giles
4308591982
Introduce 8 irreducible host FFI primitives that replace 40+ native DOM
and browser primitives:
host-global — access global object (window/document)
host-get — read property from host object
host-set! — write property on host object
host-call — call method on host object
host-new — construct host object
host-callback — wrap SX function as host callback
host-typeof — check host object type
host-await — await host promise
All DOM and browser operations are now expressible as SX library
functions built on these 8 primitives:
web/lib/dom.sx — createElement, querySelector, appendChild,
setAttribute, addEventListener, classList, etc.
web/lib/browser.sx — localStorage, history, fetch, setTimeout,
promises, console, matchMedia, etc.
The existing native implementations remain as fallback — the library
versions shadow them in transpiled code. Incremental migration: callers
don't change, only the implementation moves from out-of-band to in-band.
JS 957+1080, Python 744, OCaml 952 — zero regressions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
172 lines
4.9 KiB
Plaintext
172 lines
4.9 KiB
Plaintext
;; ==========================================================================
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;; browser.sx — Browser API library functions
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;;
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;; Location, history, storage, cookies, timers, fetch — all expressed
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;; using the host FFI primitives. Library functions, not primitives.
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;; ==========================================================================
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;; --------------------------------------------------------------------------
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;; Location & navigation
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;; --------------------------------------------------------------------------
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(define browser-location-href
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(fn ()
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(host-get (host-get (dom-window) "location") "href")))
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(define browser-location-pathname
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(fn ()
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(host-get (host-get (dom-window) "location") "pathname")))
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(define browser-location-origin
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(fn ()
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(host-get (host-get (dom-window) "location") "origin")))
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(define browser-same-origin?
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(fn (url)
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(starts-with? url (browser-location-origin))))
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(define browser-push-state
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(fn (state title url)
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(host-call (host-get (dom-window) "history") "pushState" state title url)))
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(define browser-replace-state
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(fn (state title url)
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(host-call (host-get (dom-window) "history") "replaceState" state title url)))
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(define browser-reload
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(fn ()
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(host-call (host-get (dom-window) "location") "reload")))
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(define browser-navigate
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(fn (url)
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(host-set! (host-get (dom-window) "location") "href" url)))
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;; --------------------------------------------------------------------------
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;; Storage
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;; --------------------------------------------------------------------------
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(define local-storage-get
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(fn (key)
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(host-call (host-get (dom-window) "localStorage") "getItem" key)))
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(define local-storage-set
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(fn (key val)
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(host-call (host-get (dom-window) "localStorage") "setItem" key val)))
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(define local-storage-remove
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(fn (key)
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(host-call (host-get (dom-window) "localStorage") "removeItem" key)))
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;; --------------------------------------------------------------------------
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;; Timers
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;; --------------------------------------------------------------------------
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(define set-timeout
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(fn (fn-val ms)
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(host-call (dom-window) "setTimeout" (host-callback fn-val) ms)))
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(define set-interval
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(fn (fn-val ms)
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(host-call (dom-window) "setInterval" (host-callback fn-val) ms)))
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(define clear-timeout
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(fn (id)
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(host-call (dom-window) "clearTimeout" id)))
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(define clear-interval
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(fn (id)
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(host-call (dom-window) "clearInterval" id)))
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(define request-animation-frame
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(fn (fn-val)
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(host-call (dom-window) "requestAnimationFrame" (host-callback fn-val))))
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;; --------------------------------------------------------------------------
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;; Fetch
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;; --------------------------------------------------------------------------
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(define fetch-request
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(fn (url opts)
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(host-call (dom-window) "fetch" url opts)))
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(define new-abort-controller
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(fn ()
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(host-new "AbortController")))
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(define controller-signal
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(fn (controller)
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(host-get controller "signal")))
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(define controller-abort
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(fn (controller)
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(host-call controller "abort")))
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;; --------------------------------------------------------------------------
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;; Promises
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;; --------------------------------------------------------------------------
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(define promise-then
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(fn (p on-resolve on-reject)
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(let ((cb-resolve (host-callback on-resolve))
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(cb-reject (if on-reject (host-callback on-reject) nil)))
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(if cb-reject
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(host-call (host-call p "then" cb-resolve) "catch" cb-reject)
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(host-call p "then" cb-resolve)))))
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(define promise-resolve
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(fn (val)
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(host-call (host-global "Promise") "resolve" val)))
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(define promise-delayed
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(fn (ms val)
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(host-new "Promise" (host-callback
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(fn (resolve)
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(set-timeout (fn () (host-call resolve "call" nil val)) ms))))))
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;; --------------------------------------------------------------------------
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;; Dialogs & media
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;; --------------------------------------------------------------------------
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(define browser-confirm
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(fn (msg) (host-call (dom-window) "confirm" msg)))
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(define browser-prompt
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(fn (msg default)
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(host-call (dom-window) "prompt" msg default)))
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(define browser-media-matches?
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(fn (query)
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(host-get (host-call (dom-window) "matchMedia" query) "matches")))
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;; --------------------------------------------------------------------------
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;; JSON
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;; --------------------------------------------------------------------------
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(define json-parse
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(fn (s)
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(host-call (host-global "JSON") "parse" s)))
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;; --------------------------------------------------------------------------
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;; Console
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;; --------------------------------------------------------------------------
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(define log-info
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(fn (msg)
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(host-call (host-global "console") "log" (str "[sx] " msg))))
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(define log-warn
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(fn (msg)
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(host-call (host-global "console") "warn" (str "[sx] " msg))))
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(define now-ms
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(fn ()
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(host-call (host-global "Date") "now")))
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