Function workerCodeBody

chapter24/docs/d3-graphviz.js:1798–1841

(port)

  /* c8 ignore start */

  function workerCodeBody(port) {
    self.document = {}; // Workaround for "ReferenceError: document is not defined" in hpccWasm

    port.addEventListener('message', function (event) {
      var hpccWasm = self["@hpcc-js/wasm"];
      if (hpccWasm == undefined && event.data.vizURL) {
        importScripts(event.data.vizURL);
        hpccWasm = self["@hpcc-js/wasm"];
        // This is an alternative workaround where wasmFolder() is not needed
        //                                    document = {currentScript: {src: event.data.vizURL}};
      }
      if (event.data.type == "version") {
        hpccWasm.Graphviz.load().then(function (graphviz) {
          port.postMessage({
            type: "version",
            version: graphviz.version()
          });
        });
        return;
      }
      hpccWasm.Graphviz.load().then(function (graphviz) {
        var svg = graphviz.layout(event.data.dot, "svg", event.data.engine, event.data.options);
        if (svg) {
          port.postMessage({
            type: "done",
            svg: svg
          });
        } else if (event.data.vizURL) {
          port.postMessage({
            type: "init"
          });
        } else {
          port.postMessage({
            type: "skip"
          });
        }
      })["catch"](function (error) {
        port.postMessage({
          type: "error",
          error: error.message
        });
      });
    });
  }
  function workerCode() {
    var port = self;
    workerCodeBody(port);