reworking bindings

src/Bindings/DomBinding/util.js

@@ -0,0 +1,26 @@
+
+export function iterateUntilUndeleted (item) {
+  while (item !== null && item._deleted) {
+    item = item._right
+  }
+  return item
+}
+
+export function removeAssociation (domBinding, dom, type) {
+  domBinding.domToType.delete(dom)
+  domBinding.typeToDom.delete(type)
+}
+
+export function createAssociation (domBinding, dom, type) {
+  domBinding.domToType.set(dom, type)
+  domBinding.typeToDom.set(type, dom)
+}
+
+function insertNodeHelper (yxml, prevExpectedNode, child) {
+  let insertedNodes = yxml.insertDomElementsAfter(prevExpectedNode, [child])
+  if (insertedNodes.length > 0) {
+    return insertedNodes[0]
+  } else {
+    return prevExpectedNode
+  }
+}