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package context
import (
"fmt"
"github.com/jesseduffield/lazygit/pkg/gui/types"
"github.com/jesseduffield/lazygit/pkg/utils"
)
type ListContextTrait struct {
types.Context
c *ContextCommon
list types.IList
getDisplayStrings func(startIdx int, length int) [][]string
// Alignment for each column. If nil, the default is left alignment
columnAlignments []utils.Alignment
// Some contexts, like the commit context, will highlight the path from the selected commit
// to its parents, because it's ambiguous otherwise. For these, we need to refresh the viewport
// so that we show the highlighted path.
// TODO: now that we allow scrolling, we should be smarter about what gets refreshed:
// we should find out exactly which lines are now part of the path and refresh those.
// We should also keep track of the previous path and refresh those lines too.
refreshViewportOnChange bool
}
func (self *ListContextTrait) IsListContext() {}
func (self *ListContextTrait) GetList() types.IList {
return self.list
}
func (self *ListContextTrait) FocusLine() {
// Doing this at the end of the layout function because we need the view to be
// resized before we focus the line, otherwise if we're in accordion mode
// the view could be squashed and won't how to adjust the cursor/origin
self.c.AfterLayout(func() error {
self.GetViewTrait().FocusPoint(self.list.GetSelectedLineIdx())
return nil
})
self.setFooter()
if self.refreshViewportOnChange {
self.refreshViewport()
}
}
func (self *ListContextTrait) refreshViewport() {
startIdx, length := self.GetViewTrait().ViewPortYBounds()
displayStrings := self.getDisplayStrings(startIdx, length)
content := utils.RenderDisplayStrings(displayStrings, nil)
self.GetViewTrait().SetViewPortContent(content)
}
func (self *ListContextTrait) setFooter() {
self.GetViewTrait().SetFooter(formatListFooter(self.list.GetSelectedLineIdx(), self.list.Len()))
}
func formatListFooter(selectedLineIdx int, length int) string {
return fmt.Sprintf("%d of %d", selectedLineIdx+1, length)
}
func (self *ListContextTrait) HandleFocus(opts types.OnFocusOpts) error {
self.FocusLine()
self.GetViewTrait().SetHighlight(self.list.Len() > 0)
return self.Context.HandleFocus(opts)
}
func (self *ListContextTrait) HandleFocusLost(opts types.OnFocusLostOpts) error {
self.GetViewTrait().SetOriginX(0)
if self.refreshViewportOnChange {
self.refreshViewport()
}
return self.Context.HandleFocusLost(opts)
}
// 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 {
self.list.RefreshSelectedIdx()
content := utils.RenderDisplayStrings(
self.getDisplayStrings(0, self.list.Len()),
self.columnAlignments,
)
self.GetViewTrait().SetContent(content)
self.c.Render()
self.setFooter()
return nil
}
func (self *ListContextTrait) OnSearchSelect(selectedLineIdx int) error {
self.GetList().SetSelectedLineIdx(selectedLineIdx)
return self.HandleFocus(types.OnFocusOpts{})
}
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