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Tab horizontal scrolling should not be negative

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Fixes #1467
This commit is contained in:
Zachary Yedidia
2020-01-25 13:17:13 -05:00
parent cf41a587a3
commit 8e7a016917
1 changed files with 12 additions and 2 deletions
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14
internal/display/tabwindow.go
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@@ -45,13 +45,18 @@ func (w *TabWindow) LocFromVisual(vloc buffer.Loc) int {
func (w *TabWindow) Scroll(amt int) {
w.hscroll += amt
w.hscroll = util.Clamp(w.hscroll, 0, w.TotalSize()-w.width)
s := w.TotalSize()
w.hscroll = util.Clamp(w.hscroll, 0, s-w.width)
if s-w.width <= 0 {
w.hscroll = 0
}
}
func (w *TabWindow) TotalSize() int {
sum := 2
for _, n := range w.Names {
sum += utf8.RuneCountInString(n) + 4
sum += runewidth.StringWidth(n) + 4
}
return sum - 4
}
@@ -64,6 +69,7 @@ func (w *TabWindow) SetActive(a int) {
w.active = a
x := 2
s := w.TotalSize()
for i, n := range w.Names {
c := utf8.RuneCountInString(n)
if i == a {
@@ -76,6 +82,10 @@ func (w *TabWindow) SetActive(a int) {
}
x += c + 4
}
if s-w.width <= 0 {
w.hscroll = 0
}
}
func (w *TabWindow) Display() {