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/*
* Beamer Viewer, a web-based PDF presentation viewer
* Copyright 2018-2024 Euxane TRAN-GIRARD
* SPDX-License-Identifier: EUPL-1.2
*/
"use strict";
class Stage {
constructor(onReady, onNext, onPrevious) {
this.audienceScreen = null;
this.presenterScreen = null;
this.onReady = onReady;
this.eventHandlers = [
new KeyboardEventHandler(onNext, onPrevious),
new MouseClickEventHandler(onNext, onPrevious),
new TouchSwipeEventHandler(onNext, onPrevious)
];
}
start() {
this.projector = window.open(window.location.href, "_blank", "toolbar=0,location=0,menubar=0");
if (this.projector == null)
alert("Please allow pop-ups, then refresh this page.");
this.projector.addEventListener("load", () => {
this.audienceScreen = new Screen(this.projector, false, false);
this.presenterScreen = new Screen(window, true, true);
this._watchDetach();
this.onReady();
});
this._registerEventHandler(window);
this._registerEventHandler(this.projector);
}
setPage(page) {
this.audienceScreen.setPage(page);
this.presenterScreen.setPage(page);
}
_registerEventHandler(window) {
if (window == null) return;
this.eventHandlers
.forEach(eventHandler => eventHandler.register(window));
}
_watchDetach() {
window.addEventListener("beforeunload", () =>
this._setMessage(this.projector, "Controller detached")
);
this.projector.addEventListener("beforeunload", () =>
this._setMessage(window, "Viewer detached")
);
}
_setMessage(window, message) {
const messageBar = window.document.getElementById("message");
messageBar.textContent = message;
}
}
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