iframe-proxy

elringus · 2026-06-05T22:06:39Z

This adds CS and JSCtor parameters to [SpecializeImport] attribute, allowing to splice C# code into the generated C# proxy and JS code into the constructor of the generated JS proxy opening more ways to customize the specialized type behavior.

Also, when Decl start with export it will now replace the entire TypeScript declaration instead of splicing the content at the bottom of the default declaration.

These features, along with several fixes allow advanced specialization scenarios, for example turning properties of specific type into events on the JS side:

bootsharp/src/js/test/cs/Test.Library/Specialization.cs

Lines 60 to 92 in c4feb06

    
           [SpecializeImport(typeof(Event<>), 
        
               CS: 
        
               """ 
        
               protected override object Unwrap () { 
        
                   if (Event != null) return Event; 
        
                   ImportedByEvent.Add(Event = new(), this); 
        
                   Subscribe(Event.Broadcast); 
        
                   return Event; 
        
               } 
        
               """, 
        
               JSCtor: 
        
               """ 
        
               const event = new Event(); 
        
               event._id = _id; 
        
               this.subscribe(event.broadcast.bind(event)); 
        
               return event;  
        
               """, 
        
               Decl: 
        
               """ 
        
               export interface Event<T extends (...args: never[]) => void> { 
        
                   readonly last?: Parameters<T>; 
        
                   subscribe(handler: T): string; 
        
                   unsubscribe(handler: T): void; 
        
                   broadcast: T; 
        
               } 
        
               """)] 
        
           public abstract class EventImport<T> (int id) : SpecializedImport(id) where T : Delegate 
        
           { 
        
               protected internal static readonly ConditionalWeakTable<Event<T>, SpecializedImport> ImportedByEvent = new(); 
        
               protected Event<T>? Event; 
        
               public abstract void Subscribe (T handler); 
        
           }

Documentation: https://bootsharp.com/guide/specialization#injecting-code

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codecov · 2026-06-05T22:09:44Z

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elringus added 3 commits June 5, 2026 12:07

bump

ae14973

implement

c4feb06

update docs

c32a84a

chatgpt-codex-connector Bot reviewed Jun 5, 2026

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Comment thread src/cs/Bootsharp.Common/Attributes/SpecializeImportAttribute.cs

fmt

dbbe6b2

chatgpt-codex-connector Bot reviewed Jun 6, 2026

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Comment thread src/cs/Bootsharp.Common/Interop/Instances.cs

fix node not unique on generic rename

f70a139

elringus force-pushed the feat/custom-event branch from b2815ab to f70a139 Compare June 6, 2026 21:31

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Comment thread src/cs/Bootsharp.Publish/Common/Inspection/Meta/TypeMeta.cs

fix nullable generic value type syntax

835fb2f

elringus merged commit f9342a1 into main Jun 7, 2026
8 of 10 checks passed

elringus deleted the feat/custom-event branch June 7, 2026 12:10

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feat: improve specialization#215
elringus merged 6 commits into
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feat/custom-event

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	[SpecializeImport(typeof(Event<>),
	CS:
	"""
	protected override object Unwrap () {
	if (Event != null) return Event;
	ImportedByEvent.Add(Event = new(), this);
	Subscribe(Event.Broadcast);
	return Event;
	}
	""",
	JSCtor:
	"""
	const event = new Event();
	event._id = _id;
	this.subscribe(event.broadcast.bind(event));
	return event;
	""",
	Decl:
	"""
	export interface Event<T extends (...args: never[]) => void> {
	readonly last?: Parameters<T>;
	subscribe(handler: T): string;
	unsubscribe(handler: T): void;
	broadcast: T;
	}
	""")]
	public abstract class EventImport<T> (int id) : SpecializedImport(id) where T : Delegate
	{
	protected internal static readonly ConditionalWeakTable<Event<T>, SpecializedImport> ImportedByEvent = new();
	protected Event<T>? Event;

	public abstract void Subscribe (T handler);
	}

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