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#lang debug racket
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(require quad racket/class)
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(require racket/promise racket/list sugar/debug pitfall/pdf pitfall/vector pitfall/font pitfall/annotation pitfall/color pitfall/text fontland/font racket/runtime-path pollen/tag)
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(provide (rename-out [mb #%module-begin]) (except-out (all-from-out racket) #%module-begin))
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(define-runtime-path charter "fonts/charter.ttf")
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(define (soft-break? q)
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(and (quad? q)
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(or (memv (car (get-field elems q)) '(#\space #\- #\u00AD))
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(member (car (get-field elems q)) (map string '(#\space #\- #\u00AD))))))
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(define (draw-debug q doc)
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(save doc)
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(line-width doc 0.25)
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(apply rect doc (append (send q origin) (send q size)))
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(stroke doc "#fcc")
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(apply rect doc (append (send q origin) (send q size)))
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(clip doc)
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(circle doc (pt-x (in-point q)) (pt-y (in-point q)) 1)
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(circle doc (pt-x (out-point q)) (pt-y (out-point q)) 1)
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(fill doc "#f99")
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(restore doc))
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(define draw-counter 0)
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(define textish%
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(class quad%
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(super-new)
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(inherit-field [@size size] [@elems elems]
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[@attrs attrs] [@origin origin] [@in in] [@out out])
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(set! @in 'bi)
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(set! @out 'bo)
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(define/override (printable? [sig #f])
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(case (car @elems)
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[(" " #\u00AD) (λ (sig) (memq sig '(end)))]
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[(" " #\space) (λ (sig) (not (memq sig '(start end))))]
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[else #true]))
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(define/override (draw doc)
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(set! draw-counter (add1 draw-counter ))
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(font-size doc (string->number (hash-ref @attrs 'fontsize "12")))
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(let ([str (car @elems)])
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(cond
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[(hash-has-key? @attrs 'link)
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(save doc)
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(fill-color doc "blue")
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(text doc str (first @origin) (second @origin) (hasheq 'link (hash-ref @attrs 'link)))
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(restore doc)]
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[else
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#;(println str)
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(void)
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(apply text doc str @origin)])))))
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(define quadify%
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(class textish%
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(super-new)
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(init-field doc)
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(inherit-field [@size size] [@elems elems] [@attrs attrs])
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(set! @size
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(delay
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(define fontsize (string->number (hash-ref @attrs 'fontsize "12")))
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(define str (car @elems))
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(font-size doc fontsize)
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(font doc (path->string charter))
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(list
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(string-width doc str)
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(current-line-height doc))))))
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(define (quadify doc q)
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(make-object quadify% doc (hash-set* (get-field attrs q) 'font charter) (get-field elems q)))
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(define line% (class quad% (super-new)
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(set-field! size this (list +inf.0 line-height))
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(set-field! out this 'sw)))
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(define page% (class quad% (super-new)
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(set-field! offset this'(36 36))
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(define/override (start doc)
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(add-page doc)
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(font-size doc 10)
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(define str (string-append "page " (number->string page-count)))
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;; page number
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(save doc)
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(fill-color doc "blue")
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(text doc str 10 10 (hasheq 'link "https://practicaltypography.com"))
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(restore doc)
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(set! page-count (add1 page-count)))))
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(define doc% (class quad% (super-new)
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(define/override (start doc) (start-doc doc))
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(define/override (end doc) (end-doc doc))))
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(define break% (class quad% (super-new)))
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(define page-count 1)
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(define (make-break . xs) (make-object break% (hasheq 'printable? #f 'size '(0 0)) xs))
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(define (consolidate-runs pcs)
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(for/fold ([runs empty]
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[pcs pcs]
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#:result (reverse runs))
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([i (in-naturals)]
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#:break (empty? pcs))
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(define-values (run-pcs rest) (splitf-at pcs (λ (p) (same-run? (car pcs) p))))
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(define new-run (make-object textish% (get-field attrs (car pcs)) (get-field elems (car pcs))))
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(set-field! size new-run (delay (list (for/sum ([pc (in-list run-pcs)])
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(pt-x (send pc size)))
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(pt-y (send (car pcs) size)))))
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(set-field! elems new-run (merge-adjacent-strings (apply append (for/list ([pc (in-list run-pcs)])
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(get-field elems pc)))))
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(values (cons new-run runs) rest)))
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(define line-height 16)
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(define consolidate-into-runs? #t)
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(define (line-wrap xs size [debug #f])
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(break xs size debug
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#:break-val (make-break #\newline)
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#:soft-break-proc soft-break?
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#:finish-wrap-proc (λ (pcs) (list (make-object line% (hasheq)
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;; consolidate chars into a single run (naively)
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;; by taking attributes from first (including origin)
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;; this only works because there's only one run per line
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;; that is, it suffices to position the first letter
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(if consolidate-into-runs?
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(consolidate-runs pcs)
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pcs))))))
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;; 181231 it's weird that setup work for page is in the page break,
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;; which is between pages, not associated with either
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(define pb (make-object (let ([pb (class break%
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(super-new)
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(define/override (printable?) #f)
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(inherit-field (@size size))
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(set! @size '(0 0)))])
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pb) '(#\page)))
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(define ($break? x) (is-a? x break%))
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(define (page-wrap xs size [debug #f])
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(break xs size debug
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#:break-before? #t
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#:break-val pb
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#:soft-break-proc $break?
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#:finish-wrap-proc (λ (pcs) (list (make-object page% (hasheq) (filter-not $break? pcs))))))
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(define (typeset pdf qarg)
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(define chars 65)
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(define line-width (* 7.2 chars))
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(define lines-per-page (* 40 line-height))
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(time-name config-pdf
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[font pdf (path->string charter)]
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[font-size pdf 12])
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(let* ([x (time-name runify (runify qarg))]
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[x (time-name quadify (map (λ (x) (quadify pdf x)) x))]
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[x (time-name line-wrap (line-wrap x line-width))]
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[x (time-name page-wrap (page-wrap x lines-per-page))]
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[x (time-name position (position (make-object doc% (hasheq) x)))])
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x))
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(define (run qin [path "test.pdf"])
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(define pdf (time-name make-pdf (make-pdf #:compress #t)))
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(define q (typeset pdf qin))
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(report draw-counter)
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(time-name draw (with-output-to-file path (λ () (send q draw pdf)) #:exists 'replace))
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(report draw-counter))
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(define-syntax (mb stx)
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(syntax-case stx ()
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[(_ . ARGS)
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(with-syntax ([PS (syntax-property #'ARGS 'ps)]
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[(REP . QS) #'ARGS])
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#'(#%module-begin
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(define qs (list . QS))
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(define lotsa-qs (append* (make-list (string->number (string-trim REP)) qs)))
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(run (qexpr->quad (apply quad #:fontsize "12" lotsa-qs)) PS)
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(void)))]))
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(define quad (default-tag-function 'quad))
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(provide quad)
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(module reader syntax/module-reader
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qtest/typewriter
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#:read quad-read
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#:read-syntax quad-read-syntax
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#:whole-body-readers? #t ;; need this to make at-reader work
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(require scribble/reader)
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(define (quad-read p) (syntax->datum (quad-read-syntax (object-name p) p)))
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(define (quad-read-syntax path-string p)
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(define quad-at-reader (make-at-reader
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#:syntax? #t
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#:inside? #t
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#:command-char #\◊))
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(syntax-property (quad-at-reader path-string p) 'ps (path-replace-extension path-string #".pdf"))))
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