Add save-with-key-combo support to `AnnotationOmega`

Resolves #1838

src/sidebar/components/annotation-omega.js

@@ -99,10 +99,23 @@ function AnnotationOmega({
     }
   };
 
+  // Allow saving of annotation by pressing CMD/CTRL-Enter
+  const onKeyDown = event => {
+    if (isEmpty || !isEditing) {
+      return;
+    }
+    if ((event.metaKey || event.ctrlKey) && event.key === 'Enter') {
+      event.stopPropagation();
+      event.preventDefault();
+      onSave();
+    }
+  };
+
   const onToggleReplies = () => setCollapsed(annotation.id, !threadIsCollapsed);
 
   return (
-    <div className="annotation-omega">
+    /* eslint-disable-next-line jsx-a11y/no-static-element-interactions */
+    <div className="annotation-omega" onKeyDown={onKeyDown}>
       <AnnotationHeader
         annotation={annotation}
         isEditing={isEditing}

src/sidebar/components/test/annotation-omega-test.js

@@ -4,6 +4,7 @@ import { act } from 'preact/test-utils';
 
 import * as fixtures from '../../test/annotation-fixtures';
 
+import { checkAccessibility } from '../../../test-util/accessibility';
 import mockImportedComponents from '../../../test-util/mock-imported-components';
 import { waitFor } from '../../../test-util/wait';
 
@@ -230,6 +231,79 @@ describe('AnnotationOmega', () => {
 
         await waitFor(() => fakeFlash.error.called);
       });
+
+      describe('saving using shortcut-key combo', () => {
+        context('in editing mode with text or tag content populated', () => {
+          beforeEach(() => {
+            // Put into editing mode by presence of draft, and add some `text`
+            // so that the annotation is not seen as "empty"
+            const draft = fixtures.defaultDraft();
+            draft.text = 'bananas';
+            fakeStore.getDraft.returns(draft);
+          });
+
+          it('should save annotation if `CTRL+Enter` is typed', () => {
+            const wrapper = createComponent();
+
+            wrapper
+              .find('.annotation-omega')
+              .simulate('keydown', { key: 'Enter', ctrlKey: true });
+
+            assert.calledWith(
+              fakeAnnotationsService.save,
+              wrapper.props().annotation
+            );
+          });
+
+          it('should save annotation if `META+Enter` is typed', () => {
+            const wrapper = createComponent();
+
+            wrapper
+              .find('.annotation-omega')
+              .simulate('keydown', { key: 'Enter', metaKey: true });
+
+            assert.calledWith(
+              fakeAnnotationsService.save,
+              wrapper.props().annotation
+            );
+          });
+
+          it('should not save annotation if `META+g` is typed', () => {
+            // i.e. don't save on non-"Enter" keys
+            const wrapper = createComponent();
+
+            wrapper
+              .find('.annotation-omega')
+              .simulate('keydown', { key: 'g', metaKey: true });
+
+            assert.notCalled(fakeAnnotationsService.save);
+          });
+        });
+
+        context('empty or not in editing mode', () => {
+          it('should not save annotation if not in editing mode', () => {
+            fakeStore.getDraft.returns(null);
+            const wrapper = createComponent();
+
+            wrapper
+              .find('.annotation-omega')
+              .simulate('keydown', { key: 'Enter', metaKey: true });
+
+            assert.notCalled(fakeAnnotationsService.save);
+          });
+
+          it('should not save annotation if content is empty', () => {
+            fakeStore.getDraft.returns(fixtures.defaultDraft());
+            const wrapper = createComponent();
+
+            wrapper
+              .find('.annotation-omega')
+              .simulate('keydown', { key: 'Enter', ctrlKey: true });
+
+            assert.notCalled(fakeAnnotationsService.save);
+          });
+        });
+      });
     });
   });
 
@@ -391,5 +465,21 @@ describe('AnnotationOmega', () => {
 
       assert.isFalse(wrapper.find('AnnotationActionBar').exists());
     });
+
+    it(
+      'should pass a11y checks',
+      checkAccessibility([
+        {
+          content: () => createComponent(),
+        },
+        {
+          name: 'When editing',
+          content: () => {
+            setEditingMode(true);
+            return createComponent();
+          },
+        },
+      ])
+    );
   });
 });