factor out tintable SVGs into their own component, and use plain DOM onload rather than react synthetic events

src/components/views/elements/TintableSvg.js

@@ -0,0 +1,56 @@
+/*
+Copyright 2015 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+'use strict';
+
+var React = require('react');
+var ReactDOM = require("react-dom");
+var dis = require("../../../dispatcher");
+
+module.exports = React.createClass({
+    displayName: 'TintableSvg',
+
+    propTypes: {
+        src: React.PropTypes.string.isRequired,
+        width: React.PropTypes.string.isRequired,
+        height: React.PropTypes.string.isRequired,
+        className: React.PropTypes.string,
+    },
+
+    componentDidMount: function() {
+        // we can't use onLoad on object due to https://github.com/facebook/react/pull/5781
+        // so handle it with pure DOM instead
+        ReactDOM.findDOMNode(this).addEventListener('load', this.onLoad);
+    },
+
+    componentWillUnmount: function() {
+        ReactDOM.findDOMNode(this).removeEventListener('load', this.onLoad);
+    },
+
+    onLoad: function(event) {
+        dis.dispatch({ action: "svg_onload", svg: event.target });
+    },
+
+    render: function() {
+        return (
+            <object className={ "mx_TintableSvg " + this.props.className }
+                    type="image/svg+xml"
+                    data={ this.props.src }
+                    width={ this.props.width }
+                    height={ this.props.height }/>
+        );
+    }
+});