[ADF-1416] image viewer enhancements (#2895)

* image viewer enhancements

* code improvements

* fix scrolling of the zommed in content

* remove flip for now as it needs much efforts

* unit tests, thumbnail selector enhancements

lib/core/i18n/en.json

@@ -195,7 +195,10 @@
       "NEXT_PAGE": "Next page",
       "ZOOM_IN": "Zoom in",
       "ZOOM_OUT": "Zoom out",
-      "FIT_PAGE": "Fit page"
+      "FIT_PAGE": "Fit page",
+      "ROTATE_LEFT": "Rotate left",
+      "ROTATE_RIGHT": "Rotate right",
+      "RESET": "Reset"
     },
     "PAGE_LABEL": {
       "SHOWING": "Showing",

lib/core/services/thumbnail.service.ts

@@ -29,6 +29,8 @@ export class ThumbnailService {
         'image/png': './assets/images/ft_ic_raster_image.svg',
         'image/jpeg': './assets/images/ft_ic_raster_image.svg',
         'image/gif': './assets/images/ft_ic_raster_image.svg',
+        'application/eps': './assets/images/ft_ic_raster_image.svg',
+        'application/illustrator': './assets/images/ft_ic_raster_image.svg',
         'application/pdf': './assets/images/ft_ic_pdf.svg',
         'application/vnd.ms-excel': './assets/images/ft_ic_ms_excel.svg',
         'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': './assets/images/ft_ic_ms_excel.svg',

lib/core/viewer/components/imgViewer.component.html

@@ -1,27 +1,56 @@
 <div class="image-container" [ngStyle]="{ transform: transform }">
-    <img id="viewer-image" [src]="urlFile" [alt]="nameFile" />
+    <img id="viewer-image" [src]="urlFile" [alt]="nameFile" [ngStyle]="{ 'cursor' : isDragged ? 'move': 'default' } " />
 </div>
 
 <div class="adf-image-viewer__toolbar" *ngIf="showToolbar">
     <adf-toolbar>
-        <button mat-icon-button (click)="zoomIn()">
+        <button
+            id="viewer-zoom-in-button"
+            mat-icon-button
+            title="{{ 'ADF_VIEWER.ARIA.ZOOM_IN' | translate }}"
+            attr.aria-label="{{ 'ADF_VIEWER.ARIA.ZOOM_IN' | translate }}"
+            (click)="zoomIn()">
             <mat-icon>zoom_in</mat-icon>
         </button>
 
-        <button mat-icon-button (click)="zoomOut()">
+        <button
+            id="viewer-zoom-out-button"
+            title="{{ 'ADF_VIEWER.ARIA.ZOOM_OUT' | translate }}"
+            attr.aria-label="{{ 'ADF_VIEWER.ARIA.ZOOM_OUT' | translate }}"
+            mat-icon-button
+            (click)="zoomOut()">
             <mat-icon>zoom_out</mat-icon>
         </button>
 
-        <button mat-icon-button (click)="rotateLeft()">
+        <div class="adf-viewer__toolbar-page-scale">
+            {{ currentScaleText }}
+        </div>
+
+        <button
+            id="viewer-rotate-left-button"
+            title="{{ 'ADF_VIEWER.ARIA.ROTATE_LEFT' | translate }}"
+            attr.aria-label="{{ 'ADF_VIEWER.ARIA.ROTATE_LEFT' | translate }}"
+            mat-icon-button
+            (click)="rotateLeft()">
             <mat-icon>rotate_left</mat-icon>
         </button>
 
-        <button mat-icon-button (click)="rotateRight()">
+        <button
+            id="viewer-rotate-right-button"
+            title="{{ 'ADF_VIEWER.ARIA.ROTATE_RIGHT' | translate }}"
+            attr.aria-label="{{ 'ADF_VIEWER.ARIA.ROTATE_RIGHT' | translate }}"
+            mat-icon-button
+            (click)="rotateRight()">
             <mat-icon>rotate_right</mat-icon>
         </button>
 
-        <button mat-icon-button (click)="flip()">
-            <mat-icon>flip</mat-icon>
+        <button
+            id="viewer-reset-button"
+            title="{{ 'ADF_VIEWER.ARIA.RESET' | translate }}"
+            attr.aria-label="{{ 'ADF_VIEWER.ARIA.RESET' | translate }}"
+            mat-icon-button
+            (click)="reset()">
+            <mat-icon>zoom_out_map</mat-icon>
         </button>
     </adf-toolbar>
 </div>

lib/core/viewer/components/imgViewer.component.spec.ts

@@ -62,6 +62,176 @@ describe('Test Img viewer component ', () => {
         fixture.detectChanges();
     });
 
+    it('should display current scale as percent string', () => {
+        component.scaleX = 0.5;
+        expect(component.currentScaleText).toBe('50%');
+
+        component.scaleX = 1.0;
+        expect(component.currentScaleText).toBe('100%');
+    });
+
+    it('should generate transform settings', () => {
+        component.scaleX = 1.0;
+        component.scaleY = 2.0;
+        component.rotate = 10;
+        component.offsetX = 20;
+        component.offsetY = 30;
+
+        expect(component.transform).toBe('scale(1, 2) rotate(10deg) translate(20px, 30px)');
+    });
+
+    it('should start drag on mouse down', () => {
+        expect(component.isDragged).toBeFalsy();
+
+        component.onMouseDown(<any> new CustomEvent('mousedown'));
+
+        expect(component.isDragged).toBeTruthy();
+    });
+
+    it('should prevent default behaviour on mouse down', () => {
+        const event = jasmine.createSpyObj('mousedown', ['preventDefault']);
+
+        component.onMouseDown(event);
+
+        expect(event.preventDefault).toHaveBeenCalled();
+    });
+
+    it('should prevent default mouse move during drag', () => {
+        const event = jasmine.createSpyObj('mousemove', ['preventDefault']);
+
+        component.onMouseDown(<any> new CustomEvent('mousedown'));
+        component.onMouseMove(event);
+
+        expect(event.preventDefault).toHaveBeenCalled();
+    });
+
+    it('should not prevent default mouse move if not dragged', () => {
+        const event = jasmine.createSpyObj('mousemove', ['preventDefault']);
+
+        component.onMouseMove(event);
+
+        expect(component.isDragged).toBeFalsy();
+        expect(event.preventDefault).not.toHaveBeenCalled();
+    });
+
+    it('should prevent default mouse up during drag end', () => {
+        const event = jasmine.createSpyObj('mouseup', ['preventDefault']);
+
+        component.onMouseDown(<any> new CustomEvent('mousedown'));
+        expect(component.isDragged).toBeTruthy();
+
+        component.onMouseUp(event);
+        expect(event.preventDefault).toHaveBeenCalled();
+    });
+
+    it('should stop drag on mouse up', () => {
+        component.onMouseDown(<any> new CustomEvent('mousedown'));
+        expect(component.isDragged).toBeTruthy();
+
+        component.onMouseUp(<any> new CustomEvent('mouseup'));
+        expect(component.isDragged).toBeFalsy();
+    });
+
+    it('should stop drag on mouse leave', () => {
+        component.onMouseDown(<any> new CustomEvent('mousedown'));
+        expect(component.isDragged).toBeTruthy();
+
+        component.onMouseLeave(<any> new CustomEvent('mouseleave'));
+        expect(component.isDragged).toBeFalsy();
+    });
+
+    it('should stop drag on mouse out', () => {
+        component.onMouseDown(<any> new CustomEvent('mousedown'));
+        expect(component.isDragged).toBeTruthy();
+
+        component.onMouseOut(<any> new CustomEvent('mouseout'));
+        expect(component.isDragged).toBeFalsy();
+    });
+
+    it('should update scales on zoom in', () => {
+        component.scaleX = 1.0;
+
+        component.zoomIn();
+        expect(component.scaleX).toBe(1.2);
+        expect(component.scaleY).toBe(1.2);
+
+        component.zoomIn();
+        expect(component.scaleX).toBe(1.4);
+        expect(component.scaleY).toBe(1.4);
+    });
+
+    it('should update scales on zoom out', () => {
+        component.scaleX = 1.0;
+
+        component.zoomOut();
+        expect(component.scaleX).toBe(0.8);
+        expect(component.scaleY).toBe(0.8);
+
+        component.zoomOut();
+        expect(component.scaleX).toBe(0.6);
+        expect(component.scaleY).toBe(0.6);
+    });
+
+    it('should not zoom out past 20%', () => {
+        component.scaleX = 0.4;
+
+        component.zoomOut();
+        component.zoomOut();
+        component.zoomOut();
+
+        expect(component.scaleX).toBe(0.2);
+    });
+
+    it('should update angle by 90 degrees on rotate left', () => {
+        component.rotate = 0;
+
+        component.rotateLeft();
+        expect(component.rotate).toBe(-90);
+
+        component.rotateLeft();
+        expect(component.rotate).toBe(-180);
+    });
+
+    it('should reset to 0 degrees for full rotate left round', () => {
+        component.rotate = -270;
+
+        component.rotateLeft();
+        expect(component.rotate).toBe(0);
+    });
+
+    it('should update angle by 90 degrees on rotate right', () => {
+        component.rotate = 0;
+
+        component.rotateRight();
+        expect(component.rotate).toBe(90);
+
+        component.rotateRight();
+        expect(component.rotate).toBe(180);
+    });
+
+    it('should reset to 0 degrees for full rotate right round', () => {
+        component.rotate = 270;
+
+        component.rotateRight();
+        expect(component.rotate).toBe(0);
+    });
+
+    it('should reset all image modifications', () => {
+        component.rotate = 10;
+        component.scaleX = 20;
+        component.scaleY = 30;
+        component.offsetX = 40;
+        component.offsetY = 50;
+
+        component.reset();
+
+        expect(component.rotate).toBe(0);
+        expect(component.scaleX).toBe(1.0);
+        expect(component.scaleY).toBe(1.0);
+        expect(component.offsetX).toBe(0);
+        expect(component.offsetY).toBe(0);
+    });
+
     it('If no url or blob are passed should thrown an error', () => {
         let change = new SimpleChange(null, null, true);
         expect(() => {

lib/core/viewer/components/imgViewer.component.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { Component, Input, OnChanges, SimpleChanges, ViewEncapsulation } from '@angular/core';
+import { Component, Input, OnChanges, SimpleChanges, ViewEncapsulation, ElementRef, OnInit, OnDestroy } from '@angular/core';
 import { ContentService } from '../../services/content.service';
 
 @Component({
@@ -25,7 +25,7 @@ import { ContentService } from '../../services/content.service';
     host: { 'class': 'adf-image-viewer' },
     encapsulation: ViewEncapsulation.None
 })
-export class ImgViewerComponent implements OnChanges {
+export class ImgViewerComponent implements OnInit, OnChanges, OnDestroy {
 
     @Input()
     showToolbar = true;
@@ -42,12 +42,94 @@ export class ImgViewerComponent implements OnChanges {
     rotate: number = 0;
     scaleX: number = 1.0;
     scaleY: number = 1.0;
+    offsetX: number = 0;
+    offsetY: number = 0;
+    isDragged: boolean = false;
+
+    private drag = { x: 0, y: 0 };
+    private delta = { x: 0, y: 0 };
 
     get transform(): string {
-        return `scale(${this.scaleX}, ${this.scaleY}) rotate(${this.rotate}deg)`
+        return `scale(${this.scaleX}, ${this.scaleY}) rotate(${this.rotate}deg) translate(${this.offsetX}px, ${this.offsetY}px)`;
     }
 
-    constructor(private contentService: ContentService) {}
+    get currentScaleText(): string {
+        return Math.round(this.scaleX * 100) + '%';
+    }
+
+    private element: HTMLElement;
+
+    constructor(
+        private contentService: ContentService,
+        private el: ElementRef) {
+    }
+
+    ngOnInit() {
+        this.element = (<HTMLElement> this.el.nativeElement).querySelector('#viewer-image');
+
+        if (this.element) {
+            this.element.addEventListener('mousedown', this.onMouseDown.bind(this));
+            this.element.addEventListener('mouseup', this.onMouseUp.bind(this));
+            this.element.addEventListener('mouseleave', this.onMouseLeave.bind(this));
+            this.element.addEventListener('mouseout', this.onMouseOut.bind(this));
+            this.element.addEventListener('mousemove', this.onMouseMove.bind(this));
+        }
+    }
+
+    ngOnDestroy() {
+        if (this.element) {
+            this.element.removeEventListener('mousedown', this.onMouseDown);
+            this.element.removeEventListener('mouseup', this.onMouseUp);
+            this.element.removeEventListener('mouseleave', this.onMouseLeave);
+            this.element.removeEventListener('mouseout', this.onMouseOut);
+            this.element.removeEventListener('mousemove', this.onMouseMove);
+        }
+    }
+
+    onMouseDown(event: MouseEvent) {
+        event.preventDefault();
+        this.isDragged = true;
+        this.drag = { x: event.pageX, y: event.pageY };
+    }
+
+    onMouseMove(event: MouseEvent) {
+        if (this.isDragged) {
+            event.preventDefault();
+
+            this.delta.x = event.pageX - this.drag.x;
+            this.delta.y = event.pageY - this.drag.y;
+
+            this.drag.x = event.pageX;
+            this.drag.y = event.pageY;
+
+            const scaleX = (this.scaleX !== 0 ? this.scaleX : 1.0);
+            const scaleY = (this.scaleY !== 0 ? this.scaleY : 1.0);
+
+            this.offsetX += (this.delta.x / scaleX);
+            this.offsetY += (this.delta.y / scaleY);
+        }
+    }
+
+    onMouseUp(event: MouseEvent) {
+        if (this.isDragged) {
+            event.preventDefault();
+            this.isDragged = false;
+        }
+    }
+
+    onMouseLeave(event: MouseEvent) {
+        if (this.isDragged) {
+            event.preventDefault();
+            this.isDragged = false;
+        }
+    }
+
+    onMouseOut(event: MouseEvent) {
+        if (this.isDragged) {
+            event.preventDefault();
+            this.isDragged = false;
+        }
+    }
 
     ngOnChanges(changes: SimpleChanges) {
         let blobFile = changes['blobFile'];
@@ -83,7 +165,11 @@ export class ImgViewerComponent implements OnChanges {
         this.rotate = Math.abs(angle) < 360 ? angle : 0;
     }
 
-    flip() {
-        this.scaleX *= -1;
+    reset() {
+        this.rotate = 0;
+        this.scaleX = 1.0;
+        this.scaleY = 1.0;
+        this.offsetX = 0;
+        this.offsetY = 0;
     }
 }

lib/core/viewer/components/pdfViewer.component.html

@@ -20,6 +20,7 @@
 
         <button
             id="viewer-previous-page-button"
+            title="{{ 'ADF_VIEWER.ARIA.PREVIOUS_PAGE' | translate }}"
             attr.aria-label="{{ 'ADF_VIEWER.ARIA.PREVIOUS_PAGE' | translate }}"
             mat-icon-button
             (click)="previousPage()">
@@ -28,6 +29,7 @@
 
         <button
             id="viewer-next-page-button"
+            title="{{ 'ADF_VIEWER.ARIA.NEXT_PAGE' | translate }}"
             attr.aria-label="{{ 'ADF_VIEWER.ARIA.NEXT_PAGE' | translate }}"
             mat-icon-button
             (click)="nextPage()">
@@ -44,12 +46,13 @@
             <span>{{ 'ADF_VIEWER.PAGE_LABEL.OF' | translate }} {{ totalPages }}</span>
         </div>
 
-        <div class="adf-pdf-viewer__toolbar-page-scale">
+        <div class="adf-viewer__toolbar-page-scale">
             {{ currentScaleText }}
         </div>
 
         <button
             id="viewer-zoom-in-button"
+            title="{{ 'ADF_VIEWER.ARIA.ZOOM_IN' | translate }}"
             attr.aria-label="{{ 'ADF_VIEWER.ARIA.ZOOM_IN' | translate }}"
             mat-icon-button
             (click)="zoomIn()">
@@ -58,6 +61,7 @@
 
         <button
             id="viewer-zoom-out-button"
+            title="{{ 'ADF_VIEWER.ARIA.ZOOM_OUT' | translate }}"
             attr.aria-label="{{ 'ADF_VIEWER.ARIA.ZOOM_OUT' | translate }}"
             mat-icon-button
             (click)="zoomOut()">
@@ -66,6 +70,7 @@
 
         <button
             id="viewer-scale-page-button"
+            title="{{ 'ADF_VIEWER.ARIA.FIT_PAGE' | translate }}"
             attr.aria-label="{{ 'ADF_VIEWER.ARIA.FIT_PAGE' | translate }}"
             mat-icon-button
             (click)="pageFit()">

lib/core/viewer/components/pdfViewer.component.scss

@@ -53,18 +53,6 @@
                     outline-color: gray;
                 }
             }
-
-            &-page-scale {
-                cursor: default;
-                width: 79px;
-                height: 24px;
-                font-size: 14px;
-                border: 1px solid mat-color($foreground, text, 0.07);
-                text-align: center;
-                line-height: 24px;
-                margin-left: 4px;
-                margin-right: 4px;
-            }
         }
     }
 }

lib/core/viewer/components/viewer.component.scss

@@ -61,7 +61,7 @@
             .adf-viewer-layout-content {
                 @extend .full-screen;
                 position: relative;
-                overflow-y: auto;
+                overflow-y: hidden;
                 overflow-x: hidden;
                 z-index: 1;
                 background-color: mat-color($background, background);
@@ -143,5 +143,19 @@
             border-left: 1px solid mat-color($foreground, text, 0.07);
             overflow: auto;
         }
+
+        &__toolbar {
+            &-page-scale {
+                cursor: default;
+                width: 79px;
+                height: 24px;
+                font-size: 14px;
+                border: 1px solid mat-color($foreground, text, 0.07);
+                text-align: center;
+                line-height: 24px;
+                margin-left: 4px;
+                margin-right: 4px;
+            }
+        }
     }
 }