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package tk
import (
"fmt"
"src.elv.sh/pkg/ui"
)
// ListBoxState keeps the mutable state ListBox.
type ListBoxState struct {
Items Items
Selected int
// The first element to show. Used when rendering and adjusted accordingly
// when the terminal size changes or the user has scrolled.
First int
// Height of the listbox, excluding horizontal scrollbar when using the
// horizontal layout. Stored in the state for commands to move the cursor by
// page (for vertical layout) or column (for horizontal layout).
ContentHeight 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
}
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