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Create form with up to eight constructor parameters #38

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147 changes: 111 additions & 36 deletions src/WindowsFormsLifetime/FormProvider.cs
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Original file line number Diff line number Diff line change
@@ -1,42 +1,7 @@
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;

namespace WindowsFormsLifetime;

public interface IFormProvider
{
/// <summary>
/// Gets the requested form type and ensures it is created on the UI thread.
/// </summary>
/// <typeparam name="T">The form type to get.</typeparam>
/// <returns>An instance of the form, asynchronously.</returns>
Task<T> GetFormAsync<T>() where T : Form;

/// <summary>
/// Gets the requested form type and ensures it is created on the UI thread. Creates the form in the given scope.
/// </summary>
/// <typeparam name="T">The form type to get.</typeparam>
/// <param name="scope">The scope in which the form should be created.</param>
/// <returns>An instance of the form, asynchronously.</returns>
Task<T> GetFormAsync<T>(IServiceScope scope) where T : Form;

Task<Form> GetMainFormAsync();

/// <summary>
/// Gets the requested form type on the current thread. Should only be called on the UI thread. All scoped and transient dependencies will be disposed when the form is disposed.
/// </summary>
/// <typeparam name="T">The form type to get.</typeparam>
/// <returns>An instance of the form.</returns>
T GetForm<T>() where T : Form;

/// <summary>
/// Gets the requested form type on the current thread. Should only be called on the UI thread. Creates the form in the given scope.
/// </summary>
/// <typeparam name="T">The form type to get.</typeparam>
/// <param name="scope">The scope in which the form should be created.</param>
/// <returns>An instance of the form.</returns>
T GetForm<T>(IServiceScope scope) where T : Form;
}

public class FormProvider : IFormProvider
{
private readonly SemaphoreSlim _semaphore = new(1, 1);
Expand Down Expand Up @@ -67,6 +32,38 @@ public async Task<T> GetFormAsync<T>()
return form;
}

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1>(T1 param1) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2>(T1 param1, T2 param2) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2, T3>(T1 param1, T2 param2, T3 param3) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2, param3);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2, T3, T4>(T1 param1, T2 param2, T3 param3, T4 param4) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2, param3, param4);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2, T3, T4, T5>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2, param3, param4, param5);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2, T3, T4, T5, T6>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2, param3, param4, param5, param6);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2, T3, T4, T5, T6, T7>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6, T7 param7) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2, param3, param4, param5, param6, param7);

/// <inheritdoc />
public async Task<TForm> GetFormAsync<TForm, T1, T2, T3, T4, T5, T6, T7, T8>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6, T7 param7, T8 param8) where TForm : Form
=> await CreateFormAsyncWithParameters<TForm>(param1, param2, param3, param4, param5, param6, param7, param8);

public async Task<T> GetFormAsync<T>(IServiceScope scope) where T : Form
{
// We are throttling this because there is only one gui thread
Expand Down Expand Up @@ -110,8 +107,86 @@ public T GetForm<T>() where T : Form
return form;
}

/// <inheritdoc />
public TForm GetForm<TForm, T1>(T1 param1) where TForm : Form
=> CreateFormWithParameters<TForm>(param1);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2>(T1 param1, T2 param2) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2, T3>(T1 param1, T2 param2, T3 param3) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2, param3);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2, T3, T4>(T1 param1, T2 param2, T3 param3, T4 param4) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2, param3, param4);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2, T3, T4, T5>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2, param3, param4, param5);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2, T3, T4, T5, T6>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2, param3, param4, param5, param6);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2, T3, T4, T5, T6, T7>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6, T7 param7) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2, param3, param4, param5, param6, param7);

/// <inheritdoc />
public TForm GetForm<TForm, T1, T2, T3, T4, T5, T6, T7, T8>(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6, T7 param7, T8 param8) where TForm : Form
=> CreateFormWithParameters<TForm>(param1, param2, param3, param4, param5, param6, param7, param8);

public T GetForm<T>(IServiceScope scope) where T : Form
=> scope.ServiceProvider.GetService<T>();

public void Dispose() => _semaphore?.Dispose();

private TForm CreateFormWithParameters<TForm>(params object[] parameters) where TForm : Form
{
return CreateFormWithScope(scope => ActivatorUtilities.CreateInstance<TForm>(scope.ServiceProvider, parameters));
}

private TForm CreateFormWithScope<TForm>(Func<IServiceScope, TForm> formFactory) where TForm : Form
{
TForm form;
var scope = _serviceScopeFactory.CreateScope();
try
{
form = formFactory(scope);
if (form == null)
{
scope.Dispose();
}
else
{
form.Disposed += (_, _) => scope.Dispose();
}
}
catch
{
scope.Dispose();
throw;
}

return form;
}

private async Task<TForm> CreateFormAsyncWithParameters<TForm>(params object[] parameters) where TForm : Form
{
await _semaphore.WaitAsync();

try
{
var form = await _syncContextManager.SynchronizationContext.InvokeAsync(() =>
CreateFormWithParameters<TForm>(parameters));
return form;
}
finally
{
_semaphore.Release();
}
}
}
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