camunda-modeler/client/lib/util/browser.js

Camunda Modeler for BPMN, DMN and CMMN, based on bpmn.io

'use strict';

var ipcRenderer = require('electron').ipcRenderer;


/**
 * Communicate with the Browser process.
 * Make sure that the callback is always called, even when there's an error.
 *
 * @param  {Event} event
 * @param  {Arguments} args
 * @param  {Function} callback
 */
function send(event, args, callback) {
  var _args = args;

  if (typeof arguments[arguments.length - 1] !== 'function') {
    _args = Array.prototype.slice.call(arguments).slice(1);
  }

  if (typeof args === 'function') {
    callback = args;
    _args = [];
  }

  if (callback) {
    ipcRenderer.once(event + ':response', function(evt, args) {

      if (args[0]) {
        return callback(new Error(args[0]));
      }

      callback.apply(null, args);
    });
  }

  ipcRenderer.send.apply(null, [ event ].concat(_args));
}

module.exports.send = send;


function on(event, callback) {
  ipcRenderer.on(event, callback);
}

module.exports.on = on;


function once(event, callback) {
  ipcRenderer.once(event, callback);
}

module.exports.once = once;