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package layout
import (
"github.com/charmbracelet/bubbles/key"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
type GridLayout interface {
tea.Model
Sizeable
Bindings
Panes() [][]tea.Model
}
type gridLayout struct {
width int
height int
rows int
columns int
panes [][]tea.Model
gap int
bordered bool
focusable bool
currentRow int
currentColumn int
activeColor lipgloss.TerminalColor
}
type GridOption func(*gridLayout)
func (g *gridLayout) Init() tea.Cmd {
var cmds []tea.Cmd
for i := range g.panes {
for j := range g.panes[i] {
if g.panes[i][j] != nil {
cmds = append(cmds, g.panes[i][j].Init())
}
}
}
return tea.Batch(cmds...)
}
func (g *gridLayout) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var cmds []tea.Cmd
switch msg := msg.(type) {
case tea.WindowSizeMsg:
g.SetSize(msg.Width, msg.Height)
return g, nil
case tea.KeyMsg:
if key.Matches(msg, g.nextPaneBinding()) {
return g.focusNextPane()
}
}
// Update all panes
for i := range g.panes {
for j := range g.panes[i] {
if g.panes[i][j] != nil {
var cmd tea.Cmd
g.panes[i][j], cmd = g.panes[i][j].Update(msg)
if cmd != nil {
cmds = append(cmds, cmd)
}
}
}
}
return g, tea.Batch(cmds...)
}
func (g *gridLayout) focusNextPane() (tea.Model, tea.Cmd) {
if !g.focusable {
return g, nil
}
var cmds []tea.Cmd
// Blur current pane
if g.currentRow < len(g.panes) && g.currentColumn < len(g.panes[g.currentRow]) {
if currentPane, ok := g.panes[g.currentRow][g.currentColumn].(Focusable); ok {
cmds = append(cmds, currentPane.Blur())
}
}
// Find next valid pane
g.currentColumn++
if g.currentColumn >= len(g.panes[g.currentRow]) {
g.currentColumn = 0
g.currentRow++
if g.currentRow >= len(g.panes) {
g.currentRow = 0
}
}
// Focus next pane
if g.currentRow < len(g.panes) && g.currentColumn < len(g.panes[g.currentRow]) {
if nextPane, ok := g.panes[g.currentRow][g.currentColumn].(Focusable); ok {
cmds = append(cmds, nextPane.Focus())
}
}
return g, tea.Batch(cmds...)
}
func (g *gridLayout) nextPaneBinding() key.Binding {
return key.NewBinding(
key.WithKeys("tab"),
key.WithHelp("tab", "next pane"),
)
}
func (g *gridLayout) View() string {
if len(g.panes) == 0 {
return ""
}
// Calculate dimensions for each cell
cellWidth := (g.width - (g.columns-1)*g.gap) / g.columns
cellHeight := (g.height - (g.rows-1)*g.gap) / g.rows
// Render each row
rows := make([]string, g.rows)
for i := range g.rows {
// Render each column in this row
cols := make([]string, len(g.panes[i]))
for j := range g.panes[i] {
if g.panes[i][j] == nil {
cols[j] = ""
continue
}
// Set size for each pane
if sizable, ok := g.panes[i][j].(Sizeable); ok {
effectiveWidth, effectiveHeight := cellWidth, cellHeight
if g.bordered {
effectiveWidth -= 2
effectiveHeight -= 2
}
sizable.SetSize(effectiveWidth, effectiveHeight)
}
// Render the pane
content := g.panes[i][j].View()
// Apply border if needed
if g.bordered {
isFocused := false
if focusable, ok := g.panes[i][j].(Focusable); ok {
isFocused = focusable.IsFocused()
}
borderText := map[BorderPosition]string{}
if bordered, ok := g.panes[i][j].(Bordered); ok {
borderText = bordered.BorderText()
}
content = Borderize(content, BorderOptions{
Active: isFocused,
EmbeddedText: borderText,
})
}
cols[j] = content
}
// Join columns with gap
rows[i] = lipgloss.JoinHorizontal(lipgloss.Top, cols...)
}
// Join rows with gap
return lipgloss.JoinVertical(lipgloss.Left, rows...)
}
func (g *gridLayout) SetSize(width, height int) {
g.width = width
g.height = height
}
func (g *gridLayout) GetSize() (int, int) {
return g.width, g.height
}
func (g *gridLayout) BindingKeys() []key.Binding {
var bindings []key.Binding
bindings = append(bindings, g.nextPaneBinding())
// Collect bindings from all panes
for i := range g.panes {
for j := range g.panes[i] {
if g.panes[i][j] != nil {
if bindable, ok := g.panes[i][j].(Bindings); ok {
bindings = append(bindings, bindable.BindingKeys()...)
}
}
}
}
return bindings
}
func (g *gridLayout) Panes() [][]tea.Model {
return g.panes
}
// NewGridLayout creates a new grid layout with the given number of rows and columns
func NewGridLayout(rows, cols int, panes [][]tea.Model, opts ...GridOption) GridLayout {
grid := &gridLayout{
rows: rows,
columns: cols,
panes: panes,
gap: 1,
}
for _, opt := range opts {
opt(grid)
}
return grid
}
// WithGridGap sets the gap between cells
func WithGridGap(gap int) GridOption {
return func(g *gridLayout) {
g.gap = gap
}
}
// WithGridBordered sets whether cells should have borders
func WithGridBordered(bordered bool) GridOption {
return func(g *gridLayout) {
g.bordered = bordered
}
}
// WithGridFocusable sets whether the grid supports focus navigation
func WithGridFocusable(focusable bool) GridOption {
return func(g *gridLayout) {
g.focusable = focusable
}
}
// WithGridActiveColor sets the active border color
func WithGridActiveColor(color lipgloss.TerminalColor) GridOption {
return func(g *gridLayout) {
g.activeColor = color
}
}
|
