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Macro stepper: navigation preserves visible line range

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svn: r7596
This commit is contained in:
Ryan Culpepper 2007-10-30 22:02:17 +00:00
parent 52c91eb786
commit 2d59128e59
1 changed files with 16 additions and 3 deletions
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17
collects/macro-debugger/view/stepper.ss
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@ -313,12 +313,25 @@
(define end-box (box 0))
(send text get-visible-position-range start-box end-box)
(update)
(send text scroll-to-position (unbox start-box) #f (unbox end-box)))
(send text scroll-to-position (unbox start-box) #f (unbox end-box) 'start))
;; update/save-position : -> void
(define/private (update/save-position)
(save-position)
(update))
(update/preserve-lines-view))
;; update/preserve-lines-view : -> void
(define/public (update/preserve-lines-view)
(define text (send sbview get-text))
(define start-box (box 0))
(define end-box (box 0))
(send text get-visible-line-range start-box end-box)
(update)
(send text scroll-to-position
(send text line-start-position (unbox start-box))
#f
(send text line-start-position (unbox end-box))
'start))
;; update : -> void
;; Updates the terms in the syntax browser to the current step