events.js

import { dispatch } from "./dispatch.js";
import { addDropUpload } from "./events/addDropUpload.js";
import { addVerticalBar } from "./events/addVerticalBar.js";

const trigger = (e) => e.composedPath()[0];
const matchesTrigger = (e, selectorString) =>
  trigger(e).matches(selectorString);
// create on listener
export const createListener =
  (target) => (eventName, selectorString, event) => {
    // focus doesn't work with this, focus doesn't bubble, need focusin
    target.addEventListener(eventName, (e) => {
      e.trigger = trigger(e); // Do I need this? e.target seems to work in many (all?) cases
      if (selectorString === "" || matchesTrigger(e, selectorString)) event(e);
    });
  };

function hasSomeParentTheClass(element, classname) {
  if (element.className === "") return false;

  if (element.className.split(' ').indexOf(classname)>=0) return true;
  
  return element.parentNode && hasSomeParentTheClass(element.parentNode, classname);
}

export function addEvents(state) {
  const bodyListener = createListener(document.body);
  bodyListener("keydown", "", function (event) {
    const code = event.code;
    const mod = navigator.platform.startsWith("Mac")
      ? event.metaKey && !event.ctrlKey
      : event.ctrlKey && !event.metaKey;
    const active = document.activeElement;
    const isCM = active ? hasSomeParentTheClass(active, "code-container") : false;

    if (isCM && code === "KeyS" && !event.shiftKey && mod) {
      event.preventDefault();
      dispatch("SAVE");
    }
    
    if (code === "Enter" && (event.shiftKey || event.ctrlKey || event.metaKey)) {
      event.preventDefault();
      dispatch("RUN");
    }
  });

  bodyListener("click", ".docs-trigger", function (event) {
    dispatch("DOC_OPEN");
  });

  window.addEventListener("beforeunload", (event) => {
    if (state.stale) {
      event.preventDefault();
      return event.returnValue = "You have unsaved changes. Are you sure you want to leave?";
    }
  });

  addVerticalBar(state, bodyListener);
  // addNumberDragging(state, bodyListener);
  addDropUpload(state, bodyListener);
}