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Improve rendering time of long lines

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This commit is contained in:
Junegunn Choi 2016-08-14 17:44:11 +09:00
parent 41e916a511
commit 8df7d962e6
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GPG Key ID: 254BC280FEF9C627
1 changed files with 14 additions and 5 deletions
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19
src/terminal.go
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@ -656,6 +656,17 @@ func trimLeft(runes []rune, width int) ([]rune, int32) {
return runes, trimmed
}
func overflow(runes []rune, max int) bool {
l := 0
for _, r := range runes {
l += runeWidth(r, l)
if l > max {
return true
}
}
return false
}
func (t *Terminal) printHighlighted(item *Item, bold bool, col1 int, col2 int, current bool) {
var maxe int
for _, offset := range item.offsets {
@ -668,17 +679,15 @@ func (t *Terminal) printHighlighted(item *Item, bold bool, col1 int, col2 int, c
offsets := item.colorOffsets(col2, bold, current)
maxWidth := t.window.Width - 3
maxe = util.Constrain(maxe+util.Min(maxWidth/2-2, t.hscrollOff), 0, len(text))
fullWidth := displayWidth(text)
if fullWidth > maxWidth {
if overflow(text, maxWidth) {
if t.hscroll {
// Stri..
matchEndWidth := displayWidth(text[:maxe])
if matchEndWidth <= maxWidth-2 {
if !overflow(text[:maxe], maxWidth-2) {
text, _ = trimRight(text, maxWidth-2)
text = append(text, []rune("..")...)
} else {
// Stri..
if matchEndWidth < fullWidth-2 {
if overflow(text[maxe:], 2) {
text = append(text[:maxe], []rune("..")...)
}
// ..ri..