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@ -80,91 +80,125 @@
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(define (nonprinting-at-start? x) (if (quad? x) (not (printable? x 'start)) #t))
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(define (nonprinting-at-end? x) (if (quad? x) (not (printable? x 'end)) #t))
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(define (break-softs xs
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(define (break-softs qs
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target-size
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debug
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break-val
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soft-break?
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finish-wrap-proc)
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(define start-signal (gensym))
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(let loop ([wraps null][wrap-pieces null][dist-so-far start-signal][xs xs])
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(match xs
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;; qs = list of quads
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;; current-dist = integer
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;; current-wrap = list of quads ending in previous `soft-break?`
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;; current-partial = list of unbreakable quads
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;; wraps = list of (list of quads)
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(let loop ([wraps null][current-wrap null][current-partial null][current-dist start-signal][qs qs])
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(match qs
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[(== empty)
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(when debug (report x 'end-of-the-line))
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(when debug (report 'all-quads-wrapped))
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;; combine the segments into a flat list, and drop any trailing breaks
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;; (on the idea that breaks should separate things, and there's nothing left to separate)
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;; wraps alternate with breaks
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(for/list ([pcs (in-list (cons wrap-pieces wraps))])
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(match pcs
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[(list (? nonprinting-at-end?)) pcs] ; matches break signals
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;; pieces will have been accumulated in reverse order
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;; thus beginning of list represents the end of the wrap
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[(list (? (conjoin soft-break? nonprinting-at-end?)) ... rest ...)
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(finish-wrap-proc (reverse rest))]))]
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[(cons x _)
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(when debug (report x 'one-x))
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(define at-start? (eq? dist-so-far start-signal))
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(define underflow?
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(and (not at-start?)
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(<= (+ dist-so-far (if (and (quad? x) (printable? x 'end))
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(distance x)
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0)) target-size)))
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(define (values-for-insert-break [before? #f])
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;; a break can be inserted before or after the current quad.
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;; At an ordinary break (hard or soft) it goes after the wrap point.
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;; The wrap signal consumes the break if it's nonprinting (e.g., word space or hard break)
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;; but not if it's printing (e.g., hyphen).
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;; But if no ordinary break can be found for a line, the wrap will happen before the quad.
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;; The wrap signal will not consume the quad (rather, it will become the first quad in the next wrap)
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;; (we do this by resetting next-xs to the whole xs list)
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;; In both cases, the `finish-wrap` proc will strip off any trailing white breaks from the new segment.
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(if before?
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(values wrap-pieces xs)
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; omit nonprinting quad
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(values (if (and (quad? x) (nonprinting-at-end? x))
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wrap-pieces
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(cons x wrap-pieces)) (cdr xs))))
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(for/list ([wrap (in-list (cons (append current-partial current-wrap) wraps))])
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(match wrap
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[(list (? nonprinting-at-end?)) wrap] ; matches break signals
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;; pieces will have been accumulated in reverse order
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;; thus beginning of list represents the end of the wrap
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[(list (? (conjoin soft-break? nonprinting-at-end?)) ... rest ...) (finish-wrap-proc (reverse rest))]))]
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[(cons q other-qs)
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(when debug (report q 'next-q))
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(define at-start? (eq? current-dist start-signal))
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#;(define underflow?
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(and (not at-start?)
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(<= (+ current-dist (if (and (quad? q) (printable? q 'end))
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(distance q)
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0)) target-size)))
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#;(define (values-for-insert-break [before? #f])
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;; a break can be inserted before or after the current quad.
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;; At an ordinary break (hard or soft) it goes after the wrap point.
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;; The wrap signal consumes the break if it's nonprinting (e.g., word space or hard break)
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;; but not if it's printing (e.g., hyphen).
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;; But if no ordinary break can be found for a line, the wrap will happen before the quad.
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;; The wrap signal will not consume the quad (rather, it will become the first quad in the next wrap)
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;; (we do this by resetting next-xs to the whole xs list)
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;; In both cases, the `finish-wrap` proc will strip off any trailing white breaks from the new segment.
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(if before?
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(values current-wrap qs)
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; omit nonprinting quad
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(values (if (and (quad? q) (nonprinting-at-end? q))
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current-wrap
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(cons q current-wrap)) (cdr qs))))
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(define dist (and (quad? q) (printable? q (and at-start? 'start)) (distance q)))
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#R dist
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(cond
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[(and at-start? (soft-break? x) (nonprinting-at-start? x))
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(when debug (report x 'skipping-soft-break-at-beginning))
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[at-start? ; assume printing char
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(when debug (report 'at-start))
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(loop wraps current-wrap (cons q current-partial) dist (cdr qs))]
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[else
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(define would-overflow? (> (+ dist current-dist) target-size))
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(cond
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[would-overflow?
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(when debug (report 'would-overflow))
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;; finish the wrap & reset the line without consuming a q
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(loop (list* (list break-val) (append current-partial current-wrap) wraps)
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null
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null
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start-signal
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qs)]
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[else
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(when debug (report 'would-not-overflow))
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;; add to partial
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(loop wraps
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current-wrap
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(cons q current-partial)
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(+ dist current-dist)
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other-qs)])
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])
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#;[(and at-start? (soft-break? q) (nonprinting-at-start? q))
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(when debug (report q 'skipping-soft-break-at-beginning))
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;; skip it
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(loop wraps null dist-so-far (cdr xs))]
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[(and underflow? (soft-break? x))
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(when debug (report x 'underflow-soft-break))
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(define-values (pieces-for-this-wrap next-xs) (values-for-insert-break))
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(loop wraps null null current-dist (cdr qs))]
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#;[(and underflow? (soft-break? q))
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(when debug (report q 'underflow-soft-break))
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(loop (list* (list break-val) pieces-for-this-wrap wraps)
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null
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current-hard
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start-signal
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next-xs)]
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;; the easy case of accumulating quads in the middle of a wrap
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[(or (and underflow? (when debug (report x 'add-underflow)) #t)
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;; the easy case of accumulating quads in the middle of a wrap
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#;[(or (and underflow? (when debug (report q 'add-underflow)) #t)
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;; assume printing (nonprinting were handled in first case)
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;; this branch reached if the first quad on the line causes an overflow
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;; That sounds weird, but maybe it's just really big.
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(and at-start? (when debug (report x 'add-at-start)) #t)
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(and at-start? (when debug (report q 'add-at-start)) #t)
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;; we do want to accumulate nonprinting soft breaks (like wordspaces and soft hyphens) in the middle.
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;; in case we eventually encounter a printing quad that fits on the line.
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;; if we don't (ie. the line overflows) then they will get stripped by `finish-wrap`
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(and (soft-break? x) (nonprinting-at-end? x) (when debug (report x 'add-nonprinting-soft-break)) #t))
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(define printable (and (quad? x) (printable? x (and at-start? 'start))))
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(define dist (and printable (distance x)))
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(and (soft-break? q) (nonprinting-at-end? q) (when debug (report q 'add-nonprinting-soft-break)) #t))
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(define printable (and (quad? q) (printable? q (and at-start? 'start))))
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(define dist (and printable (distance q)))
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(loop wraps
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(if (and (quad? x) (not printable)) wrap-pieces (cons x wrap-pieces)) ; omit nonprinting quad
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(if at-start? (or dist start-signal) (+ dist-so-far (or dist 0)))
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(cdr xs))]
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;; the previous branch will catch all `underflow?` cases
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;; therefore, in these last two cases, we have overflow
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(if (and (quad? q) (not printable)) current-wrap (cons q current-wrap)) ; omit nonprinting quad
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current-partial
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(if at-start? (or dist start-signal) (+ current-dist (or dist 0)))
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(cdr qs))]
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;; the previous branch will catch all `underflow?` cases
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;; therefore, in these last two cases, we have overflow
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[else ;; overflow implied
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#;[else ;; overflow implied
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;; if we don't have an soft break stored, we need to just end the wrap and move on
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;; we insert the break `before` so that the current quad is moved to the next wrap
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;; no, it's not going to look good, but if we reach this point, we are in weird conditions
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(when debug (report x 'falling-back))
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(when debug (report q 'falling-back))
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(define-values (pieces-for-this-wrap next-xs) (values-for-insert-break 'before))
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(loop (list* (list break-val) pieces-for-this-wrap wraps)
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null
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current-partial
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start-signal
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next-xs)])])))
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next-xs)]
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])))
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(define x (q (list 'size (pt 1 1)) #\x))
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@ -191,132 +225,129 @@
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#:hard-break-proc (λ (q) (and (quad? q) (memv (car (elems q)) '(#\newline))))
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#:soft-break-proc soft-break?))
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(module+ test
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(check-equal? (linewrap (list a sp b) 3 #true) (list a sp b)))
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(module+ test
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(require rackunit))
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(require rackunit)
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(module+ test
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(test-case
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"chars"
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(check-equal? (linewrap (list) 1) null)
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(check-equal? (linewrap (list x) 1) (list x))
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(check-equal? (linewrap (list x x) 1) (list x 'lb x))
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(check-equal? (linewrap (list x x x) 1) (list x 'lb x 'lb x))
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(check-equal? (linewrap (list x x x) 2) (list x x 'lb x))
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(check-equal? (linewrap (list x x x x) 2) (list x x 'lb x x))
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(check-equal? (linewrap (list x x x x x) 3) (list x x x 'lb x x))
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(check-equal? (linewrap (list x x x x x) 1) (list x 'lb x 'lb x 'lb x 'lb x))
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(check-equal? (linewrap (list x x x x x) 10) (list x x x x x))))
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(test-case
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"chars"
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(check-equal? (linewrap (list) 1) null)
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(check-equal? (linewrap (list a) 1) (list a))
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(check-equal? (linewrap (list a b) 1) (list a 'lb b))
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(check-equal? (linewrap (list a b c) 1) (list a 'lb b 'lb c))
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(check-equal? (linewrap (list a b c) 2) (list a b 'lb c))
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(check-equal? (linewrap (list x x x x) 2) (list x x 'lb x x))
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(check-equal? (linewrap (list x x x x x) 3) (list x x x 'lb x x))
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(check-equal? (linewrap (list x x x x x) 1) (list x 'lb x 'lb x 'lb x 'lb x))
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(check-equal? (linewrap (list x x x x x) 10) (list x x x x x))))
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#;(module+ test
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(test-case
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"chars and spaces"
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(check-equal? (linewrap (list x sp x) 1) (list x 'lb x))
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(check-equal? (linewrap (list x x sp x) 2) (list x x 'lb x))
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(check-equal? (linewrap (list a sp b) 3) (list a sp b))
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(check-equal? (linewrap (list x sp x x) 3) (list x 'lb x x))))
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(test-case
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"chars and spaces"
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(check-equal? (linewrap (list x sp x) 1) (list x 'lb x))
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(check-equal? (linewrap (list x x sp x) 2) (list x x 'lb x))
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(check-equal? (linewrap (list a sp b) 3) (list a sp b))
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(check-equal? (linewrap (list a sp b c) 3) (list a 'lb b c))))
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(module+ test
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(test-case
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"leading & trailing spaces"
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(check-equal? (linewrap (list sp x) 2) (list x))
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(check-equal? (linewrap (list x sp) 2) (list x))
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(check-equal? (linewrap (list sp x sp) 2) (list x))
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(check-equal? (linewrap (list sp sp x sp sp) 2) (list x))
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(check-equal? (linewrap (list sp sp x sp sp x sp) 1) (list x 'lb x))))
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#;(module+ test
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(test-case
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"leading & trailing spaces"
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(check-equal? (linewrap (list sp x) 2) (list x))
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(check-equal? (linewrap (list x sp) 2) (list x))
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(check-equal? (linewrap (list sp x sp) 2) (list x))
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(check-equal? (linewrap (list sp sp x sp sp) 2) (list x))
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(check-equal? (linewrap (list sp sp x sp sp x sp) 1) (list x 'lb x))))
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#;(module+ test
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(test-case
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"hard hyphens"
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(check-equal? (linewrap (list hyph) 1) (list hyph))
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(check-equal? (linewrap (list hyph hyph) 1) (list hyph 'lb hyph))
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(check-equal? (linewrap (list hyph hyph) 2) (list hyph hyph))
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(check-equal? (linewrap (list hyph hyph hyph) 2) (list hyph hyph 'lb hyph))
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(check-equal? (linewrap (list x hyph) 1) (list x 'lb hyph))
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(check-equal? (linewrap (list x x hyph x x) 1) (list x 'lb x 'lb hyph 'lb x 'lb x))
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(check-equal? (linewrap (list x x hyph x x) 2) (list x x 'lb hyph x 'lb x))
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(check-equal? (linewrap (list x x hyph x x) 3) (list x x hyph 'lb x x))
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(check-equal? (linewrap (list x x hyph x x) 4) (list x x hyph 'lb x x))
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(check-equal? (linewrap (list x x hyph x x) 5) (list x x hyph x x))))
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(test-case
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"hard hyphens"
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(check-equal? (linewrap (list hyph) 1) (list hyph))
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(check-equal? (linewrap (list hyph hyph) 1) (list hyph 'lb hyph))
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(check-equal? (linewrap (list hyph hyph) 2) (list hyph hyph))
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(check-equal? (linewrap (list hyph hyph hyph) 2) (list hyph hyph 'lb hyph))
|
|
|
|
|
(check-equal? (linewrap (list x hyph) 1) (list x 'lb hyph))
|
|
|
|
|
(check-equal? (linewrap (list x x hyph x x) 1) (list x 'lb x 'lb hyph 'lb x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x hyph x x) 2) (list x x 'lb hyph x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x hyph x x) 3) (list x x hyph 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x hyph x x) 4) (list x x hyph 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x hyph x x) 5) (list x x hyph x x))))
|
|
|
|
|
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|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"soft hyphens"
|
|
|
|
|
(check-equal? (linewrap (list shy) 1) (list))
|
|
|
|
|
(check-equal? (linewrap (list shy shy) 2) (list))
|
|
|
|
|
(check-equal? (linewrap (list shy shy shy) 2) (list))
|
|
|
|
|
(check-equal? (linewrap (list x shy) 1) (list x))
|
|
|
|
|
(check-equal? (linewrap (list x shy shy shy shy) 1) (list x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 1) (list x 'lb x 'lb x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 2) (list x x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 3) (list x x shy 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 4) (list x x x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 5) (list x x x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x sp x) 4) (list x x x 'lb x))))
|
|
|
|
|
(test-case
|
|
|
|
|
"soft hyphens"
|
|
|
|
|
(check-equal? (linewrap (list shy) 1) (list))
|
|
|
|
|
(check-equal? (linewrap (list shy shy) 2) (list))
|
|
|
|
|
(check-equal? (linewrap (list shy shy shy) 2) (list))
|
|
|
|
|
(check-equal? (linewrap (list x shy) 1) (list x))
|
|
|
|
|
(check-equal? (linewrap (list x shy shy shy shy) 1) (list x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 1) (list x 'lb x 'lb x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 2) (list x x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 3) (list x x shy 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 4) (list x x x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x x) 5) (list x x x x))
|
|
|
|
|
(check-equal? (linewrap (list x x shy x sp x) 4) (list x x x 'lb x))))
|
|
|
|
|
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"zero width nonbreakers"
|
|
|
|
|
(check-equal? (linewrap (list sp zwx) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list zwx sp) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list sp zwx sp) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list sp sp zwx sp sp) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list sp sp zwx sp sp zwx sp) 2) (list zwx sp sp zwx))))
|
|
|
|
|
(test-case
|
|
|
|
|
"zero width nonbreakers"
|
|
|
|
|
(check-equal? (linewrap (list sp zwx) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list zwx sp) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list sp zwx sp) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list sp sp zwx sp sp) 2) (list zwx))
|
|
|
|
|
(check-equal? (linewrap (list sp sp zwx sp sp zwx sp) 2) (list zwx sp sp zwx))))
|
|
|
|
|
|
|
|
|
|
(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"hard breaks"
|
|
|
|
|
(check-equal? (linewrap (list br) 2) (list)) ;; only insert a break if it's between things
|
|
|
|
|
(check-equal? (linewrap (list a br b) 2) (list a 'lb b))
|
|
|
|
|
(check-equal? (linewrap (list a b br) 2) (list a b))
|
|
|
|
|
(check-equal? (linewrap (list a b br br) 2) (list a b))
|
|
|
|
|
(check-equal? (linewrap (list x br x x) 3) (list x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x br x) 3) (list x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x x x) 3) (list x x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 2) (list x x 'lb x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 3) (list x x x 'lb x x))))
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"hard breaks"
|
|
|
|
|
(check-equal? (linewrap (list br) 2) (list)) ;; only insert a break if it's between things
|
|
|
|
|
(check-equal? (linewrap (list a br b) 2) (list a 'lb b))
|
|
|
|
|
(check-equal? (linewrap (list a b br) 2) (list a b))
|
|
|
|
|
(check-equal? (linewrap (list a b br br) 2) (list a b))
|
|
|
|
|
(check-equal? (linewrap (list x br x x) 3) (list x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x br x) 3) (list x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x x x) 3) (list x x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 2) (list x x 'lb x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 3) (list x x x 'lb x x))))
|
|
|
|
|
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"hard breaks and spurious spaces"
|
|
|
|
|
(check-equal? (linewrap (list a sp sp sp br b) 2) (list a 'lb b))
|
|
|
|
|
(check-equal? (linewrap (list x sp br sp sp x x sp) 3) (list x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list sp sp x x sp sp br sp sp sp x) 3) (list x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list a sp b sp sp br sp c) 3) (list a sp b 'lb c))
|
|
|
|
|
(check-equal? (linewrap (list x x x x) 3) (list x x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 2) (list x x 'lb x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 3) (list x x x 'lb x x))))
|
|
|
|
|
(test-case
|
|
|
|
|
"hard breaks and spurious spaces"
|
|
|
|
|
(check-equal? (linewrap (list a sp sp sp br b) 2) (list a 'lb b))
|
|
|
|
|
(check-equal? (linewrap (list x sp br sp sp x x sp) 3) (list x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list sp sp x x sp sp br sp sp sp x) 3) (list x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list a sp b sp sp br sp c) 3) (list a sp b 'lb c))
|
|
|
|
|
(check-equal? (linewrap (list x x x x) 3) (list x x x 'lb x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 2) (list x x 'lb x 'lb x x))
|
|
|
|
|
(check-equal? (linewrap (list x x x sp x x) 3) (list x x x 'lb x x))))
|
|
|
|
|
|
|
|
|
|
(define (visual-wrap str int [debug #f])
|
|
|
|
|
(apply string (for/list ([b (in-list (linewrap (for/list ([atom (atomize str)])
|
|
|
|
|
($quad (hash-set (attrs atom) 'size '(1 1))
|
|
|
|
|
(elems atom))) int debug))])
|
|
|
|
|
(cond
|
|
|
|
|
[(quad? b) (car (elems b))]
|
|
|
|
|
[else #\|]))))
|
|
|
|
|
($quad (hash-set (attrs atom) 'size '(1 1))
|
|
|
|
|
(elems atom))) int debug))])
|
|
|
|
|
(cond
|
|
|
|
|
[(quad? b) (car (elems b))]
|
|
|
|
|
[else #\|]))))
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"visual breaks"
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 1) "M|y|d|o|g|h|a|s|f|l|e|a|s")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 2) "My|do|g|ha|s|fl|ea|s")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 3) "My|dog|has|fle|as")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 4) "My|dog|has|flea|s")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 5) "My|dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 6) "My dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 7) "My dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 8) "My dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 9) "My dog|has fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 10) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 11) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 12) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 13) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 14) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 15) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 16) "My dog has fleas")))
|
|
|
|
|
(test-case
|
|
|
|
|
"visual breaks"
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 1) "M|y|d|o|g|h|a|s|f|l|e|a|s")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 2) "My|do|g|ha|s|fl|ea|s")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 3) "My|dog|has|fle|as")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 4) "My|dog|has|flea|s")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 5) "My|dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 6) "My dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 7) "My dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 8) "My dog|has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 9) "My dog|has fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 10) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 11) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 12) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 13) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 14) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 15) "My dog has|fleas")
|
|
|
|
|
(check-equal? (visual-wrap "My dog has fleas" 16) "My dog has fleas")))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(define (pagewrap xs size [debug #f])
|
|
|
|
|
@ -327,35 +358,35 @@
|
|
|
|
|
#:soft-break-proc (λ (x) (eq? x 'lb))))
|
|
|
|
|
(define pbr (q '(size #f) #\page))
|
|
|
|
|
|
|
|
|
|
(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"soft page breaks"
|
|
|
|
|
(check-equal? (pagewrap null 2) '(pb))
|
|
|
|
|
(check-equal? (pagewrap (list x) 2) (list 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x x) 2) (list 'pb x x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 1) (list 'pb x 'pb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 2) (list 'pb x x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 3) (list 'pb x x x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 4) (list 'pb x x x))
|
|
|
|
|
(check-equal? (pagewrap (list x 'lb x x) 2) (list 'pb x 'pb x x))))
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"soft page breaks"
|
|
|
|
|
(check-equal? (pagewrap null 2) '(pb))
|
|
|
|
|
(check-equal? (pagewrap (list x) 2) (list 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x x) 2) (list 'pb x x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 1) (list 'pb x 'pb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 2) (list 'pb x x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 3) (list 'pb x x x))
|
|
|
|
|
(check-equal? (pagewrap (list x x x) 4) (list 'pb x x x))
|
|
|
|
|
(check-equal? (pagewrap (list x 'lb x x) 2) (list 'pb x 'pb x x))))
|
|
|
|
|
|
|
|
|
|
(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"hard page breaks"
|
|
|
|
|
(check-equal? (pagewrap (list x pbr x x) 2) (list 'pb x 'pb x x))
|
|
|
|
|
(check-equal? (pagewrap (list x pbr x x) 1) (list 'pb x 'pb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x pbr pbr x x) 1) (list 'pb x 'pb 'pb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x pbr pbr x x) 2) (list 'pb x 'pb 'pb x x))
|
|
|
|
|
(check-equal? (pagewrap (list 'lb x 'lb 'lb pbr 'lb x x 'lb) 2) (list 'pb x 'pb x x))))
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"hard page breaks"
|
|
|
|
|
(check-equal? (pagewrap (list x pbr x x) 2) (list 'pb x 'pb x x))
|
|
|
|
|
(check-equal? (pagewrap (list x pbr x x) 1) (list 'pb x 'pb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x pbr pbr x x) 1) (list 'pb x 'pb 'pb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (list x pbr pbr x x) 2) (list 'pb x 'pb 'pb x x))
|
|
|
|
|
(check-equal? (pagewrap (list 'lb x 'lb 'lb pbr 'lb x x 'lb) 2) (list 'pb x 'pb x x))))
|
|
|
|
|
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"composed line breaks and page breaks"
|
|
|
|
|
(check-equal? (pagewrap (linewrap null 1) 2) '(pb) )
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x) 1) 2) (list 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x x x) 1) 2) (list 'pb x 'lb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x x x) 2) 2) (list 'pb x x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x x x) 2) 1) (list 'pb x 'pb x 'pb x))))
|
|
|
|
|
(test-case
|
|
|
|
|
"composed line breaks and page breaks"
|
|
|
|
|
(check-equal? (pagewrap (linewrap null 1) 2) '(pb) )
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x) 1) 2) (list 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x x x) 1) 2) (list 'pb x 'lb x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x x x) 2) 2) (list 'pb x x 'pb x))
|
|
|
|
|
(check-equal? (pagewrap (linewrap (list x x x) 2) 1) (list 'pb x 'pb x 'pb x))))
|
|
|
|
|
|
|
|
|
|
(struct $slug $quad () #:transparent)
|
|
|
|
|
(define (slug . xs) ($slug #f xs))
|
|
|
|
|
@ -367,12 +398,12 @@
|
|
|
|
|
#:finish-wrap-proc (λ (pcs) (list ($slug #f pcs)))))
|
|
|
|
|
|
|
|
|
|
#;(module+ test
|
|
|
|
|
(test-case
|
|
|
|
|
"hard breaks and spurious spaces with slugs"
|
|
|
|
|
(check-equal? (linewrap2 (list a sp sp sp br b) 2) (list (slug a) 'lb (slug b)))
|
|
|
|
|
(check-equal? (linewrap2 (list x sp br sp sp x x sp) 3) (list (slug x) 'lb (slug x x)))
|
|
|
|
|
(check-equal? (linewrap2 (list sp sp x x sp sp br sp sp sp x) 3) (list (slug x x) 'lb (slug x)))
|
|
|
|
|
(check-equal? (linewrap2 (list a sp b sp sp br sp c) 3) (list (slug a sp b) 'lb (slug c)))
|
|
|
|
|
(check-equal? (linewrap2 (list x x x x) 3) (list (slug x x x) 'lb (slug x)))
|
|
|
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(check-equal? (linewrap2 (list x x x sp x x) 2) (list (slug x x) 'lb (slug x) 'lb (slug x x)))
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(check-equal? (linewrap2 (list x x x sp x x) 3) (list (slug x x x) 'lb (slug x x)))))
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(test-case
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"hard breaks and spurious spaces with slugs"
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(check-equal? (linewrap2 (list a sp sp sp br b) 2) (list (slug a) 'lb (slug b)))
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(check-equal? (linewrap2 (list x sp br sp sp x x sp) 3) (list (slug x) 'lb (slug x x)))
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(check-equal? (linewrap2 (list sp sp x x sp sp br sp sp sp x) 3) (list (slug x x) 'lb (slug x)))
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(check-equal? (linewrap2 (list a sp b sp sp br sp c) 3) (list (slug a sp b) 'lb (slug c)))
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(check-equal? (linewrap2 (list x x x x) 3) (list (slug x x x) 'lb (slug x)))
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(check-equal? (linewrap2 (list x x x sp x x) 2) (list (slug x x) 'lb (slug x) 'lb (slug x x)))
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(check-equal? (linewrap2 (list x x x sp x x) 3) (list (slug x x x) 'lb (slug x x)))))
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