started tuning the order saving and caching...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

ui (gen4)/features/base.js

@@ -899,7 +899,7 @@ module.Base = core.ImageGridFeatures.Feature({
 			'flipHorizontal',
 			'flipVertical',
 		], 
-			function(_, target){ this.markChanged('images', [that.data.getImage(target)]) }],
+			function(_, target){ this.markChanged('images', [this.data.getImage(target)]) }],
 
 	],
 })

ui (gen4)/features/core.js

@@ -858,6 +858,8 @@ var ChangesActions = actions.Actions({
 			Mark item(s) of section as changed...
 			.markChanged(<section>, [<item>, .. ])
 
+		NOTE: when marking section items, the new items will be added to
+			the set of already marked items.
 		NOTE: when .changes is null (i.e. everything changed, marked via
 			.markChanged('all')) then calling this with anything other 
 			than 'none' will have no effect.
@@ -894,7 +896,7 @@ var ChangesActions = actions.Actions({
 
 			// section items...
 			} else if(items instanceof Array) {
-				changes[section] = (changes[section] || []).concat(items)
+				changes[section] = (changes[section] || []).concat(items).unique()
 				this.changes = changes
 
 			// section(s)...

ui (gen4)/features/sort.js

@@ -469,21 +469,34 @@ module.Sort = core.ImageGridFeatures.Feature({
 
 		['prepareIndexForWrite',
 			function(res){
-				var changed = this.changes == null 
-					|| this.changes.sort_cache
+				var c = this.changes
 
-				if(changed && res.raw.sort_order){
-					res.index['sort_order'] = res.raw.sort_order 
+				var save = function(attr){
+					if((c == null || c[attr]) && res.raw[attr]){
+						// full save...
+						if(c == null){
+							res.index[attr] = res.raw[attr] 
+
+						// build diff...
+						} else {
+							var diff = {}
+							c[attr].forEach(function(k){ diff[k] = res.raw[attr][k] })
+							res.index[attr +'-diff'] = diff
 						}
-				if(changed && res.raw.sort_cache){
-					res.index['sort_cache'] = res.raw.sort_cache 
 					}
+				}
+
+				save('sort_order')
+				save('sort_cache')
 			}],
 
 		// manage changes...
-		// XXX also need to mark 'sort_cache'
 		['sortImages',
 			function(_, target){ this.markChanged('data') }],
+		['saveOrder', 
+			function(_, title){ this.markChanged('sort_order', [title]) }],
+		['cacheOrder', 
+			function(){ this.markChanged('sort_cache', [this.data.sort_method]) }],
 	],
 })