fix(etherpad) fix loading Etherpad on web

Fixes: https://github.com/jitsi/jitsi-meet/issues/10486

react/features/etherpad/components/SharedDocumentButton.web.js

@@ -0,0 +1,109 @@
+// @flow
+
+import type { Dispatch } from 'redux';
+
+import { createToolbarEvent, sendAnalytics } from '../../analytics';
+import { translate } from '../../base/i18n';
+import { IconShareDoc } from '../../base/icons';
+import { connect } from '../../base/redux';
+import { AbstractButton, type AbstractButtonProps } from '../../base/toolbox/components';
+import { toggleDocument } from '../../etherpad/actions';
+
+
+type Props = AbstractButtonProps & {
+
+    /**
+     * Whether the shared document is being edited or not.
+     */
+    _editing: boolean,
+
+    /**
+     * Redux dispatch function.
+     */
+    dispatch: Dispatch<any>,
+};
+
+/**
+ * Implements an {@link AbstractButton} to open the chat screen on mobile.
+ */
+class SharedDocumentButton extends AbstractButton<Props, *> {
+    accessibilityLabel = 'toolbar.accessibilityLabel.document';
+    icon = IconShareDoc;
+    label = 'toolbar.documentOpen';
+    toggledLabel = 'toolbar.documentClose';
+
+    /**
+     * Dynamically retrieves tooltip based on sharing state.
+     */
+    get tooltip() {
+        if (this._isToggled()) {
+            return 'toolbar.documentClose';
+        }
+
+        return 'toolbar.documentOpen';
+    }
+
+    /**
+     * Required by linter due to AbstractButton overwritten prop being writable.
+     *
+     * @param {string} _value - The value.
+     */
+    set tooltip(_value) {
+        // Unused.
+    }
+
+    /**
+     * Handles clicking / pressing the button, and opens / closes the appropriate dialog.
+     *
+     * @private
+     * @returns {void}
+     */
+    _handleClick() {
+        const { _editing, dispatch, handleClick } = this.props;
+
+        if (handleClick) {
+            handleClick();
+
+            return;
+        }
+
+        sendAnalytics(createToolbarEvent(
+            'toggle.etherpad',
+            {
+                enable: !_editing
+            }));
+
+        dispatch(toggleDocument());
+    }
+
+    /**
+     * Indicates whether this button is in toggled state or not.
+     *
+     * @override
+     * @protected
+     * @returns {boolean}
+     */
+    _isToggled() {
+        return this.props._editing;
+    }
+}
+
+/**
+ * Maps part of the redux state to the component's props.
+ *
+ * @param {Object} state - The redux store/state.
+ * @param {Object} ownProps - The properties explicitly passed to the component
+ * instance.
+ * @returns {Object}
+ */
+function _mapStateToProps(state: Object, ownProps: Object) {
+    const { documentUrl, editing } = state['features/etherpad'];
+    const { visible = Boolean(documentUrl) } = ownProps;
+
+    return {
+        _editing: editing,
+        visible
+    };
+}
+
+export default translate(connect(_mapStateToProps)(SharedDocumentButton));