feat: support using provided websockets in overlay websocket

Author: maihde

js/sigplot.js

@@ -2442,8 +2442,13 @@
  */
 
  overlay_websocket: function(wsurl, overrides, layerOptions) {
- m.log.debug("Overlay websocket: " + wsurl);
- var ws = new WebSocket(wsurl, "plot-data");
+ if (typeof wsurl === "string") {
+ m.log.debug("Overlay websocket: " + wsurl);
+ var ws = new WebSocket(wsurl, "plot-data");
+ } else {
+ m.log.debug("Using provided websocket");
+ var ws = wsurl;
+ }
  ws.binaryType = "arraybuffer";
 
  var plot = this;
@@ -2456,16 +2461,16 @@
 
  var layer_n = this.overlay_bluefile(hcb, layerOptions);
 
- ws.onopen = function(evt) {};
+ ws.addEventListener("open",  function(evt) {});
 
- ws.onmessage = (function(theSocket) {
+ ws.addEventListener("message", (function(theSocket) {
  return function(evt) {
  if (evt.data instanceof ArrayBuffer) {
  var data = hcb.createArray(evt.data);
  plot.push(layer_n, data);
  } else if (typeof evt.data === "string") {
  var Gx = plot._Gx;
- var hdr = Gx.lyr[layer_n].hcb;
+ var hdr = plot.get_layer(layer_n).hcb;
  if (!hdr) {
  m.log.warning("Couldn't find header for layer " + layer_n);
  }
@@ -2474,7 +2479,7 @@
  plot.push(layer_n, [], newHdr);
  }
  };
- })(ws);
+ })(ws));
 
  return layer_n;
  },