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Avoid rendering delay when displaying extremely long lines

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Related #666
This commit is contained in:
Junegunn Choi 2016-09-21 01:23:41 +09:00
parent a749e6bd16
commit 00f96aae76
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GPG Key ID: 254BC280FEF9C627
1 changed files with 7 additions and 0 deletions
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7
src/terminal.go
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@ -401,6 +401,8 @@ func displayWidth(runes []rune) int {
const ( const (
minWidth = 16 minWidth = 16
minHeight = 4 minHeight = 4
maxDisplayWidthCalc = 1024
) )
func calculateSize(base int, size sizeSpec, margin int, minSize int) int { func calculateSize(base int, size sizeSpec, margin int, minSize int) int {
@ -651,6 +653,11 @@ func displayWidthWithLimit(runes []rune, prefixWidth int, limit int) int {
} }
func trimLeft(runes []rune, width int) ([]rune, int32) { func trimLeft(runes []rune, width int) ([]rune, int32) {
if len(runes) > maxDisplayWidthCalc && len(runes) > width {
trimmed := len(runes) - width
return runes[trimmed:], int32(trimmed)
}
currentWidth := displayWidth(runes) currentWidth := displayWidth(runes)
var trimmed int32 var trimmed int32