|
|
#lang racket/base
|
|
|
(require "racket.rkt")
|
|
|
|
|
|
(require "image.rkt")
|
|
|
(provide image-mixin)
|
|
|
|
|
|
(define (image-mixin [% mixin-tester%])
|
|
|
(class %
|
|
|
(super-new)
|
|
|
(field [_imageRegistry #f]
|
|
|
[_imageCount #f])
|
|
|
|
|
|
(as-methods
|
|
|
initImages
|
|
|
image
|
|
|
openImage
|
|
|
)))
|
|
|
|
|
|
|
|
|
(define/contract (initImages this)
|
|
|
(->m void?)
|
|
|
(set-field! _imageRegistry this (mhash))
|
|
|
(set-field! _imageCount this 0))
|
|
|
|
|
|
|
|
|
(define/contract (image this src [x #f] [y #f] [options mhash])
|
|
|
((any/c) ((or/c number? #f) (or/c number? #f) hash?) . ->*m . object?)
|
|
|
(set! x (or x (· options x) (· this x)))
|
|
|
(set! y (or y (· options y) (· this y)))
|
|
|
|
|
|
(define image (cond
|
|
|
[(and (string? src) (hash-ref (· this _imageRegistry) src #f))]
|
|
|
[(and (object? src) (· src width) (· src height)) src]
|
|
|
[else (send this openImage src)]))
|
|
|
|
|
|
(unless (· image obj) (send image embed this))
|
|
|
|
|
|
(hash-ref! (· this page xobjects) (· image label) (· image obj))
|
|
|
|
|
|
(define w (or (hash-ref options 'width #f) (· image width)))
|
|
|
(define h (or (hash-ref options 'height #f) (· image height)))
|
|
|
(define wp #f)
|
|
|
(define hp #f)
|
|
|
(define bp #f)
|
|
|
(define ip #f)
|
|
|
(define bw #f)
|
|
|
(define bh #f)
|
|
|
|
|
|
(cond
|
|
|
[(and (hash-ref options 'width #f) (not (hash-ref options 'height #f)))
|
|
|
(set! wp (/ w (· image width)))
|
|
|
(set! w (* (· image width) wp))
|
|
|
(set! h (* (· image height) wp))]
|
|
|
[(and (hash-ref options 'height #f) (not (hash-ref options 'width #f)))
|
|
|
(set! hp (/ h (· image width)))
|
|
|
(set! w (* (· image width) hp))
|
|
|
(set! h (* (· image height) hp))]
|
|
|
[(hash-ref options 'scale #f)
|
|
|
(set! w (* (· image width) (· options scale)))
|
|
|
(set! h (* (· image height) (· options scale)))]
|
|
|
[(hash-ref options 'fit #f)
|
|
|
(match-define (list bw bh) (· options fit))
|
|
|
(set! bp (/ bw bh))
|
|
|
(set! ip (/ (· image width) (· image height)))
|
|
|
(cond
|
|
|
[(> ip bp)
|
|
|
(set! w bw)
|
|
|
(set! h (/ bw ip))]
|
|
|
[else
|
|
|
(set! h bh)
|
|
|
(set! w (* bh ip))])]
|
|
|
[(hash-ref options 'cover #f)
|
|
|
(match-define (list bw bh) (· options cover))
|
|
|
(set! bp (/ bw bh))
|
|
|
(set! ip (/ (· image width) (· image height)))
|
|
|
(cond
|
|
|
[(> ip bp)
|
|
|
(set! h bh)
|
|
|
(set! w (* bh ip))]
|
|
|
[else
|
|
|
(set! w bw)
|
|
|
(set! h (/ bw ip))])])
|
|
|
|
|
|
(when (or (hash-ref options 'fit #f) (hash-ref options 'cover #f))
|
|
|
(cond
|
|
|
[(equal? (hash-ref options 'align #f) "center")
|
|
|
(set! x (+ x (/ bw 2) (- (/ w 2))))]
|
|
|
[(equal? (hash-ref options 'align #f) "right")
|
|
|
(set! x (+ x bw - w))])
|
|
|
|
|
|
(cond
|
|
|
[(equal? (hash-ref options 'valign #f) "center")
|
|
|
(set! y (+ y (/ bh 2) (- (/ h 2))))]
|
|
|
[(equal? (hash-ref options 'valign #f) "bottom")
|
|
|
(set! y (+ y bh - h))]))
|
|
|
|
|
|
;; Set the current y position to below the image if it is in the document flow
|
|
|
(when (equal? (· this y) y) (increment-field! y this h))
|
|
|
|
|
|
(· this save)
|
|
|
(send this transform w 0 0 (- h) x (+ y h))
|
|
|
(send this addContent (format "/~a Do" (· image label)))
|
|
|
(· this restore)
|
|
|
this
|
|
|
#;(error 'stop-in-images:image))
|
|
|
|
|
|
(define/contract (openImage this src)
|
|
|
(any/c . ->m . object?)
|
|
|
(cond
|
|
|
[(and (string? src) (hash-ref (· this _imageRegistry) src #f))]
|
|
|
[else
|
|
|
(define new-image
|
|
|
(PDFImage-open src (format "I~a" (increment-field! _imageCount this))))
|
|
|
(when (string? src) (hash-set! (· this _imageRegistry) src new-image))
|
|
|
new-image])) |