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Introduce IRunnable interface architecture with Fluent API (Phase 1) (#4405)
* Initial plan * Add IRunnable interface, Runnable base class, and RunnableSessionToken Co-authored-by: tig <585482+tig@users.noreply.github.com> * Add comprehensive parallelizable unit tests for IRunnable Co-authored-by: tig <585482+tig@users.noreply.github.com> * Add 41 more unit tests for comprehensive IRunnable coverage - Added ApplicationRunnableIntegrationTests with 29 integration tests covering Begin/End/Run lifecycle - Added RunnableEdgeCasesTests with 24 edge case and error condition tests - Tests cover event propagation, cancellation scenarios, nested runnables, result handling - Fixed App property not being set in Begin() method - Total test count increased from 23 to 64 tests for IRunnable functionality Co-authored-by: tig <585482+tig@users.noreply.github.com> * Fix parallel test failures in CI/CD - Fixed IsModal property to check RunnableSessionStack instead of just TopRunnable - Added "fake" driver parameter to Application.Init() in integration tests - Fixed Begin() to capture old IsModal value before pushing to stack - Moved App property assignment before stack operations to ensure proper state - Skipped 2 tests that use Run() with main loop (not suitable for parallel tests) - All 11,654 parallelizable tests now pass (4 skipped) Co-authored-by: tig <585482+tig@users.noreply.github.com> * Refactor Application with IRunnable and session management Modernized `Application` and `ApplicationImpl` by introducing `IRunnable` and `RunnableSessionToken` for improved session management. Deprecated legacy methods and added `Obsolete` attributes to indicate their removal. Simplified method bodies using expression-bodied members and null-coalescing assignments. Enhanced lifecycle management in `ApplicationImpl` by removing redundant code and improving `SessionStack` iteration. Introduced `IToplevelTransitionManager` to handle top-level state changes. Updated `Runnable<TResult>` to implement `IRunnable<TResult>` with lifecycle event handling for `IsRunning` and `IsModal` states. Improved result management during lifecycle transitions. Removed legacy classes like `SessionToken` and consolidated their functionality into the new constructs. Updated and expanded the test suite to cover `IRunnable` lifecycle events, `RunnableSessionToken` behavior, and integration with `Application`. Performed code cleanup, improved readability, and updated documentation with detailed remarks and examples. Added new unit tests for edge cases and lifecycle behavior. * Implement fluent API for Init/Run/Shutdown with automatic disposal - Changed Init() to return IApplication for fluent chaining - Changed Run<TRunnable>() to return IApplication (breaking change from TRunnable) - Changed Shutdown() to return object? (extracts and returns result from last Run<T>()) - Added FrameworkOwnedRunnable property to track runnable created by Run<T>() - Shutdown() automatically disposes framework-owned runnables - Created FluentExample demonstrating: Application.Create().Init().Run<ColorPickerView>().Shutdown() - Disposal semantics: framework creates → framework disposes; caller creates → caller disposes Co-authored-by: tig <585482+tig@users.noreply.github.com> * New Example: Demonstrates new Fluent API using ColorPicker Conditional compilation (`#if POST_4148`) to support both a new Fluent API and a traditional approach for running `ColorPickerView`. The Fluent API simplifies the application lifecycle with method chaining and automatic disposal, while the traditional approach retains explicit lifecycle management. Refactor `ColorPickerView` to support both approaches: - Add an `instructions` label for user guidance. - Replace `_okButton` and `_cancelButton` with local `Button` instances. - Use a new `ColorPicker` with enhanced styling options. Add a warning log for WIP issue (#4148) in `ApplicationImpl.Run.cs` to highlight limitations with non-`Toplevel` views as runnables. Update `Terminal.sln` to include the new `FluentExample` project with appropriate build configurations. Improve code readability with verbatim string literals and better alignment/indentation. * Introduce `RunnableWrapper` for making any View runnable Added the `RunnableWrapper<TView, TResult>` pattern to enable any `View` to be run as a blocking session with typed results, without requiring inheritance from `Runnable<TResult>` or implementation of `IRunnable<TResult>`. - Added `RunnableWrapperExample` project to demonstrate usage. - Introduced `ApplicationRunnableExtensions` and `ViewRunnableExtensions` for clean, type-safe APIs to run views with or without result extraction. - Updated `CodeSharingStrategy.md` to document reduced duplication using `#if POST_4148` directives. - Added `RunnableWrapper.md` with detailed documentation and examples. - Created runnable examples in `Program.cs` showcasing various use cases. - Improved maintainability by reducing code duplication by 86% and increasing shared code by 264%. - Gated all new functionality behind the `POST_4148` feature flag for backward compatibility. * Simplified `#if POST_4148` usage to reduce duplication and improve clarity. Refactored `RunnableWrapper` to use a parameterless constructor with `required` properties, ensuring type safety and better lifecycle management. Updated `AllViewsView` with new commands, improved generic handling, and enhanced logging. Refactored `ApplicationRunnableExtensions` and `ViewRunnableExtensions` for cleaner initialization and event handling. Enhanced `TestsAllViews` to handle required properties and constraints dynamically. Updated documentation to reflect new designs and provide clearer examples. Improved overall code readability, consistency, and maintainability while leveraging modern C# features. * Update docfx documentation for IRunnable architecture - Updated View.md with comprehensive IRunnable section - Interface-based architecture explanation - Fluent API patterns and examples - Disposal semantics ("whoever creates it, owns it") - Result extraction patterns - Lifecycle properties and CWP-compliant events - Marked legacy Modal Views section for clarity - Updated application.md with IRunnable deep dive - Key features and benefits - Fluent API patterns with method chaining - Disposal semantics table - Creating runnable views with examples - Lifecycle properties and events - RunnableSessionStack management - Updated IApplication interface documentation - Updated runnable-architecture-proposal.md - Marked Phase 1 as COMPLETE ✅ - Updated status to "Phase 1 Complete - Phase 2 In Progress" - Documented all implemented features - Added bonus features (fluent API, automatic disposal) - Included migration examples All documentation is now clear, concise, and complete relative to Phase 1 implementation. Co-authored-by: tig <585482+tig@users.noreply.github.com> --------- Co-authored-by: Tig <tig@users.noreply.github.com> Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: tig <585482+tig@users.noreply.github.com>
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165
Examples/RunnableWrapperExample/Program.cs
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165
Examples/RunnableWrapperExample/Program.cs
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// Example demonstrating how to make ANY View runnable without implementing IRunnable
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using Terminal.Gui.App;
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using Terminal.Gui.Drawing;
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using Terminal.Gui.ViewBase;
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using Terminal.Gui.Views;
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IApplication app = Application.Create ();
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app.Init ();
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// Example 1: Use extension method with result extraction
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var textField = new TextField { Width = 40, Text = "Default text" };
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textField.Title = "Enter your name";
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textField.BorderStyle = LineStyle.Single;
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var textRunnable = textField.AsRunnable (tf => tf.Text);
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app.Run (textRunnable);
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if (textRunnable.Result is { } name)
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{
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MessageBox.Query ("Result", $"You entered: {name}", "OK");
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}
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else
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{
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MessageBox.Query ("Result", "Canceled", "OK");
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}
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textRunnable.Dispose ();
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// Example 2: Use IApplication.RunView() for one-liner
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var selectedColor = app.RunView (
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new ColorPicker
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{
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Title = "Pick a Color",
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BorderStyle = LineStyle.Single
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},
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cp => cp.SelectedColor);
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MessageBox.Query ("Result", $"Selected color: {selectedColor}", "OK");
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// Example 3: FlagSelector with typed enum result
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var flagSelector = new FlagSelector<SelectorStyles>
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{
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Title = "Choose Styles",
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BorderStyle = LineStyle.Single
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};
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var flagsRunnable = flagSelector.AsRunnable (fs => fs.Value);
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app.Run (flagsRunnable);
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MessageBox.Query ("Result", $"Selected styles: {flagsRunnable.Result}", "OK");
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flagsRunnable.Dispose ();
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// Example 4: Any View without result extraction
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var label = new Label
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{
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Text = "Press Esc to continue...",
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X = Pos.Center (),
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Y = Pos.Center ()
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};
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var labelRunnable = label.AsRunnable ();
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app.Run (labelRunnable);
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// Can still access the wrapped view
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MessageBox.Query ("Result", $"Label text was: {labelRunnable.WrappedView.Text}", "OK");
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labelRunnable.Dispose ();
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// Example 5: Complex custom View made runnable
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var formView = CreateCustomForm ();
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var formRunnable = formView.AsRunnable (ExtractFormData);
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app.Run (formRunnable);
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if (formRunnable.Result is { } formData)
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{
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MessageBox.Query (
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"Form Results",
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$"Name: {formData.Name}\nAge: {formData.Age}\nAgreed: {formData.Agreed}",
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"OK");
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}
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formRunnable.Dispose ();
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app.Shutdown ();
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// Helper method to create a custom form
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View CreateCustomForm ()
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{
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var form = new View
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{
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Title = "User Information",
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BorderStyle = LineStyle.Single,
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Width = 50,
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Height = 10
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};
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var nameField = new TextField
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{
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Id = "nameField",
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X = 10,
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Y = 1,
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Width = 30
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};
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var ageField = new TextField
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{
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Id = "ageField",
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X = 10,
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Y = 3,
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Width = 10
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};
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var agreeCheckbox = new CheckBox
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{
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Id = "agreeCheckbox",
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Title = "I agree to terms",
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X = 10,
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Y = 5
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};
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var okButton = new Button
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{
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Title = "OK",
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X = Pos.Center (),
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Y = 7,
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IsDefault = true
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};
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okButton.Accepting += (s, e) =>
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{
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form.App?.RequestStop ();
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e.Handled = true;
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};
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form.Add (new Label { Text = "Name:", X = 2, Y = 1 });
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form.Add (nameField);
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form.Add (new Label { Text = "Age:", X = 2, Y = 3 });
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form.Add (ageField);
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form.Add (agreeCheckbox);
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form.Add (okButton);
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return form;
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}
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// Helper method to extract data from the custom form
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FormData ExtractFormData (View form)
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{
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var nameField = form.SubViews.FirstOrDefault (v => v.Id == "nameField") as TextField;
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var ageField = form.SubViews.FirstOrDefault (v => v.Id == "ageField") as TextField;
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var agreeCheckbox = form.SubViews.FirstOrDefault (v => v.Id == "agreeCheckbox") as CheckBox;
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return new FormData
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{
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Name = nameField?.Text ?? string.Empty,
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Age = int.TryParse (ageField?.Text, out int age) ? age : 0,
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Agreed = agreeCheckbox?.CheckedState == CheckState.Checked
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};
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}
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// Result type for custom form
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record FormData
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{
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public string Name { get; init; } = string.Empty;
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public int Age { get; init; }
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public bool Agreed { get; init; }
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}
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@@ -0,0 +1,15 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net8.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<LangVersion>latest</LangVersion>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\Terminal.Gui\Terminal.Gui.csproj" />
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</ItemGroup>
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</Project>
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