readline

type AutoCompleter interface {
	// Readline will pass the whole line and current offset to it
	// Completer need to pass all the candidates, and how long they shared the same characters in line
	// Example:
	//   [go, git, git-shell, grep]
	//   Do("g", 1) => ["o", "it", "it-shell", "rep"], 1
	//   Do("gi", 2) => ["t", "t-shell"], 2
	//   Do("git", 3) => ["", "-shell"], 3
	Do(line []rune, pos int) (newLine [][]rune, length int)
}

type Config struct {
	// prompt supports ANSI escape sequence, so we can color some characters even in windows
	Prompt string

	// readline will persist historys to file where HistoryFile specified
	HistoryFile string
	// specify the max length of historys, it's 500 by default, set it to -1 to disable history
	HistoryLimit           int
	DisableAutoSaveHistory bool
	// enable case-insensitive history searching
	HistorySearchFold bool

	// AutoCompleter will called once user press TAB
	AutoComplete AutoCompleter

	// Any key press will pass to Listener
	// NOTE: Listener will be triggered by (nil, 0, 0) immediately
	Listener Listener

	Painter Painter

	// If VimMode is true, readline will in vim.insert mode by default
	VimMode bool

	InterruptPrompt string
	EOFPrompt       string

	FuncGetWidth func() int
	// Function that returns width, height of the terminal or -1,-1 if unknown
	FuncGetSize func() (width int, height int)

	Stdin  io.Reader
	Stdout io.Writer
	Stderr io.Writer

	EnableMask bool
	MaskRune   rune

	// erase the editing line after user submited it
	// it use in IM usually.
	UniqueEditLine bool

	// filter input runes (may be used to disable CtrlZ or for translating some keys to different actions)
	// -> output = new (translated) rune and true/false if continue with processing this one
	FuncFilterInputRune func(rune) (rune, bool)

	// force use interactive even stdout is not a tty
	FuncIsTerminal      func() bool
	FuncMakeRaw         func() error
	FuncExitRaw         func() error
	FuncOnWidthChanged  func(func())
	ForceUseInteractive bool
	// contains filtered or unexported fields
}

type DumpListener struct {
	// contains filtered or unexported fields
}

type DynamicCompleteFunc func(string) []string

type DynamicPrefixCompleterInterface interface {
	PrefixCompleterInterface
	IsDynamic() bool
	GetDynamicNames(line []rune) [][]rune
}

type Instance struct {
	// contains filtered or unexported fields
}

type Listener interface {
	OnChange(line []rune, pos int, key rune) (newLine []rune, newPos int, ok bool)
}

type Painter interface {
	Paint(line []rune, pos int) []rune
}

type PrefixCompleter struct {
	Name     []rune
	Dynamic  bool
	Callback DynamicCompleteFunc
	Children []PrefixCompleterInterface
}

type PrefixCompleterInterface interface {
	Print(prefix string, level int, buf *bytes.Buffer)
	Do(line []rune, pos int) (newLine [][]rune, length int)
	GetName() []rune
	GetChildren() []PrefixCompleterInterface
	SetChildren(children []PrefixCompleterInterface)
}

type SegmentComplete struct {
	SegmentCompleter
}

type SegmentCompleter interface {
	// a
	// |- a1
	// |--- a11
	// |- a2
	// b
	// input:
	//   DoTree([], 0) [a, b]
	//   DoTree([a], 1) [a]
	//   DoTree([a, ], 0) [a1, a2]
	//   DoTree([a, a], 1) [a1, a2]
	//   DoTree([a, a1], 2) [a1]
	//   DoTree([a, a1, ], 0) [a11]
	//   DoTree([a, a1, a], 1) [a11]
	DoSegment([][]rune, int) [][]rune
}

type TabCompleter struct{}