38 lines
958 B
Go
38 lines
958 B
Go
package view
|
|
|
|
import (
|
|
"errors"
|
|
"github.com/awesome-gocui/gocui"
|
|
)
|
|
|
|
// CursorDown moves the cursor down in the currently selected gocui pane, scrolling the screen as needed.
|
|
func CursorDown(g *gocui.Gui, v *gocui.View) error {
|
|
return CursorStep(g, v, 1)
|
|
}
|
|
|
|
// CursorUp moves the cursor up in the currently selected gocui pane, scrolling the screen as needed.
|
|
func CursorUp(g *gocui.Gui, v *gocui.View) error {
|
|
return CursorStep(g, v, -1)
|
|
}
|
|
|
|
// Moves the cursor the given step distance, setting the origin to the new cursor line
|
|
func CursorStep(g *gocui.Gui, v *gocui.View, step int) error {
|
|
cx, cy := v.Cursor()
|
|
|
|
// if there isn't a next line
|
|
line, err := v.Line(cy + step)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if len(line) == 0 {
|
|
return errors.New("unable to move the cursor, empty line")
|
|
}
|
|
if err := v.SetCursor(cx, cy+step); err != nil {
|
|
ox, oy := v.Origin()
|
|
if err := v.SetOrigin(ox, oy+step); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|