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55 lines
2.4 KiB
Racket
55 lines
2.4 KiB
Racket
#lang debug racket/base
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(require racket/string
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racket/format
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racket/match
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"attr.rkt"
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"quad.rkt"
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"pipeline.rkt"
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"struct.rkt")
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(provide (all-defined-out))
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(define-pass (make-drawing-insts qs)
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;; TODO: stronger precondition. but `has-position?` is too strong
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#:pre (list-of quad?)
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#:post (list-of $drawing-inst?)
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(apply append
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(let ([current-font #false])
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(for/list ([q (in-list qs)])
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(cond
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[(eq? bod q) (list ($doc-start))]
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[(eq? eod q) (list ($doc-end))]
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[(bop-quad? q) (list ($page-start (quad-ref q :page-width) (quad-ref q :page-height)))]
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[(eop-quad? q) (list ($page-end))]
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[(quad? q)
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(append
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(match (quad-ref q :font-path)
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[(== current-font) null]
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[font-path
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(set! current-font font-path)
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(list ($font font-path))])
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(if (pair? (quad-elems q))
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(list ($move (quad-origin q)) ($text (char->integer (car (string->list (car (quad-elems q)))))))
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null))]
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[else (raise-argument-error 'make-drawing-insts "known thing" q)])))))
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(define valid-tokens '(doc-start doc-end page-start page-end text move set-font))
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(define-pass (stackify xs)
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#:pre (list-of $drawing-inst?)
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#:post string?
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(define move-points (map $move-posn (filter $move? xs)))
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(define xmax (if (pair? move-points) (add1 (apply max (map $point-x move-points))) 0))
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(define ymax (if (pair? move-points) (add1 (apply max (map $point-y move-points))) 0))
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(string-join
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(for/list ([x (in-list xs)])
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(string-join (map ~a (match x
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;; TODO: embed these code-generating functions
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;; as properties of the structs
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[($move ($point x y)) (list y x 'move)]
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[($text charint) (list charint 'text)]
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[($font path-string) (list path-string 'set-font)]
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[($doc-start) '(doc-start)]
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[($doc-end) '(doc-end)]
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[($page-start width height) (list height width 'page-start)]
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[($page-end) '(page-end)]
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[_ (error 'unknown-drawing-inst)])) " ")) "\n")) |