Add hotkey help dialog, auto-meta key for macOS

src-ui/src/app/components/app-frame/global-search/global-search.component.html

@@ -7,7 +7,6 @@
             autocomplete="off" spellcheck="false"
             [(ngModel)]="query" (ngModelChange)="this.queryDebounce.next($event)" (keydown)="searchInputKeyDown($event)" ngbDropdownAnchor>
         <div class="position-absolute top-50 end-0 translate-middle">
-            <span class="badge d-none d-lg-inline text-muted position-absolute top-50 start-100 translate-middle ms-n4 fw-normal">⌘K</span>
             @if (loading) {
                 <div class="spinner-border spinner-border-sm text-muted mt-1"></div>
             }

src-ui/src/app/components/app-frame/global-search/global-search.component.ts

@@ -87,12 +87,11 @@ export class GlobalSearchComponent implements OnInit {
   }
 
   ngOnInit() {
-    this.hotkeyService.addShortcut({ keys: 'meta.k' }).subscribe(() => {
-      this.searchInput.nativeElement.focus()
-    })
-    this.hotkeyService.addShortcut({ keys: 'control.k' }).subscribe(() => {
-      this.searchInput.nativeElement.focus()
-    })
+    this.hotkeyService
+      .addShortcut({ keys: 'control.k', description: $localize`Global search` })
+      .subscribe(() => {
+        this.searchInput.nativeElement.focus()
+      })
   }
 
   private search(query: string) {

src-ui/src/app/components/common/hotkey-dialog/hotkey-dialog.component.html

@@ -0,0 +1,23 @@
+<div class="modal-header">
+    <h4 class="modal-title" id="modal-basic-title">{{title}}</h4>
+    <button type="button" class="btn-close" aria-label="Close" (click)="close()"></button>
+</div>
+<div class="modal-body">
+    <table class="table">
+        <tbody>
+            @for (key of hotkeys.entries(); track key[0]) {
+                <tr>
+                  <td>{{ key[1] }}</td>
+                  <td class="d-flex justify-content-end">
+                    <kbd [innerHTML]="formatKey(key[0])"></kbd>
+                    @if (key[0].includes('control')) {
+                        &nbsp;(macOS&nbsp;<kbd [innerHTML]="formatKey(key[0], true)"></kbd>)
+                    }
+                  </td>
+                </tr>
+            }
+        </tbody>
+    </table>
+</div>
+<div class="modal-footer">
+</div>

src-ui/src/app/components/common/hotkey-dialog/hotkey-dialog.component.spec.ts

@@ -0,0 +1,35 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing'
+
+import { HotkeyDialogComponent } from './hotkey-dialog.component'
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap'
+
+describe('HotkeyDialogComponent', () => {
+  let component: HotkeyDialogComponent
+  let fixture: ComponentFixture<HotkeyDialogComponent>
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [HotkeyDialogComponent],
+      providers: [NgbActiveModal],
+    }).compileComponents()
+
+    fixture = TestBed.createComponent(HotkeyDialogComponent)
+    component = fixture.componentInstance
+    fixture.detectChanges()
+  })
+
+  it('should create', () => {
+    expect(component).toBeTruthy()
+  })
+
+  it('should support close', () => {
+    const closeSpy = jest.spyOn(component.activeModal, 'close')
+    component.close()
+    expect(closeSpy).toHaveBeenCalled()
+  })
+
+  it('should format keys', () => {
+    expect(component.formatKey('control.a')).toEqual('&#8963; + a') // ⌃ + a
+    expect(component.formatKey('control.a', true)).toEqual('&#8984; + a') // ⌘ + a
+  })
+})

src-ui/src/app/components/common/hotkey-dialog/hotkey-dialog.component.ts

@@ -0,0 +1,34 @@
+import { Component } from '@angular/core'
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap'
+
+const SYMBOLS = {
+  meta: '⌘', // ⌘
+  control: '⌃', // ⌃
+  shift: '⇧', // ⇧
+}
+
+@Component({
+  selector: 'pngx-hotkey-dialog',
+  templateUrl: './hotkey-dialog.component.html',
+  styleUrl: './hotkey-dialog.component.scss',
+})
+export class HotkeyDialogComponent {
+  public title: string = $localize`Keyboard shortcuts`
+  public hotkeys: Map<string, string> = new Map()
+
+  constructor(public activeModal: NgbActiveModal) {}
+
+  public close(): void {
+    this.activeModal.close()
+  }
+
+  public formatKey(key: string, macOS: boolean = false): string {
+    if (macOS) {
+      key = key.replace('control', 'meta')
+    }
+    return key
+      .split('.')
+      .map((k) => SYMBOLS[k] || k)
+      .join(' + ')
+  }
+}