428 lines
14 KiB
Scheme
428 lines
14 KiB
Scheme
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#lang scheme/base
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(require scheme/class
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scheme/unit
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scheme/list
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scheme/match
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scheme/gui
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framework/framework
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syntax/boundmap
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"interfaces.ss"
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"prefs.ss"
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"extensions.ss"
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"warning.ss"
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"hiding-panel.ss"
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"term-record.ss"
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(prefix-in s: "../syntax-browser/widget.ss")
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(prefix-in s: "../syntax-browser/params.ss")
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"../model/deriv.ss"
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"../model/deriv-util.ss"
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"../model/deriv-find.ss"
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"../model/trace.ss"
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"../model/reductions.ss"
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"../model/steps.ss"
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"cursor.ss"
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"../util/notify.ss")
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(provide macro-stepper-widget%
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macro-stepper-widget/process-mixin)
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;; Macro Stepper
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;; macro-stepper-widget%
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(define macro-stepper-widget%
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(class* object% ()
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(init-field parent)
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(init-field config)
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;; Terms
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;; all-terms : (list-of TermRecord)
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;; (Reversed)
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(define all-terms null)
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;; terms : (Cursor-of TermRecord)
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;; Contains visible terms of all-terms
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(define terms (cursor:new null))
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;; focused-term : -> TermRecord or #f
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(define (focused-term)
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(cursor:next terms))
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;; add-deriv : Deriv -> void
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(define/public (add-deriv d)
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(let ([trec (new term-record% (stepper this) (raw-deriv d))])
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(add trec)))
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;; add-trace : (list-of event) -> void
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(define/public (add-trace events)
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(let ([trec (new term-record% (stepper this) (events events))])
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(add trec)))
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;; add : TermRecord -> void
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(define/public (add trec)
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(set! all-terms (cons trec all-terms))
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(let ([display-new-term? (cursor:at-end? terms)]
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[invisible? (send trec get-deriv-hidden?)])
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(unless invisible?
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(cursor:add-to-end! terms (list trec))
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(trim-navigator)
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(if display-new-term?
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(refresh)
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(update)))))
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;; remove-current-term : -> void
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(define/public (remove-current-term)
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(cursor:remove-current! terms)
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(trim-navigator)
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(refresh))
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(define/public (get-config) config)
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(define/public (get-controller) sbc)
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(define/public (get-view) sbview)
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(define/public (get-warnings-area) warnings-area)
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(define/public (get-macro-hiding-prefs) macro-hiding-prefs)
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(define/public (reset-primary-partition)
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(send sbc reset-primary-partition)
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(update/preserve-view))
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(define area (new vertical-panel% (parent parent)))
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(define supernavigator
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(new horizontal-panel%
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(parent area)
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(stretchable-height #f)
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(alignment '(center center))))
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(define navigator
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(new horizontal-panel%
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(parent supernavigator)
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(stretchable-width #f)
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(stretchable-height #f)
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(alignment '(left center))))
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(define extra-navigator
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(new horizontal-panel%
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(parent supernavigator)
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(stretchable-width #f)
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(stretchable-height #f)
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(alignment '(left center))
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(style '(deleted))))
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(define warnings-area (new stepper-warnings% (parent area)))
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(define sbview (new stepper-syntax-widget%
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(parent area)
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(macro-stepper this)))
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(define sbc (send sbview get-controller))
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(define control-pane
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(new vertical-panel% (parent area) (stretchable-height #f)))
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(define macro-hiding-prefs
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(new macro-hiding-prefs-widget%
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(parent control-pane)
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(stepper this)
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(config config)))
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(send config listen-show-syntax-properties?
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(lambda (show?) (send sbview show-props show?)))
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(send config listen-show-hiding-panel?
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(lambda (show?) (show-macro-hiding-prefs show?)))
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(send sbc listen-selected-syntax
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(lambda (stx) (send macro-hiding-prefs set-syntax stx)))
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(send config listen-highlight-foci?
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(lambda (_) (update/preserve-view)))
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(send config listen-highlight-frontier?
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(lambda (_) (update/preserve-view)))
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(send config listen-show-rename-steps?
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(lambda (_) (refresh/re-reduce)))
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(send config listen-one-by-one?
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(lambda (_) (refresh/re-reduce)))
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(send config listen-force-letrec-transformation?
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(lambda (_) (refresh/resynth)))
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(send config listen-extra-navigation?
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(lambda (show?) (show-extra-navigation show?)))
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(define nav:up
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(new button% (label "Previous term") (parent navigator)
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(callback (lambda (b e) (navigate-up)))))
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(define nav:start
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(new button% (label "<-- Start") (parent navigator)
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(callback (lambda (b e) (navigate-to-start)))))
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(define nav:previous
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(new button% (label "<- Step") (parent navigator)
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(callback (lambda (b e) (navigate-previous)))))
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(define nav:next
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(new button% (label "Step ->") (parent navigator)
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(callback (lambda (b e) (navigate-next)))))
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(define nav:end
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(new button% (label "End -->") (parent navigator)
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(callback (lambda (b e) (navigate-to-end)))))
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(define nav:down
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(new button% (label "Next term") (parent navigator)
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(callback (lambda (b e) (navigate-down)))))
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(define/private (trim-navigator)
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(if (> (length (cursor->list terms)) 1)
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(send navigator change-children
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(lambda _
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(list nav:up
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nav:start
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nav:previous
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nav:next
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nav:end
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nav:down)))
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(send navigator change-children
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(lambda _
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(list nav:start
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nav:previous
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nav:next
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nav:end)))))
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(define/public (show-macro-hiding-prefs show?)
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(send area change-children
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(lambda (children)
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(if show?
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(append (remq control-pane children) (list control-pane))
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(remq control-pane children)))))
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(define/private (show-extra-navigation show?)
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(send supernavigator change-children
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(lambda (children)
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(if show?
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(list navigator extra-navigator)
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(list navigator)))))
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;; Navigation
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(define/public-final (at-start?)
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(send (focused-term) at-start?))
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(define/public-final (at-end?)
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(send (focused-term) at-end?))
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(define/public-final (navigate-to-start)
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(send (focused-term) navigate-to-start)
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(update/save-position))
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(define/public-final (navigate-to-end)
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(send (focused-term) navigate-to-end)
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(update/save-position))
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(define/public-final (navigate-previous)
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(send (focused-term) navigate-previous)
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(update/save-position))
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(define/public-final (navigate-next)
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(send (focused-term) navigate-next)
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(update/save-position))
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(define/public-final (navigate-up)
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(when (focused-term)
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(send (focused-term) on-lose-focus))
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(cursor:move-prev terms)
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(refresh/move))
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(define/public-final (navigate-down)
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(when (focused-term)
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(send (focused-term) on-lose-focus))
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(cursor:move-next terms)
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(refresh/move))
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;; Update
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;; update/save-position : -> void
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(define/private (update/save-position)
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(update/preserve-lines-view))
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;; update/preserve-lines-view : -> void
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(define/public (update/preserve-lines-view)
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(define text (send sbview get-text))
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(define start-box (box 0))
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(define end-box (box 0))
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(send text get-visible-line-range start-box end-box)
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(update)
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(send text scroll-to-position
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(send text line-start-position (unbox start-box))
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#f
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(send text line-start-position (unbox end-box))
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'start))
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;; update/preserve-view : -> void
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(define/public (update/preserve-view)
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(define text (send sbview get-text))
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(define start-box (box 0))
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(define end-box (box 0))
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(send text get-visible-position-range start-box end-box)
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(update)
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(send text scroll-to-position (unbox start-box) #f (unbox end-box) 'start))
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;; update : -> void
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;; Updates the terms in the syntax browser to the current step
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(define/private (update)
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(define text (send sbview get-text))
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(define position-of-interest 0)
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(define multiple-terms? (> (length (cursor->list terms)) 1))
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(send text begin-edit-sequence)
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(send sbview erase-all)
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(update:show-prefix)
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(when multiple-terms? (send sbview add-separator))
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(set! position-of-interest (send text last-position))
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(update:show-current-step)
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(when multiple-terms? (send sbview add-separator))
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(update:show-suffix)
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(send text end-edit-sequence)
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(send text scroll-to-position
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position-of-interest
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#f
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(send text last-position)
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'start)
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(enable/disable-buttons))
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;; update:show-prefix : -> void
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(define/private (update:show-prefix)
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;; Show the final terms from the cached synth'd derivs
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(for-each (lambda (trec) (send trec display-final-term))
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(cursor:prefix->list terms)))
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;; update:show-current-step : -> void
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(define/private (update:show-current-step)
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(when (focused-term)
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(send (focused-term) display-step)))
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;; update:show-suffix : -> void
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(define/private (update:show-suffix)
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(let ([suffix0 (cursor:suffix->list terms)])
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(when (pair? suffix0)
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(for-each (lambda (trec)
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(send trec display-initial-term))
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(cdr suffix0)))))
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;; enable/disable-buttons : -> void
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(define/private (enable/disable-buttons)
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(define term (focused-term))
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(send nav:start enable (and term (send term has-prev?)))
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(send nav:previous enable (and term (send term has-prev?)))
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(send nav:next enable (and term (send term has-next?)))
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(send nav:end enable (and term (send term has-next?)))
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(send nav:up enable (cursor:has-prev? terms))
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(send nav:down enable (cursor:has-next? terms)))
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;; --
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;; refresh/resynth : -> void
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;; Macro hiding policy has changed; invalidate cached parts of trec
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(define/public (refresh/resynth)
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(for-each (lambda (trec) (send trec invalidate-synth!))
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(cursor->list terms))
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(refresh))
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;; refresh/re-reduce : -> void
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;; Reduction config has changed; invalidate cached parts of trec
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(define/private (refresh/re-reduce)
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(for-each (lambda (trec) (send trec invalidate-steps!))
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(cursor->list terms))
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(refresh))
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;; refresh/move : -> void
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;; Moving between terms; clear the saved position
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(define/private (refresh/move)
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(refresh))
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;; refresh : -> void
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(define/public (refresh)
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(send warnings-area clear)
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(when (focused-term)
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(send (focused-term) on-get-focus))
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(update))
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;; delayed-recache-errors : (list-of (cons exn string))
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(define delayed-recache-errors null)
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;; handle-recache-error : exception string -> void
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(define/private (handle-recache-error exn part)
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(if (send config get-debug-catch-errors?)
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(begin
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(set! delayed-recache-errors
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(cons (cons exn part) delayed-recache-errors))
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(queue-callback
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(lambda ()
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(when (pair? delayed-recache-errors)
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(message-box
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"Error"
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(string-append
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"Internal errors in macro stepper:\n"
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(if (memq 'macro-hiding (map cdr delayed-recache-errors))
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(string-append
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"Macro hiding failed on one or more terms. "
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"The macro stepper is showing the terms "
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"with macro hiding disabled.\n")
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"")
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(if (memq 'reductions (map cdr delayed-recache-errors))
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(string-append
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"The macro stepper failed to compute the reduction sequence "
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"for one or more terms.\n")
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"")))
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(set! delayed-recache-errors null)))))
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(raise exn)))
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(define/private (foci x) (if (list? x) x (list x)))
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;; Hiding policy
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(define/public (get-show-macro?)
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(send macro-hiding-prefs get-policy))
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;; Derivation pre-processing
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(define/public (get-preprocess-deriv) (lambda (d) d))
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;; Initialization
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(super-new)
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(send sbview show-props (send config get-show-syntax-properties?))
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(show-macro-hiding-prefs (send config get-show-hiding-panel?))
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(show-extra-navigation (send config get-extra-navigation?))
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(refresh/move)
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))
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(define (macro-stepper-widget/process-mixin %)
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(class %
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(super-new)
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(define/override (get-preprocess-deriv)
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(lambda (d) (get-original-part d)))
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;; get-original-part : Deriv -> Deriv/#f
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;; Strip off mzscheme's #%top-interaction
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;; Careful: the #%top-interaction node may be inside of a lift-deriv
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(define/private (get-original-part deriv)
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(let ([deriv* (adjust-deriv/lift deriv)])
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deriv*))
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;; adjust-deriv/lift : Derivation -> (list-of Derivation)
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(define/private (adjust-deriv/lift deriv)
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(match deriv
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[(Wrap lift-deriv (e1 e2 first lifted-stx second))
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(let ([first (adjust-deriv/top first)])
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(and first
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(let ([e1 (wderiv-e1 first)])
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(make-lift-deriv e1 e2 first lifted-stx second))))]
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[else (adjust-deriv/top deriv)]))
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;; adjust-deriv/top : Derivation -> Derivation
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(define/private (adjust-deriv/top deriv)
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(if (or (syntax-source (wderiv-e1 deriv))
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(p:module? deriv))
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deriv
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;; It's not original...
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;; Strip out mzscheme's top-interactions
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;; Keep anything that is a non-mzscheme top-interaction
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;; Drop everything else (not original program)
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(cond [(not (mrule? deriv)) #f]
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[(for/or ([x (base-resolves deriv)]) (top-interaction-kw? x))
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;; Just mzscheme's top-interaction; strip it out
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(adjust-deriv/top (mrule-next deriv))]
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[(equal? (map syntax-e (base-resolves deriv)) '(#%top-interaction))
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;; A *different* top interaction; keep it
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deriv]
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[else
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;; Not original and not tagged with top-interaction
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#f])))
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(define/public (top-interaction-kw? x)
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(free-identifier=? x #'#%top-interaction))
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))
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