Add a "reload widget" button.

res/img/button-refresh.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 15.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="612px" height="612px" viewBox="0 90 612 612" enable-background="new 0 90 612 612" xml:space="preserve">
+<path stroke="#76CFA6"  fill="#76CFA6" stroke-width="40" stroke-miterlimit="10" d="M517.593,435.2c-9.204,0-17.093,7.053-17.811,16.257
+	c-8.247,99.33-91.8,176.786-193.401,176.786c-106.98,0-194.119-86.54-194.119-192.923c0-104.71,84.389-190.294,189.098-192.924
+	c2.75-0.12,4.901,2.032,4.901,4.781v60.124c0,15.061,16.614,24.146,29.404,16.137l114.989-80.444
+	c11.953-7.53,11.953-24.862,0-32.393l-114.869-79.369c-12.79-8.009-29.405,1.076-29.405,16.137v54.626
+	c0,2.629-2.032,4.781-4.661,4.781C176.929,209.286,76.522,310.649,76.522,435.32c0,126.225,102.917,228.424,229.858,228.424
+	c120.487,0,219.221-91.681,229.022-209.299C536.359,444.046,527.992,435.2,517.593,435.2L517.593,435.2z"/>
+</svg>

src/components/views/elements/AppTile.js

@@ -55,6 +55,7 @@ export default class AppTile extends React.Component {
         this._grantWidgetPermission = this._grantWidgetPermission.bind(this);
         this._revokeWidgetPermission = this._revokeWidgetPermission.bind(this);
         this._onPopoutWidgetClick = this._onPopoutWidgetClick.bind(this);
+        this._onReloadWidgetClick = this._onReloadWidgetClick.bind(this);
     }
 
     /**
@@ -519,6 +520,11 @@ export default class AppTile extends React.Component {
             { target: '_blank', href: this._getSafeUrl(), rel: 'noopener noreferrer'}).click();
     }
 
+    _onReloadWidgetClick(e) {
+        // Reload iframe in this way to avoid cross-origin restrictions
+        this.refs.appFrame.src = this.refs.appFrame.src;
+    }
+
     render() {
         let appTileBody;
 
@@ -606,6 +612,7 @@ export default class AppTile extends React.Component {
         const showPictureSnapshotButton = this._hasCapability('m.capability.screenshot') && this.props.show;
         const showPictureSnapshotIcon = 'img/camera_green.svg';
         const popoutWidgetIcon = 'img/button-new-window.svg';
+        const reloadWidgetIcon = 'img/button-refresh.svg';
         const windowStateIcon = (this.props.show ? 'img/minimize.svg' : 'img/maximize.svg');
 
         return (
@@ -624,6 +631,16 @@ export default class AppTile extends React.Component {
                         { this.props.showTitle && this._getTileTitle() }
                     </span>
                     <span className="mx_AppTileMenuBarWidgets">
+                        { /* Reload widget */ }
+                        { this.props.showReload && <TintableSvgButton
+                            src={reloadWidgetIcon}
+                            className="mx_AppTileMenuBarWidget mx_AppTileMenuBarWidgetPadding"
+                            title={_t('Reload widget')}
+                            onClick={this._onReloadWidgetClick}
+                            width="10"
+                            height="10"
+                        /> }
+
                         { /* Popout widget */ }
                         { this.props.showPopout && <TintableSvgButton
                             src={popoutWidgetIcon}
@@ -707,6 +724,11 @@ AppTile.propTypes = {
     showDelete: PropTypes.bool,
     // Optionally hide the popout widget icon
     showPopout: PropTypes.bool,
+    // Optionally show the reload widget icon
+    // This is not currently intended for use with production widgets. However
+    // it can be useful when developing persistent widgets in order to avoid
+    // having to reload all of riot to get new widget content.
+    showReload: PropTypes.bool,
     // Widget capabilities to allow by default (without user confirmation)
     // NOTE -- Use with caution. This is intended to aid better integration / UX
     // basic widget capabilities, e.g. injecting sticker message events.
@@ -726,6 +748,7 @@ AppTile.defaultProps = {
     showMinimise: true,
     showDelete: true,
     showPopout: true,
+    showReload: false,
     handleMinimisePointerEvents: false,
     whitelistCapabilities: [],
     userWidget: false,