Checks, if content is too large and hide it in 'meta-text-block'

- Also updates the library 'css-element-queries'.
- Builds a directive to check, if the scroll-height of an element
has changed.

client/package.json

@@ -51,7 +51,7 @@
         "@tinymce/tinymce-angular": "^3.2.0",
         "acorn": "^6.1.1",
         "core-js": "^3.0.1",
-        "css-element-queries": "^1.1.1",
+        "css-element-queries": "^1.2.1",
         "exceljs": "1.10.0",
         "file-saver": "^2.0.1",
         "hammerjs": "^2.0.8",

client/src/app/shared/components/meta-text-block/meta-text-block.component.html

@@ -3,18 +3,29 @@
         <mat-card-header>
             <mat-card-title>
                 <div class="title-container">
-                    <div>
+                    <div class="ellipsis-overflow">
                         <ng-container *ngTemplateOutlet="title"></ng-container>
                     </div>
-                    <div *ngIf="showActionRow">
+                    <div class="action-row" *ngIf="showActionRow">
                         <ng-container *ngTemplateOutlet="actionRow"></ng-container>
                     </div>
                 </div>
-
             </mat-card-title>
         </mat-card-header>
         <mat-card-content>
+            <!-- Content -->
+            <div
+                #contentBox
+                [osHeightResizing]="resizeSubject"
+                class="content"
+                [ngClass]="!isExpanded && !disableExpandControl ? 'collapsed' : ''"
+            >
                 <ng-container *ngTemplateOutlet="content"></ng-container>
+            </div>
+            <!-- Expanding control -->
+            <div class="small show-entire-text" *ngIf="canExpand && !disableExpandControl">
+                <a (click)="isExpanded = !isExpanded">{{ isExpanded ? 'Hide more text' : 'Show full text' }}</a>
+            </div>
         </mat-card-content>
     </mat-card>
 </div>

client/src/app/shared/components/meta-text-block/meta-text-block.component.scss

@@ -1,11 +1,20 @@
-.meta-text-block {
+@import '~@angular/material/theming';
+
+@mixin os-meta-text-block-style($theme) {
+    $foreground: map-get($theme, foreground);
+
+    .meta-text-block {
         padding: 0px;
         margin: 20px 0;
         min-width: 200px;
 
+        .mat-icon-button mat-icon {
+            color: mat-color($foreground, icon);
+            font-size: 18px;
+        }
+
         mat-card-header {
             display: inherit;
-        padding-top: 10px;
             margin: 0;
 
             .mat-card-header-text {
@@ -18,7 +27,12 @@
 
                 .title-container {
                     display: flex;
+                    align-items: center;
                     justify-content: space-between;
+
+                    .action-row {
+                        display: flex;
+                    }
                 }
             }
         }
@@ -26,5 +40,33 @@
         mat-card-content {
             padding: 15px;
             word-wrap: break-word;
+
+            .content {
+                transition: all 1s ease;
+
+                &.collapsed {
+                    max-height: 200px;
+                    overflow: hidden;
+                    position: relative;
+                    &::after {
+                        content: '';
+                        position: absolute;
+                        top: 150px;
+                        bottom: 0;
+                        left: 0;
+                        right: 0;
+                        background: linear-gradient(rgba(255, 255, 255, 0), rgba(255, 255, 255, 1));
+                    }
+                }
+            }
+
+            .show-entire-text {
+                text-align: end;
+                margin-top: 4px;
+                a {
+                    cursor: pointer;
+                }
+            }
+        }
     }
 }

client/src/app/shared/components/meta-text-block/meta-text-block.component.ts

@@ -1,7 +1,8 @@
-import { Component, Input } from '@angular/core';
+import { ChangeDetectorRef, Component, Input, OnDestroy, OnInit } from '@angular/core';
 import { Title } from '@angular/platform-browser';
 
 import { TranslateService } from '@ngx-translate/core';
+import { Subject, Subscription } from 'rxjs';
 
 import { ViewportService } from 'app/core/ui-services/viewport.service';
 import { BaseComponent } from '../../../base.component';
@@ -14,11 +15,102 @@ import { BaseComponent } from '../../../base.component';
     templateUrl: './meta-text-block.component.html',
     styleUrls: ['./meta-text-block.component.scss']
 })
-export class MetaTextBlockComponent extends BaseComponent {
+export class MetaTextBlockComponent extends BaseComponent implements OnInit, OnDestroy {
+    /**
+     * Indicates, whether the action-row should be shown.
+     */
     @Input()
     public showActionRow: boolean;
 
-    public constructor(title: Title, translate: TranslateService, public vp: ViewportService) {
+    /**
+     * Indicates, whether the content should be expandable or always expanded.
+     *
+     * If `true`, it resets the flag `isExpanded`. This prevents an error -
+     * when the given element is expanded and the control was disabled, the
+     * subscription is deleted.
+     */
+    @Input()
+    public set disableExpandControl(disableControl: boolean) {
+        this._disableExpandControl = disableControl;
+        if (disableControl) {
+            this.isExpanded = false;
+            this.cd.detectChanges();
+        }
+    }
+
+    /**
+     * Returns the flag `disableExpandControl`.
+     */
+    public get disableExpandControl(): boolean {
+        return this._disableExpandControl;
+    }
+
+    /**
+     * Boolean, whether the control to expand the element should be disabled or not.
+     */
+    private _disableExpandControl = false;
+
+    /**
+     * Boolean to see, if the content can be expanded.
+     */
+    public canExpand = false;
+
+    /**
+     * Boolean to see, if the content is currently expanded.
+     */
+    public isExpanded = false;
+
+    /**
+     * Subject to listen, whether the height of the given dom-element has changed.
+     */
+    public resizeSubject = new Subject<number>();
+
+    /**
+     * Subscription to resize-change-events for the height of the content.
+     */
+    private contentSubscription: Subscription;
+
+    /**
+     * Default constructor.
+     *
+     * @param title
+     * @param translate
+     * @param vp
+     * @param cd
+     */
+    public constructor(
+        title: Title,
+        translate: TranslateService,
+        public vp: ViewportService,
+        private cd: ChangeDetectorRef
+    ) {
         super(title, translate);
     }
+
+    /**
+     * Sets the subscription.
+     */
+    public ngOnInit(): void {
+        this.contentSubscription = this.resizeSubject.subscribe(newHeight => this.resizesContentBox(newHeight));
+    }
+
+    /**
+     * Deletes and unsubscribes to subscription.
+     */
+    public ngOnDestroy(): void {
+        if (this.contentSubscription) {
+            this.contentSubscription.unsubscribe();
+            this.contentSubscription = null;
+        }
+    }
+
+    /**
+     * Function to check, if the new height of the element
+     * is greater than the limit of `200px`.
+     *
+     * @param height The new height as `number` of the linked element.
+     */
+    private resizesContentBox(height: number): void {
+        this.canExpand = height > 200;
+    }
 }

client/src/app/shared/directives/height-resizing.directive.spec.ts

@@ -0,0 +1,8 @@
+import { HeightResizingDirective } from './height-resizing.directive';
+
+describe('HeightResizingDirective', () => {
+    it('should create an instance', () => {
+        const directive = new HeightResizingDirective(null);
+        expect(directive).toBeTruthy();
+    });
+});

client/src/app/shared/directives/height-resizing.directive.ts

@@ -0,0 +1,69 @@
+import { Directive, ElementRef, Input, OnInit } from '@angular/core';
+
+import { ResizeSensor } from 'css-element-queries';
+import { Subject } from 'rxjs';
+
+/**
+ * Directive to check, if the `ScrollHeight` of the underlying element has changed.
+ */
+@Directive({
+    selector: '[osHeightResizing]'
+})
+export class HeightResizingDirective implements OnInit {
+    /**
+     * A subject to notify, when the given element changes its `ScrollHeight`.
+     */
+    @Input()
+    public osHeightResizing: Subject<number>;
+
+    /**
+     * The underlying native-element of the passed element.
+     */
+    private nativeElement: HTMLElement;
+
+    /**
+     * Stores the old height to see, if the height changed.
+     */
+    private oldHeight: number;
+
+    /**
+     * Constructor.
+     * Initializes the `nativeElement`.
+     *
+     * @param element The passed element for this directive.
+     */
+    public constructor(element: ElementRef) {
+        if (element) {
+            this.nativeElement = <HTMLElement>element.nativeElement;
+        }
+    }
+
+    /**
+     * Initializes the listener for resizing events of the passed element.
+     */
+    public ngOnInit(): void {
+        // tslint:disable-next-line:no-unused-expression
+        new ResizeSensor(this.nativeElement, () => {
+            this.checkElementForChanges();
+        });
+        this.checkElementForChanges();
+    }
+
+    /**
+     * Function to check, if the height of the passed element changed
+     * and if the new height is different to the old one.
+     *
+     * If the new height is different to the old one, the subject gets a new value.
+     */
+    private checkElementForChanges(): void {
+        if (this.nativeElement.scrollHeight === this.oldHeight) {
+            return;
+        }
+
+        this.oldHeight = this.nativeElement.scrollHeight;
+
+        if (this.osHeightResizing) {
+            this.osHeightResizing.next(this.nativeElement.scrollHeight);
+        }
+    }
+}

client/src/app/shared/shared.module.ts

@@ -102,6 +102,7 @@ import { OverlayComponent } from 'app/site/common/components/overlay/overlay.com
 import { PreviewComponent } from './components/preview/preview.component';
 import { PdfViewerModule } from 'ng2-pdf-viewer';
 import { GlobalSpinnerComponent } from 'app/site/common/components/global-spinner/global-spinner.component';
+import { HeightResizingDirective } from './directives/height-resizing.directive';
 
 /**
  * Share Module for all "dumb" components and pipes.
@@ -223,6 +224,7 @@ import { GlobalSpinnerComponent } from 'app/site/common/components/global-spinne
         ProjectorButtonComponent,
         ProjectionDialogComponent,
         ResizedDirective,
+        HeightResizingDirective,
         MetaTextBlockComponent,
         ProjectorComponent,
         SlideContainerComponent,
@@ -290,7 +292,8 @@ import { GlobalSpinnerComponent } from 'app/site/common/components/global-spinne
         GlobalSpinnerComponent,
         SuperSearchComponent,
         OverlayComponent,
-        PreviewComponent
+        PreviewComponent,
+        HeightResizingDirective
     ],
     providers: [
         { provide: DateAdapter, useClass: OpenSlidesDateAdapter },

client/src/app/site/motions/modules/motion-detail/components/motion-comments/motion-comments.component.html

@@ -2,6 +2,7 @@
     <os-meta-text-block
         *ngIf="sectionVisible(section)"
         [showActionRow]="canEditSection(section) || comments[section.id].comment"
+        [disableExpandControl]="isCommentEdited(section)"
         icon="comment"
     >
         <ng-container class="meta-text-block-title">

client/src/app/site/motions/modules/motion-detail/components/motion-poll/motion-poll.component.html

@@ -1,4 +1,4 @@
-<os-meta-text-block showActionRow="true">
+<os-meta-text-block showActionRow="true" [disableExpandControl]="true">
     <ng-container class="meta-text-block-title">
         <span translate>Voting result</span>
         <span *ngIf="pollIndex">&nbsp;({{ pollIndex + 1 }})</span>

client/src/app/site/motions/modules/motion-detail/components/personal-note/personal-note.component.html

@@ -1,4 +1,4 @@
-<os-meta-text-block showActionRow="true" icon="speaker_notes">
+<os-meta-text-block showActionRow="true" icon="speaker_notes" [disableExpandControl]="true">
     <!-- Title row -->
     <ng-container class="meta-text-block-title">
         <span translate>Personal note</span>

client/src/app/site/projector/components/projector-list-entry/projector-list-entry.component.html

@@ -1,4 +1,4 @@
-<os-meta-text-block showActionRow="false" *ngIf="projector">
+<os-meta-text-block showActionRow="false" *ngIf="projector" [disableExpandControl]="true">
     <ng-container class="meta-text-block-title">
         {{ projector.getTitle() | translate }}
     </ng-container>
@@ -35,7 +35,11 @@
                 <h3 translate>Resolution and size</h3>
                 <!-- Aspect ratio field -->
                 <mat-radio-group formControlName="aspectRatio" [name]="projector.id">
-                    <mat-radio-button *ngFor="let ratio of aspectRatiosKeys" [value]="ratio" (change)="aspectRatioChanged($event)">
+                    <mat-radio-button
+                        *ngFor="let ratio of aspectRatiosKeys"
+                        [value]="ratio"
+                        (change)="aspectRatioChanged($event)"
+                    >
                         {{ ratio }}
                     </mat-radio-button>
                 </mat-radio-group>
@@ -53,7 +57,11 @@
 
                 <!-- projection defaults -->
                 <h3 translate>Projection defaults</h3>
-                <mat-select formControlName="projectiondefaults_id" placeholder="{{ 'Projection defaults' | translate }}" [multiple]="true">
+                <mat-select
+                    formControlName="projectiondefaults_id"
+                    placeholder="{{ 'Projection defaults' | translate }}"
+                    [multiple]="true"
+                >
                     <mat-option *ngFor="let pd of projectionDefaults" [value]="pd.id">
                         {{ pd.getTitle() | translate }}
                     </mat-option>
@@ -71,7 +79,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('color', '#000000')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('color', '#000000')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>
@@ -88,7 +100,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('background_color', '#ffffff')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('background_color', '#ffffff')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>
@@ -105,7 +121,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('header_background_color', '#317796')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('header_background_color', '#317796')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>
@@ -122,7 +142,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('header_font_color', '#f5f5f5')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('header_font_color', '#f5f5f5')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>
@@ -139,7 +163,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('header_h1_color', '#317796')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('header_h1_color', '#317796')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>
@@ -156,7 +184,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('chyron_background_color', '#317796')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('chyron_background_color', '#317796')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>
@@ -173,7 +205,11 @@
                         </mat-form-field>
                     </div>
                     <div class="reset-button">
-                        <button mat-icon-button matTooltip="{{ 'Reset' | translate }}" (click)="resetField('chyron_font_color', '#ffffff')">
+                        <button
+                            mat-icon-button
+                            matTooltip="{{ 'Reset' | translate }}"
+                            (click)="resetField('chyron_font_color', '#ffffff')"
+                        >
                             <mat-icon>replay</mat-icon>
                         </button>
                     </div>

client/src/styles.scss

@@ -23,6 +23,7 @@
 @import './app/site/mediafiles/components/mediafile-list/mediafile-list.component.scss-theme.scss';
 @import './app/site/common/components/super-search/super-search.component.scss';
 @import './app/shared/components/rounded-input/rounded-input.component.scss';
+@import './app/shared/components/meta-text-block/meta-text-block.component.scss';
 
 /** fonts */
 @import './assets/styles/fonts.scss';
@@ -46,6 +47,7 @@ $narrow-spacing: (
     @include os-mediafile-list-theme($theme);
     @include os-super-search-style($theme);
     @include os-rounded-input-style($theme);
+    @include os-meta-text-block-style($theme);
 }
 
 /** Load projector specific SCSS values */
@@ -546,13 +548,6 @@ button.mat-menu-item.selected {
     margin-right: 8px !important;
 }
 
-.meta-text-block .mat-icon-button {
-    margin-top: -12px !important;
-}
-.meta-text-block .mat-icon-button mat-icon {
-    font-size: 18px;
-}
-
 /** helper classes for margin/padding */
 .spacer-top-3 {
     margin-top: 3px !important;