Drop Tree (#330)

* fix: move tree to internal

* feat: tree indenter on lists

* fix: sublist example

* fix: remove tree

examples/go.mod

@@ -4,8 +4,6 @@ go 1.19
 
 replace github.com/charmbracelet/lipgloss => ../
 
-replace github.com/charmbracelet/lipgloss/tree => ../tree
-
 replace github.com/charmbracelet/lipgloss/list => ../list
 
 require (

examples/list/sublist/main.go

@@ -6,7 +6,6 @@ import (
 	"github.com/charmbracelet/lipgloss"
 	"github.com/charmbracelet/lipgloss/list"
 	"github.com/charmbracelet/lipgloss/table"
-	"github.com/charmbracelet/lipgloss/tree"
 	"github.com/lucasb-eyer/go-colorful"
 )
 
@@ -119,16 +118,16 @@ func main() {
 								Item("Lip Gloss").
 								Item("Lip Gloss").
 								Item(
-									tree.New().
+									list.New().
 										EnumeratorStyle(lipgloss.NewStyle().Foreground(lipgloss.Color(colors[4][0])).MarginRight(1)).
-										Child("\nStyle Definitions for Nice Terminal Layouts\n─────").
-										Child("From Charm").
-										Child("https://github.com/charmbracelet/lipgloss").
-										Child(
-											tree.New().
+										Item("\nStyle Definitions for Nice Terminal Layouts\n─────").
+										Item("From Charm").
+										Item("https://github.com/charmbracelet/lipgloss").
+										Item(
+											list.New().
 												EnumeratorStyle(lipgloss.NewStyle().Foreground(lipgloss.Color(colors[3][0])).MarginRight(1)).
-												Child("Emperors: Julio-Claudian dynasty").
-												Child(
+												Item("Emperors: Julio-Claudian dynasty").
+												Item(
 													lipgloss.NewStyle().Padding(1).Render(
 														list.New(
 															"Augustus",
@@ -139,7 +138,7 @@ func main() {
 														).Enumerator(list.Roman).String(),
 													),
 												).
-												Child(
+												Item(
 													lipgloss.NewStyle().
 														Bold(true).
 														Foreground(lipgloss.Color("#FAFAFA")).
@@ -151,7 +150,7 @@ func main() {
 														Width(40).
 														Render(history),
 												).
-												Child(
+												Item(
 													table.New().
 														Width(30).
 														BorderStyle(purple.MarginRight(0)).
@@ -174,8 +173,8 @@ func main() {
 														Row("Orange", "2").
 														Row("Strawberry", "12"),
 												).
-												Child("Documents").
-												Child(
+												Item("Documents").
+												Item(
 													list.New().
 														Enumerator(func(_ list.Items, i int) string {
 															if i == 1 {
@@ -200,9 +199,9 @@ func main() {
 														Item("Baz Document\n" + faint.Render("10 minutes ago")).
 														Item("Qux Document\n" + faint.Render("1 month ago")),
 												).
-												Child("EOF"),
+												Item("EOF"),
 										).
-										Child("go get github.com/charmbracelet/lipgloss/list\n"),
+										Item("go get github.com/charmbracelet/lipgloss/list\n"),
 								).
 								Item("See ya later"),
 						),

tree/tree_test.go → internal/tree/tree_test.go

@@ -7,9 +7,9 @@ import (
 
 	"github.com/aymanbagabas/go-udiff"
 	"github.com/charmbracelet/lipgloss"
+	"github.com/charmbracelet/lipgloss/internal/tree"
 	"github.com/charmbracelet/lipgloss/list"
 	"github.com/charmbracelet/lipgloss/table"
-	"github.com/charmbracelet/lipgloss/tree"
 )
 
 func TestTree(t *testing.T) {

list/enumerator.go

@@ -25,6 +25,22 @@ import (
 // Or, define your own.
 type Enumerator func(items Items, index int) string
 
+// Indenter indents the children of a tree.
+//
+// Indenters allow for displaying nested tree items with connecting borders
+// to sibling nodes.
+//
+// For example, the default indenter would be:
+//
+//	func TreeIndenter(children Children, index int) string {
+//		if children.Length()-1 == index {
+//			return "│  "
+//		}
+//
+//		return "   "
+//	}
+type Indenter func(items Items, index int) string
+
 // Alphabet is the enumeration for alphabetical listing.
 //
 // a. Foo
@@ -104,3 +120,33 @@ func Asterisk(Items, int) string {
 func Dash(Items, int) string {
 	return "-"
 }
+
+// Tree enumerates a tree.
+//
+// ├── Foo
+// ├── Bar
+// ├── Baz
+// └── Qux.
+func Tree(items Items, index int) string {
+	if items.Length()-1 == index {
+		return "└──"
+	}
+	return "├──"
+}
+
+// DefaultIndenter indents a tree for nested trees and multiline content.
+//
+// ├── Foo
+// ├── Bar
+// │   ├── Qux
+// │   ├── Quux
+// │   │   ├── Foo
+// │   │   └── Bar
+// │   └── Quuux
+// └── Baz.
+func TreeIndenter(items Items, index int) string {
+	if items.Length()-1 == index {
+		return "   "
+	}
+	return "│  "
+}

list/list.go

@@ -24,7 +24,7 @@ package list
 
 import (
 	"github.com/charmbracelet/lipgloss"
-	"github.com/charmbracelet/lipgloss/tree"
+	"github.com/charmbracelet/lipgloss/internal/tree"
 )
 
 // List represents a list of items that can be displayed. Lists can contain
@@ -49,7 +49,9 @@ type List struct{ tree *tree.Tree }
 // anything you want, really.
 func New(items ...any) *List {
 	l := &List{tree: tree.New()}
-	return l.Items(items...).Enumerator(Bullet)
+	return l.Items(items...).
+		Enumerator(Bullet).
+		Indenter(func(Items, int) string { return " " })
 }
 
 // Items represents the list items.
@@ -145,6 +147,36 @@ func (l *List) EnumeratorStyleFunc(f StyleFunc) *List {
 	return l
 }
 
+// Indenter sets the indenter implementation. This is used to change the way
+// the tree is indented. The default indentor places a border connecting sibling
+// elements and no border for the last child.
+//
+//	└── Foo
+//	    └── Bar
+//	        └── Baz
+//	            └── Qux
+//	                └── Quux
+//
+// You can define your own indenter.
+//
+//	func ArrowIndenter(children tree.Children, index int) string {
+//		return "→ "
+//	}
+//
+//	→ Foo
+//	→ → Bar
+//	→ → → Baz
+//	→ → → → Qux
+//	→ → → → → Quux
+func (l *List) Indenter(indenter Indenter) *List {
+	l.tree.Indenter(
+		func(children tree.Children, index int) string {
+			return indenter(children, index)
+		},
+	)
+	return l
+}
+
 // ItemStyle sets the item style for all items.
 //
 // To set the item style conditionally based on the item value or index,
@@ -225,6 +257,5 @@ func (l *List) Items(items ...any) *List {
 //	 Baz. Baz
 func (l *List) Enumerator(enumerator Enumerator) *List {
 	l.tree.Enumerator(func(c tree.Children, i int) string { return enumerator(c, i) })
-	l.tree.Indenter(func(tree.Children, int) string { return " " })
 	return l
 }

list/list_test.go

@@ -7,8 +7,8 @@ import (
 
 	"github.com/aymanbagabas/go-udiff"
 	"github.com/charmbracelet/lipgloss"
+	"github.com/charmbracelet/lipgloss/internal/tree"
 	"github.com/charmbracelet/lipgloss/list"
-	"github.com/charmbracelet/lipgloss/tree"
 )
 
 // XXX: can't write multi-line examples if the underlying string uses