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package context
import (
"fmt"
"github.com/jesseduffield/gocui"
"github.com/jesseduffield/lazygit/pkg/config"
"github.com/jesseduffield/lazygit/pkg/gui/types"
"github.com/jesseduffield/lazygit/pkg/utils"
)
type ListContextTrait struct {
base types.IBaseContext
list types.IList
viewTrait *ViewTrait
takeFocus func() error
GetDisplayStrings func(startIdx int, length int) [][]string
OnFocus func(...types.OnFocusOpts) error
OnRenderToMain func(...types.OnFocusOpts) error
OnFocusLost func() error
// if this is true, we'll call GetDisplayStrings for just the visible part of the
// view and re-render that. This is useful when you need to render different
// content based on the selection (e.g. for showing the selected commit)
RenderSelection bool
c *types.ControllerCommon
}
func (self *ListContextTrait) GetPanelState() types.IListPanelState {
return self.list
}
func (self *ListContextTrait) FocusLine() {
// we need a way of knowing whether we've rendered to the view yet.
self.viewTrait.FocusPoint(self.list.GetSelectedLineIdx())
if self.RenderSelection {
min, max := self.viewTrait.ViewPortYBounds()
displayStrings := self.GetDisplayStrings(min, max)
content := utils.RenderDisplayStrings(displayStrings)
self.viewTrait.SetViewPortContent(content)
}
self.viewTrait.SetFooter(formatListFooter(self.list.GetSelectedLineIdx(), self.list.GetItemsLength()))
}
func formatListFooter(selectedLineIdx int, length int) string {
return fmt.Sprintf("%d of %d", selectedLineIdx+1, length)
}
// OnFocus assumes that the content of the context has already been rendered to the view. OnRender is the function which actually renders the content to the view
func (self *ListContextTrait) HandleRender() error {
if self.GetDisplayStrings != nil {
self.list.RefreshSelectedIdx()
content := utils.RenderDisplayStrings(self.GetDisplayStrings(0, self.list.GetItemsLength()))
self.viewTrait.SetContent(content)
self.c.Render()
}
return nil
}
func (self *ListContextTrait) HandleFocusLost() error {
if self.OnFocusLost != nil {
return self.OnFocusLost()
}
self.viewTrait.SetOriginX(0)
return nil
}
func (self *ListContextTrait) HandleFocus(opts ...types.OnFocusOpts) error {
self.FocusLine()
if self.OnFocus != nil {
if err := self.OnFocus(opts...); err != nil {
return err
}
}
if self.OnRenderToMain != nil {
if err := self.OnRenderToMain(opts...); err != nil {
return err
}
}
return nil
}
func (self *ListContextTrait) HandlePrevLine() error {
return self.handleLineChange(-1)
}
func (self *ListContextTrait) HandleNextLine() error {
return self.handleLineChange(1)
}
func (self *ListContextTrait) HandleScrollLeft() error {
return self.scroll(self.viewTrait.ScrollLeft)
}
func (self *ListContextTrait) HandleScrollRight() error {
return self.scroll(self.viewTrait.ScrollRight)
}
func (self *ListContextTrait) scroll(scrollFunc func()) error {
scrollFunc()
return self.HandleFocus()
}
func (self *ListContextTrait) handleLineChange(change int) error {
before := self.list.GetSelectedLineIdx()
self.list.MoveSelectedLine(change)
after := self.list.GetSelectedLineIdx()
// doing this check so that if we're holding the up key at the start of the list
// we're not constantly re-rendering the main view.
if before != after {
return self.HandleFocus()
}
return nil
}
func (self *ListContextTrait) HandlePrevPage() error {
return self.handleLineChange(-self.viewTrait.PageDelta())
}
func (self *ListContextTrait) HandleNextPage() error {
return self.handleLineChange(self.viewTrait.PageDelta())
}
func (self *ListContextTrait) HandleGotoTop() error {
return self.handleLineChange(-self.list.GetItemsLength())
}
func (self *ListContextTrait) HandleGotoBottom() error {
return self.handleLineChange(self.list.GetItemsLength())
}
func (self *ListContextTrait) HandleClick(onClick func() error) error {
prevSelectedLineIdx := self.list.GetSelectedLineIdx()
// because we're handling a click, we need to determine the new line idx based
// on the view itself.
newSelectedLineIdx := self.viewTrait.SelectedLineIdx()
currentContextKey := self.c.CurrentContext().GetKey()
alreadyFocused := currentContextKey == self.base.GetKey()
// we need to focus the view
if !alreadyFocused {
if err := self.takeFocus(); err != nil {
return err
}
}
if newSelectedLineIdx > self.list.GetItemsLength()-1 {
return nil
}
self.list.SetSelectedLineIdx(newSelectedLineIdx)
if prevSelectedLineIdx == newSelectedLineIdx && alreadyFocused && onClick != nil {
return onClick()
}
return self.HandleFocus()
}
func (self *ListContextTrait) OnSearchSelect(selectedLineIdx int) error {
self.list.SetSelectedLineIdx(selectedLineIdx)
return self.HandleFocus()
}
func (self *ListContextTrait) HandleRenderToMain() error {
if self.OnRenderToMain != nil {
return self.OnRenderToMain()
}
return nil
}
func (self *ListContextTrait) Keybindings(
getKey func(key string) interface{},
config config.KeybindingConfig,
guards types.KeybindingGuards,
) []*types.Binding {
return []*types.Binding{
{Tag: "navigation", Key: getKey(config.Universal.PrevItemAlt), Modifier: gocui.ModNone, Handler: self.HandlePrevLine},
{Tag: "navigation", Key: getKey(config.Universal.PrevItem), Modifier: gocui.ModNone, Handler: self.HandlePrevLine},
{Tag: "navigation", Key: gocui.MouseWheelUp, Modifier: gocui.ModNone, Handler: self.HandlePrevLine},
{Tag: "navigation", Key: getKey(config.Universal.NextItemAlt), Modifier: gocui.ModNone, Handler: self.HandleNextLine},
{Tag: "navigation", Key: getKey(config.Universal.NextItem), Modifier: gocui.ModNone, Handler: self.HandleNextLine},
{Tag: "navigation", Key: getKey(config.Universal.PrevPage), Modifier: gocui.ModNone, Handler: self.HandlePrevPage, Description: self.c.Tr.LcPrevPage},
{Tag: "navigation", Key: getKey(config.Universal.NextPage), Modifier: gocui.ModNone, Handler: self.HandleNextPage, Description: self.c.Tr.LcNextPage},
{Tag: "navigation", Key: getKey(config.Universal.GotoTop), Modifier: gocui.ModNone, Handler: self.HandleGotoTop, Description: self.c.Tr.LcGotoTop},
{Key: gocui.MouseLeft, Modifier: gocui.ModNone, Handler: func() error { return self.HandleClick(nil) }},
{Tag: "navigation", Key: gocui.MouseWheelDown, Modifier: gocui.ModNone
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