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lazygit/pkg/gui/context/view_trait.go
2022-03-17 19:13:40 +11:00

73 lines
1.6 KiB
Go

package context
import (
"github.com/jesseduffield/gocui"
"github.com/jesseduffield/lazygit/pkg/gui/types"
"github.com/jesseduffield/lazygit/pkg/utils"
)
const HORIZONTAL_SCROLL_FACTOR = 3
type ViewTrait struct {
view *gocui.View
}
var _ types.IViewTrait = &ViewTrait{}
func NewViewTrait(view *gocui.View) *ViewTrait {
return &ViewTrait{view: view}
}
func (self *ViewTrait) FocusPoint(yIdx int) {
self.view.FocusPoint(self.view.OriginX(), yIdx)
}
func (self *ViewTrait) SetViewPortContent(content string) {
_, y := self.view.Origin()
self.view.OverwriteLines(y, content)
}
func (self *ViewTrait) SetContent(content string) {
self.view.SetContent(content)
}
func (self *ViewTrait) SetFooter(value string) {
self.view.Footer = value
}
func (self *ViewTrait) SetOriginX(value int) {
_ = self.view.SetOriginX(value)
}
// tells us the bounds of line indexes shown in the view currently
func (self *ViewTrait) ViewPortYBounds() (int, int) {
_, min := self.view.Origin()
max := self.view.InnerHeight() + 1
return min, max
}
func (self *ViewTrait) ScrollLeft() {
newOriginX := utils.Max(self.view.OriginX()-self.view.InnerWidth()/HORIZONTAL_SCROLL_FACTOR, 0)
_ = self.view.SetOriginX(newOriginX)
}
func (self *ViewTrait) ScrollRight() {
_ = self.view.SetOriginX(self.view.OriginX() + self.view.InnerWidth()/HORIZONTAL_SCROLL_FACTOR)
}
// this returns the amount we'll scroll if we want to scroll by a page.
func (self *ViewTrait) PageDelta() int {
_, height := self.view.Size()
delta := height - 1
if delta == 0 {
return 1
}
return delta
}
func (self *ViewTrait) SelectedLineIdx() int {
return self.view.SelectedLineIdx()
}