Fix reply button on media modal not giving focus to compose form (#17626)

* Avoid compose form and modal management fighting for focus

* Fix reply button on media modal footer not giving focus to compose form

app/javascript/mastodon/features/compose/components/compose_form.js

@@ -163,8 +163,13 @@ class ComposeForm extends ImmutablePureComponent {
         selectionStart = selectionEnd;
       }
 
-      this.autosuggestTextarea.textarea.setSelectionRange(selectionStart, selectionEnd);
-      this.autosuggestTextarea.textarea.focus();
+      // Because of the wicg-inert polyfill, the activeElement may not be
+      // immediately selectable, we have to wait for observers to run, as
+      // described in https://github.com/WICG/inert#performance-and-gotchas
+      Promise.resolve().then(() => {
+        this.autosuggestTextarea.textarea.setSelectionRange(selectionStart, selectionEnd);
+        this.autosuggestTextarea.textarea.focus();
+      }).catch(console.error);
     } else if(prevProps.isSubmitting && !this.props.isSubmitting) {
       this.autosuggestTextarea.textarea.focus();
     } else if (this.props.spoiler !== prevProps.spoiler) {

app/javascript/mastodon/features/picture_in_picture/components/footer.js

@@ -60,7 +60,7 @@ class Footer extends ImmutablePureComponent {
     const { router } = this.context;
 
     if (onClose) {
-      onClose();
+      onClose(true);
     }
 
     dispatch(replyCompose(status, router.history));

app/javascript/mastodon/features/ui/components/modal_root.js

@@ -45,6 +45,7 @@ export default class ModalRoot extends React.PureComponent {
     type: PropTypes.string,
     props: PropTypes.object,
     onClose: PropTypes.func.isRequired,
+    ignoreFocus: PropTypes.bool,
   };
 
   state = {
@@ -79,7 +80,7 @@ export default class ModalRoot extends React.PureComponent {
     return <BundleModalError {...props} onClose={onClose} />;
   }
 
-  handleClose = () => {
+  handleClose = (ignoreFocus = false) => {
     const { onClose } = this.props;
     let message = null;
     try {
@@ -89,7 +90,7 @@ export default class ModalRoot extends React.PureComponent {
       // isn't set.
       // This would be much smoother with react-intl 3+ and `forwardRef`.
     }
-    onClose(message);
+    onClose(message, ignoreFocus);
   }
 
   setModalRef = (c) => {
@@ -97,12 +98,12 @@ export default class ModalRoot extends React.PureComponent {
   }
 
   render () {
-    const { type, props } = this.props;
+    const { type, props, ignoreFocus } = this.props;
     const { backgroundColor } = this.state;
     const visible = !!type;
 
     return (
-      <Base backgroundColor={backgroundColor} onClose={this.handleClose}>
+      <Base backgroundColor={backgroundColor} onClose={this.handleClose} ignoreFocus={ignoreFocus}>
         {visible && (
           <BundleContainer fetchComponent={MODAL_COMPONENTS[type]} loading={this.renderLoading(type)} error={this.renderError} renderDelay={200}>
             {(SpecificComponent) => <SpecificComponent {...props} onChangeBackgroundColor={this.setBackgroundColor} onClose={this.handleClose} ref={this.setModalRef} />}

app/javascript/mastodon/features/ui/containers/modal_container.js

@@ -3,22 +3,23 @@ import { openModal, closeModal } from '../../../actions/modal';
 import ModalRoot from '../components/modal_root';
 
 const mapStateToProps = state => ({
-  type: state.getIn(['modal', 0, 'modalType'], null),
-  props: state.getIn(['modal', 0, 'modalProps'], {}),
+  ignoreFocus: state.getIn(['modal', 'ignoreFocus']),
+  type: state.getIn(['modal', 'stack', 0, 'modalType'], null),
+  props: state.getIn(['modal', 'stack', 0, 'modalProps'], {}),
 });
 
 const mapDispatchToProps = dispatch => ({
-  onClose (confirmationMessage) {
+  onClose (confirmationMessage, ignoreFocus = false) {
     if (confirmationMessage) {
       dispatch(
         openModal('CONFIRM', {
           message: confirmationMessage.message,
           confirm: confirmationMessage.confirm,
-          onConfirm: () => dispatch(closeModal()),
+          onConfirm: () => dispatch(closeModal(undefined, { ignoreFocus })),
         }),
       );
     } else {
-      dispatch(closeModal());
+      dispatch(closeModal(undefined, { ignoreFocus }));
     }
   },
 });