|
|
#lang debug racket/base
|
|
|
(require (for-syntax)
|
|
|
racket/promise
|
|
|
racket/match
|
|
|
racket/list
|
|
|
sugar/list
|
|
|
racket/date
|
|
|
pitfall
|
|
|
quad
|
|
|
sugar/debug
|
|
|
racket/unsafe/ops
|
|
|
hyphenate
|
|
|
"attrs.rkt"
|
|
|
"param.rkt"
|
|
|
"font.rkt")
|
|
|
(provide hrbr lbr pbr render-pdf)
|
|
|
|
|
|
(define-quad string-quad quad ())
|
|
|
|
|
|
(define (q:string-draw q doc)
|
|
|
;; draw with pdf text routine (when (pair? (quad-elems q))
|
|
|
(font doc (path->string (quad-ref q font-path-key default-font-face)))
|
|
|
(font-size doc (quad-ref q 'font-size 12))
|
|
|
(fill-color doc (quad-ref q 'color "black"))
|
|
|
(define str (unsafe-car (quad-elems q)))
|
|
|
(match-define (list x y) (quad-origin q))
|
|
|
(text doc str x y
|
|
|
#:tracking (quad-ref q 'character-tracking 0)
|
|
|
#:bg (quad-ref q 'bg)
|
|
|
#:features (list (cons #"tnum" 1))
|
|
|
#:link (quad-ref q 'link)))
|
|
|
|
|
|
(define (q:string-draw-end q doc)
|
|
|
(when (draw-debug-string?)
|
|
|
(draw-debug q doc "#99f" "#ccf")))
|
|
|
|
|
|
(define (q:string-printable? q [sig #f])
|
|
|
;; printable unless single space, which is not printable at start or end
|
|
|
(match (quad-elems q)
|
|
|
[(cons elem _)
|
|
|
(case elem
|
|
|
[(" " #\space) (not (memq sig '(start end)))]
|
|
|
[else #true])]
|
|
|
[_ #true]))
|
|
|
|
|
|
(define q:string (q #:type string-quad
|
|
|
#:in 'baseline-in
|
|
|
#:out 'baseline-out
|
|
|
#:printable q:string-printable?
|
|
|
#:draw q:string-draw
|
|
|
#:draw-end q:string-draw-end))
|
|
|
|
|
|
(define (make-size-promise q [str-arg #f])
|
|
|
(delay
|
|
|
(define pdf (current-pdf))
|
|
|
(define str
|
|
|
(cond
|
|
|
[str-arg]
|
|
|
[(pair? (quad-elems q)) (unsafe-car (quad-elems q))]
|
|
|
[else #false]))
|
|
|
(define string-size
|
|
|
(cond
|
|
|
[str
|
|
|
(font-size pdf (quad-ref q 'font-size default-font-size))
|
|
|
(font pdf (path->string (quad-ref q font-path-key default-font-face)))
|
|
|
(+ (string-width pdf str
|
|
|
#:tracking (quad-ref q 'character-tracking 0))
|
|
|
;; add one more dose because `string-width` only adds it intercharacter,
|
|
|
;; and this quad will be adjacent to another
|
|
|
;; (so we need to account for the "inter-quad" space
|
|
|
(quad-ref q 'character-tracking 0))]
|
|
|
[else 0]))
|
|
|
(list string-size (quad-ref q 'line-height (current-line-height pdf)))))
|
|
|
|
|
|
(define (->string-quad q)
|
|
|
(cond
|
|
|
[(line-break? q) q]
|
|
|
[else
|
|
|
(struct-copy
|
|
|
quad q:string
|
|
|
[attrs (let ([attrs (quad-attrs q)])
|
|
|
(hash-ref! attrs 'font-size default-font-size)
|
|
|
attrs)]
|
|
|
[elems (quad-elems q)]
|
|
|
[size (make-size-promise q)])]))
|
|
|
|
|
|
|
|
|
(define (draw-debug q doc [fill-color "#f99"] [stroke-color "#fcc"])
|
|
|
(when (draw-debug?)
|
|
|
(save doc)
|
|
|
(line-width doc 0.5)
|
|
|
(apply rect doc (append (quad-origin q) (size q)))
|
|
|
(stroke doc stroke-color)
|
|
|
(circle doc (pt-x (in-point q)) (pt-y (in-point q)) 2)
|
|
|
(circle doc (pt-x (out-point q)) (pt-y (out-point q)) 2)
|
|
|
(fill doc fill-color)
|
|
|
(rect-centered doc (pt-x (inner-point q)) (pt-y (inner-point q)) 2)
|
|
|
(fill doc stroke-color)
|
|
|
(restore doc)))
|
|
|
|
|
|
(define q:line (q #:size (pt 0 default-line-height)
|
|
|
#:inner 'sw
|
|
|
#:out 'sw
|
|
|
#:printable #true
|
|
|
#:draw-start (if draw-debug-line? draw-debug void)))
|
|
|
|
|
|
(struct line-spacer quad () #:transparent)
|
|
|
(define q:line-spacer (q #:type line-spacer
|
|
|
#:size (pt 0 (* default-line-height 0.6))
|
|
|
#:out 'sw
|
|
|
#:printable (λ (q sig) (not (memq sig '(start end))))
|
|
|
#:draw-start (if (draw-debug-line?) draw-debug void)))
|
|
|
|
|
|
(define q:line-spacer-unbreakable
|
|
|
(struct-copy line-spacer q:line-spacer
|
|
|
[attrs #:parent quad
|
|
|
(make-hasheq '((keep-lines . #true)))]))
|
|
|
|
|
|
(define softies (map string '(#\space #\- #\u00AD)))
|
|
|
|
|
|
(define (soft-break-for-line? q)
|
|
|
(and (pair? (quad-elems q))
|
|
|
(member (unsafe-car (quad-elems q)) softies)))
|
|
|
|
|
|
(define (consolidate-runs pcs ending-q)
|
|
|
(let loop ([runs empty][pcs pcs])
|
|
|
(match pcs
|
|
|
[(? empty?) (reverse runs)]
|
|
|
[(cons (? string-quad? strq) rest)
|
|
|
(define-values (run-pcs rest) (splitf-at pcs (λ (p) (same-run? strq p))))
|
|
|
(define new-run (struct-copy quad q:string
|
|
|
[attrs (quad-attrs strq)]
|
|
|
[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 strq))))]))
|
|
|
(loop (cons new-run runs) rest)]
|
|
|
[(cons first rest) (loop (cons first runs) rest)])))
|
|
|
|
|
|
(define (render-hyphen qs ending-q)
|
|
|
;; naive handling of soft hyphen:
|
|
|
;; if soft hyphen cause the break, then append a printing hyphen to the end of the run.
|
|
|
;; this assumes that there is room for the hyphen on the line
|
|
|
;; and does not take into account hyphen-break transformations found in other languages.
|
|
|
;; However we do want the hyphen joined into the string so the final shaping / positioning is correct
|
|
|
;; for instance, kerning between last letter and hyphen.
|
|
|
(match (and ending-q (equal? (quad-elems ending-q) '("\u00AD")) qs)
|
|
|
[(list head ... last-q)
|
|
|
(define str+hyphen (string-append (car (quad-elems last-q)) "-"))
|
|
|
(append head
|
|
|
(list (struct-copy quad last-q
|
|
|
[elems (list str+hyphen)]
|
|
|
[size (make-size-promise last-q str+hyphen)])))]
|
|
|
[_ qs]))
|
|
|
|
|
|
(define-quad line-break quad ())
|
|
|
(define lbr (make-line-break #:printable #f))
|
|
|
;; treat paragraph break as special kind of line break
|
|
|
(define-quad para-break line-break ())
|
|
|
(define pbr (make-para-break #:printable #f))
|
|
|
(define-quad hr-break line-break ())
|
|
|
(define hrbr (make-hr-break #:printable #t))
|
|
|
|
|
|
(module+ test
|
|
|
(check-true (line-break? (second (quad-elems (q "foo" pbr "bar")))))
|
|
|
(check-true (line-break? (second (atomize (q "foo" pbr "bar"))))))
|
|
|
|
|
|
(define (copy-block-attrs source-hash dest-hash)
|
|
|
(for* ([k (in-list block-attrs)]
|
|
|
[v (in-value (hash-ref source-hash k #f))]
|
|
|
#:when v)
|
|
|
(hash-set! dest-hash k v))
|
|
|
dest-hash)
|
|
|
|
|
|
(define (handle-hyphenate qs)
|
|
|
;; find quads that want hyphenation and split them into smaller pieces
|
|
|
;; do this before ->string-quad so that it can handle the sizing promises
|
|
|
(apply append
|
|
|
(for/list ([q (in-list qs)])
|
|
|
(match (quad-ref q 'hyphenate)
|
|
|
[(or #false "false") (list q)]
|
|
|
[_ (for*/list ([str (in-list (quad-elems q))]
|
|
|
[hyphen-char (in-value #\u00AD)]
|
|
|
[hstr (in-value (hyphenate str hyphen-char
|
|
|
#:min-left-length 4
|
|
|
#:min-right-length 3))]
|
|
|
[substr (in-list (regexp-match* (regexp (string hyphen-char)) hstr #:gap-select? #t))])
|
|
|
(struct-copy quad q [elems (list substr)]))]))))
|
|
|
|
|
|
(define-quad filler quad ())
|
|
|
(define (fill-wrap qs ending-q line-q)
|
|
|
(match (and (pair? qs) (quad-ref (car qs) (if ending-q
|
|
|
'line-align
|
|
|
'line-align-last) "left"))
|
|
|
[(or #false "left") qs] ; default is left aligned, no filling needed
|
|
|
[align-value
|
|
|
(define word-sublists (filter-split qs (λ (q) (match (quad-elems q)
|
|
|
[(cons " " _) #true]
|
|
|
[_ #false]))))
|
|
|
(match (length word-sublists)
|
|
|
[1 #:when (equal? align-value "justify") qs] ; can't justify single word
|
|
|
[word-count
|
|
|
(match-define (list line-width line-height) (quad-size line-q))
|
|
|
;; words may still be in hyphenated fragments
|
|
|
;; (though soft hyphens would have been removed)
|
|
|
;; so group them (but no need to consolidate — that happens elsewhere)
|
|
|
(define occupied-width
|
|
|
(match align-value
|
|
|
;; for justified line, we care about size of words without spaces
|
|
|
["justify" (for*/sum ([word-sublist (in-list word-sublists)]
|
|
|
[word (in-list word-sublist)])
|
|
|
(pt-x (size word)))]
|
|
|
;; for others, we care about size with spaces
|
|
|
[_ (for/sum ([q (in-list qs)])
|
|
|
(pt-x (size q)))]))
|
|
|
(define empty-hspace (- line-width
|
|
|
(quad-ref (car qs) 'inset-left 0)
|
|
|
occupied-width
|
|
|
(quad-ref (car qs) 'inset-right 0)))
|
|
|
(match align-value
|
|
|
["justify"
|
|
|
(define space-width (/ empty-hspace (sub1 word-count)))
|
|
|
(apply append (add-between word-sublists (list (make-quad #:size (pt space-width line-height)))))]
|
|
|
[_
|
|
|
(define space-multiplier (match align-value
|
|
|
["center" 0.5]
|
|
|
["right" 1]))
|
|
|
(cons (make-quad #:type filler
|
|
|
#:size (pt (* empty-hspace space-multiplier) line-height)
|
|
|
#:attrs (quad-attrs (car qs))) qs)])])]))
|
|
|
|
|
|
(define-quad offsetter quad ())
|
|
|
|
|
|
(define (hr-draw dq doc)
|
|
|
(match-define (list left top) (quad-origin dq))
|
|
|
(match-define (list right bottom) (size dq))
|
|
|
(save doc)
|
|
|
(translate doc left (+ top (/ bottom 2)))
|
|
|
(move-to doc 0 0)
|
|
|
(line-to doc right 0)
|
|
|
(line-width doc 0.5)
|
|
|
(stroke doc "black")
|
|
|
(restore doc))
|
|
|
|
|
|
(define (make-hr-quad line-q)
|
|
|
(struct-copy quad line-q [draw-start hr-draw]))
|
|
|
|
|
|
(define ((finish-line-wrap line-q) pcs-in opening-q ending-q idx)
|
|
|
;; we curry line-q so that the wrap size can be communicated to this operation
|
|
|
;; remove unused soft hyphens so they don't affect final shaping
|
|
|
(define pcs-printing (for/list ([pc (in-list pcs-in)]
|
|
|
#:unless (equal? (quad-elems pc) '("\u00AD")))
|
|
|
pc))
|
|
|
(append
|
|
|
(cond
|
|
|
[(empty? pcs-printing) null]
|
|
|
[(hr-break? ending-q) (list (make-hr-quad line-q))]
|
|
|
[else
|
|
|
;; render hyphen first so that all printable characters are available for size-dependent ops.
|
|
|
(define pcs-with-hyphen (render-hyphen pcs-printing ending-q))
|
|
|
;; fill wrap so that consolidate-runs works properly
|
|
|
;; (justified lines won't be totally consolidated)
|
|
|
(define pcs (fill-wrap pcs-with-hyphen ending-q line-q))
|
|
|
(match (consolidate-runs pcs ending-q)
|
|
|
[(? pair? elems)
|
|
|
(define elem (unsafe-car elems))
|
|
|
(match-define (list line-width line-height) (quad-size line-q))
|
|
|
(define new-size (let ()
|
|
|
(define line-heights
|
|
|
(filter-map (λ (q) (quad-ref q 'line-height)) pcs))
|
|
|
(pt line-width (if (empty? line-heights) line-height (apply max line-heights)))))
|
|
|
(list
|
|
|
(struct-copy
|
|
|
quad line-q
|
|
|
;; move block attrs up, so they are visible in page wrap
|
|
|
[attrs (copy-block-attrs (quad-attrs elem)
|
|
|
(hash-copy (quad-attrs line-q)))]
|
|
|
;; line width is static
|
|
|
;; line height is the max 'line-height value or the natural height of q:line
|
|
|
[size new-size]
|
|
|
;; handle list indexes. drop new quad into line to hold list index
|
|
|
;; could also use this for line numbers
|
|
|
[elems
|
|
|
;; we assume here that a list item has already had extra inset-left
|
|
|
;; with room for a bullet
|
|
|
;; which we just insert at the front.
|
|
|
;; this is safe because line has already been filled.
|
|
|
(append
|
|
|
;; only put bullet into line if we're at the first line of the list item
|
|
|
(match (and (eq? idx 1) (quad-ref elem 'list-index))
|
|
|
[#false null]
|
|
|
[bullet
|
|
|
(list (struct-copy
|
|
|
quad q:string ;; copy q:string to get draw routine
|
|
|
;; borrow attrs from elem
|
|
|
[attrs (quad-attrs elem)]
|
|
|
;; use bullet as elems
|
|
|
[elems (list (if (number? bullet) (format "~a." bullet) bullet))]
|
|
|
;; no size because it's inside inset
|
|
|
[size (pt 0 0)]))])
|
|
|
(list (make-quad
|
|
|
#:type offsetter
|
|
|
#:offset (pt (quad-ref elem 'inset-left 0) 0)
|
|
|
#:elems elems)))]))]
|
|
|
[_ null])])
|
|
|
(cond
|
|
|
[ending-q null]
|
|
|
[else (list q:line-spacer)])))
|
|
|
|
|
|
(define (line-wrap qs wrap-size)
|
|
|
(define line-q (struct-copy
|
|
|
quad q:line
|
|
|
[size (pt wrap-size (pt-y (size q:line)))]))
|
|
|
(apply append
|
|
|
;; next line removes all para-break? quads as a consequence
|
|
|
(for/list ([qs (in-list (filter-split qs para-break?))])
|
|
|
(wrap qs
|
|
|
(λ (q idx) (- wrap-size (quad-ref q 'inset-left 0) (quad-ref q 'inset-right 0)))
|
|
|
#:nicely (match (and (pair? qs) (quad-ref (car qs) 'line-wrap))
|
|
|
[(or "best" "kp") #true]
|
|
|
[_ #false])
|
|
|
#:hard-break line-break?
|
|
|
#:soft-break soft-break-for-line?
|
|
|
#:finish-wrap (finish-line-wrap line-q)))))
|
|
|
|
|
|
(define (make-nobreak! q) (quad-set! q 'no-pbr "true"))
|
|
|
|
|
|
(define (do-keep-with-next! reversed-lines)
|
|
|
;; paints nobreak onto spacers that follow keep-with-next lines
|
|
|
;; (we are iterating backward, so the geometrically previous ln follows the spacer)
|
|
|
(for ([this-ln (in-list reversed-lines)]
|
|
|
[prev-ln (in-list (cdr reversed-lines))]
|
|
|
#:when (and (line-spacer? this-ln)
|
|
|
(quad-ref prev-ln 'keep-with-next)))
|
|
|
(make-nobreak! prev-ln)
|
|
|
(make-nobreak! this-ln)))
|
|
|
|
|
|
(define (apply-keeps lines)
|
|
|
(define groups-of-lines (contiguous-group-by (λ (x) (quad-ref x 'display)) lines))
|
|
|
(for*/fold ([reversed-lines null]
|
|
|
#:result (begin
|
|
|
(do-keep-with-next! reversed-lines)
|
|
|
(reverse reversed-lines)))
|
|
|
([group (in-list groups-of-lines)]
|
|
|
[group-len (in-value (length group))]
|
|
|
[(ln idx0) (in-indexed group)])
|
|
|
(define idx (add1 idx0))
|
|
|
;; always catch last line of block in this case
|
|
|
;; so later cases are guaranteed to have earlier lines.
|
|
|
(unless (eq? idx group-len)
|
|
|
(cond
|
|
|
;; if we have 'keep-all we can skip 'keep-first and 'keep-last cases
|
|
|
[(quad-ref ln 'keep-all) (make-nobreak! ln)]
|
|
|
;; to keep n lines, we only paint the first n - 1
|
|
|
;; (because each nobr line sticks to the next)
|
|
|
[(let ([keep-first (quad-ref ln 'keep-first)])
|
|
|
(and (number? keep-first) (< idx keep-first)))
|
|
|
(make-nobreak! ln)]
|
|
|
[(let ([keep-last (quad-ref ln 'keep-last)])
|
|
|
(and (number? keep-last) (< (- group-len keep-last) idx)))
|
|
|
(make-nobreak! ln)]))
|
|
|
(cons ln reversed-lines)))
|
|
|
|
|
|
(define zoom-mode? #f)
|
|
|
(define zoom-scale 2)
|
|
|
(define top-margin (/ 60 (if zoom-mode? zoom-scale 1)))
|
|
|
(define bottom-margin (/ 120 (if zoom-mode? zoom-scale 1)))
|
|
|
(define side-margin (/ 120 (if zoom-mode? zoom-scale 1)))
|
|
|
(define page-offset (pt (/ side-margin (if zoom-mode? 3 1))
|
|
|
(/ top-margin (if zoom-mode? 3 1))))
|
|
|
|
|
|
(define (page-draw-start q doc)
|
|
|
(add-page doc)
|
|
|
(scale doc (if zoom-mode? zoom-scale 1) (if zoom-mode? zoom-scale 1)))
|
|
|
|
|
|
(define (page-draw-end q doc)
|
|
|
(font-size doc 10)
|
|
|
(font doc default-font-face)
|
|
|
(fill-color doc "black")
|
|
|
(text doc (format "~a · ~a at ~a" (hash-ref (quad-attrs q) 'page-number)
|
|
|
(hash-ref (quad-attrs q) 'doc-title)
|
|
|
(date->string (current-date) #t))
|
|
|
side-margin
|
|
|
(+ (- (pdf-height doc) bottom-margin) 20)))
|
|
|
|
|
|
(define q:page (q #:offset page-offset
|
|
|
#:draw-start page-draw-start
|
|
|
#:draw-end page-draw-end))
|
|
|
|
|
|
(define q:doc (q #:draw-start (λ (q doc) (start-doc doc))
|
|
|
#:draw-end (λ (q doc) (end-doc doc))))
|
|
|
|
|
|
(define ((block-draw-start first-line) q doc)
|
|
|
;; adjust drawing coordinates for border inset
|
|
|
(match-define (list bil bit bir bib)
|
|
|
(for/list ([k (in-list '(border-inset-left border-inset-top border-inset-right border-inset-bottom))])
|
|
|
(quad-ref first-line k 0)))
|
|
|
(match-define (list left top) (pt+ (quad-origin q) (list bil bit)))
|
|
|
(match-define (list width height) (pt- (size q) (list (+ bil bir) (+ bit bib))))
|
|
|
;; fill rect
|
|
|
(cond
|
|
|
[(quad-ref first-line 'background-color)
|
|
|
=> (λ (bgcolor)
|
|
|
(rect doc left top width height)
|
|
|
(fill doc bgcolor))])
|
|
|
;; draw border
|
|
|
(match-define (list bw-left bw-top bw-right bw-bottom)
|
|
|
(map (λ (k) (max 0 (quad-ref first-line k 0))) '(border-width-left
|
|
|
border-width-top
|
|
|
border-width-right
|
|
|
border-width-bottom)))
|
|
|
;; adjust start and end points based on adjacent border width
|
|
|
;; so all borders overlap rectangularly
|
|
|
(define (half x) (/ x 2.0))
|
|
|
(define right (+ left width))
|
|
|
(define bottom (+ top height))
|
|
|
(define (box-side x1 y1 x2 y2 color stroke-width)
|
|
|
(when (positive? stroke-width)
|
|
|
(move-to doc x1 y1)
|
|
|
(line-to doc x2 y2)
|
|
|
(stroke doc (or color "black") stroke-width)))
|
|
|
(box-side (- left (half bw-left)) top (+ right (half bw-right)) top
|
|
|
(quad-ref first-line 'border-color-top) bw-top)
|
|
|
(box-side right (- top (half bw-top)) right (+ bottom (half bw-bottom))
|
|
|
(quad-ref first-line 'border-color-right) bw-right)
|
|
|
(box-side (+ right (half bw-right)) bottom (- left (half bw-left)) bottom
|
|
|
(quad-ref first-line 'border-color-bottom) bw-bottom)
|
|
|
(box-side left (+ bottom (half bw-bottom)) left (- top (half bw-top))
|
|
|
(quad-ref first-line 'border-color-left) bw-left))
|
|
|
|
|
|
(define (block-wrap lines)
|
|
|
(define first-line (car lines))
|
|
|
(q #:in 'nw
|
|
|
#:out 'sw
|
|
|
#:offset (pt 0 (+ (quad-ref first-line 'inset-top 0)))
|
|
|
#:elems lines
|
|
|
#:size (delay (pt (pt-x (size first-line)) ;
|
|
|
(+ (for/sum ([line (in-list lines)])
|
|
|
(pt-y (size line)))
|
|
|
(quad-ref first-line 'inset-top 0)
|
|
|
(quad-ref first-line 'inset-bottom 0))))
|
|
|
#:draw-start (block-draw-start first-line)
|
|
|
#:draw-end (if (draw-debug-block?)
|
|
|
(λ (q doc) (draw-debug q doc "#6c6" "#9c9"))
|
|
|
void)))
|
|
|
|
|
|
(define (contiguous-group-by pred xs)
|
|
|
;; like `group-by`, but only groups together contiguous xs with the same pred value.
|
|
|
(let loop ([xs xs][groups null])
|
|
|
(match xs
|
|
|
[(== empty) (reverse groups)]
|
|
|
[(cons first-x other-xs)
|
|
|
(define equivalence-val (pred first-x))
|
|
|
(define-values (group-members rest) (splitf-at other-xs (λ (x) (equal? (pred x) equivalence-val))))
|
|
|
(define new-group (cons first-x group-members)) ; group-members might be empty
|
|
|
(loop rest (cons new-group groups))])))
|
|
|
|
|
|
(module+ test
|
|
|
(require rackunit)
|
|
|
(check-equal?
|
|
|
(contiguous-group-by values '(1 1 2 2 2 3 4 5 5 6 6 7 8 9))
|
|
|
'((1 1) (2 2 2) (3) (4) (5 5) (6 6) (7) (8) (9))))
|
|
|
|
|
|
(define ((page-finish-wrap path) lns q0 q idx)
|
|
|
(list (struct-copy quad q:page
|
|
|
[attrs (let ([page-number idx]
|
|
|
[h (hash-copy (quad-attrs q:page))])
|
|
|
(hash-set! h 'page-number page-number)
|
|
|
(define-values (dir name _)
|
|
|
(split-path (path-replace-extension path #"")))
|
|
|
(hash-set! h 'doc-title (string-titlecase (path->string name)))
|
|
|
h)]
|
|
|
[elems (insert-blocks lns)])))
|
|
|
|
|
|
(define (page-wrap xs vertical-height path)
|
|
|
;; on timing of `insert-blocks`:
|
|
|
;; can't do it before because it depends on where pages are broken.
|
|
|
;; could do it after, but it would require going back inside each page quad
|
|
|
;; which seems overly interdependent, because `insert-blocks` is used to determine break locations.
|
|
|
;; `page-wrap` should emit quads that are complete.
|
|
|
(wrap xs vertical-height
|
|
|
#:soft-break (λ (q) #true)
|
|
|
#:no-break (λ (q) (quad-ref q 'no-pbr))
|
|
|
#:distance (λ (q dist-so-far wrap-qs)
|
|
|
;; do trial block insertions
|
|
|
(for/sum ([x (in-list (insert-blocks wrap-qs))])
|
|
|
(pt-y (size x))))
|
|
|
#:finish-wrap (page-finish-wrap path)))
|
|
|
|
|
|
(define (insert-blocks lines)
|
|
|
(define groups-of-lines (contiguous-group-by (λ (x) (quad-ref x 'display)) lines))
|
|
|
(append* (for/list ([line-group (in-list groups-of-lines)])
|
|
|
(if (quad-ref (car line-group) 'display)
|
|
|
(list (block-wrap line-group))
|
|
|
line-group))))
|
|
|
|
|
|
(define (handle-cascading-attrs attrs)
|
|
|
(resolve-font-path attrs)
|
|
|
(resolve-font-size attrs))
|
|
|
|
|
|
(define-quad first-line-indent quad ())
|
|
|
|
|
|
(define (insert-first-line-indents qs-in)
|
|
|
;; first line indents are quads inserted at the beginning of a paragraph
|
|
|
;; (that is, just after a paragraph break)
|
|
|
;; they need to be installed before line wrap
|
|
|
;; to be compatible with first-fit and best-fit.
|
|
|
(for/fold ([qs-out null]
|
|
|
#:result (reverse qs-out))
|
|
|
([q (in-list qs-in)]
|
|
|
[next-q (in-list (cdr qs-in))])
|
|
|
(match (and (para-break? q) (quad-ref next-q 'first-line-indent 0))
|
|
|
[(or #false 0) (cons next-q qs-out)]
|
|
|
[indent-val (list* next-q (make-quad #:type first-line-indent
|
|
|
#:attrs (quad-attrs next-q)
|
|
|
#:size (pt indent-val 0)) qs-out)])))
|
|
|
|
|
|
(define (render-pdf xs pdf-path)
|
|
|
(define pdf (make-pdf #:compress #t
|
|
|
#:auto-first-page #f
|
|
|
#:output-path pdf-path
|
|
|
#:width (if zoom-mode? 350 612)
|
|
|
#:height (if zoom-mode? 400 792)))
|
|
|
(define line-width (- (pdf-width pdf) (* 2 side-margin)))
|
|
|
(define vertical-height (- (pdf-height pdf) top-margin bottom-margin))
|
|
|
(parameterize ([current-pdf pdf]
|
|
|
[verbose-quad-printing? #false])
|
|
|
(setup-font-path-table! pdf-path)
|
|
|
(let* ([x (qexpr->quad `(q ((font-family ,default-font-family)
|
|
|
(font-size ,(number->string default-font-size))) ,xs))]
|
|
|
[x (atomize x #:attrs-proc handle-cascading-attrs)]
|
|
|
[x (time-name hyphenate (handle-hyphenate x))]
|
|
|
[x (map ->string-quad x)]
|
|
|
[x (insert-first-line-indents x)]
|
|
|
[x (time-name line-wrap (line-wrap x line-width))]
|
|
|
[x (apply-keeps x)]
|
|
|
[x (time-name page-wrap (page-wrap x vertical-height pdf-path))]
|
|
|
[x (time-name position (position (struct-copy quad q:doc [elems x])))])
|
|
|
(time-name draw (draw x pdf))
|
|
|
(displayln (format "wrote PDF to ~a" pdf-path)))))
|