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UniMobExtensions.cs
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UniMobExtensions.cs
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using System;
using System.Collections;
using System.Collections.Generic;
using Code.UiComponents;
using JetBrains.Annotations;
using UnityEngine.UIElements;
namespace UniMob.UIToolkit
{
public static class UniMobExtensions
{
private const string RenderExceptionClass = "render-exception";
public static void Render<T>([NotNull] this ListView listView, Lifetime lifetime, [NotNull] Func<IList<T>> sources, [NotNull] Func<T, UiComponent> func)
{
if (listView == null) throw new ArgumentNullException(nameof(listView));
if (sources == null) throw new ArgumentNullException(nameof(sources));
if (func == null) throw new ArgumentNullException(nameof(func));
var sourcesAtom = Atom.Computed(lifetime, sources);
listView.makeItem = MakeItem;
listView.destroyItem = DestroyItem;
listView.bindItem = BindItem;
listView.unbindItem = UnbindItem;
lifetime.Register(Dispose);
Atom.Reaction(lifetime, OnUpdate, OnException);
void OnUpdate()
{
listView.itemsSource = (IList) sourcesAtom.Value;
listView.RemoveFromClassList(RenderExceptionClass);
}
void OnException(Exception ex)
{
listView.AddToClassList(RenderExceptionClass);
}
void Dispose()
{
listView.makeItem = null;
listView.destroyItem = null;
listView.bindItem = null;
listView.unbindItem = null;
listView.itemsSource = Array.Empty<T>();
}
VisualElement MakeItem()
{
using var _ = Atom.NoWatch;
var element = new VisualElement();
element.userData = new UiComponentBuilder(lifetime, element);
return element;
}
void DestroyItem(VisualElement element)
{
using var _ = Atom.NoWatch;
if (element.userData is UiComponentBuilder builder)
{
builder.Dispose();
}
}
void BindItem(VisualElement element, int i)
{
using var _ = Atom.NoWatch;
if (element.userData is UiComponentBuilder builder)
{
builder.Build(func.Invoke(sourcesAtom.Value[i]));
}
}
void UnbindItem(VisualElement element, int i)
{
using var _ = Atom.NoWatch;
if (element.userData is UiComponentBuilder builder)
{
builder.Build(null);
}
}
}
public static void Render([NotNull] this VisualElement root, Lifetime lifetime, [NotNull] Func<UiComponent> func)
{
if (root == null) throw new ArgumentNullException(nameof(root));
if (func == null) throw new ArgumentNullException(nameof(func));
Render(new UiComponentBuilder(lifetime, root), lifetime, func);
}
public static void Render([NotNull] this UiComponentBuilder builder, Lifetime lifetime, [NotNull] Func<UiComponent> func)
{
if (builder == null) throw new ArgumentNullException(nameof(builder));
if (func == null) throw new ArgumentNullException(nameof(func));
Atom.Reaction(lifetime, func, OnUpdate, OnException);
void OnUpdate(UiComponent v)
{
builder.Build(v);
}
void OnException(Exception ex)
{
builder.Build(new ErrorComponent(ex));
}
}
public static void Render([NotNull] this TextElement text, Lifetime lifetime, [NotNull] Func<string> pull)
{
if (text == null) throw new ArgumentNullException(nameof(text));
if (pull == null) throw new ArgumentNullException(nameof(pull));
Atom.Reaction(lifetime, pull, OnUpdate, OnException);
void OnUpdate(string v)
{
text.text = v ?? string.Empty;
text.RemoveFromClassList(RenderExceptionClass);
}
void OnException(Exception ex)
{
text.text = ex.Message;
text.AddToClassList(RenderExceptionClass);
}
}
public static void Render([NotNull] this TextField textField, Lifetime lifetime, [NotNull] Func<string> pull)
{
if (textField == null) throw new ArgumentNullException(nameof(textField));
if (pull == null) throw new ArgumentNullException(nameof(pull));
Atom.Reaction(lifetime, pull, OnUpdate, OnException);
void OnUpdate(string v)
{
textField.value = v ?? string.Empty;
textField.RemoveFromClassList(RenderExceptionClass);
}
void OnException(Exception ex)
{
textField.value = ex.Message;
textField.AddToClassList(RenderExceptionClass);
}
}
public static void OnChange([NotNull] this TextField textField, Lifetime lifetime, [NotNull] Action<string> callback)
{
if (textField == null) throw new ArgumentNullException(nameof(textField));
if (callback == null) throw new ArgumentNullException(nameof(callback));
if (lifetime.IsDisposed)
{
return;
}
lifetime.Register(() => textField.UnregisterValueChangedCallback(Call));
textField.RegisterValueChangedCallback(Call);
void Call(ChangeEvent<string> evt)
{
using var _ = Atom.NoWatch;
callback.Invoke(evt.newValue);
}
}
public static void OnClick([NotNull] this Button button, Lifetime lifetime, [NotNull] Action callback)
{
if (button == null) throw new ArgumentNullException(nameof(button));
if (callback == null) throw new ArgumentNullException(nameof(callback));
if (lifetime.IsDisposed)
{
return;
}
lifetime.Register(() => button.clicked -= Call);
button.clicked += Call;
void Call()
{
using var _ = Atom.NoWatch;
callback.Invoke();
}
}
}
}