From 9b7bc16b3e85ec458763300757c8f9434c432431 Mon Sep 17 00:00:00 2001
From: jonaswinkler <17569239+jonaswinkler@users.noreply.github.com>
Date: Wed, 10 Mar 2021 22:38:33 +0100
Subject: [PATCH] keep the ng2-pdf-viewer; this might come in handy for
 splitting documents at specific pages #706

---
 src-ui/package.json                             |  1 +
 src-ui/src/app/app.module.ts                    |  2 ++
 .../document-detail.component.html              | 17 ++++++++++++++++-
 .../document-detail.component.ts                | 12 ++++++++++++
 .../document-card-large.component.html          |  2 +-
 .../document-card-small.component.html          |  2 +-
 .../manage/settings/settings.component.html     | 11 +++++++++++
 .../manage/settings/settings.component.ts       |  2 ++
 src-ui/src/app/services/settings.service.ts     |  2 ++
 9 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/src-ui/package.json b/src-ui/package.json
index b005d843a..595228501 100644
--- a/src-ui/package.json
+++ b/src-ui/package.json
@@ -25,6 +25,7 @@
     "bootstrap": "^4.5.0",
     "file-saver": "^2.0.5",
     "ng-bootstrap": "^1.6.3",
+    "ng2-pdf-viewer": "^6.3.2",
     "ngx-color": "^6.2.0",
     "ngx-cookie-service": "^10.1.1",
     "ngx-file-drop": "^10.0.0",
diff --git a/src-ui/src/app/app.module.ts b/src-ui/src/app/app.module.ts
index f12f08b6d..ebf24a327 100644
--- a/src-ui/src/app/app.module.ts
+++ b/src-ui/src/app/app.module.ts
@@ -47,6 +47,7 @@ import { SavedViewWidgetComponent } from './components/dashboard/widgets/saved-v
 import { StatisticsWidgetComponent } from './components/dashboard/widgets/statistics-widget/statistics-widget.component';
 import { UploadFileWidgetComponent } from './components/dashboard/widgets/upload-file-widget/upload-file-widget.component';
 import { WidgetFrameComponent } from './components/dashboard/widgets/widget-frame/widget-frame.component';
+import { PdfViewerModule } from 'ng2-pdf-viewer';
 import { WelcomeWidgetComponent } from './components/dashboard/widgets/welcome-widget/welcome-widget.component';
 import { YesNoPipe } from './pipes/yes-no.pipe';
 import { FileSizePipe } from './pipes/file-size.pipe';
@@ -145,6 +146,7 @@ registerLocaleData(localeRu)
     ReactiveFormsModule,
     NgxFileDropModule,
     InfiniteScrollModule,
+    PdfViewerModule,
     NgSelectModule,
     ColorSliderModule
   ],
diff --git a/src-ui/src/app/components/document-detail/document-detail.component.html b/src-ui/src/app/components/document-detail/document-detail.component.html
index 79215c51c..f9b87aee3 100644
--- a/src-ui/src/app/components/document-detail/document-detail.component.html
+++ b/src-ui/src/app/components/document-detail/document-detail.component.html
@@ -1,4 +1,14 @@
 <app-page-header [(title)]="title">
+    <div class="input-group input-group-sm mr-5 d-none d-md-flex" *ngIf="getContentType() == 'application/pdf' && !useNativePdfViewer">
+      <div class="input-group-prepend">
+        <div class="input-group-text" i18n>Page</div>
+      </div>
+      <input class="form-control flex-grow-0 w-auto" type="number" min="1" [max]="previewNumPages" [(ngModel)]="previewCurrentPage" />
+      <div class="input-group-append">
+        <div class="input-group-text" i18n>of {{previewNumPages}}</div>
+      </div>
+    </div>
+
     <button type="button" class="btn btn-sm btn-outline-danger mr-2 ml-auto" (click)="delete()">
         <svg class="buttonicon" fill="currentColor">
             <use xlink:href="assets/bootstrap-icons.svg#trash" />
@@ -125,7 +135,12 @@
 
     <div class="col-md-6 col-xl-8 mb-3">
         <ng-container *ngIf="getContentType() == 'application/pdf'">
-          <object [data]="previewUrl | safe" class="preview-sticky" width="100%"></object>
+            <div class="preview-sticky pdf-viewer-container" *ngIf="!useNativePdfViewer ; else nativePdfViewer">
+                <pdf-viewer [src]="previewUrl" [original-size]="false" [show-borders]="true" [show-all]="true" [(page)]="previewCurrentPage" [render-text-mode]="2" (after-load-complete)="pdfPreviewLoaded($event)"></pdf-viewer>
+            </div>
+            <ng-template #nativePdfViewer>
+                <object [data]="previewUrl | safe" type="application/pdf" class="preview-sticky" width="100%"></object>
+            </ng-template>
         </ng-container>
         <ng-container *ngIf="getContentType() == 'text/plain'">
             <object [data]="previewUrl | safe" type="text/plain" class="preview-sticky" width="100%"></object>
diff --git a/src-ui/src/app/components/document-detail/document-detail.component.ts b/src-ui/src/app/components/document-detail/document-detail.component.ts
index 27360a811..af98a6f7f 100644
--- a/src-ui/src/app/components/document-detail/document-detail.component.ts
+++ b/src-ui/src/app/components/document-detail/document-detail.component.ts
@@ -15,6 +15,7 @@ import { DocumentService } from 'src/app/services/rest/document.service';
 import { ConfirmDialogComponent } from '../common/confirm-dialog/confirm-dialog.component';
 import { CorrespondentEditDialogComponent } from '../manage/correspondent-list/correspondent-edit-dialog/correspondent-edit-dialog.component';
 import { DocumentTypeEditDialogComponent } from '../manage/document-type-list/document-type-edit-dialog/document-type-edit-dialog.component';
+import { PDFDocumentProxy } from 'ng2-pdf-viewer';
 import { ToastService } from 'src/app/services/toast.service';
 import { TextComponent } from '../common/input/text/text.component';
 import { SettingsService, SETTINGS_KEYS } from 'src/app/services/settings.service';
@@ -60,6 +61,9 @@ export class DocumentDetailComponent implements OnInit {
     tags: new FormControl([])
   })
 
+  previewCurrentPage: number = 1
+  previewNumPages: number = 1
+
   constructor(
     private documentsService: DocumentService,
     private route: ActivatedRoute,
@@ -73,6 +77,10 @@ export class DocumentDetailComponent implements OnInit {
     private toastService: ToastService,
     private settings: SettingsService) { }
 
+  get useNativePdfViewer(): boolean {
+    return this.settings.get(SETTINGS_KEYS.USE_NATIVE_PDF_VIEWER)
+  }
+
   getContentType() {
     return this.metadata?.has_archive_version ? 'application/pdf' : this.metadata?.original_mime_type
   }
@@ -218,4 +226,8 @@ export class DocumentDetailComponent implements OnInit {
     return this.documentListViewService.hasNext(this.documentId)
   }
 
+  pdfPreviewLoaded(pdf: PDFDocumentProxy) {
+    this.previewNumPages = pdf.numPages
+  }
+
 }
diff --git a/src-ui/src/app/components/document-list/document-card-large/document-card-large.component.html b/src-ui/src/app/components/document-list/document-card-large/document-card-large.component.html
index cf969ddbe..c7f688bc4 100644
--- a/src-ui/src/app/components/document-list/document-card-large/document-card-large.component.html
+++ b/src-ui/src/app/components/document-list/document-card-large/document-card-large.component.html
@@ -43,7 +43,7 @@
                 <path fill-rule="evenodd" d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5L13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175l-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
               </svg>&nbsp;<span class="d-block d-md-inline" i18n>Edit</span>
             </a>
-            <a class="btn btn-sm btn-outline-secondary" [href]="previewUrl" title="Click to view in browser" i18n-title
+            <a class="btn btn-sm btn-outline-secondary" [href]="previewUrl"
             [ngbPopover]="previewContent" [popoverTitle]="document.title | documentTitle"
             autoClose="true" popoverClass="shadow" (mouseenter)="mouseEnterPreview()" (mouseleave)="mouseLeavePreview()" #popover="ngbPopover">
               <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-eye" viewBox="0 0 16 16">
diff --git a/src-ui/src/app/components/document-list/document-card-small/document-card-small.component.html b/src-ui/src/app/components/document-list/document-card-small/document-card-small.component.html
index aa0aa9225..eca5abb97 100644
--- a/src-ui/src/app/components/document-list/document-card-small/document-card-small.component.html
+++ b/src-ui/src/app/components/document-list/document-card-small/document-card-small.component.html
@@ -37,7 +37,7 @@
               <path fill-rule="evenodd" d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5L13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175l-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
             </svg>
           </a>
-          <a [href]="previewUrl" target="_blank" class="btn btn-sm btn-outline-secondary" title="Click to view in browser" i18n-title
+          <a [href]="previewUrl" target="_blank" class="btn btn-sm btn-outline-secondary"
           [ngbPopover]="previewContent" [popoverTitle]="document.title | documentTitle"
           autoClose="true" popoverClass="shadow" (mouseenter)="mouseEnterPreview()" (mouseleave)="mouseLeavePreview()" #popover="ngbPopover">
             <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-eye" viewBox="0 0 16 16">
diff --git a/src-ui/src/app/components/manage/settings/settings.component.html b/src-ui/src/app/components/manage/settings/settings.component.html
index 73b3b2b0d..c2a32906e 100644
--- a/src-ui/src/app/components/manage/settings/settings.component.html
+++ b/src-ui/src/app/components/manage/settings/settings.component.html
@@ -78,6 +78,17 @@
           </div>
         </div>
 
+        <div class="form-row form-group">
+          <div class="col-md-3 col-form-label">
+            <span i18n>Document editor</span>
+          </div>
+          <div class="col">
+
+            <app-input-check i18n-title title="Use PDF viewer provided by the browser" i18n-hint hint="This is usually faster for displaying large PDF documents, but it might not work on some browsers." formControlName="useNativePdfViewer"></app-input-check>
+
+          </div>
+        </div>
+
         <div class="form-row form-group">
           <div class="col-md-3 col-form-label">
             <span i18n>Dark mode</span>
diff --git a/src-ui/src/app/components/manage/settings/settings.component.ts b/src-ui/src/app/components/manage/settings/settings.component.ts
index 0933c2714..ab71b1028 100644
--- a/src-ui/src/app/components/manage/settings/settings.component.ts
+++ b/src-ui/src/app/components/manage/settings/settings.component.ts
@@ -22,6 +22,7 @@ export class SettingsComponent implements OnInit {
     'darkModeUseSystem': new FormControl(this.settings.get(SETTINGS_KEYS.DARK_MODE_USE_SYSTEM)),
     'darkModeEnabled': new FormControl(this.settings.get(SETTINGS_KEYS.DARK_MODE_ENABLED)),
     'darkModeInvertThumbs': new FormControl(this.settings.get(SETTINGS_KEYS.DARK_MODE_THUMB_INVERTED)),
+    'useNativePdfViewer': new FormControl(this.settings.get(SETTINGS_KEYS.USE_NATIVE_PDF_VIEWER)),
     'savedViews': this.savedViewGroup,
     'displayLanguage': new FormControl(this.settings.getLanguage()),
     'dateLocale': new FormControl(this.settings.get(SETTINGS_KEYS.DATE_LOCALE)),
@@ -75,6 +76,7 @@ export class SettingsComponent implements OnInit {
     this.settings.set(SETTINGS_KEYS.DARK_MODE_USE_SYSTEM, this.settingsForm.value.darkModeUseSystem)
     this.settings.set(SETTINGS_KEYS.DARK_MODE_ENABLED, (this.settingsForm.value.darkModeEnabled == true).toString())
     this.settings.set(SETTINGS_KEYS.DARK_MODE_THUMB_INVERTED, (this.settingsForm.value.darkModeInvertThumbs == true).toString())
+    this.settings.set(SETTINGS_KEYS.USE_NATIVE_PDF_VIEWER, this.settingsForm.value.useNativePdfViewer)
     this.settings.set(SETTINGS_KEYS.DATE_LOCALE, this.settingsForm.value.dateLocale)
     this.settings.set(SETTINGS_KEYS.DATE_FORMAT, this.settingsForm.value.dateFormat)
     this.settings.set(SETTINGS_KEYS.NOTIFICATIONS_CONSUMER_NEW_DOCUMENT, this.settingsForm.value.notificationsConsumerNewDocument)
diff --git a/src-ui/src/app/services/settings.service.ts b/src-ui/src/app/services/settings.service.ts
index 2285c1343..bc5725bab 100644
--- a/src-ui/src/app/services/settings.service.ts
+++ b/src-ui/src/app/services/settings.service.ts
@@ -27,6 +27,7 @@ export const SETTINGS_KEYS = {
   DARK_MODE_USE_SYSTEM: 'general-settings:dark-mode:use-system',
   DARK_MODE_ENABLED: 'general-settings:dark-mode:enabled',
   DARK_MODE_THUMB_INVERTED: 'general-settings:dark-mode:thumb-inverted',
+  USE_NATIVE_PDF_VIEWER: 'general-settings:document-details:native-pdf-viewer',
   DATE_LOCALE: 'general-settings:date-display:date-locale',
   DATE_FORMAT: 'general-settings:date-display:date-format',
   NOTIFICATIONS_CONSUMER_NEW_DOCUMENT: 'general-settings:notifications:consumer-new-documents',
@@ -42,6 +43,7 @@ const SETTINGS: PaperlessSettings[] = [
   {key: SETTINGS_KEYS.DARK_MODE_USE_SYSTEM, type: "boolean", default: true},
   {key: SETTINGS_KEYS.DARK_MODE_ENABLED, type: "boolean", default: false},
   {key: SETTINGS_KEYS.DARK_MODE_THUMB_INVERTED, type: "boolean", default: true},
+  {key: SETTINGS_KEYS.USE_NATIVE_PDF_VIEWER, type: "boolean", default: false},
   {key: SETTINGS_KEYS.DATE_LOCALE, type: "string", default: ""},
   {key: SETTINGS_KEYS.DATE_FORMAT, type: "string", default: "mediumDate"},
   {key: SETTINGS_KEYS.NOTIFICATIONS_CONSUMER_NEW_DOCUMENT, type: "boolean", default: true},