Revert "Don't load images twice"

This is beyond the scope of this branch, I would leave this in, but there is a lot of strange code including commented code in this file, so I'm leaving it out. It would be a better idea to fix the whole file in another branch (or Tim might be fixing this file with the media fixes)

openlp/core/display/html/display.js

@@ -377,7 +377,9 @@ var Display = {
    * Reinitialise Reveal
    */
   reinit: function () {
-    Reveal.reinitialize();
+    Reveal.sync();
+    // Python expects to be on first page after reinit
+    Reveal.slide(0);
   },
   /**
    * Set the transition type
@@ -662,7 +664,6 @@ var Display = {
       Display.addTextSlide(slide.verse, slide.text, slide.footer, false);
     });
     Display.reinit();
-    Display.goToSlide(0);
   },
   /**
    * Create the <section> that will contain text slides (vertical slides in react)

openlp/core/display/html/reveal.js

@@ -441,14 +441,6 @@
 
 	}
 
-	/**
-	 * Restarts up the presentation if the client is capable.
-	 */
-    function reinitialize() {
-        initialized = false;
-        initialize(config);
-    }
-
 	/**
 	 * Inspect the client to see what it's capable of, this
 	 * should only happens once per runtime.
@@ -5814,7 +5806,6 @@
 		VERSION: VERSION,
 
 		initialize: initialize,
-		reinitialize: reinitialize,
 		configure: configure,
 
 		sync: sync,

openlp/core/display/window.py

@@ -201,11 +201,10 @@ class DisplayWindow(QtWidgets.QWidget):
         js_is_display = str(self.is_display).lower()
         self.run_javascript('Display.init({do_transitions});'.format(do_transitions=js_is_display))
         self._is_initialised = True
-        if self._can_show_startup_screen:
-            self.set_startup_screen()
-        # Make sure the scale is set if it was attempted set before init
         if self.scale != 1:
             self.set_scale(self.scale)
+        if self._can_show_startup_screen:
+            self.set_startup_screen()
 
     def run_javascript(self, script, is_sync=False):
         """

scripts/reveal-js.patch

@@ -1,25 +0,0 @@
---- reveal.js.orig	2018-08-01 10:37:51.000000000 +0200
-+++ reveal.js	2019-02-11 21:25:39.396198927 +0100
-@@ -383,6 +383,14 @@
- 	}
- 
- 	/**
-+	 * Restarts up the presentation if the client is capable.
-+	 */
-+    function reinitialize() {
-+        initialized = false;
-+        initialize(config);
-+    }
-+
-+	/**
- 	 * Inspect the client to see what it's capable of, this
- 	 * should only happens once per runtime.
- 	 */
-@@ -5372,6 +5380,7 @@
- 		VERSION: VERSION,
- 
- 		initialize: initialize,
-+		reinitialize: reinitialize,
- 		configure: configure,
- 
- 		sync: sync,

tests/js/test_display.js

@@ -113,10 +113,12 @@ describe("The Display object", function () {
     expect(Display.reinit).toBeDefined();
   });
 
-  it("should re-initialise Reveal when reinit is called", function () {
+  it("should sync Reveal and set to first slide when reinit is called", function () {
-    spyOn(Reveal, "reinitialize");
+    spyOn(Reveal, "sync");
+    spyOn(Reveal, "slide");
     Display.reinit();
-    expect(Reveal.reinitialize).toHaveBeenCalled();
+    expect(Reveal.sync).toHaveBeenCalled();
+    expect(Reveal.slide).toHaveBeenCalledWith(0);
   });
 
   it("should have a setTransition() method", function () {
@@ -562,7 +564,6 @@ describe("Display.setTextSlides", function () {
     ];
     spyOn(Display, "clearSlides");
     spyOn(Display, "reinit");
-    spyOn(Reveal, "slide");
 
     Display.setTextSlides(slides);
 
@@ -571,7 +572,6 @@ describe("Display.setTextSlides", function () {
     expect(Display._slides["v2"]).toEqual(1);
     expect($(".slides > section > section").length).toEqual(2);
     expect(Display.reinit).toHaveBeenCalledTimes(1);
-    expect(Reveal.slide).toHaveBeenCalledWith(0, 0);
   });
 
   it("should correctly set outline width", function () {