {\n    return this._themeMode;\n  }\n\n  set themeMode(value: ThemeMode) {\n    this._themeMode = value;\n    this.themeService.setMode(this.themeMode);\n    if (this.themeMode === 'auto' && this.autoConfig) {\n      this.themeService.setAutoConfig(this.autoConfig);\n    }\n  }\n  @Input() autoConfig?: AutoThemeConfig;\n  private _lang:string = 'zh';\n  @Input()\n  get lang(): string {\n    return this._lang;\n  }\n\n  set lang(value: string) {\n    this._lang = value;\n    this.previewService.setLang(value);\n  }\n  @Output() previewEvent = new EventEmitter<PreviewEvent>();\n\n  t(key: string, ...args: (string | number)[]) {\n    return this.previewService?.getLangParser()?.t(key, ...args);\n  }\n\n  private destroy$ = new Subject<void>();\n  private element: HTMLElement;\n  private longPressTimer: any;\n  private isLongPressing = false;\n\n  constructor(\n    private previewService: PreviewService,\n    private themeService: ThemeService,\n    private injector: Injector,\n    private envInjector: EnvironmentInjector,\n    private elementRef: ElementRef\n  ) {\n    this.previewService.init(this.injector, this.envInjector);\n    this.element = this.elementRef.nativeElement;\n  }\n\n  ngOnInit() {\n    this.setupTriggers();\n  }\n\n  private setupTriggers() {\n    const triggers = this.trigger.split(',').map(t => t.trim());\n    const observables = triggers.map(trigger => {\n      const [eventName, param] = trigger.split(':');\n      \n      switch(eventName) {\n        case 'click':\n          return fromEvent(this.element, 'click');\n        case 'contextmenu':\n          return fromEvent(this.element, 'contextmenu').pipe(\n            tap(e => e.preventDefault())\n          );\n        case 'dblclick':\n          return fromEvent(this.element, 'dblclick');\n        case 'longpress':\n          const duration = parseInt(param) || 800;\n          return fromEvent<MouseEvent>(this.element, 'mousedown').pipe(\n            switchMap(() => timer(duration).pipe(\n              takeUntil(fromEvent(document, 'mouseup'))\n            ))\n          );\n        case 'hover':\n          const delay = parseInt(param) || 500;\n          return fromEvent(this.element, 'mouseenter').pipe(\n            switchMap(() => timer(delay).pipe(\n              takeUntil(fromEvent(this.element, 'mouseleave'))\n            ))\n          );\n        case 'keydown':\n          return fromEvent<KeyboardEvent>(this.element, 'keydown').pipe(\n            filter(e => !param || e.key === param)\n          );\n        default:\n          return fromEvent(this.element, 'click');\n      }\n    });\n\n    merge(...observables)\n      .pipe(takeUntil(this.destroy$))\n      .subscribe(() => this.preview());\n  }\n\n  private preview() {\n    if (!this.fileInput) return;\n    const files = PreviewUtils.normalizeFiles(this.fileInput);\n    if (files.length > 0) {\n      this.previewService.open({\n        files,\n        index: this.previewIndex,\n        themeMode: this.themeMode,\n        autoThemeConfig: this.autoConfig\n      });\n    } else {\n      this.previewEvent.emit({type: 'error', message: this.t('preview.error.noFiles')})\n    }\n  }\n\n  ngOnDestroy() {\n    this.destroy$.next();\n    this.destroy$.complete();\n    // 清理由 createObjectURL 创建的 URL\n    if (this.fileInput instanceof File) {\n      URL.revokeObjectURL(PreviewUtils.normalizeFile(this.fileInput).url);\n    } else if (Array.isArray(this.fileInput)) {\n      this.fileInput.forEach(item => {\n        if (item instanceof File) {\n          URL.revokeObjectURL(PreviewUtils.normalizeFile(item).url);\n        }\n      });\n    }\n  }\n}\n"]}