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package tree
// Enumerator enumerates a tree. Typically, this is used to draw the branches
// for the tree nodes and is different for the last child.
//
// For example, the default enumerator would be:
//
// func TreeEnumerator(children Children, index int) string {
// if children.Length()-1 == index {
// return "└──"
// }
//
// return "├──"
// }
type Enumerator func(children Children, index int) string
// DefaultEnumerator enumerates a tree.
//
// ├── Foo
// ├── Bar
// ├── Baz
// └── Qux.
func DefaultEnumerator(children Children, index int) string {
if children.Length()-1 == index {
return "└──"
}
return "├──"
}
// RoundedEnumerator enumerates a tree with rounded edges.
//
// ├── Foo
// ├── Bar
// ├── Baz
// ╰── Qux.
func RoundedEnumerator(children Children, index int) string {
if children.Length()-1 == index {
return "╰──"
}
return "├──"
}
// 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(children Children, index int) string
// DefaultIndenter indents a tree for nested trees and multiline content.
//
// ├── Foo
// ├── Bar
// │ ├── Qux
// │ ├── Quux
// │ │ ├── Foo
// │ │ └── Bar
// │ └── Quuux
// └── Baz.
func DefaultIndenter(children Children, index int) string {
if children.Length()-1 == index {
return " "
}
return "│ "
}
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