125 lines
3.0 KiB
Go
125 lines
3.0 KiB
Go
package internal
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import (
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"fmt"
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"strings"
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"github.com/charmbracelet/lipgloss"
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)
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// ────────────────────────────────
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// STYLES
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// ────────────────────────────────
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type Styles struct {
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Title lipgloss.Style
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Box lipgloss.Style
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Active lipgloss.Style
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Status lipgloss.Style
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}
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func NewStyles() Styles {
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border := lipgloss.RoundedBorder()
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return Styles{
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Title: lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("12")),
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Box: lipgloss.NewStyle().Border(border).Padding(0, 1).MarginRight(1),
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Active: lipgloss.NewStyle().Border(border).BorderForeground(lipgloss.Color("10")).Padding(0, 1).MarginRight(1),
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Status: lipgloss.NewStyle().Foreground(lipgloss.Color("8")).MarginTop(1),
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}
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}
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// ────────────────────────────────
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// GENERIC LIST COLUMN (SCROLLABLE)
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// ────────────────────────────────
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type renderer[T any] func(T) string
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type ListColumn[T any] struct {
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title string
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items []T
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selected int
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scroll int
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width int
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height int
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render renderer[T]
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}
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func NewListColumn[T any](title string, r renderer[T]) *ListColumn[T] {
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return &ListColumn[T]{title: title, render: r, width: 30, height: 20}
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}
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func (c *ListColumn[T]) SetItems(items []T) {
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c.items = items
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c.selected = 0
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c.scroll = 0
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}
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func (c *ListColumn[T]) SetTitle(title string) { c.title = title }
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func (c *ListColumn[T]) SetWidth(w int) { if w > 20 { c.width = w - 2 } }
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func (c *ListColumn[T]) SetHeight(h int) { if h > 5 { c.height = h - 5 } }
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func (c *ListColumn[T]) CursorUp() {
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if c.selected > 0 {
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c.selected--
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}
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if c.selected < c.scroll {
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c.scroll = c.selected
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}
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}
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func (c *ListColumn[T]) CursorDown() {
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if c.selected < len(c.items)-1 {
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c.selected++
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}
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if c.selected >= c.scroll+c.height {
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c.scroll = c.selected - c.height + 1
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}
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}
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func (c *ListColumn[T]) Selected() (T, bool) {
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var zero T
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if len(c.items) == 0 {
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return zero, false
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}
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return c.items[c.selected], true
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}
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func (c *ListColumn[T]) View(styles Styles, focused bool) string {
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box := styles.Box
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if focused {
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box = styles.Active
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}
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head := styles.Title.Render(c.title)
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lines := []string{}
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if len(c.items) == 0 {
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lines = append(lines, "(no items)")
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} else {
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start := c.scroll
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end := start + c.height
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if end > len(c.items) {
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end = len(c.items)
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}
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for i := start; i < end; i++ {
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cursor := " "
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if i == c.selected {
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cursor = "▸ "
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}
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line := fmt.Sprintf("%s%s", cursor, c.render(c.items[i]))
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if len(line) > c.width && c.width > 3 {
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line = line[:c.width-3] + "…"
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}
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lines = append(lines, line)
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}
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}
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// Fill remaining lines if fewer than height
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for len(lines) < c.height {
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lines = append(lines, "")
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}
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content := strings.Join(lines, "\n")
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return box.Width(c.width + 2).Render(head + "\n" + content)
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}
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