added a generic getWorkerQueue(...)...

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

ui/compatibility.js

@@ -361,13 +361,7 @@ if(window.CEF_dumpJSON != null){
 	window.makeImagesPreviewsQ = function(gids, sizes, mode){
 		gids = gids == null ? getClosestGIDs() : gids
 
-		// attach the the previous queue...
+		var queue = getWorkerQueue('preview_generator')
-		if(WORKERS.preview_generator == null){
-			var queue = makeDeferredsQ()
-			WORKERS.preview_generator = queue.start()
-		} else {
-			var queue = WORKERS.preview_generator
-		}
 
 		// attach the workers to the queue...
 		$.each(gids, function(_, gid){

ui/data.js

@@ -1179,6 +1179,25 @@ function getPrevLocation(){
 
 /********************************************************* Workers ***/
 
+// get/create a named worker queue...
+//
+function getWorkerQueue(name, no_auto_start){
+	// attach the the previous queue...
+	if(WORKERS[name] == null){
+		var queue = makeDeferredsQ()
+		WORKERS[name] = queue
+		if(!no_auto_start){
+			queue.start()
+		}
+	} else {
+		var queue = WORKERS[name]
+	}
+	return queue
+}
+
+
+// kill all worker queues...
+//
 function killAllWorkers(){
 	for(var k in WORKERS){
 		console.log('Worker: Stopping:', k)

ui/files.js

@@ -717,18 +717,10 @@ function updateImagesOrientation(gids, no_update_loaded){
 
 // queued version of updateImagesOrientation(...)
 //
-// XXX do we need to auto-stop this???
 function updateImagesOrientationQ(gids, no_update_loaded){
 	gids = gids == null ? getClosestGIDs() : gids
 
-	//var queue = makeDeferredsQ().start()
+	var queue = getWorkerQueue('image_orientation_reader')
-	// attach the the previous queue...
-	if(WORKERS.image_orientation_reader == null){
-		var queue = makeDeferredsQ()
-		WORKERS.image_orientation_reader = queue.start()
-	} else {
-		var queue = WORKERS.image_orientation_reader
-	}
 
 	var last = null