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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 (quad-elems q)) '(#\space #\- #\u00AD))
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(member (car (quad-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 (q #:in 'bi
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#:out 'bo
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#:printable (λ (q [sig #f])
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(case (car (quad-elems q))
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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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#:draw (λ (q doc)
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(set! draw-counter (add1 draw-counter ))
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(font-size doc (string->number (hash-ref (quad-attrs q) 'fontsize "12")))
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(let ([str (car (quad-elems q))])
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(cond
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[(hash-has-key? (quad-attrs q) 'link)
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(save doc)
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(fill-color doc "blue")
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(text doc str (first (quad-origin q)) (second (quad-origin q)) (hasheq 'link (hash-ref (quad-attrs q) '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 (quad-origin q))])))))
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(define (quadify doc q)
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(struct-copy quad $textish
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[attrs (let ([h (quad-attrs q)]) (hash-set! h 'font charter) h)]
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[elems (quad-elems q)]
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[size (delay
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(define fontsize (string->number (hash-ref (quad-attrs q) 'fontsize "12")))
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(define str (car (quad-elems q)))
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(font-size doc fontsize)
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(font doc (path->string charter))
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(pt
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(string-width doc str)
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(current-line-height doc)))]))
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(define line-height 16)
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(define $line (q #:attrs (hasheq 'type "line")
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#:size (pt +inf.0 line-height)
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#:out 'sw
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#:printable #true))
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(define $page (q #:attrs (hasheq 'type "page")
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#:offset '(36 36)
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#:pre-draw (λ (q 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 (q #:pre-draw (λ (q doc) (start-doc doc))
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#:post-draw (λ (q doc) (end-doc doc))))
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(struct $break quad ())
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(define page-count 1)
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(define (make-break . xs) (q #:type $break
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#:printable #f
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#:size '(0 0)
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#:elems 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 (struct-copy quad $textish
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[attrs (quad-attrs (car pcs))]
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[elems (merge-adjacent-strings (apply append (for/list ([pc (in-list run-pcs)])
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(quad-elems pc))))]
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[size (delay (pt (for/sum ([pc (in-list run-pcs)])
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(pt-x (size pc)))
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(pt-y (size (car pcs)))))]))
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(values (cons new-run runs) rest)))
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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 (struct-copy quad $line
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[elems
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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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(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 (q #:type $break)
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#:soft-break-proc $break?
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#:finish-wrap-proc (λ (pcs) (list (struct-copy quad $page
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[elems (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 (struct-copy quad $doc
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[elems 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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#:auto-first-page #f
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#:output-path path)))
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(define q (typeset pdf qin))
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(report draw-counter)
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(time-name draw (draw q pdf))
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(report draw-counter))
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(require pollen/tag)
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(define quad-tag (default-tag-function 'quad))
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(provide (rename-out [quad-tag quad]))
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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-tag #:fontsize "14" lotsa-qs)) PS)
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(void)))]))
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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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