# Wrappers around interaction primitives that take a potentially fake object
# and are thus easier to test.
exclusive-container event [
text:character
keycode:number # keys on keyboard without a unicode representation
touch:touch-event # mouse, track ball, etc.
resize:resize-event
# update the assume-console handler if you add more variants
]
container touch-event [
type:number
row:number
column:number
]
container resize-event [
width:number
height:number
]
container console [
current-event-index:number
events:address:array:event
]
recipe new-fake-console events:address:array:event -> result:address:console [
local-scope
load-ingredients
result:address:console <- new console:type
buf:address:address:array:event <- get-address *result, events:offset
*buf <- copy events
idx:address:number <- get-address *result, current-event-index:offset
*idx <- copy 0
]
recipe read-event console:address:console -> result:event, console:address:console, found?:boolean, quit?:boolean [
local-scope
load-ingredients
{
break-unless console
current-event-index:address:number <- get-address *console, current-event-index:offset
buf:address:array:event <- get *console, events:offset
{
max:number <- length *buf
done?:boolean <- greater-or-equal *current-event-index, max
break-unless done?
dummy:address:event <- new event:type
reply *dummy, console/same-as-ingredient:0, 1/found, 1/quit
}
result <- index *buf, *current-event-index
*current-event-index <- add *current-event-index, 1
reply result, console/same-as-ingredient:0, 1/found, 0/quit
}
switch # real event source is infrequent; avoid polling it too much
result:event, found?:boolean <- check-for-interaction
reply result, console/same-as-ingredient:0, found?, 0/quit
]
# variant of read-event for just keyboard events. Discards everything that
# isn't unicode, so no arrow keys, page-up/page-down, etc. But you still get
# newlines, tabs, ctrl-d..
recipe read-key console:address:console -> result:character, console:address:console, found?:boolean, quit?:boolean [
local-scope
load-ingredients
x:event, console, found?:boolean, quit?:boolean <- read-event console
reply-if quit?, 0, console/same-as-ingredient:0, found?, quit?
reply-unless found?, 0, console/same-as-ingredient:0, found?, quit?
c:address:character <- maybe-convert x, text:variant
reply-unless c, 0, console/same-as-ingredient:0, 0/found, 0/quit
reply *c, console/same-as-ingredient:0, 1/found, 0/quit
]
recipe send-keys-to-channel console:address:console, chan:address:channel, screen:address:screen -> console:address:console, chan:address:channel, screen:address:screen [
local-scope
load-ingredients
{
c:character, console, found?:boolean, quit?:boolean <- read-key console
loop-unless found?
break-if quit?
assert c, [invalid event, expected text]
screen <- print screen, c
chan <- write chan, c
loop
}
]
recipe wait-for-event console:address:console -> console:address:console [
local-scope
load-ingredients
{
_, console, found?:boolean <- read-event console
loop-unless found?
}
]
# use this helper to skip rendering if there's lots of other events queued up
recipe has-more-events? console:address:console -> result:boolean [
local-scope
load-ingredients
{
break-unless console
# fake consoles should be plenty fast; never skip
reply 0/false
}
result <- interactions-left?
]