230 lines
7.2 KiB
Racket
230 lines
7.2 KiB
Racket
#lang racket/base
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(require ffi/unsafe
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ffi/unsafe/define
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ffi/unsafe/atomic
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ffi/unsafe/os-thread
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racket/async-channel
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racket/runtime-path
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racket/port
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data/queue
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json
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racket/string
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racket/path
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)
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(provide rkt-wv
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rkt-wv-win
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rkt-webview-create
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rkt-webview-close
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rkt-webview-set-url!
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rkt-webview-set-html!
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rkt-webview-run-js
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rkt-webview-move
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rkt-webview-resize
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rkt-webview-exit
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rkt-webview-valid?
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rkt-webview-open-devtools
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)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; FFI Library
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define lib-type 'release)
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(define-runtime-path lib-dir "lib")
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(define libname (let ((os (system-type 'os*)))
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(cond ((eq? os 'windows) (format "rktwebview.dll"))
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((eq? os 'linux) (format "librktwebview.so"))
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(else (error (format "OS ~a not supported" os)))))
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)
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;(set! libname "../rktwebview/build/Release/rktwebview.dll")
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;(set! libname "../rktwebview/build/Release/librktwebview.so")
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(set! libname "../rktwebview_qt/build/Release/librktwebview_qt.so")
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(define webview-lib-file (build-path lib-dir libname))
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(define webview-lib (ffi-lib webview-lib-file))
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(define-ffi-definer define-rktwebview webview-lib)
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(define callback-box (box '()))
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(define (applier thunk)
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(thunk))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Types / Functions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-cstruct _rkt_evt_t
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([w _int]
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[evt _pointer]
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))
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;RKTWEBVIEW_QT_EXPORT void rkt_webview_init(int &argc, char **argv);
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(define-rktwebview rkt_webview_init
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(_fun -> _void))
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;RKTWEBVIEW_QT_EXPORT void rkt_webview_process_events(int for_ms);
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(define-rktwebview rkt_webview_process_events
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(_fun _int -> _void))
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;RKTWEBVIEW_QT_EXPORT int rkt_webview_create(int parent);
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(define-rktwebview rkt_webview_create
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(_fun _int (_fun #:keep callback-box #:async-apply applier
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_rkt_evt_t-pointer -> _void) -> _int))
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;RKTWEBVIEW_QT_EXPORT void rkt_webview_close(int wv);
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(define-rktwebview rkt_webview_close
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(_fun _int -> _void))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_set_url(int wv, const char *url);
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(define-rktwebview rkt_webview_set_url
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(_fun _int _string/utf-8 -> _int))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_set_html(int wv, const char *html);
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(define-rktwebview rkt_webview_set_html
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(_fun _int _string/utf-8 -> _int))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_run_js(int wv, const char *js);
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(define-rktwebview rkt_webview_run_js
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(_fun _int _string/utf-8 -> _int))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_open_devtools(int wv);
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(define-rktwebview rkt_webview_open_devtools
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(_fun _int -> _int))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_destroy_event(rkt_event_t e);
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(define-rktwebview rkt_webview_destroy_event
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(_fun _rkt_evt_t-pointer -> _int))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_move(rktwebview_t w, int x, int y);
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(define-rktwebview rkt_webview_move
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(_fun _int _int _int -> _int))
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;RKTWEBVIEW_QT_EXPORT result_t rkt_webview_resize(rktwebview_t w, int width, int height);
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(define-rktwebview rkt_webview_resize
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(_fun _int _int _int -> _int))
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;RKTWEBVIEW_QT_EXPORT bool rkt_webview_valid(rktwebview_t wv);
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(define-rktwebview rkt_webview_valid
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(_fun _int -> _int))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Initialize and start library
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define process-events #t)
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(define (stop-event-processing)
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(set! process-events #f))
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(define (start-event-processing)
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(thread (λ ()
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(letrec ((f (λ ()
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(rkt_webview_process_events 1)
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(sleep 0.001)
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(if process-events
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(f)
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(begin
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(displayln "Stopping event processing")
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'done)))))
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(f)))))
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(rkt_webview_init)
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(start-event-processing)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Provided features
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-struct rkt-wv
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(win evt-queue callback [valid #:mutable])
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#:transparent
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)
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(define rkt-wv-store (make-hash))
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(define (rkt-process-events handle)
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(if (> (queue-length (rkt-wv-evt-queue handle)) 0)
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(let ((e (dequeue! (rkt-wv-evt-queue handle))))
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(if (symbol? e)
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(if (eq? e 'quit)
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(begin
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(hash-remove! rkt-wv-store (rkt-wv-win handle))
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'quit)
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(rkt-process-events handle))
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(let ((evt (cast (rkt_evt_t-evt e) _pointer _string*/utf-8)))
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((rkt-wv-callback handle) handle evt)
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(rkt_webview_destroy_event e)
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(rkt-process-events handle)))
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)
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'done))
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(define (rkt-webview-create parent evt-callback)
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(let ((evt-queue (make-queue)))
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(let ((wv (rkt_webview_create parent
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(λ (rkt-evt)
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(enqueue! evt-queue rkt-evt)))))
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(let ((handle (make-rkt-wv wv evt-queue evt-callback #t)))
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(thread (λ ()
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(sleep 1)
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(letrec ((f (λ ()
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(let ((r (rkt-process-events handle)))
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(if (eq? r 'quit)
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(begin
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(set-rkt-wv-valid! handle #f)
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(displayln "Quitting event loop")
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'done)
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(begin
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;(displayln "Waiting for events.")
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(sleep 0.01)
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(f)))))))
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(f))))
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(hash-set! rkt-wv-store (rkt-wv-win handle) handle)
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handle))))
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(define (rkt-webview-close handle)
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(rkt_webview_close (rkt-wv-win handle))
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(enqueue! (rkt-wv-evt-queue handle) 'quit)
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#t)
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(define (rkt-webview-set-url! wv url)
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(rkt_webview_set_url (rkt-wv-win wv) url))
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(define (rkt-webview-set-html! wv html)
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(rkt_webview_set_html (rkt-wv-win wv) html))
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(define (rkt-webview-run-js wv js)
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(rkt_webview_run_js (rkt-wv-win wv) js))
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(define (rkt-webview-resize wv w h)
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(rkt_webview_resize (rkt-wv-win wv) w h))
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(define (rkt-webview-move wv x y)
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(rkt_webview_move (rkt-wv-win wv) x y))
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(define (rkt-webview-open-devtools wv)
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(rkt_webview_open_devtools (rkt-wv-win wv)))
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(define (rkt-webview-valid? wv)
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(if (eq? (rkt-wv-valid wv) #f)
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#f
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(if (= (rkt_webview_valid wv) 0)
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#f
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#t)))
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(define (rkt-webview-exit)
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(let ((open-windows (hash->list rkt-wv-store)))
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(for-each (λ (kv)
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(let ((win (car kv))
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(handle (cdr kv)))
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(rkt-webview-close handle)))
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open-windows))
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(stop-event-processing))
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