mirror of https://github.com/chzyer/readline.git
130 lines
2.5 KiB
Go
130 lines
2.5 KiB
Go
package readline
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import "io"
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type Instance struct {
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Config *Config
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Terminal *Terminal
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Operation *Operation
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}
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type Config struct {
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// prompt supports ANSI escape sequence, so we can color some characters even in windows
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Prompt string
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// readline will persist historys to file where HistoryFile specified
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HistoryFile string
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// specify the max length of historys, it's 500 by default
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HistoryLimit int
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// AutoCompleter will called once user press TAB
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AutoComplete AutoCompleter
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// If VimMode is true, readline will in vim.insert mode by default
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VimMode bool
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InterruptPrompt string
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EOFPrompt string
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Stdout io.Writer
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Stderr io.Writer
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inited bool
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}
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func (c *Config) Init() error {
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if c.inited {
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return nil
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}
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c.inited = true
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if c.Stdout == nil {
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c.Stdout = Stdout
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}
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if c.Stderr == nil {
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c.Stderr = Stderr
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}
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if c.HistoryLimit <= 0 {
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c.HistoryLimit = 500
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}
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if c.InterruptPrompt == "" {
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c.InterruptPrompt = "^C"
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} else if c.InterruptPrompt == "\n" {
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c.InterruptPrompt = ""
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}
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if c.EOFPrompt == "" {
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c.EOFPrompt = "^D"
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} else if c.EOFPrompt == "\n" {
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c.EOFPrompt = ""
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}
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return nil
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}
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func NewEx(cfg *Config) (*Instance, error) {
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t, err := NewTerminal(cfg)
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if err != nil {
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return nil, err
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}
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rl := t.Readline()
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return &Instance{
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Config: cfg,
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Terminal: t,
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Operation: rl,
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}, nil
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}
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func New(prompt string) (*Instance, error) {
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return NewEx(&Config{Prompt: prompt})
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}
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func (i *Instance) SetPrompt(s string) {
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i.Operation.SetPrompt(s)
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}
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// change hisotry persistence in runtime
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func (i *Instance) SetHistoryPath(p string) {
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i.Operation.SetHistoryPath(p)
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}
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// readline will refresh automatic when write through Stdout()
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func (i *Instance) Stdout() io.Writer {
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return i.Operation.Stdout()
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}
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// readline will refresh automatic when write through Stdout()
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func (i *Instance) Stderr() io.Writer {
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return i.Operation.Stderr()
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}
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// switch VimMode in runtime
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func (i *Instance) SetVimMode(on bool) {
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i.Operation.SetVimMode(on)
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}
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func (i *Instance) IsVimMode() bool {
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return i.Operation.IsEnableVimMode()
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}
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func (i *Instance) ReadPassword(prompt string) ([]byte, error) {
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return i.Operation.Password(prompt)
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}
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func (i *Instance) Readline() (string, error) {
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return i.Operation.String()
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}
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// same as readline
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func (i *Instance) ReadSlice() ([]byte, error) {
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return i.Operation.Slice()
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}
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// we must make sure that call Close() before process exit.
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func (i *Instance) Close() error {
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if err := i.Terminal.Close(); err != nil {
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return err
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}
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i.Operation.Close()
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return nil
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}
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