87 lines
3.3 KiB
C#
87 lines
3.3 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using JetBrains.Annotations;
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namespace UnityEditor.Searcher
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{
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// SearcherTreeUtility contains a helper function that takes a flat list of SearcherItems and constructs a SearcherItems tree using their names as paths.
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//
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// For example:
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// List<SearcherItem> items = new List<SearcherItem>();
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// items.Add(new SearcherItem("Fantasy/J. R. R. Tolkien/The Fellowship of the Ring"));
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// items.Add(new SearcherItem("Fantasy/J. R. R. Tolkien/The Two Towers"));
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// items.Add(new SearcherItem("Fantasy/J. R. R. Tolkien/The Return of the King"));
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// items.Add(new SearcherItem("Health & Fitness/Becoming a Supple Leopard"));
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// items.Add(new SearcherItem("Some Uncategorized Book"));
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//
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// List<SearcherItem> itemsTree = SearcherTreeUtility.CreateFromFlatList(items);
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//
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// Will return the follow hierarchy:
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// - Fantasy
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// - - J. R. R. Tolkien
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// - - - The Fellowship of the Ring
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// - - - The Two Towers
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// - - - The Return of the King
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// - Health & Fitness
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// - - Becoming a Supple Leopard
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// - Some Uncategorized Book
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//
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// Where the first level of SearcherItems is directly inside the list.
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// Note that this will also break the names into their final path component.
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[PublicAPI]
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public static class SearcherTreeUtility
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{
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public static List<SearcherItem> CreateFromFlatList(List<SearcherItem> items)
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{
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List<SearcherItem> searchList = new List<SearcherItem>();
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for (int i = 0; i < items.Count; ++i)
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{
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SearcherItem item = items[i];
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string[] pathParts = item.Name.Split('/');
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SearcherItem searchNode = FindNodeByName(searchList, pathParts[0]);
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if (searchNode == null)
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{
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searchNode = new SearcherItem(pathParts[0]);
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searchList.Add(searchNode);
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}
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AddItem(searchNode, item, pathParts);
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}
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return searchList;
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}
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private static void AddItem(SearcherItem root, SearcherItem item, string[] pathParts)
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{
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string itemFullPath = item.Name;
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string itemName = pathParts[pathParts.Length - 1];
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string currentPath = string.Empty;
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SearcherItem currentSearchNode = root;
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for (int i = 1; i < pathParts.Length; ++i)
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{
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SearcherItem node = FindNodeByName(currentSearchNode.Children, pathParts[i]);
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if (node == null)
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{
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node = new SearcherItem(pathParts[i]);
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currentSearchNode.AddChild(node);
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}
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currentSearchNode = node;
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}
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// Set the user data to the final node, which is guaranteed to correspond to the item.
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currentSearchNode.UserData = item.UserData;
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currentSearchNode.Icon = item.Icon;
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}
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private static SearcherItem FindNodeByName(IList<SearcherItem> searchList, string name)
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{
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for (int i = 0; i < searchList.Count; ++i)
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{
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if (searchList[i].Name.Equals(name))
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{
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return searchList[i];
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}
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}
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return null;
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}
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}
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}
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