104 lines
2.2 KiB
Go
104 lines
2.2 KiB
Go
package survey
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import (
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"fmt"
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"strings"
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"gopkg.in/AlecAivazis/survey.v1/core"
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"gopkg.in/AlecAivazis/survey.v1/terminal"
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)
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type Multiline struct {
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core.Renderer
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Message string
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Default string
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Help string
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}
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// data available to the templates when processing
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type MultilineTemplateData struct {
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Multiline
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Answer string
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ShowAnswer bool
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ShowHelp bool
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}
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// Templates with Color formatting. See Documentation: https://github.com/mgutz/ansi#style-format
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var MultilineQuestionTemplate = `
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{{- if .ShowHelp }}{{- color "cyan"}}{{ HelpIcon }} {{ .Help }}{{color "reset"}}{{"\n"}}{{end}}
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{{- color "green+hb"}}{{ QuestionIcon }} {{color "reset"}}
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{{- color "default+hb"}}{{ .Message }} {{color "reset"}}
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{{- if .ShowAnswer}}
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{{- "\n"}}{{color "cyan"}}{{.Answer}}{{color "reset"}}{{"\n"}}
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{{- else }}
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{{- if .Default}}{{color "white"}}({{.Default}}) {{color "reset"}}{{end}}
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{{- color "cyan"}}[Enter 2 empty lines to finish]{{color "reset"}}
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{{- end}}`
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func (i *Multiline) Prompt() (interface{}, error) {
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// render the template
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err := i.Render(
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MultilineQuestionTemplate,
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MultilineTemplateData{Multiline: *i},
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)
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if err != nil {
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return "", err
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}
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fmt.Println()
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// start reading runes from the standard in
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rr := i.NewRuneReader()
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rr.SetTermMode()
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defer rr.RestoreTermMode()
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cursor := i.NewCursor()
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multiline := make([]string, 0)
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emptyOnce := false
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// get the next line
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for {
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line := []rune{}
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line, err = rr.ReadLine(0)
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if err != nil {
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return string(line), err
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}
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if string(line) == "" {
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if emptyOnce {
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numLines := len(multiline) + 2
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cursor.PreviousLine(numLines)
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for j := 0; j < numLines; j++ {
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terminal.EraseLine(i.Stdio().Out, terminal.ERASE_LINE_ALL)
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cursor.NextLine(1)
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}
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cursor.PreviousLine(numLines)
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break
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}
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emptyOnce = true
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} else {
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emptyOnce = false
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}
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multiline = append(multiline, string(line))
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}
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val := strings.Join(multiline, "\n")
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val = strings.TrimSpace(val)
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// if the line is empty
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if len(val) == 0 {
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// use the default value
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return i.Default, err
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}
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// we're done
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return val, err
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}
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func (i *Multiline) Cleanup(val interface{}) error {
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return i.Render(
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MultilineQuestionTemplate,
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MultilineTemplateData{Multiline: *i, Answer: val.(string), ShowAnswer: true},
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)
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}
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