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Add support for multiple tree roots

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This commit is contained in:
Patrik Svensson
2021-01-02 11:25:17 +01:00
committed by Patrik Svensson
parent 4bfb24bfcb
commit 1aa958ced3
4 changed files with 123 additions and 89 deletions
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43
src/Spectre.Console.Tests/Expectations/TreeTests.Should_Render_Tree_With_Multiple_Roots_Correctly.verified.txt Normal file
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@@ -0,0 +1,43 @@
├── Root node
│ ├── child1
│ │ ├── multiple
│ │ │ line 0
│ │ ├── multiple
│ │ │ line 1
│ │ ├── multiple
│ │ │ line 2
│ │ ├── multiple
│ │ │ line 3
│ │ ├── multiple
│ │ │ line 4
│ │ ├── multiple
│ │ │ line 5
│ │ ├── multiple
│ │ │ line 6
│ │ ├── multiple
│ │ │ line 7
│ │ ├── multiple
│ │ │ line 8
│ │ └── multiple
│ │ line 9
│ ├── child2
│ │ └── child2Child
│ │ └── Child 2 child
│ │ child
│ └── child3
│ └── single leaf
│ multiline
│ └── 2020 January
│ ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┐
│ │ Sun │ Mon │ Tue │ Wed │ Thu │ Fri │ Sat │
│ ├─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│ │ │ │ │ 1 │ 2 │ 3 │ 4 │
│ │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │
│ │ 12 │ 13 │ 14 │ 15 │ 16 │ 17 │ 18 │
│ │ 19 │ 20 │ 21 │ 22 │ 23 │ 24 │ 25 │
│ │ 26 │ 27 │ 28 │ 29 │ 30 │ 31 │ │
│ │ │ │ │ │ │ │ │
│ └─────┴─────┴─────┴─────┴─────┴─────┴─────┘
└── child2Child
└── Child 2 child
child

0
src/Spectre.Console.Tests/Expectations/TreeTests.Should_Render_Tree_Correctly.verified.txt → src/Spectre.Console.Tests/Expectations/TreeTests.Should_Render_Tree_With_Single_Root_Correctly.verified.txt
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106
src/Spectre.Console.Tests/Unit/TreeTests.cs
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@@ -1,9 +1,6 @@
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Shouldly;
using Spectre.Console.Rendering;
using Spectre.Console.Testing;
using VerifyXunit;
using Xunit;
@@ -14,77 +11,7 @@ namespace Spectre.Console.Tests.Unit
public class TreeTests
{
[Fact]
public void Should_Measure_Tree_Correctly()
{
// Given
var nestedChildren =
Enumerable.Range(0, 10)
.Select(x => new TreeNode(new Text($"multiple \n line {x}")));
var child3 = new TreeNode(new Text("child3"));
child3.AddChild(new TreeNode(new Text("single leaf\n multiline")));
var children = new List<TreeNode>
{
new(new Text("child1"), nestedChildren), new(new Text("child2")), child3,
};
var root = new TreeNode(new Text("Root node"), children);
var tree = new Tree(root);
// When
var measurement = ((IRenderable)tree).Measure(new RenderContext(Encoding.Unicode, false), 80);
// Then
measurement.Min.ShouldBe(17);
measurement.Max.ShouldBe(19);
}
[Fact]
public void Should_Measure_Tree_Correctly_With_Regard_To_Max_Width()
{
// Given
var root = new TreeNode(new Text("Root node"));
var currentNode = root;
foreach (var i in Enumerable.Range(0, 100))
{
var newNode = new TreeNode(new Text(string.Empty));
currentNode.AddChild(newNode);
currentNode = newNode;
}
var tree = new Tree(root);
// When
var measurement = ((IRenderable)tree).Measure(new RenderContext(Encoding.Unicode, false), 80);
// Then
measurement.Min.ShouldBe(400);
measurement.Max.ShouldBe(80);
}
[Fact]
public void Measure_Leaf_Dominated_Width()
{
// Given
var root = new TreeNode(new Text("Root node"));
var currentNode = root;
foreach (var i in Enumerable.Range(0, 10))
{
var newNode = new TreeNode(new Text(i.ToString()));
currentNode.AddChild(newNode);
currentNode = newNode;
}
var tree = new Tree(root);
// When
var measurement = ((IRenderable)tree).Measure(new RenderContext(Encoding.Unicode, false), 80);
// Then
measurement.Min.ShouldBe(41);
measurement.Max.ShouldBe(41);
}
[Fact]
public Task Should_Render_Tree_Correctly()
public Task Should_Render_Tree_With_Single_Root_Correctly()
{
// Given
var console = new FakeConsole(width: 80);
@@ -101,7 +28,34 @@ namespace Spectre.Console.Tests.Unit
child3.AddChild(child3Child);
var children = new List<TreeNode> { new(new Text("child1"), nestedChildren), child2, child3 };
var root = new TreeNode(new Text("Root node"), children);
var tree = new Tree(root);
var tree = new Tree().AddChild(root);
// When
console.Render(tree);
// Then
return Verifier.Verify(console.Output);
}
[Fact]
public Task Should_Render_Tree_With_Multiple_Roots_Correctly()
{
// Given
var console = new FakeConsole(width: 80);
var nestedChildren =
Enumerable.Range(0, 10)
.Select(x => new TreeNode(new Text($"multiple \n line {x}")));
var child2 = new TreeNode(new Text("child2"));
var child2Child = new TreeNode(new Text("child2Child"));
child2.AddChild(child2Child);
child2Child.AddChild(new TreeNode(new Text("Child 2 child\n child")));
var child3 = new TreeNode(new Text("child3"));
var child3Child = new TreeNode(new Text("single leaf\n multiline"));
child3Child.AddChild(new TreeNode(new Calendar(2020, 01)));
child3.AddChild(child3Child);
var children = new List<TreeNode> { new(new Text("child1"), nestedChildren), child2, child3 };
var root = new TreeNode(new Text("Root node"), children);
var tree = new Tree().AddChild(root).AddChild(child2Child);
// When
console.Render(tree);
@@ -116,7 +70,7 @@ namespace Spectre.Console.Tests.Unit
// Given
var console = new FakeConsole(width: 80);
var root = new TreeNode(new Text("Root node"), Enumerable.Empty<TreeNode>());
var tree = new Tree(root);
var tree = new Tree().AddChild(root);
// When
console.Render(tree);

63
src/Spectre.Console/Widgets/Tree.cs
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@@ -9,10 +9,8 @@ namespace Spectre.Console
/// <summary>
/// Representation of tree data.
/// </summary>
public sealed class Tree : Renderable
public sealed class Tree : Renderable, IHasTreeNodes
{
private readonly TreeNode _rootNode;
/// <summary>
/// Gets or sets the tree style.
/// </summary>
@@ -23,13 +21,20 @@ namespace Spectre.Console
/// </summary>
public TreeAppearance Appearance { get; set; } = TreeAppearance.Ascii;
/// <summary>
/// Gets the tree nodes.
/// </summary>
public List<TreeNode> Nodes { get; }
/// <inheritdoc/>
List<TreeNode> IHasTreeNodes.Children => Nodes;
/// <summary>
/// Initializes a new instance of the <see cref="Tree"/> class.
/// </summary>
/// <param name="rootNode">Root node of the tree to be rendered.</param>
public Tree(TreeNode rootNode)
public Tree()
{
_rootNode = rootNode ?? throw new ArgumentNullException(nameof(rootNode));
Nodes = new List<TreeNode>();
}
/// <inheritdoc />
@@ -59,20 +64,52 @@ namespace Spectre.Console
return new Measurement(currentMin, Math.Min(currentMax, maxWidth));
}
return MeasureAtDepth(context, maxWidth, _rootNode, depth: 0);
if (Nodes.Count == 1)
{
return MeasureAtDepth(context, maxWidth, Nodes[0], depth: 0);
}
else
{
var root = new TreeNode(Text.Empty);
foreach (var node in Nodes)
{
root.AddChild(node);
}
return MeasureAtDepth(context, maxWidth, root, depth: 0);
}
}
/// <inheritdoc />
protected override IEnumerable<Segment> Render(RenderContext context, int maxWidth)
{
return _rootNode
.Render(context, maxWidth)
.Concat(new List<Segment> { Segment.LineBreak })
.Concat(RenderChildren(context, maxWidth - Appearance.PartSize, _rootNode, depth: 0));
if (Nodes.Count == 1)
{
// Single root
return Nodes[0]
.Render(context, maxWidth)
.Concat(new List<Segment> { Segment.LineBreak })
.Concat(RenderChildren(context, maxWidth - Appearance.PartSize, Nodes[0], depth: 0));
}
else
{
// Multiple roots
var root = new TreeNode(Text.Empty);
foreach (var node in Nodes)
{
root.AddChild(node);
}
return Enumerable.Empty<Segment>()
.Concat(RenderChildren(
context, maxWidth - Appearance.PartSize, root,
depth: 0));
}
}
private IEnumerable<Segment> RenderChildren(RenderContext context, int maxWidth, TreeNode node, int depth,
int? trailingStarted = null)
private IEnumerable<Segment> RenderChildren(
RenderContext context, int maxWidth, TreeNode node,
int depth, int? trailingStarted = null)
{
var result = new List<Segment>();
foreach (var (_, _, lastChild, childNode) in node.Children.Enumerate())