From 4ac79e422129e654e48909017a50b066b2f587d1 Mon Sep 17 00:00:00 2001
From: pacien
Date: Fri, 24 Aug 2018 01:39:40 +0200
Subject: Handle click and touch events

---
 pointless/viewer/stage/stage.js | 76 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 pointless/viewer/stage/stage.js

(limited to 'pointless/viewer/stage/stage.js')

diff --git a/pointless/viewer/stage/stage.js b/pointless/viewer/stage/stage.js
new file mode 100644
index 0000000..e9a2d38
--- /dev/null
+++ b/pointless/viewer/stage/stage.js
@@ -0,0 +1,76 @@
+/*
+ * Pointless Viewer, a web-based Beamer presentation viewer
+ * Copyright (C) 2018 Pacien TRAN-GIRARD
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+"use strict";
+
+class Stage {
+  constructor(onReady, onNext, onPrevious) {
+    this.audienceScreen = null;
+    this.presenterScreen = null;
+
+    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.");
+
+    const self = this;
+    this.projector.addEventListener("load", function() {
+      self.audienceScreen = new Screen(self.projector, false, false);
+      self.presenterScreen = new Screen(window, true, true);
+      self._watchDetach();
+      onReady();
+    });
+
+    this.eventHandlers = [
+      new KeyboardEventHandler(onNext, onPrevious),
+      new MouseClickEventHandler(onNext, onPrevious),
+      new TouchSwipeEventHandler(onNext, onPrevious)
+    ];
+
+    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(function(eventHandler) {
+      eventHandler.register(window);
+    });
+  }
+
+  _watchDetach() {
+    const self = this;
+    window.addEventListener("beforeunload", function() {
+      self._setMessage(self.projector, "Controller detached");
+    });
+
+    this.projector.addEventListener("beforeunload", function() {
+      self._setMessage(window, "Viewer detached");
+    });
+  }
+
+  _setMessage(window, message) {
+    const messageBar = window.document.getElementById("message");
+    messageBar.textContent = message;
+  }
+}
-- 
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