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improved check syntax's jump-to-definition so it scrolls to a more natural place

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This commit is contained in:
Robby Findler 2010-07-28 13:47:29 -05:00
parent 79d0c581d4
commit 7352d86f1f
1 changed files with 37 additions and 1 deletions
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38
collects/drracket/private/syncheck/traversals.rkt
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@ -1114,7 +1114,43 @@
(when (and (is-a? src text%)
pos
span)
(send src set-position (- pos 1) (+ pos span -1)))))
(send src begin-edit-sequence)
;; try to scroll so stx's location is
;; near the top of the visible region
(let ([admin (send src get-admin)])
(when admin
(let ([wb (box 0.0)]
[hb (box 0.0)]
[xb (box 0.0)]
[yb (box 0.0)])
(send admin get-view #f #f wb hb)
(send src position-location (- pos 1) xb yb #t #f #t)
(let ([w (unbox wb)]
[h (unbox hb)]
[x (unbox xb)]
[y (unbox yb)])
(send src scroll-editor-to
(max 0 (- x (* .1 w)))
(max 0 (- y (* .1 h)))
w h
#t
'none)))))
(let ([admin (send src get-admin)])
(when admin
(let-values ([(w h) (send admin get-view-size)]
[(x y) (send src position-location (- pos 1))])
(send src scroll-editor-to
(max 0 (- x (* .1 w)))
(max 0 (- y (* .1 h)))
w h
#t
'none))))
(send src set-position (- pos 1) (+ pos span -1))
(send src end-edit-sequence))))
;; hash-table[syntax -o> (listof syntax)] -> void
(define (add-tail-ht-links tail-ht)