Refactor clipboard to use native clipboard API

frontend/src/app/components/clipboard/clipboard.component.ts

@@ -1,6 +1,4 @@
-import { Component, ViewChild, ElementRef, AfterViewInit, Input, ChangeDetectionStrategy } from '@angular/core';
-import * as ClipboardJS from 'clipboard';
-import * as tlite from 'tlite';
+import { Component, Input, ChangeDetectionStrategy, ChangeDetectorRef } from '@angular/core';
 
 @Component({
   selector: 'app-clipboard',
@@ -8,15 +6,14 @@ import * as tlite from 'tlite';
   styleUrls: ['./clipboard.component.scss'],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class ClipboardComponent implements AfterViewInit {
-  @ViewChild('btn') btn: ElementRef;
-  @ViewChild('buttonWrapper') buttonWrapper: ElementRef;
+export class ClipboardComponent {
   @Input() button = false;
   @Input() class = 'btn btn-secondary ml-1';
   @Input() size: 'small' | 'normal' | 'large' = 'normal';
   @Input() text: string;
   @Input() leftPadding = true;
   copiedMessage: string = $localize`:@@clipboard.copied-message:Copied!`;
+  showMessage = false;
 
   widths = {
     small: '10',
@@ -24,22 +21,40 @@ export class ClipboardComponent implements AfterViewInit {
     large: '18',
   };
 
-  clipboard: any;
+  constructor(
+    private cd: ChangeDetectorRef,
+  ) { }
 
-  constructor() { }
-
-  ngAfterViewInit() {
-    this.clipboard = new ClipboardJS(this.btn.nativeElement);
-    this.clipboard.on('success', () => {
-      tlite.show(this.buttonWrapper.nativeElement);
-      setTimeout(() => {
-        tlite.hide(this.buttonWrapper.nativeElement);
-      }, 1000);
-    });
+  async copyText() {
+    if (this.text && !this.showMessage) {
+      try {
+        await this.copyToClipboard(this.text);
+        this.showMessage = true;
+        this.cd.markForCheck();
+        setTimeout(() => {
+          this.showMessage = false;
+          this.cd.markForCheck();
+        }, 1000);
+      } catch (error) {
+        console.error('Clipboard copy failed:', error);
+      }
+    }
   }
 
-  onDestroy() {
-    this.clipboard.destroy();
+  async copyToClipboard(text: string) {
+    if (navigator.clipboard) {
+      await navigator.clipboard.writeText(text);
+    } else {
+      // Use the 'out of viewport hidden text area' trick on non-secure contexts
+      const textarea = document.createElement('textarea');
+      textarea.value = this.text;
+      textarea.style.opacity = '0';
+      textarea.setAttribute('readonly', 'true'); // Don't trigger keyboard on mobile
+      document.body.appendChild(textarea);
+      textarea.select();
+      document.execCommand('copy');
+      textarea.remove();
+    }
   }
 
 }