Reland: Files.app: add create directory operation to context menu of directory tree.

ui/file_manager/file_manager/foreground/js/ui/directory_tree.js

Index: ui/file_manager/file_manager/foreground/js/ui/directory_tree.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/directory_tree.js b/ui/file_manager/file_manager/foreground/js/ui/directory_tree.js
index b7159c5377b1a8e276e202c9dcaa53085ab88074..c5a2a27a0d68411a8953db3182b89cd451f47141 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/directory_tree.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/directory_tree.js
@@ -14,6 +14,25 @@
 var DirectoryItemTreeBaseMethods = {};
 
 /**
+ * Finds an item by entry and returns it.
+ * @param {!Entry} entry
+ * @return {DirectoryItem} null is returned if it's not found.
+ * @this {(DirectoryItem|DirectoryTree)}
+ */
+DirectoryItemTreeBaseMethods.getItemByEntry = function(entry) {
+  for (var i = 0; i < this.items.length; i++) {
+    var item = this.items[i];
+    if (!item.entry)
+      continue;
+    if (util.isSameEntry(item.entry, entry))
+      return item;
+    if (util.isDescendantEntry(item.entry, entry))
+      return item.getItemByEntry(entry);
+  }
+  return null;
+};
+
+/**
  * Finds a parent directory of the {@code entry} in {@code this}, and
  * invokes the DirectoryItem.selectByEntry() of the found directory.
  *
@@ -87,7 +106,7 @@ function DirectoryItem(label, tree) {
 
   item.label = label;
   return item;
-};
+}
 
 DirectoryItem.prototype = {
   __proto__: cr.ui.TreeItem.prototype,
@@ -162,6 +181,15 @@ DirectoryItem.prototype.updateSubElementsFromList = function(recursive) {
 };
 
 /**
+ * Calls DirectoryItemTreeBaseMethods.getItemByEntry().
+ * @param {!Entry} entry
+ * @return {DirectoryItem}
+ */
+DirectoryItem.prototype.getItemByEntry = function(entry) {
+  return DirectoryItemTreeBaseMethods.getItemByEntry.call(this, entry);
+};
+
+/**
  * Calls DirectoryItemTreeBaseMethods.updateSubElementsFromList().
  *
  * @param {!DirectoryEntry|!FakeEntry} entry The entry to be searched for. Can
@@ -967,6 +995,41 @@ cr.defineProperty(DirectoryTree, 'contextMenuForSubitems', cr.PropertyKind.JS);
 cr.defineProperty(DirectoryTree, 'contextMenuForRootItems', cr.PropertyKind.JS);
 
 /**
+ * Updates and selects new directory.
+ * @param {!DirectoryEntry} parentDirectory Parent directory of new directory.
+ * @param {!DirectoryEntry} newDirectory
+ */
+DirectoryTree.prototype.updateAndSelectNewDirectory = function(
+    parentDirectory, newDirectory) {
+  // Expand parent directory.
+  var parentItem = DirectoryItemTreeBaseMethods.getItemByEntry.call(
+      this, parentDirectory);
+  parentItem.expanded = true;
+
+  // If new directory is already added to the tree, just select it.
+  for (var i = 0; i < parentItem.items.length; i++) {
+    var item = parentItem.items[i];
+    if (util.isSameEntry(item.entry, newDirectory)) {
+      this.selectedItem = item;
+      return;
+    }
+  }
+
+  // Create new item, and add it.
+  var newDirectoryItem = new SubDirectoryItem(
+      newDirectory.name, newDirectory, parentItem, this);
+
+  var addAt = 0;
+  while (addAt < parentItem.items.length &&
+      parentItem.items[addAt].entry.name < newDirectory.name) {
+    addAt++;
+  }
+
+  parentItem.addAt(newDirectoryItem, addAt);
+  this.selectedItem = newDirectoryItem;
+};
+
+/**
  * Calls DirectoryItemTreeBaseMethods.updateSubElementsFromList().
  *
  * @param {boolean} recursive True if the all visible sub-directories are