giles
b104663481
Core reactive primitives (signal, deref, reset!, swap!, computed, effect, batch, notify-subscribers, dispose-computed, with-island-scope, register-in-scope) moved to spec/signals.sx — pure SX, zero platform dependencies. Usable by any host: web, CLI, embedded, server, harness. Web extensions (marsh scopes, stores, event bridge, resource) remain in web/signals.sx, which now depends on spec/signals.sx. Updated all load paths: - hosts/ocaml/bin/sx_server.ml — loads spec/signals.sx before web/signals.sx - hosts/ocaml/bin/run_tests.ml — loads both in order - hosts/ocaml/browser/bundle.sh + sx-platform.js — loads core-signals.sx first - shared/sx/ocaml_bridge.py — loads spec/signals.sx before web extensions 1116/1116 OCaml tests pass. Browser reactive island preview works. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
98 lines
3.7 KiB
Plaintext
98 lines
3.7 KiB
Plaintext
;; ==========================================================================
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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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(define *store-registry* (dict))
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(define def-store :effects [mutation]
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(fn ((name :as string) (init-fn :as lambda))
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(let ((registry *store-registry*))
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(when (not (has-key? registry name))
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(set! *store-registry* (assoc registry name (cek-call init-fn nil))))
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(get *store-registry* name))))
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(define use-store :effects []
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(fn ((name :as string))
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(if (has-key? *store-registry* name)
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(get *store-registry* name)
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(error (str "Store not found: " name
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". Call (def-store ...) before (use-store ...).")))))
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(define clear-stores :effects [mutation]
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(fn ()
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(set! *store-registry* (dict))))
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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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