shrub/main/lib/console/core.hook

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::
:::: /hook/core/console/lib
::
:: This file is in the public domain.
::
/? 310
/- *console
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!:
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::::
::
|%
++ cs :: shared-state engine
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|_ console-share
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++ abet +<
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++ apex :: engine by rule
|* sef=_rule
|= act=console-action
^+ [[p=*(list console-effect) q=(rust ~ sef)] *console-share]
?- -.act
%det
=^ dut +>+>.$
%+ remit +.act
|= buf=(list ,@c)
=+ txt=(tufa buf)
=((lent txt) q.p:(sef [0 0] txt))
[[?~(dut ~ [[%det u.dut] ~]) ~] +>+>+<.$]
::
%ret
=+ dod=(rust (tufa buf) sef)
?~ dod
[[[%bel ~]~ ~] +>+>+<.$]
=^ cal +>+>.$ (transmit [%set ~])
:_ +>+>+<.$
:_ dod
:~ [%det cal]
[%nex ~]
==
==
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++ apse :: dialog engine
|* dog=(console-dialog)
|% ++ abet `console-share`+>+>- :: resolve
++ dole ::
=+ fov=^+(init:dog [[~ ~] [%& ~]])
|-
=+ fex=[%tan p.fov]
?- -.q.fov
%& [[p=fex q=[~ u=p.q.fov]] +>.$]
%| :- [p=[i=[%pro `console-prompt`p.p.q.fov] t=fex] q=~]
+>.$(dog q.p.q.fov)
==
::
++ init (dole init:dog) :: initialize
++ work
|= act=console-action
^+ init
?- -.act
%det
=^ dut +>+>.$
%+ remit +.act
|= buf=(list ,@c)
!=(~ (nice:dog (tufa buf)))
[[?~(dut ~ [[%det u.dut] ~]) ~] +>+>+<.$]
::
%ret
=+ txt=(tufa buf)
?. =(`& (nice:dog txt))
[[[%bel ~]~ ~] +>+>+<.$]
(dole (kick:dog txt))
==
--
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::
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++ apply
|= ted=console-edit
^+ +>
?- -.ted
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%del +>.$(buf (weld (scag p.ted buf) (slag +(p.ted) buf)))
%ins +>.$(buf (weld (scag p.ted buf) `_buf`[q.ted (slag p.ted buf)]))
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%mor |- ^+ +>.^$
?~ p.ted
+>.^$
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$(p.ted t.p.ted, +>.^$ ^$(ted i.p.ted))
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%nop +>.$
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%set +>.$(buf p.ted)
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==
::
::::
:: ++transmute: symmetric operational transformation.
::
:: for any console state +>, obeys
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::
:: =+ [x=(transmute a b) y=(transmute b a)]
:: .= (apply:(apply b) x)
:: (apply:(apply a) y)
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::
++ transmute :: dex as after sin
|= [sin=console-edit dex=console-edit]
^- console-edit
?: ?=(%mor -.sin)
|- ^- console-edit
?~ p.sin dex
$(p.sin t.p.sin, dex ^$(sin i.p.sin))
::
?: ?=(%mor -.dex)
:- %mor
|- ^- (list console-edit)
?~ p.dex ~
[^$(dex i.p.dex) $(p.dex t.p.dex)]
::
?: |(?=(%nop -.sin) ?=(%nop -.dex)) dex
?: ?=(%set -.sin) [%nop ~]
?: ?=(%set -.dex) dex
::
?- -.sin
%del
?- -.dex
%del ?: =(p.sin p.dex) [%nop ~]
?:((lth p.sin p.dex) dex(p (dec p.dex)) dex)
%ins ?:((lte p.sin p.dex) dex(p (dec p.dex)) dex)
==
::
%ins
?- -.dex
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%del ?:((lte p.sin p.dex) dex(p +(p.dex)) dex)
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%ins ?: =(p.sin p.dex)
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?:((gth q.sin q.dex) dex dex(p +(p.dex)))
?:((lte p.sin p.dex) dex(p +(p.dex)) dex)
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==
==
::
++ commit :: local change
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|= ted=console-edit
^+ +>
(apply(own.ven +(own.ven)) ted)
::
::::
:: ++inverse: inverse of change in context.
::
:: for any console state +>, obeys
::
:: =(+> (apply:(apply a) (inverse a)))
::
++ inverse :: relative inverse
|= ted=console-edit
^- console-edit
?- -.ted
%del [%ins p.ted (snag p.ted buf)]
%ins [%del p.ted]
%mor :- %mor
%- flop
|- ^- (list console-edit)
?~ p.ted ~
:- ^$(ted i.p.ted)
$(p.ted t.p.ted, +>.^$ (apply i.p.ted))
%nop [%nop ~]
%set [%set buf]
==
::
++ transmit :: outgoing change
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|= ted=console-edit
^- [console-change _+>]
[[[his.ven own.ven] (sham buf) ted] (commit ted)]
::
++ realize :: naturalize event
|= console-change
^- [console-edit _+>]
?> &(=(his.ler his.ven) (lte own.ler own.ven))
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?> &(=(his.ler his.ven) (lte own.ler own.ven))
?> |(!=(own.ler own.ven) =(haw (sham buf)))
=. leg (scag (sub own.ven own.ler) leg)
[(transmute [%mor leg] ted) +>]
::
++ remit :: conditional accept
|= [cal=console-change ask=$+((list ,@c) ?)]
^- [(unit console-change) _+>]
=+ old=+>
=^ dat +>.$ (realize cal)
=. +>.$ (apply(his.ven +(his.ven)) dat)
?: (ask buf)
[~ +>.$]
=+ wad=(inverse dat)
:: ~& [%remit-old buf.old]
:: ~& [%remit-new buf]
:: ~& [%remit ted/ted.cal]
:: ~& [%remit dat/dat]
:: ~& [%remit wad/wad]
=^ lic +>.$ (transmit wad)
:: ~& [%remit-end [lic buf]]
[`lic +>.$]
::
++ receive :: accept change
|= cal=console-change
^+ +>
=^ dat +> (realize cal)
(apply(his.ven +(his.ven)) dat)
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--
--