@ -75,13 +75,19 @@
( define ( sum-sum-x qss )
( for/sum ( [ qs ( in-list qss ) ] )
( sum-x qs ) ) )
( sum-x qs ) ) )
( define ( tracking-adjustment q )
( match q
[ ( ? string-quad? ) ( / ( quad-ref q :font-tracking 0 ) 2.0 ) ]
[ _ 0 ] ) )
( define ( line-height-from-qs qs )
;; line height is the max 'line-height value or the natural height of q:line
( match ( filter-map ( λ ( q ) ( or ( quad-ref q :line-height ) ( pt-y ( size q ) ) ) ) qs )
[ ( ? null? ) #false ]
[ line-heights ( apply max line-heights ) ] ) )
( define ( fill-line-wrap all-qs line-prototype last-line-in-paragraph? )
;; happens during the finish of a line wrap, before consolidation of runs
( unless ( pair? all-qs )
@ -134,12 +140,12 @@
;; which amounts to shrinking the word spaces till the line fits
( and line-overfull? ( > nonspacess-count 1 ) ) ) )
( define justified-space-width ( / empty-hspace ( sub1 nonspacess-count ) ) )
( cons ( make-left-edge-filler )
( apply append ( add-between hung-nonspacess ( list ( make-quad
#:from ' bo
#:to ' bi
#:draw-end q:string-draw-end
#:size ( pt justified-space-width line-prototype-height ) ) ) ) ) )]
( define justified-spacer ( make-quad
#:from ' bo
#:to ' bi
#:draw-end q:string-draw-end
#:size ( pt justified-space-width ( or ( line-height-from-qs ( append* hung-nonspacess ) ) line-prototype-height ) ) ) )
( cons ( make-left-edge-filler ) ( apply append ( add-between hung-nonspacess ( list justified-spacer ) ) ) ]
[ else
( define space-multiplier ( match align-value
[ " center " 0.5 ]
@ -175,7 +181,7 @@
;; remove unused soft hyphens so they don't affect final shaping
( define wrap-qs-printing ( for/list ( [ wq ( in-list wrap-qs ) ]
#:unless ( equal? ( quad-elems wq ) ' ( " \u00AD " ) ) )
wq ) )
wq ) )
( define new-lines
( cond
[ ( empty? wrap-qs-printing ) null ]
@ -200,10 +206,7 @@
( hash-ref! h :display default-block-id )
h ) ]
;; line width is static
;; line height is the max 'line-height value or the natural height of q:line
[ size ( pt line-width ( match ( filter-map ( λ ( q ) ( or ( quad-ref q :line-height ) ( pt-y ( size q ) ) ) ) pcs )
[ ( ? null? ) line-height ]
[ line-heights ( apply max line-heights ) ] ) ) ]
[ size ( pt line-width ( or ( line-height-from-qs pcs ) line-height ) ) ]
;; handle list indexes. drop new quad into line to hold list index
;; could also use this for line numbers
[ elems
@ -283,34 +286,34 @@
( define res
( apply append
( for/list ( [ para-qs ( in-list para-qss ) ] )
( define block-id ( gensym ) )
( match para-qs
[ ( ? break-quad? bq ) ( list bq ) ]
[ ( cons pq _ )
( define line-q-for-this-paragraph
( quad-copy line-quad
q:line
[ size ( pt wrap-size ( quad-ref pq :line-height default-line-height ) ) ] ) )
( wrap para-qs
( * ( - wrap-size
( quad-ref pq :inset-left 0 )
( quad-ref pq :inset-right 0 ) )
( permitted-justify-overfill pq ) )
debug
;; during wrap, anchored qs are treated as having distance 0
;; so they can staty in right place, so that relative queries will work.
;; but they won't affect where lines break
#:distance ( λ ( q last-dist wrap-qs )
( + last-dist ( cond
[ ( quad-ref q :parent ) 0 ]
[ ( printable? q ) ( distance q ) ]
[ else 0 ] ) ) )
#:nicely ( match ( or ( current-line-wrap ) ( quad-ref pq :line-wrap ) )
[ ( or " best " " kp " ) #true ]
[ _ #false ] )
#:hard-break line-break-quad?
#:soft-break soft-break-for-line?
#:finish-wrap ( line-wrap-finish line-q-for-this-paragraph block-id ) ) ] ) ) ) )
( define block-id ( gensym ) )
( match para-qs
[ ( ? break-quad? bq ) ( list bq ) ]
[ ( cons pq _ )
( define line-q-for-this-paragraph
( quad-copy line-quad
q:line
[ size ( pt wrap-size ( quad-ref pq :line-height default-line-height ) ) ] ) )
( wrap para-qs
( * ( - wrap-size
( quad-ref pq :inset-left 0 )
( quad-ref pq :inset-right 0 ) )
( permitted-justify-overfill pq ) )
debug
;; during wrap, anchored qs are treated as having distance 0
;; so they can staty in right place, so that relative queries will work.
;; but they won't affect where lines break
#:distance ( λ ( q last-dist wrap-qs )
( + last-dist ( cond
[ ( quad-ref q :parent ) 0 ]
[ ( printable? q ) ( distance q ) ]
[ else 0 ] ) ) )
#:nicely ( match ( or ( current-line-wrap ) ( quad-ref pq :line-wrap ) )
[ ( or " best " " kp " ) #true ]
[ _ #false ] )
#:hard-break line-break-quad?
#:soft-break soft-break-for-line?
#:finish-wrap ( line-wrap-finish line-q-for-this-paragraph block-id ) ) ] ) ) ) )
res ]
[ _ null ] ) )
