(module core mzscheme
(require (lib "class.ss")
(lib "unitsig.ss")
(lib "file.ss")
(lib "etc.ss")
(lib "contract.ss")
(all-except (lib "mred.ss" "mred") send-event)
"private/fratpac.ss"
(lib "math.ss")
"sig.ss"
"util.ss")
(require (rename "private/frtime/lang-ext.ss" frp:value-now value-now))
(require (rename "private/frtime/frtime.ss" frp:max max))
(require "private/timer-factory.ss")
(require (rename "private/frtime/frp-core.ss" do-in-manager do-in-manager))
(provide core@
zero-inset)
(define/provide-struct sliderec (drawer title comment page page-count inset transitions)) (define/provide-struct just-a-comment (content)) (define/provide-struct sinset (l t r b))
(define/provide-struct click-region (left top right bottom thunk show-click?))
(define zero-inset (make-sinset 0 0 0 0))
(define core@
(unit/sig core^
(import config^ (viewer : viewer^))
(rename (local:condense? condense?)
(local:printing? printing?))
(define local:condense? condense?)
(define local:printing? printing?)
(define font-size base-font-size)
(define gap-size (* 3/4 font-size))
(define line-sep 2)
(define title-size (+ font-size 4))
(define main-font (if (and (not printing?)
(string=? (get-family-builtin-face 'default) " Sans"))
'default
'swiss))
(define current-main-font (make-parameter main-font))
(when (not (and (= use-screen-w screen-w)
(= use-screen-h screen-h)
(= pixel-scale 1)))
(current-expected-text-scale (list (* (/ use-screen-w screen-w) pixel-scale)
(* (/ use-screen-h screen-h) pixel-scale))))
(define red "red")
(define green "forest green")
(define blue "blue")
(define purple "purple")
(define orange "orange")
(define current-font-size (make-parameter
font-size
(lambda (x)
(unless (and (number? x)
(integer? x)
(exact? x)
(positive? x))
(raise-type-error 'current-font-size "exact non-negative integer" x))
x)))
(define current-title-color (make-parameter
green
(lambda (x)
(unless (or (string? x)
(x . is-a? . color%))
(raise-type-error 'current-title-color
"string or color% object"
x))
x)))
(define (t s) (text s (current-main-font) (current-font-size)))
(define (it s) (text s `(italic . ,(current-main-font)) (current-font-size)))
(define (bt s) (text s `(bold . ,(current-main-font)) (current-font-size)))
(define (bit s) (text s `(bold italic . ,(current-main-font)) (current-font-size)))
(define (tt s) (text s '(bold . modern) (current-font-size)))
(define (rt s) (text s 'roman (current-font-size)))
(define (titlet s) (colorize (text s
`(bold . ,(current-main-font))
title-size)
(current-title-color)))
(define (with-font f k)
(parameterize ([current-main-font f])
(k)))
(define (tt* . l) (apply vl-append line-sep (map tt l)))
(define bullet (baseless
(cc-superimpose (disk (/ gap-size 2))
(blank 0 gap-size)))) (define o-bullet (baseless
(cc-superimpose (circle (/ gap-size 2))
(blank 0 gap-size))))
(define margin 20)
(define-values (client-w client-h) (values (- screen-w (* margin 2))
(- screen-h (* margin 2))))
(define full-page (blank client-w client-h))
(define title-h (pict-height (titlet "Hi")))
(define (mk-titleless-page)
(inset full-page 0 (- 0 title-h (* 2 gap-size)) 0 0))
(define titleless-page (mk-titleless-page))
(define (set-margin! m)
(set! margin m)
(set! client-w (- screen-w (* 2 margin)))
(set! client-h (- screen-h (* 2 margin)))
(set! full-page (blank client-w client-h))
(set! titleless-page (mk-titleless-page)))
(define (get-margin) margin)
(define (get-client-w) client-w)
(define (get-client-h) client-h)
(define (get-full-page) full-page)
(define (get-titleless-page) titleless-page)
(define (set-title-h! h)
(set! title-h h)
(set! titleless-page (mk-titleless-page)))
(define (get-title-h) title-h)
(define (set-use-background-frame! on?)
(viewer:set-use-background-frame! (and on? #t)))
(define (enable-click-advance! on?)
(viewer:enable-click-advance! (and on? #t)))
(define (set-page-numbers-visible! on?)
(viewer:set-page-numbers-visible! (and on? #t)))
(define current-page-number-font
(make-parameter
(make-object font% 10 'default 'normal 'normal)
(lambda (f)
(unless (f . is-a? . font%)
(raise-type-error 'current-page-number-font "font%" f))
f)))
(define current-page-number-color
(make-parameter (make-object color% "black")
(lambda (s)
(unless (s . is-a? . color%)
(raise-type-error 'current-page-number-color "color%" s))
s)))
(define page-number 1)
(define current-slide-time (make-parameter #f))
(define my-current-slide-time
(case-lambda
[() (do-in-manager (current-slide-time))]
[(x) (do-in-manager (current-slide-time x))]))
(define (get-current-slide-time)
(when (not (my-current-slide-time))
(my-current-slide-time (get-new-time current-page-index (viewer:get-current-page))))
(my-current-slide-time))
(define current-mouse-x #f)
(define (get-current-mouse-x)
(when (not current-mouse-x)
(set! current-mouse-x (get-new-beh current-page-index
(viewer:get-current-page)
(viewer:get-current-mouse-x/b))))
current-mouse-x)
(define current-mouse-y #f)
(define (get-current-mouse-y)
(when (not current-mouse-y)
(set! current-mouse-y (get-new-beh current-page-index
(viewer:get-current-page)
(viewer:get-current-mouse-y/b))))
current-mouse-y)
(define current-key-events #f)
(define (get-current-key-events)
(when (not current-key-events)
(set! current-key-events (filter-events current-page-index
(viewer:get-current-page)
(viewer:get-key-events))))
current-key-events)
(define current-page-index 1)
(define (get-cpi) current-page-index)
(define (add-slide! pict title comment page-count inset)
(viewer:add-talk-slide!
(make-sliderec (make-pict-drawer pict)
title
comment
page-number
page-count
inset
null))
(set! current-page-index (add1 current-page-index))
(my-current-slide-time (get-new-time current-page-index (viewer:get-current-page)))
(set! current-mouse-x (get-new-beh current-page-index
(viewer:get-current-page)
(viewer:get-current-mouse-x/b)))
(set! current-mouse-y (get-new-beh current-page-index
(viewer:get-current-page)
(viewer:get-current-mouse-y/b)))
(set! current-key-events (filter-events current-page-index
(viewer:get-current-page)
(viewer:get-key-events)))
(set! page-number (+ page-number page-count)))
(define (skip-slides n)
(set! page-number (+ page-number n)))
(define (evenize-width p)
(let ([w (frp:value-now (pict-width p))])
(inset p 0 0 (+ (- (ceiling w) w)
(modulo (ceiling w) 2)) 0)))
(define (apply-slide-inset sinset pict)
(inset pict
(- (sinset-l sinset))
(- (sinset-t sinset))
(- (sinset-r sinset))
(- (sinset-b sinset))))
(define (do-add-slide! content title comment page-count inset)
(add-slide!
(ct-superimpose
(apply-slide-inset inset full-page)
content)
title
comment
page-count
inset))
(define default-slide-assembler
(lambda (s v-sep p)
(apply vc-append v-sep
(if s
(list (evenize-width (titlet s)) p)
(list p)))))
(define current-slide-assembler
(make-parameter default-slide-assembler))
(define-struct name-only (title))
(define (one-slide/title/inset do-add-slide! use-assem? process v-sep skipped-pages s inset . x)
(let-values ([(x c)
(let loop ([x x][c #f][r null])
(cond
[(null? x) (values (reverse! r) c)]
[(just-a-comment? (car x))
(loop (cdr x) (car x) r)]
[else
(loop (cdr x) c (cons (car x) r))]))])
(let ([content ((if use-assem?
(current-slide-assembler)
default-slide-assembler)
(and (not (name-only? s)) s)
v-sep
(apply vc-append
gap-size
(map evenize-width (process x))))])
(do-add-slide!
content
(if (name-only? s) (name-only-title s) s)
c
(+ 1 skipped-pages)
inset))))
(define (slide-error nested string . args)
(apply error
(let loop ([nested nested])
(if (null? nested)
'slide*
(string->symbol (format "~a of ~a" (car nested) (loop (cdr nested))))))
string
args))
(define (do-slide/title/tall/inset do-add-slide! use-assem? skip-ok? process v-sep s inset . x)
(let loop ([l x][nested null])
(or (null? l)
(cond
[(pict? (car l)) (loop (cdr l) nested)]
[(just-a-comment? (car l)) (loop (cdr l) nested)]
[(memq (car l) '(next next!)) (and (or (pair? l)
(slide-error nested "argument sequence contains 'next at end"))
(loop (cdr l) nested))]
[(memq (car l) '(alts alts~)) (and (or (pair? (cdr l))
(slide-error nested "argument sequence contains '~a at end" (car l)))
(let ([a (cadr l)])
(and (or (list? a)
(slide-error nested "non-list after '~a: ~e" (car l) a))
(andmap (lambda (sl)
(unless (list? sl)
(slide-error nested "non-list in list after '~a: ~e"
(car l) sl))
(loop sl (cons (car l) nested)))
a)))
(loop (cddr l) nested))]
[(eq? (car l) 'nothing) (loop (cdr l) nested)]
[else #f])
(slide-error nested "argument sequence contains a bad element: ~e" (car l))))
(let loop ([l x][r null][comment #f][skip-all? #f][skipped 0])
(cond
[(null? l)
(if skip-all?
(add1 skipped)
(begin
(apply one-slide/title/inset do-add-slide! use-assem? process v-sep skipped s inset (reverse r))
0))]
[(memq (car l) '(nothing))
(loop (cdr l) r comment skip-all? skipped)]
[(memq (car l) '(next next!))
(let ([skip? (or skip-all? (and condense? skip-ok? (eq? (car l) 'next)))])
(let ([skipped (if skip?
(add1 skipped)
(begin
(apply one-slide/title/inset do-add-slide! use-assem? process v-sep skipped s inset (reverse r))
0))])
(loop (cdr l) r comment skip-all? skipped)))]
[(memq (car l) '(alts alts~))
(let ([rest (cddr l)])
(let aloop ([al (cadr l)][skipped skipped])
(cond
[(null? al) (loop rest r comment skip-all? skipped)]
[(null? (cdr al))
(loop (append (car al) rest) r comment skip-all? skipped)]
[else
(let ([skip? (or skip-all? (and condense? skip-ok? (eq? (car l) 'alts~)))])
(let ([skipped (loop (car al) r comment skip? skipped)])
(aloop (cdr al) skipped)))])))]
[else (loop (cdr l) (cons (car l) r) comment skip-all? skipped)])))
(define (make-slide-inset l t r b)
(make-sinset l t r b))
(define (slide/title/tall/inset/gap v-sep s inset . x)
(apply do-slide/title/tall/inset do-add-slide! #t #t values v-sep s inset x))
(define (slide/title/tall/inset s inset . x)
(apply slide/title/tall/inset/gap gap-size s inset x))
(define (slide/name/tall/inset s inset . x)
(apply slide/title/tall/inset (make-name-only s) inset x))
(define (slide/title/tall/gap v-sep s . x)
(apply do-slide/title/tall/inset do-add-slide! #t #t values v-sep s zero-inset x))
(define (slide/title/tall s . x)
(apply slide/title/tall/gap gap-size s x))
(define (slide/name/tall s . x)
(apply slide/title/tall (make-name-only s) x))
(define (slide/title s . x)
(apply slide/title/tall/gap (* 2 gap-size) s x))
(define (slide/name s . x)
(apply slide/title (make-name-only s) x))
(define (slide/title/inset s inset . x)
(apply slide/title/tall/inset/gap (* 2 gap-size) s inset x))
(define (slide/name/inset s inset . x)
(apply slide/title/inset (make-name-only s) inset x))
(define (slide/title/center/inset s inset . x)
(let ([max-width 0]
[max-height 0]
[combine (lambda (x)
(apply vc-append gap-size
(map
evenize-width
x)))])
(apply do-slide/title/tall/inset
(lambda (content title comment page-count inset)
(set! max-width (frp:max max-width
(pict-width content))
)
(set! max-height (frp:max max-height
(pict-height content))
)
)
#f
#f
(lambda (x) (list (combine x)))
0 #f inset x)
(apply do-slide/title/tall/inset
do-add-slide!
#t
#t
(lambda (x)
(list
(cc-superimpose
(apply-slide-inset inset (if (string? s)
titleless-page
full-page))
(ct-superimpose
(blank max-width max-height)
(combine x)))))
0 s inset x)))
(define (slide/name/center/inset s inset . x)
(apply slide/title/center/inset (make-name-only s) inset x))
(define (slide/title/center s . x)
(apply slide/title/center/inset s zero-inset x))
(define (slide/name/center s . x)
(apply slide/title/center (make-name-only s) x))
(define (slide . x) (apply slide/title #f x))
(define (slide/inset inset . x) (apply slide/title/inset #f inset x))
(define (slide/center . x) (apply slide/title/center #f x))
(define (slide/center/inset inset . x) (apply slide/title/center/inset #f inset x))
(define most-recent-slide
(case-lambda
[() (most-recent-slide 0)]
[(n) (viewer:most-recent-talk-slide)]))
(define retract-most-recent-slide
(lambda ()
(let ([slide (viewer:most-recent-talk-slide)])
(when slide
(set! page-number (sliderec-page slide))
(viewer:retract-talk-slide!)
slide))))
(define re-slide
(opt-lambda (s [addition #f])
(unless (sliderec? s)
(raise-type-error 're-slide "slide" s))
(viewer:add-talk-slide!
(make-sliderec
(let ([orig (sliderec-drawer s)]
[extra (if addition
(make-pict-drawer addition)
void)])
(lambda (dc x y)
(orig dc x y)
(extra dc x y)))
(sliderec-title s)
(sliderec-comment s)
page-number
1
(sliderec-inset s)
null))
(set! page-number (+ page-number 1))))
(define (start-at-recent-slide)
(viewer:set-init-page! (max 0 (- page-number 2))))
(define (done-making-slides)
(viewer:done-making-slides))
(define (make-outline . l)
(define ah (arrowhead gap-size 0))
(define current-item (colorize (hc-append (- (/ gap-size 2)) ah ah) blue))
(define other-item (rc-superimpose (ghost current-item) (colorize ah "light gray")))
(lambda (which)
(slide/name
(format "--~a--"
(let loop ([l l])
(cond
[(null? l) "<unknown>"]
[(eq? (car l) which)
(cadr l)]
[else (loop (cdddr l))])))
(blank (+ title-h gap-size))
(lc-superimpose
(blank (pict-width full-page) 0)
(let loop ([l l])
(cond
[(null? l) (blank)]
[else
(let ([current? (or (eq? which (car l))
(and (list? (car l))
(memq which (car l))))])
(vc-append
gap-size
(page-para
(hbl-append
(quotient gap-size 2)
(if current?
current-item
other-item)
(let ([p (cadr l)])
(if (pict? p)
p
(bt p)))))
(let ([rest (loop (cdddr l))]
[sub-items (caddr l)])
(if (and current?
sub-items
(not (null? sub-items)))
(vc-append
gap-size
(sub-items which)
rest)
rest))))]))))))
(define (comment . s)
(make-just-a-comment s))
(define (shift-no-sep l)
(let loop ([l
(let loop ([l l])
(cond
[(null? l) null]
[(pair? (car l)) (append (loop (car l)) (loop (cdr l)))]
[else (cons (car l) (loop (cdr l)))]))]
[a null])
(cond
[(null? l) (reverse a)]
[(null? a) (loop (cdr l) (list (car l)))]
[(and (string? (car l))
(regexp-match #rx"^[-',. :;?!)]" (car l)))
(let ([m (regexp-match #rx"^([^ ]*) (.*)$" (car l))])
(if m
(if (string? (car a))
(loop (cdr l)
(list* (caddr m)
(string-append (car a) (cadr m))
(cdr a)))
(loop (cdr l)
(list* (caddr m)
(hbl-append (car a) (t (cadr m)))
(cdr a))))
(if (string? (car a))
(loop (cdr l)
(cons (string-append (car a) (car l))
(cdr a)))
(loop (cdr l)
(cons (hbl-append (car a) (t (car l)))
(cdr a))))))]
[else (loop (cdr l) (cons (car l) a))])))
(define (para*/align v-append w . s)
(define space (t " "))
(let loop ([pre #f][s (shift-no-sep s)][rest null])
(cond
[(null? s)
(if (null? rest)
(or pre (blank))
(loop pre (car rest) (cdr rest)))]
[(list? s) (loop pre (car s) (append (cdr s) rest))]
[else
(let* ([p (if (string? s) (t s) s)])
(cond
[(< (+ (if pre (pict-width pre) 0)
(if pre (pict-width space) 0)
(pict-width p))
w)
(loop (if pre
(hbl-append pre space p)
p)
rest null)]
[(and (string? s) (regexp-match "(.*) (.*)" s))
=> (lambda (m)
(loop pre
(cadr m)
(cons
(caddr m)
rest)))]
[(not pre)
(if (null? rest)
p
(v-append
line-sep
p
(loop #f rest null)))]
[else
(v-append
line-sep
pre
(loop p rest null))]))])))
(define (para* w . s)
(para*/align vl-append w s))
(define (para*/r w . s)
(para*/align vr-append w s))
(define (para*/c w . s)
(para*/align vc-append w s))
(define (para/align superimpose v-append w . s)
(superimpose (para*/align v-append w s)
(blank w 0)))
(define (para w . s)
(para/align lbl-superimpose vl-append w s))
(define (para/r w . s)
(para/align rbl-superimpose vr-append w s))
(define (para/c w . s)
(para/align cbl-superimpose vc-append w s))
(define (page-para*/align v-append . s)
(para*/align v-append client-w s))
(define (page-para* . s)
(page-para*/align vl-append s))
(define (page-para*/r . s)
(page-para*/align vr-append s))
(define (page-para*/c . s)
(page-para*/align vc-append s))
(define (page-para/align superimpose v-append . s)
(para/align superimpose v-append client-w s))
(define (page-para . s)
(page-para/align lbl-superimpose vl-append s))
(define (page-para/r . s)
(page-para/align rbl-superimpose vr-append s))
(define (page-para/c . s)
(page-para/align cbl-superimpose vc-append s))
(define (l-combiner para w l)
(apply
vl-append
gap-size
(map (lambda (x) (para w x)) l)))
(define (item*/bullet bullet w . s)
(htl-append (/ gap-size 2)
bullet
(para* (- w
(pict-width bullet)
(/ gap-size 2))
s)))
(define (item* w . s)
(apply item*/bullet bullet w s))
(define (item w . s)
(lbl-superimpose (item* w s)
(blank w 0)))
(define (item/bullet b w . s)
(lbl-superimpose (item*/bullet b w s)
(blank w 0)))
(define (page-item* . s)
(item* client-w s))
(define (page-item . s)
(item client-w s))
(define (page-item*/bullet b . s)
(item*/bullet b client-w s))
(define (page-item/bullet b . s)
(item/bullet b client-w s))
(define (subitem* w . s)
(inset (htl-append (/ gap-size 2)
o-bullet
(para* (- w
(* 2 gap-size)
(pict-width bullet)
(/ gap-size 2))
s))
(* 2 gap-size) 0 0 0))
(define (subitem w . s)
(lbl-superimpose (subitem* w s)
(blank w 0)))
(define (page-subitem* . s)
(subitem* client-w s))
(define (page-subitem . s)
(subitem client-w s))
(define (paras* w . l)
(l-combiner para* w l))
(define (paras w . l)
(l-combiner para w l))
(define (page-paras* . l)
(l-combiner (lambda (x y) (page-para* y)) client-w l))
(define (page-paras . l)
(l-combiner (lambda (x y) (page-para y)) client-w l))
(define (itemize w . l)
(l-combiner item w l))
(define (itemize* w . l)
(l-combiner item* w l))
(define (page-itemize . l)
(l-combiner (lambda (x y) (page-item y)) client-w l))
(define (page-itemize* . l)
(l-combiner (lambda (x y) (page-item* y)) client-w l))
(define (size-in-pixels p)
(if (not (and (= use-screen-w screen-w)
(= use-screen-h screen-h)))
(scale p
(/ screen-w use-screen-w)
(/ screen-h use-screen-h))
p))
(define clickback
(opt-lambda (pict thunk [show-click? #t])
(let ([w (pict-width pict)]
[h (pict-height pict)])
(cons-picture*
pict
`((place
0 0
,(dc (lambda (dc x y)
(let-values ([(sx sy) (send dc get-scale)]
[(dx dy) (send dc get-origin)])
(viewer:add-click-region!
(make-click-region (+ (* x sx) dx)
(+ (* y sy) dy)
(+ (* (+ x w) sx) dx)
(+ (* (+ y h) sy) dy)
thunk
show-click?))))
w h
(pict-ascent pict)
(pict-descent pict))))))))
(define (add-transition! who trans)
(let ([slide (viewer:most-recent-talk-slide)])
(when slide
(set-sliderec-transitions! slide
(append! (sliderec-transitions slide)
(list trans))))))
(define scroll-bm #f)
(define scroll-dc (make-object bitmap-dc%))
(define scroll-transition
(opt-lambda (x y w h dx dy [duration 0.20] [steps 12])
(add-transition! 'scroll-transition
(lambda (offscreen-dc)
(let* ([steps-done 0]
[xs (/ use-screen-w screen-w)]
[ys (/ use-screen-h screen-h)]
[bcw (send (send offscreen-dc get-bitmap) get-width)]
[bch (send (send offscreen-dc get-bitmap) get-height)]
[mx (- margin (/ (- use-screen-w bcw) 2 xs))]
[my (- margin (/ (- use-screen-h bch) 2 ys))]
[x-space (ceiling (* xs (/ (abs dx) steps)))]
[y-space (ceiling (* ys (/ (abs dy) steps)))]
[x-in (if (positive? dx)
x-space
0)]
[y-in (if (positive? dy)
y-space
0)])
(unless (and scroll-bm
(>= (send scroll-bm get-width)
(+ x-space (* xs w)))
(>= (send scroll-bm get-height)
(+ y-space (* ys h))))
(set! scroll-bm (make-bitmap
(inexact->exact (ceiling (+ x-space (* xs w))))
(inexact->exact (ceiling (+ y-space (* ys h))))))
(if (send scroll-bm ok?)
(send scroll-dc set-bitmap scroll-bm)
(set! scroll-bm #f)))
(when scroll-bm
(send scroll-dc clear)
(send scroll-dc draw-bitmap-section (send offscreen-dc get-bitmap)
x-in y-in
(* (+ x mx) xs) (* (+ y my) ys)
(* w xs) (* h ys)))
(lambda (canvas offscreen-dc)
(if (or (not scroll-bm) (= steps-done steps))
'done
(let*-values ([(cw ch) (send canvas get-client-size)])
(let ([xm (- margin (/ (- use-screen-w bcw) 2 xs))]
[ym (- margin (/ (- use-screen-h bch) 2 ys))])
(set! steps-done (add1 steps-done))
(let ([draw
(lambda (dc xm ym)
(send dc draw-bitmap-section
scroll-bm
(- (* (+ x xm (* dx (/ steps-done steps))) xs) x-in)
(- (* (+ y ym (* dy (/ steps-done steps))) ys) y-in)
0 0
(ceiling (* xs (+ w (/ (abs dx) steps))))
(ceiling (* ys (+ h (/ (abs dy) steps))))))])
(draw (send canvas get-dc) xm ym)
(draw offscreen-dc mx my)))
(/ duration steps)))))))))
(define pause-transition
(lambda (time)
(add-transition! 'pause-transition
(lambda (offscreen-dc)
(let ([done? #f])
(lambda (canvas offscreen-dc)
(if done?
'done
(begin
(set! done? #t)
time))))))))
(define (get-page-number) (viewer:get-current-page))
)))
![[logo]](/logo.png){kind=logo}