Sticky workspace YAML config

src/Whim.Yaml.Tests/YamlLoader/YamlLoader_LoadWorkspacesTests.cs

@@ -1,5 +1,6 @@
 using System.Collections.Immutable;
 using FluentAssertions;
+using NSubstitute;
 using Whim.SliceLayout;
 using Whim.TestUtils;
 using Xunit;
@@ -149,4 +150,72 @@ public void Load_NoWorkspaces(string config, bool isYaml, IContext ctx)
 		IWorkspace[] workspaces = YamlLoaderTestUtils.GetWorkspaces(ctx)!;
 		Assert.Empty(workspaces);
 	}
+
+	public static TheoryData<string, bool> WorkspacesMonitorConfig =>
+		new()
+		{
+			{
+				"""
+					workspaces:
+					  entries:
+					    - name: workspace1
+					      monitors: [0, 1]
+					    - name: workspace2
+					      monitors: [2]
+					    - name: workspace3
+					      monitors: []
+					""",
+				true
+			},
+			{
+				"""
+					{
+						"workspaces": {
+							"entries": [
+								{
+									"name": "workspace1",
+									"monitors": [0, 1]
+								},
+								{
+									"name": "workspace2",
+									"monitors": [2]
+								},
+								{
+									"name": "workspace3",
+									"monitors": []
+								}
+							]
+						}
+					}
+					""",
+				false
+			},
+		};
+
+	[Theory, MemberAutoSubstituteData<YamlLoaderCustomization>(nameof(WorkspacesMonitorConfig))]
+	internal void Load_WorkspacesWithMonitors(string config, bool isYaml, IContext ctx)
+	{
+		// Given a valid config with workspaces and monitor indices
+		YamlLoaderTestUtils.SetupFileConfig(ctx, config, isYaml);
+
+		// When loading the workspaces
+		bool result = YamlLoader.Load(ctx, showErrorWindow: false);
+
+		// Then the workspaces and monitor indices are loaded correctly
+		Assert.True(result);
+
+		// Verify the expected transforms were executed
+		var received = ctx.Store.ReceivedCalls().ToArray();
+		Assert.Equal(3, received.Length);
+
+		// Verify the monitor indices.
+		AddWorkspaceTransform[] transforms = received
+			.Select(c => c.GetArguments()[0])
+			.OfType<AddWorkspaceTransform>()
+			.ToArray();
+
+		transforms[0].MonitorIndices.Should().BeEquivalentTo([0, 1]);
+		transforms[1].MonitorIndices.Should().BeEquivalentTo([2]);
+		transforms[2].MonitorIndices.Should().BeEmpty();
+	}
 }

src/Whim.Yaml/YamlLoader.cs

@@ -129,12 +129,23 @@ private static void UpdateWorkspaces(IContext ctx, Schema schema)
 			string workspaceName = (string)workspace.Name;
 
 			CreateLeafLayoutEngine[]? engines = null;
+			List<int>? monitorIndices = null;
+
 			if (workspace.LayoutEngines.Entries.AsOptional() is Schema.RequiredEntries.RequiredTypeArray definedEngines)
 			{
 				engines = YamlLayoutEngineLoader.GetCreateLeafLayoutEngines(ctx, [.. definedEngines]);
 			}
 
-			ctx.Store.Dispatch(new AddWorkspaceTransform(workspaceName, engines));
+			if (workspace.Monitors.AsOptional() is Schema.RequiredName.MonitorsEntityArray definedMonitorIndices)
+			{
+				monitorIndices = [];
+				foreach (var monitorIndex in definedMonitorIndices)
+				{
+					monitorIndices.Add((int)monitorIndex);
+				}
+			}
+
+			ctx.Store.Dispatch(new AddWorkspaceTransform(workspaceName, engines, MonitorIndices: monitorIndices));
 		}
 	}
 

src/Whim.Yaml/schema.json

@@ -128,6 +128,14 @@
         "layout_engines": {
           "$ref": "#/$defs/LayoutEngineList",
           "description": "The layout engines to use for the workspace. If not specified, the layout engines in `layout_engines` will be used."
+        },
+        "monitors": {
+          "type": "array",
+          "items": {
+            "type": "integer",
+            "minimum": 0
+          },
+          "description": "The monitors which this workspace is restricted to. This is a 0-indexed list of monitor indices - see https://dalyisaac.github.io/Whim/configure/core/monitors.html. If not specified, this workspace will be available on all monitors."
         }
       }
     },