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package context
import (
"fmt"
"github.com/jesseduffield/lazygit/pkg/gui/types"
)
type ListContextTrait struct {
types.Context
ListRenderer
c *ContextCommon
// 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
// If this is true, we only render the visible lines of the list. Useful for lists that can
// get very long, because it can save a lot of memory
renderOnlyVisibleLines bool
}
func (self *ListContextTrait) IsListContext() {}
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.
// Also, refreshing the viewport needs to happen after the view has been resized.
self.c.AfterLayout(func() error {
oldOrigin, _ := self.GetViewTrait().ViewPortYBounds()
self.GetViewTrait().FocusPoint(
self.ModelIndexToViewIndex(self.list.GetSelectedLineIdx()))
selectRangeIndex, isSelectingRange := self.list.GetRangeStartIdx()
if isSelectingRange {
selectRangeIndex = self.ModelIndexToViewIndex(selectRangeIndex)
self.GetViewTrait().SetRangeSelectStart(selectRangeIndex)
} else {
self.GetViewTrait().CancelRangeSelect()
}
if self.refreshViewportOnChange {
self.refreshViewport()
} else if self.renderOnlyVisibleLines {
newOrigin, _ := self.GetViewTrait().ViewPortYBounds()
if oldOrigin != newOrigin {
return self.HandleRender()
}
}
return nil
})
self.setFooter()
}
func (self *ListContextTrait) refreshViewport() {
startIdx, length := self.GetViewTrait().ViewPortYBounds()
content := self.renderLines(startIdx, startIdx+length)
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.ClampSelection()
if self.renderOnlyVisibleLines {
// Rendering only the visible area can save a lot of cell memory for
// those views that support it.
totalLength := self.list.Len()
if self.getNonModelItems != nil {
totalLength += len(self.getNonModelItems())
}
self.GetViewTrait().SetContentLineCount(totalLength)
startIdx, length := self.GetViewTrait().ViewPortYBounds()
content := self.renderLines(startIdx, startIdx+length)
self.GetViewTrait().SetViewPortContentAndClearEverythingElse(content)
} else {
content := self.renderLines(-1, -1)
self.GetViewTrait().SetContent(content)
}
self.c.Render()
self.setFooter()
return nil
}
func (self *ListContextTrait) OnSearchSelect(selectedLineIdx int) error {
self.GetList().SetSelection(self.ViewIndexToModelIndex(selectedLineIdx))
return self.HandleFocus(types.OnFocusOpts{})
}
func (self *ListContextTrait) IsItemVisible(item types.HasUrn) bool {
startIdx, length := self.GetViewTrait().ViewPortYBounds()
selectionStart := self.ViewIndexToModelIndex(startIdx)
selectionEnd := self.ViewIndexToModelIndex(startIdx + length)
for i := selectionStart; i < selectionEnd; i++ {
iterItem := self.GetList().GetItem(i)
if iterItem != nil && iterItem.URN() == item.URN() {
return true
}
}
return false
}
// By default, list contexts supporta range select
func (self *ListContextTrait) RangeSelectEnabled() bool {
return true
}
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