added pooling to export (files.js)...

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

ui/files.js

@@ -843,8 +843,6 @@ function exportImagesTo(path, im_name, dir_name, size){
 	var z = (('10e' + (selection.length + '').length) * 1 + '').slice(2)
 
 	var queue = []
-	var pool = []
-	var pool_size = 10
 
 	// go through ribbons...
 	for(var i=DATA.ribbons.length-1; i >= 0; i--){
@@ -868,10 +866,61 @@ function exportImagesTo(path, im_name, dir_name, size){
 		path = normalizePath(path +'/'+ dir_name)
 	}
 
+	/*
+	var res = []
 	// XXX pool this...
 	queue.forEach(function(e){
-		exportImageTo.apply(null, e)
+		res.push(exportImageTo.apply(null, e))
 	})
+
+	return $.when.apply(null, res)
+		.done(function(){
+			showStatusQ('Export: done.')
+		})
+	*/
+
+	// XXX make this generic...
+	var pool = []
+	var pool_size = 100
+	var res = $.Deferred()
+
+	var enqueue = function(e){
+		if(e == null){
+			return
+		}
+		var worker = exportImageTo.apply(null, e)
+			.done(function(){
+				// remove self from pool...
+				var i = pool.indexOf(worker)
+
+				// get the next queue item...
+				var next = queue.splice(0, 1)[0]
+
+				// enqueue the next worker if it exists...
+				if(next != null){
+					pool[i] = enqueue(next)
+
+				// nothing in queue...
+				} else {
+					// remove self...
+					pool.splice(i, 1)
+
+					// empty queue and empty pool mean we are done...
+					if(pool.length == 0){
+						showStatusQ('Export: done.')
+						res.resolve()
+					}
+				}
+			})
+			.fail(function(){
+				var i = pool.indexOf(worker)
+				// remove self...
+				pool.splice(i, 1)
+			})
+		return worker
+	}
+	pool = queue.splice(0, pool_size).map(enqueue)
+	return res
 }