Renamed /src to /frontend

frontend/components/Tree/Tree.js

@@ -0,0 +1,68 @@
+var Tree = require('js-tree');
+var proto = Tree.prototype;
+
+proto.updateNodesPosition = function() {
+  var top = 1;
+  var left = 1;
+  var root = this.getIndex(1);
+  var self = this;
+
+  root.top = top++;
+  root.left = left++;
+
+  if(root.children && root.children.length) {
+    walk(root.children, root, left, root.node.collapsed);
+  }
+
+  function walk(children, parent, left, collapsed) {
+    var height = 1;
+    children.forEach(function(id) {
+      var node = self.getIndex(id);
+      if(collapsed) {
+        node.top = null;
+        node.left = null;
+      } else {
+        node.top = top++;
+        node.left = left;
+      }
+
+      if(node.children && node.children.length) {
+        height += walk(node.children, node, left+1, collapsed || node.node.collapsed);
+      } else {
+        node.height = 1;
+        height += 1;
+      }
+    });
+
+    if(parent.node.collapsed) parent.height = 1;
+    else parent.height = height;
+    return parent.height;
+  }
+};
+
+proto.move = function(fromId, toId, placement) {
+  if(fromId === toId || toId === 1) return;
+
+  var obj = this.remove(fromId);
+  var index = null;
+
+  if(placement === 'before') index = this.insertBefore(obj, toId);
+  else if(placement === 'after') index = this.insertAfter(obj, toId);
+  else if(placement === 'prepend') index = this.prepend(obj, toId);
+  else if(placement === 'append') index = this.append(obj, toId);
+
+  // todo: perf
+  this.updateNodesPosition();
+  return index;
+};
+
+proto.getNodeByTop = function(top) {
+  var indexes = this.indexes;
+  for(var id in indexes) {
+    if(indexes.hasOwnProperty(id)) {
+      if(indexes[id].top === top) return indexes[id];
+    }
+  }
+};
+
+module.exports = Tree;