elvish/pkg/cli/tk/listbox_state.go
Qi Xiao 0427c536d0 Simplify the API of pkg/cli.
* Move all widget types to a new pkg/cli/tk.

* Move Mode{Line Prompt} to a new pkg/cli/mode.

* Move all packages in pkg/cli/addons to pkg/cli/mode.

* Remove WriteListing.

* Remove StdTTY.

* Rename GetCodeBuffer to CodeBuffer.
2021-02-11 19:24:37 +00:00

46 lines
885 B
Go

package tk
import (
"fmt"
"src.elv.sh/pkg/ui"
)
// ListBoxState keeps the mutable state ListBox.
type ListBoxState struct {
Items Items
Selected int
First int
Height int
}
// Items is an interface for accessing multiple items.
type Items interface {
// Show renders the item at the given zero-based index.
Show(i int) ui.Text
// Len returns the number of items.
Len() int
}
// TestItems is an implementation of Items useful for testing.
type TestItems struct {
Prefix string
Style ui.Styling
NItems int
}
// Show returns a plain text consisting of the prefix and i. If the prefix is
// empty, it defaults to "item ".
func (it TestItems) Show(i int) ui.Text {
prefix := it.Prefix
if prefix == "" {
prefix = "item "
}
return ui.T(fmt.Sprintf("%s%d", prefix, i), it.Style)
}
// Len returns it.NItems.
func (it TestItems) Len() int {
return it.NItems
}