You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
typesetting/quad/qtest/typewriter.rkt

180 lines
8.0 KiB
Racket

This file contains invisible Unicode characters!

This file contains invisible Unicode characters that may be processed differently from what appears below. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to reveal hidden characters.

#lang debug racket
(require quad racket/class)
(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)
(provide (rename-out [mb #%module-begin]) (except-out (all-from-out racket) #%module-begin))
(define-runtime-path charter "fonts/charter.ttf")
(define (soft-break? q)
(and (quad? q)
(or (memv (car (quad-elems q)) '(#\space #\- #\u00AD))
(member (car (quad-elems q)) (map string '(#\space #\- #\u00AD))))))
(define (draw-debug q doc)
(save doc)
(line-width doc 0.25)
(apply rect doc (append (send q origin) (send q size)))
(stroke doc "#fcc")
(apply rect doc (append (send q origin) (send q size)))
(clip doc)
(circle doc (pt-x (in-point q)) (pt-y (in-point q)) 1)
(circle doc (pt-x (out-point q)) (pt-y (out-point q)) 1)
(fill doc "#f99")
(restore doc))
(define draw-counter 0)
(define $textish (q #:in 'bi
#:out 'bo
#:printable (λ (q [sig #f])
(case (car (quad-elems q))
[(" " #\u00AD) (λ (sig) (memq sig '(end)))]
[(" " #\space) (λ (sig) (not (memq sig '(start end))))]
[else #true]))
#:draw (λ (q doc)
(set! draw-counter (add1 draw-counter ))
(font-size doc (string->number (hash-ref (quad-attrs q) 'fontsize "12")))
(let ([str (car (quad-elems q))])
(cond
[(hash-has-key? (quad-attrs q) 'link)
(save doc)
(fill-color doc "blue")
(text doc str (first (quad-origin q)) (second (quad-origin q))
#:link (hash-ref (quad-attrs q) 'link))
(restore doc)]
[else
#;(println str)
(void)
(apply text doc str (quad-origin q))])))))
(define (quadify doc q)
(struct-copy quad $textish
[attrs (let ([h (quad-attrs q)]) (hash-set! h 'font charter) h)]
[elems (quad-elems q)]
[size (delay
(define fontsize (string->number (hash-ref (quad-attrs q) 'fontsize "12")))
(define str (car (quad-elems q)))
(font-size doc fontsize)
(font doc (path->string charter))
(pt
(string-width doc str)
(current-line-height doc)))]))
(define line-height 16)
(define $line (q #:attrs (hasheq 'type "line")
#:size (pt +inf.0 line-height)
#:out 'sw
#:printable #true))
(define $page (q #:attrs (hasheq 'type "page")
#:offset '(36 36)
#:draw-start (λ (q doc)
(add-page doc)
(font-size doc 10)
(define str (string-append "page " (number->string page-count)))
;; page number
(save doc)
(fill-color doc "blue")
(text doc str 10 10 #:link "https://practicaltypography.com")
(restore doc)
(set! page-count (add1 page-count)))))
(define $doc (q #:draw-start (λ (q doc) (start-doc doc))
#:draw-end (λ (q doc) (end-doc doc))))
(struct $break quad ())
(define page-count 1)
(define (make-break . xs) (q #:type $break
#:printable #f
#:size '(0 0)
#:elems xs))
(define (consolidate-runs pcs)
(for/fold ([runs empty]
[pcs pcs]
#:result (reverse runs))
([i (in-naturals)]
#:break (empty? pcs))
(define-values (run-pcs rest) (splitf-at pcs (λ (p) (same-run? (car pcs) p))))
(define new-run (struct-copy quad $textish
[attrs (quad-attrs (car pcs))]
[elems (merge-adjacent-strings (apply append (for/list ([pc (in-list run-pcs)])
(quad-elems pc))))]
[size (delay (pt (for/sum ([pc (in-list run-pcs)])
(pt-x (size pc)))
(pt-y (size (car pcs)))))]))
(values (cons new-run runs) rest)))
(define consolidate-into-runs? #t)
(define (line-wrap xs size [debug #f])
(wrap xs size debug
#:soft-break soft-break?
#:finish-wrap (λ (pcs q idx) (list (struct-copy quad $line
[elems
;; consolidate chars into a single run (naively)
;; by taking attributes from first (including origin)
;; this only works because there's only one run per line
;; that is, it suffices to position the first letter
(if consolidate-into-runs?
(consolidate-runs pcs)
pcs)])))))
(define (page-wrap xs size [debug #f])
(wrap xs size debug
#:finish-wrap (λ (pcs q idx) (list (struct-copy quad $page
[elems pcs])))))
(define (typeset pdf qarg)
(define chars 65)
(define line-width (* 7.2 chars))
(define lines-per-page (* 40 line-height))
(time-name config-pdf
(font pdf (path->string charter))
(font-size pdf 12))
(let* ([x (time-name runify (runify qarg))]
[x (time-name quadify (map (λ (x) (quadify pdf x)) x))]
[x (time-name line-wrap (line-wrap x line-width))]
[x (time-name page-wrap (page-wrap x lines-per-page))]
[x (time-name position (position (struct-copy quad $doc
[elems x])))])
x))
(define (run qin [path "test.pdf"])
(define pdf (time-name make-pdf (make-pdf #:compress #t
#:auto-first-page #f
#:output-path path)))
(define q (typeset pdf qin))
(report draw-counter)
(time-name draw (draw q pdf))
(report draw-counter))
(require pollen/tag)
(define quad-tag (default-tag-function 'quad))
(provide (rename-out [quad-tag quad]))
(define-syntax (mb stx)
(syntax-case stx ()
[(_ . ARGS)
(with-syntax ([PS (syntax-property #'ARGS 'ps)]
[(REP . QS) #'ARGS])
#'(#%module-begin
(define qs (list . QS))
(define lotsa-qs (append* (make-list (string->number (string-trim REP)) qs)))
(run (qexpr->quad (apply quad-tag #:fontsize "14" lotsa-qs)) PS)
(void)))]))
(module reader syntax/module-reader
qtest/typewriter
#:read quad-read
#:read-syntax quad-read-syntax
#:whole-body-readers? #t ;; need this to make at-reader work
(require scribble/reader)
(define (quad-read p) (syntax->datum (quad-read-syntax (object-name p) p)))
(define (quad-read-syntax path-string p)
(define quad-at-reader (make-at-reader
#:syntax? #t
#:inside? #t
#:command-char #\◊))
(syntax-property (quad-at-reader path-string p) 'ps (path-replace-extension path-string #".pdf"))))