From 64c8d6328a9d0e4fe68a5899e3e8710342f3b7dd Mon Sep 17 00:00:00 2001
From: Eric Bidelman
Date: Tue, 17 Apr 2012 18:59:07 -0700
Subject: Basic presenter mode working

---
 js/slide-controller.js | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 js/slide-controller.js

(limited to 'js/slide-controller.js')

diff --git a/js/slide-controller.js b/js/slide-controller.js
new file mode 100644
index 0000000..e2f8bf2
--- /dev/null
+++ b/js/slide-controller.js
@@ -0,0 +1,54 @@
+function SlideController(slideDeck) {
+  this.deck_ = slideDeck;
+  this.win_ = null;
+
+  window.addEventListener('message', this.onMessage_.bind(this), false);
+
+  // Close popups if we reload the main window.
+  window.addEventListener('beforeunload', function(e) {
+    this.win_.close()
+  }.bind(this), false);
+
+  // Only open one new popup. The recursion popup opening!
+  if (!window.opener) {
+    this.win_ = window.open(location.href, 'mywindow');
+  }
+}
+
+SlideController.MOVE_LEFT = -1;
+SlideController.MOVE_RIGHT = 1;
+
+SlideController.prototype.onMessage_ = function(e) {
+  var data = e.data;
+
+  // It would be dope if FF implemented location.origin.
+  if (e.origin != location.protocol + '//' + location.host) {
+    alert('Someone tried to postMessage from an unknown origin');
+    return;
+  }
+
+  if (e.source.location.hostname != 'localhost') {
+    alert('Someone tried to postMessage from an unknown origin');
+    return;
+  }
+
+  if ('slideDirection' in data) {
+    if (data.slideDirection == SlideController.MOVE_LEFT) {
+      this.deck_.prevSlide();
+    } else {
+      this.deck_.nextSlide();
+    }
+  }
+};
+
+SlideController.prototype.sendMsg = function(msg) {
+  // // Send message to popup window.
+  // if (this.win_) {
+  //   this.win_.postMessage(msg, location.protocol + '//' + location.host);
+  // }
+  // Send message to main window.
+  if (window.opener) {
+    // It would be dope if FF implemented location.origin.
+    window.opener.postMessage(msg, location.protocol + '//' + location.host);
+  }
+};
-- 
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