canvas.utils.nearestInDocumentOrder

[fnpeditor.git] / modules / documentCanvas / canvas / utils.js

diff --git a/modules/documentCanvas/canvas/utils.js b/modules/documentCanvas/canvas/utils.js
new file mode 100644 (file)
index 0000000..829b466
--- /dev/null
+++ b/modules/documentCanvas/canvas/utils.js
@@ -0,0 +1,26 @@
+define([
+'libs/jquery-1.9.1.min',
+], function($) {
+    
+'use strict';
+
+
+var nearestInDocumentOrder = function(selector, direction, element) {
+    var parents = $(element).parents(),
+        parent = parents.length ? $(parents[parents.length-1]) : element;
+
+    var adj = parent.find(selector).filter(function() {
+        return this.compareDocumentPosition(element) & (direction === 'above' ? Node.DOCUMENT_POSITION_FOLLOWING : Node.DOCUMENT_POSITION_PRECEDING);
+    });
+
+    if(adj.length) {
+        return adj[direction === 'above' ? adj.length-1 : 0];
+    }
+    return null;
+}
+
+return {
+    nearestInDocumentOrder: nearestInDocumentOrder
+};
+
+});