This repository has been archived on 2024-01-06. You can view files and clone it, but cannot push or open issues or pull requests.
Files
srv/cui/scroll.go
Dave Gallant a13d212968 Determine when to apply autoscroll
When shrinking the window, scrolling was limited to only the current
view buffer. This should implement auto-scrolling. It's a little bit
janky, but should be sufficient for now.
2020-04-08 00:21:18 -04:00

42 lines
735 B
Go

package cui
import (
"strings"
"github.com/jroimartin/gocui"
)
func scroll(g *gocui.Gui, v *gocui.View, direction int) error {
if v != nil {
_, y := v.Size()
ox, oy := v.Origin()
cx, cy := v.Cursor()
if err := v.SetCursor(cx, cy-1); err != nil && oy > 0 {
if err := v.SetOrigin(ox, oy-1); err != nil {
return err
}
}
// If we're nearing a boundary
if oy+direction > strings.Count(v.ViewBuffer(), "\n")+y-direction {
v.Autoscroll = true
} else {
v.Autoscroll = false
v.SetOrigin(ox, oy+direction)
return nil
}
}
return nil
}
func cursorDown(g *gocui.Gui, v *gocui.View) error {
return scroll(g, v, 1)
}
func cursorUp(g *gocui.Gui, v *gocui.View) error {
return scroll(g, v, -1)
}