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<pre id='vimCodeElement'>
<span class="Comment"># Wrappers around keyboard primitives that take a 'keyboard' object and are thus</span>
<span class="Comment"># easier to test.</span>
container keyboard <span class="Constant">[ # can't think of another word like screen/display, so real and fake keyboards use the same name</span>
<span class="Constant"> index:number</span>
<span class="Constant"> data:address:array:character</span>
<span class="Constant">]</span>
<span class="muRecipe">recipe</span> init-fake-keyboard [
<span class="Identifier">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
result:address:keyboard<span class="Special"> <- </span>new keyboard:type
buf:address:address:array:character<span class="Special"> <- </span>get-address result:address:keyboard/deref, data:offset
<span class="CommentedCode">#? $start-tracing #? 1</span>
buf:address:address:array:character/deref<span class="Special"> <- </span><span class="Identifier">next-ingredient</span>
<span class="CommentedCode">#? $stop-tracing #? 1</span>
idx:address:number<span class="Special"> <- </span>get-address result:address:keyboard/deref, index:offset
idx:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="Identifier">reply</span> result:address:keyboard
]
<span class="muRecipe">recipe</span> read-key [
<span class="Identifier">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
x:address:keyboard<span class="Special"> <- </span><span class="Identifier">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Identifier">break-unless</span> x:address:keyboard
idx:address:number<span class="Special"> <- </span>get-address x:address:keyboard/deref, index:offset
buf:address:array:character<span class="Special"> <- </span>get x:address:keyboard/deref, data:offset
max:number<span class="Special"> <- </span>length buf:address:array:character/deref
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal idx:address:number/deref, max:number
<span class="Identifier">break-unless</span> done?:boolean
<span class="Identifier">reply</span> <span class="Constant">0:literal/eof</span>, <span class="Constant">1:literal/found</span>, x:address:keyboard/same-as-ingredient:0
<span class="Delimiter">}</span>
c:character<span class="Special"> <- </span>index buf:address:array:character/deref, idx:address:number/deref
idx:address:number/deref<span class="Special"> <- </span>add idx:address:number/deref, <span class="Constant">1:literal</span>
<span class="Identifier">reply</span> c:character, <span class="Constant">1:literal/found</span>, x:address:keyboard/same-as-ingredient:0
<span class="Delimiter">}</span>
<span class="Comment"># real keyboard input is infrequent; avoid polling it too much</span>
switch
c:character, found?:boolean<span class="Special"> <- </span>read-key-from-keyboard
<span class="Identifier">reply</span> c:character, found?:boolean, x:address:keyboard/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> wait-for-key [
<span class="Identifier">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
x:address:keyboard<span class="Special"> <- </span><span class="Identifier">next-ingredient</span>
<span class="Delimiter">{</span>
<span class="Identifier">break-unless</span> x:address:keyboard
<span class="Comment"># on fake keyboards 'wait-for-key' behaves just like 'read-key'</span>
c:character, x:address:keyboard<span class="Special"> <- </span>read-key x:address:keyboard
<span class="Identifier">reply</span> c:character, x:address:keyboard/same-as-ingredient:0
<span class="Delimiter">}</span>
c:character<span class="Special"> <- </span>wait-for-key-from-keyboard
<span class="Identifier">reply</span> c:character, x:address:keyboard/same-as-ingredient:0
]
<span class="muRecipe">recipe</span> send-keys-to-channel [
<span class="Identifier">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
keyboard:address<span class="Special"> <- </span><span class="Identifier">next-ingredient</span>
chan:address:channel<span class="Special"> <- </span><span class="Identifier">next-ingredient</span>
screen:address<span class="Special"> <- </span><span class="Identifier">next-ingredient</span>
<span class="Delimiter">{</span>
c:character, found?:boolean<span class="Special"> <- </span>read-key keyboard:address
<span class="Identifier">loop-unless</span> found?:boolean
<span class="CommentedCode">#? print-integer screen:address, c:character #? 1</span>
print-character screen:address, c:character
chan:address:channel<span class="Special"> <- </span>write chan:address:channel, c:character
<span class="Comment"># todo: eof</span>
<span class="Identifier">loop</span>
<span class="Delimiter">}</span>
]
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