/
tilt.rkt
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/
tilt.rkt
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#lang s-exp "../js-vm/base.rkt"
(require "../js-vm/permissions/require-permission.rkt")
(require "../js-vm/ffi/ffi.rkt")
(require "../js-vm/jsworld/jsworld.rkt")
(require "in-phone.rkt")
(require "mock-tilt-setup.rkt")
(provide ;on-acceleration!
on-acceleration
;on-shake!
on-shake
;on-tilt!
on-tilt)
(require-permission "PERMISSION:TILT"
"PERMISSION:SHAKE")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Mocks
(define (mock-on-acceleration world-updater)
(make-world-config (lambda (on-acc)
(mock-acceleration-setup on-acc))
(lambda (shutdown-f)
(shutdown-f))
(lambda (w x y z)
(world-updater w
(prim-js->racket x)
(prim-js->racket y)
(prim-js->racket z)))))
(define (mock-on-tilt world-updater delay)
(make-world-config (lambda (on-acc)
(mock-tilt-setup on-acc))
(lambda (shutdown-f)
(shutdown-f))
(lambda (w x y z)
(world-updater w
(prim-js->racket x)
(prim-js->racket y)
(prim-js->racket z)))))
(define (mock-on-shake world-updater)
(make-world-config (lambda (on-acc)
(mock-shake-setup on-acc))
(lambda (shutdown-f)
(shutdown-f))
(lambda (w)
(world-updater w))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (phonegap-on-acceleration world-updater)
(let ([accelerometer (get-accelerometer)])
(make-world-config (lambda (success error)
(js-call (js-get-field accelerometer "watchAcceleration")
accelerometer
success
error))
(lambda (shutdown-f) (js-call shutdown-f #f))
(lambda (w js-x js-y js-z)
(let ([x (prim-js->racket js-x)]
[y (prim-js->racket js-y)]
[z (prim-js->racket js-z)])
(world-updater w x y z)))
(lambda (w e)
(error 'on-acceleration "an error occured with the accelerometer")))))
(define (phonegap-on-tilt world-updater delay)
(let ([accelerometer (get-accelerometer)]
[options (js-make-hash)])
(js-set-field! options
"frequency"
(racket->prim-js (* delay 1000)))
(make-world-config (lambda (on-change)
(let ([shutdown-f
(js-call (js-get-field
accelerometer
"watchOrientation")
accelerometer
on-change
js-undefined
options
)])
shutdown-f))
(lambda (shutdown-f)
(js-call shutdown-f #f))
;; on-change
(lambda (w js-azimuth js-pitch js-roll)
(let ([azimuth (prim-js->racket js-azimuth)]
[pitch (prim-js->racket js-pitch)]
[roll (prim-js->racket js-roll)])
(world-updater w azimuth pitch roll))))))
(define (phonegap-on-shake world-updater)
(let ([accelerometer (get-accelerometer)])
(make-world-config (lambda (success error)
(js-call (js-get-field accelerometer "watchShake")
accelerometer
success
error))
(lambda (shutdown-f) (js-call shutdown-f #f))
world-updater
(lambda (w e)
(error 'on-shake "an error occured with the accelerometer")))))
;; get-accelerometer: -> js-value
;; Gets the accelerometer object.
(define (get-accelerometer)
(let ([navigator (js-get-global-value "navigator")])
(js-get-field navigator "accelerometer")))
#;(define (on-acceleration! world-updater effect-updater)
(let ([accelerometer (js-new (js-get-field (js-get-global-value "phonegap") "Accelerometer"))])
(make-world-config (lambda (success error)
(js-call (js-get-field accelerometer "watchAcceleration")
accelerometer
success
error))
(lambda (shutdown-f) (js-call shutdown-f #f))
(lambda (w js-x js-y js-z)
(let ([x (prim-js->racket js-x)]
[y (prim-js->racket js-y)]
[z (prim-js->racket js-z)])
(world-with-effects (effect-updater w x y z)
(world-updater w x y z))))
(lambda (w e)
(error 'on-acceleration! "an error occured with the accelerometer")))))
#;(define (on-shake! world-updater effect-updater)
(let ([accelerometer (js-new (js-get-field (js-get-global-value "phonegap") "Accelerometer"))])
(make-world-config (lambda (success error)
(js-call (js-get-field accelerometer "watchShake")
accelerometer
success
error))
(lambda (shutdown-f) (js-call shutdown-f #f))
(lambda (w)
(world-with-effects (effect-updater w)
(world-updater w)))
(lambda (w e)
(error 'on-shake! "an error occured with the accelerometer")))))
#;(define (on-tilt! world-updater effect-updater)
(let ([accelerometer (js-new (js-get-global-value "Accelerometer"))])
(make-world-config (lambda (success error)
(js-call (js-get-field accelerometer "watchOrientation")
accelerometer
success
error))
(lambda (shutdown-f) (js-call shutdown-f #f))
(lambda (w js-azimuth js-pitch js-roll)
(let ([azimuth (prim-js->racket js-azimuth)]
[pitch (prim-js->racket js-pitch)]
[roll (prim-js->racket js-roll)])
(world-with-effects (effect-updater w azimuth pitch roll)
(world-updater w azimuth pitch roll))))
(lambda (w e)
(error 'on-tilt! "an error occured with the accelerometer")))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; adapt: (world-updater -> world-config) (world-updater -> world-config) -> (world-updater -> world-config)
;; Does the run-time check to see which implementation of a world updater is
;; appropriate.
(define (adapt mock-impl phone-impl)
(lambda (world-updater)
(cond
[(running-in-phone-context?)
(phone-impl world-updater)]
[else
(mock-impl world-updater)])))
;; Here are the provided bindings.
(define on-acceleration (adapt mock-on-acceleration phonegap-on-acceleration))
(define on-tilt
(case-lambda
[(world-updater) (on-tilt world-updater 1)]
[(world-updater delay)
(cond [(running-in-phone-context?)
(phonegap-on-tilt world-updater delay)]
[else
(mock-on-tilt world-updater delay)])]))
(define on-shake (adapt mock-on-shake phonegap-on-shake))