# 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.
# update the assume-console handler if you add more variants
]
container touch-event [
type:number
row:number
column:number
]
container console [
index:number
data:address:array:event
]
recipe new-fake-console [
local-scope
result:address:console <- new console:type
buf:address:address:array:character <- get-address result:address:console/lookup, data:offset
#? $start-tracing #? 1
buf:address:address:array:character/lookup <- next-ingredient
#? $stop-tracing #? 1
idx:address:number <- get-address result:address:console/lookup, index:offset
idx:address:number/lookup <- copy 0
reply result:address:console
]
recipe read-event [
local-scope
x:address:console <- next-ingredient
{
break-unless x:address:console
idx:address:number <- get-address x:address:console/lookup, index:offset
buf:address:array:event <- get x:address:console/lookup, data:offset
{
max:number <- length buf:address:array:event/lookup
done?:boolean <- greater-or-equal idx:address:number/lookup, max:number
break-unless done?:boolean
dummy:address:event <- new event:type
reply dummy:address:event/lookup, x:address:console/same-as-ingredient:0, 1/found, 1/quit
}
result:event <- index buf:address:array:event/lookup, idx:address:number/lookup
idx:address:number/lookup <- add idx:address:number/lookup, 1
reply result:event, x:address:console/same-as-ingredient:0, 1/found, 0/quit
}
# real event source is infrequent; avoid polling it too much
switch
result:event, found?:boolean <- check-for-interaction
reply result:event, x:address:console/same-as-ingredient:0, found?:boolean, 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 [
local-scope
#? $print default-space:address:array:location #? 1
#? $exit #? 1
#? $start-tracing #? 1
console:address <- next-ingredient
x:event, console:address, found?:boolean, quit?:boolean <- read-event console:address
#? $print [aaa 1] #? 1
reply-if quit?:boolean, 0, console:address/same-as-ingredient:0, found?:boolean, quit?:boolean
#? $print [aaa 2] #? 1
reply-unless found?:boolean, 0, console:address/same-as-ingredient:0, found?:boolean, quit?:boolean
#? $print [aaa 3] #? 1
c:address:character <- maybe-convert x:event, text:variant
reply-unless c:address:character, 0, console:address/same-as-ingredient:0, 0/found, 0/quit
#? $print [aaa 4] #? 1
reply c:address:character/lookup, console:address/same-as-ingredient:0, 1/found, 0/quit
]
recipe send-keys-to-channel [
local-scope
console:address <- next-ingredient
chan:address:channel <- next-ingredient
screen:address <- next-ingredient
{
c:character, console:address, found?:boolean, quit?:boolean <- read-key console:address
loop-unless found?:boolean
break-if quit?:boolean
assert c:character, [invalid event, expected text]
print-character screen:address, c:character
chan:address:channel <- write chan:address:channel, c:character
loop
}
]
recipe wait-for-event [
local-scope
console:address <- next-ingredient
{
_, console:address, found?:boolean <- read-event console:address
loop-unless found?:boolean
}
]
# use this helper to skip rendering if there's lots of other events queued up
recipe has-more-events? [
local-scope
console:address <- next-ingredient
{
break-unless console:address
# fake consoles should be plenty fast; never skip
reply 0/false
}
result:boolean <- interactions-left?
reply result:boolean
]