Merge pull request #4117 from gabrielschulhof/fix-dialog-double-hash-…

…try2

Fix dialog double hash try2

js/jquery.mobile.navigation.js

@@ -1003,6 +1003,16 @@ define( [
 		if( fromPage && fromPage[0] === toPage[0] && !settings.allowSamePageTransition ) {
 			isPageTransitioning = false;
 			mpc.trigger( "pagechange", triggerData );
+
+			// Even if there is no page change to be done, we should keep the urlHistory in sync with the hash changes
+			if( settings.fromHashChange ) {
+				urlHistory.directHashChange({
+					currentUrl:	url,
+					isBack:		function() {},
+					isForward:	function() {}
+				});
+			}
+
 			return;
 		}
 
@@ -1034,6 +1044,9 @@ define( [
 			}
 		} catch(e) {}
 
+		// Record whether we are at a place in history where a dialog used to be - if so, do not add a new history entry and do not change the hash either
+		var alreadyThere = false;
+
 		// If we're displaying the page as a dialog, we don't want the url
 		// for the dialog content to be used in the hash. Instead, we want
 		// to append the dialogHashKey to the url of the current page.
@@ -1042,6 +1055,17 @@ define( [
 			// be an empty string. Moving the undefined -> empty string back into
 			// urlHistory.addNew seemed imprudent given undefined better represents
 			// the url state
+
+			// If we are at a place in history that once belonged to a dialog, reuse
+			// this state without adding to urlHistory and without modifying the hash.
+			// However, if a dialog is already displayed at this point, and we're
+			// about to display another dialog, then we must add another hash and
+			// history entry on top so that one may navigate back to the original dialog
+			if ( active.url.indexOf( dialogHashKey ) > -1 && !$.mobile.activePage.is( ".ui-dialog" ) ) {
+				settings.changeHash = false;
+				alreadyThere = true;
+			}
+
 			url = ( active.url || "" ) + dialogHashKey;
 		}
 
@@ -1069,7 +1093,7 @@ define( [
 			|| ( isDialog ? $.mobile.defaultDialogTransition : $.mobile.defaultPageTransition );
 
 		//add page to history stack if it's not back or forward
-		if( !historyDir ) {
+		if( !historyDir && !alreadyThere ) {
 			urlHistory.addNew( url, settings.transition, pageTitle, pageUrl, settings.role );
 		}