racket/collects/redex/private/pict.rkt
2010-04-27 16:50:15 -06:00

1024 lines
42 KiB
Racket

#lang scheme/base
(require (lib "mrpict.ss" "texpict")
(lib "utils.ss" "texpict")
scheme/gui/base
scheme/class
scheme/match
(only-in scheme/list drop-right last partition)
"reduction-semantics.ss"
"struct.ss"
"loc-wrapper.ss"
"matcher.ss"
"arrow.ss"
"core-layout.ss")
(require (for-syntax scheme/base))
(provide render-term
term->pict
language->pict
render-language
render-language-nts
reduction-relation->pict
render-reduction-relation
render-reduction-relation-rules
metafunction->pict
metafunctions->pict
render-metafunction
render-metafunctions
basic-text
default-style
label-style
literal-style
metafunction-style
label-font-size
default-font-size
metafunction-font-size
reduction-relation-rule-separation
linebreaks
just-before
just-after
rule-pict-style
arrow-space
label-space
metafunction-pict-style
metafunction-cases
compact-vertical-min-width
extend-language-show-union
set-arrow-pict!)
;
;
;
; ;;;; ; ;;
; ;;;; ;; ;;
; ;;; ;;; ;;; ;;;;;;; ;;;; ;;;; ;;;;; ;;;;; ;;;; ;;;; ;;;
; ;;;;;;; ;;;;; ;;;;;;;; ;;;; ;;;; ;;;;;; ;;;;;; ;;;; ;;;;;; ;;;;;;;;;
; ;;;; ;; ;;;; ;; ;;;;;;;;; ;;;; ;;;; ;;;;;;; ;;;; ;;;; ;;;;;;;; ;;;; ;;;;
; ;;;; ;;;;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;; ;;;; ;;;;
; ;;;; ;;;;; ;;;;;;;;; ;;;; ;;;; ;;;;;;; ;;;;; ;;;; ;;;;;;;; ;;;; ;;;;
; ;;;; ;;;;;; ;;;;;;;; ;;;;;;;;; ;;;;;; ;;;;; ;;;; ;;;;;; ;;;; ;;;;
; ;;;; ;;;; ;;;;;;; ;;; ;;;; ;;;;; ;;;; ;;;; ;;;; ;;;; ;;;;
;
;
;
;
;
;
; ;;;; ; ;;
; ;;;; ;; ;;
; ;;; ;;; ;;; ;;;; ;;;;;;; ;;;;; ;;;; ;;;; ;;;
; ;;;;;;; ;;;;; ;;;; ;;;;;;;; ;;;;;; ;;;; ;;;;;; ;;;;;;;;;
; ;;;; ;; ;;;; ;; ;;;; ;;;; ;;;; ;;;; ;;;;;;;; ;;;; ;;;;
; ;;;; ;;;;;;; ;;;; ;;;;;;; ;;;; ;;;; ;;;; ;;; ;;;; ;;;;
; ;;;; ;;;;; ;;;; ;; ;;;; ;;;;; ;;;; ;;;;;;;; ;;;; ;;;;
; ;;;; ;;;;;; ;;;; ;;;;;;;; ;;;;; ;;;; ;;;;;; ;;;; ;;;;
; ;;;; ;;;; ;;;; ;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;;
;
;
;
(define (do-reduction-relation->pict what rr style)
(let ([rules (render-reduction-relation-rules)])
((rule-pict-style->proc style)
(map (rr-lws->trees (language-nts (reduction-relation-lang rr)))
(if rules
(let ([ht (make-hash)])
(for-each (lambda (rp)
(hash-set! ht (rule-pict-label rp) rp))
(reduction-relation-lws rr))
(map (lambda (label)
(hash-ref ht label
(lambda ()
(error what
"no rule found for label: ~e"
label))))
rules))
(reduction-relation-lws rr))))))
(define (reduction-relation->pict rr #:style [style (rule-pict-style)])
(do-reduction-relation->pict 'reduction-relation->pict rr style))
(define render-reduction-relation-rules (make-parameter #f))
(define (render-reduction-relation rr [filename #f]
#:style [style (rule-pict-style)])
(if filename
(save-as-ps (λ () (do-reduction-relation->pict 'render-reduction-relation rr style))
filename)
(parameterize ([dc-for-text-size (make-object bitmap-dc% (make-object bitmap% 1 1))])
(do-reduction-relation->pict 'render-reduction-relation rr style))))
(define ((rr-lws->trees nts) rp)
(let ([tp (λ (x) (lw->pict nts x))])
(make-rule-pict (rule-pict-arrow rp)
(tp (rule-pict-lhs rp))
(tp (rule-pict-rhs rp))
(rule-pict-label rp)
(map (lambda (v)
(if (pair? v)
(cons (tp (car v)) (tp (cdr v)))
(tp v)))
(rule-pict-side-conditions/pattern-binds rp))
(map tp (rule-pict-fresh-vars rp)))))
(define current-label-extra-space (make-parameter 0))
(define reduction-relation-rule-separation (make-parameter 4))
(define ((rule-picts->pict/horizontal left-column-align) rps)
(let* ([sep 2]
[max-rhs (apply max
0
(map pict-width
(map rule-pict-rhs rps)))]
[max-w (apply max
0
(map (lambda (rp)
(+ sep sep
(pict-width (rule-pict-lhs rp))
(pict-width (arrow->pict (rule-pict-arrow rp)))
(pict-width (rule-pict-rhs rp))))
rps))])
(table 4
(apply
append
(map (lambda (rp)
(let ([arrow (hbl-append (blank (arrow-space) 0)
(arrow->pict (rule-pict-arrow rp))
(blank (arrow-space) 0))]
[lhs (rule-pict-lhs rp)]
[rhs (rule-pict-rhs rp)]
[spc (basic-text " " (default-style))]
[label (hbl-append (blank (label-space) 0) (rp->pict-label rp))]
[sep (blank 4)])
(list lhs arrow rhs label
(blank) (blank)
(let ([sc (rp->side-condition-pict rp max-w)])
(inset sc (min 0 (- max-rhs (pict-width sc))) 0 0 0))
(blank)
sep (blank) (blank) (blank))))
rps))
(list* left-column-align ctl-superimpose ltl-superimpose)
(list* left-column-align ctl-superimpose ltl-superimpose)
(list* sep sep (+ sep (current-label-extra-space))) 2)))
(define arrow-space (make-parameter 0))
(define label-space (make-parameter 0))
(define ((make-vertical-style side-condition-combiner) rps)
(let* ([mk-top-line-spacer
(λ (rp)
(hbl-append (rule-pict-lhs rp)
(basic-text " " (default-style))
(arrow->pict (rule-pict-arrow rp))
(basic-text " " (default-style))
(rp->pict-label rp)))]
[mk-bot-line-spacer
(λ (rp)
(rt-superimpose
(rule-pict-rhs rp)
(rp->side-condition-pict rp +inf.0)))]
[multi-line-spacer
(ghost
(launder
(ctl-superimpose
(apply ctl-superimpose (map mk-top-line-spacer rps))
(apply ctl-superimpose (map mk-bot-line-spacer rps)))))]
[spacer (dc void
(pict-width multi-line-spacer)
(pict-descent multi-line-spacer) ;; probably could be zero ...
0
(pict-descent multi-line-spacer))])
(apply
vl-append
(add-between
(blank 0 (reduction-relation-rule-separation))
(map (λ (rp)
(side-condition-combiner
(vl-append
(ltl-superimpose
(htl-append (rule-pict-lhs rp)
(basic-text " " (default-style))
(arrow->pict (rule-pict-arrow rp)))
(rtl-superimpose
spacer
(rp->pict-label rp)))
(rule-pict-rhs rp))
(rp->side-condition-pict rp +inf.0)))
rps)))))
(define compact-vertical-min-width (make-parameter 0))
(define rule-picts->pict/vertical
(make-vertical-style vr-append))
(define rule-picts->pict/vertical-overlapping-side-conditions
(make-vertical-style rbl-superimpose))
(define (rule-picts->pict/compact-vertical rps)
(let* ([max-w (apply max
(compact-vertical-min-width)
(map pict-width
(append
(map rule-pict-lhs rps)
(map rule-pict-rhs rps))))]
[scs (map (lambda (rp)
(rp->side-condition-pict rp max-w))
rps)]
[labels (map (lambda (rp)
(hbl-append (blank (label-space) 0) (rp->pict-label rp)))
rps)]
[total-w (apply max
max-w
(append (map pict-width scs)
(map (lambda (lbl)
(+ max-w 2 (label-space) (pict-width lbl)))
labels)))]
[one-line
(lambda (sep?)
(lambda (rp sc label)
(let ([arrow (hbl-append (arrow->pict (rule-pict-arrow rp)) (blank (arrow-space) 0))]
[lhs (rule-pict-lhs rp)]
[rhs (rule-pict-rhs rp)]
[spc (basic-text " " (default-style))]
[sep (blank (compact-vertical-min-width)
(reduction-relation-rule-separation))]
[add-label (lambda (p label)
(htl-append
p
(inset label (- total-w (pict-width p) (pict-width label))
0 0 0)))])
(append
(if ((apply + (map pict-width (list lhs spc arrow spc rhs)))
. < .
max-w)
(list
(blank) (add-label (hbl-append lhs spc arrow spc rhs) label)
(blank) sc)
(list (blank) (add-label lhs label)
arrow rhs
(blank) sc))
(if sep? (list (blank) sep) null)))))])
(if (null? rps)
(blank)
(table 2
(append
(apply
append
(map (one-line #t)
(drop-right rps 1)
(drop-right scs 1)
(drop-right labels 1)))
((one-line #f) (last rps) (last scs) (last labels)))
ltl-superimpose ltl-superimpose
2 2))))
;; side-condition-pict : (listof pict) (listof (or/c (cons/c pict pict) pict)) number -> pict
;; the elements of pattern-binds/sc that are pairs are bindings (ie "x = <something>")
;; and the elements of pattern-binds/sc that are just picts are just plain side-conditions
(define (side-condition-pict fresh-vars pattern-binds/sc max-w)
(let* ([frsh
(if (null? fresh-vars)
null
(list
(hbl-append
(apply
hbl-append
(add-between
(basic-text ", " (default-style))
fresh-vars))
(basic-text " fresh" (default-style)))))]
[binds (map (lambda (b)
(if (pair? b)
(htl-append
(car b)
(make-=)
(cdr b))
b))
pattern-binds/sc)]
[lst (add-between
'comma
(append
binds
frsh))])
(if (null? lst)
(blank)
(let ([where (basic-text " where " (default-style))])
(let ([max-w (- max-w (pict-width where))])
(htl-append where
(let loop ([p (car lst)][lst (cdr lst)])
(cond
[(null? lst) p]
[(eq? (car lst) 'comma)
(loop (htl-append p (basic-text ", " (default-style)))
(cdr lst))]
[((+ (pict-width p) (pict-width (car lst))) . > . max-w)
(vl-append p
(loop (car lst) (cdr lst)))]
[else (loop (htl-append p (car lst)) (cdr lst))]))))))))
(define (rp->side-condition-pict rp max-w)
(side-condition-pict (rule-pict-fresh-vars rp)
(rule-pict-side-conditions/pattern-binds rp)
max-w))
(define (rp->pict-label rp)
(if (rule-pict-label rp)
(let ([m (regexp-match #rx"^([^_]*)(?:_([^_]*)|)$"
(format "~a" (rule-pict-label rp)))])
(hbl-append
((current-text) " [" (label-style) (label-font-size))
((current-text) (cadr m) (label-style) (label-font-size))
(if (caddr m)
((current-text) (caddr m) `(subscript . ,(label-style)) (label-font-size))
(blank))
((current-text) "]" (label-style) (label-font-size))))
(blank)))
(define (add-between i l)
(cond
[(null? l) l]
[else
(cons (car l)
(apply append
(map (λ (x) (list i x)) (cdr l))))]))
(define (make-horiz-space picts) (blank (pict-width (apply cc-superimpose picts)) 0))
(define rule-pict-style (make-parameter 'vertical))
(define (rule-pict-style->proc style)
(case style
[(vertical) rule-picts->pict/vertical]
[(compact-vertical) rule-picts->pict/compact-vertical]
[(vertical-overlapping-side-conditions)
rule-picts->pict/vertical-overlapping-side-conditions]
[(horizontal-left-align)
(rule-picts->pict/horizontal ltl-superimpose)]
[else ;; horizontal
(rule-picts->pict/horizontal rtl-superimpose)]))
(define (mk-arrow-pict sz style)
(let ([cache (make-hash)])
(lambda ()
(let ([s (default-font-size)])
((hash-ref cache s
(lambda ()
(let ([f (make-arrow-pict sz style 'roman s)])
(hash-set! cache s f)
f))))))))
(define long-arrow-pict (mk-arrow-pict "xxx" 'straight))
(define short-arrow-pict (mk-arrow-pict "m" 'straight))
(define curvy-arrow-pict (mk-arrow-pict "xxx" 'curvy))
(define short-curvy-arrow-pict (mk-arrow-pict "m" 'curvy))
(define double-arrow-pict (mk-arrow-pict "xxx" 'straight-double))
(define short-double-arrow-pict (mk-arrow-pict "m" 'straight-double))
(define map-arrow-pict (mk-arrow-pict "m" 'map))
(define long-map-arrow-pict (mk-arrow-pict "xxx" 'map))
(define user-arrow-table (make-hasheq))
(define (set-arrow-pict! arr thunk)
(hash-set! user-arrow-table arr thunk))
(define (arrow->pict arr)
(let ([ut (hash-ref user-arrow-table arr #f)])
(if ut
(ut)
(case arr
[(--> -+>) (long-arrow-pict)]
[(==>) (double-arrow-pict)]
[(->) (short-arrow-pict)]
[(=>) (short-double-arrow-pict)]
[(..>) (basic-text "\u21E2" (default-style))]
[(>->) (basic-text "\u21a3" (default-style))]
[(~~>) (curvy-arrow-pict)]
[(~>) (short-curvy-arrow-pict)]
[(:->)
(if STIX?
(basic-text "\u21a6" (default-style))
(map-arrow-pict))]
[(:-->)
(if STIX?
(basic-text "\u27fc" (default-style))
(long-map-arrow-pict))]
[(c->) (basic-text "\u21aa" (default-style))]
[(-->>) (basic-text "\u21a0" (default-style))]
[(>--) (basic-text "\u291a" (default-style))]
[(--<) (basic-text "\u2919" (default-style))]
[(>>--) (basic-text "\u291c" (default-style))]
[(--<<) (basic-text "\u291b" (default-style))]
[else (error 'arrow->pict "unknown arrow ~s" arr)]))))
;
;
;
; ;;;;
; ;;;;
; ;;;; ;;;;;;; ;;;; ;;; ;;;;;;; ;;;; ;;;; ;;;;;;; ;;;;;;; ;;;
; ;;;; ;;;;;;;; ;;;;;;;;; ;;;;;;;; ;;;; ;;;; ;;;;;;;; ;;;;;;;; ;;;;;
; ;;;; ;;;; ;;;; ;;;; ;;; ;;;; ;;;; ;;;; ;;;; ;;; ;;;; ;;;; ;;
; ;;;; ;;;;;;; ;;;; ;;;; ;;;;;;;; ;;;; ;;;; ;;;;;;; ;;;;;;;; ;;;;;;;
; ;;;; ;; ;;;; ;;;; ;;;; ;;;;;;; ;;;; ;;;; ;; ;;;; ;;;;;;; ;;;;;
; ;;;; ;;;;;;;; ;;;; ;;;; ; ;;;; ;;;;;;;;; ;;;;;;;; ; ;;;; ;;;;;;
; ;;;; ;; ;;;; ;;;; ;;;; ;;;;;;;; ;;; ;;;; ;; ;;;; ;;;;;;;; ;;;;
; ;;;;;;;; ;;;;;;;;
; ;;;;;; ;;;;;;
;
;; type flattened-language-pict-info =
;; (listof (cons (listof symbol[nt]) (listof loc-wrapper[rhs])))
;; type language-pict-info =
;; (union (vector flattened-language-pict-info language-pict-info)
;; flattened-language-pict-info)
(define (render-language lang [filename #f] #:nts [nts (render-language-nts)])
(if filename
(save-as-ps (λ () (do-language->pict 'render-language lang nts)) filename)
(parameterize ([dc-for-text-size (make-object bitmap-dc% (make-object bitmap% 1 1))])
(do-language->pict 'render-language lang nts))))
(define (language->pict lang #:nts [nts (render-language-nts)])
(do-language->pict 'language->pict lang nts))
(define (do-language->pict what lang specd-non-terminals)
(let ([all-non-terminals (hash-map (compiled-lang-ht lang) (λ (x y) x))])
(when specd-non-terminals
(check-non-terminals what specd-non-terminals lang))
(make-grammar-pict (compiled-lang-pict-builder lang)
(or specd-non-terminals all-non-terminals)
all-non-terminals)))
(define render-language-nts (make-parameter #f))
(define (check-non-terminals what nts lang)
(let ([langs-nts (language-nts lang)])
(for-each
(λ (nt)
(unless (memq nt langs-nts)
(error what
"the non-terminal ~s is not one of the language's nonterminals (~a)"
nt
(if (null? langs-nts)
"it has no non-terminals"
(apply
string-append
"which are: "
(format "~a" (car langs-nts))
(map (λ (x) (format " ~a" x)) (cdr langs-nts)))))))
nts)))
;; save-as-ps : (-> pict) string -> void
(define (save-as-ps mk-pict filename)
(let ([ps-dc (make-ps-dc filename)])
(parameterize ([dc-for-text-size ps-dc])
(send ps-dc start-doc "x")
(send ps-dc start-page)
(draw-pict (mk-pict) ps-dc 0 0)
(send ps-dc end-page)
(send ps-dc end-doc))))
(define (make-ps-dc filename)
(let ([ps-setup (make-object ps-setup%)])
(send ps-setup copy-from (current-ps-setup))
(send ps-setup set-file filename)
(send ps-setup set-mode 'file)
(parameterize ([current-ps-setup ps-setup])
(make-object post-script-dc% #f #f))))
;; raw-info : language-pict-info
;; nts : (listof symbol) -- the nts that the user expects to see
(define (make-grammar-pict raw-info nts all-nts)
(let* ([info (remove-unwanted-nts nts (flatten-grammar-info raw-info all-nts))]
[term-space
(launder
(ghost
(apply cc-superimpose (map (λ (x) (sequence-of-non-terminals (car x)))
info))))])
(apply vl-append
(map (λ (line)
(htl-append
(rc-superimpose term-space (sequence-of-non-terminals (car line)))
(lw->pict
all-nts
(find-enclosing-loc-wrapper (add-bars-and-::= (cdr line))))))
info))))
(define (sequence-of-non-terminals nts)
(let ([draw-nt (lambda (nt)
(lw->pict nts (build-lw nt 0 0 0 0)))])
(let loop ([nts (cdr nts)]
[pict (draw-nt (car nts))])
(cond
[(null? nts) pict]
[else
(loop (cdr nts)
(hbl-append pict
(non-terminal ", ")
(draw-nt (car nts))))]))))
(define extend-language-show-union (make-parameter #f))
;; remove-unwanted-nts : (listof symbol) flattened-language-pict-info -> flattened-language-pict-info
(define (remove-unwanted-nts nts info)
(filter (λ (x) (not (null? (car x))))
(map
(λ (x) (cons (filter (λ (x) (member x nts)) (car x))
(cdr x)))
info)))
;; flatten-grammar-info : language-pict-info (listof symbol) -> flattened-language-pict-info
(define (flatten-grammar-info info all-nts)
(let ([union? (extend-language-show-union)])
(let loop ([info info])
(cond
[(vector? info)
(let ([orig (loop (vector-ref info 0))]
[extensions (vector-ref info 1)])
(if union?
(map (λ (orig-line)
(let* ([nt (car orig-line)]
[extension (assoc nt extensions)])
(if extension
(let ([rhss (cdr extension)])
(cons nt
(map (λ (x)
(if (and (lw? x) (eq? '.... (lw-e x)))
(struct-copy lw
x
[e
(lw->pict all-nts
(find-enclosing-loc-wrapper
(add-bars (cdr orig-line))))])
x))
(cdr extension))))
orig-line)))
orig)
extensions))]
[else info]))))
(define (make-::=) (basic-text " ::= " (default-style)))
(define (make-bar)
(basic-text " | " (default-style))
#;
(let ([p (basic-text " | " (default-style))])
(dc
(λ (dc dx dy)
(cond
[(is-a? dc post-script-dc%)
(let ([old-pen (send dc get-pen)])
(send dc set-pen "black" .6 'solid)
(send dc draw-line
(+ dx (/ (pict-width p) 2)) dy
(+ dx (/ (pict-width p) 2)) (+ dy (pict-height p)))
(send dc set-pen old-pen))]
[else
(send dc draw-text " | " dx dy)]))
(pict-width p)
(pict-height p)
(pict-ascent p)
(pict-descent p))))
(define (add-bars-and-::= lst)
(cond
[(null? lst) null]
[else
(cons
(let ([fst (car lst)])
(build-lw
(rc-superimpose (ghost (make-bar)) (make-::=))
(lw-line fst)
(lw-line-span fst)
(lw-column fst)
0))
(let loop ([fst (car lst)]
[rst (cdr lst)])
(cond
[(null? rst) (list fst)]
[else
(let* ([snd (car rst)]
[bar
(cond
[(= (lw-line snd)
(lw-line fst))
(let* ([line (lw-line snd)]
[line-span (lw-line-span snd)]
[column (+ (lw-column fst)
(lw-column-span fst))]
[column-span
(max (- (lw-column snd)
(+ (lw-column fst)
(lw-column-span fst)))
0)])
(build-lw (make-bar) line line-span column column-span))]
[else
(build-lw
(rc-superimpose (make-bar) (ghost (make-::=)))
(lw-line snd)
(lw-line-span snd)
(lw-column snd)
0)])])
(list* fst
bar
(loop snd (cdr rst))))])))]))
(define (add-bars lst)
(let loop ([fst (car lst)]
[rst (cdr lst)])
(cond
[(null? rst) (list fst)]
[else
(let* ([snd (car rst)]
[bar
(cond
[(= (lw-line snd)
(lw-line fst))
(let* ([line (lw-line snd)]
[line-span (lw-line-span snd)]
[column (+ (lw-column fst)
(lw-column-span fst))]
[column-span
(- (lw-column snd)
(+ (lw-column fst)
(lw-column-span fst)))])
(build-lw (make-bar) line line-span column column-span))]
[else
(build-lw
(make-bar)
(lw-line snd)
(lw-line-span snd)
(lw-column snd)
0)])])
(list* fst
bar
(loop snd (cdr rst))))])))
;
;
;
; ; ;;; ; ;;
; ;; ;;;; ;; ;;
; ;;;;;;; ;;;; ;;; ;;;;; ;;;;;;; ;;;;; ;;;; ;;;; ;;;; ;;; ;;;;; ;;;;; ;;;; ;;;; ;;;
; ;;;;;;;;;;;;; ;;;;; ;;;;;; ;;;;;;;; ;;;; ;;;; ;;;; ;;;;;;;;; ;;;;;; ;;;;;; ;;;; ;;;;;; ;;;;;;;;;
; ;;;; ;;; ;;;; ;;;; ;; ;;;; ;;;; ;;;;;; ;;;; ;;;; ;;;; ;;;; ;;;;;;; ;;;; ;;;; ;;;;;;;; ;;;; ;;;;
; ;;;; ;;; ;;;; ;;;;;;; ;;;; ;;;;;;; ;;;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;; ;;;; ;;;;
; ;;;; ;;; ;;;; ;;;;; ;;;;; ;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;; ;;;;;;; ;;;;; ;;;; ;;;;;;;; ;;;; ;;;;
; ;;;; ;;; ;;;; ;;;;;; ;;;;; ;;;;;;;; ;;;; ;;;;;;;;; ;;;; ;;;; ;;;;;; ;;;;; ;;;; ;;;;;; ;;;; ;;;;
; ;;;; ;;; ;;;; ;;;; ;;;; ;; ;;;; ;;;; ;;; ;;;; ;;;; ;;;; ;;;;; ;;;; ;;;; ;;;; ;;;; ;;;;
;
;
;
(define (make-=) (basic-text " = " (default-style)))
(define-syntax (metafunction->pict stx)
(syntax-case stx ()
[(_ name)
(identifier? #'name)
#'(metafunctions->pict name)]))
(define-syntax (metafunctions->pict stx)
(syntax-case stx ()
[(_ name1 name2 ...)
(and (identifier? #'name1)
(andmap identifier? (syntax->list #'(name2 ...))))
#'(metafunctions->pict/proc (list (metafunction name1) (metafunction name2) ...) 'metafunctions->pict)]))
(define-syntax (render-metafunctions stx)
(syntax-case stx ()
[(_ name1 name2 ...)
(and (identifier? #'name)
(andmap identifier? (syntax->list #'(name2 ...))))
#'(render-metafunction/proc (list (metafunction name1) (metafunction name2) ...) #f 'render-metafunctions)]
[(_ name1 name2 ... #:file filename)
(and (identifier? #'name1)
(andmap identifier? (syntax->list #'(name2 ...))))
#'(render-metafunction/proc (list (metafunction name1) (metafunction name2) ...) filename 'render-metafunctions)]))
(define-syntax (render-metafunction stx)
(syntax-case stx ()
[(_ name)
(identifier? #'name)
#'(render-metafunction/proc (list (metafunction name)) #f 'render-metafunction)]
[(_ name file)
(identifier? #'name)
#'(render-metafunction/proc (list (metafunction name)) file 'render-metafunction)]))
(define linebreaks (make-parameter #f))
(define metafunction-pict-style (make-parameter 'left-right))
(define metafunction-cases (make-parameter #f))
(define (select-cases eqns)
(let ([cases (metafunction-cases)])
(if cases
(let loop ([eqns eqns]
[cases (remove-dups (sort cases <))]
[i 0])
(cond
[(null? eqns) null]
[(null? cases) null]
[else
(cond
[(= i (car cases))
(cons (car eqns)
(loop (cdr eqns) (cdr cases) (+ i 1)))]
[else
(loop (cdr eqns) cases (+ i 1))])]))
eqns)))
;; remove-dups : (listof number)[sorted] -> (listof number)[sorted]
;; removes duplicate numbers from 'l'
(define (remove-dups l)
(let loop ([l l])
(cond
[(null? (cdr l)) l]
[(= (car l) (cadr l))
(loop (cdr l))]
[else
(cons (car l) (loop (cdr l)))])))
(define (metafunctions->pict/proc mfs name)
(unless (andmap (λ (mf) (eq? (metafunc-proc-lang (metafunction-proc (car mfs)))
(metafunc-proc-lang (metafunction-proc mf))))
mfs)
(error name "expected metafunctions that are all drawn from the same language"))
(let* ([current-linebreaks (linebreaks)]
[all-nts (language-nts (metafunc-proc-lang (metafunction-proc (car mfs))))]
[sep 2]
[style (metafunction-pict-style)]
[wrapper->pict (lambda (lw) (lw->pict all-nts lw))]
[all-eqns (apply append (map (λ (mf) (metafunc-proc-pict-info (metafunction-proc mf))) mfs))]
[all-lhss
(apply append
(map (λ (mf)
(map (lambda (eqn)
(wrapper->pict
(metafunction-call (metafunc-proc-name (metafunction-proc mf))
(list-ref eqn 0)
(metafunc-proc-multi-arg? (metafunction-proc mf)))))
(metafunc-proc-pict-info (metafunction-proc mf))))
mfs))]
[eqns (select-cases all-eqns)]
[lhss (select-cases all-lhss)]
[rhss (map (lambda (eqn) (wrapper->pict (list-ref eqn 2))) eqns)]
[linebreak-list (or current-linebreaks
(map (lambda (x) #f) eqns))]
[=-pict (make-=)]
[max-lhs-w (apply max (map pict-width lhss))]
[max-line-w/pre-sc (apply
max
(map (lambda (lhs rhs linebreak?)
(max
(if (or linebreak?
(memq style '(up-down
up-down/vertical-side-conditions
up-down/compact-side-conditions)))
(max (pict-width lhs)
(+ (pict-width rhs) (pict-width =-pict)))
(+ (pict-width lhs) (pict-width rhs) (pict-width =-pict)
(* 2 sep)))))
lhss rhss linebreak-list))]
[scs (map (lambda (eqn)
(let ([scs (reverse (list-ref eqn 1))])
(if (null? scs)
#f
(let-values ([(fresh where/sc) (partition metafunc-extra-fresh? scs)])
(side-condition-pict (foldl (λ (clause picts)
(foldr (λ (l ps) (cons (wrapper->pict l) ps))
picts (metafunc-extra-fresh-vars clause)))
'() fresh)
(map (match-lambda
[(struct metafunc-extra-where (lhs rhs))
(cons (wrapper->pict lhs) (wrapper->pict rhs))]
[(struct metafunc-extra-side-cond (expr))
(wrapper->pict expr)])
where/sc)
(if (memq style '(up-down/vertical-side-conditions
left-right/vertical-side-conditions
left-right*/vertical-side-conditions))
0
(if (memq style '(up-down/compact-side-conditions
left-right/compact-side-conditions
left-right*/compact-side-conditions))
max-line-w/pre-sc
+inf.0)))))))
eqns)])
(case style
[(left-right left-right/vertical-side-conditions left-right/compact-side-conditions left-right/beside-side-conditions)
(table 3
(apply append
(map (lambda (lhs sc rhs linebreak?)
(append
(if linebreak?
(list lhs (blank) (blank))
(if (and sc (eq? style 'left-right/beside-side-conditions))
(list lhs =-pict (htl-append 10 rhs sc))
(list lhs =-pict rhs)))
(if linebreak?
(let ([p rhs])
(list (htl-append sep
=-pict
(inset p 0 0 (- 5 (pict-width p)) 0))
(blank)
;; n case this line sets the max width, add suitable space in the right:
(blank (max 0 (- (pict-width p) max-lhs-w sep))
0)))
null)
(if (or (not sc)
(and (not linebreak?)
(eq? style 'left-right/beside-side-conditions)))
null
(list (inset sc 0 0 (- 5 (pict-width sc)) 0)
(blank)
;; In case sc set the max width...
(blank (max 0 (- (pict-width sc) max-lhs-w (pict-width =-pict) (* 2 sep)))
0)))))
lhss
scs
rhss
linebreak-list))
ltl-superimpose ltl-superimpose
sep sep)]
[(up-down up-down/vertical-side-conditions up-down/compact-side-conditions)
(panorama
;; the side-conditions may hang outside the pict, so bring them back w/ panorama
(apply vl-append
sep
(apply append
(map (lambda (lhs sc rhs)
(cons
(vl-append (htl-append lhs =-pict) rhs)
(if (not sc)
null
(list (inset sc 0 0 (- 5 (pict-width sc)) 0)))))
lhss
scs
rhss))))])))
(define (metafunction-call name an-lw flattened?)
(if flattened?
(struct-copy lw an-lw
[e
(list*
;; the first loc wrapper is just there to make the
;; shape of this line be one that the apply-rewrites
;; function (in core-layout.ss) recognizes as a metafunction
(make-lw "("
(lw-line an-lw)
0
(lw-column an-lw)
0
#f
#f)
(make-lw name
(lw-line an-lw)
0
(lw-column an-lw)
0
#f
#t)
(cdr (lw-e an-lw)))])
(build-lw
(list
(build-lw "("
(lw-line an-lw)
0
(lw-column an-lw)
0)
(make-lw name
(lw-line an-lw)
0
(lw-column an-lw)
0
#f
#t)
an-lw
(build-lw ")"
(+ (lw-line an-lw)
(lw-line-span an-lw))
0
(+ (lw-column an-lw)
(lw-column-span an-lw))
0))
(lw-line an-lw)
(lw-line-span an-lw)
(lw-column an-lw)
(lw-column-span an-lw))))
(define (add-commas-and-rewrite-parens eles)
(let loop ([eles eles]
[between-parens? #f]
[comma-pending #f])
(cond
[(null? eles) null]
[else
(let ([an-lw (car eles)])
(cond
[(not (lw? an-lw))
(cons an-lw (loop (cdr eles) between-parens? #f))]
[(equal? "(" (lw-e an-lw))
(cons (struct-copy lw
an-lw
[e (open-white-square-bracket)])
(loop (cdr eles) #t #f))]
[(equal? ")" (lw-e an-lw))
(cons (struct-copy lw
an-lw
[e (close-white-square-bracket)])
(loop (cdr eles) #f #f))]
[(and between-parens?
comma-pending)
(list* (build-lw (basic-text ", " (default-style))
(car comma-pending)
0
(cdr comma-pending)
0)
'spring
(loop eles #t #f))]
[else
(cons an-lw
(loop (cdr eles)
between-parens?
(if between-parens?
(cons (+ (lw-line an-lw) (lw-line-span an-lw))
(+ (lw-column an-lw) (lw-column-span an-lw)))
#f)))]))])))
(define (replace-paren x)
(cond
[(not (lw? x)) x]
[(equal? "(" (lw-e x))
(struct-copy lw
x
[e (hbl-append -2
(basic-text "[" (default-style))
(basic-text "[" (default-style)))])]
[(equal? ")" (lw-e x))
(struct-copy lw
x
[e
(hbl-append -2
(basic-text "]" (default-style))
(basic-text "]" (default-style)))])]
[else x]))
(define (render-metafunction/proc mfs filename name)
(cond
[filename
(save-as-ps (λ () (metafunctions->pict/proc mfs name))
filename)]
[else
(parameterize ([dc-for-text-size (make-object bitmap-dc% (make-object bitmap% 1 1))])
(metafunctions->pict/proc mfs name))]))
;
;
;
;
; ;
; ;
; ;;; ;;; ; ;; ;;;;;
; ; ; ; ;; ; ; ; ;
; ; ;;;;; ; ; ; ; ;
; ; ; ; ; ; ;
; ; ; ; ; ; ; ;
; ;; ;;; ; ; ; ;
;
;
;
(define-syntax (render-term stx)
(syntax-case stx ()
[(_ lang term)
#'(render-term/proc lang (to-lw term))]
[(_ lang term filename)
#'(render-term/proc lang (to-lw term) filename)]))
(define-syntax (term->pict stx)
(syntax-case stx ()
[(_ lang term)
#'(do-term->pict lang (to-lw term))]))
(define (render-term/proc lang lw [filename #f])
(if filename
(save-as-ps (λ () (do-term->pict lang lw)) filename)
(parameterize ([dc-for-text-size (make-object bitmap-dc% (make-object bitmap% 1 1))])
(do-term->pict lang lw))))
(define (do-term->pict lang lw) (lw->pict (language-nts lang) lw))