ngx-doc-viewer2
Version:
Angular document viewer.
217 lines • 30 kB
JavaScript
import { __awaiter } from "tslib";
import { Component, Input, NgZone, Output, ViewChildren } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';
import { take } from 'rxjs/operators';
import { timer } from 'rxjs';
import { EventEmitter } from '@angular/core';
export class NgxDocViewerComponent {
constructor(domSanitizer, ngZone) {
this.domSanitizer = domSanitizer;
this.ngZone = ngZone;
this.loaded = new EventEmitter();
this.url = '';
this.queryParams = '';
this.viewerUrl = '';
this.googleCheckInterval = 3000;
this.disableContent = 'none';
this.googleCheckContentLoaded = true;
this.fullUrl = null;
this.externalViewer = false;
this.docHtml = '';
this.configuredViewer = 'google';
this.checkIFrameSubscription = null;
}
ngOnDestroy() {
if (this.checkIFrameSubscription) {
this.checkIFrameSubscription.unsubscribe();
}
}
ngOnChanges(changes) {
return __awaiter(this, void 0, void 0, function* () {
if (changes && changes.viewer && (changes.viewer.isFirstChange || changes.viewer.currentValue !== changes.viewer.previousValue)) {
if (this.viewer !== 'google' && this.viewer !== 'office' &&
this.viewer !== 'mammoth' && this.viewer !== 'pdf' && this.viewer !== 'url') {
console.error(`Unsupported viewer: '${this.viewer}'. Supported viewers: google, office, mammoth and pdf`);
}
if (this.viewer === 'mammoth') {
if (mammoth === null) {
console.error('please install mammoth when using local viewer');
}
}
this.configuredViewer = this.viewer;
}
if (this.disableContent !== 'none' && this.viewer !== 'google') {
}
if ((changes.url && changes.url.currentValue !== changes.url.previousValue) ||
changes.viewer && changes.viewer.currentValue !== changes.viewer.previousValue ||
changes.viewerUrl && changes.viewerUrl.currentValue !== changes.viewerUrl.previousValue) {
if (!changes.viewerUrl) {
this.viewerUrl = null;
}
switch (this.configuredViewer) {
case 'google':
this.viewerUrl = `https://docs.google.com/gview?url=%URL%&embedded=true`;
break;
case 'office': {
this.viewerUrl = `https://view.officeapps.live.com/op/embed.aspx?src=%URL%`;
break;
}
case 'pdf': {
this.viewerUrl = null;
break;
}
}
this.docHtml = '';
this.externalViewer = this.configuredViewer === 'google' || this.configuredViewer === 'office' ||
this.configuredViewer === 'url';
if (this.checkIFrameSubscription) {
this.checkIFrameSubscription.unsubscribe();
}
if (!this.url) {
this.fullUrl = null;
}
else if (this.configuredViewer === 'office' || this.configuredViewer === 'google'
|| this.configuredViewer === 'pdf' || this.configuredViewer === 'url') {
const u = this.url.indexOf('/') ? encodeURIComponent(this.url) : this.url;
let url = this.viewerUrl ? this.viewerUrl.replace('%URL%', u) : this.url;
if (!!this.queryParams && this.configuredViewer !== 'pdf') {
const start = this.queryParams.startsWith('&') ? '' : '&';
url = `${url}${start}${this.queryParams}`;
}
this.fullUrl = this.domSanitizer.bypassSecurityTrustResourceUrl(url);
// see:
// https://stackoverflow.com/questions/40414039/google-docs-viewer-returning-204-responses-no-longer-working-alternatives
// hack to reload iframe if it's not loaded.
// would maybe be better to use view.officeapps.live.com but seems not to work with sas token.
if (this.configuredViewer === 'google' && this.googleCheckContentLoaded) {
this.ngZone.runOutsideAngular(() => {
console.log('NGDOC:>>outside');
// if it's not loaded after the googleIntervalCheck, then open load again.
this.checkIFrameSubscription = timer(500, this.googleCheckInterval)
.pipe(take(Math.round(this.googleCheckInterval === 0 ? 0 : 20000 / this.googleCheckInterval)))
.subscribe(() => {
var _a, _b;
console.log('NGDOC:>>checking again');
const iframe = (_b = (_a = this.iframes) === null || _a === void 0 ? void 0 : _a.first) === null || _b === void 0 ? void 0 : _b.nativeElement;
this.reloadIFrame(iframe);
});
});
}
}
else if (this.configuredViewer === 'mammoth') {
if (!mammoth) {
console.error('Please install mammoth and make sure mammoth.browser.min.js is loaded.');
}
this.docHtml = yield this.getDocxToHtml(this.url);
}
}
});
}
iframeLoaded() {
var _a, _b;
this.loaded.emit(null);
if (this.checkIFrameSubscription) {
const iframe = (_b = (_a = this.iframes) === null || _a === void 0 ? void 0 : _a.first) === null || _b === void 0 ? void 0 : _b.nativeElement;
if (iframe) {
this.loaded.emit(true);
this.checkIFrameSubscription.unsubscribe();
}
}
}
reloadIFrame(iframe) {
if (iframe) {
let src = iframe.src;
iframe.src = iframe.src;
setTimeout(() => {
iframe.src = src;
}, 100);
}
}
getDocxToHtml(url) {
return __awaiter(this, void 0, void 0, function* () {
const arrayBuffer = yield this.fileToArray(url);
const resultObject = yield mammoth.convertToHtml({ arrayBuffer });
return resultObject.value;
});
}
fileToArray(url) {
return new Promise((resolve, reject) => {
try {
const request = new XMLHttpRequest();
request.open('GET', url, true);
request.responseType = 'blob';
request.onload = () => {
const reader = new FileReader();
reader.readAsArrayBuffer(request.response);
reader.onloadend = (e) => {
resolve(reader.result);
};
};
request.send();
}
catch (_a) {
reject(`error while retrieving file ${url}.`);
}
});
}
}
NgxDocViewerComponent.decorators = [
{ type: Component, args: [{
// eslint-disable-next-line @angular-eslint/component-selector
selector: 'ngx-doc-viewer',
template: "<ng-container *ngIf=\"!externalViewer\">\r\n <div *ngIf=\"configuredViewer !== 'pdf'\" [innerHtml]=\"docHtml\"></div>\r\n <object *ngIf=\"fullUrl && configuredViewer === 'pdf'\" [data]=\"fullUrl\"\r\n type=\"application/pdf\" width=\"100%\" height=\"100%\">\r\n <p>Your browser does not support PDFs.\r\n <a [href]=\"fullUrl\">Download the PDF</a>.</p>\r\n </object>\r\n</ng-container>\r\n<ng-container *ngIf=\"externalViewer\">\r\n <iframe (load)=\"iframeLoaded()\" *ngIf=\"fullUrl && disableContent === 'none'\" #iframe id=\"iframe\" frameBorder=\"0\" [src]=\"fullUrl\"></iframe>\r\n <div class=\"container\" *ngIf=\"disableContent !== 'none'\">\r\n <div [class.overlay-full]=\"disableContent === 'all'\"\r\n [class.overlay-popout-google]=\"configuredViewer ==='google' && (disableContent === 'popout' || disableContent === 'popout-hide')\"\r\n [class.overlay-popout-office]=\"configuredViewer ==='office' && (disableContent === 'popout' || disableContent === 'popout-hide')\"\r\n [style.background-color]=\"disableContent === 'popout-hide' ? '#fff': 'transparent'\">\r\n </div>\r\n <iframe (load)=\"iframeLoaded()\" *ngIf=\"fullUrl\" #iframe id=\"iframe\" frameBorder=\"0\" [src]=\"fullUrl\"></iframe>\r\n </div>\r\n</ng-container>",
styles: [`:host {
display: block;
}
.container {
width: 100%;
height: 100%;
position: relative;
}
.overlay-popout-google {
width: 40px;
height: 40px;
right: 26px;
top: 11.5px;
position: absolute;
z-index: 1000;
}
.overlay-popout-office {
width: 100px;
height: 20px;
right: 0;
bottom: 0;
position: absolute;
z-index: 1000;
}
.overlay-full {
width: 100%;
height: 100%;
right: 0;
top: 0;
position: absolute;
z-index: 1000;
}
iframe {
width: 100%;
height: 100%;
}
`]
},] }
];
NgxDocViewerComponent.ctorParameters = () => [
{ type: DomSanitizer },
{ type: NgZone }
];
NgxDocViewerComponent.propDecorators = {
loaded: [{ type: Output }],
url: [{ type: Input }],
queryParams: [{ type: Input }],
viewerUrl: [{ type: Input }],
googleCheckInterval: [{ type: Input }],
disableContent: [{ type: Input }],
googleCheckContentLoaded: [{ type: Input }],
viewer: [{ type: Input }],
iframes: [{ type: ViewChildren, args: ['iframe',] }]
};
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{ Component, Input, NgZone, OnDestroy, OnChanges, SimpleChanges, Output, ViewChildren, QueryList, ElementRef } from '@angular/core';\r\nimport { DomSanitizer, SafeResourceUrl } from '@angular/platform-browser';\r\nimport { take } from 'rxjs/operators';\r\nimport { Subscription, interval, timer } from 'rxjs';\r\nimport { EventEmitter } from '@angular/core';\r\n\r\n// eslint-disable-next-line no-var\r\ndeclare var mammoth;\r\n\r\n// eslint-disable-next-line @typescript-eslint/naming-convention\r\nexport type viewerType = 'google' | 'office' | 'mammoth' | 'pdf' | 'url';\r\n@Component({\r\n    // eslint-disable-next-line @angular-eslint/component-selector\r\n    selector: 'ngx-doc-viewer',\r\n    templateUrl: 'document-viewer.component.html',\r\n    styles: [`:host {\r\n        display: block;\r\n    }\r\n    .container {\r\n        width: 100%;\r\n        height: 100%;\r\n        position: relative;\r\n    }\r\n    .overlay-popout-google {\r\n        width: 40px;\r\n        height: 40px;\r\n        right: 26px;\r\n        top: 11.5px;\r\n        position: absolute;\r\n        z-index: 1000;\r\n    }\r\n    .overlay-popout-office {\r\n        width: 100px;\r\n        height: 20px;\r\n        right: 0;\r\n        bottom: 0;\r\n        position: absolute;\r\n        z-index: 1000;\r\n    }\r\n    .overlay-full {\r\n        width: 100%;\r\n        height: 100%;\r\n        right: 0;\r\n        top: 0;\r\n        position: absolute;\r\n        z-index: 1000;\r\n    }\r\n    iframe {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n    `]\r\n})\r\nexport class NgxDocViewerComponent implements OnChanges, OnDestroy {\r\n    @Output() loaded: EventEmitter<any> = new EventEmitter();\r\n    @Input() url = '';\r\n    @Input() queryParams = '';\r\n    @Input() viewerUrl = '';\r\n    @Input() googleCheckInterval = 3000;\r\n    @Input() disableContent: 'none' | 'all' | 'popout' | 'popout-hide' = 'none';\r\n    @Input() googleCheckContentLoaded = true;\r\n    @Input() viewer: viewerType;\r\n    @ViewChildren('iframe') iframes: QueryList<ElementRef>;\r\n\r\n    public fullUrl: SafeResourceUrl = null;\r\n    public externalViewer = false;\r\n    public docHtml = '';\r\n    public configuredViewer: viewerType = 'google';\r\n    private checkIFrameSubscription: Subscription = null;\r\n\r\n    constructor(private domSanitizer: DomSanitizer, private ngZone: NgZone) { }\r\n\r\n    ngOnDestroy(): void {\r\n        if (this.checkIFrameSubscription) {\r\n            this.checkIFrameSubscription.unsubscribe();\r\n        }\r\n    }\r\n\r\n    async ngOnChanges(changes: SimpleChanges): Promise<void> {\r\n        if (changes && changes.viewer && (changes.viewer.isFirstChange || changes.viewer.currentValue !== changes.viewer.previousValue)) {\r\n            if (this.viewer !== 'google' && this.viewer !== 'office' &&\r\n                this.viewer !== 'mammoth' && this.viewer !== 'pdf' && this.viewer !== 'url') {\r\n                console.error(`Unsupported viewer: '${this.viewer}'. Supported viewers: google, office, mammoth and pdf`);\r\n            }\r\n            if (this.viewer === 'mammoth') {\r\n                if (mammoth === null) {\r\n                    console.error('please install mammoth when using local viewer');\r\n                }\r\n            }\r\n            this.configuredViewer = this.viewer;\r\n        }\r\n        if (this.disableContent !== 'none' && this.viewer !== 'google') {\r\n        }\r\n        if ((changes.url && changes.url.currentValue !== changes.url.previousValue) ||\r\n            changes.viewer && changes.viewer.currentValue !== changes.viewer.previousValue ||\r\n            changes.viewerUrl && changes.viewerUrl.currentValue !== changes.viewerUrl.previousValue) {\r\n            if (!changes.viewerUrl) {\r\n                this.viewerUrl = null;\r\n            }\r\n            switch (this.configuredViewer) {\r\n                case 'google':\r\n                    this.viewerUrl = `https://docs.google.com/gview?url=%URL%&embedded=true`;\r\n                    break;\r\n                case 'office': {\r\n                    this.viewerUrl = `https://view.officeapps.live.com/op/embed.aspx?src=%URL%`;\r\n                    break;\r\n                }\r\n                case 'pdf': {\r\n                    this.viewerUrl = null;\r\n                    break;\r\n                }\r\n            }\r\n            this.docHtml = '';\r\n            this.externalViewer = this.configuredViewer === 'google' || this.configuredViewer === 'office' ||\r\n                this.configuredViewer === 'url';\r\n            if (this.checkIFrameSubscription) {\r\n                this.checkIFrameSubscription.unsubscribe();\r\n            }\r\n            if (!this.url) {\r\n                this.fullUrl = null;\r\n            } else if (this.configuredViewer === 'office' || this.configuredViewer === 'google'\r\n                || this.configuredViewer === 'pdf' || this.configuredViewer === 'url') {\r\n                const u = this.url.indexOf('/') ? encodeURIComponent(this.url) : this.url;\r\n                let url = this.viewerUrl ? this.viewerUrl.replace('%URL%', u) : this.url;\r\n                if (!!this.queryParams && this.configuredViewer !== 'pdf') {\r\n                    const start = this.queryParams.startsWith('&') ? '' : '&';\r\n                    url = `${url}${start}${this.queryParams}`;\r\n                }\r\n                this.fullUrl = this.domSanitizer.bypassSecurityTrustResourceUrl(url);\r\n                // see:\r\n                // https://stackoverflow.com/questions/40414039/google-docs-viewer-returning-204-responses-no-longer-working-alternatives\r\n                // hack to reload iframe if it's not loaded.\r\n                // would maybe be better to use view.officeapps.live.com but seems not to work with sas token.\r\n                if (this.configuredViewer === 'google' && this.googleCheckContentLoaded) {\r\n                    this.ngZone.runOutsideAngular(() => {\r\n                      console.log('NGDOC:>>outside');\r\n                        // if it's not loaded after the googleIntervalCheck, then open load again.\r\n                        this.checkIFrameSubscription = timer(500, this.googleCheckInterval)\r\n                            .pipe(\r\n                                take(Math.round(this.googleCheckInterval === 0 ? 0 : 20000 / this.googleCheckInterval)))\r\n                            .subscribe(() => {\r\n                              console.log('NGDOC:>>checking again');\r\n                                const iframe = this.iframes?.first?.nativeElement;\r\n                                this.reloadIFrame(iframe);\r\n                            });\r\n                    });\r\n                }\r\n            } else if (this.configuredViewer === 'mammoth') {\r\n                if (!mammoth) {\r\n                    console.error('Please install mammoth and make sure mammoth.browser.min.js is loaded.');\r\n                }\r\n                this.docHtml = await this.getDocxToHtml(this.url);\r\n            }\r\n        }\r\n    }\r\n\r\n    iframeLoaded() {\r\n        this.loaded.emit(null);\r\n        if (this.checkIFrameSubscription) {\r\n          const iframe = this.iframes?.first?.nativeElement;\r\n          if (iframe) {\r\n            this.loaded.emit(true);\r\n            this.checkIFrameSubscription.unsubscribe();\r\n          }\r\n        }\r\n    }\r\n\r\n    reloadIFrame(iframe: HTMLIFrameElement) {\r\n        if (iframe) {\r\n            let src = iframe.src\r\n            iframe.src = iframe.src;\r\n            setTimeout(() => {\r\n              iframe.src = src\r\n            }, 100)\r\n        }\r\n    }\r\n\r\n    private async getDocxToHtml(url: string) {\r\n        const arrayBuffer = await this.fileToArray(url);\r\n        const resultObject = await mammoth.convertToHtml({ arrayBuffer });\r\n        return resultObject.value;\r\n    }\r\n\r\n    private fileToArray(url: string): Promise<ArrayBuffer> {\r\n        return new Promise<ArrayBuffer>((resolve, reject) => {\r\n            try {\r\n                const request = new XMLHttpRequest();\r\n                request.open('GET', url, true);\r\n                request.responseType = 'blob';\r\n                request.onload = () => {\r\n                    const reader = new FileReader();\r\n                    reader.readAsArrayBuffer(request.response);\r\n                    reader.onloadend = (e) => {\r\n                        resolve(reader.result as ArrayBuffer);\r\n                    };\r\n                };\r\n                request.send();\r\n            } catch {\r\n                reject(`error while retrieving file ${url}.`);\r\n            }\r\n        });\r\n    }\r\n}\r\n"]}