Import jitsi/jitsi-meet-react#2f23d98

As an intermediate step on the path to merging jitsi-meet and
jitsi-meet-react, import the whole source code of jitsi-meet-react as it
stands at
2f23d98424
i.e. the lastest master at the time of this import. No modifications are
applied to the imported source code in order to preserve a complete
snapshot of it in the repository of jitsi-meet and, thus, facilitate
comparison later on. Consequently, the source code of jitsi-meet and/or
jitsi-meet-react may not work. For example, jitsi-meet's jshint may be
unable to parse jitsi-meet-react's source code.

react/features/toolbar/components/AbstractToolbarButton.js

@@ -0,0 +1,61 @@
+import React, { Component } from 'react';
+
+/**
+ * Abstract (base) class for a button in Toolbar.
+ *
+ * @abstract
+ */
+export default class AbstractToolbarButton extends Component {
+
+    /**
+     * Implements React's {@link Component#render()}.
+     *
+     * @inheritdoc
+     * @returns {ReactElement}
+     */
+    render() {
+        return this._renderButton(this._renderIcon());
+    }
+
+    /**
+     * Renders the icon of this Toolbar button.
+     *
+     * @param {string|ReactClass} type - The React Component type of the icon to
+     * be rendered.
+     * @protected
+     * @returns {ReactElement} The icon of this Toolbar button.
+     */
+    _renderIcon(type) {
+        const props = {};
+
+        'iconName' in this.props && (props.name = this.props.iconName);
+        'iconStyle' in this.props && (props.style = this.props.iconStyle);
+
+        return React.createElement(type, props);
+    }
+}
+
+/**
+ * AbstractToolbarButton component's property types.
+ *
+ * @static
+ */
+AbstractToolbarButton.propTypes = {
+
+    /**
+     * The name of the Icon of this AbstractToolbarButton.
+     */
+    iconName: React.PropTypes.string,
+
+    /**
+     * The style of the Icon of this AbstractToolbarButton.
+     */
+    iconStyle: React.PropTypes.object,
+    onClick: React.PropTypes.func,
+    style:
+        React.PropTypes.oneOfType([
+            React.PropTypes.array,
+            React.PropTypes.object
+        ]),
+    underlayColor: React.PropTypes.any
+};