[DSC-516] Change truncable components in order to show more/less button

src/app/entity-groups/research-entities/item-list-elements/search-result-list-elements/org-unit/org-unit-search-result-list-element.component.html

@@ -7,13 +7,11 @@
           class="lead"
           [innerHTML]="firstMetadataValue('organization.legalName')"></span>
     <span class="text-muted">
-    <ds-truncatable-part [id]="dso.id" [minLines]="3">
-            <span *ngIf="dso.allMetadata(['dc.description']).length > 0"
-                  class="item-list-org-unit-description">
-                <ds-truncatable-part [id]="dso.id" [minLines]="3"><span
-                        [innerHTML]="firstMetadataValue('dc.description')"></span>
-                </ds-truncatable-part>
-            </span>
-        </ds-truncatable-part>
+      <span *ngIf="dso.allMetadata(['dc.description']).length > 0"
+            class="item-list-org-unit-description">
+            <ds-truncatable-part [id]="dso.id" [minLines]="3"><span
+                  [innerHTML]="firstMetadataValue('dc.description')"></span>
+            </ds-truncatable-part>
+      </span>
   </span>
 </ds-truncatable>

src/app/shared/truncatable/truncatable-part/truncatable-part.component.html

@@ -1,5 +1,11 @@
 <div class="clamp-{{background}}-{{lines}} min-{{minLines}} {{type}} {{fixedHeight ? 'fixedHeight' : ''}}">
-    <div class="content dont-break-out">
+    <div class="content dont-break-out" id="dontBreakContent">
         <ng-content></ng-content>
     </div>
+    <label for="dontBreakContent" role="button" id="expandButton">
+        <a dsDragClick (actualClick)="toggle()">
+            <i class="fas fa-angle-down"></i> {{ 'item.truncatable-part.show-more' | translate }}</a>
+    </label>
+    <a id="collapseButton" dsDragClick (actualClick)="toggle()" *ngIf="expand && expandable">
+        <i class="fas fa-angle-up"></i> {{ 'item.truncatable-part.show-less' | translate }}</a>
 </div>

src/app/shared/truncatable/truncatable-part/truncatable-part.component.scss

@@ -0,0 +1,10 @@
+#dontBreakContent:not(.truncated) ~ label{
+    display: none;
+  }
+
+a {
+    color: #207698 !important;
+    text-decoration: none !important;
+    background-color: transparent !important;
+    cursor: pointer;
+}

src/app/shared/truncatable/truncatable-part/truncatable-part.component.spec.ts

@@ -4,10 +4,16 @@ import { TruncatablePartComponent } from './truncatable-part.component';
 import { TruncatableService } from '../truncatable.service';
 import { ChangeDetectionStrategy, NO_ERRORS_SCHEMA } from '@angular/core';
 import { NoopAnimationsModule } from '@angular/platform-browser/animations';
+import { TranslateLoader, TranslateModule, TranslateService } from '@ngx-translate/core';
+import { getMockTranslateService } from '../../mocks/translate.service.mock';
+import { TranslateLoaderMock } from '../../mocks/translate-loader.mock';
+import { mockTruncatableService } from '../../mocks/mock-trucatable.service';
+import { By } from '@angular/platform-browser';
 
 describe('TruncatablePartComponent', () => {
   let comp: TruncatablePartComponent;
   let fixture: ComponentFixture<TruncatablePartComponent>;
+  let translateService: TranslateService;
   const id1 = '123';
   const id2 = '456';
 
@@ -22,8 +28,16 @@ describe('TruncatablePartComponent', () => {
     }
   };
   beforeEach(waitForAsync(() => {
+    translateService = getMockTranslateService();
     TestBed.configureTestingModule({
-      imports: [NoopAnimationsModule],
+      imports: [NoopAnimationsModule,
+        TranslateModule.forRoot({
+          loader: {
+            provide: TranslateLoader,
+            useClass: TranslateLoaderMock
+          }
+        }),
+      ],
       declarations: [TruncatablePartComponent],
       providers: [
         { provide: TruncatableService, useValue: truncatableServiceStub },
@@ -52,6 +66,11 @@ describe('TruncatablePartComponent', () => {
     it('lines should equal minlines', () => {
       expect((comp as any).lines).toEqual(comp.minLines.toString());
     });
+
+    it('collapseButton should be hidden', () => {
+      const a = fixture.debugElement.query(By.css('#collapseButton'));
+      expect(a).toBeNull();
+    });
   });
 
   describe('When the item is expanded', () => {
@@ -72,5 +91,62 @@ describe('TruncatablePartComponent', () => {
       fixture.detectChanges();
       expect((comp as any).lines).toEqual('none');
     });
+
+    it('collapseButton should be shown', () => {
+      (comp as any).setLines();
+      (comp as any).expandable = true;
+      fixture.detectChanges();
+      const a = fixture.debugElement.query(By.css('#collapseButton'));
+      expect(a).not.toBeNull();
+    });
   });
 });
+
+describe('TruncatablePartComponent', () => {
+  let comp: TruncatablePartComponent;
+  let fixture: ComponentFixture<TruncatablePartComponent>;
+  let translateService: TranslateService;
+  const identifier = '1234567890';
+  let truncatableService;
+  beforeEach(waitForAsync(() => {
+    translateService = getMockTranslateService();
+    TestBed.configureTestingModule({
+      imports: [
+        NoopAnimationsModule,
+        TranslateModule.forRoot({
+          loader: {
+            provide: TranslateLoader,
+            useClass: TranslateLoaderMock
+          }
+        }),
+      ],
+      declarations: [TruncatablePartComponent],
+      providers: [
+        { provide: TruncatableService, useValue: mockTruncatableService },
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).overrideComponent(TruncatablePartComponent, {
+      set: { changeDetection: ChangeDetectionStrategy.Default }
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(TruncatablePartComponent);
+    comp = fixture.componentInstance; // TruncatablePartComponent test instance
+    comp.id = identifier;
+    fixture.detectChanges();
+    truncatableService = (comp as any).service;
+  });
+
+  describe('When toggle is called', () => {
+    beforeEach(() => {
+      spyOn(truncatableService, 'toggle');
+      comp.toggle();
+    });
+
+    it('should call toggle on the TruncatableService', () => {
+      expect(truncatableService.toggle).toHaveBeenCalledWith(identifier);
+    });
+  });
+
+});

src/app/shared/truncatable/truncatable-part/truncatable-part.component.ts

@@ -1,6 +1,8 @@
-import { Component, Input, OnDestroy, OnInit } from '@angular/core';
+import { Component, Inject, Input, OnDestroy, OnInit, PLATFORM_ID } from '@angular/core';
 import { TruncatableService } from '../truncatable.service';
 import { hasValue } from '../../empty.util';
+import { DOCUMENT, isPlatformBrowser } from '@angular/common';
+import { NativeWindowRef, NativeWindowService } from 'src/app/core/services/window.service';
 
 @Component({
   selector: 'ds-truncatable-part',
@@ -49,8 +51,34 @@ export class TruncatablePartComponent implements OnInit, OnDestroy {
    * Subscription to unsubscribe from
    */
   private sub;
+  /**
+   * store variable used for local to expand collapse
+   */
+  expand = false;
+  /**
+   * variable to check if expandable
+   */
+  expandable = false;
+  /**
+   * variable to check if it is a browser
+   */
+  isBrowser: boolean;
+  /**
+   * variable which save get observer
+   */
+  observer;
+  /**
+   * variable to save content to be observed
+   */
+  observedContent;
 
-  public constructor(private service: TruncatableService) {
+  public constructor(
+    private service: TruncatableService,
+    @Inject(DOCUMENT) private document: any,
+    @Inject(NativeWindowService) private _window: NativeWindowRef,
+    @Inject(PLATFORM_ID) platformId: object
+    ) {
+      this.isBrowser = isPlatformBrowser(platformId);
   }
 
   /**
@@ -67,12 +95,70 @@ export class TruncatablePartComponent implements OnInit, OnDestroy {
     this.sub = this.service.isCollapsed(this.id).subscribe((collapsed: boolean) => {
       if (collapsed) {
         this.lines = this.minLines.toString();
+        this.expand = false;
       } else {
         this.lines = this.maxLines < 0 ? 'none' : this.maxLines.toString();
+        this.expand = true;
       }
     });
   }
 
+  ngAfterContentChecked() {
+    if (this.isBrowser) {
+      if (this.observer && this.observedContent) {
+        this.toUnobserve();
+      }
+      this.toObserve();
+    }
+  }
+
+  /**
+   * Function to get data to be observed
+   */
+  toObserve() {
+    this.observedContent = this.document.querySelectorAll('#dontBreakContent');
+    this.observer = new (this._window.nativeWindow as any).ResizeObserver(entries => {
+      // tslint:disable-next-line:prefer-const
+      for (let entry of entries) {
+        if (!entry.target.classList.contains('notruncatable')) {
+          if (entry.target.scrollHeight > entry.contentRect.height) {
+            if (entry.target.children.length > 0) {
+              if (entry.target.children[0].offsetHeight > entry.contentRect.height) {
+                entry.target.classList.add('truncated');
+              } else {
+                entry.target.classList.remove('truncated');
+              }
+            } else {
+              entry.target.classList.add('truncated');
+            }
+          } else {
+            entry.target.classList.remove('truncated');
+          }
+        }
+      }
+    });
+    this.observedContent.forEach(p => {
+      this.observer.observe(p);
+    });
+  }
+
+  /**
+   * Function to remove data which is observed
+   */
+   toUnobserve() {
+    this.observedContent.forEach(p => {
+      this.observer.unobserve(p);
+    });
+   }
+
+  /**
+   * Expands the truncatable when it's collapsed, collapses it when it's expanded
+   */
+  public toggle() {
+    this.service.toggle(this.id);
+    this.expandable = !this.expandable;
+  }
+
   /**
    * Unsubscribe from the subscription
    */
@@ -80,5 +166,8 @@ export class TruncatablePartComponent implements OnInit, OnDestroy {
     if (hasValue(this.sub)) {
       this.sub.unsubscribe();
     }
+    if (this.isBrowser) {
+      this.toUnobserve();
+    }
   }
 }

src/app/shared/truncatable/truncatable.component.html

@@ -1,3 +1,3 @@
-<div dsDragClick (actualClick)="toggle()" (mouseenter)="hoverExpand()" (mouseleave)="hoverCollapse()">
+<div (mouseenter)="hoverExpand()" (mouseleave)="hoverCollapse()">
     <ng-content></ng-content>
 </div>

src/app/shared/truncatable/truncatable.component.spec.ts

@@ -70,15 +70,4 @@ describe('TruncatableComponent', () => {
     });
   });
 
-  describe('When toggle is called', () => {
-    beforeEach(() => {
-      spyOn(truncatableService, 'toggle');
-      comp.toggle();
-    });
-
-    it('should call toggle on the TruncatableService', () => {
-      expect(truncatableService.toggle).toHaveBeenCalledWith(identifier);
-    });
-  });
-
 });

src/app/shared/truncatable/truncatable.component.ts

@@ -1,6 +1,4 @@
-import {
-  Component, Input
-} from '@angular/core';
+import { AfterViewChecked, Component, ElementRef, Input, OnInit } from '@angular/core';
 import { TruncatableService } from './truncatable.service';
 
 @Component({
@@ -13,7 +11,7 @@ import { TruncatableService } from './truncatable.service';
 /**
  * Component that represents a section with one or more truncatable parts that all listen to this state
  */
-export class TruncatableComponent {
+export class TruncatableComponent implements OnInit, AfterViewChecked {
   /**
    * Is true when all truncatable parts in this truncatable should be expanded on loading
    */
@@ -29,7 +27,7 @@ export class TruncatableComponent {
    */
   @Input() onHover = false;
 
-  public constructor(private service: TruncatableService) {
+  public constructor(private service: TruncatableService, private el: ElementRef,) {
   }
 
   /**
@@ -61,11 +59,14 @@ export class TruncatableComponent {
     }
   }
 
-  /**
-   * Expands the truncatable when it's collapsed, collapses it when it's expanded
-   */
-  public toggle() {
-    this.service.toggle(this.id);
+  ngAfterViewChecked() {
+    const truncatedElements = this.el.nativeElement.querySelectorAll('.truncated');
+    if (truncatedElements?.length > 1) {
+      for (let i = 0; i < (truncatedElements.length - 1); i++) {
+        truncatedElements[i].classList.remove('truncated');
+        truncatedElements[i].classList.add('notruncatable');
+      }
+    }
   }
 
 }

src/assets/i18n/en.json5

@@ -2056,6 +2056,10 @@
 
   "item.search.title": "Item Search",
 
+  "item.truncatable-part.show-more": "Show more",
+
+  "item.truncatable-part.show-less": "Collapse",
+
 
 
   "item.page.abstract": "Abstract",