giles
fc2b5e502f
Lazy module loading (Step 5 piece 6 completion): - Add define-library wrappers + import declarations to 13 source .sx files - compile-modules.js generates module-manifest.json with dependency graph - compile-modules.js strips define-library/import before bytecode compilation (VM doesn't handle these as special forms) - sx-platform.js replaces hardcoded 24-file loadWebStack() with manifest-driven recursive loader — only downloads modules the page needs - Result: 12 modules loaded (was 24), zero errors, zero warnings - Fallback to full load if manifest missing VM transpilation prep (Step 6b): - Refactor lib/vm.sx: 20 accessor functions replace raw dict access - Factor out collect-n-from-stack, collect-n-pairs, pad-n-nils helpers - bootstrap_vm.py: transpiles 9 VM logic functions to OCaml - sx_vm_ref.ml: proof that vm.sx transpiles (preamble has stubs) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
95 lines
3.4 KiB
Plaintext
95 lines
3.4 KiB
Plaintext
(import (sx dom))
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(import (sx browser))
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(define-library (sx signals-web)
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(export with-marsh-scope dispose-marsh-scope emit-event on-event bridge-event resource)
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(begin
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;; ==========================================================================
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;; web/signals.sx — Web platform signal extensions
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;;
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;; Extends the core reactive signal spec (spec/signals.sx) with web-specific
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;; features: marsh scopes (DOM lifecycle), named stores (page-level state),
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;; event bridge (lake→island communication), and async resources.
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;;
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;; These depend on platform primitives:
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;; dom-set-data, dom-get-data, dom-listen, dom-dispatch, event-detail,
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;; promise-then
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;; ==========================================================================
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;; --------------------------------------------------------------------------
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;; Marsh scopes — child scopes within islands
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;; --------------------------------------------------------------------------
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(define with-marsh-scope :effects [mutation io]
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(fn (marsh-el (body-fn :as lambda))
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(let ((disposers (list)))
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(with-island-scope
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(fn (d) (append! disposers d))
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body-fn)
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(dom-set-data marsh-el "sx-marsh-disposers" disposers))))
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(define dispose-marsh-scope :effects [mutation io]
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(fn (marsh-el)
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(let ((disposers (dom-get-data marsh-el "sx-marsh-disposers")))
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(when disposers
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(for-each (fn ((d :as lambda)) (cek-call d nil)) disposers)
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(dom-set-data marsh-el "sx-marsh-disposers" nil)))))
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;; --------------------------------------------------------------------------
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;; Named stores — page-level signal containers
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;; --------------------------------------------------------------------------
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;; def-store, use-store, clear-stores are now OCaml primitives
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;; (sx_primitives.ml) with a global mutable registry that survives
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;; env scoping across bytecode modules and island hydration.
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;; --------------------------------------------------------------------------
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;; Event bridge — DOM event communication for lake→island
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;; --------------------------------------------------------------------------
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(define emit-event :effects [io]
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(fn (el (event-name :as string) detail)
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(dom-dispatch el event-name detail)))
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(define on-event :effects [io]
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(fn (el (event-name :as string) (handler :as lambda))
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(dom-on el event-name handler)))
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(define bridge-event :effects [mutation io]
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(fn (el (event-name :as string) (target-signal :as signal) transform-fn)
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(effect (fn ()
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(let ((remove (dom-on el event-name
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(fn (e)
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(let ((detail (event-detail e))
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(new-val (if transform-fn
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(cek-call transform-fn (list detail))
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detail)))
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(reset! target-signal new-val))))))
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remove)))))
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;; --------------------------------------------------------------------------
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;; Resource — async signal with loading/resolved/error states
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;; --------------------------------------------------------------------------
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(define resource :effects [mutation io]
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(fn ((fetch-fn :as lambda))
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(let ((state (signal (dict "loading" true "data" nil "error" nil))))
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(promise-then
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(cek-call fetch-fn nil)
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(fn (data)
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(reset! state (dict "loading" false "data" data "error" nil)))
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(fn (err)
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(reset! state (dict "loading" false "data" nil "error" err))))
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state)))
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))
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;; Re-export to global env
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(import (sx signals-web))
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