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 ++++++++++++++++++++++++++++++++++++++++++++++++++
 js/slides.js           | 44 ++++++++++++++++++++++++++++++----------
 2 files changed, 87 insertions(+), 11 deletions(-)
 create mode 100644 js/slide-controller.js

(limited to '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);
+  }
+};
diff --git a/js/slides.js b/js/slides.js
index 20bb1bd..0faf06b 100644
--- a/js/slides.js
+++ b/js/slides.js
@@ -13,6 +13,7 @@ function SlideDeck() {
   this.prevSlide_ = 0;
   this.slides = [];
   this.config_ = null;
+  this.controller_ = null;
 
   this.getCurrentSlideFromHash_();
 
@@ -52,6 +53,9 @@ SlideDeck.prototype.getCurrentSlideFromHash_ = function() {
  * @private
  */
 SlideDeck.prototype.onDomLoaded_ = function(e) {
+  // Fade in deck.
+  document.body.classList.add('loaded');
+
   this.slides_ = document.querySelectorAll('slide:not([hidden]):not(.backdrop)');
 
   // If we're on a smartphone device, load phone.css.
@@ -148,11 +152,11 @@ SlideDeck.prototype.onBodyKeyDown_ = function(e) {
       document.body.classList.toggle('highlight-code');
       break;
 
-    case 78: // N
+    case 80: // P
       // If this slide contains notes, toggle them.
-      if (this.slides_[this.curSlide_].querySelector('.note')) {
+      //if (this.slides_[this.curSlide_].querySelector('.note')) {
         document.body.classList.toggle('with-notes');
-      }
+      //}
       break;
 
     case 27: // ESC
@@ -283,6 +287,10 @@ SlideDeck.prototype.loadConfig_ = function(config) {
       }
     };
   }
+
+  if (!!('enableSpeakerNotes' in settings) && settings.enableSpeakerNotes) {
+    this.controller_ = new SlideController(this);
+  }
 };
 
 /**
@@ -335,10 +343,17 @@ SlideDeck.prototype.buildNextItem_ = function() {
  */
 SlideDeck.prototype.prevSlide = function(opt_dontPush) {
   if (this.curSlide_ > 0) {
-    // Toggle off speaker notes and/or highlighted code if they're showing.
-    var bodyClassList = document.body.classList;
-    bodyClassList.remove('with-notes');
-    bodyClassList.remove('highlight-code');
+    // Toggle off speaker notes and/or highlighted code if they're showing
+    // when we advanced. If we're the speaker notes popup, leave this put.
+    if (this.controller_ && !window.opener) {
+      var bodyClassList = document.body.classList;
+      bodyClassList.remove('with-notes');
+      bodyClassList.remove('highlight-code');
+    }
+
+    if (this.controller_) {
+      this.controller_.sendMsg({slideDirection: SlideController.MOVE_LEFT});
+    }
 
     this.prevSlide_ = this.curSlide_;
     this.curSlide_--;
@@ -352,15 +367,22 @@ SlideDeck.prototype.prevSlide = function(opt_dontPush) {
  */
 SlideDeck.prototype.nextSlide = function(opt_dontPush) {
 
+  if (this.controller_) {
+    this.controller_.sendMsg({slideDirection: SlideController.MOVE_RIGHT});
+  }
+
   if (this.buildNextItem_()) {
     return;
   }
 
   if (this.curSlide_ < this.slides_.length - 1) {
-    // Toggle off speaker notes and/or highlighted code if they're showing.
-    var bodyClassList = document.body.classList;
-    bodyClassList.remove('with-notes');
-    bodyClassList.remove('highlight-code');
+    // Toggle off speaker notes and/or highlighted code if they're showing
+    // when we advanced. If we're the speaker notes popup, leave this put.
+    if (this.controller_ && !window.opener) {
+      var bodyClassList = document.body.classList;
+      bodyClassList.remove('with-notes');
+      bodyClassList.remove('highlight-code');
+    }
 
     this.prevSlide_ = this.curSlide_;
     this.curSlide_++;
-- 
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