import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/client/shared/components/splitter/draggable.js

@@ -0,0 +1,54 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const React = require("devtools/client/shared/vendor/react");
+const ReactDOM = require("devtools/client/shared/vendor/react-dom");
+const { DOM: dom, PropTypes } = React;
+
+const Draggable = React.createClass({
+  displayName: "Draggable",
+
+  propTypes: {
+    onMove: PropTypes.func.isRequired,
+    onStart: PropTypes.func,
+    onStop: PropTypes.func,
+    style: PropTypes.object,
+    className: PropTypes.string
+  },
+
+  startDragging(ev) {
+    ev.preventDefault();
+    const doc = ReactDOM.findDOMNode(this).ownerDocument;
+    doc.addEventListener("mousemove", this.onMove);
+    doc.addEventListener("mouseup", this.onUp);
+    this.props.onStart && this.props.onStart();
+  },
+
+  onMove(ev) {
+    ev.preventDefault();
+    // Use viewport coordinates so, moving mouse over iframes
+    // doesn't mangle (relative) coordinates.
+    this.props.onMove(ev.clientX, ev.clientY);
+  },
+
+  onUp(ev) {
+    ev.preventDefault();
+    const doc = ReactDOM.findDOMNode(this).ownerDocument;
+    doc.removeEventListener("mousemove", this.onMove);
+    doc.removeEventListener("mouseup", this.onUp);
+    this.props.onStop && this.props.onStop();
+  },
+
+  render() {
+    return dom.div({
+      style: this.props.style,
+      className: this.props.className,
+      onMouseDown: this.startDragging
+    });
+  }
+});
+
+module.exports = Draggable;