wip: refactoring tui

1 files changed, 157 insertions, 0 deletions

diff --git a/packages/tui/internal/components/list/list.go b/packages/tui/internal/components/list/list.go
new file mode 100644
index 000000000..8be3c7b01
--- /dev/null
+++ b/packages/tui/internal/components/list/list.go
@@ -0,0 +1,157 @@
+package list
+
+import (
+	"github.com/charmbracelet/bubbles/v2/key"
+	tea "github.com/charmbracelet/bubbletea/v2"
+	"github.com/charmbracelet/lipgloss/v2"
+	"github.com/sst/opencode/internal/layout"
+)
+
+type ListItem interface {
+	Render(selected bool, width int) string
+}
+
+type List[T ListItem] interface {
+	layout.ModelWithView
+	SetMaxWidth(maxWidth int)
+	GetSelectedItem() (item T, idx int)
+	SetItems(items []T)
+	GetItems() []T
+	SetSelectedIndex(idx int)
+	IsEmpty() bool
+}
+
+type listComponent[T ListItem] struct {
+	fallbackMsg         string
+	items               []T
+	selectedIdx         int
+	maxWidth            int
+	maxVisibleItems     int
+	useAlphaNumericKeys bool
+	width               int
+	height              int
+}
+
+type listKeyMap struct {
+	Up        key.Binding
+	Down      key.Binding
+	UpAlpha   key.Binding
+	DownAlpha key.Binding
+}
+
+var simpleListKeys = listKeyMap{
+	Up: key.NewBinding(
+		key.WithKeys("up"),
+		key.WithHelp("↑", "previous list item"),
+	),
+	Down: key.NewBinding(
+		key.WithKeys("down"),
+		key.WithHelp("↓", "next list item"),
+	),
+	UpAlpha: key.NewBinding(
+		key.WithKeys("k"),
+		key.WithHelp("k", "previous list item"),
+	),
+	DownAlpha: key.NewBinding(
+		key.WithKeys("j"),
+		key.WithHelp("j", "next list item"),
+	),
+}
+
+func (c *listComponent[T]) Init() tea.Cmd {
+	return nil
+}
+
+func (c *listComponent[T]) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch {
+		case key.Matches(msg, simpleListKeys.Up) || (c.useAlphaNumericKeys && key.Matches(msg, simpleListKeys.UpAlpha)):
+			if c.selectedIdx > 0 {
+				c.selectedIdx--
+			}
+			return c, nil
+		case key.Matches(msg, simpleListKeys.Down) || (c.useAlphaNumericKeys && key.Matches(msg, simpleListKeys.DownAlpha)):
+			if c.selectedIdx < len(c.items)-1 {
+				c.selectedIdx++
+			}
+			return c, nil
+		}
+	}
+
+	return c, nil
+}
+
+func (c *listComponent[T]) GetSelectedItem() (T, int) {
+	if len(c.items) > 0 {
+		return c.items[c.selectedIdx], c.selectedIdx
+	}
+
+	var zero T
+	return zero, -1
+}
+
+func (c *listComponent[T]) SetItems(items []T) {
+	c.selectedIdx = 0
+	c.items = items
+}
+
+func (c *listComponent[T]) GetItems() []T {
+	return c.items
+}
+
+func (c *listComponent[T]) IsEmpty() bool {
+	return len(c.items) == 0
+}
+
+func (c *listComponent[T]) SetMaxWidth(width int) {
+	c.maxWidth = width
+}
+
+func (c *listComponent[T]) SetSelectedIndex(idx int) {
+	if idx >= 0 && idx < len(c.items) {
+		c.selectedIdx = idx
+	}
+}
+
+func (c *listComponent[T]) View() string {
+	items := c.items
+	maxWidth := c.maxWidth
+	maxVisibleItems := min(c.maxVisibleItems, len(items))
+	startIdx := 0
+
+	if len(items) <= 0 {
+		return c.fallbackMsg
+	}
+
+	if len(items) > maxVisibleItems {
+		halfVisible := maxVisibleItems / 2
+		if c.selectedIdx >= halfVisible && c.selectedIdx < len(items)-halfVisible {
+			startIdx = c.selectedIdx - halfVisible
+		} else if c.selectedIdx >= len(items)-halfVisible {
+			startIdx = len(items) - maxVisibleItems
+		}
+	}
+
+	endIdx := min(startIdx+maxVisibleItems, len(items))
+
+	listItems := make([]string, 0, maxVisibleItems)
+
+	for i := startIdx; i < endIdx; i++ {
+		item := items[i]
+		title := item.Render(i == c.selectedIdx, maxWidth)
+		listItems = append(listItems, title)
+	}
+
+	return lipgloss.JoinVertical(lipgloss.Left, listItems...)
+}
+
+func NewListComponent[T ListItem](items []T, maxVisibleItems int, fallbackMsg string, useAlphaNumericKeys bool) List[T] {
+	return &listComponent[T]{
+		fallbackMsg:         fallbackMsg,
+		items:               items,
+		maxVisibleItems:     maxVisibleItems,
+		useAlphaNumericKeys: useAlphaNumericKeys,
+		selectedIdx:         0,
+	}
+}