173 lines
6.8 KiB
Scheme
173 lines
6.8 KiB
Scheme
#lang scheme/base
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(require mred scheme/class string-constants framework)
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(provide insert-large-letters)
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(define (insert-large-letters comment-prefix comment-character edit parent)
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(let ([str (make-large-letters-dialog comment-prefix comment-character #f)])
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(when (and str
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(not (equal? str "")))
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(render-large-letters comment-prefix comment-character (get-chosen-font) str edit)
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(void))))
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(preferences:set-default 'drscheme:large-letters-font #f (λ (x) (or (and (pair? x)
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(string? (car x))
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(number? (cdr x))
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(integer? (cdr x))
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(<= 1 (cdr x) 255))
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(not x))))
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(define (get-default-font)
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(send (send (editor:get-standard-style-list)
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find-named-style
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"Standard")
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get-font))
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(define (get-chosen-font)
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(let ([pref-val (preferences:get 'drscheme:large-letters-font)])
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(cond
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[pref-val
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(let ([candidate (send the-font-list find-or-create-font (cdr pref-val) (car pref-val) 'default 'normal 'normal)])
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(if (equal? (send candidate get-face) (car pref-val))
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candidate
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(get-default-font)))]
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[else
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(get-default-font)])))
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(define columns-string "~a columns")
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;; make-large-letters-dialog : string char top-level-window<%> -> void
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(define (make-large-letters-dialog comment-prefix comment-character parent)
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(define dlg (new dialog%
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[parent parent]
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[width 700]
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[label (string-constant large-semicolon-letters)]))
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(define text-field (new text-field%
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[parent dlg]
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[label (string-constant text-to-insert)]
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[callback (λ (x y) (update-txt (send text-field get-value)))]))
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(define info-bar (new horizontal-panel%
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[parent dlg]
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[stretchable-height #f]))
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(define font-choice (new choice%
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[label (string-constant fonts)]
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[parent info-bar]
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[choices (get-face-list)]
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[callback
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(λ (x y)
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(let ([old (preferences:get 'drscheme:large-letters-font)])
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(preferences:set 'drscheme:large-letters-font
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(cons (send font-choice get-string-selection)
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(if old
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(cdr old)
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(send (get-default-font) get-point-size))))
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(update-txt (send text-field get-value))))]))
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(define count (new message% [label (format columns-string 1000)] [parent info-bar]))
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(define pane1 (new horizontal-pane% (parent info-bar)))
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(define dark-msg (new bitmap-message% [parent info-bar]))
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(define pane2 (new horizontal-pane% (parent info-bar)))
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(define txt (new scheme:text%))
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(define ec (new editor-canvas% [parent dlg] [editor txt]))
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(define button-panel (new horizontal-panel%
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[parent dlg]
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[stretchable-height #f]
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[alignment '(right center)]))
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(define ok? #f)
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(define-values (ok cancel)
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(gui-utils:ok/cancel-buttons button-panel
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(λ (x y) (set! ok? #t) (send dlg show #f))
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(λ (x y) (send dlg show #f))))
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(define (update-txt str)
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(send txt begin-edit-sequence)
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(send txt lock #f)
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(send txt delete 0 (send txt last-position))
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(let ([bm (render-large-letters comment-prefix comment-character (get-chosen-font) str txt)])
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(send ec set-line-count (+ 1 (send txt last-paragraph)))
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(send txt lock #t)
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(send txt end-edit-sequence)
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(send count set-label (format columns-string (get-max-line-width txt)))
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(send dark-msg set-bm bm)))
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(send font-choice set-string-selection (send (get-chosen-font) get-face))
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(send txt auto-wrap #f)
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(update-txt " ")
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(send text-field focus)
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(send dlg show #t)
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(and ok? (send text-field get-value)))
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(define (get-max-line-width txt)
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(let loop ([i (+ (send txt last-paragraph) 1)]
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[m 0])
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(cond
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[(zero? i) m]
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[else (loop (- i 1)
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(max m (- (send txt paragraph-end-position (- i 1))
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(send txt paragraph-start-position (- i 1)))))])))
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(define bitmap-message%
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(class canvas%
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(inherit min-width min-height get-dc)
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(define bm #f)
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(define/override (on-paint)
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(when bm
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(let ([dc (get-dc)])
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(send dc draw-bitmap bm 0 0))))
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(define/public (set-bm b)
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(set! bm b)
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(min-width (send bm get-width))
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(min-height (send bm get-height)))
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(super-new (stretchable-width #f)
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(stretchable-height #f))))
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(define (render-large-letters comment-prefix comment-character the-font str edit)
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(define bdc (make-object bitmap-dc% (make-object bitmap% 1 1 #t)))
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(define-values (tw raw-th td ta) (send bdc get-text-extent str the-font))
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(define th (let-values ([(_1 h _2 _3) (send bdc get-text-extent "X" the-font)])
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(max raw-th h)))
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(define tmp-color (make-object color%))
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(define (get-char x y)
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(send bdc get-pixel x y tmp-color)
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(let ([red (send tmp-color red)])
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(if (= red 0)
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comment-character
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#\space)))
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(define bitmap
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(make-object bitmap%
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(max 1 (inexact->exact tw))
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(inexact->exact th)
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#t))
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(define (fetch-line y)
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(let loop ([x (send bitmap get-width)]
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[chars null])
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(cond
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[(zero? x) (apply string chars)]
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[else (loop (- x 1) (cons (get-char (- x 1) y) chars))])))
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(send bdc set-bitmap bitmap)
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(send bdc clear)
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(send bdc set-font the-font)
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(send bdc draw-text str 0 0)
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(send edit begin-edit-sequence)
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(let ([start (send edit get-start-position)]
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[end (send edit get-end-position)])
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(send edit delete start end)
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(send edit insert "\n" start start)
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(let loop ([y (send bitmap get-height)])
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(unless (zero? y)
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(send edit insert (fetch-line (- y 1)) start start)
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(send edit insert comment-prefix start start)
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(send edit insert "\n" start start)
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(loop (- y 1)))))
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(send edit end-edit-sequence)
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(send bdc set-bitmap #f)
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bitmap)
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;(make-large-letters-dialog ";" #\; #f)
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