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Commit aa4291a5 authored by Dan Holtby's avatar Dan Holtby
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handle pastes properly, add preferences and dialog

parent e0a3e2af
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graphic-block.rkt
View file @ aa4291a5
......@@ -4,6 +4,7 @@
racket/gui/base
racket/unit
framework
string-constants
mrlib/switchable-button)
(provide tool@)
......@@ -13,7 +14,7 @@
(export drracket:tool-exports^)
(define block-WXME-mixin
(mixin ((class->interface text%)) ()
(mixin (text:basic<%>) ()
(inherit begin-edit-sequence
get-snip-position
......@@ -21,76 +22,126 @@
find-snip
split-snip
end-edit-sequence
get-top-level-window
insert
delete
get-text)
(define updating #f)
(define updating #f) ; whether current insert is being done by the wxme->text code
(define undoing #f) ; whether current insert is being done by undo/redo
(define paste-info #f) ; whether current insert is being done as part of a paste
(define/public (ask-convert?)
(cond
[(preferences:get 'framework:ask-about-wxme-conversion)
(define-values (mbr checked?)
(message+check-box/custom
(string-constant drscheme)
"The string you inserted contains fractions or other non-text elements. Convert them to text?"
(string-constant dont-ask-again)
"Convert to text"
(string-constant leave-alone)
#f
(get-top-level-window)
(cons (if (preferences:get 'framework:do-wxme-conversion)
'default=1
'default=2)
'(caution))
2))
(define convert? (not (equal? 2 mbr)))
(preferences:set 'framework:ask-about-wxme-conversion (not checked?))
(preferences:set 'framework:do-wxme-conversion convert?)
convert?]
[else
(preferences:get 'framework:do-wxme-conversion)]))
(define/augment (on-insert start len)
;(eprintf "(on-insert ~a ~a) (in-edit-sequence?) => ~a\n" start len (send this in-edit-sequence?))
(inner (void) on-insert start len))
;; copied from text-normalize-paste. Seems to work
(define (as-a-paste thunk)
(dynamic-wind
(λ () (set! paste-info #t))
(λ ()
(thunk)
(define local-paste-info paste-info)
(set! paste-info #f)
(deal-with-paste local-paste-info))
;; use the dynamic wind to be sure that the paste-info is set back to #f
;; in the case that the middle thunk raises an exception
(λ () (set! paste-info #f))))
(define/override (do-paste start the-time)
(as-a-paste (λ () (super do-paste start the-time))))
(define/augment (after-insert start len)
(inner (void) after-insert start len)
(unless updating (check-range start (+ start len)))
)
;; It didn't seem to work if I updated one snip at a time, so it just logs the whole
;; modified range and replaces the non-text snips in one pass
(cond [(pair? paste-info)
(set! paste-info (cons (min (car paste-info) start)
(max (cdr paste-info) (+ start len))))]
[paste-info
(set! paste-info (cons start (+ start len)))]
[(not updating) (check-range start (+ start len))]))
(define undoing #f)
(define/private (deal-with-paste local-paste-info)
(when (pair? local-paste-info)
(check-range (car local-paste-info) (cdr local-paste-info))))
;; (check-range start stop) replaces the snips from start to stop with
;; a single string snip, converting number snips to plain text literals
;; and replacign all other non-string snips with comments
;; If currently undoing / redoing, check-range does nothing (otherwise the undo/redo will
;; convert the text twice, once here and then again as part of the chained edit sequence that
;; this method already added
;; TODO: replace comment boxes with block comments?
;; check-range: Nat Nat -> Void
(define/private (check-range start stop)
(split-snip start)
(split-snip stop)
(let loop ([snip (find-snip start 'after-or-none)]
[new-text (open-output-string)]
[changed? #f])
(cond [(or (not snip) (<= stop (get-snip-position snip)))
(when (and changed? (not undoing))
(let ([s (get-output-string new-text)])
;(eprintf "Base case : ~v [~v:~v]\n" s start stop)
(set! updating #t)
(send this add-undo
(lambda ()
(set! undoing #f)
#t))
(send this add-undo
(lambda ()
(set! undoing #t)
#t))
(begin-edit-sequence #f #t)
;(set-position start stop)
;(send this undo)
(delete start stop #f)
(end-edit-sequence)
(begin-edit-sequence #t #f)
(set-position start stop)
(insert (get-output-string new-text) start 'same #f)
(end-edit-sequence)
(send this add-undo
(lambda ()
(set! undoing #t)
#t))
(send this add-undo
(lambda ()
(set! undoing #f)
#t))
(set! updating #f)
)
)
]
[(is-a? snip string-snip%)
(display (send snip get-text 0 (send snip get-count)) new-text)
(loop (send snip next) new-text changed?)]
[else
(cond [(number-snip:is-number-snip? snip)
(write (number-snip:get-number snip) new-text)]
[else (fprintf new-text "#|Failed to insert ~v|#" snip)])
(loop (send snip next)
new-text
#t)])))
(unless undoing
(split-snip start)
(split-snip stop)
(let loop ([snip (find-snip start 'after-or-none)]
[new-text (open-output-string)]
[changed? #f])
(cond [(or (not snip) (<= stop (get-snip-position snip)))
(when (and changed? (ask-convert?))
(let ([s (get-output-string new-text)])
(set! updating #t)
(send this add-undo
(lambda ()
(set! undoing #f)
#t))
(send this add-undo
(lambda ()
(set! undoing #t)
#t))
(begin-edit-sequence #f #t) ; these go before the change so that
(delete start stop #f) ; a redo is marked
(end-edit-sequence)
(begin-edit-sequence #t #f)
(set-position start stop)
(insert (get-output-string new-text) start 'same #f)
(end-edit-sequence)
(send this add-undo ; these go after the change, so an undo is marked
(lambda ()
(set! undoing #t)
#t))
(send this add-undo
(lambda ()
(set! undoing #f)
#t))
(set! updating #f)))]
[(is-a? snip string-snip%)
(display (send snip get-text 0 (send snip get-count)) new-text)
(loop (send snip next) new-text changed?)]
[else ; to any CS135 students reading this: else cond isn't terrible in full Racket because of side effects ;)
(cond [(number-snip:is-number-snip? snip)
(write (number-snip:get-number snip) new-text)]
[else (fprintf new-text "#|Failed to insert ~v|#" snip)])
(loop (send snip next)
new-text
#t)]))))
(super-new)))
......@@ -102,5 +153,15 @@
(define (phase1) (void))
(define (phase2) (void))
(preferences:set-default 'framework:ask-about-wxme-conversion #t boolean?)
(preferences:set-default 'framework:do-wxme-conversion #t boolean?)
(preferences:add-to-editor-checkbox-panel
(λ (editor-panel)
(preferences:add-check editor-panel
'framework:ask-about-wxme-conversion
"Ask before converting graphics to plain text")
(preferences:add-check editor-panel
'framework:do-wxme-conversion
"Convert graphics to plain text")))
(drracket:get/extend:extend-definitions-text block-WXME-mixin)))
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