Merge pull request #866 from restorer/more-precise-preloader

1. More precise preloader for html5; 2. Fix font preloading in Safari.

lime/app/Preloader.hx

@@ -38,6 +38,8 @@ class Preloader #if flash extends Sprite #end {
 	private var loadedLibraries:Int;
 	private var loadedStage:Bool;
 	
+	private var itemsProgressLoaded:Int;
+	private var itemsProgressTotal:Int;
 	
 	public function new () {
 		
@@ -75,15 +77,32 @@ class Preloader #if flash extends Sprite #end {
 	
 	public function load ():Void {
 		
+		itemsProgressLoaded = 0;
+		itemsProgressTotal = 0;
+		
+		for (library in libraries) {
+			
+			itemsProgressTotal += library.computeProgressTotal ();
+			
+		}
+		
 		loadedLibraries = -1;
 		
 		for (library in libraries) {
 			
-			library.load ().onComplete (function (_) {
+			library.load ().onProgress (function (_, _) {
+				
+				updateItemsProgress();
+				
+			}).onComplete (function (_) {
 				
 				loadedLibraries++;
 				updateProgress ();
 				
+			}).onError (function (e) {
+				
+				trace(e);
+				
 			});
 			
 		}
@@ -120,7 +139,8 @@ class Preloader #if flash extends Sprite #end {
 	
 	private function updateProgress ():Void {
 		
-		update (loadedLibraries, libraries.length);
+		update (itemsProgressLoaded, itemsProgressTotal);
+		// update (loadedLibraries, libraries.length);
 		
 		if (#if flash loadedStage && #end loadedLibraries == libraries.length) {
 			
@@ -130,6 +150,12 @@ class Preloader #if flash extends Sprite #end {
 		
 	}
 	
+	private function updateItemsProgress ():Void {
+		
+		itemsProgressLoaded++;
+		updateProgress();
+		
+	}
 	
 	#if flash
 	private function current_onEnter (event:flash.events.Event):Void {

lime/text/Font.hx

@@ -446,8 +446,15 @@ class Font {
 		
 		this.name = name;
 		var font = name;
+		var ua = Browser.navigator.userAgent.toLowerCase();
 		
-		if (untyped (Browser.document).fonts && untyped (Browser.document).fonts.load) {
+		// When Safari reports that font is loaded, actually font IS NOT loaded.
+		// If you try to use this font immediately after preloader completes,
+		// default font will be used instead.
+		//
+		// We detect Safari, and use old font loading for it.
+		
+		if (!(ua.indexOf(" safari/") >= 0 && ua.indexOf(" chrome/") < 0) && untyped (Browser.document).fonts && untyped (Browser.document).fonts.load) {
 			
 			untyped (Browser.document).fonts.load ("1em '" + font + "'").then (function (_) {
 				

lime/utils/AssetLibrary.hx

@@ -373,6 +373,27 @@ class AssetLibrary {
 		
 	}
 	
+	public function computeProgressTotal ():Int {
+		
+		var result = 1;
+		
+			for (id in preload.keys ()) {
+				
+				switch (types.get (id)) {
+					
+					case BINARY, FONT, IMAGE, MUSIC, SOUND, TEXT:
+						
+						result++;
+					
+					default:
+					
+				}
+				
+			}
+		
+		return result;
+		
+	}
 	
 	public function load ():Future<AssetLibrary> {
 		
@@ -575,6 +596,7 @@ class AssetLibrary {
 	private function updateProgressLoaded ():Void {
 		
 		progressLoaded++;
+		promise.progress(progressLoaded, progressTotal);
 		
 		if (progressLoaded == progressTotal) {